GF27.10-P-3014ACS Power Flow In 4th Gear, Function

GF27.10-P-3014ACS Power flow in 4th gear, function
- Transmission 722.649









Function requirements for power flow in 4th gear, general
^ Circuit 87 ON
^ Engine running

Power flow in 4th gear, general
The direct gear ratio of 4th gear (i = 1) means that no torque or speed conversion takes place. Power is transmitted from the input shaft (1) via the 3 blocked planetary gear sets to the transmission output shaft (5).

The following multi-disk brakes and overrunning clutches are not engaged:
- Multidisk brake B1 (21)
- Multidisk brake B2 (22)
- Multidisk brake B3 (23)
- Overrunning clutch F1 (27)
- Overrunning clutch F2 (28)

In 4th gear, the power flows through the following gear sets:
^ Front planetary
^ Rear planetary gear set
^ Center planetary gear set

Front planetary gear set
The planet carrier (29/3) and the sun gear (29/1) are connected rigidly to each other via the engaged multidisk clutch K1 (24). The planetary gear set is thereby locked and, due to the mechanical connection between the ring gear (29/4) and drive shaft (1), rotates at the transmission input speed (B) as a closed assembly.

Rear planetary gear set
The multidisk clutch K2 (25) is engaged and transmits the transmission input speed (B) of the drive shaft (1) to the planet carrier (31/3) via the ring gear (31/4). Via the mechanical connection to the blocked front planetary gear set the ring gear (31/4) turns at the same rotational speed as the planet carrier (31/3). The planetary gear set is thus blocked and turns as a closed unit.

Center planetary gear set
The ring gear (30/4) turns at the transmission input speed (B) due to the engaged multidisk clutch K2 (25). The multidisk clutch K3 (26) connects the sun gears of the center planetary gear set and rear planetary gear set. Due to the equality of speeds of the ring gear (30/4) and sun gear (30/1) the planetary gear set is locked and turns as a closed unit.