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:
Nov. 29, 2011
Filed:
Sep. 28, 2009
Dominique Auclair, Villiers-sur-Marne, FR;
Laurent Duval, Nanterre, FR;
Alexandre Pagot, Rueil-Malmaison, FR;
Benoist Thirouard, Rueil-Malmaison, FR;
Jean-marc Zaccardi, Seynod, FR;
Dominique Auclair, Villiers-sur-Marne, FR;
Laurent Duval, Nanterre, FR;
Alexandre Pagot, Rueil-Malmaison, FR;
Benoist Thirouard, Rueil-Malmaison, FR;
Jean-Marc Zaccardi, Seynod, FR;
IFP, Cedex, FR;
Abstract
The invention is an abnormal combustion detection method for spark-ignition internal-combustion engines. For each engine cycle, a parameter characterizing a distribution of N combustion indicator values, CA10 for example, acquired over N cycles preceding the cycle in progress, is determined while ignoring extreme values. A threshold is defined from this parameter for the combustion indicator. The start of an abnormal combustion is then detected by comparing the combustion indicator with this threshold and the course of the abnormal combustion detected in the combustion chamber is controlled.