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:
Jun. 23, 2015
Filed:
Sep. 09, 2010
Ryota Onoe, Susono, JP;
Junichi Suzuki, Susono, JP;
Takahiko Fujiwara, Susono, JP;
Makoto Tomimatsu, Susono, JP;
Ryota Onoe, Susono, JP;
Junichi Suzuki, Susono, JP;
Takahiko Fujiwara, Susono, JP;
Makoto Tomimatsu, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
An air-fuel ratio control apparatus of the present invention comprises an inverse direction spike introducing section and an inverse direction spike interval setting section. The inverse direction spike introducing section introduces, while an air-fuel ratio correction required by an output of a downstream air-fuel ratio sensor is being carried out, an inverse direction spike which is an air-fuel ratio spike to temporarily change an air-fuel ratio of an exhaust gas toward a direction opposite to a direction of the air-fuel ratio correction with respect to a target control air-fuel ratio. The inverse direction spike interval setting section sets, based on an operating state of an internal combustion engine system, an inverse direction spike interval which is an interval between two of the inverse direction spikes next to each other in time.