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. 21, 2021
Filed:
Apr. 18, 2019
Scania Cv Ab, Södertälje, SE;
Christer Lundberg, Rönninge, SE;
Scania CVAB, Södertälje, SE;
Abstract
Disclosed is a method for control of dosage of a reducing agent into an exhaust stream, which includes: determining at least one sensor signal Sfrom at least one nitrogen oxides NOsensor arranged downstream of at least one of the one or more reduction catalysts as at least one sensor correction value S, respectively, if: 1) the engine rotates without fuel supply; 2) an exhaust mass flow M'is greater than an exhaust mass flow threshold M′; M′>M′; and 3) the sensor signal Shas had a value smaller than a sensor signal threshold S; S<S; during at least a predetermined time period T; determining at least one adjusted sensor signal Sbased on the at least one sensor signal Sand the at least one sensor correction value S, respectively; and controlling the dosage of the reducing agent based on the at least one adjusted sensor signal S.