US 11,987,304 B2
Generating steering wheel torques as tactile feedback in vehicle steering systems
Felix Heinrich, Braunschweig (DE); and Dirk Dreyer, Stadthagen (DE)
Assigned to Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed by Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed on May 25, 2021, as Appl. No. 17/329,956.
Claims priority of application No. 102020206703.1 (DE), filed on May 28, 2020.
Prior Publication US 2021/0371009 A1, Dec. 2, 2021
Int. Cl. B62D 6/00 (2006.01); B62D 3/12 (2006.01); B62D 5/04 (2006.01); B62D 15/02 (2006.01)
CPC B62D 6/008 (2013.01) [B62D 5/0481 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for generating a steering wheel torque as tactile feedback on a steering wheel of a vehicle steer-by-wire steering system, comprising:
obtaining a value for a rack force associated with the steer-by-wire steering system;
determining at least a portion of an actuator-generated target steering wheel torque for generating tactile feedback to simulate inertia and/or friction within the steer-by-wire steering system, utilizing a characteristic curve that defines the steering wheel torque as a function of the rack force;
generating, via an actuator coupled to the steering wheel, the tactile feedback based on the defined steering wheel torque on the basis of the target steering wheel torque; and
generating, via the vehicle steer-by-wire steering system, a steering support torque using another characteristic curve that defines a relationship of a steering support torque to a driver-generated steering wheel torque, wherein the characteristic curve relating to the rack force is substantially the inverse of the another characteristic curve.