System and apparatus for controlling reverse flow in a fluid conduit
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United States of America Patent
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Jan 14, 2014
Grant Date -
Sep 29, 2011
app pub date -
Mar 27, 2010
filing date -
Mar 27, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A system includes an internal combustion engine receiving intake air from an intake manifold and providing exhaust gases to an exhaust manifold. The system further includes an exhaust gas recirculation (EGR) conduit fluidly coupling the exhaust manifold to the intake manifold. The system includes a conical spring check valve disposed in the EGR conduit, the conical spring check valve having a helically wound spring including a number of turns of decreasing diameter, where each turn progresses axially in a normal flow direction of the EGR from a previous one of the turns. Each of the turns further overlaps a previous one of the turns.
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