Title:
CONTROL DEVICE AND DIAGNOSIS METHOD FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/012713
Kind Code:
A1
Abstract:
The control device and diagnosis method for an internal combustion engine according to the present invention are applied to an internal combustion engine in which a first fuel injection valve and a second fuel injection valve are disposed in a first cylinder, and when an abnormality occurs in which the air-fuel ratio of the internal combustion engine is richer than a set value, the abnormal fuel injection valve between the first fuel injection valve and the second fuel injection valve is specified on the basis of a change in the air-fuel ratio when first injection control is carried out to change the ratio of the fuel injection amount allocated to the first fuel injection valve and the second fuel injection valve, and the air-fuel ratio when second injection control is carried out to inject fuel with the ratio at a prescribed ratio.
Inventors:
TOYAMA YUICHI (JP)
MURAI ATSUSHI (JP)
MURAI ATSUSHI (JP)
Application Number:
PCT/JP2019/010000
Publication Date:
January 16, 2020
Filing Date:
March 12, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02D41/22; F02D41/34
Foreign References:
| JP2009180171A | 2009-08-13 | |||
| US20180051647A1 | 2018-02-22 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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