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

GF27.10-P-3031ACL Power flow in reverse gear, transmission mode "C", function
- Transmission 722.618/646/694/696









Function requirements for power flow in reverse gear in transmission mode "C", general
^ Circuit 87 ON
^ Circuit 61 ON

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 (25)

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 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 planet carrier is held at the housing by the engaged multidisk brake B3 (23) (31/3). The ring gear (31/4) turns at transmission input speed because of its mechanical connection with the blocked planetary gear carrier. 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 via the mechanical connection to the planet carrier (31/3) of the multi-disk brake B3 (23) on the housing. The sun gear (30/1) turns backwards due to the engaged multidisk clutch K3 (26). The planetary gears (30/2) roll on the fixed sun gear (30/4) and take care of a torque increase when the power is transmitted from the ring gear (30/1) to the planet carrier (30/3). The transmission output shaft (5) connected to the planet carrier (30/3) turns at reduced speed opposite to the direction of engine rotation.