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A Novel 1D Co-Simulation Framework for the Prediction of Tailpipe Emissions under Different IC Engine Operating Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 9, 2019 by SAE International in United States
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The accurate prediction of pollutant emissions generated by IC engines is a key aspect to guarantee the respect of the emission regulation legislation. This paper describes the approach followed by the authors to achieve a strict numerical coupling of two different 1D modeling tools in a co-simulation environment, aiming at a reliable calculation of engine-out and tailpipe emissions. The main idea is to allow an accurate 1D simulation of the unsteady flows and wave motion inside the intake and exhaust systems, without resorting to an over-simplified geometrical discretization, and to rely on advanced thermodynamic combustion models and kinetic sub-models for the calculation of cylinder-out emissions. A specific fluid dynamic approach is then used to track the chemical composition along the exhaust duct-system, in order to evaluate the conversion efficiency of after-treatment devices, such as TWC, GPF, DPF, DOC, SCR and so on. This co-simulation environment is validated against a real engine configuration which was instrumented and tested at EMPA labs. A 4-cylinder SI, turbocharged, CNG engine is investigated at different loads and revolution speeds, to allow a wide validation with experimental data and verify the predictiveness of engine performances and pollutant emissions.
- Tarcisio Cerri - Politecnico di Milano
- Gianluca D'Errico - Politecnico di Milano
- Gianluca Montenegro - Politecnico di Milano
- Angelo Onorati - Politecnico di Milano
- Grigorios Koltsakis - Aristotle University of Thessaloniki
- Zissis Samaras - Aristotle University of Thessaloniki
- Konstantinos Michos - Exothermia
- Vasileios Tziolas - Exothermia
- Nikolaos Zingopis - Exothermia
- Panayotis Dimopoulos Eggenschwiler - EMPA
- Viola Papetti - EMPA
- Jakub Rojewski - EMPA
- Patrik Soltic - EMPA
CitationCerri, T., D'Errico, G., Montenegro, G., Onorati, A. et al., "A Novel 1D Co-Simulation Framework for the Prediction of Tailpipe Emissions under Different IC Engine Operating Conditions," SAE Technical Paper 2019-24-0147, 2019, https://doi.org/10.4271/2019-24-0147.
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