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. 15, 2015
Filed:
Dec. 23, 2011
Sören Udd, Nödinge, SE;
John Korsgren, Hisings Kärra, SE;
Sören Udd, Nödinge, SE;
John Korsgren, Hisings Kärra, SE;
Volvo Lastvagnar AB, Göteborg, SE;
Abstract
An exhaust system includes a first SCR catalyst and a second SCR catalyst positioned downstream of the first SCR catalyst. A first injector is provided upstream of the first SCR catalyst, and a second injector is provided upstream of the second SCR catalyst. The exhaust system further includes a gaseous ammonia supply device fluidly connected to the first injector for supplying gaseous ammonia to the exhaust gas by the first injector, and an ammonia-containing reductant reservoir fluidly connected to the second injector for supplying a fluid ammonia-containing reductant, such as urea, to the exhaust gas by the second injector. The first SCR catalyst has a smaller volume than the second SCR catalyst for a fast warm-up of the first SCR catalyst.