Planetary Gear Trains
The eight forward gears and the reverse gear are produced by a combination of four simple planetary gear sets, three clutches and two brakes. The front two gear sets share a common sun gear. Power is output always through the planetary carrier of the fourth gearset.
Five shift elements comprising three clutches and two brakes, are responsible for all eight forward and reverse gears. High efficiency is achieved by the use of only two shift elements disengaged in each gear which reduces drag and so increases the efficiency.
Planetary Gear Sets 1, 2 and 3
The planetary gear sets 1 and 2 comprise:
- Sunwheel - shared by both gear sets
- Three or four planetary gears per gear set
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NOTE: Ingenium I4 2.0L Diesel engine fitment has three planetary gears in gearset 2, all other engine variants have four planetary gears.
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- Planetary gear carrier (spider) per gear set
- Ring gear per gear set.
The planetary gear set 3 comprises:
- Sunwheel
- Three planetary gears
- Planetary gear carrier (spider)
- Ring gear.
| ITEM | DESCRIPTION |
|---|---|
| 1 | Planetary gears - gear set 1 |
| 2 | Ring gear - gear set 1 |
| 3 | Planetary gear carrier (spider) |
| 4 | Planetary gears - gear set 2 |
| 5 | Ring gear - gear set 2 |
| 6 | Planetary gears - gear set 3 |
| 7 | Ring gear - gear set 3 |
| 8 | Sun wheel - gear set 3 |
| 9 | Sun wheel - joint gear sets 1 and 2 |
Planetary Gear Set 4
The planetary gear set 4 comprises:
- Sunwheel
- Four planetary gears
- Planetary gear carrier (spider) - output shaft
- Ring gear.
| ITEM | DESCRIPTION |
|---|---|
| 1 | Ring gear |
| 2 | Planetary gears |
| 3 | Output shaft/gear carrier |
| 4 | Sun wheel |