GF27.10-P-3013ACM Power Flow In 3rd Gear, Function

GF27.10-P-3013ACM Power flow in 3rd gear, function
- TRANSMISSION 722.643/649
- refinement package
- as of model year 09









Function requirements for power flow in 3rd gear, general
^ Circuit 87 ON
^ Engine running

Power flow in 3rd gear, general
The torque developed by the torque converter is increased and transmitted to the transmission output shaft (5) through the input shaft (1) involving the center planetary gear set.

The following multi-disk brakes, overrunning clutches and multi-disk clutches are not engaged:

- Multidisk brake B1 (21)
- Multidisk brake B3 (23)
- Overrunning clutch F1 (27)
- Overrunning clutch F2 (28)
- Multidisk clutch K3 (26)

In 3rd gear, the power flows through the following gear sets:

^ Front planetary
^ Rear planetary gear set
^ Center planetary gear set

Front planetary gear set
The planet carrier (29/3) and sun gear (29/1) are rigidly connected to each other via the engaged multidisk clutch K1 (24). The planetary gear set is therefore blocked and turns as a closed unit at the transmission input speed due to the mechanical connection of the ring gear (29/4) and propeller shaft (1).

Rear planetary gear set
The multidisk clutch K2 (25) is engaged and transmits the transmission input speed of the drive shaft (1) to the planet carrier (31/3) via the ring gear (31/4). Via the mechanical connection to the blocked front planetary gear set the ring gear (31/4) turns at the same rotational speed as the planet carrier (31/3). The planetary gear set is thus blocked and turns as a closed unit.

Center planetary gear set
The ring gear (30/4) rotates at transmission input speed through the engaged multidisk clutch K2 (25). 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 transmission output shaft (5) connected to the planet carrier (30/3) turns at a reduced speed in the direction of rotation of the engine.