Power Flow In 1ST Gear

Component Illustration:

Principle Of Power Transmission In 1st Gear:
Torque from the torque converter is increased via the propeller shaft (1) and all three planetary gearsets and transferred to the output shaft (5).

Front Planetary Gearset:
The ring gear (V4) is driven by the propeller shaft (1). The sun gear (VI) is held against the housing by the locked freewheel F1 during acceleration and via the engaged multiple-disc brake B1 during deceleration. The planet gears (V2) turn on the fixed sun gear (V1) and increase the torque from the ring gear (V4) to the planet carrier (V3). The planet carrier (V3) moves at a reduced speed in the running direction of the engine.

Rear Planetary Gearset:
The ring gear (H4) turns at a reduced speed due to the mechanical connection to the front planet carrier (H3). The sun gear (H1) is held against the housing by the engaged multiple-disc brake B2, by the locked freewheel F2 during acceleration and by the engaged multiple-disc dutch K3 during deceleration. The planet gears (H2) turn on the fixed sun gear (H1) and increase the torque from the ring gear (H4) to the planet carrier (H3). The planet carrier (H3) moves at a reduced speed in the running direction of the engine.

Center Planetary Gearset:
The ring gear (M4) is driven at the same speed as the rear planet carrier (H3) as a result of a mechanical connection. The sun gear (M11) is held against the housing by the multiple-disc brake B2. The planet gears (M2) turn on the fixed sun gear (M1) and increase the torque from the ring gear (M4) to the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in the running direction of the engine.

Related Information: