Multiple-speed automatic transmission for an automotive vehicle

Details Multiple-speed automatic transmission for an automotive vehicle Multiple-speed automatic transmission for an automotive vehicle

1996-10-28

1998-09-01

Ta, Khoi Q.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475275, F16H 344

Patent

active

058003045

ABSTRACT:
A kinematic arrangement of an automatic transmission includes three planetary gear units having certain of their elements fixed to other elements mutually, a one-way coupler for holding the sun gear of the first gear unit, a clutch arranged in parallel with the coupler, a friction clutch driveably connecting a transmission input shaft to the sun gear of the first gear unit, a second friction clutch for driveably connecting the pinion carriers of the second and third gear units to the input shaft, a friction brake for holding the sun gear of the second gear unit against rotation, and a brake band for selectively holding the pinion carriers of the second and third gear units against rotation.

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