Accurate heat release analysis of cylinder pressure data is a powerful tool used in the development of diesel engines. However, significant errors in the calculated heat release values can occur due to shortcomings in both the experimental measurements and in the heat release model and this can produce misleading results. This paper shows the effect of such common errors on the calculated gross heat release data obtained when analysing simulated and experimental direct injection diesel engine pressure diagrams using a traditional single-zone First Law heat release model. The work reveals that the greatest uncertainty in most cases will be caused by assuming the wrong rate of heat transfer between the cylinder charge and combustion chamber walls. To overcome this limitation, an alternative heat release model is proposed and shown to give very good results over a wide range of operating conditions. This heat release model, which uses a variable polytropic index to cater for the heat transfer, is best suited for diesel engine performance and development applications where consistent diesel engine heat release data are required.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Calculation of Heat Release in Direct Injection Diesel Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1999



    Publication date :

    1999-03-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Calculation of heat release in direct injection Diesel engines

    Brunt,M.F. / Platts,K.C. / Anglia Polytechnic Univ.,US et al. | Automotive engineering | 1999


    A phenomenological heat release model for direct injection diesel engines

    Stiesch,G. / Merker,G.P. / Univ.Hannover,DE | Automotive engineering | 1998



    Error Analysis In Indicated Pressure And Heat Release Calculations In Direct Injection Diesel Engines

    Belardini,P. / Bertoli,C. / Corcione,F. et al. | Automotive engineering | 1984


    Zero-dimensional modeling of combustion and heat release rate in direct injection diesel engines

    Rezaei,R. / Eckert,P. / Seebode,J. et al. | Automotive engineering | 2012