NATURAL GAS ENGINE AFTERTREATMENT SYSTEM
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United States of America Patent
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Issued Date -
Mar 19, 2015
app pub date -
Sep 16, 2013
filing date -
Sep 16, 2013
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Abandoned
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Abstract
Systems and methods for reducing methane in an aftertreatment system of a vehicle are described. An oxidation catalyst is disposed in an exhaust path between an engine block and a turbocharger. The oxidation catalyst stores methane in the exhaust gas from the engine block during low temperatures and oxidizes the stored methane during high temperatures. The temperatures at the oxidation catalyst are controlled, in part, by operating engine cycles and/or a back pressure valve that can adjust pressure in the exhaust path and/or increase engine load.
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