A Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion 2006-01-0195
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 is required as input data. High calculation speed is obtained by using table interpolation to calculate equilibrium temperatures and species concentrations. Test data from a single-cylinder engine and from a complete six-cylinder engine have been used for calibration and validation of the model. The model produces results of good agreement with emission measurements using approximately 50 combustion product zones and a calculation time of one second per engine cycle. Different compression ratios, EGR rates, injection timing, inlet pressures etc. were used in the validation tests. The model calculates thermal (high-temperature) NOx formation by the two reactions of the original Zeldovich mechanism but by using a simple empirical compensation algorithm, the model can also be used for low-temperature NOx formation associated with high EGR rates and long ignition delay.
Citation: Andersson, M., Johansson, B., Hultqvist, A., and Nöhre, C., "A Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion," SAE Technical Paper 2006-01-0195, 2006, https://doi.org/10.4271/2006-01-0195. Download Citation
Author(s):
Magnus Andersson, Bengt Johansson, Anders Hultqvist, Christof Nöhre
Affiliated:
Lund Institute of Technology, University of Karlsruhe
Pages: 13
Event:
SAE 2006 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Compression Ignition Combustion Process 2006-SP-2012
Related Topics:
Emissions measurement
Nitrogen oxides
Combustion and combustion processes
Exhaust gas recirculation (EGR)
Mathematical models
Pressure
Engine cylinders
Optimization
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »