System and method for controlling a flow of vent gases to a natural gas engine
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United States of America Patent
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Jan 3, 2017
Grant Date -
Jun 25, 2015
app pub date -
Jul 24, 2014
filing date -
Dec 23, 2013
priority date (Note) -
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Abstract
A system and method controls a flow of vent gases to a combustion engine. The system includes an inlet for receiving the vent gases, a pressure relief device that enables the vent gases to escape to atmosphere when a pressure in the inlet exceeds a predetermined relief pressure, a flow-restricting orifice, and a back pressure regulator disposed downstream of the orifice. A shut-off valve disposed between the back pressure regulator and the air intake is set to only open when an intake pressure falls below a predetermined negative intake pressure.
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