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Integrated oil outlet valve holder for high-pressure common rail pump

A high-pressure common rail and oil outlet valve technology, which is applied in fuel injection pumps, engine components, machines/engines, etc., can solve the problems of high cost and difficult customer acceptance, so as to improve pressure fluctuations, reduce costs, and meet low-cost applications required effect

Pending Publication Date: 2021-07-09
湖南致用科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two common rail pressure control solutions are very expensive, and are difficult to be accepted by customers in some low-cost high-pressure common rail system application scenarios

Method used

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  • Integrated oil outlet valve holder for high-pressure common rail pump
  • Integrated oil outlet valve holder for high-pressure common rail pump
  • Integrated oil outlet valve holder for high-pressure common rail pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, an integrated oil outlet valve tight seat for high-pressure common rail pumps in this embodiment includes an oil outlet valve tight seat body 1 installed in the upper end of the plunger sleeve 12, an oil outlet valve tight seat installed on the oil outlet valve tight seat The oil outlet valve 8 in the body 1, the plunger sleeve 12 is provided with a plunger hole 14 from top to bottom, the plunger hole 14 is slidingly fitted with a common rail pump plunger 13, and the tight seat body 1 of the oil outlet valve is provided with The oil outlet valve installation chamber 1-1, the upper end of the oil outlet valve tight seat body 1 is provided with an oil outlet hole 1-3, and the oil outlet valve installation chamber 1-1 is equipped with an oil outlet valve 8, the oil outlet valve 8 is an existing It already exists in the technology and can be purchased directly on the market. It mainly includes the oil outlet valve seat 8-2 fixed at the bottom of t...

Embodiment 2

[0028] The difference between this embodiment and embodiment 1 is that, as figure 2 As shown, the mechanical pressure regulating valve of this embodiment includes a pressure regulating valve mounting seat 2, a pressure regulating valve seat 3, a tapered plunger 4', a plunger valve seat 5', a pressure regulating spring 6 and a pressure regulating spring gasket 7. The pressure regulating valve mounting seat 2 is fixed in the side wall of the tight seat body 1 of the oil outlet valve, the pressure regulating valve seat 3 is fixed at the front end of the pressure regulating valve mounting seat 2 and the front surface of the pressure regulating valve seat 3 completely blocks the oil passage Channel hole 1-2, the front end of the pressure regulating valve seat 3 is provided with a conical pressure regulating valve seat throttling hole 3-1' communicating with the oil passage hole 1-2, and a conical pressure regulating valve seat throttling hole 3- 1' The rear end is provided with a ...

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PUM

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Abstract

The invention discloses an integrated oil outlet valve holder for a high-pressure common rail pump. The integrated oil outlet valve holder for the high-pressure common rail pump comprises an oil outlet valve holder body mounted in the upper end of a plunger sleeve and an oil outlet valve mounted in the oil outlet valve holder body, wherein a plunger hole is formed in the plunger sleeve from top to bottom; a common rail pump plunger is assembled in the plunger hole in a sliding manner; an oil outlet valve mounting cavity is formed in the oil outlet valve holder body; and an oil outlet valve is mounted in the oil outlet valve mounting cavity. The integrated oil outlet valve holder for the high-pressure common rail pump further comprises a buffer valve which is arranged above the oil outlet valve, and a mechanical pressure regulating valve which is arranged in the side wall of the oil outlet valve holder body. The common rail pressure is controlled in an open-loop mode through the pressure regulating valve integrated on the oil outlet valve holder, and the pressure buffer valve integrated on the oil outlet valve holder is used for balancing pressure wave crests in the plunger oil pressing process and pressure echoes generated when an oil sprayer stops spraying, so that a rail pressure closed-loop control module in an original common rail system is replaced, and the cost of the common rail system is greatly reduced.

Description

technical field [0001] The invention relates to the field of diesel engine fuel systems, in particular to an integrated oil delivery valve tight seat used on a high-pressure common rail pump. Background technique [0002] As my country's diesel engine exhaust emissions become increasingly strict, the high-pressure common rail fuel system has become the mainstream diesel fuel system solution in the market. The commonly used high-pressure common rail system currently uses pressure sensors and electronic pressure regulating valves to control the rail pressure of the common rail system. At present, there are two kinds of schemes commonly used: method one is that the electronic control unit ECU of the common rail system monitors the fuel pressure in the common rail pipe through the common rail pressure sensor installed on the common rail pipe, and then controls the fuel inlet metering on the common rail pump The valve opening can be adjusted in real time to adjust the amount of ...

Claims

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Application Information

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IPC IPC(8): F02M59/46
CPCF02M59/46F02M59/462
Inventor 张伟杨天静温文平陈斌何治国
Owner 湖南致用科技有限公司