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Oil inlet valve for oil supply pump and high-pressure common rail system

An oil supply pump and oil inlet valve technology, which is applied to the charging system, fuel injection pump, engine components, etc., can solve the problems of reducing the oil supply capacity of the oil supply pump, shortening the oil suction time of the oil supply pump, and reducing the volumetric efficiency of the oil supply pump. The effect of reducing oil absorption loss, easy processing, and increasing oil supply

Active Publication Date: 2020-11-06
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil inlet valve for mechanical oil supply pump has the characteristics of simple structure, convenient processing, and high reliability. However, the opening time of the oil inlet valve for mechanical oil supply pump is determined by the state of the flow field and cannot be precisely controlled. The delay in opening will cause the oil supply pump to suck oil loss, resulting in reduced volumetric efficiency of the fuel supply pump
As the speed of the oil supply pump increases, the oil absorption time of the oil supply pump is further shortened, and the oil absorption loss caused by the delay in opening the oil inlet valve of the oil supply pump is more obvious
At present, due to the above-mentioned problems in the high-pressure common rail system that uses the oil inlet valve for the mechanical oil supply pump, the volumetric efficiency of this type of oil supply pump is prone to decrease at high speed, which reduces the oil supply capacity of the oil supply pump

Method used

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  • Oil inlet valve for oil supply pump and high-pressure common rail system
  • Oil inlet valve for oil supply pump and high-pressure common rail system
  • Oil inlet valve for oil supply pump and high-pressure common rail system

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Embodiment Construction

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0030] Such as figure 1 As shown, this embodiment provides an oil inlet valve for an oil supply pump used in a high-pressure common rail system, which is arranged at the oil inlet end of the oil supply pump. The oil inlet valve for an oil supply pump includes a valve seat 1 and a valve core 2, wherein the valve The seat 1 is provided with an oil chamb...

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Abstract

The invention relates to the technical field of high-pressure common rail systems, and discloses an oil inlet valve for an oil supply pump and a high-voltage common rail system. The oil inlet valve for the oil supply pump comprises a valve seat and a valve element, wherein an oil cavity is formed in the valve seat, an oil inlet and an oil outlet which communicate with the oil cavity are formed inthe valve seat, and the oil outlet communicates with the oil inlet end; and the valve element is arranged in the oil cavity and located between the oil inlet and the oil outlet, and the valve elementcomprises a ball core capable of selectively opening or closing the oil inlet and an elastic member enabling the ball core to elastically abut against the oil inlet. The pre-tightening force of the elastic member on the ball core is adjustable, and when the oil temperature in the oil cavity is increased, the pre-tightening force of the elastic member on the core is reduced so as to reduce the oilinlet pressure of the oil inlet. According to the oil inlet valve for the oil supply pump and the high-voltage common rail system, the elastic member is arranged so that the ball core elastically abuts against the oil inlet; and by changing the pre-tightening force of the elastic element to the ball core, the oil inlet pressure of the oil inlet valve for the oil supply pump is adjusted, the opening delay of the valve element is reduced, the oil supply amount is increased, the oil absorption loss of the oil supply pump is reduced, and the volumetric efficiency of the oil supply pump is improved.

Description

technical field [0001] The invention relates to the technical field of high-pressure common rail systems, in particular to an oil inlet valve for an oil supply pump and a high-pressure common rail system. Background technique [0002] In the high-pressure common rail system of a diesel engine, the oil supply capacity of the oil supply pump determines the engine output power. In order to increase the oil supply volume of the oil supply pump, the volumetric efficiency of the oil supply pump needs to be improved under the premise of the same displacement. [0003] In the prior art, the oil inlet valve for the oil supply pump of the high pressure common rail system of the diesel engine generally adopts a mechanical valve. The oil inlet valve for mechanical oil supply pump has the characteristics of simple structure, convenient processing, and high reliability. However, the opening time of the oil inlet valve for mechanical oil supply pump is determined by the state of the flow ...

Claims

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Application Information

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IPC IPC(8): F02M59/46F02M63/02
CPCF02M59/46F02M63/02
Inventor 顾坚乔信起王先勇孙春华魏子朝庄凤芝王佳新
Owner FAW JIEFANG AUTOMOTIVE CO
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