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:
Sep. 20, 2011
Filed:
Jul. 20, 2007
Takahiro Oba, Susono, JP;
Katsushi Takimoto, Susono, JP;
Akihiko Negami, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An object of the present invention is to recover the performance of an exhaust gas purification apparatus while suppressing slipping of fuel through the exhaust gas purification apparatus. When the performance of the exhaust gas purification apparatus is to be recovered at a time when the intake air quantity of the internal combustion engine is increasing (S, S), an upper limit value is set for the quantity of fuel added through a fuel addition valve provided in the exhaust passage (S). If a target fuel supply quantity to be supplied to the exhaust gas purification apparatus is larger than the upper limit value (S), a quantity of fuel quantity equal to the upper limit value is added through the fuel addition valve, and the shortfall of fuel supply is injected by sub fuel injection in the internal combustion engine (S, S, S).