밸브오버랩기관과 양정변화가 엔진특성에 미치는 영향에 관한 연구

A study on the Valve Overlap Period and Valve Lift on the SI Engine Characteristics

In this study, a zero-dimensional two zone model is developed to investigate the effects of valve overlap period and valve lift on combustion and gas exchange process in SI engine. The simulation results show that the predicted data has good agreements with experimental ones. The useful information of combustion and gas exchange process such as residual gas fraction, cylinder pressure, mass flow rate and volumetric efficiency can be obtained and the effects of engine variables on combustion processes and performances can be evaluated.