Definitions for "Cetane Index"
An empirical measure of ignition quality. Defined as the percentage by volume of cetane in a mixture of cetane and methyl naphthalene which has the same ignition quality when used in an engine as a fuel under test.
A valve of the ignition quality of a diesel fuel calculated from the fuel's properties.
A calculated value, derived from fuel density and volatility, giving a reasonably close approximation to cetane number.