Motor-vehicle door provided with a device for moving the window pane when the door is opened and closed
A door for a motor vehicle of the type without frame for the side window is provided with a device for controlling a slight movement of the window from and into its completely raised position upon opening and closing of the door. Said device comprises shape-memory actuating means.
1. A door of a motor vehicle, comprising:
a supporting structure, a window vertically mobile with respect to the supporting structure;
an electric-actuation transmission for controlling movement of the window; and
means for causing a displacement of the window between a completely raised position and a partially lowered position when the door is opened or closed respectively,
wherein said means for causing displacement of the window comprise:
a coupling between the window and a driven member controlled by said transmission, which enables a movement of the window with respect to said driven member;
shape-memory actuating means for controlling the movement of the window with respect to said driven member said shape-memory actuating means being activated by an electrical current passing therethrough; and
an electronic control unit which detects the open or closed state of the door and the position of the window and actuates actuate said shape-memory actuating means to bring about displacement of the window between the window's completely raised position and partially lowered position when the door is opened or closed, respectively.
2. The door according to claim 1 , wherein said shape-memory actuating means comprise a shape-memory wire and means for causing the shape-memory wire to be traversed by said electrical current.
3. The door according to claim 2 , wherein said shape-memory means further comprise a return spring for recalling the shape-memory wire towards its inoperative position.
4. The door according to claim 2 , wherein said shape-memory actuating means comprise at least one actuation member displaceable between a first operative position corresponding to the completely raised position of the window and a second operative position corresponding to said partially lowered position of the window.
5. The door according to claim 4 , wherein activation of the shape-memory actuating means causes lowering of the window, the movement of raising the window being controlled by elastic return means when the shape-memory actuating means are de-activated.
6. The door according to claim 4 , wherein the shape-memory actuating means comprise a bistable actuating means.