可变排量发动机技术的发展

The development of variable displacement engine technique

可变排量发动机能够把稀薄燃烧、分层燃烧、节气门方式的各个优点集中于一身。可变排量方式能够按照负荷的变化改变发动机的排量,因而能够大幅度降低泵气损失,确保空燃比一定,所以能够高精度净化排放气体。

The variable displacement engine can concentrate all advantages in one, such as lean bum, stratified bum and throttle mode. The variable displacement mode can change displacement of engine in term of variety of load, thus pumping losses can be widely decreased, and NF is retained constantty. Therefore, exhaust emission could be cleaned precisely.