影响发动机性能的因素及灵敏度分析

Analysis on the Factors Affected Engine Performance and Their Sensitivities

利用GT-POWER软件,建立发动机燃烧乙醇汽油工作过程模型,对影响发动机性能的主要参数进行模拟计算,基于模拟结果分析各参数对发动机性能的影响,确定发动机获得最佳性能时所对应的参数值。对点火提前角、进气门迟闭角及空燃比耦合作用下的发动机工作过程进行优化计算,并对这三个参数进行灵敏度分析。

The working process model of an engine fueled with ethanol-gasoline is established by using the software GT- POWER. The main parameters which affect the engine performances are simulated,the influences of the parameters are analyzed based on the simulated results and then to determine the parameters value when the optimal performance is obtained. An optimized calculation,which is carried out under the coupling influences of the spark angle,the intake valve close angle and the air-fuel ratio,is made. At last the sensitivity of each parameter is analyzed.