Mannesmann Vdo Ag

Thomas Hopf

Ulrich Staufenberg

A method for the determination of combustion misfires in an internal combustion engine having a plurality of cylinders, there being provision, for determining at least two successive compression times and expansion times for at least one cylinder of the internal combustion engine, for the determination of combustion misfires a comparison of the change in the compression times with the change in the expansion times being carried out, and the result of the comparison being a measure of a combustion misfire.

Method of determining misfiring

A control system, particularly for a motor vehicle, having at least one control device which, in order to produce control parameters, is connected with a timer circuit for the production of a time parameter. In order to provide a control system in which a timer signal is available at all times, without the voltage supply system of the motor vehicle being under load when the engine is turned off, the timer circuit is located outside the control device.

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Bensheim, Germany

Thomas Hopf