Such as insufficient cylinder pressure and insufficient combustion; Unreasonable atomization of fuel injector; The quality of diesel oil is too poor; Too much oil is ejected; The fuel injection is not uniform and the oil enters the combustion chamber.
Analyze the cause of black smoke from Komatsu excavator engine:
It is possible that the diesel oil is not atomized completely in the cylinder, resulting in black smoke
There may be a problem with the engine (incomplete fuel combustion, poor atomization, too much carbon in the piston)
Focus on whether the supercharger is damaged. The failure of the supercharger is also a factor of black smoke.
Another possibility is that the hydraulic system is choked, causing black smoke
It may be a problem with the fuel injection nozzle (check the fuel injection nozzle when the cylinder is disconnected, and replace it if there is a problem
In terms of hydraulic pressure, if it is a hydraulic fault, the engine will emit black smoke and the vehicle will be blocked
Also pay attention to the amount of black smoke: if the black smoke is small, it may be that the air filter has been dirty, or the diesel filter element has not been replaced for a long time; If the black smoke is large, generally speaking, it may be that the diesel combustion is insufficient. It is necessary to focus on detecting the oil pump and nozzle, and it is not ruled out that the oil volume of the oil pump is too large.
