Abstract: A fuel tank system 12 includes: a communicating pipe 30 that has plural open portions 54A and 54B positioned higher than a full level inside a fuel tank 14 and communicates the inside of the fuel tank 14 with a canister 32; and a valve member 42 that is disposed outside the fuel tank 14 and, on the basis of a state of inclination of fuel detected by a fuel inclination sensor 60, closes the communicating pipe corresponding to an open portion predicted to be positioned in the fuel and opens the communicating pipe corresponding to an open portion predicted to be positioned in a gas layer section.

Abstract: An inter-flap space 36 between an outside flap 24 and an inside flap 44 of a filler pipe 16 is placed in communication with the inside of a fuel tank 14 using a communication pipe 62, and an open and close valve 64 is provided to the communication pipe 62. Further provided are a pressure reduction pump 82 that depressurizes the fuel tank 14, an internal tank pressure sensor 68 that detects an internal tank pressure of the fuel tank 14, and a controller that controls opening and closing of the open and close valve 64 and driving of the pressure reduction pump 82, and that determines an outside flap seal state of the outside flap 24 based on the internal tank pressure.

Abstract: A canister structure comprising: a canister 28 in which activated carbon 44 is accommodated, the activated carbon 44 being for adsorbing evaporated fuel produced in a fuel tank; an atmosphere vent tube 30 connected to the canister28, the atmosphere vent tube 30 introducing air into the canister 28 and causing evaporated fuel adsorbed by the activated carbon 44 to be desorbed when a negative pressure acts in the canister 28; and a fuel pump controller 46 disposed in the canister28, the fuel pump controller 46 controlling flow rates of fuel being supplied from the fuel tank to an engine, and the fuel pump controller 46 generating heat due to being operated.

Abstract: A fuel tank structure comprising a fuel tank; a canister; a first pipe that joins together a holding portion of the fuel tank and the canister; a first shut-off valve provided at the first pipe; a filler pipe; a second pipe that joins together the filler pipe and the canister; a second shut-off valve provided at the second pipe; a pressure sensor that detects the pressure inside the holding portion; a fuel pump that feeds the fuel to an engine; and a control unit. The control unit opens the first shut-off valve during refueling such that evaporative fuel is permitted to move from the holding portion to the canister, and closes the first shut-off valve after refueling. The control unit opens the second shut-off valve when the pressure inside the holding portion detected by the pressure sensor drops below a predetermined pressure which is lower than the atmospheric pressure.

Abstract: There is provided a fuel tank structure, the fuel tank structure including (1) a bag-shaped member that partitions a space within a fuel tank into a first space at an outer side and a second space at an inner side, (2) a first pressure sensor that senses pressure of the first space, (3) a second pressure sensor that senses pressure of the second space, (4) a pump that reduces pressure of the first space, and (5) a control section that, in a case in which the pressure of the first space is higher than a first threshold value, judges that a hole has formed in the fuel tank, and, in a case in which the pressure of the second space is lower than a. second threshold value, judges that a hole has formed in the bag-shaped member.

Abstract: A fuel tank structure including: a fuel tank that is mounted to an automobile and that stores fuel; a bat shaped member that is fixed to a ceiling portion inside the fuel tank, and that maintains a contact state with the fuel by expanding or contracting according to a fluid surface height of file stored inside the fuel tank; a pump housing recessed portion that is formed to a bottom portion of the fuel tank with a fuel pump disposed therein; and a fuel flow path that is in communication with the pump housing messed portion and that extends from the pump housing recessed portion in a groove shape.

Abstract: A fuel tank structure includes: a fuel tank that is installed in an automobile and that accommodates fuel; a bag-shaped member that is fixed to a ceiling portion of an interior of the fuel tank, and that can inflate and deflate; and a supporting plate that is provided at the bag-shaped member at a position facing a bottom portion of the fuel tank, the supporting plate having a specific gravity that is lower than a specific gravity of the fuel and causing the bag-shaped member to inflate toward the bottom portion of the fuel tank due to a weight of the supporting plate.

Abstract: A fuel tank structure includes: a fuel tank that is installed in an automobile and that accommodates fuel; a bag-shaped member that is fixed to a ceiling portion of an interior of the fuel tank, and that is formed in the shape of a bag and includes a reflecting film that reflects laser light, and whose state of contact with the fuel is maintained due to the bag-shaped member inflating or deflating in accordance with a height of a liquid surface of the fuel accommodated in the fuel tank; and a distance meter that irradiates laser light toward the bag-shaped member from the ceiling portion or a bottom portion of the fuel tank, and detects reflected light that is reflected from the reflecting film, and measures a distance to a contacting portion of the bag-shaped member and the fuel.

Abstract: A fuel tank structure includes: a fuel tank that is installed in an automobile and that accommodates fuel; a bag-shaped member that is fixed to a ceiling portion of an interior of the fuel tank, and whose state of contact with a liquid surface of fuel accommodated in the fuel tank is maintained due to the bag-shaped member inflating or deflating in accordance with a height of the liquid surface; a temperature sensor that senses a temperature of the fuel or evaporated fuel that is within the fuel tank; and a cooling wind introducing section that introduces cooling wind into an interior of the bag-shaped member in a case in which the temperature of the fuel or the evaporated fuel detected by the temperature sensor becomes higher than a predetermined temperature.

Abstract: In a fuel tank, high-rigidity portions are formed to protrude to an inner side from a part of a wall portion inside the fuel tank, the wall portion defining a closed space. A built-in part is fixed to the high-rigidity portions, and is also fixed to the horizontal portion. Therefore, when the fuel tank is deformed, deformation of the high-rigidity portions is restrained, so displacement of the built-in part is restrained. As a result, deformation is restrained in the horizontal portion of the fuel tank fixed to the built-in part that is restrained from being displaced when the fuel tank is deformed.

