Invention Grant
- Patent Title: Method for controlling a shift point in an automatic transmission
- Patent Title (中): 用于控制自动变速器中的换档点的方法
-
Application No.: US12463805Application Date: 2009-05-11
-
Publication No.: US08224536B2Publication Date: 2012-07-17
- Inventor: Markus Pfisterer , Arman Kara
- Applicant: Markus Pfisterer , Arman Kara
- Applicant Address: DE Munich
- Assignee: Beyerische Motoren Werke Aktiengesellschaft
- Current Assignee: Beyerische Motoren Werke Aktiengesellschaft
- Current Assignee Address: DE Munich
- Agency: Barley Snyder
- Priority: DE102008023805 20080515
- Main IPC: G06F7/00
- IPC: G06F7/00

Abstract:
The method according to the invention for shift point control in automatic transmissions by means of an electronic control device, which receives a performance requirement value and the vehicle speed as input signals and triggers up-shifts and down-shifts, by means of a functional module. The functional module controls the shift point, by using characteristic shift curves stored in the control device as a function of the performance requirement value and the vehicle speed. When predetermined operating conditions apply, a speed range is defined below a defined vehicle speed, in which range an instantaneous down-shift is performed, which is independent of the currently applicable characteristic shift curve. As soon as the performance requirement value or an operating value proportional to the performance requirement value falls below a threshold, an up-shift subsequent to the down-shift is delayed by a first predetermined time period after the instantaneous down-shift.
Public/Granted literature
- US20090287385A1 Method For Controlling A Shift Point In An Automatic Transmission Public/Granted day:2009-11-19
Information query