Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Tomoaki Sugano

Osamu Tsurumiya

Hiroaki Horii

Hisao Asaumi

Fumihiro Morishita

Shinji Suto

Hirokazu Kitazawa

Junichi Yoshida

Hiroshi Furumi

Yoshio Kakizaki

Kazuhiko Inaba

Hironobu Kiryu

Toshio Yahagi

Atsushi Kurauchi

Kazuya Sakurai

Makoto Murata

Susumu Ohta

Kazunari Okada

Masakazu Shiraishi

Nobuyuki Imaizumi

Yoshihiro Iwagama

A turning motion control system for a vehicle includes an actuator, and an actuator control device for controlling the actuator so that an actual turning motion state of the vehicle becomes close to a target turning motion state. The actuator control device is designed so that its control-permitted state and its control-stopped state can be switched from one to another through a switching device operated by a driver. When an air-pressure decreased state detecting device has detected an air-pressure decreased state, the actuator control device carries out the control of the operation of the actuator, irrespective of a switching mode of the switching device. Thus, even if an air-pressure decrease or an abnormality is generated in any of wheels in a state in which the turning motion control by the actuator has been stopped, the stability of the vehicle can be ensured.

Turning motion control system for vehicle

Steering apparatus includes at least one motor for generating a steering assisting force in a direction to steer a steerable wheel, two drive circuits having respective switching elements for PWM-controlling the motor, and a controller for differentiating, between the drive circuits, a control frequency at which the switching element is switched on and off. The differentiated PWM switching timing can effectively reduce switching noise and magnetostrictive sound of the motor.

Steering apparatus

A motor driving method for a steering apparatus for applying an auxiliary steering force to a steering system with two motors. When the two motors are driven, a first one of the two motors is operated first. Thereafter, the other, second motor is driven, whereby smooth steering is effected.

Steering system for vehicle

Steering apparatus for transmitting a driving force of a motor through a gear mechanism to a rack shaft of a steering system and applying the driving force to steering road wheels in a steering direction. The apparatus has first and second motors. In the transmission of driving forces from output shafts of the first and second motors to the rack shaft, the phases of the two motors are essentially staggered by 180 degree.

An electric power steering apparatus with a plurality of motors for applying a force to steering road wheels in a steering direction with mechanism which applies an increase in allocation of auxiliary steering force to an operating motor when at least one of the motors has failed.

An electric power steering apparatus comprises an electric motor a vehicle speed detecting section (vehicle speed sensor) VS, a shifting state detecting section for detecting a shifting state of the vehicle, an engine rotational speed detecting section (engine rotational speed sensor) ES, and a motor control section (controller) for controlling drive of the electric motor The motor control section includes a failure determination section (vehicle speed sensor failure determination section) for determining failure of the vehicle speed detecting section on the basis of a vehicle speed, a shifting state and an engine rotational speed. The failure determination section determines that the vehicle speed detecting section VS malfunctions if the engine rotational speed is equal to or greater than a predetermined rotational speed for a determinative continuous-time and/or a first determinative integrated time while the vehicle speed is zero and the shifting state is a vehicle driving state.

Electric power steering apparatus

Growing community of inventors

Wako, Japan

Tomoaki Sugano