Fuel system
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United States of America Patent
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Feb 5, 2013
Grant Date -
Jun 24, 2010
app pub date -
Dec 16, 2009
filing date -
Dec 18, 2008
priority date (Note) -
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Abstract
A fuel system is described that comprises a pressure raising and shut-off valve (PRSOV), and a control valve arrangement operable to control a fuel pressure applied to a part of the PRSOV urging the PRSOV towards a closed position, wherein the control valve arrangement is supplied with fuel at a pressure controlled by a variable fluid pressure potentiometer network including a variable flow restrictor which is variable in response to changes in the position occupied by the PRSOV.
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