Method and device for controlling rear-wheel steering of automot

Details Method and device for controlling rear-wheel steering of automot Method and device for controlling rear-wheel steering of automot

1989-02-21

1990-12-18

Black, Thomas G.

Boots, shoes, and leggings

180140, 280 91, B62D 602

Patent

active

049791150

ABSTRACT:
In an automotive vehicle having a four-wheel steering system in which, at least in the low and medium vehicle speed range, the rear wheels are steered in the reverse-phase direction relative to the front wheels in accordance with the steering force or steering angle of the front wheels and with the front-wheel steering speed. The method comprises the steps of deciding at low and medium vehicle speeds, a rear-wheel steering speed reference value determined in dependence on the front-wheel steering speed, increasing the reverse-phase direction steering speed of the rear wheels for low front-wheel steering speeds, and reducing the reverse-phase direction steering speed of the rear wheels for high front wheel steering speeds. The reference value of the rear-wheel steering speed in a large range of the front-wheel steering speed is controlled to be zero or to be in the coincident-phase direction. The reference value is also varied in the direction for reducing the degree of the reverse-phase direction as the vehicle speed increases, with the vehicle speed as a parameter.

REFERENCES:
patent: 4657102 (1987-04-01), Kanazawa et al.
patent: 4687214 (1987-08-01), Uno
patent: 4768603 (1988-09-01), Sugiyama et al.
patent: 4779693 (1988-10-01), Takahashi et al.
patent: 4796904 (1989-01-01), Kubo et al.
patent: 4805939 (1989-02-01), Kanazawa et al.
patent: 4811805 (1989-03-01), Yoshida et al.
patent: 4828064 (1989-05-01), Furutani et al.

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