Method for detecting detonation phenomena in an internal combustion engine

A method for detecting the development of detonation phenomena in an internal combustion engine (1) which includes determining the variance (Ã i ) of each combustion taken into account for a given cylinder (2) and in a given engine point as a function of the comparison between the detonation energy...

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Hauptverfasser: LANZONI, RICCARDO, GARAGNANI, NICOLA, CAVANNA, FILIPPO
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A method for detecting the development of detonation phenomena in an internal combustion engine (1) which includes determining the variance (Ã i ) of each combustion taken into account for a given cylinder (2) and in a given engine point as a function of the comparison between the detonation energy (µ i ) of each combustion taken into account and the self-learnt mean detonation energy (µ i_m ) for the given cylinder (2) and in the given engine point; calculating the maximum variance (Ã i_max ) for a given cylinder (2) and in a given engine point by means of a reduction of the spark advance actuated in the given cylinder (2); and determining the development of detonation phenomena for each combustion taken into account as a function of the comparison between the maximum variance (Ã i_max ) and the variance (Ã i ) of each combustion taken into account for a given cylinder (2) and in a given engine point.