Rear wheels steering control method

Abstract

Abstract PURPOSE:To raise the steering responsiveness of a car, by controlling the rear wheels steering angle comparing with the front wheels steering angle, by using a transfer function calculated from such as a proportional constant, which indicates the proportion of the rear wheels steering angle to the front wheels steering angle, in the stationary state. CONSTITUTION:In a rear wheels steering mechanism, pressure oil from a hydraulic pump 15, is fed into a power cylinder 10 through a servo valve 14, and rear wheels 8 are rotated and steered through piston rods 12 and steering knuckle arms 9. The said servo valve 14 controls the pressure oil, according to the output of a potentiometer 17 for front wheels steering angle sensor, and the output of a potentiometer 22 for feedback. In this case, the rear wheels steering angle is controlled by using a first-order lag transfer function G1(S)=A/(1+T.S) (A=proportional constant, which indicates the proportion of the rear wheels steering angle to the front wheels steering angle, in the stationary state; T=time constant; S=Laplacean), as an electric transfer function of a controller 20 which inputs the output signal of the potentiometer 17.

Inventors

• 👤 Kunio Katada
• 👤 邦男 片田

Bibliographic Details