Electromagnetic control apparatus for varying the driver steerin

Details Electromagnetic control apparatus for varying the driver steerin Electromagnetic control apparatus for varying the driver steerin

1990-10-09

1991-12-10

Marmor, Charles A.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

180141, 180148, B62D 5083

Patent

active

050709569

ABSTRACT:
A hydraulic power steering system having conventional relatively rotatable spool and valve body elements for flow regulation, a mechanically resilient element for generating a mechanical centering force in relation to the relative rotation of the spool and valve body to a centered condition, and an integral electromagnetic mechanism which variably assists the mechanical centering force to adjust the level of operator steering input required to produce a given level of power assist. The electromagnetic mechanism comprises an energized coil and a pair of flux conducting elements supported for rotation with the spool and valve body, respectively. The flux conducting elements are radially spaced annular elements with opposed teeth, which elements are magnetically coupled to the coil to define a magnetic circuit having an intertooth working air gap which varies the magnetic reluctance of the circuit with the relative rotation of the spool and valve body such that the teeth are aligned and the reluctance minimized when the spool and valve body are centered.

REFERENCES:
patent: 4778021 (1988-10-01), Morishata et al.
patent: 4871040 (1989-10-01), Zuraski et al.
patent: 4886137 (1989-12-01), Pawlak et al.
patent: 4886138 (1989-12-01), Graber et al.
Patent Abstracts of Japan, vol. 011086, Apr. 17, 1985, Publication No. 61241271, Isamu, Chikuma, "Steering Force Control Device for Power Steering Device".

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