Superheated urea injection for aftertreatment applications
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United States of America Patent
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Issued Date -
May 31, 2007
app pub date -
Nov 29, 2005
filing date -
Nov 29, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An urea SCR system for enhancing internal combustion engine aftertreatment applications includes a supply tank containing aqueous urea, a delivery pump operatively connected to the supply tank and configured for elevating the pressure of aqueous urea drawn from said supply tank. The urea SCR system further includes a conduit arrangement connecting the delivery pump to an injection nozzle which is positioned adjacent an exhaust stream, the conduit arrangement being configured for the delivery of aqueous urea to the injection nozzle. Downstream of the delivery pump and upstream from the injection nozzle, a heating element is positioned for preheating of the aqueous urea to a superheated condition prior to injection into the exhaust stream.
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