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class="vector-toc-numb">2</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Variants_of_DPFs" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Variants_of_DPFs"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Variants of DPFs</span> </div> </a> <button aria-controls="toc-Variants_of_DPFs-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Variants of DPFs subsection</span> </button> <ul id="toc-Variants_of_DPFs-sublist" class="vector-toc-list"> <li id="toc-Cordierite_wall_flow_filters" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Cordierite_wall_flow_filters"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Cordierite wall flow filters</span> </div> </a> <ul id="toc-Cordierite_wall_flow_filters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Silicon_carbide_wall_flow_filters" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Silicon_carbide_wall_flow_filters"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Silicon carbide wall flow filters</span> </div> </a> <ul id="toc-Silicon_carbide_wall_flow_filters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ceramic_fiber_filters" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ceramic_fiber_filters"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Ceramic fiber filters</span> </div> </a> <ul id="toc-Ceramic_fiber_filters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Metal_fiber_flow-through_filters" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Metal_fiber_flow-through_filters"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>Metal fiber flow-through filters</span> </div> </a> <ul id="toc-Metal_fiber_flow-through_filters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Paper" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Paper"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.5</span> <span>Paper</span> </div> </a> <ul id="toc-Paper-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Partial_filters" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Partial_filters"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.6</span> <span>Partial filters</span> </div> </a> <ul id="toc-Partial_filters-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Maintenance" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Maintenance"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Maintenance</span> </div> </a> <ul id="toc-Maintenance-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Safety" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Safety"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Safety</span> </div> </a> <ul id="toc-Safety-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Regeneration" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Regeneration"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Regeneration</span> </div> </a> <ul id="toc-Regeneration-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Removal_or_tampering" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Removal_or_tampering"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Removal or tampering</span> </div> </a> <ul id="toc-Removal_or_tampering-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Diesel particulate filter</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 22 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-22" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">22 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A4%D0%B8%D0%BB%D1%82%D1%8A%D1%80_%D0%B7%D0%B0_%D0%B4%D0%B8%D0%B7%D0%B5%D0%BB%D0%BE%D0%B2%D0%B8_%D1%81%D0%B0%D0%B6%D0%B4%D0%B8" title="Филтър за дизелови сажди – Bulgarian" lang="bg" hreflang="bg" data-title="Филтър за дизелови сажди" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Filtre_anti-part%C3%ADcules" title="Filtre anti-partícules – Catalan" lang="ca" hreflang="ca" data-title="Filtre anti-partícules" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Filtr_pevn%C3%BDch_%C4%8D%C3%A1stic" title="Filtr pevných částic – Czech" lang="cs" hreflang="cs" data-title="Filtr pevných částic" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Dieselpartikelfilter" title="Dieselpartikelfilter – Danish" lang="da" hreflang="da" data-title="Dieselpartikelfilter" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Dieselru%C3%9Fpartikelfilter" title="Dieselrußpartikelfilter – German" lang="de" hreflang="de" data-title="Dieselrußpartikelfilter" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Tahmafilter" title="Tahmafilter – Estonian" lang="et" hreflang="et" data-title="Tahmafilter" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Filtro_antipart%C3%ADculas" title="Filtro antipartículas – Spanish" lang="es" hreflang="es" data-title="Filtro antipartículas" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Filtre_%C3%A0_particules" title="Filtre à particules – French" lang="fr" hreflang="fr" data-title="Filtre à particules" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%94%94%EC%A0%A4_%EB%AF%B8%EB%A6%BD%EC%9E%90_%ED%95%84%ED%84%B0" title="디젤 미립자 필터 – Korean" lang="ko" hreflang="ko" data-title="디젤 미립자 필터" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Filtro_antiparticolato" title="Filtro antiparticolato – Italian" lang="it" hreflang="it" data-title="Filtro antiparticolato" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/D%C3%ADzel_r%C3%A9szecskesz%C5%B1r%C5%91" title="Dízel részecskeszűrő – Hungarian" lang="hu" hreflang="hu" data-title="Dízel részecskeszűrő" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Roetfilter" title="Roetfilter – Dutch" lang="nl" hreflang="nl" data-title="Roetfilter" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%87%E3%82%A3%E3%83%BC%E3%82%BC%E3%83%AB%E5%BE%AE%E7%B2%92%E5%AD%90%E6%8D%95%E9%9B%86%E3%83%95%E3%82%A3%E3%83%AB%E3%82%BF%E3%83%BC" title="ディーゼル微粒子捕集フィルター – Japanese" lang="ja" hreflang="ja" data-title="ディーゼル微粒子捕集フィルター" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Filtr_cz%C4%85stek_sta%C5%82ych" title="Filtr cząstek stałych – Polish" lang="pl" hreflang="pl" data-title="Filtr cząstek stałych" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Filtro_de_part%C3%ADculas_diesel" title="Filtro de partículas diesel – Portuguese" lang="pt" hreflang="pt" data-title="Filtro de partículas diesel" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D0%BE%D1%81%D0%B0%D0%B6%D0%B5%D0%B2%D1%8B%D0%B9_%D1%84%D0%B8%D0%BB%D1%8C%D1%82%D1%80" title="Противосажевый фильтр – Russian" lang="ru" hreflang="ru" data-title="Противосажевый фильтр" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Filter_pevn%C3%BDch_%C4%8Dast%C3%ADc" title="Filter pevných častíc – Slovak" lang="sk" hreflang="sk" data-title="Filter pevných častíc" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Hiukkassuodatin" title="Hiukkassuodatin – Finnish" lang="fi" hreflang="fi" data-title="Hiukkassuodatin" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Partikelfilter" title="Partikelfilter – Swedish" lang="sv" hreflang="sv" data-title="Partikelfilter" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Dizel_partik%C3%BCl_filtresi" title="Dizel partikül filtresi – Turkish" lang="tr" hreflang="tr" data-title="Dizel