US 12,092,488 B2
Diagnostic device for a sensor for a vehicle drive shaft
Yannick Leroy, Toulouse (FR); and Thierry Bavois, Toulouse (FR)
Assigned to Vitesco Technologies Gmbh, Regensburg (DE)
Appl. No. 18/285,762
Filed by Vitesco Technologies GmbH, Regensburg (DE)
PCT Filed May 23, 2022, PCT No. PCT/EP2022/063900
§ 371(c)(1), (2) Date Oct. 5, 2023,
PCT Pub. No. WO2022/253614, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 2105670 (FR), filed on May 31, 2021.
Prior Publication US 2024/0219205 A1, Jul. 4, 2024
Int. Cl. F02D 41/00 (2006.01); F02D 41/22 (2006.01); G01D 3/08 (2006.01); G01R 31/00 (2006.01); G01R 31/28 (2006.01)
CPC G01D 3/08 (2013.01) [F02D 41/009 (2013.01); F02D 41/222 (2013.01); G01R 31/007 (2013.01); G01R 31/2829 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A diagnostic device for a sensor for measuring the position of a motor-vehicle drive shaft, said sensor being intended to be placed facing the drive shaft and to generate a signal relating to the position of the drive shaft, the sensor comprising a first wired communication link and a second wired communication link, via which wired communication links the sensor sends the signal, and an average reference voltage, said diagnostic device for a sensor being intended to be electrically connected between the first wired communication link and the second wired communication link and being configured to:
a) receive a first voltage value corresponding to the average voltage in the first wired communication link and a second voltage value corresponding to the average voltage in the second wired communication link;
b) if an absolute value of the difference between the first value and the second value is greater than a predefined tolerance threshold and:
i) if the absolute value of the difference between the first value and the value of the average reference voltage is greater than the absolute value of the difference between the second value and the value of the average reference voltage, detect a short circuit on the first wired communication link,
ii) if the absolute value of the difference between the first value and the value of the average reference voltage is less than the absolute value of the difference between the second value and the value of the average reference voltage, detect a short circuit on the second wired communication link.