GF27.10-D-3011H Power Flow In 1st Gear, Function

GF27.10-D-3011H Power Flow in 1st Gear, Function
- TRANSMISSION 722.6









1 Input shaft
2 Turbine wheel
3 Stator
4 Impeller
5 Output shaft
16 Torque converter lockup clutch
21 Multidisk brake B1
22 Multidisk brake B2
23 Multidisk brake B3
24 Multidisk clutch K1
25 Multidisk clutch K2
26 Multidisk clutch K3
27 Overrunning clutch F1
28 Overrunning clutch F2
29/1 Sun gear 31/4 Ring gear
29/2 Planetary gears
29/3 Planet carrier
29/4 Ring gear
30/1 Sun gear
30/2 Planetary gears
30/3 Planet carrier
30/4 Ring gear
31/1 Sun gear
31/2 Planetary gears
31/3 Planet carrier

A Engine speed
B Transmission input rpm
C 1st gear ratio
D 2nd gear ratio
E 3rd gear ratio
F Stationary parts

Principle of power flow in 1st gear:

Via the input shaft (1) and involving all 3 planetary gear sets the torque going out from the torque converter increases and is transmitted to the output shaft (5).

The following are not engaged:
^ Multidisk clutch K1 (24)
^ Multidisk clutch K2 (25)
^ Multidisk brake B3 (23)

Front planetary gear set

The input shaft (1) drives the ring gear (29/4). In drive mode, the sun gear (29/1) is supported at the housing via the locked overrunning clutch F1 (27) and, in overrun mode, via the engaged multidisk brake B1 (21). The planetary gears (29/2) roll on the fixed sun gear (29/1) and take care of a torque increase when the power is transmitted from the ring gear (29/4) to the planet carrier (29/3). The planet carrier (29/3) moves at reduced speed in the direction of engine rotation.

Rear planetary gear set

The ring gear (31/4) rotates at reduced speed due to the mechanical connection to the planet carrier (29/3). The sun gear (31/1) is supported at the housing via the engaged multidisk brake B2 (22) and, in drive mode, via the locked overrunning clutch F2 (28) and, in overrun mode, via the engaged multidisk clutch K3 (26). The planetary gears (31/2) roll on the fixed sun gear (31/1) and take care of a torque increase when the power is transmitted from the ring gear (31/4) to the planet carrier (31/3). The planet carrier (31/3) moves at reduced speed in the direction of engine rotation.

Center planetary gear set

Due to a mechanical connection, the ring gear (30/4) is driven at the same speed as the planet carrier (31/3). The sun gear (30/1) is supported at the housing via the multidisk brake B2 (22).

The planetary gears (30/2) roll on the fixed sun gear (30/1) and take care of a torque increase when power is transmitted from the ring gear (30/4) to the planet carrier (30/3). The output shaft (5) connected to the planet carrier (30/3) turns at a reduced speed in the direction of engine rotation.