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Synchrothermal Reactor System for Control of Automotive Exhaust Emissions
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English
Abstract
An experimental “Synchrothermal” system with very low exhaust emission levels was developed based on duPont thermal exhaust manifold reactors. Rich fuel-air mixtures were used to decrease nitrogen oxides. Recirculation of a controlled amount of exhaust gas under selected operating conditions further decreased nitrogen oxides. Injections of air synchronized with individual exhaust valve opening promoted more complete combustion of hydrocarbons and carbon monoxide. Acceptable reactor temperatures under high-speed operation were maintained by diverting some of the injected air to the intake manifold. Muffler back pressure and a fixed recycle line proportioned the exhaust recycle which was injected between the carburetor venturi and the throttle plate. Recycle flow was blocked off during idle, wide open throttle and choked operation.
Composite exhaust emission levels below 0.3% carbon monoxide, 10 ppm unburned hydrocarbons and 150 ppm nitrogen oxides were obtained by the federal test procedure. Fuel consumption data indicating a fuel penalty of 16% were obtained from extended runs on a Mileage Accumulation Dynamometer. No attempts at obtaining system or component life data were made in these initial studies.
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Citation
Glass, W., Kim, D., and Kraus, B., "Synchrothermal Reactor System for Control of Automotive Exhaust Emissions," SAE Technical Paper 700147, 1970, https://doi.org/10.4271/700147.Also In
References
- Federal Register 31 61 March 1966
- Kopa R. D. Hollander B. R. Hollander F. H. Kimura H. “Combustion Temperature, Pressure and Products at Chemical Equilibrium.” SAE Progress in Technology 7 “Digital Calculations of Engine Cycles,” New York Society of Automotive Engineers, Inc. 1967
- Wimmer D. B. McReynolds L. A. “Nitrogen Oxides and Engine Combustion.” SAE Transactions 70 1962
- Kopa R. D. Kimura H. “Exhaust Gas Recirculation as a Method of Nitrogen Oxides Control in an Internal Combustion Engine.” 53rd Annual Meeting, Air Pollution Control Association May 1960
- Nichols J. E. El-Messiri I. A. Newhall H. K. “Inlet Manifold Water Injection for Control of Nitrogen Oxides.” Paper 690018 SAE Automotive Engineering Congress Detroit January 1969
- Benson J. D. “Reduction of Nitrogen Oxides in Automobile Exhaust.” Paper 690019 SAE Automotive Engineering Congress Detroit January 1969
- Newhall H. K. “Control of Nitrogen Oxides by Exhaust Recirculation.” SAE Transactions 76 1968 paper 670495
- Spindt R. S. “Air-Fuel Ratios from Exhaust Gas Analysis.” SAE Transactions 74 1966 paper 650507
- Daniel W. A. Wentworth J. T. “Exhaust Gas Hydrocarbon-Genesis and Exodus.” Paper 486B SAE Automobile Week Detroit March 1962
- Cantwell E. N. Rosenlund I. T. Barth W. J. Kinnear F. L. Ross S. W. “A Progress Report on the Development of Exhaust Manifold Reactors.” Paper 690139 SAE Automotive Engineering Congress Detroit January 1969
- Federal Register 33 108 June 1968
- Lewis O. G. Risher R. R. Wilson J. A. “An Eight Lane Dynamometer Highway.” Paper 69-U SAE Summer Meeting Atlantic City, N. J. June 1959