GF27.10-D-3019H Power Flow In Reverse, Function

GF27.10-D-3019H Power Flow in Reverse, Function
- TRANSMISSION 722.6









1 Input shaft
2 Turbine wheel
3 Stator
4 Impeller
5 Output shaft
16 Torque converter lockup clutch
21 Multidisk brake B1
22 Multidisk brake B2
23 Multidisk brake B3
24 Multidisk clutch K1
25 Multidisk clutch K2
26 Multidisk clutch K3
27 Overrunning clutch F1
28 Overrunning clutch F2
29/1 Sun gear
29/2 Planetary gears
29/3 Planet carrier
29/4 Ring gear
30/1 Sun gear
30/2 Planetary gears
30/3 Planet carrier
30/4 Ring gear
31/1 Sun gear
31/2 Planetary gears
31/3 Planet carrier
31/4 Ring gear

A Engine speed
B Transmission input rpm
C 1st gear ratio
D 2nd gear ratio
E Stationary parts

Principle of power flow in reverse gear

Via the input shaft (1) and involving the center planetary gear set and the rear planetary gear set the torque going out from the torque converter is increased and transmitted to the output shaft (5) with a reversed direction of rotation.

The following are not engaged:
^ Multidisk brake B1 (21)
^ Multidisk brake B2 (22)
^ Overrunning clutch F1 (27)
^ Overrunning clutch F2 (28)
^ Multidisk clutch K2 (26)

Front planetary

The planet carrier (29/3) and the sun gear (29/1) are connected rigidly 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 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 internal geared wheel (31/4) turns at the input speed because of its mechanical connection with the blocked planet 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 securely at the housing by the multidisk brake B3 (23) via the mechanical connection to the planet carrier (31/3). 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 output shaft (5) connected to the planet carrier (30/3) turns at reduced speed opposite to the direction of engine rotation.