partikül filtresi" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D0%B8%D0%B7%D0%B5%D0%BB%D1%8C%D0%BD%D0%B8%D0%B9_%D1%81%D0%B0%D0%B6%D0%BE%D0%B2%D0%B8%D0%B9_%D1%84%D1%96%D0%BB%D1%8C%D1%82%D1%80" title="Дизельний сажовий фільтр – Ukrainian" lang="uk" hreflang="uk" data-title="Дизельний сажовий фільтр" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%9F%B4%E6%B2%B9%E7%A2%B3%E5%BE%AE%E7%B2%92%E6%BF%BE%E6%B8%85%E5%99%A8" title="柴油碳微粒濾清器 – Chinese" lang="zh" hreflang="zh" data-title="柴油碳微粒濾清器" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1134383#sitelinks-wikipedia" 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id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Diesel_Particulate_Filter&redirect=no" class="mw-redirect" title="Diesel Particulate Filter">Diesel Particulate Filter</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Removes diesel particulate matter or soot from the exhaust gas of a diesel engine</div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/33/412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg/220px-412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg" decoding="async" width="220" height="146" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/33/412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg/330px-412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/33/412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg/440px-412_DSP_Transportation_233_-_DPLA_-_f9cee0a0b307aa1e63acc0e67b6a339c.jpg 2x" data-file-width="4288" data-file-height="2848" /></a><figcaption>Diesel particulate filter of a school bus</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:FAP-Filter_Peugeot.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/57/FAP-Filter_Peugeot.jpg/220px-FAP-Filter_Peugeot.jpg" decoding="async" width="220" height="205" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/57/FAP-Filter_Peugeot.jpg/330px-FAP-Filter_Peugeot.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/57/FAP-Filter_Peugeot.jpg/440px-FAP-Filter_Peugeot.jpg 2x" data-file-width="1650" data-file-height="1541" /></a><figcaption>A diesel particulate filter (top left) in a Peugeot</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:DPF_Installation.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/DPF_Installation.jpg/220px-DPF_Installation.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/DPF_Installation.jpg/330px-DPF_Installation.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/DPF_Installation.jpg/440px-DPF_Installation.jpg 2x" data-file-width="1600" data-file-height="1200" /></a><figcaption>Off-road – DPF installation</figcaption></figure> <p>A <b>diesel particulate filter</b> (<b>DPF</b>) is a device designed to remove <a href="/wiki/Diesel_exhaust#Particulates" title="Diesel exhaust">diesel particulate matter</a><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/MOS:BROKENSECTIONLINKS" class="mw-redirect" title="MOS:BROKENSECTIONLINKS"><span title="Anchor "diesel exhaust#Particulates" links to a specific web page: "Particulates". The anchor (Particulates) has been deleted. (2024-09-29)">broken anchor</span></a></i>]</sup> or <a href="/wiki/Soot" title="Soot">soot</a> from the <a href="/wiki/Exhaust_gas" title="Exhaust gas">exhaust gas</a> of a <a href="/wiki/Diesel_engine" title="Diesel engine">diesel engine</a>.<sup id="cite_ref-nash_1-0" class="reference"><a href="#cite_note-nash-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ax_2-0" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Mode_of_action">Mode of action</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=1" title="Edit section: Mode of action"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Wall-flow diesel particulate filters usually remove 85% or more of the soot, and under certain conditions can attain soot removal efficiencies approaching 100%. Some filters are single-use, intended for disposal and replacement once full of accumulated ash. Others are designed to burn off the accumulated particulate either passively through the use of a <a href="/wiki/Catalyst" class="mw-redirect" title="Catalyst">catalyst</a> or by active means such as a fuel burner which heats the filter to soot combustion temperatures. This is accomplished by engine programming to run (when the filter is full) in a manner that elevates exhaust temperature, in conjunction with an extra fuel injector in the exhaust stream that injects fuel to react with a catalyst element to burn off accumulated soot in the DPF filter,<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> or through other methods. This is known as <em>filter regeneration</em>. Cleaning is also required as part of periodic maintenance, and it must be done carefully to avoid damaging the filter. Failure of fuel injectors or turbochargers resulting in contamination of the filter with raw diesel or engine oil can also necessitate cleaning.<sup id="cite_ref-hdt_4-0" class="reference"><a href="#cite_note-hdt-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The regeneration process occurs at road speeds higher than can generally be attained on city streets; vehicles driven exclusively at low speeds in urban traffic can require periodic trips at higher speeds to clean out the DPF.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> If the driver ignores the <a href="/wiki/Tell-tale_(automotive)" title="Tell-tale (automotive)">warning light</a> and waits too long to operate the vehicle above 60 km/h (40 mph), the DPF may not regenerate properly, and continued operation past that point may spoil the DPF completely so it must be replaced.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Some newer diesel engines, namely those installed in combination vehicles, can also perform what is called a Parked Regeneration, where the engine increases RPM to around 1400 while parked, to increase the temperature of the exhaust. </p><p><a href="/wiki/Diesel_engine" title="Diesel engine">Diesel engines</a> produce a variety of particles during the combustion of the fuel/air mix due to incomplete combustion. The composition of the particles varies widely dependent upon engine type, age, and the emissions specification that the engine was designed to meet. <a href="/wiki/Two-stroke_engine#Two-stroke_diesel_engine" title="Two-stroke engine">Two-stroke</a> diesel engines produce more particulate per unit of power than do <a href="/wiki/Four-stroke" class="mw-redirect" title="Four-stroke">four-stroke</a> diesel engines, as they burn the fuel-air mix less completely.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>Diesel particulate matter resulting from the incomplete combustion of <a href="/wiki/Diesel_fuel" title="Diesel fuel">diesel fuel</a> produces <a href="/wiki/Soot" title="Soot">soot</a> (<a href="/wiki/Black_carbon" title="Black carbon">black carbon</a>) particles. These particles include tiny <a href="/wiki/Nanoparticles" class="mw-redirect" title="Nanoparticles">nanoparticles</a>—smaller than one micrometre (one micron). Soot and other particles from diesel engines worsen the <a href="/wiki/Particulate_matter" class="mw-redirect" title="Particulate matter">particulate matter</a> pollution in the air and are harmful to health.