Planetary gear transmission systems or components – Input from independent power sources – Including electric motor input
Reexamination Certificate
2006-09-13
2009-08-18
Estremsky, Sherry L (Department: 3655)
Planetary gear transmission systems or components
Input from independent power sources
Including electric motor input
C475S010000, C475S207000, C903S917000
Reexamination Certificate
active
07575529
ABSTRACT:
An electrically variable transmission having a single motor/generator provides electrically variable power flow along dual power paths and provides an electrically variable reverse operating mode. The transmission includes a compound differential gear set having at least four gear elements operatively interconnected with one another. A transmission input member and the single motor/generator selectively provide power to a transmission output member via the differential gear set. The transmission includes a plurality of intermeshing gears, including a reversing gear and gears connected for rotation with the output member, for operatively connecting the differential gear set with the output member. Torque-transmitting mechanisms are selectively engagable to provide power flow between the input member and the output member in multiple operating modes, including a parallel hybrid electrically variable reverse operating mode utilizing the reversing gear. A method of operating a transmission that allows shifting between different gearing portions of the transmission is provided.
REFERENCES:
patent: 5011463 (1991-04-01), Jarchow et al.
patent: 6645105 (2003-11-01), Kima
patent: 6716126 (2004-04-01), Bowen
Bishop Erin D
Estremsky Sherry L
GM Global Technology Operations Inc.
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