Control valve arrangement
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United States of America Patent
Stats
-
Dec 18, 2012
Grant Date -
Jul 2, 2009
app pub date -
Mar 15, 2007
filing date -
Mar 15, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control valve, for use in controlling fuel pressure within a control chamber, comprises a control valve member, first flow restriction and second flow restriction. The control valve member is movable between a first position, and a second position. The first flow restriction is arranged to maintain a first pressure upstream of the first flow restriction when the control valve member is in transition between the first position and the second position. The second flow restriction is positioned downstream of the first flow restriction and is arranged to maintain a second pressure upstream of the second flow restriction. The second flow restriction is dimensioned and located relative to the first flow restriction such that in transition between the first and second positions the net force exerted on the control valve member by the first pressure balances the net force exerted on the control valve member by the second pressure.
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Cited Art Landscape
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