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> New particulate filters can capture from 30% to greater than 95% of the harmful soot.<sup id="cite_ref-barone_9-0" class="reference"><a href="#cite_note-barone-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> With an optimal diesel particulate filter (DPF), soot emissions may be decreased to <span class="nowrap"><span data-sort-value="6991099999999999999♠"></span>0.001 g/km</span> or less.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>The quality of the fuel also influences the formation of these particles. For example, a high sulphur content diesel produces more particles. Lower sulphur fuel produces fewer particles, and allows use of particulate filters. The injection pressure of diesel also influences the formation of fine particles. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=2" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Diesel particulate filtering was first considered in the 1970s due to concerns regarding the impacts of inhaled particulates.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> Particulate filters have been in use on <a href="/wiki/Non-road_machine" class="mw-redirect" title="Non-road machine">non-road machines</a> since 1980, and in automobiles since 1985.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Historically medium and heavy duty diesel engine emissions were not regulated until 1987 when the first California Heavy Truck rule was introduced capping particulate emissions at 0.60 g/BHP Hour.<sup id="cite_ref-bahadur_14-0" class="reference"><a href="#cite_note-bahadur-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Since then, progressively tighter standards have been introduced for light- and heavy-duty roadgoing diesel-powered vehicles and for off-road diesel engines. Similar regulations have also been adopted by the <a href="/wiki/European_Union" title="European Union">European Union</a> and some individual European countries, most Asian countries, and the rest of <a href="/wiki/North_America" title="North America">North</a> and <a href="/wiki/South_America" title="South America">South America</a>.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>Whilst few jurisdictions have explicitly made filters mandatory, the increasingly stringent emissions regulations that engine manufacturers must meet mean that eventually all on-road diesel engines will be fitted with them.<sup id="cite_ref-bahadur_14-1" class="reference"><a href="#cite_note-bahadur-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> In the European Union, filters are expected to be necessary to meet the Euro.VI heavy truck engine emissions regulations currently under discussion and planned for the 2012-2013 time frame. In 2000, in anticipation of the future <a href="/wiki/Euro_5" class="mw-redirect" title="Euro 5">Euro 5</a> regulations <a href="/wiki/PSA_Peugeot_Citro%C3%ABn" class="mw-redirect" title="PSA Peugeot Citroën">PSA Peugeot Citroën</a> became the first company to make filters standard on passenger cars.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p><p>As of December 2008, the <a href="/wiki/California_Air_Resources_Board" title="California Air Resources Board">California Air Resources Board</a> (CARB) established the <a href="/wiki/2008_California_Statewide_Truck_and_Bus_Rule" title="2008 California Statewide Truck and Bus Rule">2008 California Statewide Truck and Bus Rule</a> which—with variance according to vehicle type, size and usage—requires that on-road diesel heavy trucks and buses in California be retrofitted, repowered, or replaced to reduce particulate matter (PM) emissions by at least 85%. Retrofitting the engines with CARB-approved diesel particulate filters is one way to fulfill this requirement.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> In 2009 the <i>American Recovery and Reinvestment Act</i> provided funding to assist owners in offsetting the cost of diesel retrofits for their vehicles.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> Other jurisdictions have also launched retrofit programs, including: </p> <ul><li>2001 – <a href="/wiki/Hong_Kong" title="Hong Kong">Hong Kong</a> retrofit program.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup></li> <li>2002 – In <a href="/wiki/Japan" title="Japan">Japan</a> the <a href="/wiki/Tokyo" title="Tokyo">Prefecture of Tokyo</a> passed a law banning trucks without filters from entering the city limits.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup></li> <li>2003 – <a href="/wiki/Mexico_City" title="Mexico City">Mexico City</a> started a program to retrofit trucks.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup></li> <li>2004 – <a href="/wiki/New_York_City" title="New York City">New York City</a> retrofit program (non-road).<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup></li> <li>2008 – <a href="/wiki/Milan" title="Milan">Milan</a> <a href="/wiki/Ecopass" title="Ecopass">Ecopass</a> area <a href="/wiki/Road_pricing" title="Road pricing">traffic charge</a> – a hefty entrance tax on all diesel vehicles except those with a particulate filter, either stock or retrofit.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup></li> <li>2008 – <a href="/wiki/London_low_emission_zone" title="London low emission zone">London low emission zone</a> charges vehicles that do not meet <a href="/wiki/Emission_standard" title="Emission standard">emission standards</a>, encouraging retrofit filters.<sup id="cite_ref-london_24-0" class="reference"><a href="#cite_note-london-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup></li></ul> <p>Inadequately maintained particulate filters on vehicles with diesel engines are prone to soot buildup, which can cause engine problems due to high back pressure.<sup id="cite_ref-hdt_4-1" class="reference"><a href="#cite_note-hdt-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>In 2018, the UK made changes to its MOT test requirements,<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> including tougher scrutiny of diesel cars. One requirement was to have a properly fitted and working DPF. Driving without a DPF could incur a £1000 fine.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Variants_of_DPFs">Variants of DPFs</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=3" title="Edit section: Variants of DPFs"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:7.8Isuzu7500.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/37/7.8Isuzu7500.jpg/220px-7.8Isuzu7500.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/37/7.8Isuzu7500.jpg/330px-7.8Isuzu7500.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/37/7.8Isuzu7500.jpg/440px-7.8Isuzu7500.jpg 2x" data-file-width="2816" data-file-height="2112" /></a><figcaption>Cordierite Diesel Particulate Filter on GM 7.8 Isuzu</figcaption></figure> <p>Unlike a <a href="/wiki/Catalytic_converter" title="Catalytic converter">catalytic converter</a> which is a flow-through device, a DPF retains bigger exhaust gas particles by forcing the gas to flow through the filter material before exiting;<sup id="cite_ref-ax_2-1" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> however, the DPF does not retain small particles. Maintenance-free DPFs oxidise or burn larger particles until they are small enough to pass through the filter, though often particles "clump" together in the DPF reducing the overall particle count as well as overall mass.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> There are a variety of diesel particulate filter technologies on the market. Each is designed around similar requirements: </p> <ol><li>Fine filtration</li> <li>Minimum <a href="/wiki/Pressure_drop" title="Pressure drop">pressure drop</a></li> <li>Low cost</li> <li>Mass production suitability</li> <li>Product durability</li></ol> <div class="mw-heading mw-heading3"><h3 id="Cordierite_wall_flow_filters">Cordierite wall flow filters</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=4" title="Edit section: Cordierite wall flow filters"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The most common filter is made of <a href="/wiki/Cordierite" title="Cordierite">cordierite</a> (a ceramic material that is also used as catalytic converter supports (cores)). Cordierite filters provide excellent filtration efficiency, are relatively inexpensive, and have thermal properties that make packaging them for installation in the vehicle simple. The major drawback is that cordierite has a relatively low <a href="/wiki/Melting_point" title="Melting point">melting point</a> (about 1200 °C) and cordierite substrates have been known to melt during filter regeneration. This is mostly an issue if the filter has become loaded more heavily than usual, and is more of an issue with passive systems than with active systems, unless there is a system breakdown.<sup id="cite_ref-ax_2-2" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> </p><p>Cordierite filter cores look like catalytic converter cores that have had alternate channels plugged – the plugs force the exhaust gas flow through the wall and the particulate collects on the inlet face.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Silicon_carbide_wall_flow_filters">Silicon carbide wall flow filters</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=5" title="Edit section: Silicon carbide wall flow filters"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The second most popular filter material is <a href="/wiki/Silicon_carbide" title="Silicon carbide">silicon carbide</a>, or <a href="/wiki/SiC" class="mw-redirect" title="SiC">SiC</a>. It has a higher (2700 °C) melting point than cordierite, however, it is not as stable thermally, making packaging an issue. Small SiC cores are made of single pieces, while larger cores are made in segments, which are separated by a special cement so that heat expansion of the core will be taken up by the cement, and not the package. SiC cores are usually more expensive than cordierite cores, however they are manufactured in similar sizes, and one can often be used to replace the other. Silicon carbide filter cores also look like catalytic converter cores that have had alternate channels plugged – again the plugs force the exhaust gas flow through the wall and the particulate collects on the inlet face.<sup id="cite_ref-ax_2-3" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-sil_34-0" class="reference"><a href="#cite_note-sil-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> </p><p>The characteristics of the wall flow diesel particulate filter substrate are: </p> <ul><li>broad band filtration (the diameters of the filtered particles are 0.2–150 μm)</li> <li>high filtration efficiency (can be up to 95%)</li> <li>high refractory</li> <li>high mechanical properties</li> <li>high boiling point.<sup id="cite_ref-sil_34-1" class="reference"><a href="#cite_note-sil-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="Ceramic_fiber_filters">Ceramic fiber filters</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=6" title="Edit section: Ceramic fiber filters"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Fibrous ceramic filters are made from several different types of ceramic fibers that are mixed together to form a porous medium. This medium can be formed into almost any shape and can be customized to suit various applications. The porosity can be controlled in order to produce high flow, lower efficiency or high efficiency lower volume filtration. Fibrous filters have an advantage over wall flow design of producing lower back pressure. Fibrous ceramic filters remove carbon particulates almost completely, including fine particulates less than 100 nanometres (nm) diameter with an efficiency of greater than 95% in mass and greater than 99% in number of particles over a wide range of engine operating conditions. Since the continuous flow of soot into the filter would eventually block it, it is necessary to 'regenerate' the filtration properties of the filter by burning off the collected particulate on a regular basis. Soot particulate burn-off forms water and CO<sub>2</sub> in small quantities amounting to less than 0.05% of the CO<sub>2</sub> emitted by the engine.<sup id="cite_ref-ax_2-4" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Metal_fiber_flow-through_filters">Metal fiber flow-through filters</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=7" title="Edit section: Metal fiber flow-through filters"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some cores are made from metal fibers – generally the fibers are "woven" into a monolith. Such cores have the advantage that an electrical current can be passed through the monolith to heat the core for regeneration purposes, allowing the filter to regenerate at low exhaust temperatures and/or low exhaust flow rates. Metal fiber cores tend to be more expensive than cordierite or silicon carbide cores, and are generally not interchangeable with them because of the electrical requirement.<sup id="cite_ref-ax_2-5" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Paper">Paper</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=8" title="Edit section: Paper"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Disposable paper cores are used in certain specialty applications, without a regeneration strategy. <a href="/wiki/Coal_mine" class="mw-redirect" title="Coal mine">Coal mines</a> are common users – the exhaust gas is usually first passed through a water trap to cool it, and then through the filter.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> Paper filters are also used when a diesel machine must be used indoors for short periods of time, such as on a forklift being used to install equipment inside a store.<sup id="cite_ref-ax_2-6" class="reference"><a href="#cite_note-ax-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Partial_filters">Partial filters</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=9" title="Edit section: Partial filters"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are a variety of devices that produce over 50% particulate matter filtration, but less than 85%. Partial filters come in a variety of materials. The only commonality between them is that they produce more back pressure than a catalytic converter, and less than a diesel particulate filter. Partial filter technology is popular for retrofit.