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:
Aug. 25, 2009
Shyam Santhanam, Aurora, IL (US);
Brad Adelman, Chicago, IL (US);
Shyam Santhanam, Aurora, IL (US);
Brad Adelman, Chicago, IL (US);
International Engine Intellectual Property Company, LLC, Lisle, IL (US);
Abstract
A diesel exhaust after-treatment system () for a vehicle includes a precious metal primary diesel oxidation catalyst (DOC) and a precious metal secondary diesel oxidation catalyst (DOC). The primary diesel oxidation catalyst (DOC) is located on an exhaust pipe () and in fluid communication with and between an engine () and an exhaust gas outlet (). The secondary diesel oxidation catalyst (DOC) is disposed in fluid communication with the primary diesel oxidation catalyst (DOC) on a second exhaust pipe () and in fluid communication with the engine (). At least one valve () is disposed on the exhaust pipe () for selectively permitting the continuous, positive flow of exhaust gas through the secondary diesel oxidation catalyst (DOC). When the primary diesel oxidation catalyst (DOC) has a pre-determined amount of sulfur saturation, the valve () is switched to permit the continuous, positive flow of exhaust gas through the secondary diesel oxidation catalyst (DOC).