经过优化后,采用缸内直接喷射分层燃烧的单缸发动机取得了良好的动力性、经济性和排放性能。经济性优于同一缸径的国产6缸化油器式汽油机。与同样采用缸内直接喷射的日本OSKA式燃烧系统相比,本系统的排放性能较优。以测得的缸内示功图为基础,对本系统的放热率及其它燃烧特性参数进行了分析。 After optimization, the single-cylinder engine with stratified combustion in-cylinder direct injection has achieved good power, economy and emission performance. Economy is better than the same cylinder made in China 6-cylinder carburetor gasoline engine. Compared with the Japanese OSKA combustion system, which also adopts direct injection in cylinder, the system has better emission performance. Based on the measured cylinder dynamometer, the heat release rate and other parameters of the combustion system were analyzed.