Hino Motors, Ltd.

Ryoe Watanabe

Mitsuru Enomoto

There is provided a rear front wheel steering control system for a rear two-axle vehicle, which can steer rear front wheels by means of relatively small sized rear front wheel steering device, and thereby can start a vehicle smoothly. Front wheel steering device and rear front wheel steering device are driven by an engine. A controller controls the engine, and also controls the rear front wheel steering device so as to steer rear front wheels in the same direction as that of front wheels based on the detection outputs of the front steering angle sensor of the front wheel and the vehicle speed sensor. When the vehicle speed sensor detects a vehicle speed lower than a first reference value, and a difference in steering angle between a target steering angle based on the steering angle of the front wheel and an actually-measured steering angle of the rear front wheel is larger than a second reference value, the controller increases the rotational speed of the engine to a third reference value. Also, when the difference in steering angle becomes smaller than the second reference value or when a predetermined time has elapsed, the controller returns the rotational speed of the engine to the original value.

Growing community of inventors

Tokyo, Japan

Ryoe Watanabe