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A kind of EGR cooler fault diagnosis method, device, equipment and storage medium

A technology for EGR cooler and fault diagnosis, which is applied in the direction of internal combustion engine testing, etc., can solve the problem of being unable to diagnose the carbon deposition fault of the EGR cooler in real time, and achieve the effect of improving cooling efficiency

Active Publication Date: 2022-04-05
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a fault diagnosis method, device, equipment and storage medium for an EGR cooler to solve the technical problem in the prior art that it is impossible to diagnose whether the EGR cooler has a carbon deposition fault in real time

Method used

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  • A kind of EGR cooler fault diagnosis method, device, equipment and storage medium
  • A kind of EGR cooler fault diagnosis method, device, equipment and storage medium
  • A kind of EGR cooler fault diagnosis method, device, equipment and storage medium

Examples

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Embodiment 1

[0076] This embodiment provides a method for diagnosing a fault of an EGR cooler, which is used for diagnosing whether there is a carbon deposition fault in the EGR cooler of an engine. The execution subject of this embodiment is an electronic device, such as a server, a desktop computer, a notebook computer, a tablet computer and other electronic devices that can be used for EGR cooler fault diagnosis.

[0077] Such as figure 2 As shown, it is a schematic flow chart of the EGR cooler fault diagnosis method provided in this embodiment, and the method includes:

[0078] Step 101, obtaining the inlet pressure and outlet pressure of the EGR cooler.

[0079] Among them, the EGR cooler is connected with the engine, and the exhaust gas of the engine enters the EGR cooler through the inlet of the EGR cooler. After the exhaust gas is cooled by the EGR cooler, the cooled exhaust gas enters the engine again through the outlet of the EGR cooler. , wherein the exhaust gas circulation s...

Embodiment 2

[0104] Such as Figure 7 As shown, it is a schematic flow chart of the EGR cooler fault diagnosis method provided in this embodiment. As an implementable manner, on the basis of the first embodiment above, optionally, step 102 specifically includes:

[0105] Step 1021, obtaining the initial resistance coefficient of the EGR cooler;

[0106] Step 1022, determine the dynamic pressure of the EGR cooler according to the EGR flow obtained by the Venturi flowmeter;

[0107] Step 1023, according to the inlet pressure and outlet pressure of the EGR cooler, the dynamic pressure of the EGR cooler and the initial resistance coefficient, determine the correction coefficient of the drag coefficient of the EGR cooler;

[0108] Step 1024, determine the resistance coefficient of the EGR cooler according to the correction coefficient.

[0109] Specifically, the initial value of the resistance coefficient of the new EGR cooler can be obtained based on experimental tests, that is, the initial ...

Embodiment 3

[0124] This embodiment provides a device for diagnosing a fault of an EGR cooler, which is used to implement the method of the first embodiment above.

[0125] Such as Figure 9 Shown is a schematic structural diagram of the EGR cooler fault diagnosis device provided in this embodiment. The EGR cooler fault diagnosis device 30 includes an acquisition module 31 , a determination module 32 and a diagnosis module 33 .

[0126] Among them, the acquisition module is used to obtain the inlet pressure and outlet pressure of the EGR cooler; the determination module is used to calculate the resistance coefficient of the EGR cooler according to the inlet pressure and outlet pressure of the EGR cooler; The drag coefficient of the EGR cooler to determine if the EGR cooler is malfunctioning.

[0127] Optionally, the determination module is specifically configured to determine the dynamic pressure of the EGR cooler according to the EGR flow obtained by the Venturi flowmeter; determine the...

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PUM

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Abstract

The present application provides a fault diagnosis method, device, equipment and storage medium of an EGR cooler, the method comprising: obtaining the inlet pressure and the outlet pressure of the EGR cooler; calculating the The resistance coefficient of the EGR cooler; according to the resistance coefficient of the EGR cooler, it is determined whether the EGR cooler breaks down. It can be seen that the EGR cooler fault diagnosis method is diagnosed when the engine and the EGR cooler are running, and The fault diagnosis is not carried out on the EGR cooler disassembled from the engine, which solves the technical problem in the prior art that it is impossible to diagnose whether the carbon deposition fault occurs in the EGR cooler in real time, and improves the cooling efficiency of the EGR cooler.

Description

technical field [0001] The present application relates to the technical field of engine emission treatment, and in particular to a fault diagnosis method, device, equipment and storage medium of an EGR cooler. Background technique [0002] The exhaust gas recirculation (Exhaust Gas Recirculation, referred to as: EGR) cooler is used to cool part of the exhaust gas returned to the engine cylinder. After the exhaust gas enters the cylinder, it is mixed with the fresh gas in the cylinder and enters the combustion chamber for combustion to reduce the exhaust gas in the vehicle. content of nitrogen oxides. [0003] During the use of the EGR cooler, the exhaust gas recirculated flows through the EGR cooler, and the exhaust gas is cooled in the EGR cooler, so that a certain amount of carbon deposits will be deposited in the EGR cooler during use. The main components of carbon include hydrocarbons, condensed water and soot particle mixture. When there is too much carbon deposit in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/05
CPCG01M15/05
Inventor 代子阳钟跃兰栾军山张晨窦站成马康康
Owner WEICHAI POWER CO LTD