Title:
INTERNAL COMBUSTION ENGINE CONTROL DEVICE AND STATE QUANTITY ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/084654
Kind Code:
A1
Abstract:
An internal combustion engine control device comprising: an exhaust gas flow rate calculation unit; an exhaust gas temperature detection unit; a catalyst upstream state quantity estimation unit that inputs a catalyst upstream air-fuel ratio, an exhaust gas flow rate, and an exhaust gas temperature and estimates a catalyst upstream NOx discharge quantity, a catalyst upstream HC discharge quantity, and a catalyst upstream CO discharge quantity as the catalyst upstream state quantities; a catalyst downstream state quantity estimation unit that inputs the catalyst upstream air-fuel ratio, exhaust gas flow rate, exhaust gas temperature, and catalyst upstream state quantities and estimates the catalyst temperature of a three-way catalyst, an oxygen storage capacity, a catalyst downstream air-fuel ratio, a catalyst downstream NOx discharge quantity, a catalyst downstream HC discharge quantity, and a catalyst downstream CO discharge quantity as catalyst downstream state quantities; and a correction unit that corrects the catalyst downstream NOx discharge quantity, catalyst downstream HC discharge quantity, and catalyst downstream CO discharge quantity by using the NOx sensor value detected by a downstream NOx sensor.
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Inventors:
KOMORI AKIHIRO (JP)
SUZUKI KUNIHIKO (JP)
SUZUKI KUNIHIKO (JP)
Application Number:
PCT/JP2022/039104
Publication Date:
April 25, 2024
Filing Date:
October 20, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F02D45/00; F01N3/22; F01N11/00; F02D41/14
Domestic Patent References:
| WO2020189080A1 | 2020-09-24 | |||
| WO2005075803A1 | 2005-08-18 |
Foreign References:
| JP2006170004A | 2006-06-29 | |||
| JP2021071104A | 2021-05-06 | |||
| JP2022081026A | 2022-05-31 |
Attorney, Agent or Firm:
SHIN-YU INTERNATIONAL PATENT FIRM (JP)
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