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Numerical Simulation for Parametric Study of a Two-Stroke Direct Injection Linear Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 06, 2002 by SAE International in United States
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Research at West Virginia University has led to the development of a novel crankless reciprocating internal combustion engine. This paper presents a time-based model used to investigate the performance of two-stroke direct injection compression ignition linear engines. The two-stroke linear engine consists of two pistons, linked by a connecting rod, that are allowed to move freely in response to changes in the engine's fueling and load across the full operating cycle of the engine. The computer model uses a combination of a series of dynamic and thermodynamic numerical equations, which have been solved to provide a detailed analysis of the two-stroke direct injection linear engine operation. Parameters such as rate of combustion, convection heat transferred inside the cylinders, friction forces, external loads, acceleration, velocity profile, compression ratio, and in-cylinder pressures were modeled. A detailed study was employed to predict the two-stroke direct injection linear engine behavior over a wide operating range, given intake parameters, variation in fuel to air ratio, reciprocating assembly mass, friction load, injection timing, and bore to stroke dimensions as some of the parameters used in the study. It was found that the operating frequency was relatively insensitive to reciprocating mass: for example, with other control variable fixed, a change in mass from 2kg to 7kg reduced frequency from 73Hz to 48Hz. Operating efficiency is also insensitive to most parameters, changing only 0.8% over a range of operating frequencies from 56Hz to 73Hz.
- Ehab Shoukry - Dept. of Mech. and Aerospace Engrg., West Virginia Univ.
- Samuel Taylor - Dept. of Mech. and Aerospace Engrg., West Virginia Univ.
- Nigel Clark - Dept. of Mech. and Aerospace Engrg., West Virginia Univ.
- Parviz Famouri - Lane Department of Computer Science and Electrical Engrg., West Virginia Univ.
CitationShoukry, E., Taylor, S., Clark, N., and Famouri, P., "Numerical Simulation for Parametric Study of a Two-Stroke Direct Injection Linear Engine," SAE Technical Paper 2002-01-1739, 2002, https://doi.org/10.4271/2002-01-1739.
- Heywood, J., “Internal Combustion Engine Fundamentals,” McGraw-Hill, 1988.
- Blair, G., “The Basic Design of Two-Stroke Engines”, SAE, 1990.
- Cleveland Diesel Engine Division, 1957, “History and Description of the Free-piston Engine-Gas Turbine Power,” (author unknown to GM).
- Underwood, A., “GMR 4-4 Hyprex Free-Piston Turbine Engine,” SAE Journal, 60-66, 1956.
- Frey, D., Klotsch, P., Egli, A., “The Automotive Free-Piston-Turbine Engine,” ASME Transactions, 65, 628-634, 1957.
- Galitello, K., “Two Stoke Cycle Engine,” U.S. Patent 4,876,991, October 31, 1989.
- Bock, R., “Gas Cushioned Free-piston Type Engine,” U.S. Patent 4,128,083, December 5,1978.
- Kos, J., “Free-Piston Engine Without Compressor,” U.S. Patent 4,924,956, May 15,1990.
- Widener, S., Ingram, K., “Free-piston Engine Linear Generator Technology Development,” Final report, Under Contact to US. Army TARDEC, Mobility Technology Center-Belvoir, Fort Belvoir, Virginia, January, 1995.
- Goldsborough, S., “A Numerical Investigation of a Two-Stroke Cycle, Hydrogen-Fueled, Free-piston Internal Combustion Engine,” Thesis, Colorado State University, 1998.
- Nandkumar, S., “Two-Stroke Linear Engine,” Masters Thesis, West Virginia University, 1998
- Clark, N., Nandkumar, S., Famouri, P., “Operation of a Small Bore Two-Stroke Linear Engine,” ASME 98-ICE-120, 1998.
- Clark, N., McDaniel, T., Atkinson, R., Nandkumar, S., Atkinson, C., Petreanu, S., Tennant, C., and Famouri, P., “Modeling and Development of a Linear Engine,” 1998 Spring Technical Conference, ASME ICE Division, Fort Lauderdale, FL, ICE-Vol. 30-2.
- Clark, N., Nandkumar, S., Atkinson, C., Atkinson, R., Petreanu, S., McDaniel, T., and Famouri, P., “Experimental Examination of a Small Bore Linear Two-Stroke Engine,” ASME Internal Combustion Engine Fall Conf., Clymer, NY, 1998, in Engine Design and Combustion.
