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故障现象一辆行驶了4.5万km的XML6128J13W厦门金龙客车(装配玉柴YC6L330-30国Ⅲ发动机,发动机采用博世高压共轨柴油喷射控制系统),近期出现发动机行驶无力(在爬坡时更为明显),最高车速只有95 km/h左右的现象,但发动机故障灯未点亮。故障诊断根据用户所反映的情况,对该车进行试车。发动机原地加速时,转速可达2 500 r/min;路试过程中确实存在用户所反映的故障现象,客车无法高速行驶,遇到一些上坡道路时需降挡才能正常行驶。根据试车情况分析,车辆行驶无力,排除底盘因素后,一般是发动机的燃油管路堵塞
Fault phenomenon A traveling 45000 km XML6128J13W Xiamen Jinlong Bus (equipped with Yuchai YC6L330-30 country Ⅲ engine, the engine using Bosch high-pressure common rail diesel injection control system), the recent engine running weakness (more obvious when climbing ), The maximum speed of only 95 km / h phenomenon, but the engine fault light is not lit. Troubleshooting According to the user reflects the situation, the car was commissioned. When the engine accelerates in situ, the speed can reach 2 500 r / min. There is a fault phenomenon reflected by the user during the road test. The passenger car can not run at high speed. When it encounters some uphill roads, it needs to downshift for normal running. According to the test case analysis, vehicle driving weakness, excluding chassis factors, the general fuel line is blocked the engine