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. 16, 2007
Filed:
Jun. 18, 2002
Toshinari Nagai, Sunto-gun, JP;
Akihiro Katayama, Toyota, JP;
Naoto Kato, Susono, JP;
Yukio Kuroda, Susono, JP;
Yasuhiro Kuze, Susono, JP;
Hiroshi Sawada, Gotenba, JP;
Takahiro Uchida, Susono, JP;
Naoki Baba, Aichi, JP;
Shinji Kojima, Aichi, JP;
Toshinari Nagai, Sunto-gun, JP;
Akihiro Katayama, Toyota, JP;
Naoto Kato, Susono, JP;
Yukio Kuroda, Susono, JP;
Yasuhiro Kuze, Susono, JP;
Hiroshi Sawada, Gotenba, JP;
Takahiro Uchida, Susono, JP;
Naoki Baba, Aichi, JP;
Shinji Kojima, Aichi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyoto, JP;
Abstract
An air-fuel ratio control apparatus estimates, on the basis of an exhaust air-fuel ratio of exhaust gas flowing into an exhaust purifying catalyst unit disposed in an exhaust passage of an engine, an emission of at least one specific component contained in exhaust gas flowing out of the exhaust purifying catalyst unit. The air-fuel ratio control apparatus performs the estimation by use of a model, and controls the air-fuel ratio in such a manner that the estimation value reaches a target state. The model is previously determined in consideration of the mass balance of the specific component.