公开(公告)号：US20240240602A1

公开(公告)日：2024-07-18

申请号：US18562524

申请日：2022-02-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Hayato TAKEI ,  Shinya SATO ,  Akihiro KOMORI

IPC: F02P5/15 ,  F02D41/00

CPC classification number: F02P5/1502 ,  F02D41/009 ,  F02D2200/024 ,  F02D2200/101

Abstract: An internal combustion engine control device includes: a rotation speed calculating unit that calculates crank rotation speeds of an engine; an extreme timing calculating unit that calculates an extreme timing of the crank rotation speeds; and an average rotation speed calculating unit that calculates an average rotation speed of the crank rotation speeds; and a combustion state estimating unit that estimates a combustion state in the engine based on the extreme timing and the average rotation speed.

公开(公告)号：US20250129755A1

公开(公告)日：2025-04-24

申请号：US18834871

申请日：2022-04-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Akihiro KOMORI ,  Kunihiko SUZUKI

IPC: F02D41/30 ,  F01N3/20 ,  F01N3/22

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.

公开(公告)号：US20230250767A1

公开(公告)日：2023-08-10

申请号：US18011977

申请日：2021-06-23

Applicant: Hitachi Astemo, Ltd.

Inventor： Yuta KOIKE ,  Masayuki SARUWATARI ,  Yuusuke KIHARA ,  Akihiro KOMORI

IPC: F02D13/02 ,  F01L1/356

CPC classification number: F02D13/0238 ,  F01L1/356

Abstract: An object of the present invention is to obtain a controller device for a variable valve timing apparatus capable of controlling a phase to an arbitrary fixed valve timing from immediately before an internal combustion engine stops until after the internal combustion engine has stopped. The controller device for the variable valve timing apparatus according to the present invention performs, during engine stop processing of the internal combustion engine, normal control of changing the relative rotational phase of a camshaft to a most advanced position or a most retarded position when the rotational speed of a crankshaft is equal to or more than a first threshold, and low-speed control of fixing a current or a voltage supplied to the motor to be constant to maintain the relative rotational phase of the camshaft at the most advanced position or the most retarded position in a period from when the rotational speed of the crankshaft is lower than the first threshold until the rotational speed becomes zero.