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Fault detection method and system and vehicle

A fault detection and automotive technology, applied in braking safety systems, vehicle components, brakes, etc., can solve the problems of single fault detection method and low real-time requirements for fault detection, and achieve the effect of improving accuracy

Inactive Publication Date: 2018-09-28
GEELY AUTOMOBILE INST NINGBO CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, most of the fault detection methods for vacuum tanks are used in traditional vehicles or hybrid vehicles. Because the engine provides vacuum assistance, the real-time requirements for fault detection are not high. down to detect

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  • Fault detection method and system and vehicle
  • Fault detection method and system and vehicle
  • Fault detection method and system and vehicle

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Embodiment approach

[0038] When detecting the air leakage of the vacuum tank of the car, the vacuum sensor will send the detected vacuum degree in the vacuum tank to the VCU in real time, but the brake signal will be sent to the VCU after the user steps on the brake, that is, In other words, for the VCU, the vacuum degree of the vacuum tank can be obtained in real time, but the brake signal may not be received at any time. Therefore, as an implementation, the VCU first judges whether the vacuum degree of the vacuum tank meets the first preset condition, specifically, when the vacuum degree of the vacuum tank acquired by the VCU in real time is greater than the first preset value at a certain moment , the VCU starts to judge whether the vacuum degree of the vacuum tank meets the first preset condition. When the vacuum degree of the vacuum tank acquired by the VCU in the subsequent first preset time period is greater than the first preset value, the VCU That is to say, when the vacuum degree of the...

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Abstract

The embodiment of the invention provides a fault detection method and system and a vehicle, and relates to the technical field of vehicle control. The method comprises the step that when the vacuum degree of a vacuum tank satisfies a first preparatory condition and the number of brake of the vehicle meets a second preparatory condition, the vacuum tank is determined to be with an air leaking fault. The fault detection method and system and the vehicle can improve the accuracy of the air leaking fault detection of the vacuum tank.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a fault detection method, system and automobile. Background technique [0002] Since pure electric vehicles do not have an engine to provide vacuum, the role of the vacuum pump is greatly increased. If the vacuum tank or vacuum sensor fails during driving, it will threaten the personal safety of the driver, so the fault detection of the vacuum tank is particularly important. [0003] In the prior art, most of the fault detection methods for vacuum tanks are used in traditional vehicles or hybrid vehicles. Because the engine provides vacuum assistance, the real-time requirements for fault detection are not high. down to detect it. Contents of the invention [0004] The purpose of the present invention is to provide a fault detection method, system and automobile, which can improve the accuracy of vacuum tank air leakage fault detection. [0005] In order to achieve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/22B60T13/52
CPCB60T17/22B60T13/52
Inventor 项南军卢耀云
Owner GEELY AUTOMOBILE INST NINGBO CO LTD