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:
Feb. 13, 2024
Filed:
May. 11, 2023
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Keiichiro Aoki, Sunto-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A control device for an internal combustion engine includes an electronic control unit that controls the air-fuel ratio of incoming exhaust gas flowing into a catalyst. The electronic control unit performs oxygen amount variation control in which a target air-fuel ratio for the incoming exhaust gas is switched between a rich set air-fuel ratio and a lean set air-fuel ratio. The electronic control unit switches the target air-fuel ratio to the rich set air-fuel ratio when an air-fuel ratio detected by an air-fuel ratio sensor is equal to or higher than a predetermined oxygen saturation determination air-fuel ratio. The oxygen saturation determination air-fuel ratio is leaner than an oxygen depletion determination air-fuel ratio and richer than the stoichiometric air-fuel ratio.