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Effect of Spatial Distribution of In-Cylinder Temperature and Fuel Concentration on Performance of the Blow-Down Super Charge HCCI Gasoline Engine
Published October 07, 2009 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
To investigate the effect of the fuel distribution on the pressure rise rate of the BDSC-HCCI engine, a numerical simulation of the ignition and combustion of the BDSC-HCCI engine using a multi-zone combustion model was carried out. The simulation result showed that a uniform fuel distribution decreases the pressure rise rate with the temperature distribution generated by the BDSC system. The experiments were also carried out using a four-cylinder gasoline engine equipped with the direct fuel injector and the BDSC system. The fuel injection timing was varied as an experimental parameter to investigate the effect of the fuel distribution on the pressure rise rate. The results showed that the pressure rise rate was affected by the direct fuel injection timing, and that fuel injection at the end of the exhaust stroke decreased the pressure rise rate.