发明名称 |
Exhaust gas purifying apparatus of internal combustion engine |
摘要 |
An exhaust gas purifying apparatus of an internal combustion engine is provided which includes: exhaust gas purifying means, provided in an exhaust passage of the engine, for adsorbing NO<SUB>x </SUB>in an exhaust gas when the air-fuel ratio of the exhaust gas is lean. The exhaust gas apparatus releases or reduces the adsorbed NO<SUB>x </SUB>when the oxygen concentration of the exhaust gas is reduced. A light-off catalyst is provided upstream of the exhaust gas purifying apparatus in the exhaust passage, which has a lower O<SUB>2 </SUB>storage capability than the exhaust gas purifying apparatus. There is a control device for controlling the air-fuel ratio of the exhaust gas so that an atmosphere having a reduced oxygen concentration is produced around the exhaust gas purifying apparatus when the NO<SUB>x </SUB>conversion efficiency of the exhaust gas purifying apparatus is decreased. |
申请公布号 |
US7127883(B1) |
申请公布日期 |
2006.10.31 |
申请号 |
US19980188190 |
申请日期 |
1998.11.10 |
申请人 |
MITSUBISHI JIDOSHA KOGOYO KABUSHIKI KAISHA |
发明人 |
KANEKO KATSUNORI;KOGA KAZUO;ANDO HIROMITSU |
分类号 |
F01N3/00;B01D53/94;F01N3/08;F01N3/20;F01N13/02;F02D41/02;F02D41/14;F02D41/40 |
主分类号 |
F01N3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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