论文部分内容阅读
故障现象一辆刚刚参加营运的ZK6831HGA型城市公交车(装配玉柴4G-180-30国Ⅲ高压共轨电控发动机),其散热器内有柴油。故障诊断驾驶人反映,该车并无动力不足的现象,就是散热器中有柴油,每天收车后储液罐中会有柴油溢出。根椐现象初步分析产生故障的主要原因有以下两个方面:一是气缸盖有气孔或裂纹;二是相关密封失效或供油系统有故障。该车用玉柴发动机燃油系统的工作过程如下:柴油从油箱被吸出,经过燃油粗滤器后进入输油泵,然后在输油泵
Symptom A just entering the operation of the ZK6831HGA city bus (equipped with Yuchai 4G-180-30 country Ⅲ high-pressure common rail electric engine), the radiator has diesel. Fault diagnosis The driver reflects the car is not lack of power phenomenon, that is, there is diesel in the radiator, the car will receive a diesel tank overflow every day. Root 椐 phenomenon preliminary analysis of the main reasons for the failure has the following two aspects: First, there are holes or cracks in the cylinder head; Second, the relevant seal failure or failure of the oil supply system. The car Yuchai engine fuel system work process is as follows: diesel is sucked out of the tank, after the fuel strainer into the oil pump, and then in the oil pump