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. 08, 2006
Filed:
Mar. 07, 2005
Philippe Moulin, Paris, FR;
Gilles Corde, Bois-Colombes, FR;
Michel Castagne, Nanterre, FR;
Grégory Rousseau, Clichy, FR;
Philippe Moulin, Paris, FR;
Gilles Corde, Bois-Colombes, FR;
Michel Castagne, Nanterre, FR;
Grégory Rousseau, Clichy, 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 a multicylinder internal-combustion engine comprising an exhaust circuit in which a single detector measures the fuel/air ratio of the exhaust gas. The estimator comprises a physical model (RTM) representing the expulsion of the gases from the cylinders and the travel thereof in the exhaust circuit to the detector, the model being coupled with a non-linear state observer of Extended Kalman Filter (KF) type.