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Effect of Energy and Emission Constraints on Compression Ratio
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English
Abstract
This paper describes the results of a study to evaluate the relationship of compression ratio on fuel energy conservation with the constraint of the 1977 Federal emission standards (1.5 HC, 15.0 CO and 2.0 NOx). The influence of the energy losses in the refinery process to produce higher octane fuels was considered as well as the effect of compression ratio on engine efficiency. Two different emission control systems were evaluated; a catalytic converter-EGR system and a manifold reactor-EGR system. These systems were evaluated on six vehicles; three intermediate size with 350 CID engines at compression ratios of 7.4, 8.3 and 9.2:1 and three sub-compact size with 151 CID engines at the same three compression ratios. Based upon total energy conservation, there does not appear to be an incentive for increasing unleaded or leaded fuel octane levels to allow for the use of higher compression ratios with converter-EGR or reactor-EGR control systems at the 1977 Federal emission standards. In addition, the catalytic converter-EGR system appears to provide equal to or improved energy utilization compared to the reactor-EGR control system.
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Citation
Gumbleton, J., Niepoth, G., and Currie, J., "Effect of Energy and Emission Constraints on Compression Ratio," SAE Technical Paper 760826, 1976, https://doi.org/10.4271/760826.Also In
References
- Morgan C. R. Hetrick S. S. “Trade-offs Between Engine Emission Control Variables, Fuel Economy and Octane” Paper 750415 SAE February 1975
- Marks C. Niepoth G. “Car Design for Economy and Emissions” Paper 750954 SAE October 1975
- Schweikert J. F. Gumbleton J. J. “Emission Control with Lean Mixtures” Paper 760226 SAE February 1976
- Federal Register “Certification and Test Procedures” 40 27590 June 30 1975
- Kruse R. E. Huls T. A. “Development of the Federal Urban Driving Schedule” Paper 730553 SAE May 1973
- Austin T. C. Hellman K. H. Paulsell C. D. “Passenger Car Fuel Economy During Non-Urban Driving” Paper 740592 SAE August 1974
- “Fuel Economy Measurement - Road Test Procedures” SAE J1082 April 1974
- “Research Technique for Determination of Octane Number Requirements of Passenger Cars” Coordinating Research Council September 1974
- Benson J. D. “Some Factors Which Affect Octane Requirement Increase” Paper 750933 SAE October 1975
- Gumbleton J. J. Bolton R. A. Lang H. W. “Optimizing Engine Parameters with Exhaust Gas Recirculation” Paper 740104 SAE March 1974
- U.S. Department of Transportation and Environmental Protection Agency “Potential for Motor Vehicle Fuel Economy Improvement, Report to Congress” October 24 1974 17
- Bettoney W. E. “Information on Fuel Economy of Recent Model U.S. Cars” DuPont Technical Memorandum August 1973
- Cantwell E. N. Blenk M. H. Stuckey R. A. Russell H. J. “Demographic and Engineering Factors Affecting Gasoline Utilization” Preprint No. 17-76 API May 1976
- Colyer C. C. “Factors Affecting Optimum Octane Determinations” Slide material from SAE Open Forum of Fuels and Lubricants Technical Committee Houston, Texas June 1975
- Tierney W. T. Johnson E. M. Crawford N. R. “Energy Conservation Optimization of the Vehicle-Fuel-Refinery System” Paper 750673 SAE June 1975
- Public Law 94-163 “Energy Policy and Conservation Act” December 22 1975