Methods and systems are provided for an adapter for a fluid refilling system. In one example, an adapter configured for use with a diesel exhaust fluid (DEF) system may include a first end configured to couple with a DEF refill passage, a second end including an aperture shaped to receive a DEF nozzle, a pivotable door closing the aperture and biased against the aperture by a biasing member, and a magnetic ring positioned within the adapter and downstream of the pivotable door. The pivotable door may be formed of a material permeable to DEF vapors and may include a plurality of vent holes configured to flow vapors from the DEF system to atmosphere.

A fuel return device includes a fuel collector and a return system. The fuel collector is located in a passage between a fuel tank and a vapor fuel processing device that processes vapor fuel discharged from the fuel tank. The fuel collector collects the fuel and stores the collected fuel as a storage fuel. The return system extends from the fuel collector, and is connected to a low-pressure generation part that generates a low pressure by a flow of fuel refueled through a filler pipe into the fuel tank, to return the storage fuel to the fuel tank.

A fuel shutoff structure that prevents a fuel outflow to an external fuel line of a fuel tank mounted on a vehicle includes a fuel shutoff valve provided in the rear section of the fuel tank and a canister that is provided so as to be located across the front section of the fuel tank from the fuel shutoff valve and that is connected to the external fuel line, in which an in-tank fuel line extending from the fuel shutoff valve and the external fuel line are connected to each other at a location that is different from the fuel shutoff valve.

The present disclosure relates to a fuel tank comprising a filling tube opening via an inlet check valve into the fuel tank and comprising a venting device for discharging fuel vapors from the fuel tank. According to the present disclosure, the venting device has at least one venting line, which extends into the interior of the fuel tank and opens with an open end into a gas volume in the region of an upper wall part of the fuel tank, wherein the at least one venting line is guided such that it forms a siphon in the region of a lower wall part, and the inlet check valve has a bypass connection, to which the at least one venting line is connected.

A fuel storage assembly for a vehicle includes a fuel tank defining a fuel chamber, a fuel pump module and a vapor pressure detection system. The fuel pump module includes a flange engaged to the fuel tank and a fuel pump assembly supported by the flange and disposed in the fuel chamber. The vapor pressure detection system includes a vapor pressure sensor attached to the flange, a vapor pressure inlet device disposed in the fuel chamber, and a conduit communicating between the vapor pressure inlet device and the vapor pressure sensor.

There is provided an over-fueling prevention valve including a housing provided with a first opening, a second opening, and a first valve seat; a main valve provided with a one end opening, the other end opening, and a second valve seat; a first biasing portion; a sub valve; and a second biasing portion. Biasing forces of the first biasing portion and the second spring are set such that a valve re-closing pressure of the main valve is higher than a valve re-opening pressure of the sub valve. In a state in which the main valve is separated from the first valve seat, the first opening and the second opening communicate with each other via an external space.

A motor vehicle operating fluid container is made of thermoplastic. The container is composed of two shells forming a substantially closed hollow body. A first shell forms an upper base of the container, and a second shell forms a lower base of the container. The container includes at least one line which is designed as an integral part of a container wall over at least one sub-length, where the line is designed as a channel which runs in the container wall over said sub-length. The channel has an open trough-shaped profiled cross-section which forms a part of the line cross-section, and the channel is closed by at least one cover which complements the trough-shaped profiled cross-section so as to form a closed cross-section.

A fuel supply device (FS) includes a filler neck (10) that includes a nozzle guiding path that guides a fuel supply nozzle (FN), and a fuel passage that is continuous to the nozzle guiding path on a downstream side of the fuel passage, through which fuel that has been discharged from the fuel supply nozzle (FN) passes; a fuel vapor port (23) located outside of the filler neck (10) that has a through hole (23H) that communicates with the fuel passage (11Pd); and a vapor introduction body (70) that guides the fuel vapor from the fuel vapor port to the fuel passage (11Pd). The vapor introduction body (70) includes a within-through-hole support (71) that is inserted into and held in the through hole (23H), and includes a vapor passage (71a) along the through hole (23H), and a changing member (72) that faces an opening of the vapor passage (71a) on a side of the fuel passage (11Pd), and is configured to change a direction of flow of the fuel vapor that passes through the vapor passage (71a) to the side of the fuel passage (71a). The vicinity of the fuel vapor port in the filler neck is configured compactly.

A four-wheel vehicle includes an engine at least a portion of which is located farther forward than a seat, a fuel tank located above the engine and forwardly of the seat, a fuel filler including a fuel filler neck and a filler cap, a breather channel connected to the fuel filler, and an outflow prevention valve in the breather channel to prevent outflow of liquid fuel. The outflow prevention valve is located higher in a side view of the vehicle body than both of a lower end of the fuel tank and an upper end of the engine.

A fuel inlet 10 includes a fuel inlet body 11 that is formed of resin including a reception pipe portion 20, a filler pipe connection pipe portion 30, a breather pipe connection pipe portion 40, and a fluid introduction portion 60. The reception pipe portion 60 receives a fuel nozzle 3. The filler pipe connection pipe portion 30 is located on a lower side of the reception pipe portion 20 and is connected to a filler pipe 31. The breather pipe connection pipe portion 40 is located on an upper side of the reception pipe portion 20 and is connected to a breather pipe 41. The fluid introduction portion 20 causes foamed fluid to flow along an inner wall surface of the reception pipe portion 20 while liquefying the foamed fluid, the foamed fluid flowing from the breather pipe connection pipe portion 40 to the reception pipe portion 20. The fuel inlet body 11that is formed of resin is formed by integrally molding the reception pipe portion 20, the filler pipe connection pipe portion 30, the breather pipe connection pipe portion 40, and the fluid introduction portion 60.