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柴油机工作时,在缸体的上中部发出清脆的金属敲击声或低钝哑的敲击声,称为“敲缸”故障。分析其原因:⑴供油时间太早,活塞距上止点还较远,柴油过早喷入燃油室后提早使气缸燃烧作功,继续上行的活塞与提早爆炸力迫使活塞下行的力相对抗,使发动机工作粗暴,发出清脆有节奏的金属敲击声,且常引起反转。⑵喷油器针阀磨损,或喷油器喷油压力太高,使供油量增多;喷油泵出油阀减压环带磨损,导致减压环带的减压作用失效;高压油管内剩余压力增高,造
Diesel engine work, in the middle of the cylinder issued crisp metal percussion or low blunt percussion, known as “Knocking cylinder ” failure. Analysis of the reasons: ⑴ fuel supply too early, the piston is still far away from the top dead center, diesel prematurely injected into the fuel tank after the cylinder combustion work, continue to advance the piston and the early explosive force to force the piston down the force against , Making the engine rough, sending a crisp, rhythmic metal percussion and often causing reversal. ⑵ injector needle wear, or injector injection pressure is too high, so that the fuel supply increased; fuel injection valve vacuum valve wear ring, resulting in pressure relief decompression ring failure; high-pressure tubing remaining Pressure increased, made