公开(公告)号：US20230054131A1

公开(公告)日：2023-02-23

申请号：US17792515

申请日：2021-01-22

Applicant: Hitachi Astemo, Ltd.

Inventor： Yoshihiro SUKEGAWA ,  Shinya SATO ,  Masayuki SARUWATARI ,  Atsushi SHIMADA

IPC: F02D41/00

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 device 12 includes a rotational speed calculation unit 122a that calculates a crank rotational speed of an internal combustion engine, an extreme value timing calculation unit 122b that calculates an extreme value timing at which the crank rotational speed calculated by the rotational speed calculation unit 122a becomes an extreme value, a combustion-state-calculation-means selection unit 122c that 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 unit 122d that 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 122c.