Full hydraulic power steering apparatus

Details Full hydraulic power steering apparatus Full hydraulic power steering apparatus

1990-06-13

1991-06-04

Hill, Mitchell J.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

60384, 91467, 180142, B62D 506

Patent

active

050206184

ABSTRACT:
A full hydraulic power steering apparatus is provided of the type including a steering unit (2) and a steering cylinder (5). Pressurized fluid is supplied to the steering unit (2) from a pump (6) and compensating valve (10) through a pressure line (8). Conduits (103, 104) communicate from the pressure line (8) to a pair of amplification ports (38, 39) through a pair of open-close valves (105, 106) and check valves (108, 109). A pair of detection members (101, 102) sense the positions of the input handle (1) and the steering cylinder (5), and a controller (100) generates electrical input signals to control operation of the valves (105, 106) to correct any short or over condition of the cylinder (5) relative to its target position as determined by the position of the input handle (1).

REFERENCES:
patent: 4703819 (1987-11-01), Hosotani
patent: 4759182 (1988-07-01), Haarstad

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