公开(公告)号：US20250154916A1

公开(公告)日：2025-05-15

申请号：US18838017

申请日：2023-02-06

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryo MOCHIZUKI ,  Masaki KOBAYASHI

IPC: F02D41/14 ,  F02D41/06 ,  F02D41/38

Abstract: Provided is an apparatus and a method for controlling an internal combustion engine such that emissions may not worsen during recovery from a fuel cut. An internal combustion engine control apparatus executes feedback control on the air-fuel ratio of an internal combustion engine. The control apparatus increases a supply of fuel, with the air-fuel ratio feedback stopped, when combustion restarts after a fuel cut of the internal combustion engine. The control apparatus sets the air-fuel ratio criteria based on a rich-side peak value of the air-fuel ratio obtained after the fuel supply increase starts. The control apparatus starts the air-fuel ratio feedback when the air-fuel ratio falls within the set air-fuel ratio criteria after the fuel supply increase.

公开(公告)号：US20230323804A1

公开(公告)日：2023-10-12

申请号：US18023779

申请日：2021-08-06

Applicant: Hitachi Astemo, Ltd.

Inventor： Shinichi MATSUSHITA ,  Masaki KOBAYASHI

IPC: F01N11/00 ,  F02D41/14 ,  F02D41/38 ,  F02D41/02

CPC classification number: F01N11/007 ,  F02D41/1454 ,  F02D41/38 ,  F02D41/0235 ,  F02D2200/0816 ,  F01N2550/02

Abstract: An internal combustion engine control device and a catalyst deterioration diagnostic method according to the present invention control the amount of fuel to be supplied to an internal combustion engine such that the air-fuel ratio of the exhaust on the downstream side of the exhaust purification catalyst is alternately switched between rich and lean, measure the oxygen storage capability of the exhaust purification catalyst during a measurement period within a reversal period of the air-fuel ratio, and diagnose deterioration of the exhaust purification catalyst based on a measurement value of the oxygen storage capability. A time point at which the output of an exhaust sensor indicates that the air-fuel ratio of the exhaust on the downstream side of the exhaust purification catalyst begins to change from a vicinity of a stoichiometric air-fuel ratio to rich or lean is set as the time of end of the measurement period.