Fluid flow valve and fluid flow system
AssigneeLucas Industries Limited
InventorsGlyn Edward Dixon, Trevor Stanley Smith
Life of this patent
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Abstract
A fluid flow system for supplying fuel to an engine, the system including a fluid flow valve having a valve element movable alternatively to a first operative position in which a relatively low fluid flow rate is permitted through the valve, for achieving a normal gradual shut-off of fuel supply, and a second operative position in which a relatively high fluid flow rate is permitted through the valve, for achieving a rapid emergency shut-off of fuel supply. Also disclosed is a fluid flow valve for use in the system. The invention has application in aircraft gas turbine engines.
Claims9
A fluid flow system operable to supply fuel to an engine, the system including a fluid flow valve comprising a valve element movable alternatively to a first operative position in which a relatively low fluid flow rate is permitted through the valve along a restricted flow path so as to achieve a normal gradual shut-off of fuel supply, and a second operative position in which a relatively high fluid flow rate is permitted through the valve along a less restricted flow path so as to achieve a rapid emergency shut-off of fuel supply, wherein fluid flow is selectively permitted through the valve along a first respective one of said restricted and less restricted flow paths connecting a high pressure fluid source to a servo chamber of a shut-off valve, and a second respective one of said restricted and less restricted flow paths connecting a servo chamber of a spill valve to a low pressure region.
Dependencies are inferred from the claim text.