What are the manifestations of weak operation of diesel generators?

The diesel generator runs weakly and emits thick smoke at various speeds. This phenomenon is mainly caused by insufficient fuel atomization and incorrect refueling time.

1. Severe wear of fuel injectors or discharge valves, dripping oil, poor atomization, and insufficient combustion.

2. The installation position of the fuel injector on the cylinder head is incorrect. The use of too thick or too thin copper pads or aluminum washers can cause improper injection of the fuel injector and insufficient combustion.

3. The transmission system components of the fuel injection pump are worn, resulting in delayed fuel supply.

4. The fuel supply time was not adjusted.

When the speed is unstable, the diesel engine emits smoke.

1. The fuel supply of different cylinders is inconsistent. Wear or improper adjustment of the injection pump and nozzle can easily cause uneven fuel supply in each cylinder. The method of determining inconsistent fuel supply can make the diesel generator run empty. Using the stop cylinder method, take turns stopping one cylinder of fuel supply, and measure the speed with a speedometer. When cutting off the cylinder, the fuel supply of each cylinder should be consistent, and the change in gas supply should be the same or very close. If there is a significant difference in speed change, the fuel supply of the fuel injection pump should be adjusted.

2. Water vapor or air leakage in the diesel fuel supply system can also cause poor fuel supply to the fuel injection pump.

The diesel generator has a low speed and is filled with smoke, but the high speed is basically normal.

This is manifested as cylinder leakage, with less leakage at high speeds, so it can operate normally. Gas leakage leads to low temperature and is less likely to cause a fire. During the operation of a diesel generator, if a large amount of smoke is emitted from the fuel filling port, or if there is a "squeaking" sound of air leakage in the running part of the crankshaft, and it is more obvious at low speeds, it can be determined that there is air leakage between the cylinder block and the piston. The other two possible areas for air leakage are the valve and cylinder gasket.

The performance power of diesel generators is poor, but there is no smoke at the exhaust port when idling and when the fuel supply is low, and black smoke is easily emitted when the fuel supply is high.

1. The air filter element is blocked, causing poor water intake in the diesel generator but insufficient power.

2. The valve clearance is too large, resulting in insufficient valve opening and poor intake volume.

3. There is too much carbon accumulation in the exhaust pipe, and the resistance at the exhaust port is too high.