In the hot summer, the excavators on the construction site began to fail frequently, and the black smoke from the excavators became the focus of excavator failures. The exhaust pipe of the excavator emits black smoke during operation, and the diesel engine also "holds the car" when the stick is operated during excavation operations. The master summarized several reasons for the problem of black smoke from the engine: such as insufficient cylinder pressure and insufficient combustion; unreasonable atomization of the fuel injector; poor diesel quality; excessive fuel injection; fuel injection If the uniformity is not reached, the oil enters the combustion chamber. If you want to quickly and accurately solve the problem of black smoke from digging, you should consult a professional excavator repairer for the specific situation.
The reason for the black smoke from the engine:
1. There may be a problem with the engine (incomplete fuel combustion, poor atomization, excessive carbon deposits in the piston)
2. It may be that the diesel is not completely atomized in the cylinder, causing black smoke
3. There is another possibility that the hydraulic system is holding the car and causing black smoke.
4. Focus on whether the turbocharger is damaged. The failure of the turbocharger is also a factor of black smoke.
5. It may be the problem of the fuel injection nozzle (check the fuel injection nozzle when the cylinder is broken, and replace whichever has the problem.
6. Also pay attention to the amount of black smoke: if the black smoke is very small, it may be that the air filter has been dirty, or it may be that the diesel filter element has not been replaced for a long time; if the black smoke is large, it is generally possible It is because the diesel fuel is not fully burned, and it is necessary to focus on the inspection of the oil pump and the nozzle, and it is not ruled out that the oil pump oil volume adjustment may be too large.
7. If there is a hydraulic failure on the hydraulic side, black smoke from the engine will also be accompanied by the phenomenon of holding the car.
