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:
May. 23, 2017
Filed:
May. 29, 2014
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Tomoyuki Kogo, Gotenba, JP;
Makoto Ogiso, Mishima, JP;
Taiga Hagimoto, Nagaizumi-cho, JP;
Arifumi Matsumoto, Gotenba, JP;
Kazuya Takaoka, Susono, JP;
Hirokazu Nishijima, Susono, JP;
Kenji Furui, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
An abnormality diagnosis apparatus includes an exhaust gas purification apparatus arranged in an exhaust passage of an internal combustion engine and including a SCR catalyst; a supply apparatus supplying an additive such as ammonia to the exhaust gas purification apparatus; an EGR apparatus recirculating a part of exhaust gas from the exhaust passage at a downstream side of a position of supplying the additive to an intake passage; obtaining means for obtaining a NOinflow amount into the exhaust gas purification apparatus; diagnosing means for calculating a physical quantity correlated to a NOpurification performance of the exhaust gas purification apparatus using the obtained NOinflow amount, and diagnosing that an abnormality has occurred in the exhaust gas purification apparatus when the physical quantity is smaller than a threshold; and correcting means for, when the additive is recirculated together with a part of the exhaust gas, correcting the threshold to a smaller value than when otherwise.