Reasons and solutions for stuck fuel injector of diesel generator set

After a diesel generator set has been used for a period of time, the fuel injector may become stuck due to improper operation or maintenance. So, what are the reasons that lead toDiesel generator setThe fuel injector is stuck, how to solve the problem? Haixing is here to give you a brief introduction.

1. Causes of stuck fuel injector of diesel generator set

1. The diesel oil is not clean, and there are impurities in the high-pressure oil pipe, which causes the wear of the needle valve assembly of the injector deflector, causing the needle valve assembly to not close tightly, causing high-pressure gas to flow back in the combustion chamber, and burning the needle valve assembly. In addition, the dirt on the injector pressure regulating spring, tappet and other parts is moved to the upper part of the injector needle valve through the injector tappet, or the cotton rope and lead wire on the oil line used to prevent oil leakage enter the injector through the high-pressure oil pipe. oiler, the needle valve assembly will become stuck.

2. The outlet valve is worn, causing oil dripping when the injector stops injecting fuel, causing the injector nozzle to burn coke and accumulate carbon, causing it to become stuck and other malfunctions.

3. The body temperature is too high, the injector is poorly cooled, and the ground valve parts are stuck. The oil supply time is too late, the cooling water channel has too much scale or is clogged, the water pump impeller end face is worn, and the engine is overloaded for a long time, etc., which will cause the engine to overheat.

4. When installing the fuel injector, the gasket is missing or damaged, causing air leakage and causing the local temperature of the fuel injector to be too high and become stuck.

5. The injection pressure is too low, causing high-pressure gas to flow back in the combustion chamber.

2. Solution to stuck fuel injector of diesel generator set

First put the stuck fuel injector into diesel or engine oil to heat it, then take it out and wrap it with cloth, then clamp the needle valve with pliers and move it slowly to remove the needle valve from the needle valve body. Drop a small amount of clean engine oil into the needle valve body and allow the needle valve to move repeatedly in the needle valve body until the needle valve can move freely in the needle valve body. If there are traces of burns on the sealing surface of the needle valve, it should be ground with abrasive paste. When grinding, pay attention to the amount of grinding paste and grinding time. Install the cleaned bell valve assembly onto the fuel injector and adjust the fuel injection pressure before reusing it.

The above is the analysis and treatment methods of the causes of stuck fuel injectors of diesel generator sets. Haixing reminds everyone to pay attention to daily cleaning and detailed inspections when using diesel generator sets, strictly refer to safety operating procedures, and extend the service life of diesel generator sets and parts on the basis of ensuring normal production.