Exhaust aftertreatment device, including chemical mixing and acoustic effects
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United States of America Patent
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Apr 20, 2004
Issued Date -
N/A
app pub date -
Feb 27, 2002
filing date -
Oct 17, 2001
priority date (Note) -
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Abstract
An exhaust aftertreatment device (10) includes an aftertreatment element (24) for treating internal combustion engine exhaust, an injector (26) for injecting chemical species mixing with the exhaust prior to reaching the aftertreatment element, and a turbulator (36) turbulating the exhaust to enhance the noted mixing. In a desired combination, a two-stage integrated perforated tube combination structure includes a turbulent mixing tube (38) disposed in an acoustic tube (40) and concentrically surrounded thereby.
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