Exhaust butterfly system

An exhaust butterfly system for use in at least one exhaust line of an internal combustion engine, comprising:

• an exhaust butterfly arranged in the exhaust line;
• first and second bearing journals, said first and second bearing journals rotatably holding said exhaust butterfly on two opposite sides in the exhaust line via positive plug-in connections;
• first and second bearing sleeves, said first and second bearing journals being rotatably mounted in said first and second bearing sleeves, respectively;
• an actuating device coupled to said first bearing journal;
• a spring arranged so as to preload at least the second bearing journal against said exhaust butterfly, said spring acting in a direction of a pivoting axis of said exhaust butterfly and being supported on a casing for the at least one exhaust line;
• wherein the second bearing sleeve assigned to the second bearing journal is formed in a blind hole and on the casing;
• wherein the first bearing journal is preloaded against said exhaust butterfly by a second spring acting in the direction of the pivoting axis of the exhaust butterfly and being supported on the casing;
• wherein said first and second bearing journals are movably mounted in their respective first and second bearing sleeves such that said first and second bearing journals retract completely into their respective first and second bearing sleeves counter to a force of the respective first and second springs in order to install the exhaust butterfly.