cetane number

cetane number
a measure of the ignition quality of a diesel engine fuel by comparison with various mixtures in which the alpha form of methylnaphthalene is given a standard value of 0 and cetane is given a standard value of 100. Also called cetane rating.
[1930-35]

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Universalium. 2010.

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  • cetane number — A method of rating diesel oil or fuel by measuring the time lapse between fuel injection and ignition to determine how easy it is to ignite and how fast it will burn. The lower the cetane number, the higher the temperature required to burn the… …   Dictionary of automotive terms

  • cetane number — noun Date: 1935 a measure of the ignition value of a diesel fuel that represents the percentage by volume of cetane in a mixture of liquid methylnaphthalene that gives the same ignition lag as the oil being tested called also cetane rating… …   New Collegiate Dictionary

  • cetane number — noun or cetane rating : a measure of the ignition value of a diesel fuel oil : the percentage by volume of cetane in a mixture of cetane and 1 methylnaphthalene that gives the same ignition lag as the oil being tested …   Useful english dictionary

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