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造成发动机气门掉入气缸的主要原因是气门折断和气门锁夹脱落。气门折断是因活塞与气门碰撞所致。活塞与气门碰撞的原因主要有:气门间隙过小、气门导管折断、气门杆卡住、正时齿轮安装不当、轮轴与轴套间隙过大等。气门锁夹脱落主要是由于气门锁夹质地过软、发动机飞车、机手猛轰油门或气门弹簧折断等原因造成的。因此,为了预防气门掉入气缸,应做到以下几点:1.严格按技术要求检修配气机构的各个零部件,
The main reason that caused the engine valve to fall into the cylinder is that the valve is broken and the valve lock clam falls off. Valve is broken due to piston and valve collision. Pistons and valve collision mainly due to: valve clearance is too small, the valve guide broken, valve stem stuck, timing gear installed properly, the hub and sleeve clearance is too large. Valve lock clip off is mainly due to the soft texture of the valve lock clip, the engine speed, the hand throttle or valve spring break caused by such reasons. Therefore, in order to prevent valve fall into the cylinder, should do the following: 1. In strict accordance with the technical requirements of the maintenance of the various parts of the valve body,