Exhaust-gas treatment arrangement

An exhaust system for an internal-combustion engine including a diesel internal-combustion engine, the exhaust system comprising:

• an exhaust-gas conduit conducting exhaust gas away from the combustion engine;
• and,
• an exhaust-gas treatment arrangement communicating with said exhaust-gas conduit and defining a flow path and said exhaust-gas treatment arrangement including:
• a first exhaust-gas treatment unit;
• an exhaust-gas treatment assembly downstream of said first exhaust-gas treatment unit;
• said first exhaust-gas treatment unit and said exhaust-gas treatment assembly being arranged axially one after the other in a direction of a longitudinal axis (L2) of said flow path with said flow path including said first exhaust-gas treatment unit and said exhaust-gas treatment assembly;
• a hydrocarbon feeding assembly for introducing hydrocarbon into exhaust gas flowing in said flow path;
• said hydrocarbon feeding assembly including a hydrocarbon-dispensing unit for dispensing hydrocarbon into said flow path downstream of said first exhaust-gas treatment unit and upstream of said exhaust-gas treatment assembly;
• a swirl-flow-generating unit arranged in said flow path upstream of said hydrocarbon-dispensing unit;
• a second exhaust-gas treatment unit arranged downstream of said exhaust-gas treatment assembly;
• and
• an exhaust-gas/reagent mixing section defining a longitudinal axis (L3) and having a mixing duct elongated substantially in a direction of said longitudinal axis (L3) of the mixing section;
• said exhaust-gas/reagent mixing section further having a reagent-dispensing unit for dispensing reagent into said mixing duct and being disposed downstream of said exhaust-gas treatment assembly and upstream of said second exhaust-gas treatment unit.