Title:
内燃機関の排気ガス浄化システム
Document Type and Number:
Japanese Patent JP4304428
Kind Code:
B2
Abstract:
The exhaust gas purifying system (1) for the internal combustion engine, comprising the first exhaust gas purifying device (31) provided with the NOx occlusion reduction type catalyst arranged in the exhaust gas passage (30) of the internal combustion engine (10), and also comprising the respective oxygen concentration sensors (34, 35) arranged at the upstream and downstream of the first exhaust gas purifying device (31), and which controls to end the rich control when a difference between the oxygen concentrations detected by both of said oxygen concentration sensors (34, 35) falls not higher than a predetermined judgment value during the rich control for restoring the catalytic ability of the first exhaust gas purifying device (31), is provided with the second exhaust gas purifying device (32) for cleaning HC and CO at the downstream of said first exhaust gas purifying device (31). In such a manner, HC and CO can be prevented from being discharged into the atmospheric air at the time of ending the rich control.
Inventors:
Daiji Nagaoka
Masashi Kabe
Takayuki Sakamoto
Masashi Kabe
Takayuki Sakamoto
Application Number:
JP2003031184A
Publication Date:
July 29, 2009
Filing Date:
February 07, 2003
Export Citation:
Assignee:
Isuzu Motors Limited
International Classes:
F01N3/02; F01N3/28; B01D53/94; F01N3/023; F01N3/025; F01N3/029; F01N3/035; F01N3/08; F01N3/20; F01N3/24; F01N11/00; F02D41/04; F01N13/02; F02D41/02; F02D41/14
Domestic Patent References:
| JP2000064826A | ||||
| JP2002155737A |
Attorney, Agent or Firm:
Shinichi Ogawa
Takashi Noguchi
Kazuhiko Saishita
Takashi Noguchi
Kazuhiko Saishita