Silencer

Patent metadata

Field	Value
Publication number	US-2016195049-A1
Application number	US-201414910682-A
Country	US
Kind code	A1
Filing date	Aug 7, 2014
Priority date	Aug 8, 2013
Publication date	Jul 7, 2016
Grant date	—

Abstract

A silencer, for example an intake silencer for an internal combustion engine, may include a pipe for conducting a gas mixture. The pipe may be perforated at least in some regions. An absorption layer may at least partially surround the pipe for absorbing a sound transmitted by the gas mixture. An outer casing may encase the pipe. The outer casing may be perforated at least in some regions and may surround the absorption layer.

First claim

1 . A production method for a silencer, comprising:
providing a first half shell and a second half shell, wherein at least one of the first half shell and the second half shell is perforated at least in some regions, joining the first half shell and the second half shell together to form an outer casing in such a manner that the first half shell and the second half shell enclose a pipe, wherein the pipe is perforated at least in some regions and is arranged between the first half shell and the second half shell, and pressing a porous sound-absorbing material between the pipe and at least one of the first half shell and the second half shell to form an absorption layer.

2 . A silencer, comprising:
a pipe for conducting a gas mixture, wherein the pipe is perforated at least in some regions, an absorption layer at least partially surrounding the pipe for absorbing a sound transmitted by the gas mixture, and an outer casing encasing the pipe, wherein the outer casing is perforated at least in some regions and surrounds the absorption layer.

3 . The silencer according to claim 2 , wherein the absorption layer is composed of a material capable of substantially completely absorbing the sound in a high frequency range.

4 . The silencer according to claim 2 , wherein the pipe is perforated in configuration facilitating a change in a buildup of resonant frequencies and a reduction of an outlet sound in low frequency ranges.

5 . The silencer according to claim 2 , wherein the absorption layer is composed in such a manner and the pipe is perforated in such a manner that a low frequency range and a high frequency range supplement one another so as to form a wide frequency band that comprises the audible sound.

6 . The silencer according to claim 2 , further comprising a fluidic connector for connecting an acoustic resonator to the pipe.

7 . The silencer according to claim 6 , wherein the fluidic connector has a hollow-cylindrical connecting element.

8 . The silencer according to claim 7 , wherein the connecting element has an axis that extends substantially perpendicular to a flow direction of the gas mixture in the pipe.

9 . The silencer according to claim 7 , wherein the connecting element is a first connecting element, and wherein the fluidic connector has a hollow-cylindrical second connecting element arranged axially parallel to the first connecting element.

10 . The silencer according to claim 9 , wherein at least one of the first connecting element and the second connecting element is integrally molded on the pipe.

11 . The silencer according to claim 9 , wherein the first connecting element and the second connecting element are arranged spaced apart transverse to a flow direction of the gas mixture in the pipe.

12 . The silencer according to claim 9 , wherein the pipe has a first connecting region fluidically connected to the first connecting element and a second connecting region fluidically connected to the second connecting element.

13 . The silencer according to claim 12 , wherein at least one of the first connecting region and the second connecting region is perforated.

14 . The silencer according to claim 13 , wherein the at least one of the first connecting region and the second connecting region is perforated differently from another region of the pipe.

15 . The silencer according to claim 12 , wherein at least one of the first connecting region and the second connection region is bent.

16 . The silencer according to claim 2 , wherein the absorption layer is composed of a porous sound-absorbing material.

17 . The silencer according to claim 16 , wherein the porous sound-absorbing material is a foam.

18 . The silencer according to claim 6 , wherein the acoustic resonator is a cavity resonator.

19 . The silencer according to claim 8 , wherein the fluidic connector has another hollow-cylindrical connecting element arranged axially parallel to the connecting element.

20 . A silencer for an engine intake, comprising:
a pipe for conducting a gas mixture, wherein the pipe is perforated at least in some regions; an absorption layer at least partially surrounding the pipe for absorbing a sound transmitted by the gas mixture, wherein the absorption layer is composed of a porous sound-absorbing material; an outer casing encasing the pipe and surrounding the absorption layer, wherein the outer casing is perforated in at least some regions; and a fluidic connector for connecting an acoustic resonator to the pipe, wherein the fluidic connector has at least one hollow-cylindrical connecting element; wherein the at least one connecting element is connected to a perforated connecting region of the pipe.

Assignees

• Mahle Int Gmbh

Inventors

• Zirkelbach Thomas

Classifications

• F02M35/1272

  using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes · CPC title

• F02M35/1283

  Manufacturing or assembly; Connectors; Fixations · CPC title

• F02M35/10111

  Substantially V-, C- or U-shaped ducts in direction of the flow path · CPC title

• F02M35/1261

  Helmholtz resonators · CPC title

• F02M35/10

  Air intakes; Induction systems · CPC title