6240电喷柴油机冒黑烟故障的分析与处理

Analysis and Settlement of the Smoke Problem of 6240 EFI Engine

针对某6240电喷柴油机出现的冒黑烟故障,结合试验测试和对电喷泵结构及工作原理的分析,探讨了故障可能原因。对电喷系统的模拟计算分析表明:电喷泵电磁阀密封锥面密封不严是导致该故障的原因。据此采取了相应的处理措施,经装机验证,冒黑烟故障得到解决。

In view of the black smoke fault of a 6240 EFI diesel engine,combined with test and analysis of structure and working principle of the EFI pump,the possible fault causes were discussed.The simulation analysis of the EFI system shows that the reason of the failure is the bad sealing cone of the EFI pump's solenoid valve.According to this,the corresponding treatment measures were taken,and the black smoke fault was verified to be solved by engine test.