Auxiliary power steering for motor vehicles

Details Auxiliary power steering for motor vehicles Auxiliary power steering for motor vehicles

1978-07-11

1980-02-05

Peters, Jr., Joseph F.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

B62D 508

Patent

active

041868188

ABSTRACT:
A dual hydraulic system comprising two independent power steering hydraulic circuits is provided wherein a first hydraulic circuit is used primarily for normal steering and a second hydraulic circuit is used where increased steering power is needed as in rough terrain driving or in parking a vehicle. The arrangement provides for each circuit carrying about half the increased load. Respective valve mechanisms under operator control via a steering wheel controls pressure and exhaust of the double acting power cylinders of the respective circuits. Actuation of the two valve mechanisms is effected in a sequential order so that ordinarily the first hydraulic circuit is operative, followed by the operation of the second hydraulic circuit responsive to increase in steering load as would be occasioned in cross country rough terrain driving or in a vehicle parking situation.

REFERENCES:
patent: 3180233 (1965-04-01), Jablonsky
patent: 3602101 (1971-08-01), Jablonsky
patent: 3602327 (1971-08-01), Garrison
patent: 3822759 (1974-07-01), Sheppard
patent: 3848693 (1974-11-01), Sheppard

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