Simulation and Optimizing Research on Effects of Intake and Exhaust Event Angle on Gasoline Engine Performances

Abstract

For port fuel injection turbocharged gasoline engine, one dimensional model was established, and comparing research about effects of different intake and exhaust event angle on gasoline engine performances have been done by means of optimizing simulation. Bench testing was done to review the optimized results. The results show that the chamber and pipe model can both meet the accuracy requirements of calculation, and the chamber model has better accuracy. When operating at low speed, bigger intake event angle and smaller exhaust angle should be adopted, while at high speed, bigger exhaust event angle and suitable bigger intake event angle can be chosen to get improved economic and power performances. The engine speed, flow mass and cyclical residual gas are of significant factors which influence its performances.