https://wikicars.org/index.php?action=history&feed=atom&title=Cetane_index 2026-04-24T21:08:45Z Revision history for this page on the wiki MediaWiki 1.38.4 https://wikicars.org/index.php?title=Cetane_index&diff=153739&oldid=prev 2010-05-20T16:01:48Z

<p><span dir="auto"><span class="autocomment">See also</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:01, 20 May 2010</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11">Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== See also ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== See also ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* [[Cetane]]</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Diesel fuel|Diesel]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Diesel fuel|Diesel]]</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Octane rating]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* [[Octane rating]]</div></td></tr> </table>

Red marquis https://wikicars.org/index.php?title=Cetane_index&diff=153738&oldid=prev 2010-05-20T16:01:23Z

<p></p> <p><b>New page</b></p><div>&#039;&#039;&#039;Cetane index&#039;&#039;&#039; is used as a substitute for the [[cetane number]] of [[diesel fuel]]. The cetane index is calculated based on the fuel&#039;s density and distillation range (ASTM D86). There are two methods used, ASTM D976 and D4737. The older D976, or &quot;two-variable equation&quot; is outdated and should no longer be used for cetane number estimation. It is, however, still required by the United States Environmental Protection Agency (EPA) as an alternative method for satisfying its aromaticity requirement for diesel fuel. D4737 is the newest method and is sometimes referred to as &quot;the four-variable equation&quot;. D4737 is the same method as ISO 4264. Cetane index in some crude oil assays is often referred to as Cetane calcule, while the cetane number is referred to as Cetane measure.<br /> <br /> ==Cetane improver additives==<br /> Cetane index calcuations can not account for cetane improver additives and therefore do not measure total cetane number for additized diesel fuels. Diesel engine operation is primarily related to the actual cetane number and the cetane index is simply an estimation of the base (unadditized) cetane number. Cetane number should equal or exceed cetane index, depending on the amount of additive used. The most common additive is 2-ethylhexyl nitrate (2EHN).<br /> <br /> == References ==<br /> <br /> * Internal Combustion Engine Fundamentals, John B. Heywood, McGraw Hill, 1988 ISBN 0-07-100499-8<br /> * Automotive Fuels Reference Book, Keith Owen, Trevor Coley SAE, 1995, ISBN 1-56091-589-7<br /> <br /> == See also ==<br /> <br /> * [[Cetane]]<br /> * [[Diesel fuel|Diesel]]<br /> * [[Octane rating]]<br /> <br /> == External links ==<br /> <br /> * [http://www.fuelmagic.net/Cetane%20Booster.html Cetane number determination]<br /> * [http://yarchive.net/car/cetane_number.html Article by Bruce Hamilton]<br /> * [http://www.bp.com/sectiongenericarticle.do?categoryId=4005623&amp;contentId=7009145 Explanation of Cetane from BP]<br /> * [http://www.med.govt.nz/templates/MultipageDocumentPage____10726.aspx#P734_32645 ASTM methods of calculating cetane index]<br /> <br /> [[Category:Petroleum]]</div>

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