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:
Jun. 13, 2017
Filed:
May. 29, 2014
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, 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-ken, JP;
Abstract
An object of the invention is to suppress a reduction in accuracy of abnormality diagnosis with an abnormality diagnosis device for an exhaust gas control apparatus that performs the abnormality diagnosis regarding the exhaust gas control apparatus by using the amount of NOflowing into an SCR catalyst as a parameter. In the abnormality diagnosis device for an exhaust gas control apparatus according to the invention provided with an exhaust gas control apparatus including the SCR catalyst, a supply device supplying ammonia to the exhaust gas control apparatus, an EGR device allowing some of exhaust gas to flow back to an intake passage from an exhaust passage further downstream than the supply device, acquiring means for acquiring a NOinflow amount as the amount of NOflowing into the exhaust gas control apparatus, and diagnostic means for diagnosing an abnormality of the exhaust gas control apparatus by using the NOinflow amount acquired by the acquiring means as a parameter, the abnormality diagnosis regarding the exhaust gas control apparatus by the diagnostic means is prohibited in a case where the amount of the ammonia allowed to flow back along with the exhaust gas by the EGR device exceeds an upper limit value.