Nowadays 1D fluid dynamic models are widely used by engine designers, since they can give sufficiently accurate predictions in short times, allowing to support the optimization and development work of any prototype. According to the last requirements in terms of pollutant emission control, some enhancements have been introduced in the 1D code GASDYN, to improve its ability in predicting the composition of the exhaust gas discharged by the cylinders and the transport of the chemical species along the exhaust system. The main aspects of the methods adopted to model the combustion process and the related formation of pollutants are described in the paper. To account for the burnt gas stratification, two different approaches have been proposed, depending on the expected turbulence levels inside the combustion chamber. The reliability of the simulation of the pollutant formation process has been enhanced by the integration of the thermodynamic module with the Chemkin code. The so-called super-extended Zeldovich mechanism has been introduced to perform a more detailed description of the NOx production process. Separate modules describe CO and HC formation, considering individually the crevices, the oil film layer and the partial burn contributions. The comparison between predictions and experimental measurements carried out on a new configuration of a Fiat-Alfa Romeo four-cylinder, 2.0 L automotive s.i. engine, has pointed out a satisfactory agreement in terms of pressure trends inside the cylinder and gas composition at different locations in the exhaust system.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Modeling the Pollutant Emissions from a S.I. Engine


    Additional title:

    Sae Technical Papers


    Contributors:
    Onorati, A. (author) / D'Errico, G. (author) / Ferrari, G. (author) / Cerri, T. (author)

    Conference:

    SAE 2002 World Congress & Exhibition ; 2002



    Publication date :

    2002-03-04




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Modeling the pollutant emissions from a spark ignition engine

    D Errico,G. / Ferrari,G. / Onorati,A. et al. | Automotive engineering | 2002


    Engine emissions : Pollutant formation and measurement

    Springer, George S. ;Patterson, Donald J. ;Edwards, J. B. | TIBKAT | 1973


    Modeling pollutant emissions in stagnant environments

    Yannopoulos, Panayotis C. | BASE | 2019

    Free access

    Modeling pollutant emissions in stagnant environments

    Yannopoulos, Panayotis C. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2019

    Free access