如何诊断发动机异常声响

How to diagnose abnormal sound of engine

论述了在无检测仪表和试验设备的情况下，寻找异响部位．区别异响类型的方法，分析异响规律，提出了诊断过程应注意的事项。

Expound under the circumstance of without inspection instrumenation and test equipment,searches for the abnormal sound position,method of distinguishing the type of abnormal sound,analyses the abnormal rules,puts forward do＇s and dont＇s during diagnose process.