Abstract
Gasoline homogeneous charge compression ignition (HCCI) engines, in which a very lean homogeneous mixture is burned at a high compression ratio, can operate with a high thermal efficiency, and can reduce NOx emission. Therefore, the HCCI engine is a possible candidate as a next-generation engine. In this study, the authors newly proposed a reduced elementary reaction scheme for gasoline PRF, and simulated the ignition and combustion process and the combustion products in a gasoline HCCI engine by three-dimensional numerical analysis using the authors' GTT code, which was linked to the CHEMKIN subroutines with the proposed elementary reaction scheme. As a result, the ignition timing, the cylinder gas pressure, the rate of heat release, and the emissions of NO and CO2 at various air-fuel ratios and engine speeds were accurately predicted.
