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Fault Judgment Method for Output Shaft Speed ​​Sensor of Dual Clutch Transmission

A speed sensor and dual-clutch technology, applied in the field of automobile transmission, can solve problems such as weak robustness and false alarms, and achieve the effects of improving robustness, preventing driving risks, and improving maintenance efficiency

Active Publication Date: 2016-08-31
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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AI Technical Summary

Problems solved by technology

[0005] However, this fault determination method is not robust in signal rationality diagnosis. For example, in the case of interference in the wheel speed signal itself, it may lead to the risk of fault being falsely reported.

Method used

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  • Fault Judgment Method for Output Shaft Speed ​​Sensor of Dual Clutch Transmission

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Embodiment Construction

[0023] refer to figure 1 , in the dual-clutch gearbox output shaft speed sensor failure determination method of this embodiment, the signals used include: the dual-clutch gearbox output shaft speed signal ω detected by the dual-clutch gearbox output shaft speed sensor outp , the dual clutch gearbox input shaft speed signal ω detected by the dual clutch gearbox input shaft speed sensor inp , the first driving wheel speed signal ω detected by the ABS driving wheel speed sensor whl1 and the second driving wheel speed signal ω whl2 , the engine speed signal ω detected by the engine speed sensor engine .

[0024] First, judge the speed signal ω of the output shaft of the dual-clutch gearbox outp The arithmetic mean ω of the speed signal of the drive wheel with ABS whlavg Whether the difference between is within the allowable deviation range. ω whlavg Calculate according to the following equation:

[0025] ω whlavg =(ω whl1 *K 1 +ω whl2 *K 2 ) / 2,

[0026] Among them, K...

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Abstract

The invention provides a method for judging faults of a rotation speed sensor of a double clutch transmission output shaft. The method comprises the following steps: judging whether the difference between arithmetic mean values of rotation speed signals of the double clutch transmission output shaft and rotation speed signals of driving wheels of an ABS is within an acceptable deviation range; when the difference is within the acceptable deviation range, judging whether omega inp is equal to omega outp*igear, wherein omega inp is a rotation speed signal of the double clutch transmission output shaft, omega outp is a rotation speed signal of the double clutch transmission output shaft, and igear is the total transmission ratio of a shift when a double clutch transmission is in stable transmission; when omega inp is not equal to omega outp*igear, judging whether omega engine is equal to omega outp*igear, wherein omega engine is a rotation speed signal of an engine; when omega engine is not equal to omega outp*igear, transmitting a signal for indicating that the rotation speed sensor of the double clutch transmission output shaft has faults. By adopting the method, the false alarm rate of the rotation speed sensor of the double clutch transmission output shaft is greatly reduced.

Description

technical field [0001] The invention relates to the field of automobile transmission, in particular to a fault judging method for a rotational speed sensor of an output shaft of a dual-clutch gearbox. Background technique [0002] The output shaft speed sensor signal of the dual-clutch gearbox is an important signal for measuring the output speed. The reliability of the signal is of great significance to the stable operation of the TCU (Transmission Control Unit, automatic transmission control unit) system. Through the well-designed signal The function of monitoring and diagnosis and identification plays an important role in determining whether the signal actually has a fault, and then determines which fault processing mode the TCU enters. [0003] In terms of electrical signal diagnosis, when the TCU system detects that the signal has faults such as short circuit to power supply, short circuit to ground, or signal disconnection, it will report the corresponding fault code. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/12
CPCF16H61/12F16H2061/1208
Inventor 黄伟左波涛张友皇陈加超
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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