In order to investigate the effects of split injection on emission formation and engine performance, experiments were carried out using a heavy duty single cylinder diesel engine. Split injections with varied dwell time and start of injection were investigated and compared with single injection cases. In order to isolate the effect of the selected parameters, other variables were kept constant. In this investigation no EGR was used. The engine was equipped with a common rail injection system with a piezo-electric injector. To interpret the observed phenomena, engine CFD simulations using the KIVA-3V code were also made.The results show that reductions in NOx emissions and brake specific fuel consumption were achieved for short dwell times whereas they both were increased when the dwell time was prolonged. No EGR was used so the soot levels were already very low in the cases of single injections. The results indicated, however, no increase in soot as a result of splitting the injection in two parts. Both HC and CO emissions were found to increase with split injections.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental and Numerical Investigation of Split Injections at Low Load in an HDDI Diesel Engine Equipped with a Piezo Injector


    Additional title:

    Sae Technical Papers



    Conference:

    Powertrain & Fluid Systems Conference and Exhibition ; 2006



    Publication date :

    2006-10-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Investigation of Mixture Formation Process in a HDDI Diesel Engine by CFD and Imaging Technique

    Allocca, L. / Auriemma, M. / Corcione, F. E. et al. | British Library Conference Proceedings | 2005


    Investigation of mixture formation process in a HDDI diesel engine by CFD and imaging technique

    Allocca,L. / Auriemma,M. / Corcione,F.E. et al. | Automotive engineering | 2005



    Effect of difference of high pressure fuel injection systems on exhaust emissions from HDDI diesel engine

    Ueki,S. / Miura,A. / Nissan Diesel Motor,JP | Automotive engineering | 1999