Abstract: in most degree，Excellent Automobile dynamical and economical performance often depends upon reasonable matching of it's engine and transmision．reasonable matching shall get the Excellent automobile dynamical and economical properties．in order to improve state of majority of autornobile's engines with the incorrect matching，in this paper，we regard transnfision's parameter as known quantity，to optimize parameter of the engine of which match with the transmission．The result indicates automobile dynamical and economical performance becomes good．

Key words: automobile, engine, transmission, matching

摘要： 汽车动力性、经济性的好坏很大程度上取决于汽车动力传动系统合理匹配的程度，发动机与传动系的合理匹 配将显著降低汽车的燃油消耗并可获得较好的动力性．为改善发动机与传动系参数匹配不当的现状，本文以传动 系参数给定，优选发动机参数为方向，对汽车动力传动系统进行了匹配研究．结果表明，通过优化匹配．汽车的动力 性、经济性均得到一定的提高．

关键词: 汽车, 动力, 传动系, 匹配