Gear train of an automatic transmission for a vehicle

Details Gear train of an automatic transmission for a vehicle Gear train of an automatic transmission for a vehicle

2006-11-20

2009-11-10

Estremsky, Sherry L (Department: 3655)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S280000, C475S288000

Reexamination Certificate

active

07614975

ABSTRACT:
A gear train of an automatic transmission for a vehicle includes first and second shifting sections and a plurality of friction members, wherein: the first shifting section includes first and second simple planetary gear sets forming a first input path for directly receiving an input shaft rotation speed and an intermediate output path for outputting a reduced speed of the first shifting section; and the second shifting section includes third and fourth simple planetary gear sets forming a first intermediate input path for variably receiving an input shaft rotation speed, a second intermediate input path for receiving the reduced speed of the first shifting section through the intermediate output path and also for variably receiving an input shaft rotation speed, and a final output path for outputting a modified speed of the second shifting section.

REFERENCES:
patent: 4683776 (1987-08-01), Klemen
patent: 7204780 (2007-04-01), Klemen
patent: 7285069 (2007-10-01), Klemen

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