Power flow in 2nd gear, function - GF27.10-P-3012G

TRANSMISSION 722.6

Fig 1: Identifying Power Flow In 2nd Gear

Principle of power transmission in 2nd gear:

Torque from the torque converter is increased via the propeller shaft (1) and the center and rear planetary gearset and transferred to the output shaft (5).

The following are not engaged:

Front multi-disk brake (B1)

Center multi-disk brake (B3)

Freewheel F1

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 internal gear (H4) turns at the input speed because of its mechanical connection to the front planet carrier (V3). The sun gear (H1) is supported via the engaged rear multi-disk brake (B2) and in drive mode via the locked freewheel (F2), in overrun mode via the engaged rear multi-disk clutch (K3) in the housing. The planet gears (H2) roll over the fixed sun gear (H1) and provide an increase in torque between the internal gear (H4) and the planet carrier (H3). The planet carrier (H3) moves at a reduced speed in the direction of engine rotation.

Center planetary gear set

The ring gear (M4) is driven at the same speed as the rear planet carrier (H3) as a result of a mechanical connection. The sun gear (M1) is supported in the housing via the rear multi-disk brake (B2). The planet gears (M2) roll over the fixed sun gear (M1) and provide an increase in torque between the internal gear (M4) and the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in 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
	Multiple-disc brake, location / task / design / function		GF27.51-P-5100G
	Multi-plate clutch, location / task / design / function		GF27.51-P-5101G
	Location / task / design / function of freewheel		GF27.51-P-5102G