Power steering control valve

Details Power steering control valve Power steering control valve

1996-02-28

1998-12-01

Dickson, Paul N.

Motor vehicles

Steering gear

With fluid power assist

91375A, B62D 508

Patent

active

058425381

ABSTRACT:
A power steering control valve (10) includes inner and outer valve members (30 and 32) which are rotatable relative to each other to control fluid flow to and from a power steering motor. A damping assembly (60) is provided to damp relative movement between the inner and outer valve members (30 and 32). The damping assembly (60) includes a pair of pistons (64 and 66) which are connected with the inner valve member (30) and extend into arcuate grooves (70 and 72) in the outer valve member (32). The pistons (64 and 66) cooperate with the arcuate grooves (70 and 72) in the outer valve member (32) to form variable volume chambers (76, 78, 80 and 82). Upon relative rotation between the inner and outer valve members (30 and 32) in a first (clockwise) direction, the pistons (64 and 66) are moved relative to the outer valve member (32) to contract a pair of chambers (76 and 82) and force fluid from the contracting chambers through restrictors (84 and 90) to a return fluid flow from the power steering motor. At the same time, movement of the pistons (64 and 66) expands a pair of chambers (78 and 80) to induce fluid flow through a second pair of restrictors (86 and 88) into the expanding chambers from the return flow of fluid to the power steering motor.

REFERENCES:
patent: 4034825 (1977-07-01), Adams
patent: 4434866 (1984-03-01), Duffy
patent: 4601358 (1986-07-01), Kozuka et al.
patent: 4718514 (1988-01-01), Hirakushi
patent: 4765427 (1988-08-01), Yonker
patent: 4768630 (1988-09-01), Aubry et al.
patent: 4796715 (1989-01-01), Futaba et al.
patent: 5016723 (1991-05-01), Sano
patent: 5058696 (1991-10-01), Prebay et al.
patent: 5070957 (1991-12-01), Harkrader et al.
patent: 5190119 (1993-03-01), Nomura et al.
patent: 5392875 (1995-02-01), Duffy
patent: 5396969 (1995-03-01), Joerg et al.
patent: 5542343 (1996-08-01), Martin

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