Power flow in reverse gear, program selection" C", function - GF27.10-P-3025G

TRANSMISSION 722.6 in model 203, 209.3 as of 1.6.03, 209.4, 211 as of 1.9.03, 215 as of 1.9.02, 219, 220 as of 1.9.02, 230 as of 1.9.03, 240

Fig 1: Power Flow In Reverse Gear, Program Selection "C", Function Diagram - Transmission 722.6 (1 Of 2)

Fig 2: Power Flow In Reverse Gear, Program Selection "C", Function Diagram - Transmission 722.6 (2 Of 2)

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 gearset and rear planetary gearset 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 gearset 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.

	Torque converter, location/task/design/function		GF27.20-P-5100G
	Planetary gear set, location/task/design/ function		GF27.50-P-5100G
	Multi-disk brake, location/task/design/function		GF27.51-P-5100G
	Multi-disk clutch, location/task/design/function		GF27.51-P-5101G
	Overrunning clutch, location/task/design/ function		GF27.51-P-5102G