Invention Grant
- Patent Title: Hydraulic control device for automatic transmission
- Patent Title (中): 液压控制装置自动变速器
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Application No.: US12292888Application Date: 2008-11-28
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Publication No.: US07993231B2Publication Date: 2011-08-09
- Inventor: Tetsuya Shimizu , Kenichi Tsuchida , Akitomo Suzuki , Kazunori Ishikawa , Masamichi Yamaguchi , Satoshi Nishio
- Applicant: Tetsuya Shimizu , Kenichi Tsuchida , Akitomo Suzuki , Kazunori Ishikawa , Masamichi Yamaguchi , Satoshi Nishio
- Applicant Address: JP Anjo
- Assignee: Aisin AW Co., Ltd.
- Current Assignee: Aisin AW Co., Ltd.
- Current Assignee Address: JP Anjo
- Agency: Oliff & Berridge, PLC
- Priority: JP2007-311250 20071130; JP2008-212217 20080820
- Main IPC: F16H61/00
- IPC: F16H61/00

Abstract:
A hydraulic control device for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switching valve, and a hydraulic pressure supply switching valve. A second friction engagement element is engaged at high speed side shift speeds, a low speed that is one of low speed side shift speeds is achieved by engagement of a first friction engagement element and a third friction engagement element, and a high speed that is one of the high speed side shift speeds is achieved by engagement of a second friction engagement element and the third friction engagement element.
Public/Granted literature
- US20090143180A1 Hydraulic control device for automatic transmission Public/Granted day:2009-06-04
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