Current flexi fuel gasoline and ethanol engines have brake efficiencies generally lower than a dedicated gasoline engines because of the constraints to accommodate a variable mixture of the two fuels. Considering ethanol has a few advantages with reference to gasoline, namely the higher octane number and the larger heat of vaporization, the paper explores the potentials of dedicated pure ethanol engines using the most advanced techniques available for gasoline engines, specifically direct injection, turbo charging and variable valve actuation. Computations are performed with state-of-the-art, well validated, engine and vehicle performance simulations packages, generally accepted to produce accurate results targeting major trends in engine developments. The higher compression ratio and the higher boost permitted by ethanol allows larger top brake efficiencies than gasoline, while variable valve actuation produces small penalties in efficiency changing the load. Finally, small, high power density, turbo charged, direct injection, variable valve actuation load controlled engines are proved to operate very efficiently over driving cycles.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Performances of a Turbocharged E100 Engine with Direct Injection and Variable Valve Actuation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2010 Powertrains Fuels & Lubricants Meeting ; 2010



    Publication date :

    2010-10-25




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Initial development of a turbocharged direct injection E100 combustion system

    Brewster,S. / Orbital Engine,AU | Automotive engineering | 2007


    Combustion Analysis on a Variable Valve Actuation Spark Ignition Engine Operating With E22 and E100

    baeta, Adm José / Pimenta, Charles / Fernandes, Heder et al. | SAE Technical Papers | 2017


    Combustion Analysis on a Variable Valve Actuation Spark Ignition Engine Operating With E22 and E100

    Trevas, Igor / baeta, Adm José / Pimenta, Charles et al. | British Library Conference Proceedings | 2017



    Performances of a turbocharged gasoline engine with variable valve timing system

    Kanamaru,K. / Kawamoto,K. / Sano,H. et al. | Automotive engineering | 1992