一、故障现象1 发动机突然加速时 ,有明显、连续“、、”的响声。严重时伴有机体震动。2 响声随发动机转速提高而增加 ,随负荷的增大而增强 ,其部位在气缸的下部。3 用“断火”试验时 ,单缸“断火” ,一般异响变化不明显 ;两缸同时“断火” ,则声音变化比较大 ;相邻两缸 First, the failure phenomenon 1 engine suddenly accelerates, there is a clear, continuous “, , ” sound. Severe when accompanied by body vibration. 2 The noise increases as the engine speed increases, increases with load, and its part is at the lower part of the cylinder. 3 with “off fire” test, single cylinder “off fire”, the general change is not obvious abnormal sound; two cylinders at the same time, “off the fire,” the sound changes relatively large; adjacent cylinder