Abstract: A refueling portion structure of a fuel tank includes: a refueling pipe that has a refueling port into which a refueling nozzle is to be inserted, and that communicates with a fuel tank; an opening/closing valve that is provided on a flow path within the refueling pipe and closes the flow path, and that, when pushed by the refueling nozzle, opens the flow path; and a valve opening/closing device that, in a case in which a tank internal pressure of the fuel tank exceeds a set value that is set in advance, restricts or inhibits opening operation of the opening/closing valve, and, in a case in which the tank internal pressure is less than or equal to the set value, permits the opening operation of the opening/closing valve.

Abstract: An evaporative fuel treatment apparatus includes a fuel tank, a fuel pump, an adsorber, a purge mechanism, a supercharger and an electronic control unit. The fuel pump is configured to draw fuel that is supplied from the fuel tank to the internal combustion engine. The adsorber is provided inside the fuel tank and configured to adsorb evaporative fuel developed inside the fuel tank. The purge mechanism is configured to carry out purging for introducing fuel, desorbed from the adsorber, into an intake pipe of the internal combustion engine. The supercharger is configured to feed air into the intake pipe. The electronic control unit is configured to increase an amount of heat that is transferred from the fuel pump to the adsorber on the condition that an intake negative pressure in the intake pipe is higher than a predetermined threshold.

Abstract: A fuel tank filler structure has: a filler pipe that is equipped with a filler inlet into which a fuel nozzle is inserted, the filler pipe being communicated with a fuel tank; an opening and closing valve that is disposed in the filler pipe, closes off the filler inlet, and, when pushed by the fuel nozzle, opens the filler inlet; and a projecting portion that is disposed on the opening and closing valve, projects toward an opposite side from an insertion direction of the fuel nozzle, is exposed from the filler inlet, and is equipped with a sloping surface that extends from a projecting distal end portion toward a base portion and slopes relative to the insertion direction of the fuel nozzle.

Abstract: The evaporative fuel treatment apparatus includes: a fuel tank configured to store fuel for an engine; a sub-tank that communicates with the fuel tank; an adsorber provided inside the sub-tank and configured to adsorb evaporative fuel generated inside at least one of the fuel tank and the sub-tank; a purge mechanism configured to carry out purging for introducing evaporative fuel from the adsorber into the engine; and an in-tank fuel adjustment unit configured to adjust an amount of fuel inside the sub-tank in response to an operating state of the engine, the in-tank fuel adjustment unit including a fuel introduction pump configured to be able to introduce fuel from an outside of the sub-tank to an inside of the sub-tank, the fuel introduction pump being formed of a jet pump configured to be driven by at least part of fuel discharged from the fuel pump.

Abstract: A refueling portion structure of a fuel tank includes: a refueling pipe that has a refueling port into which a refueling nozzle is to be inserted, and that communicates with a fuel tank; an opening/closing valve that is provided on a flow path within the refueling pipe and closes the flow path, and that, when pushed by the refueling nozzle, opens the flow path; and a valve opening/closing device that, in a case in which a tank internal pressure of the fuel tank exceeds a set value that is set in advance, restricts or inhibits opening operation of the opening/closing valve, and, in a case in which the tank internal pressure is less than or equal to the set value, permits the opening operation of the opening/closing valve.

Abstract: A fuel tank fueling portion structure includes: a fueling pipe that is in fluid communication with a fuel tank, the fueling pipe being provided with a fueling opening; a lid that is openably and closably provided at a vehicle body, the lid in a closed state covering the fueling opening from a vehicle body outer side; an on-off valve that is provided at a flow channel inside the fueling pipe and closes off the flow channel, the on-off valve opening up the flow channel when pressed by the fueling nozzle; and a valve retention device that is provided in the fueling pipe, the valve retention device retaining an open state of the on-off valve that has been opened by pressing from the fueling nozzle, and releasing the retention of the open state of the on-off valve when the lid goes into a closed state.

Abstract: A refueling portion structure of a fuel tank has: a refueling pipe that has a refueling port; an opening/closing valve that is provided on a flow path within the refueling pipe; an accommodating portion that is provided at an outer side of the refueling pipe, that accommodates at an interior thereof an adsorbing material that adsorbs vapor fuel that has formed due to the liquid fuel evaporating, that communicates with the flow path further toward the refueling port side than the opening/closing valve, and into which the liquid fuel can flow; an atmospheric air passage, by which the accommodating portion communicates with atmospheric air; and a vapor movement passage, by which the accommodating portion communicates with an engine, and that is for moving vapor that is within the accommodating portion to the engine due to negative pressure from the engine.

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: An ECU determines whether an engine is temporarily stopped (step S1). When the ECU determines that the engine is temporarily stopped, the ECU prohibits purging with the use of a purge mechanism (step S2), and heats a canister (step S3). When the ECU determines that the engine is not temporarily stopped, the ECU permits purging with the use of the purge mechanism (step S4).

Abstract: Recirculation piping that recirculates fuel discharged from a fuel pump to an intake side of a fuel pump in a fuel tank is provided. In addition, a canister is formed with a heat transfer surface that guides fuel flowing through the fuel tank during actuation of the fuel pump. When the recirculation piping recirculates the fuel discharged from the fuel pump into the fuel tank, the heat transfer surface transfers heat between the canister and the fuel discharged from the fuel pump among fuel in the fuel tank.