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Compression Ratio Optimization in a Direct-Injection Diesel Engine: A Mathematical Model
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1988 by SAE International in United States
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This paper describes the development and results of a mathematical model for a single cylinder, naturally-aspirated, direct-injection diesel engine, used to study the effect of compression ratio on the different performance parameters. The parameters investigated include; thermal and mechanical efficiency, ignition delay, mean effective pressure, maximum cylinder pressure, mechanical friction, and blowby. The model simulates a full thermodynamic cycle and considers the intake and exhaust processes, instantaneous heat transfer, instantaneous friction, and instantaneous blowby. Based on the model results, a prediction of an optimum CR for the engine is made.
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CitationGardner, T. and Henein, N., "Compression Ratio Optimization in a Direct-Injection Diesel Engine: A Mathematical Model," SAE Technical Paper 880427, 1988, https://doi.org/10.4271/880427.
- Wallace W.A. and Lux, F.B. “A Variable Compression Ratio Engine Development”, SAE Paper No. 762A, 1976.
- Austin A.E.W. and Lyn, W.T. “Some investigations on Cold-Starting Phenomena in Diesel Engines”, Proc. Inst. Mech. Engrs., pp.111– 123, 1959–60.
- Phatak, R. and Nakamura, T. “Cold Start-ability of Open-Chamber Direct-Injection Diesel Engines - Part I: Measurement Technique and Effects of Compression Ratio”, SAE Paper No. 831335, 1983.
- Gardner T.P. and Henein, K.A. “Diesel Engine Starting: A Mathematical Model”, SAE Paper No. 88####, 1988.
- Gardner, T.P. “Optimization of Compression Ratio in Compression Ignition Engines”, Ph.D Thesis, Mechanical Engineering Department, Wayne State University, Detroit, Michigan, 1987.
- Krieger R.B. and Borman, G. L. “The Computation of Apparent Heat Release for Internal Combustion Engines”, ASME Paper No. 66 WA/DGP-4, 1964.
- Marzouk, M. “Simulation of Turbocharged Diesel Engines Under Transient Conditions”, Ph.D Thesis, University of London (Imperial College), 1976.
- Malchow G.L., Sorenson S.C., and Buckius R. O., “Heat Transfer in the Straight Section of an Exhaust Port of a Spark Ignition Engine”, SAE Paper No. 790309, 1979.
- Watson N. and Pilley, A. D. “A Combustion Correlation for Diesel Engine Simulation”, SAE Paper No. 80029, 1960.
- Hardenberg H.O. and Hase, F.W. “An Empirical Formula for Computing the Pressure Rise Delay of a Fuel From its Cetane Number and from Relevant Parameters of Direct-Injection Diesel Engines”, SAE Paper No. 790493.
- Rezeka S.F. and Henein, N. A. “A New Approach to Evaluate Instantaneous Friction and its Components in Internal Combustion Engines”, SAE Paper No. 840179, 1984.
- Ting, L.L. and Mayer, J.E. “Piston Ring Lubrication and Cylinder Bore Wear Analysis”, Part I-Theory”, Journal of Lubrication Technology, July 1974, pp.305–314.
- Powell, H.N. “Application of an Enthalpy-Fuel/Air Ratio Diagram to ‘First Law’ Combustion Problems”, ASHE Trans., 79, 5, 1957.
- Benson, R.S. “A Comprehensive Digital Computer Program to Simulate A Compression Ignition Engine Including Intake and Exhaust Systems”, SAE Paper No. 710173, 1971.
- Furahama S., and Tada T., “On the Flow of the Gas Through the Piston-Rings”, JSME, Bulletin, Vol. 4, No. 16. 1961.
- Hohenberg, G.F. “Advanced Approaches For Heat Transfer Calculations”, SAE Paper No. 790825, 1979.
- Carnahan, B. Luther, H.A. and Wilkes, J.O. “Applied Numerical Methods”, John Wiley & Sons, Inc., New York, 1969, pp. 341–400.
- Watson, N. “Transient Performance Simulation and Analysis of Turbocharged Diesel Engines”,SAE Paper No. 810338, 1981.
- Borman, G.L. “Mathematical Simulation of Internal Combustion Engine Processes and Performance Including Comparisons with Experiment”, Ph.D. Thesis, Mechanical Engineering Dept., University of Wisconsin, 1964.
- Rezeka, S.F. “A Mathematical Model of Reciprocating Combustion Engine Dynamics for the Diagnosis of Deficient Energy Conversion”, Ph.D Thesis, Mechanical Engineering Department, Wayne State University, Detroit, Michigan, 1984.
- Lichty, L.C. “Internal Combustion Engines”, McGraw-Hill Book Company, New York, pp.389–395, Copyright 1951.
- Weber H.G. and Borman, G.L. “Parametric Studies Using a Mathematically Simulated Diesel Engine Cycle”, SAE Paper No. 670480, 1968.
- Newhall H.K. and Starkman, E.S. “Thermodynamic Properties of Octane and Air for Engine Performance Calculations”, SAE Paper No. 633G, 1963.