Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Scott H. Wittkopp0
Andrew W. Phillips0
Clinton E. Carey0
James M. Hart0
Date of Patent
June 8, 2010
0Patent Application Number
117748690
Date Filed
July 9, 2007
0Patent Primary Examiner
Patent abstract
The transmission has a plurality of members that can be utilized in powertrains to provide nine forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets, six torque-transmitting devices, and four fixed interconnections. 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 nine forward speed ratios and one reverse speed ratio.
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