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:
Sep. 01, 2009
Filed:
May. 22, 2006
Jonathan Chauvin, Vincennes, FR;
Philippe Moulin, Paris, FR;
Gilles Corde, Bois-Colombes, FR;
Nicolas Petit, Sceaux, FR;
Pierre Rouchon, Meudon, FR;
Jonathan Chauvin, Vincennes, FR;
Philippe Moulin, Paris, FR;
Gilles Corde, Bois-Colombes, FR;
Nicolas Petit, Sceaux, FR;
Pierre Rouchon, Meudon, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
The present invention relates to a method of estimating the fuel/air ratio in each cylinder of an injection internal-combustion engine comprising an exhaust circuit on which a detector measures the fuel/air ratio of the exhaust gas. An estimator based on a Kalman filter is coupled with a physical model representing the expulsion of the gases from the cylinders and their travel in the exhaust circuit to the detector. The method has application to engine controls.