Title:
EXHAUST EMISSION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2023102013
Kind Code:
A
Abstract:
To provide an exhaust emission control device capable of suppressing an impact on durability of a collection filter that might be produced when regeneration control is resumed after interruption of the regeneration control while considering an operating state of an internal combustion engine.SOLUTION: An exhaust emission control device includes: a DPF provided in an exhaust passage of an engine; a DOC provided upstream of the DPF in the exhaust passage; and an ECU executing regeneration control for removing PMs collected in the DPF by adding fuel to the DOC so that a temperature of the DPF becomes a target temperature. The ECU acquires a first target temperature that is a target temperature corresponding to an amount of PMs collected in the DPF, acquires an upstream temperature state amount that is a state amount related to thermal capacity of an exhaust gas on the upstream side of the DPF, acquires a second target temperature lower than the first target temperature on the basis of the upstream temperature state amount, and adds the fuel to the DOC by setting the second target temperature as a target temperature for a predetermined period after resumption of the regeneration control after interruption of the regeneration control.SELECTED DRAWING: Figure 4
Inventors:
SUZUKI TAKAYOSHI
Application Number:
JP2022002310A
Publication Date:
July 24, 2023
Filing Date:
January 11, 2022
Export Citation:
Assignee:
TOYOTA IND CORP
International Classes:
F01N3/025; F01N3/023; F01N3/20; F01N11/00
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Takashi Mikami
Hiromitsu Nakayama
Akifumi Shibata
Yoshiki Kuroki
Takashi Mikami
Hiromitsu Nakayama
Akifumi Shibata