A fuel cell vehicle mounted with a fuel gas tank in an underfloor of the vehicle. The fuel cell vehicle includes: a floor that has a projecting portion projecting upward in a height direction of the vehicle and extending along a front and rear direction of the vehicle; a fuel gas tank arranged under the projecting portion in the height direction of the vehicle and fixed to the floor; and an undercover arranged under the fuel gas tank in the height direction of the vehicle. The undercover has a fixation protruded portion that projects upward in the height direction of the vehicle in a side of the fuel gas tank in a width direction of the vehicle, and being fixed to the floor by the fixation protruded portion.

According to one aspect of the present invention, a method for diagnosing a failure of a flowmeter in a measuring machine, includes calculating a filling amount at an end of filling of the hydrogen gas into a tank from the measuring machine by using a pressure, a temperature, and a volume of the tank; and determining whether or not the flowmeter fails by using a plurality of error values between a metering filling amount at the end of filling measured using the flowmeter and a calculated filling amount at the end of filling calculated using the pressure, the temperature, and the volume of the tank, the plurality of error values being based on a plurality of past performance data stored in a storage device, and an error value at the end of filling of the hydrogen gas at a present time, and outputting a result.

A fuel cell vehicle includes a front compartment and a metallic dash panel in a front side of the vehicle. The front compartment houses a fuel cell stack, a gas-liquid separator, and a fuel gas pump. The dash panel is disposed between the front compartment and a cabin to partition them. The fuel gas pump is mounted to a lower portion of a stack frame in a state of projecting from the stack frame toward the dash panel side. The gas-liquid separator is mounted to a lower portion of the fuel gas pump in a state of projecting from the stack frame and the fuel gas pump toward the dash panel side. The fuel gas pump is made of metal, and the gas-liquid separator is made of resin.

A pressure vessel mounting structure includes: a manifold including a discharge gas passage branching from a general passage via which a container body communicates with a valve; a fusible plug valve configured to close the discharge gas passage and to, when the fusible plug valve is melted, open the discharge gas passage such that the high-pressure gas is discharged; a case including a bottom face portion covering the container body and the manifold from below in the vehicle up-down direction, the case including a bead placed near the fusible plug valve, the bead being formed by protruding a part of the bottom face portion upward in the vehicle up-down direction; and a communicating opening via which a space under a floor of a vehicle communicates with the fusible plug valve, the communicating opening being formed in a part of the bead, the part facing the fusible plug valve.

Filling methods and systems are provided for a conformable fuel tank. In one example, a system comprises an active thermal management arrangement for the conformable fuel tank. The active thermal management arrangement comprises one or more recirculation passage for mixing hot fuel distal to an inlet port of the conformable fuel tank with cool incoming fuel flowing to the inlet port.

A gas sensor includes: a first electrode; a metal oxide layer that is on the first electrode and has a resistance value that changes when the metal oxide layer contacts hydrogen atoms; a second electrode on the metal oxide layer; and an insulating film that covers at least a part of side surfaces of the first electrode, the metal oxide layer, and the second electrode. In the metal oxide layer, a part of a first interface between the first electrode and the metal oxide layer is not covered by the insulating film and is exposed to a gas.

A frame arrangement for a vehicle may include a first side member and a second side member that each have an upper portion and a lower portion. The upper portions are spaced laterally apart by a first distance, and the lower portions are spaced laterally apart by a second distance less than the first distance. The frame arrangement may further include a first battery positioned between the lower portions of the side members, and a second battery positioned between the upper portions of the side members.

A device equipped with a tank, includes: the tank to be filled with a fuel gas; a valve mechanism provided in the tank; a receptacle with which a nozzle of a fuel gas filling device is connectable; a first filling path, an upstream end of the first filling path communicating with the receptacle; a second filling path, a downstream end of the second filling path communicating with the tank through the valve mechanism; and a storage container hermetically communicating between a downstream end of the first filling path and an upstream end of the second filling path, and storing foreign matter contained in the fuel gas, wherein the storage container is positioned vertically above the downstream end of the first filling path.

A fuel supply valve for supplying fuel from a fuel tank to a fuel cell stack includes: a plunger having a hollow therein, a core part disposed on the plunger, and a block part disposed within the hollow to maintain airtightness between the core part and the plunger, and a space in which the airtightness of the hollow has been maintained by the plunger, the core part, and the block part is defined as a pressure chamber.

To provide a filling apparatus capable of suppressing radial movement of a rod-shaped member (connecting pin) of a nozzle, and preventing damages and deformations (recesses and so on) from generating on an outer peripheral surface of the connecting pin. A filling apparatus (100) according to the present invention includes: a storage tank for storing hydrogen fuel; a filling nozzle (10) for filling a hydrogen gas from the storage tank through a fuel filling system to an in-vehicle hydrogen filling tank mounted on a vehicle; a rod-shaped member (2: connecting pin) and a main body portion (1) mounted on the filling nozzle (10); a sealing member (3: laminated sealing member) arranged on (a radially outer peripheral portion of the rod-shaped member of) the main body portion (1); a guide member (4: pressing member), projecting radially inward, mounted on a portion separated from an end side of the rod-shaped member (2) (from a receptacle 20 side in an in-vehicle hydrogen filling tank to the fuel filling system); and means for protecting an outer peripheral surface of the rod-shaped member (2) from slide on the guide member (4).