(UL)
PDF
  • Real time capable virtual NOx sensor for diesel engines based on a two-zone thermodynamic model [Elektronski vir]
    Vihar, Rok, 1988- ; Žvar Baškovič, Urban ; Katrašnik, Tomaž
    This paper presents a control-oriented thermodynamic model capable of predicting nitrogen oxides (NOx) emissions in diesel engines. It is derived from zero-dimensional combustion model using ... in-cylinder pressure as the input. The methodology is based on a two-zone thermodynamic model which divides the combustion chamber into a burned and unburned gas zone. The original contribution of proposed method arises from: (1) application of a detailed two-zone modeling framework, developed in a way that the thermodynamic equations could be solved in a closed form without iterative procedure, which provides the basis for achieving high level of predictiveness, on the level of real-time capable models and (2) introduction of relative air-fuel ratio during combustion as a main and physically motivated calibration parameter of the NOx model. The model was calibrated and validated using data sets recorded in two different direct injection diesel engines, i.e. a light and a heavy-duty engine. The model is suitable for real-time applications since it takes less than a cycle to complete the entire closed cycle thermodynamic calculation including NOx prediction, which opens the possibility of integration in the engine control unit for closed-loop or feed-forward control.
    Vir: Oil & gas science and technology [Elektronski vir]. - ISSN 1953-8189 (Vol. 73, Apr. 2018, f. 1-17)
    Vrsta gradiva - e-članek
    Leto - 2018
    Jezik - angleški
    COBISS.SI-ID - 16019995

    Povezava(-e):

    https://ogst.ifpenergiesnouvelles.fr/articles/ogst/abs/2018/01/ogst170111/ogst170111.html
    Repozitorij Univerze v Ljubljani – RUL
    DOI

Vnos na polico