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:
Jul. 08, 2025
Filed:
Aug. 03, 2023
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Junpei Shouji, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A filter abnormality determination system includes: an internal combustion engine having a plurality of cylinders; an exhaust passage connected to the internal combustion engine; a filter provided in the exhaust passage and opposed to the filter and outputting a detection value corresponding to an oxygen concentration in the exhaust gas; and a determination device, wherein the determination device includes a control unit that executes an imbalance control for controlling an air-fuel ratio of one of the plurality of cylinders to a value different from an air-fuel ratio of another of the plurality of cylinders; and a determination unit for determining whether the filter is abnormal based on a detection value of the sensor corresponding to an air-fuel ratio of an exhaust gas of the one cylinder during execution of the imbalance control.