Patent ID: 11891936
Assignee: PUREM GMBH
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 17:
18. 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.