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:
Apr. 23, 2019
Filed:
Feb. 27, 2015
Scania Cv Ab, Södertälje, SE;
Magnus Nilsson, Årsta, SE;
Henrik Birgersson, Stockholm, SE;
Scania CV AB, Södertälje, SE;
Abstract
A method and an exhaust treatment system are provided for treatment of an exhaust stream that comprises nitrogen oxides NO. The method comprises using a first slip-catalyst SC, arranged at a first device to create a first impact on a first amount of nitrogen oxides NOAn NO-storing catalyst may store nitrogen oxides NO. The first slip-catalyst SCmay reduce nitrogen oxides NO, and/or oxidize potential additive in the exhaust stream. This first impact is actively controlled, based on the first amount of nitrogen oxides NOreaching the first device. The method also comprises a second impact on a second amount of nitrogen oxides NOreaching a second device. The active control of the first impact may be by active control of the dosage of additive at the first device, and/or through an active control of an exhaust environment, for example, a temperature for the exhaust stream.