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

A method for building an exhaust gas treatment assembly which includes a housing defining a longitudinal axis (L) and said housing being elongated along said longitudinal axis (L);

• a first exhaust gas treatment unit inserted into said housing;
• said first exhaust gas treatment unit including a first casing and at least one first exhaust gas treatment element carried in said first casing;
• a second exhaust gas treatment unit inserted into said housing;
• said second exhaust gas treatment unit including a second casing and at least one second exhaust gas treatment element carried in said second casing;
• a locking arrangement configured to lock said first exhaust gas treatment unit in a locked state in said housing at least against movement along said longitudinal axis (L);
• and, said locking arrangement being further configured to be blocked in said locked state by said second exhaust gas treatment unit when said first exhaust gas treatment unit and said second exhaust gas treatment unit are inserted into said housing, the method comprising the steps of:
• providing the housing, the first exhaust gas treatment unit and the second exhaust gas treatment unit as separate components;
• inserting the first exhaust gas treatment unit in the housing such that the locking arrangement enters or can be brought into the locked state;
• and,
• inserting the second exhaust gas treatment unit into the housing such that the locking arrangement is blocked in the locked state by the second exhaust gas treatment unit.

An exhaust gas system for an internal combustion engine including an internal combustion engine for a vehicle, said exhaust gas system comprising:

• at least one exhaust gas treatment assembly including:
• a housing defining a longitudinal axis (L) and said housing being elongated along said longitudinal axis (L);
• a first exhaust gas treatment unit inserted into said housing;
• said first exhaust gas treatment unit including a first casing and at least one first exhaust gas treatment element carried in said first casing;
• a second exhaust gas treatment unit inserted into said housing;
• said second exhaust gas treatment unit including a second casing and at least one second exhaust gas treatment element carried in said second casing;
• a locking arrangement configured to lock said first exhaust gas treatment unit in a locked state in said housing at least against movement along said longitudinal axis (L);
• and,
• said locking arrangement being further configured to be blocked in said locked state by said second exhaust gas treatment unit when said first exhaust gas treatment unit and said second exhaust gas treatment unit are inserted into said housing.