Rear wheel steering control device for front and rear wheel steering car

Abstract

Abstract PURPOSE:To reduce energy loss of a vehicle by stopping the control for rear wheel steering when a front wheel steering is less than a designated value, a rear wheel steering is less than a designated value and the state continues for a preset time within a range where a speed is judged to be intermediate. CONSTITUTION:A rear wheel steering device B is constructed so that a control valve device 24 is driven by a step motor 23 controlled by an electric control device C to control the supply and discharge of oil pressure to a power cylinder 40, thereby steering right and left rear wheels RW1, RW2 through a relay rod 31. The electric control device C has a rear wheel steering control circuit 85 adapted to generate a control signal according to a difference between a target rear wheel steering and an actual rear wheel steering, which are obtained from a target steering ratio and a front wheel steering determined according to a speed. In this case, when the speed is intermediate, a front wheel steering is less than a designated value, a rear wheel steering is less than a designated value, and the state continues for a preset time, the control for rear wheel steering is stopped.

Inventors

• 👤 Norio Komoda

Bibliographic Details