一般通用型汽油机性能指标的考核是在标定功率工况点。而对其部分负荷时的性能不作考核,因此当汽油机运转工况点在部分负荷时,其动力性和经济性都较差,尤其是车用汽油机其大部分运转工况是在部分负荷时进行,因此改善其性能尤为必要。 General performance evaluation of general gasoline engine performance points in the calibration of the power point. While the partial load of its performance does not make assessment, so when the gasoline engine operating conditions at part load, its power and economy are poor, especially for most of the operating conditions of gasoline engines are carried out at part load , So improving their performance is especially necessary.