Diesel Generator Tech

Under normal operation, the engine speed suddenly rises, so that the engine speeds up beyond the rated speed and loses control, and emits a huge roar, the exhaust pipe emits a lot of black smoke or blue smoke. Cause of failure The fundamental cause of diesel engine overspeed is that diesel engine loses or changes its speed regulation characteristics. Faults of fuel injection pump and governor, such as stagnation or looseness of relevant components, will cause excessive oil supply and loss of normal speed regulation characteristics, while the combustion chamber entering additional diesel or oil will change the speed regulation characteristics of diesel engine. 1) Faults of injection pump and speed regulator A. When assembling and repairing, impact the plunger, oil outlet valve seat of fuel injection pump, too much tightening torque will cause the deformation of plunger sleeve, impurities entering into the clearance of plunger pair, too thin gasket on the positio...