Title:
排気処理システム
Document Type and Number:
Japanese Patent JP7302541
Kind Code:
B2
Abstract:
To provide an exhaust treatment system which accurately determines deterioration of an exhaust treatment device for cleaning exhaust and deterioration of a fuel addition device for adding fuel to the exhaust treatment device.SOLUTION: ECU practices treatment including a step S102 of setting respective target values of a DOC temperature rise margin and a filter temperature rise margin when learning conditions are satisfied (YES in S100), a step S104 of practicing a third ejection control, steps S106, S108 and S110 of calculating a DOC deterioration quantity, a filter deterioration quantity and a first learning value, a step S114 of performing fuel addition by means of a fuel addition device when exhaust temperature becomes constant (YES in S112), a step S116 of calculating a second learning value, a step S120 of lighting a maintenance lamp of an exhaust treatment device when the first learning value is a threshold or more (YES in S118) and a step S124 of lighting a maintenance lamp of the fuel addition device when the second learning value is a threshold or more (YES in S122).SELECTED DRAWING: Figure 9
Inventors:
Takayuki Kitano
Application Number:
JP2020123636A
Publication Date:
July 04, 2023
Filing Date:
July 20, 2020
Export Citation:
Assignee:
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
International Classes:
F01N3/18; B01D53/90; B01D53/94; F01N3/025; F01N3/20; F01N3/24; F01N11/00; F02D41/34
Domestic Patent References:
| JP2009228589A | ||||
| JP2011132906A |
Attorney, Agent or Firm:
Patent Attorney Fukami Patent Office
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