Invention Grant
US08229634B2 Method for controlling an automatic multi-step shift transmission 有权
用于控制自动多级换档变速器的方法

  • Patent Title: Method for controlling an automatic multi-step shift transmission
  • Patent Title (中): 用于控制自动多级换档变速器的方法
  • Application No.: US12676658
    Application Date: 2008-09-11
  • Publication No.: US08229634B2
    Publication Date: 2012-07-24
  • Inventor: Matthias Winkel
  • Applicant: Matthias Winkel
  • 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: DE102007044432 20070918
  • International Application: PCT/EP2008/062010 WO 20080911
  • International Announcement: WO2009/037167 WO 20090326
  • Main IPC: G06F7/00
  • IPC: G06F7/00 G06F17/00 G06F19/00
Method for controlling an automatic multi-step shift transmission
Abstract:
A method of controlling an automatic transmission of a motor vehicle that is situated in the force flow between a drive motor and an axle drive of a drive axle or a transfer box in which the current road inclination (αFB) is determined. To improve the shifting behavior of the transmission, during a transition between driving on a downhill stretch (2) and on level ground (4), after driving on the downhill stretch (2) and/or after the transition to a thrust operation, a recognition function for determining a downhill run-out (3) is initiated and, when the downhill run-out (3) is recognized, a shift to a higher gear during a thrust operation, i.e., a thrust upshift, is carried out before driving onto level ground (4) and/or before the transition to the traction operation.
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