Invention Grant
- Patent Title: Method for operating an automatic gearbox on a motor vehicle
- Patent Title (中): 在汽车上操作自动变速箱的方法
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Application No.: US10566620Application Date: 2004-07-06
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Publication No.: US07935024B2Publication Date: 2011-05-03
- Inventor: Matthias Winkel , Bertram Wengert
- Applicant: Matthias Winkel , Bertram Wengert
- 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: DE10334930 20030731
- International Application: PCT/EP2004/007345 WO 20040706
- International Announcement: WO2005/018978 WO 20050303
- Main IPC: B60W10/02
- IPC: B60W10/02 ; B60W10/04

Abstract:
A method for the operation of an automatic transmission in a motor vehicle. The downshifting of the transmission takes advantage of a braking action of a driving motor connected to the automatic transmission through a clutch, are terminated by the closing of a clutch during a compression phase lasting until the achievement of a predetermined threshold speed. For the improvement of the immediacy of the vehicle drive after the termination of the compression phase, the invention provides that at speeds less than the threshold speed, downshifting is carried out and is terminated with an open clutch.
Public/Granted literature
- US20060240943A1 Method for operating an automatic gearbox on a motor vehicle Public/Granted day:2006-10-26
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