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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
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D86). There are two methods used, ASTM D976 and D4737. The older D976, or "two-variable equation" is outdated and should no longer be used for cetane number estimation. It is, however, still required by the
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requirement for diesel fuel. D4737 is the newest method and is sometimes referred to as "the four-variable equation". D4737 is the same method as
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is often referred to as Cetane calcule, while the cetane number is referred to as Cetane measure.
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the amount of additive used. The most common additive is 2-ethylhexyl nitrate (2EHN).
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97:. The cetane index is calculated based on the fuel's
110:(EPA) as an alternative method for satisfying its
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108:United States Environmental Protection Agency
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74:Learn how and when to remove this message
167:Internal Combustion Engine Fundamentals
182:, Keith Owen, Trevor Coley SAE, 1995,
169:, John B. Heywood, McGraw Hill, 1988
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89:is used as a substitute for the
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180:Automotive Fuels Reference Book
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118:4264. Cetane index in some
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205:Article by Bruce Hamilton
132:cetane improver additives
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101:and distillation range (
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230:Petroleum production
31:list of references
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50:Please help
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220:Diesel fuel
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56:introducing
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161:General
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