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An arrangement for a main fuel pump, a backup fuel pump, a main hydraulic pump, and a backup hydraulic pump, typically for a as turbine engine in an aircraft, includes an isolated fuel and hydraulic fluid system and a backup pumping arrangement employing two mechanically-coupled gear-type reversible

An arrangement for a main fuel pump, a backup fuel pump, a main hydraulic pump, and a backup hydraulic pump, typically for a as turbine engine in an aircraft, includes an isolated fuel and hydraulic fluid system and a backup pumping arrangement employing two mechanically-coupled gear-type reversible pump-motors and appropriate control valves.

대표청구항 ▼

A fluid circuit arrangement comprising: a combination apparatus for an internal combustion engine in a vehicle; at least one hydraulic valve for controlling the engine or the vehicle; a first source of a fuel; a second source of a fluid for the valve, the second source being isolated from the first

A fluid circuit arrangement comprising: a combination apparatus for an internal combustion engine in a vehicle; at least one hydraulic valve for controlling the engine or the vehicle; a first source of a fuel; a second source of a fluid for the valve, the second source being isolated from the first source; first means for pressurizing the fuel including a first path for leading the pressurized fluid to the combustion apparatus; second means for pressurizing the fuel while in the first path and while the fluid for the actuator has a pressure greater than a predetermined value, the second means including means for providing at least a part of the motive power for the first means while the pressure is above the predetermined value; and means for deriving at least a part of the motive power for the second means from the first means when the pressure of the fluid for the valve falls below the predetermined value and for changing the second means to counteract the fall in pressure of the fluid for the valve; and wherein the first and second pressurizing means are reversible pump-motors, and the means for deriving at least part of the motive power for the second pressurizing means from the first pressurizing means, comprises valve means for reversing the direction of fluid flow through the first pressurizing means, whereby some of the pressurized fuel flows there through; and means for providing a mechanical drive connection from the first pressurizing means when in the motor operating mode to the second pressurizing means when in the pump operating mode for pumping the fluid from the second source.