US 12,473,025 B2
Method and control apparatus for operating an actuator of a steer-by-wire steering system of a motor vehicle
Ingo Dasch, Gräfelfing (DE); Dominik Vogt, Meckenbeuren (DE); Luc Diebold, Magstadt (DE); Magnus Rau, Kirchheim unter Teck (DE); and Björn Spangemacher, Aidlingen (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Appl. No. 18/261,375
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
PCT Filed Oct. 26, 2021, PCT No. PCT/EP2021/079592
§ 371(c)(1), (2) Date Jul. 13, 2023,
PCT Pub. No. WO2022/152417, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 10 2021 200 370.2 (DE), filed on Jan. 15, 2021.
Prior Publication US 2024/0067266 A1, Feb. 29, 2024
Int. Cl. B62D 7/15 (2006.01)
CPC B62D 7/159 (2013.01) 16 Claims
OG exemplary drawing
 
1. A method for operating an actuator of a steer-by-wire steering system of a motor vehicle at speeds from standstill to parking and/or maneuvering, the method comprising the following steps:
detecting a current speed of the motor vehicle, the current speed in a range from standstill to a parking and/or maneuvering speed;
determining a limited steering angle as a function of at least the current speed;
detecting a steering angle request for recording a change in a steering angle as well as a rate of change of the steering angle; and
controlling the actuator to set the steering angle of at least one wheel, at least as a function of the steering angle request and taking into account the limited steering angle so that loads within the actuator, due to a buildup of preload between a tire and a roadway and/or between the actuator and a steering linkage, are reduced.