Patent ID: 8676534
Filing Date: 2014-03-18
Classification: F01D,F01N,F02B,F02D,G01P,Y02T

Abstract:
1. Method for determining a rotation speed of at least one supercharger ( 14 ) which compresses a sucked air in an internal combustion engine ( 1 ); the determination method, during a normal operation of the internal combustion engine ( 1 ), comprises the steps of: detecting, by means of a microphone ( determining an evolution in time of a frequency content of the sound signal generated by the rotation of the supercharger ( the determination method is wherein it comprises the further steps of: acquiring, in a preliminary setting-up and design phase, the nominal operation characteristic of the supercharger ( determining, completely irrespective of the sound signal generated by the rotation of the supercharger ( determining an interval of plausible frequencies of the rotation speed of the supercharger ( determining a second estimation of the rotation speed of the supercharger ( validating the second estimation of the rotation speed of the supercharger (