Steering force controller for power steering system

Abstract

Abstract PURPOSE:To achieve the optimal control of steering characteristic by making the steering feeling heavy as the car speed or the steering angle increases while making light as the angular steering speed increases. CONSTITUTION:Power steering system will control supply/discharge of pressure fluid by rotating a steering wheel 19 and controlling the rotation of servo valve 14 through steering shaft 17 thus to transmit the sterring torque increased through power cylinder 15 to the steering wheel. Pressure fluid is fed from a pump 22 to be driven through an engine. Here, flow control valve system 40 including first solenoid valve 48 for controlling the delivery of pump 22 and second solenoid valve 20 for opening/closing the oil path communicating between the left and right chambers of power cylinder 15 are provided. The solenoid valves 48, 20 will make the feeling of steering wheel heavy as the car speed and the steering angle will increase while to make light as the angular steering speed will increase.

Inventors

• 👤 Shigeo Tanooka
• 👤 田ノ岡　茂男
• 👤 Yutaka Mori
• 👤 豊 森
• 👤 Akihiro Ono
• 👤 明浩 大野
• 👤 Akira Hasegawa
• 👤 晃 長谷川

Bibliographic Details