NOX REDUCTION
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United States of America Patent
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Issued Date -
Mar 27, 2014
app pub date -
Sep 27, 2012
filing date -
Sep 27, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for improving NOx reduction by incorporating an upstream treatment housing having a dual functionality catalyst that includes a diesel oxidation catalyst and a three-way catalyst, and which is positioned upstream of a main exhaust gas treatment system. The upstream treatment housing is positioned in relative close proximity to an exhaust turbine to prevent or minimize a reduction in exhaust gas temperature as the exhaust gas travels between the outlet of the turbine and the upstream treatment housing. By preventing such a reduction in exhaust gas temperature, the three way catalyst in the upstream treatment housing may operate at exhaust gas temperatures higher than those in main exhaust gas treatment system, which may allow for NOx conversion in the upstream treatment housing during certain cold operating or ambient conditions that is not typically attained in the main treatment system during such conditions.
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