The diesel pump is insufficient, which is a vicious circle, which ultimately leads to the black smoke in the exhaust. It is mainly carbon particles that fuel incompletely burned. Therefore, the excess supply of fuel supply system fuel, the air volume of intake system is reduced, the sealing chamber of the combustion chamber composed of the cylinder head and the piston is poor, and the injector injection quality is caused by incomplete the fuel, thereby so that the row Black smoke. Exhaust black smoke has the following reasons:
1 High-pressure oil pump is too large or the amount of supply supplies in each cylinder is uneven
2 The valve is sealing, resulting in leakage, low cylinder compression pressure
3 air filter into the airway block, the intake resistance is large, so that the intake volume is insufficient
4-cylinder sleeve, piston, severe wear of piston ring
5 injector work is not working
6 Engine overload operation
7 The fuel supply of the oil supply is too small, and the combustion process is moved to the exhaust process.
8 gasoline electric spray system control failure failure, etc.
For engines, black smoke can be inspected through high pressure oil pump adjustment, injector injection test, cylinder compression pressure measurement, airway cleaning, oil supply advance angle adjustment, gasoline electric spray system fault diagnosis and other work to inspect and exclude.
