Magnetostrictive electronic valve timing actuator
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United States of America Patent
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Mar 9, 2004
Grant Date -
Jul 24, 2003
app pub date -
Dec 20, 2002
filing date -
Feb 22, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for actuating a valve using magnetostrictive transduction is provided. A ferro-magnetic rod having giant magnetostrictive properties is operatively coupled with a hydraulic chamber. Application of a magnetic field to the ferro-magnetic rod generates strain in the rod and corresponding movement in a first piston, causing the fluid in the hydraulic chamber to become pressurized. The pressurized fluid forces a second piston to move, thereby actuating the valve.
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