Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-02-13
2007-02-13
Kwon, John T. (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C123S361000, C123S334000
Reexamination Certificate
active
11195612
ABSTRACT:
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 (nact) reaches a preselectable maximum rotational speed value (nmax), 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.
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Crowell & Moring LLP
Dr. Ing. h.c.F. Porsche Aktiengesellschaft
Kwon John T.
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