Method and apparatus for controlling an automatically shifting transmission

US5157609A · kind A · utility

Assignees

• Dr. Ing. h.c. F. Porsche AG · DE
• Robert Bosch GmbH · DE
• Zahnradfabrik Friedrichshafen AG · DE

Inventors

• Heinz Stehle · Marloffstein, DE
• Thomas Wehr · Ditzingen, DE
• Joseph Petersmann · Wimsheim, DE
• Willi Seidel · Lambach, DE
• Ludwig Hamm · Sindelfingen, DE
• Thomas Foeldi · Stuttgart, DE
• Udo Judaschke · Herne, DE
• Gerhard Eschrich · Tettnang, DE
• Ronald Schwamm · Gerlingen, DE
• Wolfgang Runge · Ravensburg, DE
• Wolf-Dieter Gruhle · Tettnang, DE
• Peter Wendel · Saint Joseph, US

Key dates

• Filing date: Jul 5, 1990
• Grant date: Oct 20, 1992
• Expiry date: Jul 5, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S477/904
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In order to adapt the shifting characteristics of an electrohydraulically controlled, automatically shifting transmission continuously to the dirver's driving style or to a just existing or real time traffic situation, the driving speed (v), the lateral acceleration (aq), the longitudinal acceleration (alb), the longitudinal deceleration (alv) and the engine rotational speed (nmot) in addition to the throttle valve position alpha, are detected and by way of characteristic diagrams and a linking function are added to form a parameter from which, by filtering, a driving activity is determined. This driving activity is finally used for the selection of a shifting program from a plurality of shifting programs ranging from a consumption-optimized shifting program (SKF1) to a power-optimized shifting program (SKF5).