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Technical Briefs

Optimization of the Flow in the Catalytic Converter of Internal Combustion Engines by Means of Screens

[+] Author and Article Information
Eduardo M. Arantes

Departamento de Engenharia Mecânica, Pontifícia Universidade Católica de Minas Gerais, Avenida Dom José Gaspar, 500 Belo Horizonte, 30535-610 Minas Gerais, Brazilemuriloarantes@ig.com.br

Marcello A. Medeiros

Departamento de Engenharia de Materiais, Aeronáutica e Automobilística, Escola de Engenharia de São Carlos, Universidade de São Paulo, Avenida Trabalhador Sancarlense, 400 São Carlos, 13566-590 São Paulo, Brazilmarcello@sc.usp.br

J. Eng. Gas Turbines Power 130(5), 054504 (Jun 19, 2008) (5 pages) doi:10.1115/1.2770492 History: Received March 28, 2006; Revised April 17, 2007; Published June 19, 2008

The flow in the automotive catalytic converter is, in general, not uniform. This significantly affects cost, service life, and performance, in particular, during cold startup. The current paper reports on a device that provided a large improvement in flow uniformity. The device is to be placed in the converter inlet diffuser and is constructed out of ordinary screens. It is cheap and easy to install. Moreover, the device does not present most of the undesired effects, such as increase in pressure drop and time to light off, often observed in other devices developed for the same purpose.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Velocity profiles at the honeycomb exit for various flow rates without the use of screens

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Figure 2

Velocity profiles at the honeycomb exit for various flow rates with the use of one screen in the inlet diffuser

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Figure 3

Velocity profiles at the honeycomb exit for various flow rates with the use of two screens in the inlet diffuser

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Figure 4

Diffuser inlet pressure as a function of flow rate for different screen combinations

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