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:
May. 18, 2021
Filed:
Mar. 04, 2019
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Shinichi Nakagoshi, Miyoshi, JP;
Hiromasa Hashimoto, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
Abstract
An exhaust gas purification apparatus for an internal combustion engine includes a particulate filter, an air fuel ratio sensor to detect an air fuel ratio of exhaust gas at the downstream side of the filter, and a controller configured to: change an air fuel ratio, determine whether an amount of particulate matter (PM) deposited in an interior of a partition wall of the filter is equal to or smaller than a predetermined amount, and estimate a maximum storable oxygen amount of the catalyst from a change of the air fuel ratio of exhaust gas at the time when the air fuel ratio of the exhaust gas is changed, in cases where the amount of PM deposited in the interior of the partition wall of the filter is equal to or smaller than the predetermined amount.