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

Andreas Bader

Peter Baur

Thomas Gruenter

Jan-Peter Hoffmeister

Moritz Martiny

Jochen Möckl

Holger Ackermann

A method and device are provided for limiting, in a first operating condition, a motor vehicle internal-combustion engine torque. The operating condition, resulting from an operation of a motor vehicle brake, when the engine torque is simultaneously demanded by a driver's intention indicator, differs from a second operating condition, in which the brake is not operated. The limiting takes place at least partially by way of a controlled reduction of an advance angle efficiency in the first operating condition in comparison to the second operating condition.

Method and device for controlling an internal-combustion engine before a starting operation

A method for limiting the rotational speed in an internal combustion engine is provided. A detection device detects prevailing operating parameters. Based on the prevailing operating parameters, the control variables for the ignition, injection and throttle valve position are determined. When the prevailing rotational speed (n) reaches a preselectable maximum rotational speed value (n), through a change in at least one of the control variables, the rotational speed is limited to this preselectable maximum rotational speed value, and a hard rotational speed limitation is achieved by fade-in and fade-out of the injection and/or by intervention in the ignition with simultaneous support by the throttle valve and whereby a soft rotational speed limitation is achieved by retarding the ignition and by varying the throttle valve. Activation of a soft rotational speed limitation or hard rotational speed limitation is coordinated by the control unit according to the requirements of driving performance.

Method for limiting the rotational speed of internal combustion engines

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Neuhausen, Germany

Andreas Bader