An erroneous fuel feed prevention device includes paired flaps having a surface slanted relative to a direction of insertion of a fuel feeding nozzle. A turn shaft part, a support hole, and paired extension portions are provided. A first biasing member is configured to bias flaps of the paired extension portions to turn in a closing direction. A first restriction portion and a second restriction portion are configured to restrict the flaps from turning in an opening direction. While slanted surfaces are pressed by the fuel feeding nozzle, each of the flaps slide outward in radial directions of the fuel feed passage to release turning restriction states of the first restriction portion and the second restriction portion, and after the release, the flaps turn in an integrated manner with the extension portions being in contact with the respective other flaps.

Disclosed is an inlet end piece for the tank inlet of a motor vehicle, having a closure insert arranged in an upper area of a pipe inlet, having a filling opening and a sealing flap which counter to the force of a closure spring by way of a gas pump nozzle is capable of being opened by pivoting, and is held in the closed state by the closure spring. The inlet end piece has an indicator means having an indicator area, wherein the indicator means in the case of a closed sealing flap is located in an inactive position in which an indicator area of the indicator means is not visible to the user, and in the case of the sealing flap being at least partially opened, the indicator means is displaced into a signal position in which the indicator area becomes visible.

To prevent fuel from leaking to outside even when the fuel flows back at the time of an automatic stop operation during refueling. A fuel supply portion structure of a fuel supply pipe, including a tubular portion having a filler port and a connection port, a first flap mechanism which is provided on the filler port side of the tubular portion, a drain hole, and a drain hole on-off valve, wherein the drain hole on-off valve is disposed on a placement surface located at the lowermost side of a vehicle on an inner wall of a first inner diameter member, the placement surface is made of an inclined surface falling from the filler port side toward the connection port with respect to a horizontal plane of the vehicle, and a wall portion rising toward the filler port is provided on the filler port side of the inclined surface.

An opening-closing apparatus for a fuel tank comprises a fuel passage-forming portion configured to form a fuel passage that is arranged to introduce a supplied liquid fuel to the fuel tank; an insertion-side opening-closing mechanism configured to open and close the fuel passage; a tank-side opening-closing mechanism located on a fuel tank side of the insertion-side opening-closing mechanism and configured to open and close the fuel passage; a liquid discharge path configured to allow for communication of a portion of the fuel passage between the insertion-side opening-closing mechanism and the tank-side opening-closing mechanism to the outside of the opening-closing apparatus; and an open-close valve configured to open and close the liquid discharge path and to be opened toward the outside. This configuration of the opening-closing apparatus for the fuel tank reduces dust and the like invaded from the outside into the fuel passage which a liquid fuel passes through.

Provided are a filler tube and a filler neck including the filler tube that may reliably prevent false injection of fuel even though structures thereof for suppressing the false injection of the fuel are simplified. A filler tube defining a path through which fuel from an injection nozzle is supplied to a fuel tank is provided. The filler tube includes: a main body having a hollow defined therein, into which the injection nozzle is inserted; a first rotating part disposed to penetrate one side wall of the main body and axially connected to the main body to be axially rotatable outwardly of the main body; and a second rotating part disposed to penetrate the other side wall of the main body to face away from the first rotating part and axially connected to the main body to be axially rotatable outwardly of the main body.

A fuel filling aperture device includes a closing member turned to an open position to open a fuel filling aperture by an introduction of a fuel filling nozzle. The closing member includes a pair of flap members, and urging devices urging the pair of flap members to be positioned at a closed position. Each of the pair of flap members includes a turning assembly portion which becomes a center of the turning, and an abutment portion relative to the other flap member. Also, a seal projecting piece abutting against an opening edge portion of a pass-through opening of the fuel filling nozzle at the closed position, and an edge projecting piece continuing to a terminal of the seal projecting piece, and forming at least one portion of the abutment portion, are formed on a surface portion of each of the pair of flap members.

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.

Disclosed herein is an integrated fuel mixing prevention device for a diesel vehicle, in which a diesel filler neck and a urea filler neck are integrated with each other to prevent fuel from mixing, allowing only a diesel fuel filling gun to be inserted into a fuel inlet when a diesel fuel filling mode is selected and allowing only a urea filling gun to be inserted into the fuel inlet when a urea filling mode is selected, which may prevent a fuel mixing an accident caused by incorrect replenishment.

An oil filler port of the capless oil feeder includes: an oil filler port main body made of a resin, a breather tube portion made of the resin, and a flap valve. The oil filler port main body has a tubular shape and includes a nozzle insertion port for inserting an oil filler nozzle at one end and a fuel feed port for supplying fuel to a filler tube at the other end. The breather tube portion is formed integrally on an outer side of a peripheral surface of the oil filler port main body and connected to a breather tube. The flap valve is foamed to be insertable from the fuel feed port, and is disposed inside the oil filler port main body to close the nozzle insertion port and is opened by insertion of the oil filler nozzle.

An erroneous refueling prevention device restricts or allows insertion of a refueling gun into a refueling passage depending on an outer diameter of the refueling gun. The device includes a flap configured to open or close the refueling passage by a turn of the flap about a first turn pivot; and a switch configured to be unlocked from the flap by a turn of the flap to a half-opened state, and to turn about a second turn pivot. The switch includes a protrusion detector configured to, in response to the turn, project to a position where the protrusion detector faces the refueling passage. The switch restricts or allows a turn of the flap from the half-opened state to a fully-opened state, depending on a turn amount of the switch to be determined by a contact relationship between the protrusion detector and the refueling gun.