GF27.10-P-3019GH Power Flow In Reverse, Function

GF27.10-P-3019GH Power flow in reverse, function
- TRANSMISSION 722.6

Component Identification:

Principle of power transmission in reverse gear
Torque from the torque converter is increased via the propeller shaft (1) and all three planetary gearsets and transferred with reversed direction of rotation to the output shaft (5).

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

Rear planetary gear set
The planet carrier (H3) is held securely in the housing due to the engaged center multi-disk brake (B3). The internal 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.

Front planetary gear set
The input shaft (1) drives the internal 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 planet gears (V2) roll over the fixed sun gear (V1) and provide an increase in torque between the internal gear (V4) and the planet carrier (V3). The planet carrier (V3) moves at reduced speed in the direction of engine rotation.

Center planetary gear set
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) rotates backwards due to the engaged rear multi-disk clutch (K3). The planet gears (M2) roll over the fixed internal gear (M4) and provide an increase in torque between the sun gear (M1) and 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.