Definition of Octane number and Cetane number

Sonu Kumar Singh Jul 5 2021 5:20PM

Octane Number - Octane number is defined as the percentage, by volume, of iso octane in the mixture of iso-octane and h-heptane. It is the measure of rating of SI engine.
Cetane Number - Cetane number is defined as the percentage, by volume, of n-cetane in the mixture of n-cetane and alpha methyl naphthalene. It is the measure of rating of CI engine.

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