The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2014
Filed:
Jun. 02, 2011
Gabriele Serra, San Lazzaro di Savena, IT;
Matteo DE Cesare, Torremaggiore, IT;
Federico Stola, Bologna, IT;
Gabriele Serra, San Lazzaro di Savena, IT;
Matteo De Cesare, Torremaggiore, IT;
Federico Stola, Bologna, IT;
Magneti Marelli S.p.A., Corbetta, IT;
Abstract
A method for determining the rotation speed of at least one supercharger () in an internal combustion engine (); the method includes detecting, through a microphone (), the intensity of a sound signal generated by the rotation of the supercharger () and determining the evolution of the frequency content of the sound signal over time; determining, completely irrespective of the sound signal, a first estimation of the rotation speed of the supercharger () through which an interval of plausible frequencies for the rotation speed of the supercharger () may be determined; determining a second estimation of the rotation speed of the supercharger () according to the frequency content of the sound signal within the interval of plausible frequencies and validating the second estimation of the rotation speed of the supercharger () using the first estimation of the rotation speed of the supercharger ().