A Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion

摘要: In this paper a fast NOx model is presented which can be used for engine optimization, aftertreatment control or virtual mapping. A cylinder pressure trace required as input data. High calculation speed obtained by using table interpolation to calculate equilibrium temperatures and species concentrations. Test data from single-cylinder complete six-cylinder have been calibration validation of the model. The produces results good agreement with emission measurements approximately 50 combustion product zones time one second per cycle. Different compression ratios, EGR rates, injection timing, inlet pressures etc. were in tests. calculates thermal (high-temperature) formation two reactions original Zeldovich mechanism but simple empirical compensation algorithm, also low-temperature associated high rates long ignition delay.