Invention Grant
US08667885B2 Actuating device for a shift element of a transmission device which can be applied with an actuating pressure 有权
用于可施加致动压力的变速器装置的变速元件的致动装置

  • Patent Title: Actuating device for a shift element of a transmission device which can be applied with an actuating pressure
  • Patent Title (中): 用于可施加致动压力的变速器装置的变速元件的致动装置
  • Application No.: US12950062
    Application Date: 2010-11-19
  • Publication No.: US08667885B2
    Publication Date: 2014-03-11
  • Inventor: Thilo SchmidtGeorg Gierer
  • Applicant: Thilo SchmidtGeorg Gierer
  • Applicant Address: DE Friedrichshafen
  • Assignee: ZF Friedrichshafen AG
  • Current Assignee: ZF Friedrichshafen AG
  • Current Assignee Address: DE Friedrichshafen
  • Agency: Davis & Bujold, PLLC
  • Agent Michael J. Bujold
  • Priority: DE102009054541 20091211
  • Main IPC: F16H61/28
  • IPC: F16H61/28
Actuating device for a shift element of a transmission device which can be applied with an actuating pressure
Abstract:
An actuating device for a shift element of a transmission which is acted upon by a hydraulic actuating pressure (p_B1) and comprises a valve device. To vary the actuating pressure (p_B1), the valve device is acted upon by a control pressure (p_EDS) in an area of active surfaces (A18, A19) of at least a first and a second valve slides. An active surface (A38) of the first valve slide (A8) is acted upon by a hydraulic pressure (p_B2) which is equivalent to the actuating pressure (p_B1), acts in opposition to the control pressure (p_EDS) and can be adjusted as a function of the control pressure (p_EDS) applied, such that a smaller variation of the actuating pressure (p_B1) results from a change of the control pressure (p_EDS) within a first pressure range of the control pressure (p_EDS) than within a second pressure range of the control pressure (p_EDS).
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