Multiple-speed power transmission for motor vehicles

Details Multiple-speed power transmission for motor vehicles Multiple-speed power transmission for motor vehicles

2005-06-21

2005-06-21

Marmor, Charles A. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S275000, C475S276000, C475S280000, C475S281000, C475S282000, C475S283000, C475S286000, C475S287000

Reexamination Certificate

active

06908408

ABSTRACT:
A multiple-speed transmission for use in an automotive vehicle driveline includes a torque converter, three simple planetary gear units, or two simple planetary gear units and a compound planetary gear unit, friction clutches and brakes, and an optional one-way coupling. The engaged and disengaged states of the friction elements permit the transmission to produce several underdrive speed ratios, a direct drive ratio, and several overdrive speed ratios.

REFERENCES:
patent: 3996817 (1976-12-01), Winzeler
patent: 4070927 (1978-01-01), Polak
patent: 5106352 (1992-04-01), Lepelletier
patent: 5226862 (1993-07-01), Hattori
patent: 5435792 (1995-07-01), Justice et al.
patent: 6517463 (2003-02-01), Sugiura et al.
patent: 6705969 (2004-03-01), Bucknor et al.
patent: 6736752 (2004-05-01), Usoro et al.
patent: 2001/0034284 (2001-10-01), Sugiura et al.

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