Power steering device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKimiaki Ono, Ikuo Kushiro
Life of this patent
Estimating the term…
Abstract
A power steering device sets an applied friction torque applied to a steering wheel based on a real steering angle and a target steering angle, and performs a control of applying the applied friction torque to the steering wheel. An applied friction torque changing unit changes the applied friction torque, which is calculated from the real steering angle and the target steering angle, when the vehicle reverses. Concretely, the unit changes the applied friction torque to a smaller value when the vehicle reverses than that when the vehicle advances. Thereby, it is possible to decrease the applied friction torque properly when the vehicle reverses, and it become possible to improve the maneuverability of the steering wheel.
Claims5
A power steering device mounted on a vehicle, comprising:
- a friction torque setting unit which sets a friction torque applied to a steering wheel based on operating condition of the vehicle;
- a target steering angle setting unit which sets a target steering angle based on the friction torque;
- a torque applying unit which sets an applied friction torque based on a deviation between the target steering angle and a steering angle, and which performs a control of applying the applied friction torque to the steering wheel;
- and
- an applied friction torque changing unit which changes the applied friction torque, when a vehicle reverses, to a value smaller than the applied friction torque applied when the vehicle advances.
Dependencies are inferred from the claim text.