GF27.10-P-3017SK Function of Power Flow In Reverse Gear Function of Program Selection "S"

GF27.10-P-3017SK Function of power flow in reverse gear Function of program selection "S"
- Transmission 722.6









Principle of power flow in reverse gear:

Program selection "S"
Via the drive shaft (1) and involving all 3 planetary gearsets the torque coming from the torque converter is increased and transmitted with reversed direction of rotation to the output shaft (5).

The following components are not engaged:
^ Rear multi-disk brake (B2)
^ Freewheel (F2)
^ Front multi-disk clutch (K1)

Rear planetary gearset
The engaged center multi-disk brake (B3) holds the planet carrier (B3) against the housing. The ring gear (H4) turns at a reduced speed due to the mechanical connection with the front planet carrier (V3). The planet gears (H2) turn between the ring gear (H4) and the sun gear (H1). The direction is reversed due to the securely held planet carrier (H3) so that the sun gear (H1) rotates in the opposite direction to the engine.

Front planetary gearset
The ring gear (V4) is driven by the propeller shaft (1). In drive mode the sun gear (V1) is supported via the locked freewheel (F1) and in overrun mode in the housing via the engaged front multi-disk brake (B1). The planet gears (V2) turn on the fixed sun gear (V1) and increase the torque from the ring gear (V4) to the planet carrier (V3). The planet carrier (V3) moves at reduced speed in the direction of engine rotation.

Center planetary gearset
The hollow gear (M4) is held securely in the housing by the center multi-disk brake (B3) via the mechanical connection to the planet carrier (H3). The sun gear (M1) turns backwards due to the engaged rear multi-disk clutch K3. The planet gears (M2) turn on the fixed ring gear (M4) and increase the torque from the sun gear (M1) to the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in the opposite direction to the running direction of the engine.