The latest developments of engine models which are capable for real time application are focusing on predictive capability or fast modeling. The first aspect is addressed by physical based models. For the second aspect a new generation of empirical based models is developed. The empirical based model architecture is designed for covering all relevant combustion modes. In empirical modeling the capability for global operation is challenging. This is achieved by a certain signal flow setup, basing on a two-step approach for the core of the engine-process description. The proof of concept for Diesel engines is delivered in the past. It could be shown that high accuracy can be achieved for all calibration relevant responses including emission. The development of the new empirical model architecture is sufficient for both diesel and gasoline engines. The gasoline process can be represented by the model with high accuracy. Especially the responses air mass flow, fuel consumption and torque are with high quality level. Some specific adaptations in the test planning procedure are necessary. For the typical sensitivity about knock and misfire, the commercially available RT-control packages enable a robust test run for hull detection for definition of dynamic variation design space. The hull is the operation limitation for the dynamic test run. The model capability is validated in dynamic test cases. Open issue is the quality for emission representation in λ-1-concepts. Due to the relatively strong gradient change around λ = 1 and the strong influence of cycle to cycle variations, the accuracy for raw emission needs to be further improved for gasoline engines. The test bed net effort (without method development efforts) for data collection in the shown example is about 1.5 weeks (in 3-shift operation).


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Global dynamic modeling: A consistent approach for both diesel and gasoline engines


    Contributors:


    Publication date :

    2011


    Size :

    11 Seiten, 9 Bilder, 7 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Both the gasoline and diesel engines will be winners

    Hitomi,M. / Mazda Motor,JP | Automotive engineering | 2014


    Diesel, LPG, gasoline engines

    Teledyne Continental Motors,US | Automotive engineering | 1980


    Gasoline engines versus diesel engines for trucks

    Willett, Jr., H.L. | Engineering Index Backfile | 1949


    Future gasoline and diesel engines

    Monaghan,M.L. / Ricardo Consulting,GB | Automotive engineering | 2000


    Peugeots new gasoline, diesel engines

    Peugeot Citroen Engines,US | Automotive engineering | 1993