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Development and Validation of a Three Pressure Analysis (TPA) GT-Power Model of the CFR F1/F2 Engine for Estimating Cylinder Conditions
Technical Paper
2018-01-0848
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The CFR engine is the widely accepted platform to test standard Research Octane Number (RON) and Motored Octane Number (MON) for determining anti-knock characteristics of motor fuels. With increasing interest in engine downsizing, up-torquing, and alternative fuels for modern spark ignition (SI) engines, there is a need to better understand the conditions that fuels are subjected to in the CFR engine during octane rating. To take into account fuel properties, such as fuel heat of vaporization, laminar flame speed and auto-ignition chemistry; and understand their impacts on combustion knock, it is essential to estimate accurate cylinder conditions. In this study, the CFR F1/F2 engine was modeled using GT-Power with the Three Pressure Analysis (TPA) and the model was validated for different fuels and engine conditions. The finite element cylinder model was applied to better estimate heat transfer and cylinder wall temperatures of the cast iron combustion chamber (piston, cylinder, and head) of the CFR engine under continuous standard knocking operation. Uncertainty of unburned gas temperature and cylinder wall temperatures estimation was analyzed depending on uncertainty in experimentally measured and prescribed model input parameters. The model was finally used to estimate the IVC conditions (trapped mass, residual gas fraction, and temperature), as well as unburned gas temperature and cylinder wall temperatures for various fuels throughout the engine cycle.
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Choi, S., Kolodziej, C., Hoth, A., and Wallner, T., "Development and Validation of a Three Pressure Analysis (TPA) GT-Power Model of the CFR F1/F2 Engine for Estimating Cylinder Conditions," SAE Technical Paper 2018-01-0848, 2018, https://doi.org/10.4271/2018-01-0848.Data Sets - Support Documents
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References
- Pal , P. , Kolodziej , C.P. , Choi , S. , Broatch , A. et al. Development of a Virtual CFR Engine Model for Knocking Combustion Analysis SAE Technical Paper, 2018 10.4271/2018-01-0187
- Swarts , A. and Yates , A. In-Cylinder Fuel Evaporation and Heat Transfer Information Inferred from the Polytropic Character of the Compression Stroke in a Spark-Ignition Engine SAE Technical Paper, 2004 10.4271/2004-01-1856
- Dimpelfeld , P.M. and Foster , D.E. The Prediction of Auto Ignition in a Spark Ignition Engine SAE Technical Paper, 1984 10.4271/841337
- Foong , T.M. , Brear , M.J. , Morganti , K.J. , da Silva , G. et al. Modeling End-Gas Autoignition of Ethanol/Gasoline Surrogate Blends in the Cooperative Fuel Research Engine Energy Fuels 31 3 2378 2389 2017
- Rockstroh , T. , Kolodziej , C.P. , Goldsborough , S. , and Wallner , T. Insights into Engine Knock: Comparison of Knock Metrics Across a Range of Intake Temperature and Pressure in the CFR Engine SAE Technical Paper 2018-01-0210 2018
- Kolodziej , C.P. and Wallner , T. Combustion Characteristics of Various Fuels during Research Octane Number Testing on an Instrumented CFR F1/F2 Engine Combust. Engines 171 4 164 169 2017 10.19206/CE-2017-427
- 2014
- Morganti , K.J. 2013
- 2016
- ASTM 1973-74 ASTM Manual for Rating Motor, Diesel, and Aviation Fuels Philadelphia American Society for Testing and Materials 1973
- Grandin , B. and Denbratt , I. The Effect of Knock on Heat Transfer in SI Engines SAE Technical Paper, 2002 10.4271/2002-01-0238