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:
Jan. 03, 2012
Filed:
Oct. 16, 2006
Takanori Ueda, Susono, JP;
Tomihisa Oda, Numazu, JP;
Kuniaki Niimi, Susono, JP;
Kenichi Tsujimoto, Susono, JP;
Takanori Ueda, Susono, JP;
Tomihisa Oda, Numazu, JP;
Kuniaki Niimi, Susono, JP;
Kenichi Tsujimoto, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust gas purifying system for an internal combustion engine includes a first exhaust passage () and a second exhaust passage () into which an exhaust passage () of the internal combustion engine is bifurcated. NOx storage reduction catalysts () and particulate filters () are provided in each of the exhaust passages (). Fuel is supplied from a fuel valve () when NOx is to be released from the NOx storage reduction catalysts (). At a timing when the supplied fuel attaches to the NOx storage reduction catalysts (), one of exhaust control valves, for example, a first exhaust control valve () is temporarily closed so as to keep the air-fuel ratio of exhaust gas rich. When NOx is released from the NOx storage reduction catalysts () next time, a second exhaust control valve () is temporarily closed after the fuel is supplied.