FUEL METERING DEVICE ESPECIALLY FOR THE COMBUSTION CHAMBER OF AN AEROJET ENGINE

摘要

A fuel metering device comprises a metering needle guided cantilever fashion in a bore and operated by a double-acting actuator so as to regulate the passage cross-section of a regulating aperture which determines the flow rate under pressure of a fuel containing or possibly containing solid impurities. The control consists of a piston integral with a shaft of the needle and sliding inside a cylinder, and the bore is made through a partition separating this cylinder from a chamber receiving the regulated fuel flowing out of the regulating aperture. The two chambers of the cylinder are fed, at modulated pressures, with filtered fuel, and the bore is provided with an annular groove which is fed with fuel taken through a filter upstream of the metering device.