Title:
CATALYST DEGRADATION DETECTION DEVICE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3918706
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately determine the degradation of a catalyst despite a reference value of catalyst degradation is set high.
SOLUTION: A catalyst temperature detection unit detects the temperature of a catalyst containing Ceria (CeO2) as an oxygen occlusion agent. If the detected catalyst temperature is higher than an active temperature of the catalyst and within a specific temperature range (degradation detection temperature range) where NOx purification efficiency decreases, a degradation detection unit detects the degradation of the catalyst.
Inventors:
Kojiro Okada
Yasuki Tamura
Iwachimichi uniform
Osamu Nakayama
Yasuki Tamura
Iwachimichi uniform
Osamu Nakayama
Application Number:
JP2002292261A
Publication Date:
May 23, 2007
Filing Date:
October 04, 2002
Export Citation:
Assignee:
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
International Classes:
F01N3/20; F01N3/10; F01N11/00; F01N13/02; (IPC1-7): F01N3/20; F01N3/10
Domestic Patent References:
| JP2000237541A | ||||
| JP7225203A | ||||
| JP2002047919A |
Attorney, Agent or Firm:
Yu Sanada
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