Planetary transmissions having one interconnecting member and an input member
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United States of America Patent
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Jun 6, 2006
Issued Date -
N/A
app pub date -
Jul 23, 2004
filing date -
Jul 23, 2004
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 eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and a fixed interconnection. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and with the transmission housing, and are operated in combinations of four to establish at least eight forward speed ratios and at least one reverse speed ratio.
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