Invention Grant
- Patent Title: Control device for automatic transmission
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Application No.: US15491221Application Date: 2017-04-19
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Publication No.: US10563737B2Publication Date: 2020-02-18
- Inventor: Yoshio Hasegawa , Masakazu Owatari , Norihiro Tsukamoto
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Applicant Address: JP Toyota
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota
- Agency: Oliff PLC
- Priority: JP2016-089013 20160427
- Main IPC: F16H3/66
- IPC: F16H3/66 ; F16H61/02

Abstract:
An automatic transmission, which is configured such that there is no difference of rotation between a third sun gear and an intermediate shaft in a state where a second clutch is brought into a release state and a seventh speed stage is established, is provided. In the automatic transmission, at the time of a gear shift from a tenth speed stage where second and third clutches and a first brake are brought into an engagement state to a seventh speed stage where first, third, and fourth clutches are brought into an engagement state, the fourth clutch is engaged and the first brake is released to establish the seventh speed stage with the second clutch in the engagement state. Then, the first clutch is engaged and the second clutch is released to make transition to the seventh speed stage with the second clutch in the release state.
Public/Granted literature
- US20170314648A1 CONTROL DEVICE FOR AUTOMATIC TRANSMISSION Public/Granted day:2017-11-02
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