对正时系统失效模式进行了分类,并把失效模式产生的内部因素和外部环境因素进行了详细识别,结合78个售后发动机正时系统的失效汇总,给出了正时系统中失效频率最高的零件、产生失效的最主要原因以及最常见的失效后果。锁定了张紧器和链条是正时系统中失效频率最高的零部件,异响是正时系统最常见的失效后果。 The failure modes of timing system are classified and the internal factors and external environment factors of failure mode are identified in detail. Combined with the failure summary of 78 post-sales engine timing systems, the failure frequency of the timing system is given Parts, the main cause of failure and the most common failure consequences. Locking the tensioner and the chain is the most failed part of the timing system, the most common failure of timing systems.