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1.缸套与活塞之间间隙过大时产生的异响缸套活塞间的间隙过大时产生像厚铁板砸大铁钻的“哒、哒”声。刚起动时和怠速工况时敲击声清晰,热车后减弱或消失;猛加油门时响声加快,但声响加重不明显;突然停止供油时敲击声减弱或消失。为进一步确诊,可采取以下方法试探:发动机熄火冷却后,通过喷油器安装孔向气缸内加入少量机油,摇转曲轴,让机油均布到活塞与缸套的间隙中,然后起动发动机,如果开始运转的半分钟内,异响声比以前大大减弱,就证实是缸套与活塞间的间隙过大。 2.活塞销与销座孔之间间隙过大时产生的异响此时产生像小手锤打铁钻的
1. When the gap between the cylinder liner and the piston is too large, the noise generated by the cylinder liner is too large. Just started and idling conditions percussion clear, hot car weakened or disappeared; fierce throttle acceleration, but the sound is not aggravating; sudden stop when the percussion sound weakened or disappeared. For further diagnosis, the following methods may be used to test: After the engine is turned off and cooled, a small amount of oil is added to the cylinder through the mounting hole of the injector, the crankshaft is cranked so that the oil is uniformly distributed in the gap between the piston and the cylinder liner, and then the engine is started. Within half a minute of starting to operate, the sound of an abnormal sound is much weaker than before, confirming that the clearance between the cylinder liner and the piston is too large. 2. Piston pin and pin hole when the gap between the abnormal noise generated at this time like hammering