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. 12, 2017
Filed:
Mar. 18, 2013
Scania Cv Ab, Södertälje, SE;
Anders Simon, Södertälje, SE;
Mikael Lundström, Hägersten, SE;
SCANIA CV AB, , SE;
Abstract
A method for cleaning an SCR system, wherein reducing agent is supplied to an exhaust flow upstream of an SCR catalyst (), NOcontents of the exhaust flow are determined upstream and downstream of the SCR catalyst () and reducing agent crystals are removed by a high-temperature procedure. The steps are determining (s) a ratio (K1) between NOcontents downstream and upstream of the SCR catalyst (), raising the temperature (s) of the exhaust flow to vaporize reducing agent crystals with a view to cleaning, determining (s) a ratio (Kn) between respective NOcontents determined downstream and upstream of the SCR catalyst () at a temperature (T2) of the SCR catalyst () at which reducing agent crystals vaporize, comparing (s) the ratios (K1, Kn) and using this comparison as a basis for deciding whether reducing agent crystals have been removed to an intended extent. Also a computer program product containing program code (P) for a computer () for implementing the method according to the invention. The invention relates also to a device and a motor vehicle equipped with the device.