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
048861383
ABSTRACT:
A hydraulic power steering system having conventional relatively rotatable spool and valve body elements for flow regulation, and an integral electromagnetic mechanism which effectively varies the centering force between the spool and valve body to adjust the level of steering assist provided for a given operator steering input. The electromagnetic mechanism comprises a rotary multipole permanent magnet supported for rotation with one of the spool and valve body elements, a rotary flux conducting element supported for rotation with the other of the spool and valve body elements, and a stationary exciting coil magnetically coupled thereto. The exciting coil is energized so as to produce a variable centering force between the spool and valve body with vehicle speed, which produces a corresponding variation in the driver steering effort.
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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