发明授权
- 专利标题: Device for the control at least of a hydraulically operable switching element of an automatic transmission
- 专利标题(中): 用于至少控制自动变速器的液压可操作的开关元件的装置
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申请号: US11451116申请日: 2006-06-12
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公开(公告)号: US07635057B2公开(公告)日: 2009-12-22
- 发明人: Georg Gierer , Thilo Schmidt , Markus Herrmann
- 申请人: Georg Gierer , Thilo Schmidt , Markus Herrmann
- 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: DE102005029589 20050625
- 主分类号: F16D48/06
- IPC分类号: F16D48/06 ; F16D25/12 ; F16H61/18
摘要:
A device for controlling a hydraulically operable switching element (2) of an automatic transmission of a vehicle with a position valve mechanism (3) having a main switch piston (6) which is spring biased into a first switch position and a second switch position with a pilot pressure (P_MV) which is adjustable through an electrically operated actuator (5). An additional switch piston (7) and the main switch piston (6) are axially actuated in a valve housing (8). Depending on the position of the pistons (6, 7), faces (6A, 7A) of the respective pistons are either spaced apart or adjacent. The additional switch piston (7) is adjustable depending on a pilot pressure (p_K) of a switching element which engages a gear for forward drive.
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