The use of biofuels in IC engines is still being discussed intensely. Especially possible change of land use and the effect on claimed well-to-wheel CO2 emissions is contentious. This study only looks at the tank to wheel efficiency gains and reduction in CO2 emissions that advanced fuels and biofuels can offer, especially in combination with aggressively downsized engine technology and other fuel saving technologies. It is well known that there are inherent synergies between downsizing and the increased octane ratings that biofuel blends can offer. This study quantifies the CO2 reductions that can be achieved in a class D vehicle over the NEDC and the more real-world Artemis drive cycles. The rigorous correlation procedure combined with the high quality engine test data that was used as input to the model ensures the highest quality drive cycle modelling data. The results show clearly that very significant CO2 emission reduction of up 30 and 34% can be achieved for RON95 and E85 respectively on the NEDC relative to the 2L base engine. These improvements more than offset the reduction in energy content of the ethanol blends and therefore still show a reduction in volumetric fuel consumption. Across the higher load Artemis cycle the CO2 reductions are more modest, but still significant with between 20 to 24% for RON95 and E85 respectively. The NEDC and even the Artemis drive cycle are not very demanding in terms of load for this aggressively downsized engine in a class D vehicle. This means that the benefits that biofuel blends can offer are not fully capitalised on. Either increased levels of downsizing or higher engine compression ratios would be appropriate means to make better use of the fuel properties that advanced fuels offer. Increased levels of downsizing might be more difficult to achieve due to the higher in-cylinder pressures that are required. Decreasing the number of cylinders to 2 might offset increased levels of friction. The likely reduced torque response would need to be addressed by an enhanced charging system and perhaps increased levels of hybridisation. This is the subject of current investigations and it is anticipated that results can be presented shortly.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Significant CO2 reductions by utilising the synergies between a downsized SI engine and biofuels


    Beteiligte:
    OudeNijeweme, D. (Autor:in) / Stansfield, P. (Autor:in) / Bisordi, A. (Autor:in) / Bassett, M. (Autor:in) / Williams, J. (Autor:in) / Gold, M. (Autor:in) / Ali, R. (Autor:in) / Rogerson, J. (Autor:in)


    Erscheinungsdatum :

    2011


    Format / Umfang :

    14 Seiten, 14 Bilder, 15 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Downsizing and biofuels: synergies for significant CO2 reductions

    Korte,V. / Oudenijeweme,D. / Bisordi,A. et al. | Kraftfahrwesen | 2011


    Downsized boosted engine benchmarking and results

    Stuhldreher,M. / Schenk,C. / Brakora,J. et al. | Kraftfahrwesen | 2015


    Downsized Boosted Engine Benchmarking and Results

    Moskalik, Andrew / Schenk, Charles / Hawkins, David et al. | SAE Technical Papers | 2015


    Downsized Boosted Engine Benchmarking and Results

    Stuhldreher, Mark / Schenk, Charles / Brakora, Jessica et al. | British Library Conference Proceedings | 2015


    Compressed-natural-gas optimised downsized demonstrator engine

    Hall, Jonathan / Hibberd, Benjamin / Streng, Simon et al. | SAGE Publications | 2018