Oil inlet valve and high-pressure common rail fuel pump using same

A high-pressure common rail and oil inlet valve technology, applied in fuel injection pumps, engine components, machines/engines, etc., can solve problems such as reduced fuel supply efficiency, stuck oil inlet valves, uneven force on the sealing surface, etc., to achieve reduction The effect of small high-pressure fuel backflow, preventing the oil inlet valve from being stuck, and improving product reliability

Pending Publication Date: 2017-07-14
北油电控燃油喷射系统(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. During the oil suction process of the plunger, when the low-pressure oil enters the plunger chamber, the oil inlet valve 2 is not guided when it is opened, and it is prone to skewing. When the plunger presses oil, the oil inlet valve 2 cannot be reset in time to seal the oil inlet hole. Part of the oil will flow back, which will affect the oil supply efficiency of the oil pump
[0005] 2. When the inclined oil inlet valve 2 is reset, the force on the sealing surface is uneven, and the pressure per unit contact area is too large, which wi

Method used

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  • Oil inlet valve and high-pressure common rail fuel pump using same
  • Oil inlet valve and high-pressure common rail fuel pump using same
  • Oil inlet valve and high-pressure common rail fuel pump using same

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Embodiment Construction

[0026] The invention provides an oil inlet valve and a high-pressure common rail pump using the oil inlet valve. see image 3 As shown, the oil inlet valve includes a circular valve plate 21 and a hollow guide cylinder 22 connected to the circular valve plate 21, and the guide cylinder 22 is connected with the circular valve plate 21 to form a cylinder with an inner cavity. shaped structure. Wherein, a plurality of oil holes 22a are opened on the wall of the guide cylinder 22 . Preferably, the circular valve plate 21 and the guide cylinder 22 are integrally formed and precisely processed.

[0027] Please refer to Figure 4 , 5 As shown, when in use, the oil inlet valve 2 is installed on the oil inlet valve seat 1 in the high-pressure common rail pump. The end faces are sealed. The upper part of the oil inlet valve seat 1 is the matching oil outlet valve seat 4, and the middle part of the oil outlet valve seat 4 is provided with a vertical cavity, and the upper part of th...

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PUM

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Abstract

The invention discloses an oil inlet valve and a high-pressure common rail fuel pump using the same. The oil inlet valve comprises a circular valve block and a hollow guide cylinder connected onto the circular valve block; the guide cylinder is connected with the circular valve block to form a cylindrical structure with an inner cavity; a plurality of oil holes are formed in the cylinder wall of the guide cylinder. According to the oil inlet valve and the high-pressure common rail fuel pump using the same, the oil inlet valve is stable in motion, capable of timely returning, reliable in sealing and small in failure rate; the high-pressure common rail fuel pump using the oil inlet valve is stable in rail pressure, high in oil supply efficiency and not liable to fuel oil leakage.

Description

technical field [0001] The invention relates to the technical field of high-pressure common rail pumps, in particular to an oil inlet valve and a high-pressure common rail pump using the oil inlet valve. Background technique [0002] The oil inlet valve of the traditional high-pressure common rail pump is a plate valve structure, such as figure 1 , 2 shown. The traditional oil inlet valve 2 is installed on the oil inlet valve seat 1, and is sealed by the bottom surface of the oil inlet valve 2 and the upper end surface of the oil inlet valve seat 1. The upper end of the oil inlet valve 2 is equipped with an oil inlet valve spring 3, which can play a role in buffering and reducing the reset time of the oil inlet valve 2. The upper end of the oil inlet valve spring 3 is installed on the oil outlet valve core 5, the oil outlet valve core 5 and the oil outlet valve seat 4 are sealed by the cone surface, and the upper end of the oil outlet valve core is the oil outlet valve sp...

Claims

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Application Information

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IPC IPC(8): F02M59/46
CPCF02M59/464
Inventor 王永和
Owner 北油电控燃油喷射系统(天津)有限公司
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