Manufacturing method of fuel inlet and outlet valve assembly for fuel injection pump

1. The present invention belongs to a common rail system of a diesel engine, and particularly relates to a fuel inlet and outlet valve assembly for a fuel injection pump.

Background technique:

2. The high-pressure variable fuel injection pump of the common rail system of diesel engines (hereinafter referred to as the high-pressure pump) is the core component of the fuel injection system. The structure of the pump oil system of the fuel supply core component determines the performance and work of the fuel pump to a certain extent. Consumption.

3. The oil pump system is a key component of the high-pressure pump, responsible for converting low-pressure fuel into high-pressure oil. Due to the continuous development of technology, its structure determines the fuel supply efficiency of the high-pressure pump, thereby affecting the efficiency and life of the oil pump, which is determined to a certain extent The quality of the oil pump.

4. Please refer to Fig. 2. In the prior art, the inlet valve assembly and outlet valve assembly have complicated structures, many traditional sealing surfaces, easy leakage, and large space occupancy.

5. To this end, the present invention provides an oil inlet and outlet valve assembly for a variable pressure variable fuel injection pump that solves the leakage caused by excessive oil valve sealing surfaces, reduces the space required for arranging the valve assembly, and improves the volumetric efficiency.

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