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.

Cylinder liners are divided into two categories: dry cylinder liners and wet cylinder liners. The cylinder liner that does not come into contact with cooling water on the back is called a dry cylinder liner, while the cylinder liner that comes into contact with cooling water on the back is a wet cylinder liner. The dry cylinder liner has a thin thickness, simple structure, and convenient processing. The wet cylinder liner is directly in contact with cooling water, which is beneficial for engine cooling and for small and lightweight engines