Abstract: To obtain a fuel filler structure for a fuel tank wherein when causing an opening and closing valve to close, it can be ensured that the opening and closing valve does not rapidly rotate to a closed position in which it closes a fuel fill inlet, and when causing the opening and closing valve to open, the opening and closing valve can be opened with a small force. A fuel filler structure is equipped with a damper on the near side of a flapper valve in the insertion direction of a fuel nozzle. When the flapper valve rotates to an open position, the damper does not act on the flapper valve, and when the flapper valve rotates to a closed position, the damper acts on the flapper valve.

Abstract: A fuel supply device is obtained in which joint strength can be maintained in a joint portion of plural filter members configuring a fuel filter. A fuel filter with an overall bag shape is configured by welding together an upper face filter cloth a lower face filter cloth of the fuel filter at a welded portion. A sub tank upper side member and a sub tank lower side member nip the upper face filter cloth and the lower face filter cloth at a nipping position that is at a different position from the welded portion.

Abstract: A fuel supply device is obtained in which joint strength can be maintained in a joint portion of plural filter members configuring a fuel filter. A fuel filter (16) with an overall bag shape is configured by welding together an upper face filter cloth (16U) a lower face filter cloth (16L) of the fuel filter (16) at a welded portion (16C). A sub tank upper side member (15U) and a sub tank lower side member (15L) nip the upper face filter cloth (16U) and the lower face filter cloth (16L) at a nipping position NP that is at a different position from the welded portion (16C).

Abstract: A fueling portion structure of a fuel tank can reliably close a fueling port, and at which pulling-out of a fueling gun from the fueling port is easier. A center of a rotation shaft and a contact position when valve is closed, that a spring for the flapper valve contacts when a flapper valve is at a closed-valve position, are connected, and a reference segment when the valve is closed is assumed. The center of the rotation shaft and a contact position when the valve is open, at a time when the flapper valve is at open-valve position HP, are connected, and a reference segment when the valve is open is assumed. A spring shaft is provided further toward the contact position when valve is closed side than a bisector of an angle formed by the reference segment when valve is closed and the reference segment when valve is open.

Abstract: A fuel supply device is obtained in which joint strength can be maintained in a joint portion of plural filter members configuring a fuel filter. A fuel filter with an overall bag shape is configured by welding together an upper face filter cloth a lower face filter cloth of the fuel filter at a welded portion. A sub tank upper side member and a sub tank lower side member nip the upper face filter cloth and the lower face filter cloth at a nipping position that is at a different position from the welded portion.

Abstract: A fuel tank opening-closing device has a tank opening forming member, a flap valve mechanism that has an opening-closing member, and an opening-closing activation mechanism that switches between the locked position and the unlocked position that does the opening operation of the opening-closing member. The opening-closing activation mechanism has a nozzle detection mechanism which has introductory push parts mounted on the opening-closing member and adapted to receive force of motion in the insertion direction of the fueling nozzle, and a lock member that is mounted on the tank opening forming member and that selectively shifts between the locked position and the unlocked position by engaging and disengaging with the opening-closing member, and a locking mechanism that moves the locking member from the locked position to the unlocked position by being pushed by the introductory push parts.

Abstract: The fuel tank structure includes: a fuel tank that is configured to contain fuel inside; a liquid level detection sensor arranged in a vertical orientation inside the fuel tank and configured such that a capacitance of the liquid level detection sensor varies on the basis of a contact range in which the fuel is in contact with the liquid level detection sensor; a tubular element extending vertically while laterally surrounding the liquid level detection sensor and configured to allow the fuel to enter from a lower portion of the tubular element to an inside of the tubular element and to exit from the inside to the lower portion; and a fuel storage member that communicates with the inside of the tubular element and the inside of the fuel tank through a fuel input/output port and configured to store the fuel inside the fuel tank.

Abstract: To provide a fuel supplying device that, in a fuel tank equipped with plural accommodating portions that accommodate fuel, can suppress occurrence of running-out of fuel and can send-out fuel in a short time, even when a liquid surface of fuel of a fuel tank main body tilts. A sub-cup that has a fuel filter and a storage member is disposed at each of a first accommodating portion and a second accommodating portion. A distal end of a vapor discharging pipe of a fuel pump main body (or a sending-back pipe of a pressure regulator) is disposed within a second storage member.

Abstract: It is a task of the invention to provide a leak diagnosis device for an evaporated fuel processing system, which is able to carry out a leak diagnosis irrespective of a temperature inside a fuel tank. A leak diagnosis device that is used in an evaporated fuel processing system including a canister (41) and a purge line (43). The canister (41) is provided inside a fuel tank (31), and adsorbs evaporated fuel that is produced inside the fuel tank (31). The purge line (43) introduces purge gas, including evaporated fuel, from the canister (41) into an intake pipe (23) of an engine (2). An alarm lamp (51) indicating an abnormality is lit on the condition that the width of decrease in the concentration of HC in the purge line (43) in a predetermined period is smaller than a predetermined threshold.

Abstract: To obtain a fuel filler structure for a fuel tank wherein when causing an opening and closing valve to close, it can be ensured that the opening and closing valve does not rapidly rotate to a closed position in which it closes a fuel fill inlet, and when causing the opening and closing valve to open, the opening and closing valve can be opened with a small force. A fuel filler structure is equipped with a damper on the near side of a flapper valve in the insertion direction of a fuel nozzle. When the flapper valve rotates to an open position, the damper does not act on the flapper valve, and when the flapper valve rotates to a closed position, the damper acts on the flapper valve.

