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:
Sep. 19, 2017
Filed:
Feb. 09, 2016
Michael a Smith, Clarkston, MI (US);
Craig L Dimaggio, Troy, MI (US);
Jeffrey P Wuttke, Sterling Heights, MI (US);
Andrew Brocker, Brighton, MI (US);
Travis T Hamilton, Westland, MI (US);
Ken Hardman, Clarkston, MI (US);
Cody Baldwin-squib, White Lake, MI (US);
Michael A Smith, Clarkston, MI (US);
Craig L Dimaggio, Troy, MI (US);
Jeffrey P Wuttke, Sterling Heights, MI (US);
Andrew Brocker, Brighton, MI (US);
Travis T Hamilton, Westland, MI (US);
Ken Hardman, Clarkston, MI (US);
Cody Baldwin-Squib, White Lake, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A system and method for utilizing fuel as an on-board reductant for selective catalytic reduction of NOx is provided and includes a controller for controlling an engine to produce a lean first exhaust stream and a rich second exhaust stream that are received in respective first and second passageways of a dual path aftertreatment system. The rich second exhaust stream reacts with NOx stored in a NOx storage and reduction catalyst of the second passageway to regenerate this catalyst and generate ammonia. The first exhaust stream and the second exhaust stream having the generated ammonia are combined in a downstream common passageway to form a combined lean exhaust gas stream where the ammonia carried therein is stored or used by an SCR catalyst of the common passageway for NOx reduction. The engine is subsequently controlled to produce a rich first exhaust stream and a lean second exhaust stream.