Electrically-variable transmission with two differential gear sets
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United States of America Patent
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-
Jan 12, 2010
Grant Date -
Aug 21, 2008
app pub date -
Feb 15, 2007
filing date -
Feb 15, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electrically-variable transmission has four motive elements, including an input member, an output member, and first and second motor/generators. The transmission also has two differential gear sets, and four selectively engagable torque-transmitting mechanisms. All members of each differential gear set have at least one of the motive elements connectable therewith. The input member and one motor/generator are both connected or connectable with the same member of one of the differential gear sets, and the output member and either of the motor/generators are both connected or connectable with the same member of the other one of the differential gear sets. The torque-transmitting mechanisms are selectively engagable in combinations of two to establish input-split and output-split electrically-variable modes of operation.
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