Function Of Power Flow In Reverse Gear Function Of Program Selection "S" (Up To 4/23/04)
Principal Of Power Transmission In Reverse Gear
Program selection "S".
Torque from the torque converter is increased via the propeller shaft (1) and all three planetary gearsets and transferred with reversed direction of rotation to the output shaft (5). See Fig 1.
The following are not engaged:
- Rear Multi-Disc Brake (B2)
- Freewheel (F2)
- Front Multi-Disc Clutch (K1)
Front Planetary Gear Set
The input shaft (1) drives the internal gear (V4). In drive mode the sun gear (V1) is supported via the locked freewheel (F1) and in overrun mode in the housing via the engaged front multi-disc brake (B1). The planetary gears (V2) roll on the stationary internal gear (V1) and ensure a torque increase from the sun gear (V4) to the planet carrier (V3). The planet carrier (V3) moves at a reduced speed in the direction of engine rotation.
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 gear (H4) turns at a reduced speed because of its mechanical connection to the front 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 of 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 stainer internal gear (M4) and ensure 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.
- Torque Converter, Location/Task/Design/Function
See TORQUE CONVERTER, LOCATION/TASK/DESIGN/FUNCTION (UP TO 4/24/04) . - Planetary Gear Set, Location/Task/Design/Function
See PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION (UP TO 4/24/04) . - Multi-Disc Brake, Location/Task/Design/Function
See MULTIPLE-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION (UP TO 4/24/04) . - Multi-Plate Clutch, Location/Task/Design/Function
See MULTI-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION (UP TO 4/24/04) . - Freewheel, Location/Task/Design/Function
See LOCATION/TASK/DESIGN/FUNCTION OF FREEWHEEL (UP TO 4/24/04) .