- Tor, A., Johansen, O., Egeland, E., Johannessen, A., and Kvamsdal, R., “Free-Piston Diesel Engine Timing and Control Towards Electronic Cam- and Crankshaft,” IEEE Trans. Control Systems Technology, 2002
- Allais, E., “Free-Piston Engine With Operatively Independent Cam,” U.S. Patent 4,480,599, November 6, 1984.
- Deng, Y., Deng, K., “Free-Piston Engine Without Compressor,” U.S. Patent 4,924,956, May 15, 1990.
- Heintz, R., “Free-Piston Engine Pump,” U.S. Patent 4,369,021, January 8, 1983.
- Iliev, M. D., Kervanbashiev, S. D., Makednski, F. M., “Method and Apparatus for Producing Electrical Energy from a Cyclic Combustion Process Utilizing Coupled Pistons which Reciprocate in Unison,” U.S. Patent 4,532,431, July 30, 1985.
- Rittmaster, P. A., Booth J. L., “Hydraulic Engine,” U.S. Patent 4,326,380, April 27, 1982.
- Clark, N., Nandkumar, S., and Famouri, P., “Fundamental Analysis of a Linear Two-Stroke Internal Combustion Engine,” SAE 982692, 1998
- Atkinson, C., Petreanu, S., Clark, N., Atkinson, R., McDaniel, T., Nandkumar, S., and Famouri, P. “Numerical Simulation of a Two-Stroke Linear Engine-Alternator Combination,” SAE 990921, 1999.
- Petreanu S., “Conceptual Analysis of a Four-Stroke Linear Engine,” Dissertation, West Virginia University, 2000.
- Tor, A., Johansen, O., Egeland, E., Johannessen, A., and Kvamsdal, R., “Free-Piston Diesel Engine Dynamics and Control,” Norwegian University, 2001.
- Ramos, J. I., “Internal Combustion Engine Modeling,” Hemisphere Publishing Corporation, 1989.
- Singh, T., Surakomol, K., “Mathematical Modeling of Combustion Process in a Spark Ignition Engine,” SAE 790354, 1979.
- Reynolds, W. C., “Modeling of Fluid Motions in Engines - An Introductory Overview,” Symposium on Combustion Modeling in Reciprocating Engines, Plenum Press, 41-68, 1980.
- Westbrook, C. K., Dryer, F. L., “Chemical Kinetic Modeling of Combustion Processes,” Eighteenth Symposium (international) on Combustion, The Combustion Institute, 749-767, 1981.
- Westbrook C. K., Dryer, F. L., “Chemical Kinetic Modeling of Hydrocarbon Combustion,” Progress in Energy and Combustion Science, 10, 1-57, 1984.
- Borman, G., Nishiwaki, K., “Internal-Combustion Engine Heat Transfer,” Progress in Energy and Combustion Science, 13, 1-46, 1987.
- Olson, D. R., “Simulation of a Free-Piston Engine,” SAE 580267, 1958.
- Lucas, G. G., James, E. H., “A Computer Simulation of a Spark Ignition Engine,” SAE 730053, 1973.
- Benson, R. S., Baruah, P. C., “Simulation Model for a Crankcase-Compression Two-Stroke Spark Ignition Engine Including Intake and Exhaust Systems,” Proceedings of the Institution of Mechanical Engineers, 189, 167-175, 1975.
- Kishan, S., Bell, S. R., Caton, J. A., “Numerical Simulations of Two-Stroke Cycle Engines Using Coal Fuels,” Translations of the ASME, 108, 661-668, 1986.
- Baruah, P. C., “A Free-Piston Engine Hydraulic Pump for an Automotive Propulsion System,” SAE 880658, 1988.
- Korematsu, K., Hasegawa, M., “Total-System Simulation Model of Two-Stroke Cycle, Crank Case Compression-Type, Spark Ignition Engines,” Transactions of the JSME, 59, 1421-1426, 1993.
- Rosenberg, R., “General Friction Considerations for Engine Design”, SAE 821576, 1982
- Woschni, G. “A Universally Applicable Evaluation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,” SAE 670931, 1967.
- Wiebe, I., “Halbempirische Formel für die Verbrennungsgeschwindigkeit,” Verlag der Akademie der Wissenschaften der UdSSR, Moscow, 1956; as cited by G. Sitkei, Kraftstoffaufbereitung und Verbrennung bei Dieselmotoren, Springer-Verlag, Berlin, 156-159, (1964).