轿车发动机机械损失的降低

Reduce Mechanical Loss of Car Engine

机械损失对现代车用发动机燃料经济性的影响很大。轿车发动机因为其经常在很小的负荷率下运行，故降低机械损失对改善其油耗和排放将有更大的效果。分析了轿车发动机基本参数、零部件设计等对摩擦损失的影响，提出了降低其机械损失的若干措施。

Influence of mechanical loss on fuel economy of modern motor vehicle engine is very big. As the car engine operates frequently with small load rate,to reduce the mechanical loss would improve more effectively the fuel consumption and exhaust emission. This paper analyses the influence of fundarnental parameters of car engine, design of components, etc. on the friction loss and puts forword some measures to reduce the mechanical loss.