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Lowering of exhaust emission in modern two - stroke engine

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In the article the results of experimental tests carried out on the modified SI two-stroke experimental combustion engine with direct fuel injection system and the prototype of the oxidizing catalytic converter are presented. Volumetric exhaust emissions of the most important chemical components are many times smaller than standard limits of gaseous emissions given by EU directive for the new stationary engines applied in non-road vehicles and machines Spark ignition two-stroke engine fitted with a catalytic reactor is characterized by high temperature of exhaust gases, which the energy may be used in cogeneration systems. The paper presents the test stand, volumetric concentration of the main components of exhaust gases, results of converted emissions and fuel consumption as a function of air excess coefficient at chosen rotational speeds together with the assessment of the test results. There is decreasing of CO and HC emission during increasing of air excess coefficient and a strong increase of CO2 behind the catalytic converter. Application of catalytic converter in the outflow system together with direct fuel injection of the tested two-stroke engine enables to achieve values of exhaust emission of main toxic chemical components close to automobile four stroke engines. The paper presents also the comparison of exhaust gas emission of this engine with other engines equipped with different fuelling systems. Presented work is the successor of a wide range of research work in the field of development of modern two-stroke engines carried out in the Cracow University of Technology.
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  • Cracow University of Technology Institute of Automobiles and Internal Combustion Engines Jana Pawła II 37, 31-864 Krakow, Poland tel.: +48 12 6282692, fax: +48 12 6283690, wmitanie@usk.pk.edu.pl
Bibliografia
  • [1] Bell, G., Finnuci, C., Exhaust Emissions Sensitivities with Direct Injection on a 50 cc Scooter, SAE Paper 970365, Warrendale 1997.
  • [2] Bielaczyc, P., Merkisz, J., Pielecha J., Stan cieplny silnika spalinowego a emisja związków szkodliwych, Wydawnictwo Politechniki Poznańskiej, Poznań 2001.
  • [3] Coplin, N., Application of Air Assisted Direct Injection to High Performance Sport Motorcycles, Orbital Engine Corp. Ltd, 1996.
  • [4] Durett, P., Venturi, S., The IAPAC Fluid Dynamically Controlled Automotive Two-Stroke Combustion Process, A New Generation of Two-Stroke Engines for the Future?, International Seminar, Rueil-Malmaison, ISBN 2-7108-0654-1, 1993
  • [5] Directive 2002/88/WE of European Parliament, December 9th, 2002 .
  • [6] Merkisz, J., Ekologiczne problemy silników spalinowych, Wydawnictwo Politechniki Poznańskiej, T. I, Poznań 1998, Tom II, Poznań 1999.
  • [7] Mitianiec, W., Pneumatyczny system zasilania silników dwusuwowego o zapłonie iskrowym, Wydawnictwo Politechniki Krakowskiej, Kraków 2005.
  • [8] Mitianiec, W., Wtrysk paliwa w silnikach dwusuwowych małej mocy, PAN, Kraków 1999.
  • [9] Mitianiec, W., Forma, M,. Formation of Fuel Mixture in a SI Two-Stroke Engine with Direct Fuel Injection, Journal of KONES Powertrain and Transport, PAN, Vol. 15, No. 2, pp. 329 337, Warszawa 2008.
  • [10] Mitianiec, W., Influence of location of catalytic converter on two-stroke engine performance, SAE Paper 2001 01 1820/4241, SETC Pisa, 2001.
  • [11] Nuti, M., Pardini, R., Caponi, D., FAST Injection System: PIAGGIO Solution for ULEV 2T SI Engines, SAE 970362, SAE International Congress & Exposition, Detroit 1997.
  • [12] Suzuki, A., Goto, Y., Kawai, M., Development of a Catalytic Exhaust System for a Two- Stroke Scooter Engine, SAE Paper 1999-01-3281/JSAE 9938036, SETC Madison 1999.
  • [13] Worth, D., Coplin, N., McNiff, M., Stannard, M., Design Considerations for the Application of Air Assisted Direct In-Cylinder Injection Systems, SAE 972074, Small Engine Technology Conference, Yokohama 1997.
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Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ8-0019-0071
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