One of the dominant noise sources of small two-stroke-cycle and crankcase-scavenged engines (port covered and uncovered by the working piston) represents the intake noise. The opening and closing of the port of these engines which are used to drive chain saws causes intake oscillations of big amplitudes. These are an important part of the total noise with regard to the point of measurement at the ear of the saw operator.By using a special intake port shape and the advancing of the port opening the gradient of the cross section course is reduced. The reduction of the total noise level is about 2–4 dB (A) as a function of the speed at full load while the delivery rate and the output remain constant.


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    Titel :

    Modifications on the Intake Ports with the Aim to Reduce the Noise of a Two-Stroke-Crankcase-Scavenged Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Groth, Klaus (Autor:in) / Kania, Norbert (Autor:in)

    Kongress:

    1982 SAE International Off-Highway and Powerplant Congress and Exposition ; 1982



    Erscheinungsdatum :

    01.02.1982




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Modifications on the Intake ports with the Aim to Reduce the Noise of a Two-Strake-Crankcase-Scavenged Engine

    Groth,K. / Kania,N. / Univ.Hannover,Inst.f.Kolbenmasch. et al. | Kraftfahrwesen | 1982


    CFD Prediction of Crankcase Flow Regimes in a Crankcase Scavenged Two-Stroke Engine

    Cunningham, G. / Boyall, J. / Kee, R. J. | SAE Technical Papers | 1997


    CFD prediction of crankcase flow regimes in a crankcase scavenged two-stroke engine

    Cunnigham,G. / Kee,R.J. / Boyall,J. et al. | Kraftfahrwesen | 1997



    Improving the performance of a crankcase-scavenged two-stroke engine with a fluid diode

    Sher,E. / Univ.of the Negev,Dep.of Mech.Eng.,Beer Sheva,IL | Kraftfahrwesen | 1982