2　工作机构的保养发动机工作机构经常在高温、高压和高速条件下工作 ,各运动零件极易磨损。如使用不当或保养不及时 ,就会加速零件的磨损 ,失去原有的几何尺寸和精度 ,使零件的配合间隙增大 ,导致发动机功率下降和油耗量增加 ,甚至造成机器过早地损坏。为了保证各工作机构的正 2 maintenance of the working organization Engine working institutions often work under conditions of high temperature, high pressure and high speed, all moving parts wear easily. Such as improper use or maintenance is not timely, it will speed up the wear and tear parts, loss of the original geometry and accuracy, so that parts with the gap increases, resulting in decreased engine power and fuel consumption, and even cause premature damage to the machine. In order to ensure that the working institutions are positive