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. 24, 2012
Filed:
Mar. 04, 2009
Kazuo Kojima, Nagoya, JP;
Takahiro Ono, Nagoya, JP;
Kazuo Kojima, Nagoya, JP;
Takahiro Ono, Nagoya, JP;
DENSO Corporation, Kariya, JP;
Abstract
The present invention provides, as one aspect, an exhaust gas purifying apparatus for an internal combustion engine including a setting unit that sets commanded values of an amount and a period of injection from an additive fuel injector, an adding controlling unit that injects fuel from the additive fuel injector in accordance with the commanded values, a determining unit that determines whether a high-accuracy measurement state has been entered in which a difference between measurement values of first and second air-to-fuel ratio sensors is within a predetermined range, and a calculating unit that calculates, when the high-accuracy measurement state has been entered, a deviation between the commanded value and a true value of the amount of injection by the adding controlling unit as a correction value, from at least one of the measurement values of the first and second air-to-fuel ratio sensors.