To provide an exhaust emission control system which can improve the efficiency of catalytic activity and which can suppress a pressure loss caused by accumulation of particulates which are discharged from an internal combustion engine.
The exhaust emission control system is provided with a first purification section and a second purification section which is arranged on the downstream side of the first purification section. The first purification section has a metal honeycomb structure to which a first oxidation catalyst is carried, and the second purification section has a particulate filter to which a second oxidation catalyst is carried. The second oxidation catalyst has different carrying amounts of a catalyst between the upstream side and the downstream side of the exhaust gas path.
TAMANE YASUYUKI
| JP2006233935A | 2006-09-07 | |||
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| JP2003161138A | 2003-06-06 | |||
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| JPH0285815A | 1990-03-27 |
| WO2001002083A1 | 2001-01-11 | |||
| WO2007078826A2 | 2007-07-12 |
Ryoichi Takaoka
Hayashi Ichiyoshi
Kiyoshi Kato