GF27.10-P-3031ACS Power Flow In Reverse Gear, Transmission Mode "C", Function

GF27.10-P-3031ACS Power flow in reverse gear, transmission mode "C", function
- Transmission 722.649









Function requirements for power flow in reverse gear in transmission mode "C", general
^ Circuit 87 ON
^ Engine running

Power flow in reverse gear, transmission mode "C", general
Torque from the torque converter is increased via the drive shaft (1) and the center planetary gear set and rear planetary gear set and transferred with reversed direction of rotation to the transmission output shaft (5).

The following multidisk brakes, overrunning clutches and multidisk clutches are not engaged:
- Multidisk brake B1 (21)
- Multidisk brake B2 (22)
- Overrunning clutch F1 (27)
- Overrunning clutch F2 (28)
- Multidisk clutch K2 (26)

In reverse gear with transmission mode "C", the power flows through the following gear sets:
^ Front planetary
^ Rear planetary gear set
^ Center planetary gear set

Front planetary
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 thereby locked and, due to the mechanical connection between the ring gear (29/4) and drive shaft (1), rotates at the transmission input speed (B) as a closed assembly.

Rear planetary gear set
The planet carrier is held securely at the transmission housing by the engaged multidisk brake B3 (23)31/3 The ring gear (31/4) rotates at the transmission input speed (B) due to the mechanical connection to the locked planetary gear set. The planet gears (31/2) turn between the ring gear (31/4) and the sun gear (31/1). Due to the held planet carrier (31/3) a direction reversal takes place so that the sun gear (31/1) turns in the opposite direction to the direction of engine rotation.

Center planetary gear set
The ring gear (30/4) is held securely at the transmission housing by the multidisk brake via the mechanical connection to the planet carrier (31/3) B3 (23). The sun gear (30/1) turns backwards due to the engaged multidisk clutch K3 (26). The planetary gears (30/2) roll on the fixed ring gear (30/4) and provide an increase in torque when power is transmitted from the sun gear (30/1) to the planet carrier (30/3). The transmission output shaft (5) connected to the planet carrier (30/3) rotates at reduced transmission input speed (B) opposite the direction of engine rotation.