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Heat Insulation Methods for Manifold Mounted Converters
Technical Paper
2000-01-0215
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The introduction of the catalytic converter into the engine compartment has led to severe requirements for thermal insulation. The converter and the exhaust manifold constitute significant heat sources that increase the underhood air temperature and the direct radiation to surrounding components with limited heat tolerance.
In the present study, various methods of converter thermal insulation are investigated, and recommendations for minimizing heat transfer are presented. The basic heat transfer mechanisms from the converter are first reviewed to provide a basis for understanding the most effective means of insulation. Ceramic fiber insulation with various thermal conductivities are evaluated at several different thicknesses. This type of internal insulation, which is often used for catalytic converters, is compared to heat shielding. It is found more effective.
Experiment and/or simulation have been used to evaluate the various insulation methods. Simple one-dimensional heat transfer models have been used to support the experimental approach. These simple models have been found to be a very powerful tool for product design because they provide a means to quickly evaluate several competing scenarios.
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Authors
Citation
Zidat, S. and Parmentier, M., "Heat Insulation Methods for Manifold Mounted Converters," SAE Technical Paper 2000-01-0215, 2000, https://doi.org/10.4271/2000-01-0215.Also In
Advanced Catalysts Substrates and Advanced Converter Packaging
Number: SP-1532; Published: 2000-03-06
Number: SP-1532; Published: 2000-03-06
References
- Waltner H. et all “Development of close-coupled catalyst systems for European driving conditions” SAE 980663
- Oho E. et all “The development of BMW catalyst concepts for LEV/ULEV and EUIII/IV legislation -6-Cylinder engine with close-coupled main catalyst.” SAE 980418
- Glander D. Zidat S. “Modeling electrically heated converters” Automotive Engineering 76 106 1998
- Nunan J.G. Denison G.W. Williamson W.B. Henk M.G. “Characterization of OBDII features of advanced Pd/Rh catalysts and relation to catalyst composition and design” SAE 980675
- Taniguchi S. et all “New low-cost and high performance catalyst single layer Pd/Rh catalyst development”
- Kreith F. Bohn M.S. “Principles of Heat Transfer” 5th PWS Publishing Company 1997
- Bauer H. et all “Thermal Management of close-coupled catalysts” SAE 1999-01-1231