Title:
An abnormality diagnosis device of an exhaust-air-purification device
Document Type and Number:
Japanese Patent JP6020372
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for an exhaust emission control device, in which the drop in diagnostic accuracy is suppressed.SOLUTION: In an abnormality diagnostic device for an exhaust emission control device for diagnosing an abnormality of an exhaust emission control device containing an SCR catalyst, a threshold value and a correction coefficient are set on the basis of an intermediate characteristic between a purification characteristic at the time when the exhaust emission control device is normal and a purification characteristic at the time when the exhaust emission control device is abnormal, and the NOpurification rate calculated by using the NOoutflow as a parameter is corrected by said correction coefficient. The abnormality diagnostic device of the exhaust emission control device compares the NOx purification rate after correction and said threshold value thereby diagnosing abnormality of the exhaust emission control device.
Inventors:
Yuji Matsumoto
Toru Kisho
Taiga Hagimoto
Kazuya Takaoka
Nishijima Yamato
Kenji Furui
Yuki Terui
Akifumi Uozumi
Toru Kisho
Taiga Hagimoto
Kazuya Takaoka
Nishijima Yamato
Kenji Furui
Yuki Terui
Akifumi Uozumi
Application Number:
JP2013138948A
Publication Date:
November 02, 2016
Filing Date:
July 02, 2013
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F01N3/18; B01D53/90; B01D53/94; F01N3/08; F01N3/20; F01N11/00
Domestic Patent References:
| JP200637770A | ||||
| JP10311213A | ||||
| JP2011220142A | ||||
| JP11117726A | ||||
| JP2010255490A |
Foreign References:
| US8245567 |
Attorney, Agent or Firm:
Yoshiyuki Kawaguchi
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita