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:
Jul. 16, 2019
Filed:
Apr. 10, 2015
Applicant:
Volvo Truck Corporation, Göteborg, SE;
Inventors:
Per-Olof Källen, Västra Frölunda, SE;
Henrik Nilsson, Askim, SE;
Assignee:
Volvo Truck Corporation, Göteborg, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); F01N 9/00 (2006.01);
U.S. Cl.
CPC ...
F01N 3/208 (2013.01); F01N 3/2066 (2013.01); F01N 3/2073 (2013.01); F01N 9/00 (2013.01); F01N 2570/14 (2013.01); F01N 2610/02 (2013.01); F01N 2610/146 (2013.01); F01N 2900/08 (2013.01); F01N 2900/14 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1622 (2013.01); F01N 2900/1812 (2013.01); F01N 2900/1821 (2013.01); Y02A 50/2325 (2018.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract
A method is provided for controlling the injection, by a reductant injector in an exhaust system for an internal combustion engine, of reductant for an exhaust aftertreatment unit of the exhaust system, for example a selective catalytic reduction (SCR) unit. The method includes determining a reductant injection debt in dependence on a reductant flow according to at least a first request being higher than a threshold of the reductant flow, and, at least partly in dependence on the reductant injection debt, controlling the reductant injector so as to inject a compensation flow.