A fully-integrated flow-control module is designed to fit within a filler neck of a DEF tank that conforms to ISO (International Organization for Standardization) Standard 22241-4:2009(E). The flow-control module includes a breather cap that locks the flow-control module within the mouth of the ISO filler neck. A spring-biased valve piston, which is controlled by a bleed path within a bleed and float body, opens and closes to control fluid flow into the DEF tank. A fluid level float is mounted on a control rod. The control rod and a bleed valve poppet are rigidly secured to a connector beam. When fluid levels in the tank raise the float, the bleed valve poppet seals a bleed circuit escape port, thereby enabling the valve piston to close, increase fluid pressure at the nozzle, and cause the nozzle to shut off.

A tubular fuel filler pipe body is a blow molded body and is adapted to connect to a fuel tank at one end thereof. The fuel filler pipe body includes in an outer circumferential surface of another end side thereof an annular recessed groove. The fuel filler pipe body includes an opening of the other end thereof to which a nozzle guide is mounted. The nozzle guide includes on an one end side thereof an annular covering portion configured to cover annularly the outer circumferential surface of the other end side of the fuel filler pipe body. An annular rubber sealing member configured to seal between an inner circumferential surface of the annular recessed groove and an inner circumferential surface of the annular covering portion fits with the annular recessed groove.

A fuel system for an aircraft including a fuel tank for storing fuel during operation of the aircraft and a diffuser disposed inside the fuel tank. The diffuser is configured such that it forms part of a flow path configured to connect a fuel source to the inside of the fuel tank. The diffuser includes a wall which at least partially defines an internal space of the diffuser; an opening in the wall, which provides access to the internal space; and a blocking component configured to block the opening.

A fully-integrated flow-control module is designed to fit within a filler neck of a DEF tank that conforms to ISO (International Organization for Standardization) Standard 22241-4:2009(E). The flow-control module includes a breather cap that locks the flow-control module within the mouth of the ISO filler neck. A spring-biased valve piston, which is controlled by a bleed path within a bleed and float body, opens and closes to control fluid flow into the DEF tank. A fluid level float is mounted on a control rod. The control rod and a bleed valve poppet are rigidly secured to a connector beam. When fluid levels in the tank raise the float, the bleed valve poppet seals a bleed circuit escape port, thereby enabling the valve piston to close, increase fluid pressure at the nozzle, and cause the nozzle to shut off.

A tubular fuel filler pipe body is a blow molded body and is adapted to connect to a fuel tank at one end thereof. The fuel filler pipe body includes in an outer circumferential surface of another end side thereof an annular recessed groove. The fuel filler pipe body includes an opening of the other end thereof to which a nozzle guide is mounted. The nozzle guide includes on an one end side thereof an annular covering portion configured to cover annularly the outer circumferential surface of the other end side of the fuel filler pipe body. An annular rubber sealing member configured to seal between an inner circumferential surface of the annular recessed groove and an inner circumferential surface of the annular covering portion fits with the annular recessed groove.

Disclosed is an apparatus for controlling shut-off of a fuel gun in a filler pipe of a fuel tank which inhibits early shut-off of the fuel gun before the fuel tank is fully filled with fuel while refueling. The apparatus includes: a retainer mounted in a filler neck of the fuel tank; a partition disposed in a space between an inner circumferential surface of the filler neck and an outer circumferential surface of the retainer and having a fuel intake hole formed in a lower end of the partition; and an early shut-off prevention valve disposed in the partition. The early shut-off prevention valve closes the fuel intake hole before the fuel tank is fully filled with fuel, and opens the fuel intake hole by fuel flowing to the filler neck from the fuel tank when the fuel tank is fully filled with the fuel.

A tubular fuel filler pipe body is a blow molded body and is adapted to connect to a fuel tank at one end thereof. The fuel filler pipe body includes in an outer circumferential surface of another end side thereof an annular recessed groove. The fuel filler pipe body includes an opening of the other end thereof to which a nozzle guide is mounted. The nozzle guide includes on an one end side thereof an annular covering portion configured to cover annularly the outer circumferential surface of the other end side of the fuel filler pipe body. An annular rubber sealing member configured to seal between an inner circumferential surface of the annular recessed groove and an inner circumferential surface of the annular covering portion fits with the annular recessed groove.

To provide a fuel tank check valve making it easy to assemble a cap to a valve element housing. This fuel tank check valve has a body tube provided with a valve element housing, a valve element, a cap, and a spring, wherein the valve element housing has a base end side frame, a tip end side frame to which the cap is mounted, and a first coupling frame connecting the both frames, the tip end side frame is provided with a retraction portion having a shape in which a circumferential part is retracted from the tip end surface thereof to the base end side frame side, the cap is formed with a notch whose circumferential part is notched, and the cap is assembled to the valve element housing so that the notch is positioned in the retraction portion.

A fuel tank includes a tank panel in which a storage space of a fuel is formed, a tank inlet fixed to the tank panel, and a tank cap that allows the tank inlet to be opened and closed. The tank inlet includes a bottomed cylindrical inlet plate to which the tank cap is attached, an inlet pipe that protrudes from a bottom wall of the inlet plate into the storage space, and a separator configured to separate the fuel entering from the storage space into a liquid component and a gas component. The separator is supported by the bottom wall of the inlet plate in the storage space, and the separator is disposed on an outer side of the inlet pipe and on an inner side relative to an outer edge of the inlet plate in a bottom view of the tank inlet.

Disclosed is an apparatus for controlling shut-off of a fuel gun in a filler pipe of a fuel tank which inhibits early shut-off of the fuel gun before the fuel tank is fully filled with fuel while refueling. The apparatus includes: a retainer mounted in a filler neck of the fuel tank; a partition disposed in a space between an inner circumferential surface of the filler neck and an outer circumferential surface of the retainer and having a fuel intake hole formed in a lower end of the partition; and an early shut-off prevention valve disposed in the partition. The early shut-off prevention valve closes the fuel intake hole before the fuel tank is fully filled with fuel, and opens the fuel intake hole by fuel flowing to the filler neck from the fuel tank when the fuel tank is fully filled with the fuel.