Patent ID: 7712307

Claim:
An exhaust gas system ( 1 ), for an internal combustion engine ( 2 ), including: a nitrogen oxide reducing converter ( 5 ) in the form of an SCR converter for the Selective Catalystic Reduction of nitrogen oxides by means of ammonia arranged in an exhaust gas line ( 4 ) of the internal combustion engine ( 2 ), an exhaust gas cleaning device ( 6 ) arranged in the exhaust gas line ( 4 ) upstream of the nitrogen oxide reducing converter ( 5 ), a bypass line ( 11 ) branching off from the exhaust gas line ( 4 ) at a branching-off point ( 9 ) upstream of the exhaust gas cleaning device ( 6 ), and rejoining the exhaust gas line ( 4 ) at an entry point ( 10 ) downstream of the exhaust gas cleaning device ( 6 ) and upstream of the nitrogen oxide reducing converter ( 5 ), and a reducing agent feed device ( 12 ) arranged in the bypass line ( 11 ) near the branching off point ( 9 ) for feeding a reducing agent consisting of an ammonia-releasing liquid into the exhaust gas of the internal combustion engine ( 2 ) at the up-stream end of the bypass line ( 11 ) so as to provide sufficient time for the release of the ammonia from the ammonia releasing liquid into the exhaust gas within the bypass line ( 11 ).