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A kind of scr system monitoring and fault diagnosis equipment and method

A technology of SCR system and fault diagnosis, which is applied in mechanical equipment, diagnostic device of exhaust gas treatment device, electronic control of exhaust gas treatment device, etc. problems such as low prediction accuracy, to achieve the effect of improving accuracy and practicability

Active Publication Date: 2021-10-15
GUANGZHOU CITY POLYTECHNIC
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Problems solved by technology

[0006] In order to overcome the shortcomings of the inability to accurately predict the failure point of the "SCR" system, single fault prediction and low fault prediction accuracy, the technical problem to be solved by the present invention is to provide a real-time monitoring of the urea amount of the urea pump and realize the logical judgment of the injection amount SCR system monitoring and fault diagnosis method and device

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  • A kind of scr system monitoring and fault diagnosis equipment and method
  • A kind of scr system monitoring and fault diagnosis equipment and method
  • A kind of scr system monitoring and fault diagnosis equipment and method

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Embodiment 1

[0025] Such as Figure 1-4 As shown, a SCR system monitoring and fault diagnosis equipment includes a power supply module, a display touch module, a drive module, a CAN communication module, a short circuit protection module, a data acquisition module and a main control module; After the step-down and rectification of the power module, it provides DC low-voltage working power to the whole equipment; the display touch module mainly collects the data collected by the data acquisition module (such as the size of the urea injection volume, the pressure of the pump chamber, and the temperature of the urea liquid) It is also the main input device of the system, and the debugging of each part of the function and the input of human-computer interaction information are realized through this module; the driving module and the microprocessor are controlled by the data fed back by the data acquisition module The drive module works, so as to control the active control of the urea pump; the...

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Abstract

The invention relates to the technical field of mechanical devices and transportation, in particular to an SCR system monitoring and fault diagnosis equipment and method. The technical problem to be solved by the present invention is to provide a SCR system monitoring and fault diagnosis method and equipment for real-time monitoring of urea pump urea volume and logic judgment of injection volume. In order to solve the above technical problems, the present invention provides such an SCR system monitoring and fault diagnosis equipment, including a power supply module, a display touch module, a drive module, a CAN communication module, a short circuit protection module, a data acquisition module and a main control module; Compared with the "SCR" system detection equipment on the market, the invention realizes the real-time monitoring of urea pump urea volume, realizes the logical judgment of injection volume, and improves the accuracy and practicability of the product.

Description

technical field [0001] The invention relates to the technical field of mechanical devices and transportation, in particular to an SCR system monitoring and fault diagnosis equipment and method. Background technique [0002] At present, relevant national regulations clearly stipulate that heavy-duty diesel vehicles must be equipped with "SCR" (Selective Catalytic Reduction, Selective Catalytic Reduction) system to selectively reduce and control the NOx exhaust of diesel vehicles, and intend to reduce their total exhaust emissions. In actual operation, the system is prone to failure due to insufficient urea injection and failure of system components, causing substantial pollution to the atmospheric environment. [0003] There are mainly two types of fault detection methods for this system. One is to read the flashing code of the "SCR" system fault light by the maintenance personnel, and translate the general fault range according to the fault code table. The other is that the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00
CPCF01N11/00Y02T10/40
Inventor 王文涛王飞汤志华吴晶石良
Owner GUANGZHOU CITY POLYTECHNIC
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