发明授权
- 专利标题: Electroyhydraulic control device of a gear unit
- 专利标题(中): 减速器电液控制装置
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申请号: US12257530申请日: 2008-10-24
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公开(公告)号: US08070636B2公开(公告)日: 2011-12-06
- 发明人: Georg Gierer , Thilo Schmidt
- 申请人: Georg Gierer , Thilo Schmidt
- 申请人地址: DE Friedrichshafen
- 专利权人: ZF Friedrichshafen AG
- 当前专利权人: ZF Friedrichshafen AG
- 当前专利权人地址: DE Friedrichshafen
- 代理机构: Davis & Bujold P.L.L.C.
- 优先权: DE102007000561 20071024
- 主分类号: F16H61/12
- IPC分类号: F16H61/12
摘要:
An electrohydraulic control device (1) of an 8-speed transmission having several electrically controllable pressure control valves (6-12) for hydraulically actuating five switching elements (A-E) and an electric gear control unit via which different operating states of the transmission may be adjusted. Three of the switching elements are connected in the force flow of the transmission for representing a gear ratio (“1” to “R”) of the transmission. When the gear control unit is de-activated and the power supply to the solenoid valve and pressure control valves is interrupted, and when the transmission is in the operating state, in which a gear ratio (“1”; “2”; “3”; “4”; “5”; “6”; “7”; “8”; “R”) is engaged, a predefined emergency transmission (“6”; “R”) is represented by three simultaneously hydraulically connected switching elements (C, D, E, A, B, D).
公开/授权文献
- US20090111636A1 ELECTROYHYDRAULIC CONTROL DEVICE OF A GEAR UNIT 公开/授权日:2009-04-30
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