GF27.10-P-3025G Power Flow In Reverse Gear, Program Selection "C", Function
GF27.10-P-3025G Power flow in reverse gear, program selection "C", function
- Transmission 722.6 [model 203/209.3 as of 1.6.03, model 230/211 as of 1.9.03 model 215 as of 1.9.02]
Principle of power transmission in reverse gear
Program selection "C"
Torque from the torque converter is increased via the drive shaft (1) and the center planetary gear set and rear planetary gear set and transferred with reversed direction of rotation to the output shaft (5).
The following are not engaged:
^ Front multi-disk brake (B1)
^ Rear multi-disk brake (B2)
^ Freewheel (F1)
^ Freewheel (F2)
^ Center multi-disk clutch (K2)
Front planetary gear set
The planet carrier (V3) and sun gear (V1) are rigidly connected to each other via the engaged front multi-disk clutch (K1). 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 (V4) and propeller shaft.
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 geared wheel (H4) turns at the input speed because of its mechanical connection with the locked 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 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 planetary gears (M2) roll on the stationary internal 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.
