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

GF27.10-P-3017G 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"
Torque from the torque converter is increased via the propeller shaft (1) and all three planetary gear sets and transferred with reversed direction of rotation to the output shaft (5).

The following are not engaged:
^ Rear multi-disk brake (B2)
^ Overrunning clutch F2
^ Front multiple-disc clutch (K1)

Front planetary gear set
The input shaft (1) drives the ring gear (V4). 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 planetary gears (V2) roll on the blocked sun gear (V1) and ensure a torque increase from the ring gear (V4) to the planet carrier (V3). The planet carrier (V3) moves at reduced speed in the direction of engine rotation.

Rear planetary gear set
The planet carrier (H3) is held securely in the housing due to the engaged center multi-disk brake (B3). The ring gear (H4) turns at a reduced speed because of its mechanical connection to 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.

Center planetary gear set
The ring 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) rotates backwards due to the engaged rear multi-disk clutch (K3). The planetary gears (M2) roll on the stationary ring gear (M4) and ensure for a torque increase 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.