US 12,351,253 B2
System and method to detect malfunction in an electronic controlled hydraulic assistance steering system
Haimian Cai, Ann Arbor, MI (US); and Yuchen Lin, Troy, MI (US)
Assigned to CHINA AUTOMOTIVE SYSTEMS, INC., Wuhan (CN)
Filed by CHINA AUTOMOTIVE SYSTEMS, INC., Wuhan (CN)
Filed on Mar. 7, 2023, as Appl. No. 18/118,415.
Claims priority of provisional application 63/322,663, filed on Mar. 23, 2022.
Prior Publication US 2023/0322297 A1, Oct. 12, 2023
Int. Cl. B62D 5/30 (2006.01); B62D 15/02 (2006.01); G01K 3/00 (2006.01); G01L 5/22 (2006.01); G07C 5/08 (2006.01); B62D 5/14 (2006.01)
CPC B62D 5/30 (2013.01) [B62D 15/0225 (2013.01); G01K 3/005 (2013.01); G01L 5/221 (2013.01); G07C 5/0808 (2013.01); G07C 5/0816 (2013.01); B62D 5/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for detecting a malfunction in a hydraulic-assisted steering system for a vehicle, comprising:
measuring a steering torque;
determining the steering torque exceeding a threshold torque for a predetermined length of time; and
generating a malfunction signal in response to the determining the steering torque exceeding the threshold torque for the predetermined length of time;
determining at least one of: a steering angular position of the hydraulic-assisted steering system, a steering angle speed of the hydraulic-assisted steering system, or a temperature in the hydraulic-assisted steering system;
determining at least one of: the steering angular position being less than an angular position threshold value, the steering angle speed being less than an angular speed threshold value, or the temperature in the hydraulic-assisted steering system being greater than a fluid temperature threshold value; and
selectively enabling generating the malfunction signal in response to the determining the at least one of: the steering angular position being less than the angular position threshold value, the steering angle speed being less than the angular speed threshold value, or the temperature in the hydraulic-assisted steering system being greater than the fluid temperature threshold value.