Adsorption unit and absorption muffler of an intake manifold of an internal combustion engine

An absorption muffler for combustion gas of an internal combustion engine for muffling intake noise when taking in the combustion gas, wherein the absorption muffler is configured to be arranged in an intake conduit of an intake manifold, the absorption muffler comprising:

• a muffler element of a sound-absorbing medium comprising gas-permeable nonwoven or an open-pore foam;
• wherein said adsorption muffler forms at least a portion of the intake conduit of the intake manifold of the internal combustion engine;
• wherein the sound-adsorbing medium is a hollow body and encloses an interior of said muffler element;
• wherein said hollow body has opposed open ends and a main flow passage of the combustion gas extends through said hollow body and the combustion gas flows in a main flow direction through said hollow body;
• wherein said sound-absorbing medium is at least partially formed of an adsorption medium for adsorption of products of incomplete combustion;
• an adsorption housing having a chamber section with an inner wall;
• an adsorption element disposed in said adsorption housing;
• said adsorption element comprised of a gas-permeable adsorption medium;
• wherein the gas-permeable adsorption medium is a gas-permeable flat medium that is coated with or has embedded therein a hydrocarbon adsorption material selected from the group active carbon or zeolites;
• wherein the gas-permeable flat medium is an axially extending hollow body radially enclosing an interior of said adsorption element;
• wherein said hollow body has axially opposed open ends and a main flow passage of the combustion gas extends through said hollow body and the combustion gas flows in a main flow direction through said hollow body;
• wherein said adsorption element includes an exterior circumferential side facing away from said interior;
• wherein said exterior circumferential side and said inner wall of said chamber section delimit a bypass chamber surrounding said absorption element outwardly in a radial direction;
• wherein said bypass chamber includes a downstream end in said main flow direction and said downstream end is closed off;
• wherein said bypass chamber includes an upstream end in said main flow direction;
• wherein said upstream end has at least one bypass opening that communicates with said main flow passage;
• a hollow support body including:
• an axially elongated support pipe extending axially through said interior of said adsorption element, the support pipe having two opposing open axial ends;
• a radially extending annular disk arranged on and circumferentially encircling a radially outer side of said axially elongated support pipe;
• wherein said support pipe extends through and axially outwardly beyond said radially extending annular disk to the exterior of the adsorption housing;
• wherein said support pipe has a plurality of through openings extending radially through a circumferential outer wall of the support pipe at the interior of said adsorption element;
• and
• wherein the axially elongated support pipe is received into the interior of the adsorption medium.