| 摘要 |
An exhaust treatment system arranged for treatment of an exhaust stream, is presented. According to the present invention the exhaust treatment system comprises: - a first oxidation catalyst, arranged to oxidise compounds comprising one or more of nitrogen, carbon, and hydrogen in the exhaust stream; - a first dosage device arranged to supply a first additive into the exhaust stream; - a catalytic filter, consisting of a particulate filter with an at least partly catalytic coating with reduction characteristics, and which is arranged for catching and oxidising soot particles and for a first reduction of an amount of nitrogen oxides NOx in the exhaust stream with the use of the first additive; - a second oxidation catalyst, arranged to oxidise one or more of nitrogen oxide NO and incompletely oxidised carbon compounds in the exhaust stream; - a second dosage device arranged to supply a second additive into the exhaust stream; and - a reduction catalyst device, arranged for a second reduction of nitrogen oxides N0X in the exhaust stream, with the use of at least one of the first and second additives. |
