故障现象一辆东风EQ2102型汽车(装备康明斯EQ6BT5.9型发动机),行驶里程约为2万km,在行驶中出现提速缓慢的现象。驾驶人反映,刚刚对该车的喷油泵进行过拆卸和校正。故障诊断因为对喷油泵刚刚进行了拆卸和校正,所以首先检查喷油泵供油量随发动机转速变化而变化的情况,结果表明各转速下供油量正常,且喷油器工作良好。然后检查 Trouble phenomenon A Dongfeng EQ2102 car (equipped with Cummins EQ6BT5.9 engine), mileage is about 20,000 km, slow speed in the phenomenon of driving appears. Reflect the driver, just the car’s fuel pump has been demolished and corrected. Troubleshooting Because the fuel injection pump has just been disassembled and corrected, so first check the fuel pump fuel supply changes with the engine speed changes, the results show that the normal supply of fuel under normal speed, and the injector works well. Then check