发动机工作一段时间后，在燃烧室、进排气门、进排气歧管和排烟管内会因燃烧不完全而产生积炭，因漏油及油气蒸发而积留油垢以及冷却水腔中结有水垢。这些污物过多时，会使发动机性能下降、油耗增加、机温升高，破坏机件正常的配合间隙，加速零件磨损和腐蚀，甚至引发一些恶性? Engine work for a period of time, in the combustion chamber, into the exhaust valve, into the exhaust manifold and exhaust pipe due to incomplete combustion and produce coke, as a result of oil and gas evaporation and accumulation of grease and cooling water in the knot There is scale. When these contaminants are too high, engine performance will drop, fuel consumption increases, machine temperature increases, the normal part of the destruction of mechanical parts, accelerated wear and corrosion parts, and even lead to some vicious?