Multi-speed power transmission

Details Multi-speed power transmission Multi-speed power transmission

2006-10-03

2006-10-03

Bonck, Rodney H. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S330000

Reexamination Certificate

active

07115062

ABSTRACT:
A powertrain incorporates an engine and a multi-speed transmission to provide at least six forward speed ratios and as many as eight forward speed ratios. The transmission incorporates three planetary gearsets and six torque-transmitting mechanisms for six speeds or seven speeds, and seven torque-transmitting mechanisms for eight speeds.

REFERENCES:
patent: 4985011 (1991-01-01), Asada et al.
patent: 6773371 (2004-08-01), Lee et al.
patent: 7014589 (2006-03-01), Stevenson
patent: 7018318 (2006-03-01), Klemen et al.
patent: 2005/0054477 (2005-03-01), Tiesler et al.

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