Steering gear for vehicle

Abstract

Abstract PURPOSE:To make vibration proofing surely performable by installing a vibration discriminating device discriminating the generation of vibration in a steering control system, and when any vibration in this steering control system is detected, making the gain of a servo amplifier in the control system of a servo valve so as to make it lowerable. CONSTITUTION:A steering gear operated by means of electrohydraulic control finds the steering desired value of a steering wheel 1 on the basis of each output signal out of a steering angle sensor 4, a car speed sensor 6 and a yaw rate sensor 7 by a control circuit 5, and it delivers a voltage signal of this operation steering angle to a servo amplifier 12. And, it controls a servo valve 11 with a control current to be fed out of the servo amplifier 12, feeding a hydraulic cylinder 15 with hydraulic fluid of a flow rate proportionate to the control current, whereby it assists the steering force. In this case, there is provided with a vibration discriminating device 60 which detects vibration in a steering control system from an output signal of the servo amplifier 12. When vibration is detected, a gain of the servo amplifier 12 is controlled so as to be lowered.

Inventors

• 👤 Shigeki Yoshioka

Bibliographic Details