Invention Grant
- Patent Title: Automatic transmission for vehicle
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Application No.: US14360171Application Date: 2011-11-22
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Publication No.: US09599129B2Publication Date: 2017-03-21
- Inventor: Shinji Oita , Masaru Morise
- Applicant: Shinji Oita , Masaru Morise
- Applicant Address: JP Toyota-shi
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota-shi
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/JP2011/076956 WO 20111122
- International Announcement: WO2013/076827 WO 20130530
- Main IPC: F16H31/00
- IPC: F16H31/00 ; F15B15/02 ; F16D25/061 ; F16H3/66 ; F16H57/10 ; F16H63/30

Abstract:
A vehicle automatic transmission of a multistage type includes multiple engagement elements having an engagement state switched by an oil pressure to selectively establish a plurality of shift stages based on a combination of engagement and release of the multiple engagement elements according to an oil pressure supplied from a hydraulic circuit, each of the shift stages being established by engagement of two or more engagement elements of the multiple engagement elements, at least one of the multiple engagement elements being a normally closed engagement element engaged when no oil pressure is supplied from the hydraulic circuit, and the normally closed engagement element being a meshing engagement element.
Public/Granted literature
- US20140298790A1 AUTOMATIC TRANSMISSION FOR VEHICLE Public/Granted day:2014-10-09
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