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:
Dec. 13, 2011
Filed:
Nov. 13, 2007
Ralph Albert Dalla Betta, Mountainview, CA (US);
Joel M. Cizeron, Sunnyvale, CA (US);
David R. Sheridan, Menlo Park, CA (US);
Ralph Albert Dalla Betta, Mountainview, CA (US);
Joel M. Cizeron, Sunnyvale, CA (US);
David R. Sheridan, Menlo Park, CA (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
An exhaust aftertreatment system is provided with a large channel combustor, a fuel reformer, and a lean NOtrap. The lean NOtrap is denitrated by steps comprising: heating the fuel reformer to steam reforming temperatures by introducing vaporized fuel to the large channel combustor and combusting a portion of the vaporized fuel under lean conditions, then making the exhaust-injected fuel mixture overall rich, whereby the fuel reformer produces syn gas that denitrates the lean NOtrap. The fuel reformer has a low thermal mass, whereby it is designed to heat to at least about 500° C. and catalyze steam reforming reaction with each denitration. The large channel combustor is a monolith having an average channel size larger than the fuel reformer and a thermal mass no more than about 20% that of the fuel reformer, whereby the large channel combustor facilitates low temperature startup of the fuel reformer.