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:
Jan. 30, 2018
Filed:
Dec. 07, 2012
Yuriko Hagimoto, Shizuoka-ken, JP;
Yuriko Hagimoto, Shizuoka-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
An object of the present invention is to distinguish and detect an abnormality of SCRF and an abnormality of a diffusing device in a system in which a diffusing device is provided for an exhaust gas passage between a filter (SCRF) including an SCR catalyst carried thereon and a reducing agent addition valve. In the present invention, it is judged that which one of abnormalities of any clogging-up of SCRF caused by PM, any breakage of SCRF, and any abnormality of a diffusing device occurs, on the basis of at least any one of a difference between a NOx purification rate of an SCR catalyst carried on SCRF and a predetermined NOx purification rate and a difference between a PM amount flowing out from SCRF and a predetermined outflow PM amount, when a difference, which is provided between an exhaust gas pressure difference as a difference between an exhaust gas pressure on an upstream side from a reducing agent addition valve and an exhaust gas pressure on a downstream side from SCRF and a predetermined exhaust gas pressure difference, exceeds a certain amount.