Rear wheel steering control system for automotive vehicles

Details Rear wheel steering control system for automotive vehicles Rear wheel steering control system for automotive vehicles

1992-09-04

1994-08-16

Focarino, Margaret A.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180142, 36442405, B62D 600

Patent

active

053378504

ABSTRACT:
A rear wheel steering control system for automotive vehicles steers rear wheels of the vehicle with a same-phase angle as the front wheels for a relatively small steering wheel operation angle, and with an opposite-phase angle to the front wheels for a relatively large steering wheel operation angle. The control system serves to mitigate an enhanced understeering tendency of front wheel drive type vehicles during cornering. A delay means is operative in a particular steering wheel operation angle range in which the rear wheels steering angle changes between a maximum same-phase steering angle and a maximum opposite-phase steering angle. The delay means sets a delayed rear wheel steering response characteristic with reference to a manual steering wheel operation, for maintaining a stable maneuverability during a lane change. When the lane change is accompanied by steer-back of the rear wheels with a same-phase angle as the front wheels, an actual cornering state of the vehicle may be detected to generate a delayed cornering state signal which is used to limit the steer-back amount.

REFERENCES:
patent: 4842089 (1989-06-01), Kimrough et al.
patent: 4926954 (1990-05-01), Ataka et al.
patent: 4971175 (1990-11-01), Hamada
patent: 5186273 (1993-02-01), Mori
patent: 5208751 (1993-05-01), Berfeld

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