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:
Nov. 06, 2012
Filed:
Apr. 27, 2009
Kushal Narayanaswamy, Sterling Heights, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Wei LI, Troy, MI (US);
Kevin L. Perry, Fraser, MI (US);
Steven J. Schmieg, Troy, MI (US);
Kushal Narayanaswamy, Sterling Heights, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Wei Li, Troy, MI (US);
Kevin L. Perry, Fraser, MI (US);
Steven J. Schmieg, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Engine exhaust gas feedstream NOx emissions aftertreatment includes a catalytic device and first and second ammonia selective catalytic reduction devices. The first and second ammonia-selective catalytic reduction devices each includes a base metal. Engine operation can be modulated to generate an engine-out exhaust gas feedstream that converts to ammonia. The ammonia is stored on the first and second ammonia selective catalytic reduction devices and used to reduce NOx emissions in the exhaust gas feedstream.