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:
Jul. 16, 2019
Filed:
Feb. 09, 2015
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Hiroyuki Takita, Hiroshima, JP;
Mitsuharu Kaura, Higashihiroshima, JP;
Susumu Takano, Hiroshima, JP;
Yosuke Honda, Higashihiroshima, JP;
Hidekazu Kashiro, Hiroshima, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A method of diagnosing deterioration of an exhaust emission control catalyst is provided. The catalyst includes an HC (hydrocarbon) adsorbing part and an oxidation catalyst part. The method includes estimating that an HC discharge amount discharged from the HC adsorbing part is larger than a first value, detecting a parameter relating to a reaction heat of the exhaust emission control catalyst, and diagnosing that the exhaust emission control catalyst is deteriorated when the detected parameter indicates a temperature value lower than a predetermined threshold. The deterioration diagnosis is performed under a first condition that the HC discharge amount is estimated to be larger than the first value.