An intake manifold produced a distinct whistle noise in a vehicle while driving through high torque conditions. The diagnostic tests in a steady air flow test bench helped reveal that the whistle was occurring due to the shear layer instabilities in the air flow over the sump cavity in the intake manifold which acts as an Helmoltz-like resonator. Joint time-frequency domain signal analysis was applied to detect the peak whistle. A sharp radius and a ramp at the upstream edge of the sump cavity reduced the peak whistle sound pressure level from 106dB to 85dB in the air flow bench and made the whistle inaudible in the vehicle. Tolerance study was performed on this geometry to allow manufacturing variations. A test method, using rapid prototype parts, has been developed in order to identify whistles early in the design cycle.


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    Titel :

    Intake Manifold Whistle Suppression in a Product Development Environment


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Hanner, Dave (Autor:in) / Seifert, John (Autor:in) / Golletti, Tony (Autor:in) / Kannan, Venkatesh (Autor:in)

    Kongress:

    SAE 2004 World Congress & Exhibition ; 2004



    Erscheinungsdatum :

    08.03.2004




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Kannan, V. / Seifert, J. / Golletti, T. et al. | British Library Conference Proceedings | 2004


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    Kannan,V. / Seifert,J. / Golletti,T. et al. | Kraftfahrwesen | 2004


    2004-01-0395 Intake Manifold Whistle Suppression in a Product Development Environment

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    Vortex Whistle in Radial Intake

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    Practice of Intake Manifold Development

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