The symptoms of cylinder knocking during operation of diesel generator are: from medium speed to low speed, a heavy cylinder knocking sound will be made, black smoke will be emitted from the exhaust pipe of diesel generator set, and there will be sound of gunfire or fire shooting from time to time, and the engine body will overheat. The main reasons for cylinder knocking are:

Poor fuel combustion

Low fuel injection pressure, fuel injector dripping, poor fuel atomization, and delayed fuel supply can all cause poor fuel combustion and cause cylinder knocking. The knocking sound caused by this type of malfunction is low and hoarse, accompanied by engine overheating, black smoke, or exhaust pipe blasting, spraying fire, and other phenomena. The fuel injector should be removed for inspection and adjustment, and the fuel supply time should be adjusted. If necessary, new parts should be replaced to ensure compliance with regulations

Reason for cylinder pulling:

The reasons for cylinder pulling are very complex, with design factors such as material selection, determination of gap size, appropriateness of device installation, reasonable structural layout, surface roughness, and perfect lubrication and cooling arrangements. From a management perspective, it may be caused by the following reasons:

Poor cylinder lubrication:

The cylinder is not lubricated enough or the oil supply is interrupted, and the cylinder is pulled due to direct metal contact. The reasons for poor cylinder lubrication include: too little oil in the oil pan or poor oil quality, too high temperature of the diesel engine, or damage or failure of the piston ring (mainly the oil ring).