Sound Proofing Device and Device for Conducting a Fluid

Abstract

A device for muffling the sound produced by a fluid in a duct, especially the sound produced in an intake pipe of a combustion engine, comprises a wall, whose inside defines a flow passage for the fluid. The device is at least partly tubular, i.e. it has two openings. At the outside of the wall ( 3 ) is arranged a plurality of chambers ( 4 ), each of which is connected to the flow passage via an aperture ( 7 ). The chambers ( 4 ) are bounded by the outside of the wall ( 3 ) as well as by bars ( 5, 6, 8 ) formed at the outside of the wall ( 3 ). The chambers ( 4 ) function in use as Helmholtz resonators. In addition, a device for the conduction of a fluid with the sound proofing device ( 1 ) described is presented.

1 - 23 . (canceled)  
     
     
         24 . A device for muffling sound produced by a fluid in a duct, the device comprising: 
 a wall having an inside surface that defines a flow passage for the fluid; and    a plurality of chambers formed on at least one exterior surface of the device;    wherein the plurality of chambers are fluidly connected with the flow passage.    
     
     
         25 . The device as claimed in  claim 24 , wherein the at least one exterior surface comprises a plurality of apertures; and wherein each chamber of the plurality of chambers is fluidly connected with the flow passage by at least one aperture of the plurality of apertures.  
     
     
         26 . The device as claimed in  claim 25 , wherein at least some chambers of the plurality of chambers have different volumes relative to one another; and 
 wherein at least some apertures of the plurality of apertures have different relative cross-sectional areas relative to one another.    
     
     
         27 . The device as claimed in  claim 25 , wherein the plurality of chambers and the plurality of apertures are dimensioned so as to dampen a predetermined frequency range of sound.  
     
     
         28 . The device as claimed in  claim 24 , wherein each chamber of the plurality of chambers is bounded by an exterior surface of the wall and by a plurality of defining bars, the bars being formed extending from the exterior surface of the wall.  
     
     
         29 . The device as claimed in  claim 28 , wherein at least some of the plurality of defining bars are aligned substantially perpendicular to a primary flow direction of the fluid.  
     
     
         30 . The device as claimed in  claim 28 , wherein at least some of the plurality of defining bars are aligned substantially parallel to a primary flow direction of the fluid.  
     
     
         31 . The device as claimed in  claim 28 , wherein the plurality of chambers are closed on a side opposite the exterior surface of the wall.  
     
     
         32 . The device as claimed in  claim 28 , wherein at least some chambers of the plurality of chambers have an open side opposite the exterior surface of the wall.  
     
     
         33 . The device as claimed in  claim 32 , wherein the device is constructed and arranged such that when inserted into the duct, an area of an inside of an enclosing wall forming the duct covers the open side of the chambers.  
     
     
         34 . The device as claimed in  claim 24 , wherein the plurality of chambers form a plurality of Helmholtz resonators.  
     
     
         35 . The device as claimed in  claim 24 , wherein the device is formed as one piece.  
     
     
         36 . The device as claimed in  claim 24 , wherein the device comprises a thermoplastic polymer.  
     
     
         37 . The device as claimed in  claim 36 , wherein the thermoplastic polymer is selected from the group consisting of: polyphenylene sulphide, a polyamine composite material, a polypropylene composite material, and polyeurethane.  
     
     
         38 . The device as claimed in  claim 36 , wherein the thermoplastic polymer comprises a glass fiber fraction.  
     
     
         39 . The device as claimed in  claim 24 , wherein the device comprises an elastomer.  
     
     
         40 . The device as claimed in  claim 39 , wherein the elastomer comprises a thermoplastic elastomer.  
     
     
         41 . The device as claimed in  claim 24 , wherein the wall has a tubular cross-section.  
     
     
         42 . The device as claimed in  claim 24 , wherein the device is substantially flat; and wherein the wall is arranged in a plane.  
     
     
         43 . The device as claimed in  claim 42 , further comprising at least one connecting section, the at least one connecting section being constructed and arranged such that two adjacent areas of the device are adjusted to one another at an angle by the at least one connecting section.  
     
     
         44 . The device as claimed in  claim 42 , wherein the device is a flexible module.  
     
     
         45 . The device as claimed in  claim 24 , wherein the device is constructed and arranged to be inserted into a pipe from an outside of the pipe; and wherein, once the device is inserted into the pipe, at least a portion of an exterior of the device rests against an inner wall of the pipe.  
     
     
         46 . The device as claimed in  claim 45 , wherein the pipe is a curved pipe.  
     
     
         47 . The device as claimed in  claim 45 , wherein the pipe is coupled to an engine; and wherein the device comprises a connecting unit that connects the device to a connection point in the engine.  
     
     
         48 . A device for conducting fluid, the device comprising: 
 a duct; and    a sound-proofing device disposed within the duct, the soundproofing device comprising a wall having an interior surface that defines a flow passage for the fluid, and a plurality of chambers formed on at least one exterior surface of the wall, the plurality of chambers being fluidly connected with the flow passage.    
     
     
         49 . The device for conducting fluid as claimed in  claim 48 , wherein the device is constructed and arranged to supply air to a combustion engine.  
     
     
         50 . The device for conducting fluid as claimed in  claim 48 , wherein the duct comprises a bulge to accommodate the soundproofing device; and wherein the soundproofing device is disposed within the bulge.  
     
     
         51 . The device for conducting fluid as claimed in  claim 48 , wherein a flow cross-section of transition area from the duct to the flow passage of the soundproofing device is constant.  
     
     
         52 . The device for conducting fluid as claimed in  claim 48 , wherein a flow cross-section of transition area from the duct to the flow passage of the soundproofing device changes at a continuous and constant rate.