活塞发生“敲缸”的实质是,活塞侧面敲击缸壁而产生的异响。这种响声随温度的变化而不同。其表现形式是:低温时基本正常,加速时敲缸严重;在低温或正常工作温度时均有敲缸异响,但低温时敲缸异响较轻,正常工作温度时敲缸异响较重;当某缸出现敲缸异响时,将该缸喷油器旋松后,其响声即减弱或消失;多缸发响时,其响声杂乱,一旦加大油门便发出快节奏噪声。 Piston “knock cylinder” in essence, the side of the piston knocked on the cylinder wall and the abnormal sound. This sound varies with temperature. Its manifestations are: low temperature is basically normal, serious knocking cylinder acceleration; knocking at the low temperature or normal operating temperature when the cylinder has abnormal sounding, but knocking the cylinder when the abnormal low noise, normal working temperature heavier knock knock cylinder, ; When a cylinder knocking abnormal sound, the cylinder injector loose, the sound that is weakened or disappeared; multi-cylinder sound, the noise messy, once the throttle will increase the fast-paced noise.