Emissions Control System Having External Turbocharger Wastegate and Integrated Oxidation Catalyst
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United States of America Patent
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Issued Date -
Jan 20, 2011
app pub date -
Jul 14, 2009
filing date -
Jul 14, 2009
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Abandoned
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Abstract
A method and system for reducing undesired exhaust emissions during cold start of a turbocharger-equipped internal combustion engine. A bypass line in the engine compartment has a bypass valve that permits exhaust to be bypassed around the turbocharger's turbine during cold start. An oxidation catalyst is closely coupled to the bypass valve.
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