High-pressure common rail pump and oil inlet and outlet valve module for same

Abstract

The invention provides an oil inlet and outlet valve module. The oil inlet and outlet valve module comprises an oil inlet mechanism and an oil outlet mechanism; the oil inlet mechanism comprises an oil inlet valve base, an oil inlet valve element, and an oil inlet valve elastic part; an inner guide hole communicating with the oil inlet hole is formed in the top end of the oil inlet valve base; theoil inlet valve element comprises a reversely conical sealing part; under the effect of the oil inlet valve elastic part, the reversely conical sealing part realizes sealing fit with an opening end of the inner guide hole; the oil outlet mechanism comprises an oil outlet valve base, an oil outlet valve element and an oil outlet valve elastic part; an oil outlet through hole, communicating with the opening end of the inner guide hole of the oil inlet mechanism, is formed in the oil outlet valve base; the oil outlet valve element is a spherical valve; and under the effect of the oil outlet valve elastic part, the spherical valve realizes sealing fit with an oil outlet end of the oil outlet through hole. The invention further provides a high-pressure common rail pump and the oil inlet and outlet valve module for the high-pressure common rail pump. The oil inlet and outlet valve module is simple in machining, not easy to wear and tight in sealing; and the high-pressure common rail pump istight in sealing and stable in pressure.

Description

technical field [0001] The invention relates to the technical field of common rail, in particular to a high-pressure common-rail pump and an oil inlet and outlet valve assembly used for the high-pressure common-rail pump. Background technique [0002] High-pressure common rail technology refers to a fuel supply method that completely separates the generation of injection pressure and the injection process from each other in a closed-loop system composed of a high-pressure oil pump, a pressure sensor and an ECU. The high-pressure oil pump delivers high-pressure fuel to the public fuel supply Through precise control of the oil pressure in the common oil supply pipe, the pressure of the high pressure oil pipe has nothing to do with the engine speed, which can greatly reduce the change of the diesel engine oil supply pressure with the engine speed, thus reducing the defects of the traditional diesel engine . [0003] The high-pressure pump is used to pressurize the fuel from lo...

AI Technical Summary

Problems solved by technology

[0008] The first technical problem to be solved by the present invention is to provide an oil inlet and outlet valve for high-pressure common rail pumps, which is easy to process, not easy to wear, and tightly sealed, thereby overcoming the cumbersome processing procedures of the existing oil inlet and outlet valves , the processing precision is high, and the use process is easy to cause the lack of tight sealing due to wear

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