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AssigneeSafran Aircraft Engines
InventorsJean-Marie Brocard, Régis Michel Paul Deldalle, Anne Marie Cécile Barreau, Pierre Charles Mouton
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A fuel metering unit comprising a movable element including at least one fuel flow section opening upstream towards a fuel supply duct and opening downstream towards a utilization duct through a metering slot with a flared profile having a narrow flow section and a wide flow section, the movable element able to be moved with respect to a stationary element between a low flow rate position and a high flow rate position, the metering slot made in the stationary element or in the movable element and its obstruction obtained by covering the slot with a wall of the movable element or of the stationary element.
A fuel metering unit able to operate under icing conditions of the fuel, comprising a movable element including at least one fuel flow section opening upstream towards a fuel supply duct and opening downstream towards a utilization duct through a metering slot with a flared profile having a narrow flow section and a wide flow section, the movable element being able to be moved relatively to a stationary element only over a predetermined stroke between a low flow rate position in which the metering slot is for a large part obstructed and a high flow rate position in which the metering slot is for a great part exposed, the metering slot being made in the stationary element or in the movable element and its obstruction being obtained by covering the slot with a wall of the movable element or of the stationary element, the metering unit being characterized in that it further includes obstruction means for obstructing at least partly the narrow flow section of the metering slot when the metering unit is in the high flow rate position, without ever obstructing the wide flow section of said metering slot.
Dependencies are inferred from the claim text.