US 12,187,362 B2
Steering control device and method for vehicle
TaeHyung Sun, Gyeonggi-do (KR); and Tae Sik Kim, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed on Sep. 1, 2022, as Appl. No. 17/900,869.
Claims priority of application No. 10-2021-0116211 (KR), filed on Sep. 1, 2021.
Prior Publication US 2023/0068424 A1, Mar. 2, 2023
Int. Cl. B62D 5/04 (2006.01); B62D 6/00 (2006.01)
CPC B62D 5/0484 (2013.01) [B62D 5/0469 (2013.01); B62D 6/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A steering control device of a vehicle, comprising:
a condition determining unit determining a steering ratio change condition by determining whether a failure or emergency steering occurs in a steering motor or steering motor control device of the vehicle equipped with a steer-by-wire system;
a steering ratio change unit changing an average steering ratio using a preset virtual C-factor when the steering ratio change condition is determined to be met; and
a controller controlling a steering motor output to adjust a rack stroke and a rack speed based on the changed average steering ratio,
wherein the controller controls to repeatedly generate the steering motor output with different values at a preset period by applying the changed average steering ratio, and
wherein one of the different values is set to 0% of the steering motor output, and another of the different values is set to 100% of the steering motor output.