Invention Grant
- 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
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Application No.: US12676658Application Date: 2008-09-11
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Publication No.: US08229634B2Publication 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

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.
Public/Granted literature
- US20100324793A1 METHOD FOR CONTROLLING AN AUTOMATIC MULTI-STEP SHIFT TRANSMISSION Public/Granted day:2010-12-23
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