Mixer device

An exhaust system comprising:

• an exhaust gas guide component;
• and
• a mixer device carried at the exhaust gas guide component, the mixer device comprising:
• a bottom element with a rear side to be positioned facing away from an exhaust gas stream in the exhaust system and with a front side to be positioned facing the exhaust gas stream, the bottom element forming a reactant introduction opening that is open to a reactant receiving volume formed in the bottom element on the front side thereof such as to expand radially in a direction of an opening axis on the front side of the bottom element starting from the reactant introduction opening, the bottom element having a plurality of exhaust gas passage ducts arranged following one another in a circumferential direction about the opening axis and open to the reactant receiving volume, the exhaust gas passage ducts comprising axially open, groove shape recesses provided on the front side of the bottom element such as to be spaced in the circumferential direction by material areas of the bottom element defining the radially expanding structure of the reactant receiving volume in the bottom element;
• and
• a swirl generation element connected to the bottom element and having a ring shape configuration enclosing the opening axis, the swirl generation element forming a mixing volume adjoining the reactant receiving volume in the direction of the opening axis and the swirl generation element having a plurality of exhaust gas passage openings following one another in the circumferential direction about the opening axis;
• and
• a reactant introduction device arranged on the rear side of the bottom element.

A mixer device for an exhaust system of an internal combustion engine, the mixer device comprising:

• a bottom element with a rear side arranged away from an exhaust gas stream in the exhaust system, and with a front side arranged facing the exhaust gas stream, said bottom element defining a reactant introduction opening, said front side defining a reactant receiving volume having a radially expanding shape about an opening axis, and starting from the reactant introduction opening in a direction from said rear side to said front side, the bottom element defining a plurality of exhaust gas passage ducts, each of said plurality of exhaust gas passage ducts being arranged one after the other in a circumferential direction about said opening axis and extending from a radial outside of said bottom element to said reactant receiving volume, said each exhaust gas passage duct having an open groove shape recess defined by said front side of the bottom element, each said open groove shaped recess being open in a direction of said opening axis, said each open groove shaped recess being spaced in said circumferential direction;
• and
• a swirl generation element connected to said bottom element and having a ring shape configuration enclosing said opening axis, said swirl generation element defining a mixing volume adjoining said reactant receiving volume in said direction of said opening axis, said swirl generation element having a plurality of exhaust gas passage openings following one another in said circumferential direction about said opening axis.