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:
Apr. 05, 2011
Filed:
Nov. 24, 2004
Rémi Noirot, Garchizy, FR;
Michel Castagne, Nanterre, FR;
Jean-baptiste Dementhon, Paris, FR;
Institut Francais du Petrole, Cedex, FR;
Peugeot Citroen Automobiles SA, PCA SA, Velizy-Villacoublay, FR;
Abstract
A method is intended for desulfation of a nitric oxide trap () and regeneration of a particle filter () arranged in an exhaust line () for treating exhaust gas from an internal-combustion engine (), notably a Diesel engine. The saturation rate of the trap and the clogging rate of the filter are evaluated and, as soon as one of the rates reaches a threshold value, the fuel/air ratio of the exhaust gas is increased without it reaching a fuel/air ratio of 1, then desulfation of trap () is performed in association with regeneration of particle filter ().