Nitinol Shape memory wire is used as actuator in automobile applications.
It changes to its preset shape when heated to its transformation temperature.
This property helps to generate minute motions without motors. One of the applications that are in production is the remote foglamp louvre opening device. A shape memory spring is wired in series with the lamp. Turning on the fog-lamp passes the lamp current through the actuator, which heats up, contracts and opens the louvre.
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