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Maintenance">Maintenance</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=10" title="Edit section: Maintenance"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Filters require more maintenance than catalytic converters. Soot, a byproduct of oil consumption from normal engine operation, builds up in the filter as it cannot be converted into a gas and pass through the walls of the filter.<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> This increases the pressure before the filter.<sup id="cite_ref-hdt_4-2" class="reference"><a href="#cite_note-hdt-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>DPF filters go through a regeneration process which removes this soot and lowers the filter pressure. There are three types of regeneration: passive, active, and forced. Passive regeneration takes place normally while driving, when engine load and vehicle drive-cycle create temperatures that are high enough to regenerate the soot buildup on the DPF walls. Active regeneration happens while the vehicle is in use, when low engine load and lower exhaust gas temperatures inhibit the naturally occurring passive regeneration. Sensors upstream and downstream of the DPF (or a differential pressure sensor) provide readings that initiate a metered addition of fuel into the exhaust stream. There are two methods to inject fuel, either downstream injection directly into the exhaust stream, downstream of the turbo, or fuel injection into the engine cylinders on the exhaust stroke. This fuel and exhaust gas mixture passes through the Diesel Oxidation Catalyst (DOC) creating temperatures high enough to burn off the accumulated soot. Once the pressure drop across the DPF lowers to a calculated value, the process ends, until the soot accumulation builds up again. This works well for vehicles that drive longer distances with few stops compared to those that perform short trips with many starts and stops. If the filter develops too much pressure then the last type of regeneration must be used – a forced regeneration. This can be accomplished in two ways. The vehicle operator can initiate the regeneration via a dashboard mounted switch. Various signal interlocks, such as park brake applied, transmission in neutral, engine coolant temperature, and an absence of engine related fault codes are required (vary by OEM and application) for this process to initiate. When the soot accumulation reaches a level that is potentially damaging to the engine or the exhaust system, the solution involves a garage using a computer program to run a regeneration of the DPF manually. </p><p>When a regeneration occurs, the soot is turned to gasses and ash of which some remains in the filter. This will increase restriction through the filter and can result in a blockage. Warnings are given to the driver before filter restriction causes an issue with driveability or damage to the engine or filter develop. Regular filter maintenance is a necessity to remove ash build up, either through cleaning or replacement of the filter. </p><p>Regeneration typically requires the vehicle to be driven continuously at 50-60mph (80-100km/h) for 30 to 45 minutes every few hundred miles/kilometers of city driving.<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Ford_Super_Duty" title="Ford Super Duty">Heavy duty pickup trucks</a> have less stringent requirements for all three parameters, and <a href="/wiki/Tractor_unit" title="Tractor unit">Class 8 trucks</a> significantly less.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> If the vehicle is often driven in cities the DPF may become clogged, causing a reduction in power and acceleration either passively due to increased exhaust pressure or actively due to vehicle going into "limp/turtle mode" as it tries to prevent engine and <a href="/wiki/Turbocharger" title="Turbocharger">turbo</a> damage.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> Once clogged both passive and active regeneration may become ineffective. DPF may be unclogged by high temperature <a href="/wiki/Pressure_washing" title="Pressure washing">pressure washing</a> (not officially recommended) and/or <a href="/wiki/Thermal_cleaning#Burn-off_ovens" title="Thermal cleaning">burn-off oven</a>.<sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">[</span>46<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Safety">Safety</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=11" title="Edit section: Safety"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 2011, Ford recalled 37,400 F-Series trucks with diesel engines after fuel and oil leaks caused fires in the diesel particulate filters of the trucks. No injuries occurred before the recall, though one grass fire was started.<sup id="cite_ref-47" class="reference"><a href="#cite_note-47"><span class="cite-bracket">[</span>47<span class="cite-bracket">]</span></a></sup> A similar recall was issued for 2005-2007 Jaguar S-Type and XJ diesels, where large amounts of soot became trapped in the DPF In affected vehicles, smoke and fire emanated from the vehicle underside, accompanied by flames from the rear of the exhaust. The heat from the fire could cause heating through the transmission tunnel to the interior, melting interior components and potentially causing interior fires.<sup id="cite_ref-48" class="reference"><a href="#cite_note-48"><span class="cite-bracket">[</span>48<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Regeneration">Regeneration</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=12" title="Edit section: Regeneration"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Dosierpumpe.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Dosierpumpe.png/220px-Dosierpumpe.png" decoding="async" width="220" height="75" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/6/63/Dosierpumpe.png 1.5x" data-file-width="293" data-file-height="100" /></a><figcaption>Metering pump for Diesel or additive injection, 3 L/h at 5 bar</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Diesel_particulate_filter.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Diesel_particulate_filter.png/220px-Diesel_particulate_filter.png" decoding="async" width="220" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Diesel_particulate_filter.png/330px-Diesel_particulate_filter.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/92/Diesel_particulate_filter.png/440px-Diesel_particulate_filter.png 2x" data-file-width="1264" data-file-height="576" /></a><figcaption>Diagram of the regeneration</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Hino_Standardized_SCR_Unit.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Hino_Standardized_SCR_Unit.jpg/220px-Hino_Standardized_SCR_Unit.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Hino_Standardized_SCR_Unit.jpg/330px-Hino_Standardized_SCR_Unit.