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Estimation of Hydrocarbon Oxidation by Measuring He Concentrations in an SI Engine Exhaust Port
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 Title & Authors
Estimation of Hydrocarbon Oxidation by Measuring He Concentrations in an SI Engine Exhaust Port
Yi, Hyung-Seung; Park, Jong-Bum; Min, Kyoung-Doug; Kim, Eung-Seo;
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In order to investigate the exhaust structure and secondary oxidation of unburned hydrocarbon (HC) in the exhaust port, concentrations of individual HC species were measured in exhaust process, the degree of oxidation were obtained. Using a solenoid-driven fast sampling system on single-cylinder research engine fueled with 94% propane, the profiles of unburned hydrocarbons (HCs) and non-fuel HCs with a propane fueled engine were obtained from several locations in the exhaust port during the exhaust process. The sampled gases were analyzed using a gas chromatography of HC species with 4 or lesser carbon atoms. The change of total HC concentration and HC fractions of major components through the exhaust port were discussed. The results showed that non-uniform distribution of HC concentration existed around the exhaust valve and changed with time, and that the exhaust gas exhibited nearly uniform concentration profile at port exit, which was due to mixing and oxidation. Also it could be known that bulk gas with relatively high HC concentration came out through the bottom of the exhaust valve. To estimate the mass-based degree of HC oxidation in the exhaust port from measured HC concentrations, a 3-zone diagnostic cycle simulation and plug flow modeling were used. The degree of oxidation ranged between 26 % and 36 % corresponding to the engine operation conditions
Hydrocarbon;Secondary Oxidation;Gas Sampling System;Gas Chromatography;Degree of Oxidation;
 Cited by
Heywood, J. B., 1988, Internal Combustion Engine Fundamentals, McGRAW-HILL, pp. 147-149, 601-619

Cheng, W. K., Hamrin, D., Heywood, J. B., Hochgreb, S., Min, K., and Norris, M., 1993, 'An Overview of Hydrocarbon Emissions Mechanisms in Spark-Ignition Engines,' SAE Paper No. 932708

Kayes, D. and Hochgreb, S., 1996, 'Development of a Time and Space Resolved Sampling Probe Diagnostic for Engine Exhaust Hydrocarbons,' SAE Paper No. 961002

Kayes, D. and Hochgreb, S., 1997, 'Time, Space, and Species Resolved Measurements of Engine-Out Hydrocarbon Emissions from Spark-Ignited Engines,' Combust. Sci. and Tech., Vol. 127, pp. 333-362

Sodre, J. R., Yates, D. A., 1997, 'Species and Time-resolved Measurements of Exhaust Hydrocarbons from a SI Engine,' SAE Paper No. 971016

Thompson, N. D. and Wallace, J. S., 1994, 'Effect of Operating Variables and Piston and Ring Parameters on Crevice Hydrocarbon Emissions,' SAE Paper No. 940480

Kaiser, E. W., Siegl, W. O., and Anderson, R. W., 1994, 'Fuel Structure and the Nature of Engine-Out Emissions,' SAE Paper No. 941960

Siegl, W. O., Richert, J. F. O., Jensen, T. E., Schuetzle, D., Swarin, S. J., Loo, J. F., Prostak, A., Nagy, D., and Schlenker, A. M., 1993, 'Improved Emissions Speciation Methodology for Phase II of the Auto/Oil Air Quality Improvement Research Program - Hydrocarbon and Oxygenates,' SAE Trans., Vol. 102, Paper No. 930142

Caton, J. A. and Heywood, J. B., 1980, 'Models for Heat Transfer, Mixing and Hydrocarbon Oxidation in a Exhaust Port of a Spark-Ignited Engine,' SAE Paper No. 800290

Lienesch, J. H., 1979., 'A Gas Exchange Submodel for the New, Single Cylinder General Motors Research Laboratories Engine Simulation Program,' G. M. research Report, EN-142