Silencer

  • US 20030173146A1
  • Filed: 02/13/2003
  • Published: 09/18/2003
  • Est. Priority Date: 06/13/2001
  • Status: Active Grant
First Claim
Patent Images

1. Noise damper (1) for pipelines carrying noise-laden gasses, particularly for an intake line and/or exhaust gas line of an internal combustion motor, comprising an outside pipe (2) with an admission side (3) and a discharge side (4), a plurality of diaphragm rings (9, 9

  • , 9

    , 9



    ,9



    ) having a respective outside surface in communication (5) with the inside surface of the outside pipe (2) and at least one insert (6) having an outside surface in communication (7) with the inside surface of the outside pipe (2) and/or of the diaphragm rings (9, 9

    , 9

    , 9



    , 9



    ) and having a plurality of openings (8) closed at one side, whereby the insert (6) forms sub-lines for the gas flow in the noise damper (1), and the openings (8) closed at one side open into the sub-lines and comprise a depth of λ

    /4 with reference to the wavelength λ

    of a frequency to be damped, characterized by by at least one apertured wall (10, 10

    , 11, 11

    ) that extends between at least two diaphragm rings (9, 9

    , 9

    , 9



    , 9



    ) with an outside surface in communication (7) with at least the inside surface of the two diaphragm rings (9, 9

    , 9

    , 9



    , 9



    ), whereby at least one resonance chamber is defined between the two diaphragm rings (9, 9

    , 9

    , 9



    , 9



    ), the apertured wall (10, 10

    , 11, 11

    ) and the outside pipe (2).

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