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. 16, 2024
Filed:
Jan. 22, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Yoshihiro Sukegawa, Tokyo, JP;
Shinya Sato, Ibaraki, JP;
Masayuki Saruwatari, Ibaraki, JP;
Atsushi Shimada, Tokyo, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
To accurately estimate a combustion state even in a case where the combustion state in a combustion chamber greatly changes. According to an aspect of the present invention, an internal combustion engine control deviceincludes a rotational speed calculation unitthat calculates a crank rotational speed of an internal combustion engine, an extreme value timing calculation unitthat calculates an extreme value timing at which the crank rotational speed calculated by the rotational speed calculation unitbecomes an extreme value, a combustion-state-calculation-means selection unitthat selects combustion state calculation means for calculating a combustion state in a combustion chamber based on an operation state of the internal combustion engine, and a combustion state estimation unitthat estimates the combustion state in the combustion chamber from the extreme value timing of the crank rotational speed by using the combustion state calculation means selected by the combustion-state-calculation-means selection unit