我们在巡回检修中发现,不少机手在更换单缸喷油泵柱塞时,只换柱塞副,不换止回阀。机手认为,柱塞是担负供油重任的,承受压力大,磨损快;止回阀只担任控制回油的任务,理所当然磨损轻,因此只换柱塞,不换止回阀。其实,这种做法是错误的。大家知道,柱塞供油,止回阀控制回油,高压油管传递燃油,喷油器准确喷油,这些动作是协调一致,缺一不可的。如果它们之间任意一处出现故障,就会打乱整个供油系统的紧密配合。例如:①喷油泵柱塞供油正常,而止回阀磨损失去控制,就会使高压 We found in the tour overhaul, many hand in the replacement of single-cylinder fuel injection plunger, only for the plunger, do not change the check valve. The hand that the plunger is responsible for the oil, under pressure, fast wear and tear; check valve only serves to control the task of oil return, of course, wear light, so only change the plunger, do not change the check valve. In fact, this approach is wrong. We all know that the plunger oil supply, check valve control back to the oil, high pressure fuel pipe delivery, fuel injector accurate injection, these actions are coordinated and indispensable. If anything goes down between them, it disrupts the tightness of the entire fueling system. For example: ① fuel injection plunger plunger normal, and check valve wear out of control, it will make high pressure