This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Variable Compression Ratio Engines
Technical Paper
2009-36-0245
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The main focus of this work is to study variable compression ratio engines. The study begins with an analyze of the benefits of a variable compression ratio for Otto Cycle engines including mechanisms that already exist, the usual constructive solutions and the project criteria adopted in the area.
The kinematic and dynamic model of SVC Saab mechanism, using Newton-Euler equations, is developed. Also, the cylinder pressure curve is important to be determined. The pressure curve and the cylinder volume function will be evaluated analytically considering the variation of the compression ratio.
Furthermore, in order to know the influence of the design parameters in kinematic and dynamic, some sensitivity analysis of the engine mechanism will be performed. Finally, a computational implementation of the engine mechanisms analyzed will be done in Matlab language. This implementation includes the crank mechanisms and its kinematic and dynamic analyzes.
Recommended Content
Authors
- Maurilio De Bortoli Cassiani - Department of Mechanic Design, Faculty of Mechanical Engineering — Unicamp
- Marco Lucio Bittencourt - Department of Mechanic Design, Faculty of Mechanical Engineering — Unicamp
- Luis Antonio Galli - Development Engineering, Thyssenkrupp Metalúrgica Campo Limpo LTDA
- Sergio Gradella Villalva - Development Engineering, Thyssenkrupp Metalúrgica Campo Limpo LTDA
Citation
De Bortoli Cassiani, M., Bittencourt, M., Galli, L., and Villalva, S., "Variable Compression Ratio Engines," SAE Technical Paper 2009-36-0245, 2009, https://doi.org/10.4271/2009-36-0245.Also In
References
- Schwaderlapp, M. Habermann, K. Yapici, K. I. “Variable Compression Ratio — A Design Solution for Fuel Economy Concepts” SAE Technical Papers, (2002-91-1103) March 2002
- Roberts, M. “Benefits and Challenges of Variable Compression Ratio (VCR)” SAE Technical Papers, ( 2003-01-0398 ) March 2003
- Hountalas, D. Zannis, T. Mavropoulos G. “Potential Benefits in Heavy Duty Diesel Engine Performance and Emissions from the Use of Variable Compression Ratio” SAE Technical Papers, ( 2006-01-0081 ) April 2006
- Pischinger, S. Yapici, K. I. Schwaderlapp, M. Habermann, K. “Variable Compression in SI Engines” SAE Technical Paper, ( 2001-24-0050 ) September 2001
- Mendler, C. Gravel, R. “Variable Compression Ratio Engine” SAE Technical Papers, ( 2002-01-1940 ) June 2002
- Larsen, G. J. “Research Engine for Evaluating the Effects of Variable Compression Ratio (VCR) And/Or Variable Valve Timing (VVT)” SAE Technical Paper, ( 910053 ) February 1991
- Drangel, H. Reinmann, R. Olofsson, E. “The Variable Compression (SVC) and the Combustion Control (SCC) - Two Ways to Improve Fuel Economy and Still Comply With World-Wide Emission Requirements” SAE Technical Papers, ( 2002-01-0996 ) March 2002
- Moteki, K. ET al. “A Study of a Variable Compression Ratio System With a Multi-Link Mechanism” SAE Technical Papers, ( 2003-01-0921 ) March 2003
- Rabhi, V. Beroff, J. Dionnet, F. “Study of a Gear-Based Variable Compression Ratio Engine” SAE Technical Papers, ( 2004-01-2931 ) October 2004
- Rabhi, D. Rabhi, V. Ranson, P. “Gear Design and Dimensioning Study for a Variable Compression Ratio Engine” SAE Technical apers, ( 2005-01-3131 ) July 2005
- Klein, M. Eriksson, L. “Methods for Cylinder Pressure Based Compression Ratio Estimation” SAE Technical Papers, ( 2006-01-0185 ) April 2006
- Kuo, P. S. “Cylinder pressure in a spark-ignition engine: A computational model” Journal Undergrad. Science 3 141 145 1996
- Eriksson, L. Andersson I. “An analytic model for cylinder pressure in a four stroke SI engine” SAE Technical Paper, 111( 2002-01-0371 ) 726 733
- MCE-5 Development S.A. “VCR strategy: Experiments, results, prospects” April 2009 http://www.mce-5.com/vcr_strategy/experimentsResults_prosp.htm
- MCE-5 Development S.A. “Fuel consumption reduction potential”l December 2008 http://www.mce-5.com/vcr_strategy/index.htm
- Nilsson, Y. “Cylinder volume function for SVC engines” Technical report Linköping University, Department of Electrical Engineering Sweden 2001
- Heywood, J. B. “Internal Combustion Fundamentals” New York McGraw-Hill, Inc. 1988