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Stratified-Charge Engine Fuel Economy and Emission Characteristics
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English
Abstract
Data from two engines with distinct stratified-charge combustion systems are presented. One uses an air-forced injection system with a bowl-in-piston combustion chamber. The other is a liquid-only, high-pressure injection system which uses fluid dynamics coupled with a shaped piston to achieve stratification. The fuel economy and emission characteristics were very similar despite significant hardware differences.
The contributions of indicated thermal efficiency, mechanical friction, and pumping work to fuel economy are investigated to elucidate where the efficiency gains exist and in which categories further improvements are possible. Emissions patterns and combustion phasing characteristics of stratified-charge combustion are also discussed.
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Authors
Citation
Brehob, D., Fleming, J., Haghgooie, M., and Stein, R., "Stratified-Charge Engine Fuel Economy and Emission Characteristics," SAE Technical Paper 982704, 1998, https://doi.org/10.4271/982704.Also In
References
- Anderson, R.W. Yang, J. Brehob, D.D. Vallance, J.K. Whiteaker, R.M. “Understanding the Thermodynamics of Direct Injection Spark Ignition (DISI) Combustion Systems: An Analytical and Experimental Investigation,” SAE Paper 962018 1996
- Bishop, I.N. Simko, A. “A New Concept of Stratified Charge Combustion --- the Ford Combustion Process (FCP),” SAE Paper 680041 1968
- Brehob, D.D. “Model Comparisons of the Effect of Diluents on Spark-Ignition Engine Efficiency,” Joint Technical Meeting of the Western and Central States Section of the Combustion Institute San Antonio, TX 1995
- Heywood, J.B. Internal Combustion Engines McGraw-Hill, Inc. 1988
- Iwamoto, Y. Noma, K. Nakayama, O. Yamauchi, T. Ando, H. “Development of Gasoline Direct Injection Engine,” SAE Paper 970541 1997
- Miyake, M. Okada, S. Kawahara, Y. Asai, K. “A New Stratified Charge Combustion System (MCP) for Reducing Exhaust Emissions,” Combustion Science and Technology 12 29 46 1976
- Rassweiler, G.M. Withrow, L. “Motion Pictures of Engine Flames Correlated with Pressure Cards,” SAE Transactions 83 185 204 1938 SAE Paper 800131 1980
- Salters, D. Williams, P. Greig, A. Brehob, D. “Fuel Spray Characterisation Within an Optically Accessed Gasoline Direct Injection Engine Using a CCD Imaging System,” SAE Paper 961149 1996
- Simko, A.J. Choma, M.A. Repko, L.L. “Exhaust Emissions Control by the Ford Programmed Combustion Process - PROCO,” SAE Paper 720052 1972
- Taylor, C.F. The Internal-Combustion Engine in Theory and Practice, Volume 1: Thermodynamics, Fluid Flow, Performance Second Ed. The M.I.T. Press 1985