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Valve body structure of fuel system

A fuel system and valve body technology, which is applied in the valve shell structure, the valve's device for absorbing fluid energy, valve details, etc., can solve the problems of diaphragm resonance prone to abnormal noise, different performance, and small valve body flow. Achieve the effect of easy batch realization, convenient processing, and avoidance of resonance

Inactive Publication Date: 2016-09-28
CHERY AUTOMOBILE CO LTD
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Problems solved by technology

After investigation, it is found that many valve bodies on the existing market have different performances, some valve bodies have relatively small flow rates, and are prone to abnormal noises due to diaphragm resonance under negative pressure.

Method used

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  • Valve body structure of fuel system

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Embodiment Construction

[0015] The present invention is a structure that can effectively relieve the abnormal sound of the valve body of the fuel system under specific negative pressure conditions. The valve body includes a valve body knob 1, a valve body base 2, a filter cover 3, a positive pressure gasket 4, a Compression spring 5, negative pressure spring 6, negative pressure gasket 7, support seat 8 and diaphragm 9.

[0016] The valve body base 2 is a hollow structure, one end of the valve body base 2 is covered with a valve body knob 1 , the other end of the valve body base 2 is provided with a support seat 8 inside, and the other end is provided with an external thread. The integral injection molding of the valve body base 2 and the support seat 8 makes the structure more stable and reliable, and also reduces the production cost.

[0017] The valve body base 2 is provided with a filter cover plate 3, one end of the positive pressure spring 5 is fixed on the convex column in the center of the fi...

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Abstract

The invention discloses a valve body structure of a fuel system. A valve body has a hollow valve body base; one end of the valve body base is sleeved with a valve body knob; a filter cover plate is arranged in the valve body base; one end of a positive pressing spring is fixed on a convex column in the center of the filter cover plate, and the other end of the positive pressing spring is fixed in a concave cavity of a positive pressing gasket; a circular diaphragm is arranged between the positive pressing gasket and a negative pressure gasket; a support base is arranged in the other end of the valve body base; and a negative pressure spring for supporting the negative pressure gasket is arranged in the support base. The valve body structure is reasonable in structure; and when air is replenished in the valve body by negative pressure, the air replenishing flow can be guaranteed, and the valve body cannot generate the noise problem under the condition of specific negative pressure flow.

Description

technical field [0001] The invention relates to the field of automobile fuel system. Background technique [0002] As an important part of the fuel system, the valve body plays a very important role in maintaining the pressure balance of the fuel system. When the pressure in the fuel system is higher than the threshold value set by the system, the positive pressure valve is opened; when the pressure in the fuel system is lower than the atmospheric pressure, the negative pressure valve is opened. After investigation, it is found that many valve bodies on the existing market have different performances, and some valve bodies have relatively small flow rates, and are prone to abnormal noises due to diaphragm resonance during negative pressure. Contents of the invention [0003] The technical problem to be solved by the present invention is to realize a valve body structure with a reasonable structure, so that the valve body can not only ensure the air supply flow rate but al...

Claims

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Application Information

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IPC IPC(8): F16K27/00F16K47/02
CPCF16K27/00F16K47/02
Inventor 肖垂元罗张祥黄波
Owner CHERY AUTOMOBILE CO LTD
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