Electro/pneumatic power steering system

Details Electro/pneumatic power steering system Electro/pneumatic power steering system

1984-11-13

1986-11-25

Bertsch, Richard A.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180 791, B62D 504

Patent

active

046243364

ABSTRACT:
An electro-pneumatic power steering system for an automotive vehicle having a source of pressurized air. The power steering system having a torque sensor generating a torque signal indicative of the torque applied to the vehicles mechanical steering mechanism, a controller generating a pair of mutually exclusive pulse train signals indicative of the direction and magnitude of the applied torque, a pneumatic cylinder linked to the vehicle's mechanical steering mechanism, and a pair of electrically actuated proportional valves for pressurizing one or the other end of the pneumatic cylinder in response to one or the other of the mutually exclusive pulse train signals. The proportional valves venting the opposite ends of the pneumatic cylinder to the atmosphere in the absence of either pulse train signal removing the authority of the power steering system about the zero torque level.

REFERENCES:
patent: 2553940 (1951-05-01), Quartullo
patent: 2775132 (1956-12-01), Orr et al.
patent: 3426863 (1969-02-01), Hanson
patent: 4437532 (1984-03-01), Nakamura et al.
patent: 4448275 (1984-05-01), Kilagawa et al.
patent: 4509611 (1985-04-01), Kade et al.

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