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Hino_Standardized_SCR_Unit.jpg/440px-Hino_Standardized_SCR_Unit.jpg 2x" data-file-width="3264" data-file-height="2448" /></a><figcaption><a href="/wiki/Hino_Motors" title="Hino Motors">Hino truck</a> and its <a href="/wiki/Selective_catalytic_reduction" title="Selective catalytic reduction">selective catalytic reduction</a> (SCR) next to the DPF with regeneration process by the late fuel injection to control exhaust temperature to burn off soot.<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">[</span>49<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">[</span>50<span class="cite-bracket">]</span></a></sup></figcaption></figure> <p>Regeneration is the process of burning off (oxidizing) the accumulated soot from the filter. This is done either passively (from the engine's exhaust heat in normal operation or by adding a catalyst to the filter) or actively introducing very high heat into the exhaust system. On-board active filter management can use a variety of strategies:<sup id="cite_ref-barone_9-1" class="reference"><a href="#cite_note-barone-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <ol><li>Engine management to increase exhaust temperature through late fuel injection or injection during the exhaust stroke</li> <li>Use of a fuel-borne catalyst to reduce soot burn-out temperature</li> <li>A fuel burner after the turbo to increase the exhaust temperature</li> <li>A catalytic oxidizer to increase the exhaust temperature, with after injection (HC-Doser)</li> <li>Resistive heating coils to increase the exhaust temperature</li> <li><a href="/wiki/Microwave_energy" class="mw-redirect" title="Microwave energy">Microwave energy</a> to increase the particulate temperature</li></ol> <p>All on-board active systems use extra fuel, whether through burning to heat the DPF, or providing extra power to the DPF's electrical system, although the use of a fuel borne catalyst reduces the energy required very significantly. Typically a computer monitors one or more sensors that measure back pressure and/or temperature, and based on pre-programmed set points the computer makes decisions on when to activate the regeneration cycle. The additional fuel can be supplied by a <a href="/wiki/Metering_pump" title="Metering pump">metering pump</a>. Running the cycle too often while keeping the back pressure in the exhaust system low will result in high fuel consumption. Not running the regeneration cycle soon enough increases the risk of engine damage and/or uncontrolled regeneration (<a href="/wiki/Thermal_runaway" title="Thermal runaway">thermal runaway</a>) and possible DPF failure. </p><p>Diesel particulate matter burns when temperatures above 600 °C are attained. This temperature can be reduced to somewhere in the range of 350 to 450 °C by use of a fuel-borne catalyst. The actual temperature of soot burn-out will depend on the chemistry employed. In the mid-2010s, scientists at <a href="/wiki/3M" title="3M">3M</a> developed a magnesium <a href="/wiki/Dopant" title="Dopant">doped</a> version of traditional iron based catalysts which lowered the temperature required for particulate matter oxidation to just over 200 °C. The lower reaction temperature is made possible by the dopant allowing the Fe lattice to hold more oxygen.<sup id="cite_ref-:0_51-0" class="reference"><a href="#cite_note-:0-51"><span class="cite-bracket">[</span>51<span class="cite-bracket">]</span></a></sup> This advancement is significant because it allows the cleaning reaction to take place at the standard operating temperature of most diesel engines, removing the requirement for burning extra fuel or otherwise artificially heating the engine. The family of <a href="/wiki/Magnesium" title="Magnesium">Mg</a> doped catalysts, named Grindstaff catalysts after the chemist who started the work, has been the subject of much investigation across industry and academia with the tightening of emissions regulations on particulate matter world wide.<sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">[</span>52<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:0_51-1" class="reference"><a href="#cite_note-:0-51"><span class="cite-bracket">[</span>51<span class="cite-bracket">]</span></a></sup> </p><p>In some cases, in the absence of a fuel-borne catalyst, the combustion of the particulate matter can raise temperatures so high, that they are above the structural integrity threshold of the filter material, which can cause catastrophic failure of the substrate. Various strategies have been developed to limit this possibility. Note that unlike a spark-ignited engine, which typically has less than 0.5% oxygen in the exhaust gas stream before the emission control device(s), diesel engines have a very high ratio of oxygen available. While the amount of available oxygen makes fast regeneration of a filter possible, it also contributes to runaway regeneration problems. </p><p>Some applications use off-board regeneration. Off-board regeneration requires operator intervention (i.e. the machine is either plugged into a wall/floor mounted regeneration station, or the filter is removed from the machine and placed in the regeneration station). Off-board regeneration is not suitable for on-road vehicles, except in situations where the vehicles are parked in a central depot when not in use. Off-board regeneration is mainly used in industrial and mining applications. Coal mines (with the attendant explosion risk from coal damp) use off-board regeneration if non-disposable filters are installed, with the regeneration stations sited in an area where non-permissible machinery is allowed. </p><p>Many <a href="/wiki/Forklift" title="Forklift">forklifts</a> may also use off-board regeneration – typically mining machinery and other machinery that spend their operational lives in one location, which makes having a stationary regeneration station practical. In situations where the filter is physically removed from the machine for regeneration there is also the advantage of being able to inspect the filter core on a daily basis (DPF cores for non-road applications are typically sized to be usable for one shift – so regeneration is a daily occurrence).<sup id="cite_ref-53" class="reference"><a href="#cite_note-53"><span class="cite-bracket">[</span>53<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Removal_or_tampering">Removal or tampering</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=13" title="Edit section: Removal or tampering"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Intentionally removing or tampering with a DPF device, known as variously as "deleting", "defeating" or "tuning", is prohibited by the <a href="/wiki/United_States_Environmental_Protection_Agency" title="United States Environmental Protection Agency">EPA</a>. Several manufacturers and retailers of diesel emissions defeat devices have been fined up to $1 million dollars.