Apparatus for controlling steer angle of rear wheels of vehicle

Details Apparatus for controlling steer angle of rear wheels of vehicle Apparatus for controlling steer angle of rear wheels of vehicle

1985-05-15

1988-01-19

Lall, Parshotam S.

Boots, shoes, and leggings

180140, 180142, 280 91, B62D 506

Patent

active

047207906

ABSTRACT:
A rear wheel steer angle controlling apparatus for vehicles having steerable front and rear wheels, adapted for controlling the steer angle of rear wheels in response to the operation of the steering wheel for steering the front wheels. When the steering wheel is operated quickly, a rear wheel steer angle is formed in the counter direction to the direction of the front wheel steer angle, so that the response to the steering input for turning the vehicle is improved. Conversely, when the steering wheel is operated slowly, a rear wheel steer angle is formed in the same direction as the front wheel steer angle, thus enhancing the stability of the vehicle running straight. When the vehicle is running at a high speed, the rear wheel steer angle is formed always in the same direction as the front wheel steer angle regardless of the speed of operation of the steering wheel, so that the steering stability during high speed running is improved. When a yawing moment is generated due to a disturbance such as lateral wind, the rear wheel steer angle is automatically controlled in such a manner as to negate the yawing moment, thus compensating for the lateral displacement of the vehicle without requiring correcting steering operation by the driver.

REFERENCES:
patent: 4418780 (1983-12-01), Ito et al.
patent: 4441572 (1984-04-01), Ito et al.
patent: 4522417 (1985-06-01), Sano et al.
patent: 4527654 (1985-07-01), Shibahata et al.
patent: 4552239 (1985-11-01), Kanazawa et al.
patent: 4566710 (1986-01-01), Furukawa et al.
patent: 4572316 (1986-02-01), Kanazawa et al.
patent: 4597462 (1986-07-01), Sano et al.
patent: 4598788 (1986-07-01), Serizawa et al.

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