Six-speed powertrain of an automatic transmission

Details Six-speed powertrain of an automatic transmission Six-speed powertrain of an automatic transmission

2007-11-06

2007-11-06

Wright, Dirk (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

11221274

ABSTRACT:
Durability and power transmission efficiency are enhanced in a six-speed powertrain of an automatic transmission by a scheme that includes first to fourth planetary gearsets respectively having operational elements of a sun gear, a ring gear, and a carrier, in which the operational elements of the planetary gearsets are wisely interconnected therebetween or with an input shaft or the transmission case directly or via a clutch or a brake.

REFERENCES:
patent: 5133697 (1992-07-01), Hattori
patent: 7172526 (2007-02-01), Park
patent: 7179192 (2007-02-01), Park
patent: 2006/0052208 (2006-03-01), Park
patent: 2006/0052211 (2006-03-01), Park
patent: 2006/0052213 (2006-03-01), Park
patent: 1391635 (2004-02-01), None
patent: 2004176764 (2004-06-01), None

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