Hitachi, Ltd.

Hitachi Automotive Engineering Co., Ltd.

Toru Tatsuzaki

Hiroshi Kimura

Kazuo Tahara

Toshimi Abukawa

Hisatugu Ishikura

Shuichi Takamatsu

Katsuji Marumoto

Mitsuyuki Hombu

Toshiyuki Koterazawa

Toshiaki Okuyama

Hirohisa Yamamura

Tsutomu Ohmae

Tsutomu Omae

Hiroshisa Yamamura

Seizi Yamashita

Shigeki Saito

Mitsuyuki Honbu

Masato Sakai

Katsuji Murumoto

Toshiyuki Koterazaka

A generator generates two voltage outputs which have different voltage levels. One voltage output from the generator is used for operating a power steering apparatus. Another voltage output from the generator is used for charging a battery which supplies current to other loads.

Motor-driven power steering apparatus

An electric power steering apparatus for a vehicle comprises a steering shaft, an electric motor operable to generate an auxiliary steering force having a magnitude corresponding to a value of electric current supplied thereto, a steering toque sensor for detecting a steering torque applied to the steering shaft, a vehicle weight sensor for detecting a vehicle weight, and a control device. The control device is constituted to increase and decrease the value of electric current to be supplied to the electric motor in accordance with not only the increase and decrease of the value detected by the steering torque sensor but also the increase and decrease of the value detected by the vehicle weight sensor.

Electric power steering apparatus for vehicle

An electric power steering control system includes an electric motor for producing an assisting torque for the vehicle steering system through a reduction gear, a steering torque sensor fitted on the steering shaft, a controller for controlling the input to the motor in accordance with the torque sensor output, a battery for supplying power to the controller, and a voltage step-up circuit connected to the battery for driving the motor at a voltage higher than the battery voltage. The controller drives the motor at a high voltage.

Electric power steering control system

A vehicle height control apparatus responsive to power steering operation is disclosed in which a torque signal indicative of the steering torque imparted to the steering wheel by a driver's operation thereof is used for controlling the power steering system and also for controlling the operation of actuators for adjusting damping force of shock absorber provided to each wheel thereby controlling the height of the vehicle.

Vehicle height control apparatus responsive to power steering operation

Growing community of inventors

Hiratsuka, Japan

Toru Tatsuzaki