Oil injection pumps are classified as: plunger injection pumps, injector injection pumps and rotor distribution injection pumps. The oil injection pump is an important part of the diesel engine, which consists of the pumping mechanism, oil supply adjustment mechanism, driving mechanism and oil injection pump body.

The role of the oil injection pump: 1, to improve oil pressure; 2, to control the injection time; 3, to control the oil injection, adjust the speed and power of the diesel engine.