Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1987-02-24
1988-10-18
Love, John J.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
280 91, B62D 506
Patent
active
047780231
ABSTRACT:
A rear wheel steering control system for a four wheel steerable vehicle has a controller such as a microcomputer for steering rear wheels through a hydraulic actuator. When a small turning radius is required, the controller steers the rear wheels in an opposite direction to a direction in which the front wheels are steered. The control system further has various sensors such as front wheel angle sensor, rear wheel angle sensor, vehicle speed sensor and gear position sensor for sensing a position of a transmission. From one or more of the sensor output signals, the controller determines whether the vehicle is in a predetermined condition in which the rear wheel steering action in the opposite direction should be restrained in order to prevent the rear end of the vehicle from swinging laterally in the opposite direction and bumping against an adjacent object. If it is determined that the vehicle is in the predetermined condition, the controller steers the rear wheels gradually in the opposite direction.
REFERENCES:
patent: 3633701 (1972-01-01), Le Tourneau
patent: 4263979 (1981-04-01), Sturgill
patent: 4412594 (1983-11-01), Furukawa
patent: 4418780 (1983-12-01), Ito
patent: 4441572 (1984-04-01), Ito
patent: 4476529 (1984-10-01), Nakamura
Diederiks, Jr. Everett G.
Love John J.
Nissan Motor Co,. Ltd.
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