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:
Nov. 11, 2025
Filed:
Apr. 15, 2022
Applicant:
Hitachi Astemo, Ltd., Hitachinaka, JP;
Inventors:
Akihiro Komori, Hitachinaka, JP;
Kunihiko Suzuki, Hitachinaka, JP;
Assignee:
Hitachi Astemo, Ltd., Hitachinaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T 7/12 (2006.01); F01N 3/20 (2006.01); F01N 3/22 (2006.01); F02D 41/30 (2006.01);
U.S. Cl.
CPC ...
F02D 41/30 (2013.01); F01N 3/20 (2013.01); F01N 3/22 (2013.01);
Abstract
An internal combustion engine control device integrates an oxygen storage amount stored in a three-way catalyst in a period from an integration start position where combustion gas of an internal combustion engine obtained from an air-fuel ratio of exhaust gas starts to change from lean to rich or from rich to lean to an integration stop position where an oxygen concentration that has increased or decreased from before the integration start position is reversed.