Steering force control system for power steering

Details Steering force control system for power steering Steering force control system for power steering

1991-04-17

1992-12-08

Olszewski, Robert P.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180132, B62D 506

Patent

active

051689499

ABSTRACT:
A subpump has its discharge flow rate increased in response to an increase in a vehicle speed. A variable throttle is disposed in a discharge passage from the subpump, and an oil pressure taken from the upstream side of the variable throttle is introduced into a hydraulic reaction chamber to produce a steering action. A main pump has its flow rate increased or decreased in accordance with a number of revolutions thereof, and feeds a pressure oil to a power steering control valve through a passage in which a fixed restriction is disposed. An oil pressure which prevails upstream of the fixed restriction acts upon the variable throttle to change its area of opening, thereby controlling the steering force.

REFERENCES:
patent: 4034825 (1977-07-01), Adams
patent: 4606424 (1986-08-01), Hasegawa
patent: 4619339 (1986-10-01), Futaba et al.
patent: 4632204 (1986-12-01), Honaga et al.
patent: 4691797 (1987-09-01), Miller
patent: 4858713 (1989-08-01), Kawakami et al.

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