US 12,286,153 B2
Power steering controller and power steering control method
Motoya Suzuki, Fujisawa (JP)
Assigned to ISUZU MOTORS LIMITED, Tokyo (JP)
Appl. No. 18/018,834
Filed by ISUZU MOTORS LIMITED, Tokyo (JP)
PCT Filed Aug. 26, 2021, PCT No. PCT/JP2021/031328
§ 371(c)(1), (2) Date Jan. 30, 2023,
PCT Pub. No. WO2022/045242, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-143599 (JP), filed on Aug. 27, 2020.
Prior Publication US 2024/0034408 A1, Feb. 1, 2024
Int. Cl. B62D 15/02 (2006.01)
CPC B62D 15/025 (2013.01) [B62D 15/022 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A power steering controller comprising:
a processor coupled to a memory storing instructions for the processor to function as:
a first override determination part that determines whether automatic steering of a vehicle is possible on a basis of a state of the vehicle;
a second override determination part that determines whether manual steering of the vehicle is possible on the basis of a state of a driver of the vehicle;
a driving mode switching part that switches between an automatic steering mode for automatically steering the vehicle, a manual steering mode for manually steering the vehicle, and a semi-automatic steering mode for automatically steering and manually steering the vehicle, on the basis of a determination result of the first override determination part and a determination result of the second override determination part;
a torque detection part that detects torque generated in a steering wheel of the vehicle; and
a contact detection part that detects whether the driver is touching the steering wheel,
wherein the driving mode switching part switches to the semi-automatic steering mode in a case where:
the first override determination part determines that the automatic steering is not possible because the torque detected by the torque detection part is equal to or greater than a predetermined first threshold value; and
the second override determination part determines that the manual steering is not possible, due to the contact detection part detecting that the driver is not touching the steering wheel.