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:
Oct. 02, 2012
Filed:
Dec. 21, 2007
Applicants:
Kenji Katoh, Suntou-gun, JP;
Kei Masuda, Mishima, JP;
Inventors:
Kenji Katoh, Suntou-gun, JP;
Kei Masuda, Mishima, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An exhaust gas control apparatus for an internal combustion engine, including a three-way catalyst, a NOstorage-reduction catalyst, a rich controlling mechanism performing control to make an air-fuel ratio of exhaust gas rich to reduce NOstored in the NOstorage-reduction catalyst, and a control performing control to ensure that a NOpurifying component is present in the NOstorage-reduction catalyst when reducing the NO.