AIRCRAFT FUEL SYSTEM Russian patent published in 2020 - IPC B64D37/22 F16K17/36 

FIELD: aviation.

SUBSTANCE: invention relates to fuel supply systems in aircraft. Fuel system of aircraft comprises tank, fuel switching valve from fuel tank to engine, flow section with mesh air separator, pipelines (5) for fuel intake from the tank and system for draining working fluid from the hydraulic system into the fuel reservoir with a pressure constant pressure reduction valve. Valve for switching fuel intake from tank to engine is made in form of three-way slide valve (11), balanced in neutral position by means of springs (16, 17) and switched by control pressure of working fluid from hydraulic system, equal to adjusted pressure of reduction valve. Control pressure is supplied to three-way slide valve by movement of four-way slide (20) connecting hydraulically three-way valve (11) with communication of control pressure of working fluid from hydraulic system of AC. Movement of four-way spool (20) is ensured by load (26) in the form of a pendulum articulated and located along axis in flight direction with frame (27) having kinematic connection with four-way slide valve (20).

EFFECT: higher reliability of fuel system and continuous supply of engine with fuel in any positions of aircraft.

1 cl, 5 dwg