A Study of Ignition and Combustion Control in an HCCI Engine by using Dual Fuels

Abstract

Homogeneous Charge Compression Ignition (HCCI) combustion has attracted considerable interest as a new combustion concept for internal combustion engines. The HCCI combustion process has three issues to be resolved: ignition timing control, slower combustion, expanding stable operation region. In this study, an attempt was made to overcome these issues by EGR and dual fuels. Light absorption spectroscopic measurement was made in the combustion chamber in order to investigate low-temperature reactions in detail. As a result, the ignition timing can be controlled and the rapidity of combustion can be lessened by using a fuel having two components with different ignition characteristics.