HCCI's operating range is limited by an excessive rate of pressure rise during combustion and the resulting engine knock in high-load. The purpose of this study was to gain a better understanding of the effect of in-cylinder gas thermal stratification...
HCCI's operating range is limited by an excessive rate of pressure rise during combustion and the resulting engine knock in high-load. The purpose of this study was to gain a better understanding of the effect of in-cylinder gas thermal stratification for reducing the pressure-rise rate in HCCI combustion. The engine was fueled with Di-Methyl Ether. The computations were conducted using both the standard single-zone version and a custom multi-zones version of the Senkin application of the CHEMKIN Ⅱ. This study shows that the potential for extending the high-load operating limit by adjusting the thermal stratification is very large.