Inverse aspects of the three-way catalytic converter operation in the spark ignition engine

• Autorzy: Żmudka Z. , Postrzednik S.
• Języki publikacji: EN

Abstrakty

EN

There are two sides of the catalyst operation: favourable and adverse. The positive side can be expressed by a conversion rate of harmful substances which is the principal parameter of catalyst work in respect of ecology. However, resistance of exhaust gas flow through the catalytic converter is also an essential problem. This is just the negative, adverse side of the converter operation. The catalytic converter can be treated as a local or linear resistance element of exhaust system. The first model, in which flow resistance generated by a catalyst is treated as local resistance, is more simplified. It is especially useful in case, when detailed constructional data of converter are unknown and the analysis of flow resistances in exhaust system is necessary. The basic measured quantity of flow resistance is pressure drop of exhaust gas within the catalyst. Next, on the basis of taken measurements also resistance number for the tested catalyst is calculated and analysed. Resistance number of the converter is calculated using Darcy model. In the second case, exhaust gas flow resistance through catalyst is treated as linear resistance with energy dissipation (linear frictional resistance) distributed linearly along way of exhaust gas flow. Friction number for the tested converter is calculated and analysed. The problem has been illustrated by the results of experimental researches of the three-way catalytic converter installed in the exhaust system of the spark ignition engine.

Słowa kluczowe

EN

catalytic converter; conversion rate; flow resistance; local resistance number; friction number

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 2
• Strony: 509--516
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Żmudka Z.

autor

Postrzednik S.

• Silesian University of Technology, Institute of Thermal Technology Konarskiego Street 18, 44-100 Gliwice, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Ebener, S., Zink, U., Ceramic Catalyst Supports and Particulate Filters for Diesel Engine Exhaust Aftertreatment, Journal of KONES, Vol. 7, No. 1–2, 2006.
• [2] Garrett, T. K., Automotive Fuels and Fuel Systems, Vol.1, Pentech Press, London 1991.
• [3] Konstandopolous, A., Johnson, J.H., Wall-Flow Diesel Particulate Filter – Their Pressure Drop and Collection Efficiency, SAE Paper No. 890405, 1989.
• [4] Leyrer, W., et al., Advanced Studies on Diesel Aftertreatment Catalyst for Passenger Cars, SAE Paper No. 960133, 1996.
• [5] Masoudi, M., et al., Pressure Drop of Ceramic Wall Flow Diesel Particulate Filter, Journal of KONES – Internal Combustion Engines, Vol. 5, No. 2, 2005.
• [6] Maus, W., Jumping the SULEV Hurdle with Cascades, Auto Technology, No. 2, 2001.
• [7] Opris, C., Johnson, J.H., A 2-D Computational Model Describing the Flow and Filtration Characteristics of a Ceramic Diesel Particulate Trap, SAE Paper No. 980545, 1998.
• [8] Postrzednik, S., Zmudka, Z., Solid Material Porosity and the Method of its Determination, Proceedings of the 29th International Symposium on Combustion, paper No. 4-10-1018, Hokkaido University, Sapporo, Japan 2002.
• [9] Postrzednik, S., Termodynamika zjawisk przepływowych, Wydawnictwo Politechniki Śląskiej, Gliwice 2006.
• [10] Postrzednik, S., Zmudka, Z., Termodynamiczne oraz ekologiczne uwarunkowania eksploatacji tłokowych silników spalinowych, Wydawnictwo Politechniki Śląskiej, Gliwice 2007.
• [11] Zmudka, Z., Postrzednik, S., Characteristics and Diminishing of Gaseous Emission from Diesel Engine, International Journal of Applied Thermodynamics, Vol. 3, No.1, pp. 43-48, 2000.