Invention Grant
- Patent Title: Wide ratio transmission with four planetary gear sets and three fixed interconnections
- Patent Title (中): 宽比传动与四个行星齿轮组和三个固定互连
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Application No.: US11685800Application Date: 2007-03-14
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Publication No.: US07686731B2Publication Date: 2010-03-30
- Inventor: Madhusudan Raghavan
- Applicant: 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 at least eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having seven torque-transmitting mechanisms and tree fixed interconnections. 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 with the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and one reverse speed ratio.
Public/Granted literature
- US20080227586A1 Wide ratio transmissions with four planetary gear sets and three fixed interconnections Public/Granted day:2008-09-18
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