GF27.10-P-3014AHW Power Flow In 4th Gear, Function

GF27.10-P-3014AHW Power Flow in 4th Gear, Function
TRANSMISSION 722.9 (except 722.930) in MODEL 204.0 as of model year 2009 /YoM 08
TRANSMISSION 722.9 (except 722.930) in MODEL 204.2 as of model year 2009 /YoM 08
TRANSMISSION 722.9 (except 722.930) in MODEL 204.3
TRANSMISSION 722.9 in MODEL 204.9





2 Turbine wheel
3 Stator
4 Impeller
5 Small ring gear
6 Dual planet carrier
7 Sun gear
8 Large ring gear
9 Ring gear
10 Planet carrier
11 Sun gear
12 Ring gear
13 Planet carrier
14 Sun gear
16 Torque converter lockup clutch
41 Multidisk brake BR
42 Multidisk brake B1
43 Multidisk brake B2
45 Multidisk brake B3
46 Multidisk clutch K1
47 Multidisk clutch K2
48 Multidisk clutch K3
49 Short planetary gears
50 Long planetary gears
51 Planetary gears
52 Planetary gears

A Input
B Output

Function requirements for power flow in 4th gear, general
^ Circuit 87 (connected circuit 15) ON
^ Engine running

Power flow in 4th gear, general
The following multidisk brakes and multidisk clutches are engaged:
- Multidisk brake B2 (43)
- Multidisk clutch K1 (46)
- Multidisk clutch K2 (47)

In 4th gear, the power flows through the following gear sets:
^ Ravigneaux gear set
^ Rear single planetary gear set
^ Front single planetary gear set

Ravigneaux gear set
Due to the engaged multidisk clutch K1 (46) the components of the Ravigneaux gear set are locked together and pass on the transmission input torque and transmission input speed unchanged to the ring gear (9).

Rear single planetary gear set
The engaged multidisk clutch K2 (47) means that the rpm of the ring gears (9, 12) are the same. As a result the rear single planetary gear set is locked and not actively involved in the gear ratio.

Front single planetary gear set
Due to the engaged multidisk clutch K2 (47) the ring gear (12) is driven at transmission input speed. The planetary gears (52) roll on the stalled sun gear (14) and transfer the increased torque and reduced rotational speed to the transmission output shaft via the planet carrier (13). The transmission output shaft thus rotates with reduced transmission input speed in the direction of rotation of the engine.