Variable-orifice, servo-solenoid valve for a variable-assist pow

Details Variable-orifice, servo-solenoid valve for a variable-assist pow Variable-orifice, servo-solenoid valve for a variable-assist pow

1990-04-27

1991-07-09

Kwon, John T.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

One path includes restriction

60401, 60463, 91375A, 91467, 180143, 251282, F15B 1304

Patent

active

050295136

ABSTRACT:
A power steering system for a wheeled vehicle comprising a fluid motor connected to dirigible wheels of the vehicle, a power steering pump and a steering valve structure situated in flow delivery and flow return passages that connect the pump with the fluid motor, the valve structure including a pilot-operated solenoid valve means that controls the bypass flow between the supply and return sides of the pump wherein a solenoid actuator is adapted to apply a vehicle speed sensitive force on a pilot valve portion of the valve which develops valve actuating forces on a flow control portion of the valve wherein the latter is speed conscious only and does not depend upon flow to and from the pump nor upon the steering pressure for the fluid motor.

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