This paper claims that, instead of relying on direct fuel and air flow rate measurements, exhaust gaseous emissions analysis should be considered as the standard method for the determination of air-fuel ratio, in particular for petrol-powered engines.Various sensitivity parameters are defined and the maximum possible relative divergences of the fuel-air ratio are calculated to support the above claim. It is proved that to obtain the air-fuel ratio with the same accuracy for a petrol engine, the accuracy of the instruments used for fuel and air flow rate measurements should be at least 10 times more accurate than the emission analysers.Estimations of hydrogen and oxygen concentration based on other measurable emission concentrations in the exhaust gas stream are also conducted and validated satisfactorily with the experimental data.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Exhaust Emission Based Air-Fuel Ratio Model (II): Divergence Analysis and Emission Estimations


    Additional title:

    Sae Technical Papers


    Contributors:
    Zhu, J. (author) / Chan, S. H. (author)

    Conference:

    International Congress & Exposition ; 1996



    Publication date :

    1996-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Exhaust emission based air-fuel ratio model (II): divergence analysis and emission estimations

    Chan,S.H. / Zhu,J. / Nanyang Technological Univ.,CN | Automotive engineering | 1996


    Exhaust emission based air-fuel ratio model (I): literature reviews and modelling

    Chan,S.H. / Zhu,J. / Nanyang Technological Univ.,CN | Automotive engineering | 1996




    Divergence analysis of an emissions-based air-fuel ratio model and exhaust oxygen estimation

    Chan,S.H. / Zhu,J. / Nanyang Tech.Univ.,School of Mechanica and Production Engng.,SG | Automotive engineering | 1997