Shape memory alloy rotary actuator with capacitive position feedback
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United States of America Patent
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-
Mar 17, 2009
Grant Date -
Oct 26, 2006
app pub date -
Feb 23, 2006
filing date -
Apr 26, 2005
priority date (Note) -
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Abstract
An engine mounted fan clutch is disclosed that utilizes an actuator including two shape memory alloy actuation wires to engage and disengage a valve arm and ultimately the fan. The actuator also includes a controller and a position sensor to accurately determine the position of a valve arm. The fan clutch is part of a control system that continuously monitors the engine parameters and makes adjustments to keep the engine temperature within an acceptable range.
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