This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental and Predictive Investigation of a Close Coupled Catalytic Converter with Pulsating Flow
Annotation ability available
Sector:
Language:
English
Abstract
The unsteady flow effects of a Close-Coupled Converter (CCC) are investigated. The aim is to improve the catalytic efficiency by uniformly utilizing the entire converter volume. Experimental and computational methods were used to evaluate the differences between unsteady and steady-state flow. Catalytic converters placed close to the engine have individual inflow pipes from each cylinder and suffer extreme filling and emptying processes. There is severe interaction of the pulsating exhaust flows. A wide range of engine operating points were studied at different engine speeds and load conditions. Also described is the influence of the gas pulsation on the conversion characteristics.
Recommended Content
Authors
Citation
Bressler, H., Rammoser, D., Neumaier, H., and Terres, F., "Experimental and Predictive Investigation of a Close Coupled Catalytic Converter with Pulsating Flow," SAE Technical Paper 960564, 1996, https://doi.org/10.4271/960564.Also In
References
- Howitt J.S. Sekella T.C. “Flow Effects in Monolith Honeycomb Automotive Catalytic Converters” SAE 740244
- Weltens H. Bressler H. Terres F. Neumaler H. Rammoser D. “Optimization of Catalytic Converter Gas Flow Distribution by CFD Prediction” SAE 930780
- Lai M.C. Kim J.-Y. Cheng C.Y. Li P. Chin G. Pakko J.D. “Three Dimensional Simulations of Automotive Catalytic Converter Internal Flow” SAE 910200
- Hockel K.G.L. Blödel-Pawlik J. Steinberg P. Waldmann G. MTZ-Motortechnische Zeitschrift 51 12 1990
- Farsch H.G. Fischer H. Fröhlich K. Mährle W. Rother H. MTZ-Motortechnische Zeitschrift 53 1 1992
- Hwang K. Lee K. Mueller J. Stuecken T. Schock H.J. Lee J.-Ch. “Dynamic Flow Study in a Catalytic Converter using Laser Doppler Velocimetry and High Speed Flow Visualization” SAE 950786
- Qu Zhao F. Li L. Xie X. Lai M. Ch. “An Experimental Study of the Flow Structure Inside the Catalytic Converter of a Gasoline Engine” SAE 950784
- Stanski I. Melcher T. Berthold J. MTZ-Motortechnische Zeitschrift 46 12 1985
- Seifert H. “A Mathematical Model for Simulation of Processes in an Internal Combustion Engine” Acta Astronautica 6 1361 1376 1979
- Baxendale A. “The Use of Computational Fluid Dynamics for Flow Diagnostics in Exhaust System Design and Development” 4th International Conference Florence ATA 1994