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:
Sep. 15, 2026
Filed:
Aug. 18, 2025
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Yuji Yamaguchi, Gotemba, JP;
Taisuke Yoshida, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
An internal combustion engine system is configured to execute feedback processing of performing feedback control of an air-fuel ratio such that exhaust gas exhausted from an internal combustion engine reaches a target air-fuel ratio, target air-fuel ratio switching processing of alternately switching the target air-fuel ratio between lean and rich setting values, parameter calculation processing of calculating a gas impingement parameter indicating a degree of gas impingement to which unclean gas in the exhaust gas exhausted from a first exhaust gas cleaning catalyst impinges on a second air-fuel ratio sensor downstream of the first exhaust gas cleaning catalyst, based on an operating condition of the internal combustion engine, and switching cycle change processing of lengthening a switching cycle of the target air-fuel ratio in the target air-fuel ratio switching processing as the gas impingement parameter is a value indicating that the degree of gas impingement is high.