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EGR one-way valve opening pressure and opening degree feedback detection device and method

A technology of opening pressure and opening degree feedback, which is used in measuring devices, mechanical valve testing, and optical devices, etc., can solve the problems that elastic deformation performance cannot be completely consistent, and the pressure and opening degree difference of one-way valve opening and closing, etc. To achieve the effect of simple structure, high detection accuracy and convenient use

Pending Publication Date: 2021-08-06
渭南美益特发动机减排技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that the reed used in the reed check valve is affected by the material, and the elastic deformation performance of each batch cannot be completely consistent. As a result, the pressure and opening degree of the check valve opening and closing of each batch are different.

Method used

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  • EGR one-way valve opening pressure and opening degree feedback detection device and method
  • EGR one-way valve opening pressure and opening degree feedback detection device and method
  • EGR one-way valve opening pressure and opening degree feedback detection device and method

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Embodiment 1

[0024] This embodiment is a kind of EGR check valve opening pressure and opening feedback detection device, such as figure 1 , 2 shown. This embodiment includes: a simulated valve body 1, the front end and the rear end of the simulated valve body are respectively provided with an input flange 2 with an input pressure sensor 201 and an output flange 3 with an output pressure sensor 301, the The input flange is connected to the pressure source through a pipeline, and the output flange is connected to the pressure regulating exhaust port through a pipeline; one side of the simulated valve body is provided with a side transparent observation window 101, and the side is transparently observed There is a camera 4 outside the window, see figure 2 ( figure 1 The camera is not shown in the middle), the top of the simulated valve body is provided with a top transparent observation window 102, and a laser displacement sensor 5 is arranged outside the described top transparent observa...

Embodiment 2

[0037] This embodiment is an improvement of the above-mentioned embodiment, and it is a refinement of the analog valve body in the above-mentioned embodiment. The analog valve body described in this embodiment is a rectangular prism frame made of metal, with the bottom closed and fixedly connected to the base. The side and top are closed by transparent material and fixed with bolts, and the front and rear ends are respectively connected with the input flange and the input flange with bolts.

[0038] The frame of the analog valve body is made of metal profiles or plates, which saves cost and facilitates manufacturing on the basis of ensuring the design cavity. The frame is bent or profiled with a metal plate to form a hexahedral frame, the bottom surface is closed with a metal plate, the front and rear sides are provided with bolt holes connected with the input flange and output flange, and the top and both sides are provided with bolt holes connected with the transparent glass ...

Embodiment 3

[0041] This embodiment is an improvement of the above-mentioned embodiment, and is a refinement of the input flange and the input flange of the above-mentioned embodiment. The input flange and the input flange described in this embodiment are respectively connected to the large mouth end of a section of reducing pipe 8, The small mouth end of the reducer is connected with a section of straight pipe, and the straight pipe section is provided with clamp 9, see figure 1 , 2 .

[0042] The reducer is a tube with a large end and a small end, which is used for diffusing or collecting flow. The transition of the reducer is used to match the gas flow with the volume flow of the one-way valve, the air pressure is stable, and the feedback data is accurate. .

[0043] Using the clamp connection, it is faster and more convenient to assemble or disassemble the pipeline, and it is convenient to replace the reed under test.

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Abstract

The invention relates to an EGR one-way valve opening pressure and opening degree feedback detection device and method. An input flange with an input pressure sensor and an output flange with an output pressure sensor are arranged at the front end and the rear end of a simulation valve body respectively; a side transparent observation window is arranged on one side face of the simulation valve body, a camera is arranged outside the side transparent observation window, a laser displacement sensor is arranged outside a top transparent observation window, and a prismatic simulation valve seat and a reed serving as a valve clack are arranged in the simulation valve body. Opening of the EGR one-way valve reed is simulated through the closed simulation valve body with the transparent window, and the camera and the laser displacement sensor are used for recording various states of action and deformation of the reed, so that various working parameters of the reed are obtained, accurate data are provided for actual use of the reed, and the problems of check valve reed opening pressure detection, reed opening value detection under different pressures and the like are solved. The device is simple in structure, convenient to use and high in detection precision.

Description

technical field [0001] The invention relates to a detection device and method for the opening pressure and opening feedback of an EGR check valve, which is a detection device and method, and a device and method for detecting the performance of a special check valve of an EGR system of an automobile engine. Background technique [0002] For the EGR system of a turbocharged automobile engine, when the engine is running at low speed, the boost pressure of the compressor may be higher than the pre-vortex pressure. If the EGR valve is opened at this time, fresh air will flow back into the exhaust manifold. , affecting the exhaust gas, resulting in a decrease in engine combustion efficiency. In order to solve this problem, the following two schemes are generally adopted to prevent the "backflow" of air. The first method is to use the poppet EGR valve to control the system to shut down, but there is a problem of response lag; the second is to use a check valve to prevent reverse f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/003G01B11/02G01B11/16G01L19/08
CPCG01B11/02G01B11/16G01L19/08G01M13/003
Inventor 景建周雷王宏杨晓明南鹏伟
Owner 渭南美益特发动机减排技术有限公司
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