| 摘要 |
The system has an oxidation catalyst (4) arranged in a part of exhaust gas stream, which converts a part of the nitrogen monoxide in nitrogen dioxide contained in exhaust gas stream. The reducing agent downstream of supply area is a material that separate hot exhaust gas ammonia or the reducing agent is ammonia. A selective catalytic reduction (SCR) catalytic converter (6) is arranged downward to particle separator (5) or particle filter, which reduces the nitrogen oxide in the exhaust gas to nitrogen and water with the help of separated ammonia in selective catalytic reduction. A particle separator or particle filter is arranged in the exhaust gas stream downward to the oxidation catalyst and downward to the supply area of the reducing agent. The soot particle is converted in carbon monoxide, carbon dioxide, nitrogen and nitrogen monoxide with the help of nitrogen dioxide, attached in particle separator or particle filter. |
