1. Air filter not clean:

Unclean conditions can increase resistance, decrease air flow, decrease inflation efficiency, and result in insufficient engine power. Clean the diesel air filter core or remove dust from the paper filter element as required, and replace the filter element if necessary. The main component in the intake system is the air filter (air filter). The air contains a certain amount of dust, which depends on the location, climate, and soil conditions. If the air filter fails or is not maintained properly, dust can be sucked into the cylinder through the air intake system and mixed with lubricating oil to form a highly destructive abrasive. This can cause severe wear of components such as cylinders, pistons, piston rings, valves, and valve seats, greatly reducing the lifespan of diesel engines. In severe cases, it can also cause damage to diesel engine pistons, bearing shells, and cylinders.

2. Exhaust pipe blockage:

Blocked exhaust pipes can cause blockage of the exhaust, resulting in decreased fuel efficiency and reduced power. It should be checked whether there is an increase in exhaust resistance due to excessive carbon accumulation in the exhaust pipe. The general exhaust back pressure should not exceed 3.3Kpa, and carbon deposits in the exhaust pipe should be cleaned regularly. After the diesel engine is turned off, the exhaust pipe can be removed to check the carbon accumulation at the exhaust port, which can determine the working condition of the diesel engine. The carbon deposits are black gray in color and appear to be covered with a layer of white frost on the surface. The extremely thin layer of carbon deposits indicates that the diesel generator is operating well; The carbon deposits are black and bright in color, but not wet, indicating that the diesel engine is slightly burning lubricating oil. If some exhaust ports are wet or have lubricating oil, it indicates that a large amount of lubricating oil is discharged from the cylinder. If the carbon deposits on the exhaust ports are significantly thicker than those on other cylinder exhaust ports, it indicates that the fuel injector of the cylinder is not working properly or the sealing of the cylinder is deteriorating. The carbon deposits on the exhaust ports of each cylinder are thicker, and the color is darker. This is mostly due to the low working temperature or the late injection of fuel, resulting in severe diesel afterburning.

3. Fuel supply advance angle too large or too small:

Excessive or insufficient fuel supply advance angle can cause the fuel pump to inject fuel too early or too late (if the injection time is too early, the fuel will burn insufficiently, if it is too late, white smoke will be emitted, and the fuel will also burn insufficiently), resulting in suboptimal fuel combustion process. At this time, it is necessary to check whether the screws of the fuel injection transmission shaft adapter are loose. If they are loose, the fuel supply advance angle should be readjusted according to the requirements and the screws should be tightened. If the fuel supply advance angle is too large or too small, it will cause insufficient success rate. If the fuel is injected too early, the upward power consumption of the piston will be high, and the vibration will intensify. If it is too late, the afterburning will be severe, and the fuel consumption will increase, making the combustion process not in the optimal state. At this time, the fuel supply advance angle should be readjusted according to the requirements.