汽车发动机的使用寿命是由于其技术状况所决定,其中,气缸组技术状况中最重要的一项是气缸密封性。本文结合实际工作,就气缸密封性检测与故障诊断相关问题进行探讨,希望能为汽车修理工作提供一点参考。一、气缸密封性对发动机工作的影响要想保证发动机缸内压力正常并有足够的动力输出,首先应该保证气缸密封良好。汽车发动机密封结构主要包括气缸垫、气缸体、气缸盖、气门和活塞组等部件。气缸密封性差可导致汽车加速不良,发动机起动困难甚至不能起动,车辆爬坡能力下降,很难达到最高车速,同时,出现排烟增多且有异常气味,燃油与机油消耗 The service life of a car engine is due to its technical condition, of which the most important one is the cylinder seal. In this paper, the practical work on the cylinder sealing test and fault diagnosis related issues are discussed, hoping to provide a little reference for the car repair work. First, the cylinder seal on the work of the engine In order to ensure normal pressure in the engine cylinder and have enough power output, first of all should ensure that the cylinder seal is good. Automotive engine seal structure, including cylinder pads, cylinder block, cylinder head, valve and piston assembly and other components. Poor cylinder sealing can lead to poor acceleration of the car, start the engine difficult or impossible to start, the ability to climb down the vehicle, it is difficult to reach the maximum speed, at the same time, there is an increase of exhaust smoke and abnormal odor, fuel and oil consumption