Title:
INTERNAL COMBUSTION ENGINE CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/229873
Kind Code:
A1
Abstract:
The purpose of the present invention is to maintain high catalyst purification efficiency and prevent deterioration in emission performance. One embodiment of the present invention comprises: a downstream equivalence ratio calculation unit that calculates a catalyst-downstream exhaust gas equivalence ratio using a catalyst statistical model into which at least a detection value of an air-fuel ratio sensor upstream of the catalyst is input and which outputs a catalyst-downstream exhaust gas equivalence ratio; an oxygen output calculation unit that calculates an output value of an oxygen sensor using an oxygen sensor statistical model into which the catalyst-downstream exhaust gas equivalence ratio is input and which outputs an output value of the oxygen sensor downstream of the catalyst; a downstream equivalence ratio correction unit that corrects the catalyst-downstream exhaust gas equivalence ratio calculated by the downstream equivalence ratio calculation unit, on the basis of a result of the calculation by the oxygen output calculation unit and the detection value from the oxygen sensor; and an air-fuel ratio control unit that controls the air-fuel ratio of a gas mixture in an internal combustion engine on the basis of the corrected catalyst-downstream exhaust gas equivalence ratio and an air-fuel ratio target value.
Inventors:
SUZUKI KUNIHIKO (JP)
Application Number:
PCT/JP2021/004250
Publication Date:
November 18, 2021
Filing Date:
February 05, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F02D41/14; F02D41/26
Domestic Patent References:
| WO2020189080A1 | 2020-09-24 |
Foreign References:
| JP2002349325A | 2002-12-04 | |||
| JP2006329005A | 2006-12-07 | |||
| JP2007292014A | 2007-11-08 | |||
| JPH1193740A | 1999-04-06 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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