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:
May. 11, 2004
Filed:
Dec. 30, 2002
Applicant:
Inventors:
Rudolf H. Stanglmaier, Fort Collins, CO (US);
Ryan C. Roecker, San Antonio, TX (US);
Charles E. Roberts, Jr., San Antonio, TX (US);
Daniel W. Stewart, Helotes, TX (US);
Assignee:
Southwest Research Institute, San Antonio, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 ;
U.S. Cl.
CPC ...
F01N 3/00 ;
Abstract
A very high efficiency NO aftertreatment system is provided for use in lean burn engines. A lean NO adsorber is synergistically combined with a selective catalytic reduction catalyst to use the ammonia formed within the NO adsorber, during regeneration of the NO adsorber while periodically operating the engine in a fuel-rich combustion mode, to reduce NO remaining in the exhaust gas stream after passage through the NO adsorber during normal operation of the engine in a lean burn combustion mode.