Title:
CONTROL DEVICE AND CONTROL METHOD OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2023097777
Kind Code:
A
Abstract:
To suppress generation of torque more than necessary while suppressing instability in combustion of main injection by utilizing evaporative latent heat of water injected to a combustion chamber, in enriching an air-fuel ratio of an exhaust gas by using post injection.SOLUTION: In recovering NOx storage capacity of an NSR catalyst 56, post injection is performed from a fuel injection valve 15 to enrich an air-fuel ratio of an exhaust gas. Water is injected from a water injection valve 18 between main injection and the post injection, so that a temperature (in-cylinder temperature) of a combustion chamber 14 in main combustion is lowered to reduce an output torque. Thus, generation of torque more than necessary can be suppressed without reducing a main injection amount to a degree that the combustion becomes instable.SELECTED DRAWING: Figure 1
Inventors:
KAWAI KIN
NONOMURA HITOSHI
NONOMURA HITOSHI
Application Number:
JP2021214061A
Publication Date:
July 10, 2023
Filing Date:
December 28, 2021
Export Citation:
Assignee:
TOYOTA IND CORP
International Classes:
F02D19/12; F01N3/08; F01N3/18; F02D21/08; F02D41/04; F02D41/40; F02D43/00; F02M25/025; F02M26/05
Attorney, Agent or Firm:
Patent Attorney Fukami Patent Office