| 摘要 |
A purge valve is provided for a vehicle. The purge valve 10 includes a body 12 to be coupled to an intake manifold 40 of the vehicle and to a canister 33 . The body has an orifice 20 for communicating vapor from the canister 33 with airflow in the intake manifold 40 . A valve 18 is movable between a first position closing the orifice 20 and a second position opening the orifice. A shape memory alloy (SMA) structure 31 is associated with the valve such that when electric current is provided to the SMA structure 31 to heat the SMA structure above a transformation temperature thereof, the SMA structure transforms from an original shape to a second shape, thereby causing the valve 18 to move from the first position to the second position, and when the current is removed from the SMA structure, the SMA structure returns to the original shape, thereby permitting the valve 18 to return to the first position.
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