Methods and apparatus for controlling shifting processes in a ve

Details Methods and apparatus for controlling shifting processes in a ve Methods and apparatus for controlling shifting processes in a ve

1997-09-18

1999-11-30

Louis-Jacques, Jacques H.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 54, 701 87, 477901, 477133, 477107, 477110, G06F 1700

Patent

active

059958960

ABSTRACT:
A method for the control of shifting processes in a vehicle transmission from an initial gear to the next higher target gear includes the steps of continuously determining the vehicle acceleration (a) and the driven rpm (n.sub.2) behind the vehicle transmission. A shifting process is triggered when the acceleration value (a) and the essentially simultaneously recorded driven rpm value (n.sub.2) fall on a shifting point which lies on a shifting characteristic (n.sub.2 (a)) in an acceleration-driven rpm diagram, where the shifting characteristic (n.sub.2 (a)) has a stepped course with at least two break points (a.sub.-- max; a.sub.-- min) and the slope of the shifting characteristic for acceleration values a.sub.-- min<a<a.sub.-- max is always smaller than or equal to the slope of the shifting characteristic for acceleration values a.ltoreq.a.sub.-- min or a.gtoreq.a.sub.-- max. In other words, the following applies:

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