8-speed transmissions
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United States of America Patent
Stats
-
Aug 31, 2010
Grant Date -
Jan 22, 2009
app pub date -
Jul 19, 2007
filing date -
Jul 19, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes three planetary gear sets, six torque-transmitting devices, one fixed interconnection and a grounded member. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.
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