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. 25, 2014
Filed:
Sep. 18, 2009
Dominique Auclair, Villiers-sur-Marne, FR;
Laurent Duval, Nanterre, FR;
Alexandre Pagot, Rueil-Malmaison, FR;
Jean-marc Zaccardi, Seynod, FR;
Dominique Auclair, Villiers-sur-Marne, FR;
Laurent Duval, Nanterre, FR;
Alexandre Pagot, Rueil-Malmaison, FR;
Jean-Marc Zaccardi, Seynod, FR;
IFP, Rueil-Malmaison Cedex, FR;
Abstract
A method for detection of abnormal combustion for internal combustion engines is disclosed. A physical model is chosen that describes, as a function of the angle α of rotation of the engine crankshaft, the development of pressure in the cylinder during combustion without any pre-ignition phenomenon. The cylinder pressure P(α) is estimated using this model and the intake pressure is measured. The beginning of abnormal combustion is detected by comparing a first value of a variable calculated using the measurement of the cylinder pressure, to a second value of the variable calculated using the estimation of the cylinder pressure. The amplitude of the pre-ignition is determined by repeating these steps for a defined number of crankshaft angles. Then the progress of the abnormal combustion detected in the combustion chamber is controlled as a function of the amplitude of the pre-ignition phenomenon.