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.
Optimization of the Flow in the Catalytic Converter of Internal Combustion Engines by Means of Screens
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Arantes, E. M. R., and Medeiros, M. A. F. (June 19, 2008). "Optimization of the Flow in the Catalytic Converter of Internal Combustion Engines by Means of Screens." ASME. J. Eng. Gas Turbines Power. September 2008; 130(5): 054504. https://doi.org/10.1115/1.2770492
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