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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.:

US 10072544 B1

PDFFull Text
Date of Patent:
Sep. 11, 2018

Filed:

Dec. 21, 2015

Deterioration diagnosis apparatus for the exhaust gas purification apparatus

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;

Inventors:

Hirotaka Saitoh, Shizuoka-ken, JP;

Koji Hagiwara, Susono, JP;

Takahiko Fujiwara, Shizuoka-ken, JP;

Toru Kidokoro, Hadano, JP;

Yasushi Iwazaki, Ebina, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;

Attorney:

Hunton Andrews Kurth LLP

Primary Examiner:

Mark Laurenzi

Assistant Examiner:

Jason Sheppard

Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 11/00 (2006.01); F02D 35/00 (2006.01); F02D 41/02 (2006.01); F02D 41/14 (2006.01); F01N 13/00 (2010.01); F02D 41/40 (2006.01);
U.S. Cl.
CPC ...
F01N 3/0842 (2013.01); F01N 3/0814 (2013.01); F01N 3/0864 (2013.01); F01N 3/0871 (2013.01); F01N 3/208 (2013.01); F01N 3/2066 (2013.01); F01N 3/2073 (2013.01); F01N 11/007 (2013.01); F02D 35/0015 (2013.01); F02D 41/0235 (2013.01); F02D 41/0295 (2013.01); F02D 41/1441 (2013.01); F02D 41/1456 (2013.01); F01N 13/009 (2014.06); F01N 2550/02 (2013.01); F01N 2900/0416 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1622 (2013.01); F01N 2900/1624 (2013.01); F02D 41/027 (2013.01); F02D 41/0275 (2013.01); F02D 41/405 (2013.01); F02D 2200/0816 (2013.01); Y02T 10/22 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract

Deterioration of a selective catalytic reduction (SCR) catalyst can be diagnosed with sufficient accuracy, by making use of a sensor for measuring an air fuel ratio of exhaust gas flowing into an exhaust gas purification apparatus, which is equipped with the SCR catalyst, and a sensor for measuring an air fuel ratio of exhaust gas flowing out from the exhaust gas purification apparatus.

Find Patent Forward Citations

Saitoh, Hirotaka. (2018). Deterioration diagnosis apparatus for the exhaust gas purification apparatus (U.S. Patent No. 10072544). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10072544

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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