Diesel engines are used in heavy duty applications because of their high efficiency and reliability. However, their high diesel particulates and NOx emissions remain major concerns.An eight cylinder direct injection diesel engine was connected to a partial flow particulate sampling mini-dilution tunnel. Six different grades of diesel fuels were studied for their regular emissions as well as smoke and particulate emissions. Each fuel was tested at three engine speeds and full load. This paper presents the results of these tests which includes analysis of the effects of load, cetane number, 90% distillation temperature, and density for steady state conditions.A correlation was developed for converting smoke numbers in Hartridge Smoke Units (HSU) to the specific particulate emissions by evaluating results of all fuels tests. Another correlation was also developed for diesel particulates and NOx emissions trade-off.The authors studied the effect of oxygen-enriched combustion to reduce the particulate emissions. However, oxygen addition leads to increase in NOx emissions. An oxygen-enriched diesel combustion model and NO emissions model were developed to get better understanding of NO formation mechanism.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effects of Fuel Composition on D.I. Diesel Engine Particulates and Study of Oxygen-Enriched Diesel NO Formation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1997



    Publication date :

    1997-02-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Automotive Diesel Engines-Fuel Composition vs Particulates

    Burley, Harvey A. / Rosebrock, Theodore L. | SAE Technical Papers | 1979


    Diesel particulates

    Birch,S. / Volvo,SE | Automotive engineering | 1989


    Oxygen-enriched diesel engine experiments with a low-grade fuel

    Marr,W.W. / Sekar,R.R. / Cole,R.L. et al. | Automotive engineering | 1993


    Changes in Diesel particulates with engine air/fuel ratio

    Roessler,D.M. / Faxvog,F.R. / General Motors Res.Lab.,Phys.Dep.,US | Automotive engineering | 1981


    Oxygen-Enriched Diesel Engine Experiments with a Low-Grade Fuel

    Longman, D. E. / Cole, R. L. / Sekar, R. R. et al. | SAE Technical Papers | 1993