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US 6,745,562 B2Granted
Diverter for catalytic converter
AssigneeKleenAir Systems, Inc.
InventorsLester Berriman, John Zabsky
Life of this patent
Estimating the term…
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AssigneeKleenAir Systems, Inc.
InventorsLester Berriman, John Zabsky
Estimating the term…
A diverter (60) is provided, which is of low cost and which is effective in more evenly distributing exhaust gasses passing from a small diameter upstream exhaust gas pipe section (42) into a much larger diameter catalytic converter assembly (20). The diverter includes a diverter element (70) and mounting brackets (72). The diverter element has a central hole (82) and has conical walls with an included angle of at least 70°, the conical walls having a plurality of holes (90). The large conical angle (G) of the diverter effectively directs exhaust gases to the periphery of the large diameter catalytic converter but blocks a radially intermediate portion of the catalyst, while the holes in the conical diverter walls allow sufficient exhaust gases to reach the radially intermediate portion of the catalyst.
In an engine which includes an exhaust conduit assembly with a catalytic converter-holding pipe section for holding a largely cylindrical mass of catalytic converter material having an axis, said mass having an axial portion lying close to said axis, a peripheral portion lying furthest from the axis, and a radially intermediate portion lying radially between said axial and peripheral portions, said exhaust conduit assembly including an upstream pipe section of smaller diameter than said converter holding pipe section, and an upstream transition assembly connecting said upstream pipe section to said converter-holding pipe section, wherein said transition assembly includes a conical outer transition pipe section that expands in a down stream direction and a diverter lying within said transition pipe section for more evenly distributing exhaust gas flowing into said largely cylindrical mass of catalytic converter material, said diverter having conical diverter walls that expand in a downstream direction and that are spaced from said conical outer transition pipe section, said diverter also having a central hole, the improvement wherein:
A diverter for placement in an upstream conical outer transition pipe section that connects a small diameter pipe section to a larger diameter catalytic converter-holding pipe section, compromising:
A combination of an upstream conical outer transition pipe section with an axis and with a large diameter end that leads to catalytic material in a catalytic converter-holding pipe section, and a diverter that lies within said transition pipe section, said outer transition pipe section diverging at a first divergence angle wherein:
Dependencies are inferred from the claim text.