All-wheel steering system

Details All-wheel steering system All-wheel steering system

1995-05-19

1997-03-04

Hurley, Kevin

Motor vehicles

Steering gear

Each wheel steerable

180 2401, 180415, 280426, 280443, B62D 100

Patent

active

056070284

ABSTRACT:
A full-time all wheel steering system is provided whereby the rear wheel angle is determined by the front wheel angle and a relational curve, polynomial equation or set of tabulated values. The front wheel angle is measured and the desired rear wheel angle is calculated by a programmable controller. If the desired rear wheel angle is not sufficiently close to the actual rear wheel angle, the controller means sends a signal which results in adjustment of the rear wheel angle. The desired rear wheel angle may be a function of the vehicle speed as well as the front wheel angle. A dead band may be employed which maintains the rear wheels in a straight ahead position when the front wheel angle does not exceed the dead band value. The maximum rear wheel cramp angle may also be controlled as a function of vehicle speed. The system is applicable to passenger cars, trucks and tractor-trailer rigs.

REFERENCES:
patent: 4645025 (1987-02-01), Ohe et al.
patent: 4657102 (1987-04-01), Kanazawa et al.
patent: 5048629 (1991-09-01), Abe et al.
patent: 5282641 (1994-01-01), McLaughlin
patent: 5329451 (1994-07-01), Notsu

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