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:
Aug. 06, 2013
Filed:
Nov. 02, 2010
Laurent Duval, Nanterre, FR;
Alexandre Pagot, Rueil Malmaison, FR;
Benoist Thirouard, Rueil Malmaison, FR;
Jean-marc Zaccardi, Rueil Malmaison, FR;
Laurent Duval, Nanterre, FR;
Alexandre Pagot, Rueil Malmaison, FR;
Benoist Thirouard, Rueil Malmaison, FR;
Jean-Marc Zaccardi, Rueil Malmaison, FR;
IFP Energies Nouvelles, Rueil-Malmaison Cedex, FR;
Abstract
An abnormal combustion detection method for spark-ignition internal-combustion engines, from combustion indicator distribution modelling is disclosed. At least one combustion indicator such as CA10 is determined. The distribution of N values of this indicator, acquired over N cycles preceding the cycle in progress, is modelled by determining coefficients of a theoretical distribution law. Modelling is repeated by removing extreme values from among the N values or for various working points of the engine, to obtain an evolution of the coefficients. At least one parameter characterizing evolution of at least one of these coefficients is determined. The start of an abnormal combustion is detected by comparing the parameter with a predetermined threshold, and the course of the abnormal combustion detected in the combustion chamber is controlled.