Invention Grant
- Patent Title: Continuously variable transmission including a layshaft gearset
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Application No.: US16079850Application Date: 2016-04-11
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Publication No.: US11204084B2Publication Date: 2021-12-21
- Inventor: Chengwu Duan , Jian Yao
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- International Application: PCT/CN2016/078953 WO 20160411
- International Announcement: WO2017/177360 WO 20171019
- Main IPC: F16H37/00
- IPC: F16H37/00 ; F16H37/02

Abstract:
A torque transmission device (100) includes a variator of a continuously variable unit (CVU) (20) arranged in parallel with a layshaft gearset (30). The CVU (20) includes a first pulley (22) rotatably coupled to a second pulley (24), and the layshaft gearset (30) includes a first gear element (32) meshingly engaged with an intermediate gear element (34) meshingly engaged with a second gear element (36). A transmission input member (12) is rotatably coupled to the first pulley (22) of the CVU (20), and is selectively rotatably coupled to the first gear element (32) of the layshaft gearset (30) by activation of a first clutch (37). A transmission output member (14) is rotatably coupled to the second pulley (24) of the CVU (20) and rotatably coupled to the second gear element (36) of the layshaft gearset (30). The transmission is disposed to operate in a continuously variable mode when the first clutch (37) is disengaged, and to operate in a fixed gear mode when the first clutch (37) is engaged.
Public/Granted literature
- US20210180667A1 CONTINUOUSLY VARIABLE TRANSMISSION INCLUDING A LAYSHAFT GEARSET Public/Granted day:2021-06-17
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