公开(公告)号：US20230322297A1

公开(公告)日：2023-10-12

申请号：US18118415

申请日：2023-03-07

Applicant: CHINA AUTOMOTIVE SYSTEMS, INC.

Inventor： Haimian Cai ,  Yuchen Lin

IPC: B62D5/30 ,  G01K3/00 ,  B62D15/02 ,  G01L5/22 ,  G07C5/08

CPC classification number: B62D5/30 ,  B62D15/0225 ,  G01K3/005 ,  G01L5/221 ,  G07C5/0808 ,  G07C5/0816 ,  B62D5/14

Abstract: A method for detecting a malfunction in a hydraulic-assisted steering system for a vehicle includes: 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. A system for detecting a malfunction in a hydraulic-assisted steering system for a vehicle includes a torque sensor configured to measure a steering torque, and a controller configured to: determine the steering torque exceeding a threshold torque for a predetermined length of time; and generate a malfunction signal in response to determining the steering torque exceeding the threshold torque for the predetermined length of time.

公开(公告)号：US20240286671A1

公开(公告)日：2024-08-29

申请号：US18443514

申请日：2024-02-16

Applicant: CHINA AUTOMOTIVE SYSTEMS, INC.

Inventor： Haimian Cai ,  Yuchen Lin ,  Luoyan Peng

IPC: B62D5/04 ,  B62D7/15

CPC classification number: B62D5/0463 ,  B62D7/159

Abstract: A method for compensating torque fluctuation in a steering column having at least one universal joint includes: measuring an input steering angle and an output angle of the steering column; determining a steering angular velocity value based on the input steering angle; determining a TAS angular velocity value based on the output angle; determining an angular velocity ratio signal based on a ratio of the steering angular velocity value and the TAS angular velocity value; determining, across a predetermined ranges of values of the input steering angle, a maximum value of the angular velocity ratio signal; determining, based on the maximum value of the angular velocity ratio signal, an equivalent angle and an equivalent phase to characterize the torque fluctuation; determining a compensation torque signal based on the equivalent angle and the equivalent phase; and producing, by an electric motor, a compensation torque based on the compensation torque signal.