更换活塞环的时间判断贺吉范活塞环在高温高压高速条件下工作，且润滑条件较差，第一道气环尤为甚之。长期以来，活塞环一直是使用寿命最短的零件之一，一般其使用寿命约为１０００小时左右。更换过早，造成经济浪费，还费工费时；更换过晚，发动机工作性能变差，功率下降... Replacing the piston ring to determine the time He Ji Fan piston rings work under high temperature and pressure conditions, and lubrication conditions are poor, especially the first gas ring. For a long time, the piston ring has been one of the parts with the shortest service life, and its service life is generally about 1000 hours. Replacement premature, resulting in economic waste, but also time-consuming work; replacement too late, poor performance of the engine work, the power down ...