GF27.10-P-3015ACK Power Flow In 5th Gear, Function
GF27.10-P-3015ACK Power Flow in 5th 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 2nd gear ratio
E 3rd gear ratio
F Stationary parts
Function requirements for power flow in 5th gear, general
^ Circuit 87 ON
^ Engine running
Power flow in 5th gear, general
The drive shaft (1) makes use of all 3 planetary gear sets 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 B2 (22)
- Multidisk brake B3 (23)
- Overrunning clutch F2 (28)
- Multidisk clutch K1 (24)
In 5th gear, the power flows through the following gear sets:
^ Front planetary
^ Rear planetary gear set
^ Center planetary gear set
Front planetary
The input shaft (1) drives the ring gear (29/4). In drive mode, the sun gear (29/1) is supported at the housing via the locked overrunning clutch F1 (27) and, in overrun mode, via the engaged multidisk brake B1 (21). The planet gears (29/2) revolve around the fixed sun gears (29/1) and provide an increase in torque between the ring gear (29/4) and the planet carrier (29/3). The planet carrier (29/3) moves at reduced speed in the direction of engine rotation.
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). The ring gear (31/4) rotates at reduced speed due to the mechanical connection to the planet carrier (29/3). The planet gears (31/2) turn between the ring gear (31/4) and the sun gear (31/1). The sun gear (31/1) moves at an increased speed in the running direction of the engine.
Center planetary gear set
The ring gear (30/4) turns at the transmission input speed due to the engaged multidisk clutch K2 (25). Due to the connection to the sun gear the multi-disk clutch K3 (26) transmits (31/1) an increased rotational speed to the sun gear (30/1). The planet gears (30/2) turn between the ring gear (30/4) and the sun gear (30/1). The speed of the planet carrier (30/3) and transmission output shaft (5) connected to it is between the ring gear (30/4) and sun gear (30/1). This provides a step-up ratio.
