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. 23, 2013
Filed:
Feb. 24, 2010
Hironori Narita, Tokyo, JP;
Hironori Narita, Tokyo, JP;
Hino Motors, Ltd., Hino-shi, JP;
Abstract
Disclosed is a method for detecting abnormality in a reducing agent replenished into a reducing agent tank in an exhaust emission control device for reduction and removal of NOthrough addition of the reducing agent from the tank to a selective reduction catalyst incorporated in an exhaust pipe. Replenishment of the reducing agent to the tank is detected to wait elapse of a removal-rate stabilization period, i.e., a period from the detected replenishment to stabilization of the NOremoval rate. It is determined that a dilute reducing agent or/and a different material are replenished into the tank if an abnormal lowering of a measured NOremoval rate is detected during a determination period after the removal-rate stabilization period.