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. 01, 2014
Filed:
Jul. 22, 2010
Yasutaka Ishibashi, Yokohama, JP;
Yuuichi Hosaka, Yokohama, JP;
Takeshi Ishino, Futtsu, JP;
Issho Uehara, Yokohama, JP;
Yasutaka Ishibashi, Yokohama, JP;
Yuuichi Hosaka, Yokohama, JP;
Takeshi Ishino, Futtsu, JP;
Issho Uehara, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
An exhaust emission control device includes a first detection unit for detecting a NOx adsorption amount and an oxygen storage amount of a three-way catalyst and a NOx purification catalyst during rich spike, a second detection unit for detecting the oxygen storage amount of the three-way catalyst and the NOx purification catalyst until the output of a second air-fuel sensor becomes lean after the rich spike, and a deterioration determination unit for determining deterioration of the NOx purification catalyst based on a detected value of the first detection unit and that of the second detection unit.