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:
Aug. 02, 2011
Filed:
May. 21, 2008
Hiroshi Enomoto, Toyota, JP;
Atsushi Morikawa, Toyota, JP;
Hiroshi Enomoto, Toyota, JP;
Atsushi Morikawa, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
An electronic control unitdetermines whether the ambient air in the vicinity of an oxygen concentration sensorin an exhaust passagehas become equal to the atmospheric state as a fuel cut-off operation is executed. If the ambient air in the vicinity of the oxygen concentration sensoris equal to the atmospheric state, the electronic control unitexecutes a learning process, in which a detection value C of the oxygen concentration sensoris stored as a learned value Cstd in a memory. The electronic control unitcontinues the learning process until a predetermined time period set based on an exhaust gas transport delay elapses from when the fuel cut-off operation is terminated.