Electrical variable orifice actuator
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United States of America Patent
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Nov 16, 1993
Grant Date -
N/A
app pub date -
Jul 7, 1992
filing date -
Jul 7, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A solenoid-operated control valve for a variable assist power steering system of an automobile vehicle includes a valve structure which defines a variable flow orifice in response to a predetermined variable (e.g., vehicle velocity) thereby providing fluid pressure needed to modify user input torque supplied to the steering wheel. The valve structure features a unique nonmagnetic core tube which reduces manufacture costs, enhances the ease of assembly of the magnetic housing elements needed to complete a magnetic circuit, and ensures the armature responds as needed to control orifice closure.
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