Title:
EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2020041431
Kind Code:
A
Abstract:
To suppress a deterioration of precious metal by suppressing the local heat generation of the precious metal.SOLUTION: An exhaust emission control device for an internal combustion engine 1 includes an exhaust emission control catalyst 20 supporting precious metal and capable of storing oxygen, and a control device 31 for controlling a fuel supply amount to a combustion chamber 10. When predetermined fuel cut executing conditions are established, the control device executes fuel supply control to temporarily supply fuel to the combustion chamber so that the air-fuel ratio of exhaust gas flowing into the exhaust emission control catalyst becomes a rich air-fuel ratio richer than a theoretical air-fuel ratio, and then starts fuel cut control to stop the supply of the fuel to the combustion chamber in the state that the internal combustion engine operates.SELECTED DRAWING: Figure 4
Inventors:
UMEMOTO TOSHITAKE
Application Number:
JP2018166988A
Publication Date:
March 19, 2020
Filing Date:
September 06, 2018
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D45/00; F01N3/20; F01N3/24; F02D41/12; F02D41/22
Domestic Patent References:
| JP2001227383A | 2001-08-24 | |||
| JP2011106352A | 2011-06-02 | |||
| JP2018035796A | 2018-03-08 | |||
| JP2017057777A | 2017-03-23 | |||
| JP2016160900A | 2016-09-05 | |||
| JPH11257131A | 1999-09-21 | |||
| JP5796635B2 | 2015-10-21 | |||
| JP2009103017A | 2009-05-14 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Jun Tsuruta
Koichi Ito
Nobuo Sekine
Shinji Mitsuhashi
Jun Tsuruta
Koichi Ito
Nobuo Sekine