GF27.10-P-3030ACL Power Flow In Reverse Gear, Transmission Mode "S", Function

GF27.10-P-3030ACL Power flow in reverse gear, transmission mode "S", function
- Transmission 722.618/646/694/696









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

Power flow in reverse gear, transmission mode "S", general
Torque from the torque converter is increased via the drive shaft (1) and all 3 planetary gear sets 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 B2 (22)
- Overrunning clutch F2 (28)
- Multidisk clutch K1 (24)

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

Front planetary
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 planet carrier is held at the housing by the engaged multidisk brake B3 (23) (31/3). The ring gear (31/4) rotates at reduced speed due to the mechanical connection to the planet carrier (29/3). 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.