Title:
ディーゼルエンジン用触媒の硫黄被毒解除制御装置
Document Type and Number:
Japanese Patent JP4241032
Kind Code:
B2
Abstract:
A NOx catalyst (10) traps nitrogen oxides in the exhaust gas of a diesel engine (40), and particulate matter is trapped by a filter (20). The sulfur poisoning of the NOx catalyst (10) is eliminated using exhaust gas corresponding to a rich air-fuel ratio. The exhaust gas composition is changed over to a lean air-fuel ratio according to an increase of a particulate matter collection amount during the elimination of sulfur poisoning so that the particulate matter collection amount in the filter (20) does not increase. As a result, when the particulate matter collection amount decreases due to combustion of collected particulate matter, elimination of sulfur poisoning again proceeds using exhaust gas corresponding to a rich air-fuel ratio.
Inventors:
Tabata Munehiro
Inoue Takao
Inoue Takao
Application Number:
JP2002377232A
Publication Date:
March 18, 2009
Filing Date:
December 26, 2002
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F01N3/20; B01D46/42; B01D53/86; B01D53/94; F01N3/02; F01N3/08; F01N3/24; F01N3/28; F01N13/08; F02D41/02; F02D41/38; F01N9/00; F02B37/00; F02M25/07
Domestic Patent References:
| JP2003113710A | ||||
| JP2002213229A | ||||
| JP10306717A | ||||
| JP2002317621A | ||||
| JP2002349237A |
Attorney, Agent or Firm:
Masaki Goto
Yoshio Matsuda
Yoshio Matsuda