Rear-wheel steering system for four-wheel steering vehicle

Details Rear-wheel steering system for four-wheel steering vehicle Rear-wheel steering system for four-wheel steering vehicle

1989-12-18

1991-05-28

Marmour, Charles A.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180142, 280 91, 36442405, B62D 506, B62D 715

Patent

active

050185942

ABSTRACT:
A rear-wheel steering system is provided in a four-wheel steering vehicle having at least a front-wheel steering angle sensor, a vehicle speed sensor, a control unit for carrying out rear-wheel steering control in dependency on signals detected by these sensors, and an electric motor controlled by the control unit to steer the rear wheels. This rear-wheel steering system is provided with detecting means for detecting front-wheel steering force, front-wheel lateral force or lateral acceleration of the vehicle. The control unit is provided with a front-wheel neutral point correction means for determining the zero point of the front-wheel steering angle which causes the rear-wheel steering angle to be zero with respect to a signal indicating that the front-wheel steering force, the front-wheel lateral force or the lateral acceleration of the vehicle thus detected by the detecting means is substantially zero.

REFERENCES:
patent: 4645025 (1987-02-01), Ohe et al.
patent: 4722545 (1988-02-01), Gretz et al.
patent: 4781262 (1988-11-01), Nakamura et al.
patent: 4869335 (1989-09-01), Takahashi

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