For natural gas (NG)-diesel RCCI, a multi-zonal, detailed chemistry modeling approach is presented. This dual fuel combustion process requires further understanding of the ignition and combustion processes to maximize thermal efficiency and minimize (partially) unburned fuel emissions. The introduction of two fuels with different physical and chemical properties makes the combustion process complicated and challenging to model.In this study, a multi-zone approach is applied to NG-diesel RCCI combustion in a heavy-duty engine. Auto-ignition chemistry is believed to be the key process in RCCI. Starting from a multi-zone model that can describe auto-ignition dominated processes, such as HCCI and PCCI, this model is adapted by including reaction mechanisms for natural gas and NOx and by improving the in-cylinder pressure prediction.The model is validated using NG-diesel RCCI measurements that are performed on a 6 cylinder heavy-duty engine. For three different engine operating points, it is operated at various diesel injection timings and NG-diesel blend ratios. The validation is focused on variables that are relevant for engine control, such as CA50, peak cylinder pressure, and engine-out NOx emissions. The validation shows that the multi-zone method with detailed chemistry reproduces the correct trends for important control parameters. From this validated model, real-time, map-based RCCI models are derived, which are considered to be an important step towards model-based NG-diesel RCCI control development.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Towards Control-Oriented Modeling of Natural Gas-Diesel RCCI Combustion


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2015 World Congress & Exhibition ; 2015



    Publication date :

    2015-04-14




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Towards Control-Oriented Modeling of Natural Gas-Diesel RCCI Combustion

    Bekdemir, Cemil / Baert, Rik / Willems, Frank et al. | British Library Conference Proceedings | 2015


    Intermediate Combustion Modes between Conventional Diesel and RCCI

    Boehman, Andre / Chen, Heng / Martin, Jonathan et al. | SAE Technical Papers | 2018


    Intermediate Combustion Modes between Conventional Diesel and RCCI

    Martin, Jonathan / Boehman, Andre / Topkar, Rutvik et al. | British Library Conference Proceedings | 2018


    Heavy-Duty RCCI Operation Using Natural Gas and Diesel

    Dempsey, Adam B. / Nieman, Derek E. / Reitz, Rolf D. | SAE Technical Papers | 2012


    Heavy-Duty RCCI Operation Using Natural Gas and Diesel

    Nieman, D.E. / Dempsey, A.B. / Reitz, R.D. et al. | British Library Conference Proceedings | 2012