Abstract: A method for handling uncontrolled combustions in an internal combustion engine of a motor vehicle, the uncontrolled combustions occurring independently of the ignition by a spark plug and being detected in or at the internal combustion engine. To allow a rapid yet reliable reduction of uncontrolled combustions in an internal combustion engine in order to protect the internal combustion engine from damage, the number of detected uncontrolled combustions in a monitoring period is determined and compared to a threshold value. A temperature in a combustion chamber of the internal combustion engine is dropped if the threshold value is exceeded.

Abstract: The invention relates to a method for setting an emergency operational mode in a system which detects pre-ignitions in a combustion engine and which contains errors. The system consists of at least one sensor (17) and/or at least one sensor cable (24) and/or a sensor signal evaluation device (20), and is subject to a diagnosis to detect an error. In order to prevent damage to the combustion engine if the system for detecting pre-ignitions does contain an error, a standard path (26), which comprises sensor signal capturing, sensor signal evaluation, detection of pre-ignitions and initiation of measures to counter the pre-ignitions, is interrupted when the diagnosis detects an error in the system (17, 24, 29), and a safety path (27) is activated as an emergency operational mode.

Abstract: A method for handling uncontrolled combustions in an internal combustion engine of a motor vehicle, the uncontrolled combustions occurring independently of the ignition by a spark plug and being detected in or at the internal combustion engine. To allow a rapid yet reliable reduction of uncontrolled combustions in an internal combustion engine in order to protect the internal combustion engine from damage, the number of detected uncontrolled combustions in a monitoring period is determined and compared to a threshold value. A temperature in a combustion chamber of the internal combustion engine is dropped if the threshold value is exceeded.

Abstract: For detecting a backward revolution of a revolving component of an internal combustion engine, with a sensor which senses a revolving component having at least one angular mark, the backward revolution is assumed when a prescribable value between two pulses of the signal of the sensor is exceeded, and stalling is detected after it is ensured that the backward revolution of the internal combustion engine has taken place, and outputting of further injections and/or ignitions is suppressed until a resynchronization of the system takes place after a prescribable time has passed.

Abstract: A method of electronic engine control for a motor vehicle includes sensing an ignition voltage of a final ignition stage, effecting a performance check of the final ignition stage in response to a control signal generated in response to sensing the ignition voltage of a final ignition stage, and providing an error flag if the control signal deviates from a predetermined control signal. An apparatus for performing the foregoing method comprises an electric control circuit that includes a sensor for detecting the ignition voltage, and control means that effects a performance check in response to a sensor output signal and emits the error flag in response to an error control signal.