CONTROLLED COUPLING HYDRA-MATIC
FUNDAMENTALS
(pg
86)
8. For the coupling
to be efficient at high speeds, it must produce some torque
when the engine is idling. To slow down the drive torus, engine power goes
through
the front unit planetary gearset before turning the drive torus. This means
that the
fluid coupling turns slower than the engine whenever the front planetary
is in reduction
--thus reducing creeping of the car.
PLANETARY GEARS | ||
1. A planetary gear assembly consists of an internal gear, a sun gear, and the planet pinions, which are mounted on a planet carrier | ||
NOTE: The planetary assembly may have three or more pinions. Such variations in no way affect the basic operation of a planetary gear assembly. | ||
2. Three planetary units are used in the transmission to provide various reductions, direct drive and reverse. |