Real time engine simulation including gas dynamics and combustion is a key-enabler for testing pre-industrial engine control device functions. The first objective of this study is to show that is possible to develop a tool able to support the software strategies development engineers throughout the conception and validation processes of an ECU (Engine Control Unit). The proposed model includes a zero-dimensional mean value approach of the simulation of the complete air path. The physical behaviour of each component involved in the air path from the air filter to the after treatment has been described on the base of an OEM (Original Equipment Manufacturer) engine project definition. This step goes by the individual parameterization of the characteristic geometrical values such as cross section diameter or turbine nozzles area. It also goes by the definition of discharge coefficients or some efficiency from experimental data on the air mass flow, pressure and temperature or OEM data like compressor efficiency map. An improvement, on the base of the existing combustion model, has been done to reproduce the heat release mean value behaviour and HC and the soot mass evolution for both normal and regeneration mode. The validation has been realized first for steady state operating points and the numerical results have been compared and validated with a good accuracy to experimental data from the OEM engine project test bench. The dynamic validations have been done comparing model results with vehicle data with some standard operating point such as accelerations or ECE driving cycle and are correctly correlated. A failure mode has been also simulated. This mode shows the ability of the model to reproduce some trouble concerning components such as throttle blocked open or close, sensor malfunction. The architecture of the model with all components model separately allows the user to evaluate the consequences in the system of defective parts such as a leakage after compressor air intake pipe, hole in DPF (Diesel Particulate Filter), high HC concentration in OxiCat. This kind of functionality is a major outlook of the model and is very useful for the development engineer to elaborate some degraded and safe mode management strategy of the vehicle for the overall operating conditions of the engine.


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    Title :

    Real time modelling of air system in a 4 cylinder diesel combustion engine in HIL test bench for the validation of EU5 personal car with diesel particulate filter


    Additional title:

    Echtzeitmodellierung des Luftsystems in einem Vierzylinder-Dieselmotor in einem Hardware-in-the Loop (HiL)-Prüfstand zur Validierung der Euro5-Norm für einen Personenkraftwagen mit Dieselpartikelfilter


    Contributors:
    Millet, J.B. (author) / Aubertin, F. (author) / Lehr, M. (author)


    Publication date :

    2008


    Size :

    14 Seiten, 10 Bilder, 3 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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