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Energy Conservation with Increased Compression Ratio and Electronic Knock Control
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English
Abstract
Previous investigations have shown that fuel economy gains are possible in vehicles with increased compression ratio engines that meet 1978 Federal emission standards using oxidizing converter-EGR emission control systems. There has been no incentive to raise compression ratios, however, since the vehicle gains are offset by energy losses in the refinery due to refining the higher octane unleaded fuel required by high compression ratio engines. This paper discusses the application of an electronic closed loop knock control system to a higher compression ratio engine to allow operation on 91 Research Octane Number fuel. Two cars with different compression ratios are compared with both oxidizing converter - EGR and 3-way oxidizing-reducing converter-EGR closed loop carburetor emission control systems.
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Citation
Currie, J., Grossman, D., and Gumbleton, J., "Energy Conservation with Increased Compression Ratio and Electronic Knock Control," SAE Technical Paper 790173, 1979, https://doi.org/10.4271/790173.Also In
References
- Gumbleton J. J. Niepoth G. W. Currie J. H. “Effect of Energy and Emission Constraints on Compression Ratio” SAE October 1976
- Wallace T. F. “Buick's Turbocharged V-6 Powertrain for 1978” SAE March 1978
- Federal Register “Certification and Test Procedures” 40 27590 June 30 1975
- U.S. Department of Transportation and Environmental Protection Agency “Potential for Motor Vehicle Fuel Economy Improvement, Report to Congress” October 24 1974 17
- Kruse R. E. Huls T. A. “Development of the Federal Urban Driving Schedule” SAE May 1973
- Austin T. C. Hellman K. H. Paulsell C. D. “Passenger Car Fuel Economy During Non-Urban Driving” SAE August 1974
- “Fuel Economy Measurement - Road Test Procedures” SAE J1082 April 1974