The fuel injection pump is an important component of the automobile diesel engine and is regarded as the "heart" component of the diesel engine. Its main function is to increase the oil pressure and increase the injection pressure to 10MPa~20MPa; control the injection time, inject and stop the injection at the specified time; control the injection amount, and change the amount of injection according to the working conditions of the diesel engine to adjust the speed and power of the diesel engine. In terms of structure and working principle, the fuel injection pump can be mainly divided into three types: plunger injection pump, injection pump-injector and rotor distribution injection pump. Among them, the plunger injection pump is widely used, and the reciprocating motion of the plunger in the pump body realizes the suction, compression and injection process of the fuel. The pump-injector type injection pump combines the injection pump and the injector, simplifies the fuel supply system, and improves the accuracy and reliability of the injection. The rotor distribution injection pump relies on the rotation of the rotor to achieve the pressurization and distribution of the fuel, and has the characteristics of small size, light weight, easy use and low cost.

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