Method and apparatus for reducing exhaust gas including hydrocarbons during initial cold start period
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United States of America Patent
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Mar 1, 2011
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app pub date -
Apr 5, 2007
filing date -
Apr 25, 2006
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Abstract
Disclosed herein is a method and apparatus for reducing exhaust gases in an initial cold start period, in which a main catalyst unit is connected to an engine through an exhaust pipe, including the steps of receiving signals for stopping engine operation from an engine, and removing engine exhaust gases remaining in an exhaust pipe located at an inlet of a main catalyst unit.
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