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:
Feb. 04, 2014
Filed:
Apr. 07, 2009
Hiromasa Nishioka, Susono, JP;
Takamitsu Asanuma, Mishima, JP;
Kohei Yoshida, Gotenba, JP;
Yuka Nakata, Susono, JP;
Hiromasa Nishioka, Susono, JP;
Takamitsu Asanuma, Mishima, JP;
Kohei Yoshida, Gotenba, JP;
Yuka Nakata, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
In an internal combustion engine, an SOtrap catalyst () which traps SOcontained in the exhaust gas is arranged upstream of an NOstoring catalyst () in an engine exhaust passage. When the NOstoring catalyst () should release NO, auxiliary fuel is injected into a combustion chamber () at a combustible timing after the completion of injection of fuel into the combustion chamber () for generating the engine output. At this time, the auxiliary fuel is injected so that the air-fuel ratio A/F of the combustion gas in the combustion chamber () does not become below a minimum allowable air-fuel ratio M where SOtrapped at the SOtrap catalyst () will not be released.