Wide ratio transmissions with a fixed interconnecting member and a stationary planetary member
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United States of America Patent
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Jun 13, 2006
Grant Date -
Nov 10, 2005
app pub date -
May 10, 2004
filing date -
May 10, 2004
priority date (Note) -
Expired
status (Latency 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 interconnecting member. 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 the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.
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