国产大型柴油车用发动机,每行驶约10万km,一般将会出现起动困难、动力下降,燃油耗量增加,尾气污染严重等现象。其产生的主要原因有:a.气缸、活塞、及活塞环磨损严重;b.燃油系的柱塞偶件、出油阀偶件、喷油嘴的偶件磨损严重。这些部件的磨损都直接造成气缸内的压力降低,供油时间过迟、燃油的雾化变差,从而使发动机的起动性能,动力性能、经济性能下降,而且还会增加尾气对 Domestic large-scale diesel car engines, each driving about 100,000 km, the general will appear difficult to start, power drops, increased fuel consumption, serious exhaust pollution and so on. The main reasons for its existence are: a. Cylinder, piston, and piston ring wear serious; b. Fuel system of the plunger coupling, oil valve coupling parts, nozzle wear even serious. The wear and tear of these components are directly caused by the cylinder pressure is reduced, the fuel supply time is too late, the fuel atomization worse, so that the engine starting performance, power performance, economic performance decline, but also increase the exhaust on