Power flow in 1st gear, function - GF27.10-P-3011G

TRANSMISSION 722.6

Fig 1: Identifying Power Flow In 1st Gear

Principle of power transmission in 1st gear:

The torque coming from the torque converter is increased and transmitted to the output shaft (5) via the input shaft (1), involving all three planetary gear sets.

The following are not engaged:

Front multi-disk clutch (K1)

Center multi-disc clutch (K2)

Center multi-disk brake (B3)

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 via the engaged front multi-disk brake (B1) in the housing (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.

Rear planetary gear set

The internal gear (H4) turns at a reduced speed because of its mechanical connection to the front planet carrier (H3). 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) (M1). 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