GF27.10-P-3013ACK Power Flow In 3rd Gear, Function
GF27.10-P-3013ACK Power Flow in 3rd Gear, Function
- TRANSMISSION 722.695 in MODEL 171.4 as of Model Year 09 /Modification Year 08 model refinement package
Sectional view of automatic transmission
1 Input shaft
2 Turbine wheel
3 Stator
4 Impeller
5 Transmission output shaft
16 Torque converter lockup clutch
21 Multidisk brake B1
22 Multidisk brake B2
23 Multidisk brake B3
24 Multidisk clutch K1
25 Multidisk clutch K2
26 Multidisk clutch K3
27 Overrunning clutch F1
28 Overrunning clutch F2
29/1 Sun gear
29/2 Planetary gears
29/3 Planet carrier
29/4 Ring gear
30/1 Sun gear
30/2 Planetary gears
30/3 Planet carrier
30/4 Ring gear
31/1 Sun gear
31/2 Planetary gears
31/3 Planet carrier
31/4 Ring gear
Shown here, power flow
1 Input shaft
2 Turbine wheel
3 Stator
4 Impeller
5 Transmission output shaft
16 Torque converter lockup clutch
21 Multidisk brake B1
22 Multidisk brake B2
23 Multidisk brake B3
24 Multidisk clutch K1
25 Multidisk clutch K2
26 Multidisk clutch K3
27 Overrunning clutch F1
28 Overrunning clutch F2
29/1 Sun gear
29/2 Planetary gears
29/3 Planet carrier
29/4 Ring gear
30/1 Sun gear
30/2 Planetary gears
30/3 Planet carrier
30/4 Ring gear
31/1 Sun gear
31/2 Planetary gears
31/3 Planet carrier
31/4 Ring gear
A Engine speed
B Transmission input speed
C 1st gear ratio
D Stationary parts
Function requirements for power flow in 3rd gear, general
^ Circuit 87 ON
^ Engine running
Power flow in 3rd gear, general
The drive shaft (1) uses the center planetary gear set to increase the torque developed by the torque converter and transmit it to the transmission output shaft (5).
The following multidisk brakes, overrunning clutches and multidisk clutches are not engaged:
- Multidisk brake B1 (21)
- Multidisk brake B3 (23)
- Overrunning clutch F1 (27)
- Overrunning clutch F2 (28)
- Multidisk clutch K3 (26)
In 3rd 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 sun gear (29/1) are rigidly connected to each other via the engaged multidisk clutch K1 (24). The planetary gear set is therefore blocked and turns as a closed unit at the transmission input speed due to the mechanical connection of the ring gear (29/4) and propeller shaft (1).
Rear planetary gear set
The multidisk clutch K2 (25) is engaged and transmits the transmission input speed 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 due to the engaged multidisk clutch K2 (25). The sun gear (30/1) is supported at the housing via the multidisk brake B2 (22). The planetary gears (30/2) roll on the fixed sun gear (30/1) and take care of a torque increase when power is transmitted from the ring gear (30/4) to the planet carrier (30/3). The transmission output shaft (5) connected to the planet carrier (30/3) turns at a reduced speed in the direction of rotation of the engine.
