Homogenous Charge Compression Ignition Engine with a Pre-Chamber (Fundamental Characteristics of the Combustion)

Homogeneous charge compression ignition(HCCI) combustion is promising a new combustion system reducing NOx and PM simultaneously without any penalty of fuel consumption. However, the operational range of the HCCI combustion system is limited because of some issues such as poor control of ignition timing and the excessive rate of pressure rise. In this study, a new combustion system based on an HCCI combustion process will be proposed. The combustion system has a pre-chamber in the cylinder head. On the combustion system, at first, ignition takes place in the pre-chamber, and then the burned gas ejected into the main chamber ignite the mixture in the main chamber. In the combustion system, the combustion process in the main chamber is aimed to go on same manner of the HCCI combustion process. This paper presents the concept of the combustion system and test results of some experiments.