<sup id="cite_ref-54" class="reference"><a href="#cite_note-54"><span class="cite-bracket">[</span>54<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=14" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Air_pollution" title="Air pollution">Air pollution</a></li> <li><a href="/wiki/Selective_catalytic_reduction" title="Selective catalytic reduction">Selective catalytic reduction</a></li> <li><a href="/wiki/Smog" title="Smog">Smog</a></li> <li><a href="/wiki/Ultra-low-sulfur_diesel" title="Ultra-low-sulfur diesel">Ultra-low-sulfur diesel</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Diesel_particulate_filter&action=edit&section=15" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-nash-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-nash_1-0">^</a></b></span> <span class="reference-text">Tom Nash (May 2003) "Diesels: The Smoke is clearing", <i>Motor </i> Vol.199 No. 5, p. 54, Hearst Business Publishing Inc.</span> </li> <li id="cite_note-ax-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-ax_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ax_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-ax_2-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-ax_2-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-ax_2-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-ax_2-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-ax_2-6"><sup><i><b>g</b></i></sup></a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.axces.eu/index.php?option=com_content&view=article&id=317:dpf-info&catid=140&Itemid=589">Emission Technology: DPF - Diesel Particulate Filters, Axces.eu</a></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">Jong Hun Kim <i>et al.</i> (November 2010) "NO2-Assisted Soot Regeneration Behavior in a Diesel Particulate Filter with Heavy-Duty Diesel Exhaust Gases", <i>Numerical Heat Transfer</i> Part A Vol.58 No.9 pp.725–739, <a href="/wiki/Chonbuk_National_University" class="mw-redirect" title="Chonbuk National University">Chonbuk National University</a>, Korea <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output 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a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output 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Retrieved <span class="nowrap">30 July</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+DPR+Future&rft.pub=Hino+Motors&rft_id=http%3A%2F%2Fwww.hino.com%2Fdownload%2F86%2Ffile%2FHino_DPR.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADiesel+particulate+filter" class="Z3988"></span></span> </li> <li id="cite_note-:0-51"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_51-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_51-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLiuWuSunJi2021" class="citation journal cs1">Liu, Junheng; Wu, Pengcheng; Sun, Ping; Ji, Qian; Zhang, Qi; Wang, Pan (2021-04-15). <a rel="nofollow" class="external text" href="https://www.sciencedirect.com/science/article/pii/S0016236120330933">"Effects of iron-based fuel borne catalyst addition on combustion, in-cylinder soot distribution and exhaust emission characteristics in a common-rail diesel engine"</a>. <i>Fuel</i>. <b>290</b>: 120096. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.fuel.2020.120096">10.1016/j.fuel.2020.120096</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0016-2361">0016-2361</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:232874439">232874439</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Fuel&rft.atitle=Effects+of+iron-based+fuel+borne+catalyst+addition+on+combustion%2C+in-cylinder+soot+distribution+and+exhaust+emission+characteristics+in+a+common-rail+diesel+engine&rft.volume=290&rft.pages=120096&rft.date=2021-04-15&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A232874439%23id-name%3DS2CID&rft.issn=0016-2361&rft_id=info%3Adoi%2F10.1016%2Fj.fuel.2020.120096&rft.aulast=Liu&rft.aufirst=Junheng&rft.au=Wu%2C+Pengcheng&rft.au=Sun%2C+Ping&rft.au=Ji%2C+Qian&rft.au=Zhang%2C+Qi&rft.au=Wang%2C+Pan&rft_id=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0016236120330933&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADiesel+particulate+filter" class="Z3988"></span></span> </li> <li id="cite_note-52"><span class="mw-cite-backlink"><b><a href="#cite_ref-52">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSongWangBoehman2006" class="citation journal cs1">Song, Juhun; Wang, Jinguo; Boehman, André L. (2006-07-01). <a rel="nofollow" class="external text" href="https://www.sciencedirect.com/science/article/pii/S0010218006001143">"The role of fuel-borne catalyst in diesel particulate oxidation behavior"</a>. <i>Combustion and Flame</i>. <b>146</b> (1): 73–84. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.combustflame.2006.03.012">10.1016/j.combustflame.2006.03.012</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0010-2180">0010-2180</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Combustion+and+Flame&rft.atitle=The+role+of+fuel-borne+catalyst+in+diesel+particulate+oxidation+behavior&rft.volume=146&rft.issue=1&rft.pages=73-84&rft.date=2006-07-01&rft_id=info%3Adoi%2F10.1016%2Fj.combustflame.2006.03.012&rft.issn=0010-2180&rft.aulast=Song&rft.aufirst=Juhun&rft.au=Wang%2C+Jinguo&rft.au=Boehman%2C+Andr%C3%A9+L.&rft_id=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0010218006001143&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADiesel+particulate+filter" class="Z3988"></span></span> </li> <li id="cite_note-53"><span class="mw-cite-backlink"><b><a href="#cite_ref-53">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.deep.org/reports/stobiedpf.pdf">Bruce R. Conrad</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20060902003048/http://www.deep.org/reports/stobiedpf.pdf">Archived</a> 2006-09-02 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>, "Diesel Emissions Evaluation Program - INCO" Diesel Emissions Evaluation Program Website (May 2006)</span> </li> <li id="cite_note-54"><span class="mw-cite-backlink"><b><a href="#cite_ref-54">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external free" href="https://www.thedrive.com/news/sketchy-diesel-tuning-black-market-forming-as-us-shops-stop-deleting-trucks">https://www.thedrive.com/news/sketchy-diesel-tuning-black-market-forming-as-us-shops-stop-deleting-trucks</a></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a 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/> rotating assembly</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Balance_shaft" title="Balance shaft">Balance shaft</a></li> <li><a href="/wiki/Block_heater" title="Block heater">Block heater</a></li> <li><a href="/wiki/Bore_(engine)" title="Bore (engine)">Bore</a></li> <li><a href="/wiki/Connecting_rod" title="Connecting rod">Connecting rod</a></li> <li><a href="/wiki/Crankcase" title="Crankcase">Crankcase</a></li> <li><a href="/wiki/Crankcase_ventilation_system" title="Crankcase ventilation system">Crankcase ventilation system (PCV valve)</a></li> <li><a href="/wiki/Crankpin" title="Crankpin">Crankpin</a></li> <li><a href="/wiki/Crankshaft" title="Crankshaft">Crankshaft</a></li> <li><a href="/wiki/Core_plug" title="Core plug">Core plug (freeze plug)</a></li> <li><a href="/wiki/Cylinder_(engine)" title="Cylinder (engine)">Cylinder</a> (<a href="/wiki/Cylinder_bank" class="mw-redirect" title="Cylinder