Fully Variable Valve Actuation (FVVA) systems enable to employ a wide range of combustion strategies by providing the actuation of a gas exchange valve at an arbitrary point in time, with variable lift and adjustable ramps for opening and closing. Making such a system ready for the market requires appropriate fault-diagnostic functionality. Here, we focus on diagnosis possibilities by using air intake system sensors such as Manifold Absolute Pressure (MAP) sensors. Results obtained on a 4-cylinder test bench engine are presented for the early intake opening strategy under different loads, and at medium range rotational speeds on steady-state conditions. It is shown that detection and identification of the different critical faults on each actuator is possible by using a Fourier series signal model of the MAP sensor.


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    Titel :

    Fault Diagnosis of Fully Variable Valve Actuators on a Four Cylinder Camless Engine


    Weitere Titelangaben:

    Sae Int. J. Engines


    Beteiligte:
    Saraç, Ipek (Autor:in) / Mischker, Karsten (Autor:in)

    Kongress:

    SAE World Congress & Exhibition ; 2008


    Erschienen in:

    Erscheinungsdatum :

    2008-04-14


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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