US 12,084,121 B2
Steer-by-wire steering system, method for operating a steer-by-wire steering system and vehicle
Johannes Albrecht, Munich (DE); and Matthias Schoelzel, Munich (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/786,683
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Dec. 8, 2020, PCT No. PCT/EP2020/085086
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/122160, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 10 2019 135 047.6 (DE), filed on Dec. 19, 2019.
Prior Publication US 2023/0017618 A1, Jan. 19, 2023
Int. Cl. B62D 5/00 (2006.01); B62D 5/04 (2006.01); B62D 6/00 (2006.01); B62D 15/02 (2006.01)
CPC B62D 5/006 (2013.01) [B62D 6/008 (2013.01); B62D 5/0484 (2013.01); B62D 6/002 (2013.01); B62D 15/0215 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A steer-by-wire steering system for steering at least one steerable vehicle wheel of a vehicle, comprising:
a steering input device for a steering input by a driver;
a feedback actuator installation for generating a steering input dependent and/or driving state dependent defined feedback steering torque at the steering input device;
a steering assembly connectable to the at least one steerable vehicle wheel and having a steering actuator installation;
a control installation;
a feedback actuator monitoring installation; and
a synchronization monitoring installation;
wherein the feedback actuator monitoring installation, in at least one operating state of the steer-by-wire steering system, is configured for identifying at least one state of the feedback actuator installation, in particular at least one error state;
wherein the control installation, in at least one operating state of the steer-by-wire steering system, is configured for actuating the steering actuator installation as a function of a steering input and as a function of a state of the feedback actuator installation;
wherein the synchronization monitoring installation, in at least one operating state of the steer-by-wire steering system, is configured for determining a synchronization offset between a current position of the steering input device and a current position of the steering assembly, the steering actuator installation and/or the at least one steerable vehicle wheel; and
wherein the control installation, in at least one operating state of the steer-by-wire steering system, is further configured for actuating the steering actuator installation further as a function of the synchronization offset determined by the synchronization monitoring installation, such that a corrected wheel steering movement is effected when reaching a straight-ahead reference position of the steering input device, and a further steering input is performed by the driver.