Invention Grant
- Patent Title: Multi-speed transmission
- Patent Title (中): 多速传输
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Application No.: US12987799Application Date: 2011-01-10
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Publication No.: US08353801B2Publication Date: 2013-01-15
- Inventor: James M. Hart , Andrew W. Phillips , Edward W. Mellet , Scott H. Wittkopp
- Applicant: James M. Hart , Andrew W. Phillips , Edward W. Mellet , Scott H. Wittkopp
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: F16H3/62
- IPC: F16H3/62

Abstract:
The present invention provides a multiple speed automatic transmission having an input member, an output member and four planetary gear assemblies each including a sun gear, a planet gear carrier with a plurality of planet gears and a ring gear. The transmission also includes four friction brakes and two friction clutches. The transmission further includes a plurality of fixed or rigid connections. A first connection couples the ring gear of the first planetary gear assembly to the sun gear of the second planetary gear assembly. A second connection couples the planet gear carrier of the first planetary gear assembly to the planet gear carrier of the second planetary gear assembly. A third connection couples the ring gear of the third planetary gear assembly to the sun gear of the fourth planetary gear assembly. A fourth connection couples the planet gear carrier of the third planetary gear assembly to the planet gear carrier of the fourth planetary gear assembly. A fifth connection couples the ring gear of the second planetary gear assembly to the sun gear of the third planetary gear assembly.
Public/Granted literature
- US20120178579A1 MULTI-SPEED TRANSMISSION Public/Granted day:2012-07-12
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