US 12,085,476 B2
Method for monitoring at least one bearing of a motor vehicle, in particular of a motorized vehicle, and motor vehicle
Bernhard Karl, Gaimersheim (DE); and Felix Winkelmeyr, Ingolstadt (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 17/290,854
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Dec. 19, 2019, PCT No. PCT/EP2019/086388
§ 371(c)(1), (2) Date May 3, 2021,
PCT Pub. No. WO2020/156745, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10 2019 201 216.7 (DE), filed on Jan. 31, 2019.
Prior Publication US 2021/0389213 A1, Dec. 16, 2021
Int. Cl. G01M 13/04 (2019.01); B60W 50/14 (2020.01); G01M 17/007 (2006.01)
CPC G01M 13/04 (2013.01) [B60W 50/14 (2013.01); G01M 17/007 (2013.01); B60W 2050/143 (2013.01); B60W 2520/105 (2013.01); B60W 2520/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for monitoring a bearing of a motor vehicle, comprising the bearing and an electric machine, wherein the motor vehicle can be operated by the electric machine, comprising:
supplying the electric machine with an alternating electric current, which is made available by power electronics of the motor vehicle associated with the electric machine, whereby the electric machine is operated as an electric motor by which the motor vehicle is operated;
detecting the alternating current provided by the power electronics by at least one alternating current sensor;
determining at least one torque made available by the electric motor for cranking the motor vehicle as a function of the detected alternating current;
monitoring the bearing as a function of the determined torque; and
inferring that wear of the bearing has exceeded a predefined limit after the determined torque exceeds a predefined limit value.