Valves and valve actuation – Electrically actuated valve – Having means to produce proportional flow
Patent
1992-12-31
1994-09-13
Nilson, Robert G.
Valves and valve actuation
Electrically actuated valve
Having means to produce proportional flow
137529, 180142, B62D 506
Patent
active
053461754
ABSTRACT:
A control valve responsive to vehicle speed to vary hydraulic pressure in a vehicle variable assist power steering system. The control valve includes a proportional solenoid which responds to a control signal to vary the pressure difference between the valve inlet and outlet. The flow of hydraulic fluid through the valve generates a momentum force against a solenoid moveable valve element. This momentum force is balanced by an opposing bias spring force such that changes in inlet pressure occur simultaneously with changes in the control signal. The solenoid includes an adjustable air gap which allows calibration of the pressure difference across the valve to match a predetermined solenoid current.
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Kelsey-Hayes Company
Nilson Robert G.
LandOfFree
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