Motor-driven type front and rear wheel steering apparatus

Details Motor-driven type front and rear wheel steering apparatus Motor-driven type front and rear wheel steering apparatus

1990-05-16

1991-11-26

Marmor, Charles A.

Motor vehicles

Compensating devices

180140, 180142, B62D 504

Patent

active

050675770

ABSTRACT:
A motor-driven type front and rear wheel steering apparatus which comprises a steering sensor to detect at least one of a steering torque and a steering angle, a motor-driven type power-assisted steering unit to assist the steering of the front wheels in response to a signal from the steering sensor, a motor-driven type rear wheel steering unit to drive the steering of the rear wheels in response to at least one signal of a signal indicating the steering torque and a signal indicating the steering angle which are generated from the steering sensor, and a control unit which receives a plurality of signals from each of the steering sensor, a vehicle speed sensor, a motor turning angle speed sensor and a rear wheel steering angle sensor to control the motor-driven type power-assisted steering unit and the motor-driven type rear wheel steering unit, wherein the control unit actuates only the motor-driven type power-assisted steering unit when the automobile stops or runs at a low speed, and actuates either one between the motor-driven type power-assisted steering unit and the motor-driven type rear wheel steering unit when the automobile runs at an intermediate speed or at a high speed.

REFERENCES:
patent: 4313514 (1982-02-01), Furukawa et al.
patent: 4597462 (1986-07-01), Sano et al.
patent: 4640379 (1987-02-01), Shibahata et al.
patent: 4724916 (1988-02-01), Morishita et al.
patent: 4753310 (1988-06-01), Hashimoto
patent: 4782907 (1988-11-01), Morishita et al.
patent: 4786065 (1988-11-01), Donges et al.
patent: 4811969 (1989-03-01), Sugiyama

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