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. 02, 2014
Filed:
Jun. 14, 2012
Alexey A. Dubkov, Aachen, DE;
Mario Balenovic, Waalre, NL;
Jan Harmsen, Simpelveld, NL;
Robert Ukropec, Aachen, DE;
Brendan Patrick Carberry, Aachen, DE;
Alexey A. Dubkov, Aachen, DE;
Mario Balenovic, Waalre, NL;
Jan Harmsen, Simpelveld, NL;
Robert Ukropec, Aachen, DE;
Brendan Patrick Carberry, Aachen, DE;
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Embodiments for reducing ammonia slip are provided. In one example, a method for reduction of ammonia emissions from an engine exhaust gas aftertreatment device with an SCR catalyst comprises determining a concentration of NOx and/or ammonia in the exhaust gas aftertreatment device, comparing a determined value of NOx and/or ammonia concentration with a nominal value for NOx and ammonia, respectively, and if an actual or shortly forecasted ammonia concentration is above the respective nominal value, triggering engine conditions with higher exhaust NOx concentration. In this way, ammonia slip may be reduced without degrading fuel economy.