Effects of Initial Chemical Species Compositions on the Gasoline Compression Ignition Combustion Process

Abstract

The combustion characteristic timescale model by Kong et al. was applied to zero-dimensional chemical kinetics calculation with a detailed elementary reaction scheme in order to predict combustion processes under various operating conditions in a gasoline HCCI engine, and it has been shown that combustion processes as well as ignition timings can be predicted by means of this method. The effects of initial chemical species compositions on ignition timing were investigated by zero-dimensional chemical kinetics calculation, and the mechanism of ignition promotion due to CO was inferred on the basis of Kuwahara's contribution matrices.