Flow controlling apparatus for power steering
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United States of America Patent
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Oct 24, 2006
Grant Date -
Jan 6, 2005
app pub date -
Jun 22, 2004
filing date -
Jun 23, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A flow controlling apparatus for a power steering system includes a variable throttle mechanism installed in the pump to change the flow rate of discharged oil from the pump to a hydraulic device; a linear solenoid mechanism controlling the variable throttle mechanism by a predetermined energizing current; a spool feeding back the excess discharged oil to a bypass passage of the pump in accordance with a differential pressure between the upstream and downstream sides of the variable throttle mechanism when the excess fluid exceeds a predetermined value; and an ECU controlling the energized current to change the transition process in accordance with a steering angular velocity of the steering wheel.
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