Method and device for recognizing the knocking of an internal-combustion engine

Device for detecting knocking in an internal combustion engine, said device comprising

• a knock sensor for generating a sensor signal characteristic of said knocking in said internal combustion engine;
• an analog/digital converter connected to said knock sensor to receive said sensor signal and to generate a digitized signal;
• processor means for high pass filtration and analysis of said sensor signal to detect a presence of a knocking condition in said internal combustion engine,
• wherein said processor means includes high-pass filter means for high-pass filtration of said digitized signal to form a high frequency signal comprising a plurality of oscillations having amplitudes, means for counting said amplitudes of said oscillations of said high frequency signal greater than a first threshold value (P1) to form an amplitude count;
• means for integrating an absolute value of said high-frequency signal to obtain an integrated signal;
• means for comparing said integrated signal to a second threshold value (P2);
• and means for generating an output signal indicating said knocking is occurring when said amplitude count is at least one and said integrated signal is greater than said second threshold value.