| 摘要 |
The invention concerns a device for the aftertreatment of exahaust gas of an internal combustion engine of a motor vehicle with a reducing agent generating system, whereby ammonia generated from the reducing agent generating system for the reduction of nitrogen oxides can be delivered to an exhaust gas duct of the internal combustion engine in front of a SCR-catalytic converter, whereby the reducing agent generating system along a standard gas route is constructed from a nitrogen oxide production unit, an oxidation reformation unit and a combined nitrogen oxide storage/ammonia production unit and whereby source materials for the production of ammonia can at least periodically be delivered to the nitrogen oxide production unit by way of an air/exhaust gas feed and a fuel feed. If the reducing agent generating system has a valve system, with which at least a part of a gas mixture carried in a standard gas route can be delivered to a heating gas route with a heat exchanger, the hot gas mixture from the nitrogen oxide production unit and the subsequently connected oxidation reformation unit can on the one hand successfully be cooled down to a temperature, at which the nitrogen oxide storage/ammonia production unit works optimally. On the other hand, the energy of the waste heat can be used, for example, to heat the interior of the motor vehicle or the coolant circuit of the internal combustion engine.
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