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Noise reduction structure for reducing fuel pulsation exciting force based on shock absorber

A shock absorber and exciting force technology, which is applied in the direction of machines/engines, engine components, pipes/pipe joints/pipe fittings, etc., can solve the problems of difficult manufacturing and processing, achieve good structural reliability, eliminate vibration and noise, and not easily damage effect

Pending Publication Date: 2022-03-15
SAIC-GM-WULING AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure is equipped with several partitions in the common rail pipe, which is difficult to manufacture and process, and is not suitable for integral machining of the common rail pipe

Method used

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  • Noise reduction structure for reducing fuel pulsation exciting force based on shock absorber
  • Noise reduction structure for reducing fuel pulsation exciting force based on shock absorber
  • Noise reduction structure for reducing fuel pulsation exciting force based on shock absorber

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] The invention provides a noise reduction structure based on a shock absorber to reduce the exciting force of fuel pulsation. A shock absorber with a flow resistance friction damping effect is arranged at one or both ends of a common rail pipe, and the shock absorber is used to buffer fuel pulsation. impact force and damping attenuation.

[0038] In one embodiment, as figure 1 , 2 As shown, a shock absorber is provided at one or both ends of th...

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Abstract

The invention discloses a noise reduction structure for reducing fuel pulsation exciting force based on shock absorbers, which is characterized in that the shock absorbers with a flow resistance friction damping effect are arranged at one end or two ends of a common rail pipe, and the shock absorbers are used for buffering impact force and damping attenuation caused by fuel pulsation. According to the technical scheme, fuel oil internal friction damping is utilized, and the shock absorber is arranged, so that buffering absorption and damping attenuation of fuel oil impact energy are achieved; and moreover, the shock absorber is designed on a bypass, so that the flow of fuel oil is not influenced, the shock absorber is not easy to damage, functional faults are not easy to occur, the appearance is not influenced, and the shock absorber is suitable for changing the existing integrated pipeline and split support.

Description

technical field [0001] The invention relates to a vibration reduction and noise reduction technology for an internal combustion engine fuel supply system, in particular to a noise reduction structure based on a shock absorber that reduces the exciting force of fuel pulsation. Background technique [0002] With the improvement of fuel injector performance and the use of multiple injection and lean combustion technology, the fuel pressure increases, the single injection pulse width shortens, the closing time of the injector needle valve shortens, and the water hammer effect after the injector needle valve is closed increase. The water shock wave propagates in the pipe volume system between the needle valve of the fuel injector and the high-pressure fuel pump, and the pressure and speed of the fuel oil in the pipe volume system change alternately, forming shock vibration radiation noise to the structure, and the water shock wave propagates to the fuel injectors of each cylinder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/02F16L55/033F02B77/00
CPCF16L55/02F16L55/033F02B77/00
Inventor 田绍军杨丽曾庆懿钟柱声赵钪
Owner SAIC-GM-WULING AUTOMOBILE CO LTD