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. 27, 2016
Filed:
Sep. 24, 2014
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Arifumi Matsumoto, Gotenba, JP;
Tomoyuki Kogo, Gotenba, JP;
Taiga Hagimoto, Susono, JP;
Kenji Furui, Susono, JP;
Akifumi Uozumi, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
An abnormality diagnosis apparatus for an exhaust gas purification apparatus including a selective catalytic reduction NOx catalyst (SCR catalyst) and a sensor which detects NOx and ammonia in exhaust gas flowing out from the NOx catalyst and at which NOx and ammonia react with each other. The abnormality diagnosis apparatus calculates, based on concentrations of NOx and ammonia which flow out from the SCR catalyst, an amount of decline in output of the sensor due to a reaction between NOx and ammonia at the sensor, and performs an abnormality diagnosis of the SCR catalyst based on the calculated amount of decline in output of the sensor.