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:
May. 06, 2014
Filed:
Dec. 22, 2011
Yuuichi Katou, Susono, JP;
Tomohiro Shinagawa, Shizuoka-ken, JP;
Yuuichi Katou, Susono, JP;
Tomohiro Shinagawa, Shizuoka-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
With a control apparatus of a multiple cylinder internal combustion engine, external EGR that circulates exhaust gas in an exhaust passage to an intake passage is executed, and an air-fuel ratio is feedback-controlled such that an air-fuel ratio of the exhaust gas comes to match a predetermined target air-fuel ratio. When a rich deviation in which the air-fuel ratio of a portion of cylinders is off to a rich side from the target air-fuel ratio is detected, a parameter indicative of an amount of the rich deviation is calculated. The target air-fuel ratio is corrected to the rich side according to the calculated parameter. A value of a parameter at which the rich correction is started is changed according to whether external EGR is being executed.