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Flame Photographs of Light-Load Combustion Point the Way To Reduction of Hydrocarbons in Exhaust Gas
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Abstract
AN investigation to determine why the hydrocarbon content of automobile exhaust gas increases abruptly during deceleration and how this can be prevented is described in this paper.
High-speed motion pictures of the flame, taken through a quartz-window cylinder head, show that residual-gas dilution is the major cause of incomplete combustion under these conditions.
The concentration of hydrocarbons in the exhaust can be reduced either by admitting extra air and fuel to the intake manifold to limit vacuum attained during deceleration or by shutting off the fuel during deceleration.
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Wentworth, J. and Daniel, W., "Flame Photographs of Light-Load Combustion Point the Way To Reduction of Hydrocarbons in Exhaust Gas," SAE Technical Paper 550281, 1955, https://doi.org/10.4271/550281.Also In
References
- Report of Test 668 Los Angeles County Air Pollution Control District 1953 “Atmospheric Pollution from Hydrocarbons in Automobile Exhaust Gases,” Viets, F. H. Fischer, G. I. Fudurich A. P.
- Proceedings of Second National Air Pollution Symposium September 1952 71 83 “Hydrocarbon Constituents of Automobile Exhaust Gases,” Magil, P. L. Hutchison, D. H. Stormes J. M.
- 591 601 “Some Effects of Engine-Fuel Variables on Exhaust-Gas Hydrocarbon Content,” Rounds, F. G. Bennett, P. A. Nebel G. J.
- SAE Quarterly Transactions Vol. 6 October 1952 666 676 “Improved System for Control and Measurement of Air Consumption of Single-Cylinder Engine,” Cornelius W. Caplan J. D.
- Bureau of Mines RI, No. 3871 April 1946 “Extinction of Gasoline Flames by Inert Gases,” Jones G. W. Gilliland W. R.
- Bureau of Mines RI, No. 3798 February 1945 “Inflammability of Natural Gas; Effect of Pressure upon Limits,” Jones G. W. Kennedy R. E.
- SAE Transactions Vol. 38 March 1936 90 96 “Relation of Exhaust-Gas Composition to Air/Fuel Ratio,” D'Alleva B. A. Lovell W. G.