A Study of Cool Flame and Autoignition Behavior in an HCCI Engine by Using EGR

Abstract

Homogeneous Charge Compression Ignition (HCCI) combustion has attracted considerable interest as a new combustion concept for internal combustion engines in recent years because of their potential for high efficiency and clean combustion. However the HCCI combustion process has two issues to be resolved: ignition timing control, slower combustion. Authors focused attention on exhaust gas recirculation (EGR) to resolve these issues. In this study, the influence of EGR on ignition in an HCCI engine was investigated by using an actual engine and analysis of chemical reactions based on chemical kinetic simulations.