Multi-speed transmissions with three interconnected gearsets
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United States of America Patent
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Nov 18, 2008
Grant Date -
Dec 27, 2007
app pub date -
Jun 27, 2006
filing date -
Jun 27, 2006
priority date (Note) -
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Abstract
The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least six forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having five torque-transmitting mechanisms and three interconnecting members. The powertrain includes an engine that is continuously connectable to at least one of the planetary gear members and an output shaft that is continuously connected with another one of the planetary gear members. The torque-transmitting mechanisms provide interconnections between various gear members and the transmission housing, and are operated in combinations to establish at least six forward speed ratios and at least one reverse speed ratio.
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