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:
Dec. 15, 2015
Filed:
May. 29, 2012
Kazuki Iwatani, Susono, JP;
Kazuki Iwatani, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
An object is to reduce the increase in the fuel consumption or the increase in emissions caused by processing for raising the temperature of an NOcatalyst in an exhaust gas purification apparatus for an internal combustion engine having the NOcatalyst arranged in an exhaust passage of the internal combustion engine. To achieve the above object, an exhaust gas purification apparatus for an internal combustion engine according to the present invention executes processing for raising the temperature of the NOcatalyst on condition that a temperature change ratio with a predetermined amount of assumed temperature rise of the NOcatalyst is equal to or higher than a reference value. According to the present invention, it is possible to activate the NOquickly while keeping the unwanted increase in the fuel consumption and emissions caused by the temperature raising processing small.