Noise suppressor apparatus for a gas duct
AssigneeMann+Hummel GmbH
InventorAndreas Graefenstein
Life of this patent
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Abstract
A sound damping device (4) for a tubular duct (2), particularly a gas transporting tract of an internal combustion engine (1) having a least one bypass channel (5) running parallel to a main duct (6) in a section of the duct (2). The bypass channel (5) is longer than the main duct (6) between a branching off point (7) and a re-entry inlet (8). The bypass duct according to the invention is configured as a spiral duct (5) which winds around the centrally disposed main duct (6) in order to decrease the installation space requirements for the noise suppressor (4).
Claims14
A noise suppressor for a gas-carrying duct, comprising a main, channel and at least one bypass channel connected in parallel with said main channel between a branching off point and a main channel re-entry point;
- said at least one bypass channel being longer than said main channel between said branching off point and said re-entry point;
- and wherein said at least one bypass channel is configured as a spiral channel coiled in a helix around the main channel, wherein the main channel is formed by a central pipe with the spiral channels arranged adjacent the outside surface of said central pipe, wherein the spiral channels are defined by half-shells welded to the central pipe.
Dependencies are inferred from the claim text.