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Fuel pump valve element

A valve element and fuel pump technology, applied in engine elements, fuel injection pumps, fuel injection devices, etc., can solve problems such as easy turbulence, reduce processing requirements, prevent radial movement, and achieve the effect of unidirectional flow

Inactive Publication Date: 2017-03-22
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The valve seat in the ball valve structure in the current solution also has at least one conical surface or arc surface, and the spherical valve element has no guide in the valve seat cavity and is easy to move

Method used

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Embodiment Construction

[0012] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] Figure 1~4 , including plunger 1, plunger cavity 2, plunger sleeve 3, return spring 4, oil outlet valve spring seat 5, oil outlet passage 6, guide sleeve 7, spherical valve element 8, oil inlet passage 9, conical surface 10. The second hole 11, the first hole 12, the upper section of the guide sleeve 13, the axial hole 14, the stepped round hole 15, etc.

[0014] Such as Figure 1~4 As shown, the present invention is a fuel pump valve element, including a plunger sleeve 3, and the plunger sleeve 3 is provided with a plunger chamber 2 and an oil outlet passage 6 along the axial direction, and the gap between the plunger chamber 2 and the oil outlet passage 6 The space is connected through the stepped round hole 15, the oil outlet passage 6 is provided with a guide sleeve 7, a spherical valve element 8 is provided between the lower e...

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Abstract

The invention relates to a fuel pump delivery valve, and particularly relates to a fuel pump valve element. The fuel pump valve element comprises a plunger bushing, wherein a plunger cavity and an outlet channel are axially formed in the plunger bushing, the plunger cavity communicates with the outlet channel through a step round hole, a guide sleeve is arranged in the outlet channel, a spherical valve element is arranged between the lower end of the guide sleeve and the upper end surface of the step round hole, a return spring is arranged in an inner hole which is formed in the upper end of the guide sleeve, the lower end of the return spring is limited and fixed by virtue of a step formed by the inner hole of the guide sleeve, the upper end of the return spring is limited and fixed by virtue of a delivery valve spring seat, and the delivery valve spring seat is fixed to the interior of the outlet channel. According to the fuel pump valve element, a steel ball is matched with a conical surface at an outlet of the plunger bushing, so that the processing requirement is reduced. Compared with a traditional ball valve, the guide sleeve structure is designed in the fuel pump valve element, so that the axial movement of the return spring and the ball is guaranteed.

Description

technical field [0001] The invention relates to a fuel pump outlet valve, in particular to a fuel pump valve element. Background technique [0002] At present, the commonly used oil delivery valve is a one-way valve design composed of a ball valve or a cone valve. In the ball valve, there is a spherical valve element, and the spherical valve element and the valve seat cooperate to realize the opening and closing of the channel. In the cone valve, there is a cone valve element, the cone valve element has at least one conical surface or arc surface, and the cone valve element and the valve seat work together to realize the opening and closing of the channel. The valve seat in the two valves has at least one conical or arc surface. [0003] In order to ensure the reliable sealing of the conical valve element and the valve seat, the sealing surface of the valve element and the valve seat needs to be precisely processed to ensure its roughness, roundness and coaxiality. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/46
CPCF02M59/462
Inventor 黄见吴永煌俞建达靳玉刚
Owner CHINA FIRST AUTOMOBILE
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