This paper studies autoignition characteristics and HCCI engine combustion of ketone fuels, which are important constituents of recently discovered fungi-derived biofuels. Two ketone compounds, 2,4-dimethyl-3-pentanone (DMPN) and cyclopentanone (CPN), are systematically investigated in the Sandia HCCI engine, and the results are compared with conventional gasoline and neat ethanol. It is found that CPN has the lowest autoignition reactivity of all the biofuels and gasoline blends tested in this HCCI engine. The combustion timing of CPN is also the most sensitive to intake-temperature (Tin) variations, and it is almost insensitive to intake-pressure (Pin) variations. These characteristics and the overall HCCI performance of CPN are similar to those of ethanol. In contrast, DMPN shows multi-faceted autoignition characteristics. On the one hand, DMPN has strong temperature-sensitivity, even at boosted Pin, which is similar to the low-reactivity ethanol and CPN. On the other hand, DMPN shows much stronger pressure-sensitivity than ethanol and CPN. This pressure-sensitivity reduces the Tin requirement for DMPN as Pin increases, in a manner similar to gasoline, and it allows the same Tin = 60°C for DMPN as for gasoline at Pin = 2.4 bar. At this Pin, DMPN reaches a maximum HCCI load similar to gasoline, ∼ 14 bar IMEP. Unlike gasoline, which requires significant combustion-timing retard to prevent knock at this maximum load, DMPN allows a more advanced combustion timing because its high temperature-sensitivity causes a lower heat release rate. As a result, DMPN yields a higher thermal efficiency than gasoline at comparable loads.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Bio-Ketones: Autoignition Characteristics and Their Potential as Fuels for HCCI Engines


    Additional title:

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


    Contributors:
    Dec, John E. (author) / Yang, Yi (author)

    Conference:

    SAE/KSAE 2013 International Powertrains, Fuels & Lubricants Meeting ; 2013



    Publication date :

    2013-10-14


    Size :

    16 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Bio-Ketones: Autoignition Characteristics and Their Potential as Fuels for HCCI Engines

    Yang, Y. / Dec, J. / Society of Automotive Engineers | British Library Conference Proceedings | 2013


    Influence of Engine Speed on HCCI Combustion Characteristics using Dual-Stage Autoignition Fuels

    Hosseini, Vahid / Neill, W. Stuart / Chippior, Wallace L. | SAE Technical Papers | 2009


    The available and required autoignition quality of gasoline-like fuels in HCCI engines at high temperatures

    Kalghatgi,G.T. / Head,R.A. / Shell Global Solutions,GB | Automotive engineering | 2004


    Influence of engine speed on HCCI combustion characteristics using dual-stage autoignition fuels

    Hosseini,V. / Neill,W.S. / Chippior,W.L. et al. | Automotive engineering | 2009