The influence of soy- and palm-based biofuels on the in-cylinder sources of unburned hydrocarbons (UHC) and carbon monoxide (CO) was investigated in an optically accessible research engine operating in a partially premixed, low-temperature combustion regime. The biofuels were blended with an emissions certification grade diesel fuel and the soy-based biofuel was also tested neat. Cylinder pressure and emissions of UHC, CO, soot, and NOx were obtained to characterize global fuel effects on combustion and emissions. Planar laser-induced fluorescence was used to capture the spatial distribution of fuel and partial oxidation products within the clearance and bowl volumes of the combustion chamber. In addition, late-cycle (30° and 50° aTDC) semi-quantitative CO distributions were measured above the piston within the clearance volume using a deep-UV LIF technique.Compared with neat diesel fuel, the palm-based biofuel blends produced the largest decrease in UHC (38-56%) and CO (28-44%), but generated significant increases in both NOx (17-37%) and soot (41-43%). With soy-based blends, however, UHC decreased by 30-43% and CO by 17-22%, while NOx (-1-2% increase) and soot (0.8-8.5% increase) emissions varied slightly. The UHC and CO emissions were found to correlate well with the combustion phasing of each fuel at a given injection timing. The UHC PLIF measurements demonstrated several differences in the evolution of the UHC distributions throughout the cylinder volume during the mixture formation, premixed heat-release, and mixing-controlled heat-release portions of the engine cycle. However, the late-cycle UHC PLIF and spectrally resolved CO LIF measurements showed no significant differences in the main sources of UHC and CO when fueling the engine with either diesel fuel or biofuel blends.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Optical Investigation of UHC and CO Sources from Biodiesel Blends in a Light-Duty Diesel Engine Operating in a Partially Premixed Combustion Regime


    Weitere Titelangaben:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Beteiligte:
    Petersen, Ben R. (Autor:in) / Ekoto, Isaac W. (Autor:in) / Miles, Paul C. (Autor:in)

    Kongress:

    SAE 2010 World Congress & Exhibition ; 2010



    Erscheinungsdatum :

    2010-04-12


    Format / Umfang :

    21 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Sources of UHC Emissions from a Light-Duty Diesel Engine Operating in a Partially Premixed Combustion Regime

    Foster, David E. / Ekoto, Isaac W. / Miles, Paul C. et al. | SAE Technical Papers | 2009



    Butanol-Diesel Blends for Partially Premixed Combustion

    Johansson, B.H. / Leermakers, C.A.J. / Somers, L.M.T. et al. | SAE Technical Papers | 2013


    An Experimental Analysis on Diesel/n-Butanol Blends Operating in Partial Premixed Combustion in a Light Duty Diesel Engine

    Corcione, Felice E. / Valentino, Gerardo / Serra, Simone et al. | SAE Technical Papers | 2012


    An Experimental Analysis on Diesel/n-Butanol Blends Operating in Partial Premixed Combustion in a Light Duty Diesel Engine

    Valentino, G. / Corcione, F.E. / Iannuzzi, S. et al. | British Library Conference Proceedings | 2012