Speed sensor fault diagnosis and processing method

A vehicle speed sensor and fault diagnosis technology, which is applied in the testing/calibration of instruments, speed/acceleration/shock measurement equipment, speed/acceleration/shock measurement, etc., can solve the problems of small fault diagnosis range and low diagnostic accuracy, and achieve The effect of reducing the probability of false positives, wide application range, and high reliability of diagnostic results

Active Publication Date: 2018-03-09
UNITED AUTOMOTIVE ELECTRONICS SYST
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Problems solved by technology

[0006] The purpose of the present invention is to provide a vehicle speed sensor fault diagnosis and processing method to solve the problems of small diagnostic range and low diagnostic accuracy of the vehicle speed sensor fault diagnosis in the prior art

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  • Speed sensor fault diagnosis and processing method
  • Speed sensor fault diagnosis and processing method

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Embodiment Construction

[0033] The fault diagnosis and processing method of the vehicle speed sensor proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0034] Please refer to figure 1 , which is a flow chart of the vehicle speed sensor fault diagnosis and processing method of the present invention. The fault diagnosis and processing method of the vehicle speed sensor is applicable to vehicles with at least driving wheels equipped with wheel speed sensors, and the fault diagnosis and processing method of the vehicle speed sensor includes the following steps:

[0035] S1: Check whet...

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Abstract

The invention provides a vehicle speed sensor fault diagnosis and processing method. When a vehicle speed sensor has an electrical fault, an electrical fault diagnosis method is used to diagnose the fault; for faults other than the electrical fault, a vehicle speed sensor of a driving wheel is mainly utilized to sense the wheel speed as a basis for diagnosing the vehicle speed sensor, by judging validity of the wheel speed and checking whether the average wheel speed is greater than the rotating speed of the vehicle speed sensor in low precision areas, wheel speed invalid areas and the low precision areas of the vehicle speed sensor are screened separately to reduce the vehicle speed misdiagnosis risk; through offline precision verification of an average wheel speed signal of a driving wheel, a fault judgment threshold is reasonably matched so as to reduce the false alarm probability of the vehicle speed sensor fault, and thereby the relatively reasonable final vehicle speed is acquired. The method is advantaged in that the application scope is wide, reliability of the diagnosis result is high, and actual demands can be satisfied.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a fault diagnosis and processing method of a vehicle speed sensor. Background technique [0002] Generally, the vehicle power system includes the engine, gearbox, final drive, differential and so on. Wherein, the gearbox has an output shaft, and a vehicle speed sensor for determining the rotational speed of the output shaft is arranged on the output shaft. The gearbox transmits the engine torque to the output shaft, and then transmits it to Drive the wheels. The vehicle speed signal collected by the vehicle speed sensor is an important parameter for the engine to control the output torque and the transmission controller to calculate the shift line. If the vehicle speed signal is abnormal, the power of the vehicle will change suddenly and the gear will be shifted abnormally. If it is shifted to a high gear during climbing, it will affect the climbing performance of the vehic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/02
CPCG01P21/02
Inventor 王冰雪王振锁杨庆李淑英邹绵意王宇明王治松张宽宽历宝录刘照亮张庆洪
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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