Transmission mechanisms with three gear sets and a stationary gear member
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United States of America Patent
Stats
-
Jul 27, 2004
Grant Date -
Mar 18, 2004
app pub date -
Sep 12, 2002
filing date -
Sep 12, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least seven forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having six torque-transmitting mechanisms and a fixed interconnection. Also, one planetary gear member is continuously connected with the transmission housing. 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 six torque-transmitting mechanisms provide interconnections between various gear members, the fixed interconnections, the input shaft, the output shaft, and the transmission housing, and are operated in combinations of three to establish at least seven forward speed ratios and at least one reverse speed ratio.
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