Power flow in 4th gear, function - GF27.10-P-3014G

TRANSMISSION 722.6

Fig 1: Identifying Power Flow In 4th Gear

Principle of power transmission in 4th gear:

The direct drive ratio of the 4th gear (i=1) means that there is no torque and speed conversion. Power is transferred from the propeller shaft (1) to the output shaft (5) via three locked planetary gearsets (5). The following are not engaged:

Front multi-disk brake (B1)

Rear multi-disk brake (B2)

Center multi-disk brake (B3)

Freewheel F1

Freewheel F2

Front planetary gear set

The planet carrier (V3) and sun gear (V1) are rigidly connected with 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 center multi-disk clutch (K2) is engaged and transmits the input speed of the input shaft (1) to the planet carrier (H3) via the hollow gear (M4). The ring gear (H4) turns in the same way as the planet carrier (H3) due to the mechanical connection with the locked front planetary gearset. This planetary gearset is therefore locked and turns as a closed unit.

Center planetary gear set

The hollow gear (M4) rotates at input speed due to the engaged center multi-disk clutch (K2). The rear multi-disk clutch (K3) connects the sun gears of the center planetary gear set (M1) and the rear planetary gear set (H1). The planetary gearset is locked by the same speeds of the ring gear (M4) and the sun gear (M1) and it turns as a closed unit.

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