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Gasoline Two-Stroke HCCI Combustion Controlled by Residual Gas (Second Report)~Effect of Scavenging Pressure and Fuel Injection Timing
Published May 18, 2005 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
Gasoline two-stroke HCCI engine is forced to minimize short-circuiting loss of fuel and scavenging loss of external air blower for improving break thermal efficiency. 3D-CFD was employed in order to investigate effects of scavenging pressure, fuel injection piston and timing on mixture preparation. Analytical results lead the following information. In the case of low scavenging pressure, mixture maldistribution is produced although short-circuiting loss of fuel is reduced considerably by late fuel injection and optimum injection position. On the other hand, high scavenging pressure (greater than 40 kPa) produces leaner and more homogeneous mixture regardless of fuel injection timing.