Invention Grant
- Patent Title: Control valve arrangement for controlling a starting clutch of an automatic transmission
- Patent Title (中): 用于控制自动变速器起动离合器的控制阀装置
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Application No.: US12065670Application Date: 2006-10-13
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Publication No.: US07780572B2Publication Date: 2010-08-24
- Inventor: Georg Gierer , Thilo Schmidt , Anton Fritzer , Markus Herrmann
- Applicant: Georg Gierer , Thilo Schmidt , Anton Fritzer , Markus Herrmann
- Applicant Address: DE Friedrichshafen
- Assignee: ZF Friedrichshafen AG
- Current Assignee: ZF Friedrichshafen AG
- Current Assignee Address: DE Friedrichshafen
- Agency: Davis & Bujold, P.L.L.C.
- Priority: DE102005050489 20051021
- International Application: PCT/EP2006/009903 WO 20061013
- International Announcement: WO2007/045400 WO 20070426
- Main IPC: B60W10/02
- IPC: B60W10/02 ; F16H61/26

Abstract:
A control valve arrangement having a clutch regulation valve (3), which pressurizes a device to actuate the clutch, and a valve that produces a controlled pilot pressure (P_VST3). An electronic control unit (ECU) controls a valve to supply a control valve with the pressure (P_VST3). The arrangement further having a hydraulic system which, if the ECU fails and the pressure (P_VST3) ceases, the last shift condition of the clutch actuation device, prior to the ECU failure, can be maintained in an emergency. The arrangement includes a valve, which delivers an activation pressure (P_A), depending on an engine-speed-dependent control pressure (P_D), to an actuation valve (2), which then delivers the pressure (P_A) to the valve (3) to prevent the emergency function initiation despite a lack of pressure (P_VST3) and existence of the pressure (P_D) sufficiently high to initiate the emergency function.
Public/Granted literature
- US20080234100A1 Control Valve Arrangement for Controlling a Starting Clutch of an Automatic Transmission Public/Granted day:2008-09-25
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