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Application of Modeling Technology in a Turbocharged SI Engine
Technical Paper
2013-01-1621
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Improvements to 1D engine modeling accuracy and computational speed have led to greater reliance on this simulation technology during the engine development process. The benefits of modeling show up in many ways: increased simulation iterations for better optimization, reduction in prototype hardware iterations, reduction in program timing and overall cost.
In this study a 1D GT-Power model of a turbocharged engine system was used to assist in the initial design phase and throughout the program. The model was developed using Chrysler Group LLC proprietary modeling features for predictive combustion and knock event prediction. In all stages of this project the model's accuracy was improved through regular correlation with dynamometer data.
This paper mainly focuses on engine compression ratio selection, turbocharger selection, and cycle-to-cycle variation/cylinder-to-cylinder variation reduction through the combination of 1D GT-Power model optimization and dynamometer tests. In the case of cycle-to-cycle variation/cylinder-to-cylinder variation it is found that mixture of RGF, CEGR, air and fuel (PFI only) back-flowing from intake and exhaust valves is re-distributed into each cylinder at current cycle and the following cycle. Consequently the back flow through intake valve and exhaust valve is one of the main factors generating these variations in each cylinder. Based upon this understanding, a new set of valve lift profiles is designed through 1D GT-Power model optimization, together with input from valve design engineer, which shows that the approach used yields benefits in fuel consumption, EGR tolerance, and engine stability and engine performance enhancement.
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Zhong, L., Musial, M., Resh, W., and Singh, K., "Application of Modeling Technology in a Turbocharged SI Engine," SAE Technical Paper 2013-01-1621, 2013, https://doi.org/10.4271/2013-01-1621.Also In
References
- Atkinson , C. and Mott , G. Dynamic Model-Based Calibration Optimization: An Introduction and Application to Diesel Engines SAE Technical Paper 2005-01-0026 2005 10.4271/2005-01-0026
- Rask , E. and Sellnau , M. Simulation-Based Engine Calibration: Tools, Techniques, and Applications SAE Technical Paper 2004-01-1264 2004 10.4271/2004-01-1264
- Zhong , L.R. A Control Strategy For Cold Starting Of A Diesel Engine With Common Rail Fuel Injection System Ph.D Dissertation Mechanical Engineering Department, Wayne State University 2006
- Zhong , L.R. , Henein , N. A. and Bryzik , W. A New Predictive ID Model for Advanced High Speed Direct Injection Diesel Engines ICEF 2004-892, ASME Internal Combustion Engine Division, 2004 Fall Technical Conference Long Beach CA 2004
- Zhong , L. , Singh , I. , Han , J. , Lai , M. et al. Effect of Cycle-to-Cycle Variation in the Injection Pressure in a Common Rail Diesel Injection System on Engine Performance SAE Technical Paper 2003-01-0699 2003 10.4271/2003-01-0699
- Zhong , L. , Henein , N. , and Bryzik , W. Simulation-Based Cold-Start Control Strategy for a Diesel Engine with Common Rail Fuel System at Different Ambient Temperatures SAE Technical Paper 2007-01-0933 2007 10.4271/2007-01-0933
- Nitu , B. , Singh , I. , Zhong , L. , Badreshany , K. et al. Effect of EGR on Autoignition, Combustion, Regulated Emissions and Aldehydes in DI Diesel Engines SAE Technical Paper 2002-01-1153 2002 10.4271/2002-01-1153
- Hoepke , B. , Jannsen , S. , Kasseris , E. , and Cheng , W. EGR Effects on Boosted SI Engine Operation and Knock Integral Correlation SAE Int. J. Engines 5 2 547 559 2012 10.4271/2012-01-0707
- Pirault , J. , Ryan , T. , Alger , T. , and Roberts , C. Performance Predictions for High Efficiency Stoichiometric Spark Ignited Engines SAE Technical Paper 2005-01-0995 2005 10.4271/2005-01-0995
- Ayala , F. , Gerty , M. , and Heywood , J. Effects of Combustion Phasing, Relative Air-fuel Ratio, Compression Ratio, and Load on SI Engine Efficiency SAE Technical Paper 2006-01-0229 2006 10.4271/2006-01-0229
- Serrano , J. , Climent , H. , Arnau , F. , and Traumat , G. Global Analysis of the EGR Circuit in a HSDI Diesel Engine in Transient Operation SAE Technical Paper 2005-01-0699 2005 10.4271/2005-01-0699
- GT-Power User's Manual, GT-SUITETM Version V6.2 2007