Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Robert Boschgmbh

Zf Friedrichshafen Ag

Zahnradfabrik Friedrichshafen, Ag.

Zf Friedrichshafen

Peter Wendel

Willi Seidel

Joseph Petersmann

Gerhard Eschrich

Wolfgang Runge

Heinz Stehle

Wolf-Dieter Gruhle

Thomas Wehr

Ronald Schwamm

Thomas Foeldi

Ludwig Hamm

Friedemann Jauch

Friedrich Reiter

Udo Judaschke

Manfred Escher

Wolf Dieter Gruhle

Process for controlling an automatic gearbox

Electronic control process for an automatic transmission

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).

Method and apparatus for controlling an automatically shifting

In order to improve the shifting characteristics of an electrohydraulically controlled, automatically shifting transmission particularly during cornering and braking, the driving speed (v), the lateral acceleration (aq), and the time variation of the throttle valve position are sensed in addition to the throttle valve position (alpha) and the engine rotational speed (nmot). From the time variation of the throttle valve position, a signal can be derived for the prevention of an upshifting operation since a motor vehicle driver's foot moves away faster from the accelerator pedal when approaching a bend in the road than would be the case for the normal deceleration of the motor vehicle.

Method and apparatus for controlling an automatic shift transmission

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Kressbronn, Germany

Peter Wendel