US 12,448,044 B2
Electric power steering device and assisting method thereof
Kentaro Kasuya, Tokyo (JP); Shuichi Okada, Tokyo (JP); and Naoaki Ikemoto, Tokyo (JP)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by Honda Motor Co., Ltd., Tokyo (JP)
Filed on Feb. 12, 2023, as Appl. No. 18/167,871.
Claims priority of application No. 202210294900.6 (CN), filed on Mar. 24, 2022.
Prior Publication US 2023/0303166 A1, Sep. 28, 2023
Int. Cl. B62D 15/02 (2006.01); B62D 6/00 (2006.01); G05B 13/02 (2006.01)
CPC B62D 15/025 (2013.01) [B62D 6/00 (2013.01); G05B 13/0265 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electric power steering device, the electric power steering device being used in a vehicle and executing a steering assisting operation using a motor, comprising:
a lane recognition unit, recognizing lane information of a lane on which the vehicle is travelling;
a steering information sensing unit, sensing steering information; and
an assisting control unit, coupled to the motor, the lane recognition unit, and the steering information sensing unit, controlling the electric power steering device to execute the steering assisting operation according to a steering assisting amount composed of the lane information and the steering information, and when the lane information cannot be recognized, controlling the electric power steering device to execute the steering assisting operation according to a learned steering assisting amount composed of the steering assisting amount during a learning period, wherein the assisting control unit judges whether the lane on which the vehicle is travelling is a straight lane according to the lane information and the steering information, the lane on which the vehicle is travelling during the learning period is the straight lane, the learning period starts when the vehicle is detected traveling on the straight lane, when the assisting control unit judges that the lane on which the vehicle is travelling is the straight lane, the assisting control unit calculates the learned steering assisting amount during the learning period, and when the lane recognition unit cannot recognize the lane information while the vehicle is traveling on the straight lane, the assisting control unit controls the electric power steering device to execute the steering assisting operation according to the learned steering assisting amount calculated during the learning period.