Title:
排気浄化システム
Document Type and Number:
Japanese Patent JP6455246
Kind Code:
B2
Abstract:
The present invention is provided with: a NOx occlusion/reduction catalyst 32 which is provided to an exhaust passage 13 of an internal combustion engine 10, occludes NOx in exhaust when in the exhaust is in a lean state, and reduces and purifies occluded NOx when the exhaust is in a rich state; a NOx purging control unit 60 which, when the exhaust is in the rich state, executes NOx purging in which the NOx occluded in the NOx occlusion/reduction catalyst 32 is reduced and purified; and a NOx-purging-prohibition processing unit 70 which, in cases when at least one of a plurality of prohibition conditions is fulfilled, prohibits execution of catalyst regeneration processing by the NOx purging control unit 60 even if a catalyst-regeneration-processing start request has been issued, and, in cases when a specific prohibition condition, i.e. one of the plurality of prohibition conditions, is fulfilled during execution of the catalyst regeneration processing, invalidates the prohibition condition and allows execution of the catalyst regeneration processing by the NOx purging control unit 60 to continue.
Inventors:
Teruo Nakata
Takayuki Sakamoto
Daiji Nagaoka
Hiroyuki Yuza
Takayuki Sakamoto
Daiji Nagaoka
Hiroyuki Yuza
Application Number:
JP2015048307A
Publication Date:
January 23, 2019
Filing Date:
March 11, 2015
Export Citation:
Assignee:
Isuzu Motors Limited
International Classes:
F01N3/24; B01D53/94; B01D53/96; F01N3/08; F01N3/20; F02D41/04
Domestic Patent References:
| JP2004308525A | ||||
| JP2012214059A | ||||
| JP2007107474A |
Attorney, Agent or Firm:
Akio Ikeda