Four-wheel steering device for vehicle

Details Four-wheel steering device for vehicle Four-wheel steering device for vehicle

1983-10-25

1985-11-12

Peters, Jr., Joseph F.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180141, B62D 506

Patent

active

045522391

ABSTRACT:
In the four-wheeled vehicle, both the front and rear wheels are turned in response to operation of the steering wheel. The turning angle of the rear wheels is controlled in accordance with a turning angle ratio characteristic curve defined on a .theta.F-.theta.R plane wherein .theta.F and .theta.R respectively represent the turning angles of the front and rear wheels. The turning angle ratio characteristic curve is substantially a broken line having a positive inclination in the region where the value of the front wheel turning angle .theta.F is smaller than a predetermined value and having a smaller inclination in the region where the value of the front wheel turning angle .theta.F is larger than the predetermined value. The turning angle ratio characteristic curve is changed according to the vehicle speed so that the turning angle ratio .theta.R/.theta.F is increased as the vehicle speed increases.

REFERENCES:
patent: 4295657 (1981-10-01), Sano et al.
patent: 4313514 (1982-02-01), Furukawa et al.
patent: 4406472 (1983-09-01), Furukawa et al.
patent: 4441572 (1984-04-01), Ito et al.

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