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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

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


    Additional title:

    Sae Int. J. Engines


    Contributors:

    Conference:

    SAE World Congress & Exhibition ; 2008


    Published in:

    Publication date :

    2008-04-14


    Size :

    10 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Fault diagnosis of fully variable valve actuators on a four cylinder camless engine

    Sarac,I. / Mischker,K. / Bosch,Stuttgart,DE | Automotive engineering | 2008


    Performance Evaluation of a Camless Engine Using Valve Actuators with Programmable Timing

    Erickson, Frederick L. / Gould, Larrie A. / Richeson, William E. | SAE Technical Papers | 1991


    Camless engine

    Schechter,M.M. / Levin,M.B. / Ford Research Lab.,GB | Automotive engineering | 1996


    Performance evaluation of a camless engine using valve actuators with programmable timing

    Gould,L.A. / Richeson,W.E. / Erickson,F.L. et al. | Automotive engineering | 1991


    Camless Engine

    Levin, Michael B. / Schechter, Michael M. | SAE Technical Papers | 1996