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:
Oct. 10, 2006
Filed:
May. 05, 2004
Wayne Scott Kaboord, Mequon, WI (US);
Dawn Marie Becher, Random Lake, WI (US);
Fred Joseph Begale, Oconomowoc, WI (US);
Daniel Woodrow Fellers, Milwaukee, WI (US);
John Albert Kovacich, Waukesha, WI (US);
Steven M. Kuznicki, Edmonton, CA;
Wayne Scott Kaboord, Mequon, WI (US);
Dawn Marie Becher, Random Lake, WI (US);
Fred Joseph Begale, Oconomowoc, WI (US);
Daniel Woodrow Fellers, Milwaukee, WI (US);
John Albert Kovacich, Waukesha, WI (US);
Steven M. Kuznicki, Edmonton, CA;
Eaton Corporation, Cleveland, OH (US);
Abstract
The invention relates to systems for removing NOx from exhaust. In one aspect of the invention, after adsorption, an NOx adsorber is isolated from the main exhaust flow and desorption induced by raising the temperature. The desorbed NOx is combined with a reductant and reduced over a catalyst. Preferably, the reductant is syn gas produced in an on-board reformer. The catalyst need never be exposed to the main exhaust flow, which is particularly advantageous for catalysts sensitive to water, oxygen, or sulfur. In another aspect of the invention, a recirculating flow is induced through an NOx adsorber during a regeneration cycle. Recirculation can induce greater desorption at a given temperature, provide a source of heat for the adsorber, and allow a higher conversion rate with a fixed amount of catalyst. A further aspect of the invention relates to a vehicle-mounted adsorbers with provisions for heating.