Patent ID: 7263872
Filing Date: 2007-09-04
Classification: F02P,G01L

Abstract:
1. A method for determining an energy (KNKE) of a knock of an internal combustion engine, of the type using an analog signal supplied by a sensor of engine knock rigidly attached to said engine, comprising steps of: a) conditioning of the analog signal, b) conversion of said analog signal into a sequence of digital samples, c) bandpass filtering of the signal, d) rectification of the signal and e) integration of the signal, in which method: i) the conditioning of the analog signal comprises the addition of said signal with a DC component (V ii) the digital filtering is carried out by means of a bandpass filter with infinite impulse response whose transfer function comprises a zero for frequencies of zero, and iii) outputting a signal whose valve is representative of a knock state of the engine.