Honda Motor Co., Ltd.

Kouji Nakamura

Norio Yamazaki

Satoshi Kawabe

Junichi Seto

Kazuhiko Inaba

Shigenobu Sekiya

Masayuki Hagiwara

Masanori Takagi

Masaya Kusatani

Yuichi Shimada

Tomohiro Morikami

Toshiharu Akashi

Akio Ueno

Taku Natsume

An electronic power steering apparatus for a vehicle having a steering mechanism to generate a steering assisting force includes: a steering angle sensor; a steering torque sensor; a target steering torque setting unit for setting a target steering torque based on the detected steering angle; a torque deviation computing unit for computing a torque deviation between the target steering torque and the detected steering torque; a first target current value computing unit for computing a first target current value for generating a steering assisting force by the motor based on the computed torque deviation; and a vehicle speed sensitivity adjusting unit that adjusts the first target current value, at least corresponding to a detected vehicle speed, and outputs the adjusted first current value as a second target current value. The motor control unit controls the motor to generate the steering assisting force based on the second target current value.

Electronic power steering apparatus

In a vehicle control apparatus that cuts off fuel supply during deceleration and engages a lockup clutch, it is determined whether a condition that enables to reduce load of the generator is established, and a desired power generation value of the generator is set to a first voltage value and a disengaging vehicle speed at which the lockup clutch is to be disengaged is set to a first vehicle speed when it is determined that the condition is not established, while the desired power generation value of the generator is set to a second voltage value that is determined based on a detected vehicle speed and the disengaging vehicle speed is set to a second vehicle speed that is lower than the first vehicle speed when it is determined that the condition is established, thereby enhancing fuel consumption performance and giving appropriate performance.

Vehicle control device

Provided is an electric power steering system that prevents the oscillation of the steering wheel at each steering stroke end. If the steering stroke end flag Fse is 1 or if the determination result is Yes in step S, the EPS-ECU () determines if the right steering flag (Fdrc) is 1 in step S. If the determination result is Yes, it is then determined if the steering torque difference base value (Dtsb) is positive in step S. If the determination result of step Sis Yes, the EPS-ECU () uses the steering torque difference base value (Dtsb) as the steering torque difference (Dts) in step S. If the determination result is No, the steering torque difference (Dts) is given by a value 0 in step S, and the control process is concluded.

Electric power steering system

Growing community of inventors

Saitama, Japan

Kouji Nakamura