Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1988-12-22
1989-12-12
Marmor, Charles A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180143, 180148, B62D 5083
Patent
active
048861375
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 which tends to restore the spool and valve body to a centered condition, and an integral electromagnetic mechanism which variably opposes 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 have interleaved teeth which are magnetically coupled to the coil to define a magnetic circuit having an inter-tooth working air gap which varies with the relative rotation of the spool and valve body.
REFERENCES:
patent: 4629025 (1986-12-01), Brasier et al.
patent: 4765427 (1988-08-01), Yonker
patent: 4778021 (1988-10-01), Morishita et al.
patent: 4783626 (1988-11-01), Shimizu
Graber David W.
Pawlak Andrzej M.
Zuraski Jeffery A.
General Motors Corporation
Marmor Charles A.
Navarre Mark A.
Yoon Wook
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