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Simulation and Evaluation of a Variable Valve Timing Single Cylinder Spark Ignition Engine
Technical Paper
2005-01-0765
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A Comprehensive computer simulation model was developed for a single cylinder spark ignition engine to simulate the Compression, Combustion, Expansion, Exhaust and Intake processes including the heat losses through the cylinder walls. The gas exchange processes were simulated with the help of a finite difference scheme and a separate boundary condition was developed for the throttle action on a conventional carburetor. The model after validating with the experimental data was used to arrive at the optimum duration and lift of the intake valve corresponding to different throttle positions of the equivalent conventional engine. These optimum values were used in the design of a 3 dimensional cam. Based on this design a new variable valve timing engine (VVT) has been designed and developed. Comparison between the computed and experimental data for the VVT engine was observed to be satisfactory. It is anticipated that the present technique could pave the way for the design and development of a variable valve timing engine.
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Authors
- Farshid Fallahzadeh - Centre for Energy Studies, Indian Institute of Technology, India
- J. P. Subrahamanyam - Centre for Energy Studies, Indian Institute of Technology, India
- Vijay Sharma - Centre for Energy Studies, Indian Institute of Technology, India
- M. K. Gajendra Babu - Centre for Energy Studies, Indian Institute of Technology, India
Topic
Citation
Fallahzadeh, F., Subrahamanyam, J., Sharma, V., and Gajendra Babu, M., "Simulation and Evaluation of a Variable Valve Timing Single Cylinder Spark Ignition Engine," SAE Technical Paper 2005-01-0765, 2005, https://doi.org/10.4271/2005-01-0765.Also In
References
- Dresner, T. Barken, P. “A Review and classification of variable valve timing mechanism” SAE Paper 890674 1989
- Novak, J.M. Blumberg, P. “Parametric simulation of significant design and operating alternatives affecting the fuel economy and emissions of spark ignited engines” SAE Paper 780943 1989
- Babu Gajendra, M.K. Murthy, B.S. “Simulation and Evaluation of a single cylinder four stroke spark ignition engine” 163 Paper No. 750687 , SAE Transactions 1975
- Reddi Subba, K.S. Mathur, H.B. Gajendra Babu, M.K. “A Thermodynamic simulation model for a methanol fueled spark ignition engines.” SAE Paper No, 830333 1983
- Nuccio, P. “Variable Valve Timing as a means to control engine load” Proceedings of the 13 th FISITA Congress 71.1 71.6 1971
- Lenz, H.P. Wichart, K. Gruden, D. “Variable Valve Timing- A Possibility to Control Engine Load without Throttle” SAE Paper 880388 1988
- Elrods, A.C. Nelson, M.Y. “Development of Variable Valve Timed Engine to Eliminate Pumping Losses Associated with Throttled Operation” SAE Paper 860537 1986
- Stojek, D. Stwiorok, A. “Valve Timing with Variable Overlap Control” Proceedings of the 20 th FISITA Congress 2.8 2.14 1984
- Roe, G.E. “Variable Valve Timing Unit Suitable for Internal Combustion Engines” Proceedings of IME 186 23 72 310 306 1972
- Schiele, C.A. DeNagel, S.F. Bennethum, J.E. “Design and Development of a Variable Valve Timing (VVT) Camshaft” SAE Paper 740102 1974
- Ma, T.H. “Effect of Variable Valve Timing Engine on Fuel Economy” SAE Paper 880390 1988
- Kreuter, P. Schebitz, M. “Strategies to Iimprove SI engine Performance by means of Variable Intake Lift, Timing and Duration” SAE Paper 920449 1992
- Wichart, K. “Possibilities and Means for Reducing Pumping Losses in SI engine” Fortschritt-Berichte VDI VDI Verlag Düsseldorf 1987
- Freudenstein, F. Maki, E.R. Tsai, L.W. “The Synthesis and Analysis of Variable Valve Timing Mechanisms for Internal Combustion Engines” SAE Paper 8830387 1988
- Gray, C. “A Review of Variable Engine Valve Timing” SAE Paper 880386 1988
- Shiga, S. Morita, M. Yagi, S Matsumoto, T Effect of early closing of intake valve on the engine performance in a spark ignition engine SAE Paper 960585 1996
- Moro, D. Ponti, F. Serra, G. Thermodynamic analysis of variable valve timing influence on S.I. Engine efficiency SAE Paper 2001-01-0667 2001
- Soderberg, F. Johansson, B. Load control using late intake valve closing in a cross flow cylinder head 2001-01-3554
- Beham, M Yu, D.L. Modelling of a variable valve timing spark ignition engine using different neural net works Journal of Automobile Engineering October 2004 218 1159 1172
- Hong, H. Pravate-Patil, G.B Gordon B. Review and analysis of variable valve timing strategies - eight ways to approach Journal of Automobile Engineering October 2004 218 1179 120