Abstract: To obtain a fuel tank fuel filler structure with which even a fuel nozzle having a large diameter portion can be inserted easily into a fuel fill inlet and which can highly demonstrate the action of guiding the fuel nozzle to the fuel fill inlet. One end of a guide plate (44) is rotatably supported on a rotational shaft (42) disposed on a flapper valve (20). The guide plate (44) is biased by a guide plate biasing spring toward a withdrawal region in which the guide plate withdraws from a passage region of a fuel nozzle. In a state where the flapper valve (20) is in an open position (HP), the entire guide plate (44) is positioned in the withdrawal region. In a state where the flapper valve (20) is in a closed position (TP), the guide plate (44) can be placed near a fuel fill inlet (26).

Abstract: A liquid state detection sensor capable of detecting a large number of objects with a small number of terminals. The liquid state detection sensor is provided with three terminals A to C, a capacitor C1 between terminals A and B, a capacitor C2 between terminals B and C, and a capacitor C3 between terminals A and C. The capacitor C1 and the capacitor C2 are connected in series, and the capacitor C3 is connected in parallel with this series connection. The capacitor C1 is disposed outside liquid fuel in a fuel tank, the capacitor C2 is partially or wholly immersed in the fuel in the fuel tank, and the capacitor C3 is disposed close to a floor of the fuel tank.

Abstract: Provided is a fuel supply device that is able to achieve downsizing of a fuel pump in a configuration in which part of a fuel to be sent outside by driving of the fuel pump is able to be returned to an accommodation portion not provided with the fuel pump. A jet pump is provided in a vapor discharge pipe that is able to return a fuel from a fuel-pump main body to a second fuel receiving area. A sectional area of a passage of the vapor discharge pipe is changeable by a float valve.

Abstract: A fueling portion structure of a fuel tank can reliably close a fueling port, and at which pulling-out of a fueling gun from the fueling port is easier. A center of a rotation shaft and a contact position when valve is closed, that a spring for the flapper valve contacts when a flapper valve is at a closed-valve position, are connected, and a reference segment when the valve is closed is assumed. The center of the rotation shaft and a contact position when the valve is open, at a time when the flapper valve is at open-valve position HP, are connected, and a reference segment when the valve is open is assumed. A spring shaft is provided further toward the contact position when valve is closed side than a bisector of an angle formed by the reference segment when valve is closed and the reference segment when valve is open.

Abstract: A filling port structure for a fuel tank includes a filling port member that defines a filling port, an open/close valve that opens and closes the filling port, a rotary member that attaches the open/close valve to the filling port member in a manner such that the open/close valve is rotatable between an open position and a closed position, a locking member that is provided in the filling port member and is movable between a locking position to lock the open/close valve in the closed position and an unlocking position to unlock the open/close valve, an unlocking member that moves the locking member to the unlocking position when pressed by a fuel gun, and a retention portion that holds the locking member in the unlocking position at least when the open/close valve is in the open position.

Abstract: A fluid pressure regulating device is i) provided with a pressure regulating member that forms a pressure regulating chamber inside a housing having introduction side and discharge side fuel passages, and communicates these passages according to introduced fuel pressure, and ii) is able to regulate the fuel pressure introduced into a fuel passage to a set pressure. The housing is provided with outer and inner annular valve seat portions that separate the fuel passages inside the pressure regulating chamber, and form another fuel passage inside the pressure regulating chamber. Different clearances are set between the pressure regulating member, and the outer annular valve seat portion and the inner annular valve seat portion, such that when the pressure regulating member abuts against one of the valve seat portions, a small gap is formed between the other valve seat portion and the pressure regulating member.

Abstract: A fuel tank system in which a solenoid valve on piping that communicates between a fuel tank and a canister may be reduced in size. A valve member (a diaphragm valve) is disposed in vent piping that communicates between the fuel tank and the canister. A second bypass channel is provided between a back pressure chamber of the diaphragm valve and the canister side of the vent piping. The solenoid valve is disposed in the second bypass channel.

Abstract: To provide a fluid pressure regulation apparatus and a fuel supply apparatus which are compact in arrangement and simple in construction, a pressure regulator includes a housing, a pressure adjustment member constituted by a partition wall forming together with the housing a pressure adjustment member held in communication with a fluid introduction opening and having the pressure adjustment chamber brought into communication with a fluid discharge opening in response to the pressure of fluid in the pressure adjustment chamber. The pressure regulator is capable of adjusting the fluid pressure in the pressure adjustment chamber to a preliminarily set pressure, and has one surface side thereof forming an area of a pressure receiving range receiving the fluid pressure, the area being variably set and the set pressure being varied in response to the area of the pressure receiving range.

Abstract: A fuel supply device is obtained in which joint strength can be maintained in a joint portion of plural filter members configuring a fuel filter. A fuel filter (16) with an overall bag shape is configured by welding together an upper face filter cloth (16U) a lower face filter cloth (16L) of the fuel filter (16) at a welded portion (16C). A sub tank upper side member (15U) and a sub tank lower side member (15L) nip the upper face filter cloth (16U) and the lower face filter cloth (16L) at a nipping position NP that is at a different position from the welded portion (16C).

Abstract: A fuel tank fuel filler structure with which even a fuel nozzle having a large diameter portion can be inserted easily into a fuel fill inlet and which can highly demonstrate the action of guiding the fuel nozzle to the fuel fill inlet. One end of a guide plate is rotatably supported on a rotational shaft disposed on a flapper valve. The guide plate is biased by a guide plate biasing spring toward a withdrawal region in which the guide plate withdraws from a passage region of a fuel nozzle. In a state where the flapper valve is in an open position, the entire guide plate is positioned in the withdrawal region. In a state where the flapper valve is in a closed position, the guide plate can be placed near a fuel fill inlet.