A measurement technique is described which permits quantitative, multi-point, in-cylinder fluid composition measurements in an internal combustion engine. The technique is based on spontaneous Raman scattering with broadband signal collection, and provides simultaneous determination of the mole fractions of H2O, CO2, N2, O2, and fuel (C3H8). Calibration and data reduction procedures which largely eliminate interference between the signals from the various species are discussed. Mean mole fractions obtained in an optical access engine from the beginning of the intake stroke to the end of the compression stroke are reported. The mean mole fractions of the individual species are used to obtain independent estimates of the mean mole fraction of burnt residual gases, which, in turn, are used to evaluate the accuracy and consistency of the data. An over-prediction of the CO2 mole fraction in hot exhaust gases is found to be the most significant shortcoming of the technique. This over-prediction is believed due to variation in the scattering cross-section of CO2 with temperature.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Quantitative In-Cylinder Fluid Composition Measurements Using Broadband Spontaneous Raman Scattering


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1996



    Publication date :

    1996-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Quantitative in-cylinder fluid composition measurements using broadband spontaneous Raman scattering

    Miles,P. / Dilligan,M. / Sandia National Lab.,Livermore,US | Automotive engineering | 1996


    High-Pressure Spontaneous Raman Scattering Based Temperature Measurements

    Haller, Timothy W. / Reising, Heath H. / Clemens, Noel T. et al. | AIAA | 2017



    Vibrational relaxation measurements in an expanding flow using spontaneous Raman scattering

    SHARMA, SURENDRA P. / RUFFIN, STEPHEN M. / GILLESPIE, WALTER D. et al. | AIAA | 1993


    Quantitative measurements of residual and fresh charge mixing in a modern spark-ignition engine using spontaneous Raman scattering

    Hinze,P.C. / Miles,P.C. / Sandia National Lab.,Livermore,US | Automotive engineering | 1999