Invention Grant
- Patent Title: Nine speed automatic transmission
- Patent Title (中): 九速自动变速器
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Application No.: US13372004Application Date: 2012-02-13
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Publication No.: US08388485B2Publication Date: 2013-03-05
- Inventor: Andrew W. Phillips , James B. Borgerson
- Applicant: Andrew W. Phillips , James B. Borgerson
- 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: F16H37/02
- IPC: F16H37/02 ; F16H3/44

Abstract:
A multispeed automatic transmission is provided having four planetary gear sets, a plurality of friction and synchronizer clutches and two chain drive assemblies. The transmission is arranged along two parallel axes of rotation: a first axis defined by the input shaft and a second axis defined by the output shaft. The chain drive assemblies transfer power between sprockets disposed on the two axes. Various combinations of clutches may be engaged to provide nine forward speed ratios and five reverse speed ratios.
Public/Granted literature
- US20120142480A1 NINE SPEED AUTOMATIC TRANSMISSION Public/Granted day:2012-06-07
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