Diagnosis method and diagnosis terminal of low desorption pipeline, vehicle and storage medium

A diagnostic method and technology of desorption tubes, which are applied in the diagnosis of low desorption pipelines, vehicles and computer-readable storage media, can solve the problems of reduced accuracy of diagnostic results and susceptibility to other factors, and achieve accurate judgment Effect

Active Publication Date: 2021-02-26
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a diagnostic method, diagnostic terminal, vehicle, and computer-readable storage medium for low desorption pipelines, aiming at solving the problem of low diagnostic pressure

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  • Diagnosis method and diagnosis terminal of low desorption pipeline, vehicle and storage medium
  • Diagnosis method and diagnosis terminal of low desorption pipeline, vehicle and storage medium
  • Diagnosis method and diagnosis terminal of low desorption pipeline, vehicle and storage medium

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[0047]It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0048]Please refer tofigure 1 ,figure 1 It is a schematic diagram of the hardware structure of the diagnostic terminal provided in each embodiment of the present invention. The diagnostic terminal includes components such as a communication module 01, a memory 02, and a processor 03. Those skilled in the art can understand,figure 1 The diagnostic terminal shown in may also include more or less components than those shown in the figure, or a combination of certain components, or a different component arrangement. The processor 03 is respectively connected to the memory 02 and the communication module 01, and a computer program is stored on the memory 02, and the computer program is executed by the processor 03 at the same time.

[0049]The communication module 01 can be connected to external devices through the network. The c...

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Abstract

The invention discloses a diagnosis method and a diagnosis terminal of a low desorption pipeline and a storage medium. The method comprises the following steps of acquiring working parameters of a vehicle; judging whether diagnosis boundary conditions are met or not according to the working parameters; when the diagnosis boundary conditions are met, controlling an electromagnetic valve on the lowdesorption pipeline to be opened according to a preset opening degree value; acquiring voltage change values of a front oxygen sensor on an engine exhaust pipe before and after the electromagnetic valve is opened; judging whether the voltage change value of the front oxygen sensor is greater than or equal to a preset change threshold value or not; if so, determining that the low desorption pipeline has no fault; and if not, determining that the low desorption pipeline has a fault. According to the diagnosis method and the diagnosis terminal of the low desorption pipeline and the storage medium, the problem that the existing scheme for diagnosing the low desorption pipeline through the change of the pressure of an intake manifold when a carbon tank electromagnetic valve is opened is easilyinfluenced by other factors, so that the accuracy of a diagnosis result is reduced is solved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a diagnostic method for a low desorption pipeline, a diagnostic terminal, a vehicle and a computer-readable storage medium. Background technique [0002] The low desorption pipeline system is a commonly used system on naturally aspirated engines. It can transmit the oil-air mixture absorbed by the carbon canister to the intake manifold to participate in the combustion in the cylinder to prevent the carbon canister from being damaged due to oil and gas saturation and the oil and gas Hazards such as leakage to the atmosphere occur, so the diagnosis of low-load desorption pipelines is particularly important. [0003] In the prior art, whether there is leakage in the low desorption pipeline is judged by the change of intake manifold pressure when the carbon canister solenoid valve is opened. In the actual driving process, many factors will cause the change of intake manifold pre...

Claims

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Application Information

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IPC IPC(8): F02M25/08
CPCF02M25/0809
Inventor 迟佳男李凯吴俊峰温敏吴全军张建伟吴代明
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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