Injector failure Injector failure

Injector failure Injector failure

The failure of the injector The failure of the injector includes poor atomization, stuck needle valve, blockage of the nozzle hole and low injection pressure, etc. There are many reasons for these failures, most of which are due to the injector coupler The damage is partly caused by the weakening of the pressure regulating spring, the deformation of the lower plane of the injector body, or the damage of the O-ring of the injector. The injector can be repaired or replaced according to the situation. After the injector is repaired, it needs to be tested, and the pressure and tightness of the injector are tested and adjusted.

Since the injector and its transmission parts are subject to high frequency vibration, collision and friction with each other, if the tightening torque of the lock nut is not enough, the adjusted locking device will be loosened, which will cause the fuel metering time of the injector. increase so that the fuel injection exceeds the specified value. The seating pressure after the end of fuel injection is wrong, and the diesel engine will emit black smoke. Cracks in the nozzle head of the injector or blockage of the nozzle holes will also cause failures such as power drop and black smoke.