bank">bank</a>, <a href="/wiki/Engine_configuration" title="Engine configuration">layout</a>)</li> <li><a href="/wiki/Engine_displacement" title="Engine displacement">Displacement</a></li> <li><a href="/wiki/Flywheel" title="Flywheel">Flywheel</a></li> <li><a href="/wiki/Firing_order" title="Firing order">Firing order</a></li> <li><a href="/wiki/Stroke_(engine)" title="Stroke (engine)">Stroke</a></li> <li><a href="/wiki/Main_bearing" title="Main bearing">Main bearing</a></li> <li><a href="/wiki/Piston" title="Piston">Piston</a></li> <li><a href="/wiki/Piston_ring" title="Piston ring">Piston ring</a></li> <li><a href="/wiki/Starter_ring_gear" title="Starter ring gear">Starter ring gear</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Valvetrain" title="Valvetrain">Valvetrain</a> and<br /> <a href="/wiki/Cylinder_head" title="Cylinder head">Cylinder head</a></th><td class="navbox-list-with-group 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href="/wiki/Timing_belt_(camshaft)" title="Timing belt (camshaft)">Timing belt</a></li> <li><a href="/wiki/Poppet_valve" title="Poppet valve">Valve</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Forced_induction" title="Forced induction">Forced induction</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blowoff_valve" title="Blowoff valve">Blowoff valve</a></li> <li><a href="/wiki/Boost_controller" title="Boost controller">Boost controller</a></li> <li><a href="/wiki/Intercooler" title="Intercooler">Intercooler</a></li> <li><a href="/wiki/Supercharger" title="Supercharger">Supercharger</a></li> <li><a href="/wiki/Turbocharger" title="Turbocharger">Turbocharger</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Fuel system</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diesel_engine" title="Diesel engine">Diesel engine</a></li> <li><a href="/wiki/Petrol_engine" title="Petrol engine">Petrol engine</a></li> <li><a href="/wiki/Carburetor" title="Carburetor">Carburetor</a></li> <li><a href="/wiki/Fuel_filter" title="Fuel filter">Fuel filter</a></li> <li><a href="/wiki/Fuel_injection" title="Fuel injection">Fuel injection</a></li> <li><a href="/wiki/Fuel_pump" title="Fuel pump">Fuel pump</a></li> <li><a href="/wiki/Fuel_tank" title="Fuel tank">Fuel tank</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Ignition_system" title="Ignition system">Ignition</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ignition_magneto" title="Ignition magneto">Magneto</a></li> <li><a href="/wiki/Compression_ignition" class="mw-redirect" title="Compression ignition">Compression ignition</a></li> <li><a href="/wiki/Coil-on-plug_ignition" class="mw-redirect" title="Coil-on-plug ignition">Coil-on-plug</a></li> <li><a href="/wiki/Distributor" title="Distributor">Distributor</a></li> <li><a href="/wiki/Glow_plug_(diesel_engine)" class="mw-redirect" title="Glow plug (diesel engine)">Glow plug</a></li> <li><a href="/wiki/Ignition_coil" title="Ignition coil">Ignition coil</a></li> <li><a href="/wiki/Spark_plug" title="Spark plug">Spark plug</a></li> <li><a href="/wiki/Spark_plug_wires" title="Spark plug wires">Spark plug wires</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Engine management</div></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Engine_control_unit" title="Engine control unit">Engine control unit (ECU)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Electrical system</div></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alternator_(automotive)" title="Alternator (automotive)">Alternator</a></li> <li><a href="/wiki/Automotive_battery" title="Automotive battery">Battery</a></li> <li><a href="/wiki/Dynamo" title="Dynamo">Dynamo</a></li> <li><a href="/wiki/Starter_(engine)" title="Starter (engine)">Starter motor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Intake system</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Airbox" title="Airbox">Airbox</a></li> <li><a href="/wiki/Air_filter#Internal_combustion_engine_air_filters" title="Air filter">Air filter</a></li> <li><a href="/wiki/Idle_air_control_actuator" title="Idle air control actuator">Idle air control actuator</a></li> <li><a href="/wiki/Inlet_manifold" title="Inlet manifold">Inlet manifold</a></li> <li><a href="/wiki/MAP_sensor" title="MAP sensor">MAP sensor</a></li> <li><a href="/wiki/Mass_flow_sensor" title="Mass flow sensor">MAF sensor</a></li> <li><a href="/wiki/Throttle" title="Throttle">Throttle</a></li> <li><a href="/wiki/Throttle_position_sensor" title="Throttle position sensor">Throttle position sensor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Exhaust_system" title="Exhaust system">Exhaust system</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Catalytic_converter" title="Catalytic converter">Catalytic converter</a></li> <li><a class="mw-selflink selflink">Diesel particulate filter</a></li> <li><a href="/wiki/Exhaust_gas_temperature_gauge" title="Exhaust gas temperature gauge">EGT sensor</a></li> <li><a href="/wiki/Exhaust_manifold" title="Exhaust manifold">Exhaust manifold</a></li> <li><a href="/wiki/Muffler" title="Muffler">Muffler</a></li> <li><a href="/wiki/Oxygen_sensor#Automotive_applications" title="Oxygen sensor">Oxygen sensor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Internal_combustion_engine_cooling" title="Internal combustion engine cooling">Cooling system</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air_cooling" title="Air cooling">Air cooling</a></li> <li><a href="/wiki/Water_cooling" title="Water cooling">Water cooling</a></li></ul> <ul><li><a href="/wiki/Fan_(machine)" title="Fan (machine)">Electric fan</a></li> <li><a href="/wiki/Radiator_(engine_cooling)" title="Radiator (engine cooling)">Radiator</a></li> <li><a href="/wiki/Thermostat" title="Thermostat">Thermostat</a></li> <li><a href="/wiki/Fan_clutch" title="Fan clutch">Viscous fan (fan clutch)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lubrication</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Motor_oil" title="Motor oil">Oil</a></li> <li><a href="/wiki/Oil_filter" title="Oil filter">Oil filter</a></li> <li><a href="/wiki/Oil_pump_(internal_combustion_engine)" title="Oil pump (internal combustion engine)">Oil pump</a></li> <li><a href="/wiki/Sump" title="Sump">Sump</a> (<a href="/wiki/Wet_sump" title="Wet sump">Wet sump</a>, <a href="/wiki/Dry_sump" title="Dry sump">Dry sump</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Engine_knocking" title="Engine knocking">Knocking / pinging</a></li> <li><a href="/wiki/Power_band" title="Power band">Power band</a></li> <li><a href="/wiki/Redline" title="Redline">Redline</a></li> <li><a href="/wiki/Stratified_charge_engine" title="Stratified charge engine">Stratified charge</a></li> <li><a href="/wiki/Dead_centre_(engineering)" title="Dead centre (engineering)">Top dead centre</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2" style="font-weight:bold;"><div> <ul><li><a href="/wiki/Portal:Cars" title="Portal:Cars">Portal</a></li> <li><a href="/wiki/Category:Cars" title="Category:Cars">Category</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div 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