Power Flow In Reverse Gear, Program Selection "C", Function

Principle Of Power Transmission In Reverse Gear 

Program selection "C"

Torque from torque converter is increased via the drive shaft (1) and the center planetary gearset and transferred with reversed direction of rotation to the output shaft (5). See Figure.

The following are not engaged:

• Front multi-disc brake (B1)
• Rear Multi-Disc Brake (B2)
• Freewheel (F1)
• Freewheel (F2)
• Center multi-disc clutch (K2)

Front Planetary Gear Set 

The planet carrier (V3) and sun gear (V1) are rigidly connected to each other via the engaged front multi-disc 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 planet carrier (H3) is held securely in the housing due to the engaged center multi-disc brake (B3). The internal geared wheel (H4) turns at the input speed because of its mechanical connection with the locked planet carrier (V3). The planet gears (H2) turn between the ring gear (H4) and the sun gear (H1). The direction is reversed due to the securely held planet carrier (H3) so that the sun gear (H1) rotates in the opposite direction to the engine.

Center Planetary Gear Set 

The hollow gear (M4) is held securely in the housing by the center multi-disc brake (B3) via the mechanical connection to the planet carrier (H3). The sun gear (M1) rotates backwards due to the engaged rear multi-disc clutch (K3). The planetary gears (M2) roll on the stationary internal gear (M4) and ensure for a torque increase from the sun gear (M1) to the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in the opposite direction to the running direction of the engine.

1. Torque Converter, Location/Task/Design/Function
   
   See TORQUE CONVERTER, LOCATION/TASK/DESIGN/FUNCTION .
2. Planetary Gear Set, Location/Task/Design/Function
   
   See PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION .
3. Multi-Disc Brake, Location/Task/Design/Function
   
   See MULTIPLE-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION .
4. Multi-Disc Clutch, Location/Task/Design/Function
   
   See MULTI-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION .
5. Overrunning Clutch, Location/Task/Design/Function
   
   See LOCATION/TASK/DESIGN/FUNCTION OF FREEWHEEL .