Exhaust gas treatment arrangement for an exhaust gas system of an internal combustion engine

An exhaust gas system for an internal combustion engine in a vehicle, the exhaust gas system comprising:

• an exhaust gas treatment arrangement including a housing defining an exhaust gas inlet for receiving an exhaust gas stream (A) of stream parts flowing therethrough and further defining an exhaust gas outlet;
• a first exhaust gas flow path leading from said exhaust gas inlet to said exhaust gas outlet;
• a second exhaust gas flow path leading from said exhaust gas inlet to said exhaust gas outlet separately from said first exhaust gas flow path;
• a flow path switching unit for changing the parts of said exhaust gas stream (A) conducted in said first exhaust gas flow path and in said second exhaust gas flow path;
• a reactant supply device for supplying reactant into said second exhaust gas flow path downstream of said exhaust gas inlet;
• and, an SCR catalyst arrangement in said second exhaust gas flow path upstream of said exhaust gas outlet;
• an exhaust gas treatment system connected to said exhaust gas outlet of said exhaust gas treatment arrangement;
• said exhaust gas treatment system including at least one exhaust gas treatment unit;
• wherein:
• said housing has an interior partitioned by a partition wall into a first volume region and a second volume region;
• said second volume region forms at least a part of said first exhaust gas flow path;
• and,
• said SCR catalyst arrangement is substantially arranged in said second volume region.

An exhaust gas treatment arrangement for an exhaust gas system of an internal combustion engine, the exhaust gas treatment arrangement comprising:

• a housing defining an exhaust gas inlet for receiving an exhaust gas stream (A) of stream parts flowing therethrough and further defining an exhaust gas outlet;
• a first exhaust gas flow path leading from said exhaust gas inlet to said exhaust gas outlet;
• a second exhaust gas flow path leading from said exhaust gas inlet to said exhaust gas outlet separately from said first exhaust gas flow path;
• a flow path switching unit for changing the parts of said exhaust gas stream (A) conducted in said first exhaust gas flow path and in said 5 second exhaust gas flow path;
• a reactant supply device for supplying reactant into said second exhaust gas flow path downstream of said exhaust gas inlet;
• an SCR catalyst arrangement in said second exhaust gas flow path upstream of said exhaust gas outlet;
• wherein:
• said housing has an interior partitioned by a partition wall into a first volume region and a second volume region;
• said second volume region forms at least a part of said first exhaust gas flow path;
• said second exhaust gas flow path includes:
• a second exhaust gas guide element arranged substantially in said first volume region;
• an exhaust gas/reactant mixing segment connected to said second exhaust gas guide element;
• a third exhaust gas guide element connected to said second exhaust gas guide element;
• a mixer arranged in said third exhaust gas guide element;
• a fourth exhaust gas guide element connected to said third exhaust gas guide element and extending substantially in said second volume region;
• a fifth exhaust gas guide element connected to said fourth exhaust gas guide element and extending substantially into said first volume region;
• a sixth exhaust gas guide element connected to said fifth exhaust gas guide element and extending substantially into said second volume region;
• and,
• a catalyst element of said SCR catalyst arrangement being contained in said sixth exhaust gas guide element.

An exhaust gas system for an internal combustion engine in a vehicle, the exhaust gas system comprising:

• an exhaust gas treatment arrangement including a housing defining an exhaust gas inlet for receiving an exhaust gas stream (A) of stream parts flowing therethrough and further defining an exhaust gas outlet;
• a first exhaust gas flow path leading from said exhaust gas inlet to said exhaust gas outlet;
• a second exhaust gas flow path leading from said exhaust gas inlet to said exhaust gas outlet separately from said first exhaust gas flow path;
• a flow path switching unit for changing the parts of said exhaust gas stream (A) conducted in said first exhaust gas flow path and in said second exhaust gas flow path;
• a reactant supply device for supplying reactant into said second exhaust gas flow path downstream of said exhaust gas inlet;
• and, an SCR catalyst arrangement in said second exhaust gas flow path upstream of said exhaust gas outlet;
• an exhaust gas treatment system connected to said exhaust gas outlet of said exhaust gas treatment arrangement;
• said exhaust gas treatment system including at least one exhaust gas treatment unit;
• wherein:
• said housing has an interior partitioned by a partition wall into a first volume region and a second volume region;
• said second volume region forms at least a part of said first exhaust gas flow path;
• said second exhaust gas flow path includes:
• a second exhaust gas guide element arranged substantially in said first volume region;
• an exhaust gas/reactant mixing segment connected to said second exhaust gas guide element;
• a third exhaust gas guide element connected to said second exhaust gas guide element;
• a mixer arranged in said third exhaust gas guide element;
• a fourth exhaust gas guide element connected to said third exhaust gas guide element and extending substantially in said second volume region;
• a fifth exhaust gas guide element connected to said fourth exhaust gas guide element and extending substantially into said first volume region;
• a sixth exhaust gas guide element connected to said fifth exhaust gas guide element and extending substantially into said second volume region;
• and,
• a catalyst element of said SCR catalyst arrangement being contained in said sixth exhaust gas guide element.