Title:
排気浄化装置の異常診断システム
Document Type and Number:
Japanese Patent JP6743804
Kind Code:
B2
Abstract:
When an abnormality diagnosis of an SCR catalyst is carried out, diagnostic supply control is carried out in such a manner that the first estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, becomes equal to or more than a first predetermined adsorption amount, and the second estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined normal state, becomes smaller than a second predetermined adsorption amount. Then, supply decreasing control to decrease an amount of adsorption of ammonia in the SCR catalyst is carried out, after the end of the execution of the diagnostic supply control.
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Inventors:
Ken Shirasawa
Toru Kisho
Makoto Ogiso
Kenji Furui
Toru Kisho
Makoto Ogiso
Kenji Furui
Application Number:
JP2017250032A
Publication Date:
August 19, 2020
Filing Date:
December 26, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F01N3/20; B01D53/94; F01N3/08; F01N11/00
Domestic Patent References:
| JP2013227930A | ||||
| JP2011122492A | ||||
| JP2016079852A | ||||
| JP2015197086A |
Foreign References:
| WO2018097246A1 | ||||
| US20130202506 |
Attorney, Agent or Firm:
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita
Atsushi Kokubo
Hironobu Yazawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita
Atsushi Kokubo
Hironobu Yazawa