Six-speed powertrain and hydraulic control system for...

Details Six-speed powertrain and hydraulic control system for... Six-speed powertrain and hydraulic control system for...

2005-01-11

2005-01-11

Lewis, Tisha (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S119000, C475S120000, C475S127000, C475S133000, C475S281000, C477S122000, C477S127000

Reexamination Certificate

active

06840885

ABSTRACT:
The powertrain of a six-speed powertrain and a hydraulic control system includes a main shift section of first and second single pinion planetary gearsets, in which a first planet carrier is fixedly connected to a second ring gear. The powertrain also includes a first ring gear fixedly connected to a second planet carrier, and a first sun gear. The second planet carrier, and a second sun gear are variably connected to an input shaft through first, second, and third clutches, respectively. A connecting member connecting the first ring gear and the second planet carrier is variably connected to a housing through a first brake and a first one-way clutch. The second sun gear being variably connected to the housing by a second brake. The powertrain also includes a secondary shift section realized through a third single pinion planetary gearset, in which a third sun gear is connected to a third planet carrier via a fourth clutch, and is also connected to the housing through a third brake and a second one-way clutch.

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