Power closure assembly

1. A powered trunk closure assembly for a vehicle comprising:

at least one body panel defining an opening of a trunk, the at least one body panel including a water trough formed thereon;

a closure member positioned about the opening and moveable between open and closed positions relative to the opening;

a linkage assembly having a four bar linkage attached at one end to the body panel and at another end to the closure member;

a motor disposed within the water trough and linked with a gear train, the gear train attached to a pivot of the linkage assembly exterior of the trunk for actuating the linkage assembly, the gear train disposed within the water trough formed in the body panel.

2. The powered trunk closure assembly of claim 1 wherein the gear train is a planetary gear train.

3. The powered trunk closure assembly of claim 1 wherein the gear train has an output gear ratio of at least 750 to 1.

4. The powered trunk closure assembly of claim 2 including a worm drive coupled to the motor.

5. The powered trunk closure assembly of claim 4 wherein the planetary gear train includes at least one reduction stage.

6. The powered trunk closure assembly of claim 5 including first and second reduction stages.

7. The powered trunk closure assembly of claim 6 wherein the first reduction stage includes a worm gear meshed with the worm drive shaft, the worm pear including a sun gear, a first carrier plate and a first set of planetary gears meshed with the sun gear, and a first carrier plate pinion gear supported by the first carrier plate.

8. The powered trunk closure assembly of claim 7 wherein the second reduction stage includes a second carrier plate, a second set of planetary gears meshed with the first carrier plate pinion gear and supported on the second carrier plate and a second carrier plate pinion gear supported by the second carrier plate.

9. The powered trunk closure assembly of claim 7 including a clutch interposed between the sun gear and the worm drive.

10. The powered trunk closure assembly of claim 9 wherein the clutch is a bi-directional clutch.

11. The powered trunk closure assembly of claim 7 including a coupler attached to the second carrier plate pinion gear, the coupler attached to the pivot.

12. The powered trunk closure assembly of claim 11 wherein the coupler includes a keyed shape adapted to slip fit into a corresponding shape formed on the pivot.

13. The powered trunk closure assembly of claim 11 wherein the coupler includes a collar formed about a center of the coupler, the collar positioning the coupler axially with respect to the pivot.

14. The powered trunk closure assembly of claim 1 including a housing disposed about the gear train and a cover attached to the housing.

15. The powered trunk closure assembly of claim 1 wherein the motor is positioned parallel with respect to the linkage assembly.