An experimental investigation was carried out in which an HSDI Common Rail Diesel engine was operated in both HCCI and conventional Diesel combustion modes, using conventional Diesel fuel in both cases. The engine used in the experiments was a single cylinder version of a modern passenger car engine with a displacement of 480 cc. In HCCI mode, the fuel was injected in multiple stages during the compression stroke, using a nozzle with a 60° included angle. To control the phasing and rate of combustion, the effective compression ratio was reduced by retarded intake valve closing. In addition, increased amounts of EGR were used. HCCI operation reduced soot and NOx emissions significantly. The use of a narrow included angle for conventional Diesel operation increased emissions significantly. The effect of a wider included angle and modifications to the piston were investigated experimentally and numerically. HCCI operation was also possible with a piezo injector with a 140° included angle. Because of the more accurate, shorter injections allowed by the piezo injector, interaction of the spray with the cylinder liner could be avoided, despite the wide included angle.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Operation of a DI Diesel Engine With Variable Effective Compression Ratio in HCCI and Conventional Diesel Mode


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2005 World Congress & Exhibition ; 2005



    Publication date :

    2005-04-11




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    HCCI diesel engine control design

    Albrecht,A. / Grondin,O. / Corde,G. et al. | Automotive engineering | 2007


    HCCI Operation of a Passenger Car Common Rail Dl Diesel Engine With Early Injection of Conventional Diesel Fuel

    Helmantel, A. / Denbratt, I. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    HCCI operation of a passenger car common rail direct injection diesel engine with early injection of conventional diesel fuel

    Helmantel,A. / Denbratt,I. / Chalmers Univ.of Technology,SE | Automotive engineering | 2004