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:
Mar. 01, 2016
Filed:
Dec. 24, 2010
Akira Sato, Gotenba, JP;
Akira Sato, Gotenba, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
An ECU alternatively changes a target air-fuel ratio At to a rich side and a lean side by active air-fuel ratio control. The ECU measures an oxygen storage capacity OSC of an exhaust purification catalyst based on an oscillation period of the target air-fuel ratio At and the target aft-fuel ratio At, and executes a deterioration determination with respect to the exhaust purification catalyst based on the measurement value. When executing the deterioration determination, the ECU closes a waste gate valve to prevent a decrease in the accuracy of the deterioration determination that is caused by two kinds of exhaust gas whose flow paths are different from each other arriving at the area surrounding an air-fuel ratio sensor.