Four-wheel steering control system for vehicle

Details Four-wheel steering control system for vehicle Four-wheel steering control system for vehicle

1985-01-28

1987-11-10

Love, John J.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180141, 180142, 180143, 280 91, B62D 504, B62D 506

Patent

active

047051310

ABSTRACT:
A vehicle steering control system for steering both front and rear wheels is so arranged that a transfer function between a driver's steering input and a front wheel steering angle, and a transfer function between the steering input and a rear wheel steering angle are differentiated from each other so as to obtain an optimum cornering characteristic of the vehicle. The system has a steering input sensor, a vehicle speed sensor, means for determining the transfer function for the front wheels from a steering frequency and a vehicle speed, means for determining the transfer function of the rear wheels, a front wheel actuator for steering the front wheels, and a rear wheel actuator for steering the rear wheels. The means for determining the transfer function of the rear wheels may be an electronic circuit, or a hydraulic fluid flow restrictor such as an orifice, or a mechanical gearing.

REFERENCES:
patent: 4105086 (1978-08-01), Ishii et al.
patent: 4373603 (1983-02-01), Nelson
patent: 4412594 (1983-11-01), Furukawa et al.
patent: 4418780 (1983-12-01), Ito et al.
patent: 4440254 (1984-04-01), Shibahata et al.
patent: 4441572 (1984-04-01), Ito et al.

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