The performance index of diesel oil used can not meet the standard requirements, which leads to poor fuel combustion and black smoke.

The air inlet is blocked.

When diesel is burning, it can't provide enough air, which leads to incomplete combustion and black smoke from diesel engine.

3. Insufficient compression force

Insufficient compression force leads to that the required pressure cannot meet the combustion requirements, the combustion conditions become worse, and the diesel engine emits black smoke.

Maintenance treatment method

It can be calibrated by adjusting the fuel injection pump, and adjusted and maintained one by one according to the cause of the failure. If the fuel injection timing is inaccurate, loosen the universal joint of the fuel injection pump and adjust it according to the regulations. If the air filter is removed and the black smoke in the rear row decreases, the filter element should be cleaned or replaced; Improve driving operation; The repairman should adjust the fuel injection pump and injector.

1, ignition advance, ignition advance angle delay.

2, too much oil supply, too rich mixture, reduce oil supply.

3. The timing gear for camshaft adjustment is out of synchronization, please adjust it.

4. There is something wrong with the oil circuit. Replace oil pipes and filters.