Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1985-01-28
1987-05-19
Love, John J.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
91368, 91385, 180142, 280 91, 364424, B62D 500
Patent
active
046660135
ABSTRACT:
A wheeled vehicle is equipped with a feedforward steering control system which steers the vehicle through front or rear road wheels in accordance with a driver's steering input such as an angular displacement of a steering wheel, and a negative feedback system which senses a turning behavior of the vehicle such as a yaw rate or a lateral acceleration, and steers the vehicle through the front or rear wheels in such a negative direction as to reduce the turning behavior. The feedforward system may control the angular direction of the front or rear wheels in accordance with a linear combination of the steering input and the time derivative of the steering input, or may control the angular directions of both of the front and rear wheels in accordance with different transfer functions between the steering input and the front and rear wheel angles. The negative feedback system is combined with the feedforward system in various ways to provide desired characteristics of the turning behavior. The negative feedback quantity determined by the negative feedback system may be proportional to the sensed turning behavior, or may be determined in accordance with the difference between the sensed turning behavior, and the reference turning behavior calculated from the vehicle speed and steering input.
REFERENCES:
patent: 2597259 (1952-05-01), Pray
patent: 3866706 (1975-02-01), Lincke et al.
patent: 4418780 (1983-12-01), Ito et al.
patent: 4441572 (1984-04-01), Ito et al.
Fukunaga Yukio
Irie Namio
Kuroki Junsuke
Nakamura Kenji
Shibahata Yasuji
Hill Mitchell J.
Love John J.
Nissan Motor Co,. Ltd.
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