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:
Feb. 08, 2005
Filed:
May. 04, 2000
Christophe Bouly, Valentigney, FR;
Thierry Pontier, La Rochelle, FR;
Christian Sarda, Dasle, FR;
Christian Bert, Epinay-sur-Orge, FR;
Marc Guyon, Arpajon, FR;
Najat Moral, Saint-Michel-sur-Orge, FR;
Thierry Birchem, Paris, FR;
Catherine Hedouin, Gouvieux, FR;
Thierry Seguelong, Puteaux, FR;
Christophe Bouly, Valentigney, FR;
Thierry Pontier, La Rochelle, FR;
Christian Sarda, Dasle, FR;
Christian Bert, Epinay-sur-Orge, FR;
Marc Guyon, Arpajon, FR;
Najat Moral, Saint-Michel-sur-Orge, FR;
Thierry Birchem, Paris, FR;
Catherine Hedouin, Gouvieux, FR;
Thierry Seguelong, Puteaux, FR;
Faurecia Systemes d'Echappement, Boulogne, FR;
Rhodia Chimie, Boulogne Billancourt, FR;
Renault, Boulogne Billancourt, FR;
Abstract
A composition for purifying exhaust gases of an internal combustion engine capable of consuming fuel with lean air-fuel ratios includes elements adsorbing the NOpresent in the exhaust gases, in the presence of excess oxygen and releasing the adsorbed NOwhen the oxygen concentration of the exhaust gases decreases. The NOadsorbing element includes in combination: a first composition comprising a support and an active phase, the active phase being based on manganese and at least another element A selected among, alkalines and alkaline-earths, the manganese and element A being chemically bound; a second composition including a support and an active phase based on manganese and at least another element B selected among alkalines, alkaline-earths and rare earths, the second composition having or being capable of having a specific surface area of at least 80 m/g after being calcined at 800° C., and furthermore, a reducing and/or three-way catalyst function is incorporated in the NOadsorbing element.