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. 09, 2014
Filed:
Dec. 09, 2009
Wataru Koizumi, Tokyo, JP;
Hironori Narita, Tokyo, JP;
Jinichi Minamikawa, Tokyo, JP;
Hino Motors, Ltd., Tokyo, JP;
Abstract
Provided is a method of diagnosing regeneration failure of an exhaust emission control device including filter regenerating means for forcibly heating a particulate filterso as to burn off captured particulates. An exhaust flow rate to the particulate filterand a differential pressure between entry and exit sides of the particulate filterare obtained to calculate a gradient of change in the differential pressure relative to change in the exhaust flow rate. The calculated gradient is compared with a predetermined reference gradient to diagnose the particulate filteras having regeneration failure when the calculated gradient exceeds the reference gradient.