Abstract: A heat engine includes a first rotatable pulley and a second rotatable pulley spaced from the first rotatable pulley. A shape memory alloy (SMA) element is disposed about respective portions of the pulleys at an SMA pulley ratio. The SMA element includes first spring coil and a first fiber core within the first spring coil. A timing cable is disposed about disposed about respective portions of the pulleys at a timing pulley ratio, which is different than the SMA pulley ratio. The SMA element converts a thermal energy gradient between the hot region and the cold region into mechanical energy.

Abstract: A vehicle includes a fluid mixing system. The fluid mixing system includes a fluid and a heat engine. The fluid has a first fluid region at a first temperature and a second fluid region at a second temperature that is different from the first temperature. The heat engine includes a shape-memory alloy disposed in heat exchange contact with each of the first fluid region and the second fluid region. The heat engine is operable to mix the fluid between the first fluid region and the second fluid region in response to a change in the crystallographic phase of the shape-memory alloy to reduce the difference in the composition of the fluid bath between the first fluid region and the second fluid region.

Abstract: A heat transport system includes a fluid, a heat engine, and a component. The fluid has a first fluid region at a first temperature and a second fluid region at a second temperature that is different from the first temperature. The heat engine includes a shape-memory alloy disposed in contact with each of the first fluid region and the second fluid region. The heat engine is operable to transfer heat from one of the first fluid region and the second fluid region to the other of the first fluid region and the second fluid region in response to the crystallographic phase of the shape-memory alloy.

Abstract: A latch assembly includes a latch movable between released and restrained positions and a latch spring biasing toward the released position. A first lever is movable between open and closed positions, corresponding to the released and restrained positions, respectively. A first lever spring biases toward the closed position. A second lever is movable between unlocked and locked positions, corresponding to the first lever open and closed positions, respectively. A second lever spring biases toward the locked position. An active material based actuator selectively moves the second lever from the locked to unlocked position in response to an activation signal. A primary activation mechanism selectively produces the activation signal without a mechanical connection to the passenger compartment. An auxiliary activation mechanism does not rely on the vehicle power system. A key or portable energy storage device may cause the activation signal from the primary or auxiliary activation mechanism.

Abstract: A power plant configured for converting thermal energy to electricity includes a source of thermal energy provided by a temperature difference between a primary fluid having a first temperature and a secondary fluid having a second temperature that is different from the first temperature. The plant also includes a collector configured for enhancing the temperature difference between the primary and secondary fluids, and a heat engine configured for converting at least some thermal energy to mechanical energy. The heat engine includes a pseudoplastically pre-strained shape-memory alloy disposed in heat exchange relationship with each of the primary and secondary fluids. Further, the plant includes a generator driven by the heat engine and configured for converting mechanical energy to electricity.

Abstract: An active air dam adapted for use with a vehicle, includes a deflector pivotally translatable relative to the vehicle, so as to be caused to achieve stowed and deployed conditions, wherein the deflector, when in the deployed condition, is configured to occlude air flow beneath the vehicle, and further includes an active material actuator comprising an active material drivenly coupled to the deflector, and configured to cause the deflector to pivot to one of the stowed and deployed conditions as a result of activating the material, and the vehicle is preferably configured to cause the actuator to pivot the deflector when a pre-determined vehicle or external condition is detected.