Causes and solutions for the injector stuck in diesel generator set

As we all know, fuel injectors are one of the three pairs of fine pairs of diesel engine fuel supply system. After use for a period of time, the fuel injection nozzle often occurs due to improper operation or inadequate maintenance. What exactly causes the diesel engine fuel injector to get stuck, and what method can solve this problem? Haixing Dynamic will give you a brief introduction.

1. Analysis of the reasons why the injector nozzle of the diesel generator set is stuck

1. The diesel is not clean, there are impurities in the high-pressure oil pipe, and the wear of the needle valve pair of the injector needle valve pair makes the needle valve pair not tightly closed, the high-pressure gas in the incineration room flew back, and the needle valve pair is burned. In addition, the dirt on the injector pressure regulating spring, tappet and other parts are moved to the upper part of the injector needle valve through the injector lift, or the cotton rope and lead wire in the oil circuit to avoid oil leakage enter the injector through the high-pressure oil pipe, which will cause the needle valve pair to get stuck.

2. The machine temperature is too high and the injector is poorly cooled, and the ground valve is stuck. The engine will be overheated due to the oil supply time, excessive scale or blockage of cooling waterways, wear of the end surface of the pump impeller, and long-term overload of the engine will cause the engine to overheat.

3. The outlet valve is worn, causing the fuel injector to appear as a drop of oil when it is stopped, causing the injection nozzle to burn and accumulate carbon, causing the problem of stuck.

4. The bending pressure is too low, causing a high-pressure gas backflow in the incineration chamber;

5. When the injector is installed, the miscellaneous gasket or gasket is damaged, resulting in the air leakage, causing the temperature of the injector to be too high and stuck.

6. Reasons for parts production, such as the fuel injector device hole on the cylinder head and the fuel injector cooperate too tightly, the gap between the needle valve body and the device hole on the cylinder head is too small, and the cylinder head injector device hole is too deep processing, etc.

2. Solutions for stuck fuel injector nozzle for diesel generator set copyright by: www.hxdlkj.com

First put the stuck fuel injector nozzle into diesel or engine oil to heat up, then take it out and wrap it with a cloth, then clamp the needle valve with hand pliers and gradually move it, and remove the needle valve from the needle valve body. Drop a small amount of cleaning oil into the needle valve body, so that the needle valve will be repeatedly moved in the needle valve body until the needle valve can move calmly in the needle valve body. If there are signs of burns on the sealing surface of the needle valve, grinding should be done with abrasive paste. When grinding, you should pay attention to the amount of grinding paste and grinding time. Install the clean bell valve pair on the fuel injector and adjust the fuel injection pressure to use it again.

The above is the analysis and solution of the causes of diesel engine fuel injection nozzle stuck. Therefore, in daily work, we must do a good job in daily cleaning and inspection of diesel generator sets, extend the service life of diesel generator sets, and enable the diesel generator to be put into work.