Invention Grant
- Patent Title: 8-speed transmission
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Application No.: US11757681Application Date: 2007-06-04
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Publication No.: US07695397B2Publication Date: 2010-04-13
- Inventor: James M. Hart , Andrew W. Phillips , Clinton E. Carey , Scott H. Wittkopp , Madhusudan Raghavan
- Applicant: James M. Hart , Andrew W. Phillips , Clinton E. Carey , Scott H. Wittkopp , Madhusudan Raghavan
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations, Inc.
- Current Assignee: GM Global Technology Operations, Inc.
- Current Assignee Address: US MI Detroit
- Agency: Quinn Law Group, PLLC
- Main IPC: F16H3/62
- IPC: F16H3/62

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 having six torque-transmitting mechanisms and two 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 mechanisms provide interconnections between various gear members, the transmission housing and with the input member, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.
Public/Granted literature
- US20080300088A1 8-Speed Transmission Public/Granted day:2008-12-04
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