Invention Grant
- Patent Title: Method for controlling an automatic transmission
- Patent Title (中): 用于控制自动变速器的方法
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Application No.: US11628565Application Date: 2005-06-03
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Publication No.: US07771315B2Publication Date: 2010-08-10
- Inventor: Rupert Kramer , Mario Steinborn
- Applicant: Rupert Kramer , Mario Steinborn
- 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: DE102004027597 20040605
- International Application: PCT/EP2005/005980 WO 20050603
- International Announcement: WO2005/121606 WO 20051222
- Main IPC: F16H59/30
- IPC: F16H59/30 ; F16H61/00 ; B60W10/04

Abstract:
A method for the control of an automatic transmission during a change of ratio procedure, wherein the synchronous speed of rotation (SD) for the new transmission gear-stage lies under the no-load speed of rotation (LD) of a drive motor which can be connected to the transmission and wherein a gear-stage engagement actuator for the engagement of a new transmission gear-stage is then activated, when the transmission input speed of rotation (GED) has reached a predetermined speed of rotation window (F), which window also encompasses the synchronous speed of rotation (SD). In order to make such a shifting method more comfortable than previously, the invented method deviates from that procedure based on downshifting, which has been customary up to this time and rather proceeds in a upshifting mode.
Public/Granted literature
- US20080261772A1 Method for Controlling an Automatic Transmission Public/Granted day:2008-10-23
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