Upstream collimator for electrically heatable catalytic converter
First Claim
1. An electrically heatable catalytic converter comprising (a) a corrugated thin metal polycellular monolith, said monolith having an upstream gas intercepting face, a plurality of gas transmitting cells opening in said face, and a catalyst deposited on the gas contacting surfaces of said cells, and (b) a porous ceramic disk collimator for said exhaust gas stream having gas transmitting openings of from 0.01" to 0.15" in diameter, said collimator being axially spaced upstream of said gas intercepting face, whereby the gas flow is straightened and subdivided prior to entry into the corrugated thin metal polycellular monolith.
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Accused Products
Abstract
There is provided an improved electrically heatable catalytic converter formed of an electrically heatable corrugated thin metal monolith and having a collimator axially spaced upstream of the electrically heatable monolith, said collimator having the purpose of straightening and subdividing the gas flow to minimize the tendency of the leading edges of the corrugated thin metal monolith to be folded over in use.
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Citations
4 Claims
- 1. An electrically heatable catalytic converter comprising (a) a corrugated thin metal polycellular monolith, said monolith having an upstream gas intercepting face, a plurality of gas transmitting cells opening in said face, and a catalyst deposited on the gas contacting surfaces of said cells, and (b) a porous ceramic disk collimator for said exhaust gas stream having gas transmitting openings of from 0.01" to 0.15" in diameter, said collimator being axially spaced upstream of said gas intercepting face, whereby the gas flow is straightened and subdivided prior to entry into the corrugated thin metal polycellular monolith.
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4. An electrically heatable catalytic converter for treating exhaust gas emanating from an internal combustion engine to remove pollutant materials therefrom, said converter including (1) an outer metallic shell, (2) means at each end of said shell for adapting the configuration of the outer metallic shell for insertion into a conventional exhaust system for said internal combustion engine, (3) an insulating liner for the inner walls of said outer shell, (4) a core for said converter within said insulating liner including (5) a porous ceramic disk collimator having gas transmitting openings of from 0.01" to 0.15" in diameter, and axially spaced therefrom, (6) a core member comprising (a) at least one nonnesting corrugated thin stainless steel foil strip spirally wound about (b) an electrically conducting central metal post, and (c) a retaining shell tightly surrounding said core member and being electrically bonded thereto, (7) means for connecting said central post to one pole of a direct current voltage source, (8) means for connecting said retaining shell to the other pole of a direct current voltage source, and (9) a direct current voltage source rated at from 12 to 108 volts.
Specification