Abstract: A fuel supply system includes a fuel gas tank; a temperature detecting portion; a fuel gas discharge flow path; a main stop valve that is provided in the fuel gas discharge flow path; and a control portion. The main stop valve includes an inlet portion and an outlet portion, a main valve that is arranged between the inlet portion and the outlet portion and that opens and closes the fuel gas discharge flow path, a pilot flow path that is provided so as to communicate the inlet portion with the outlet portion, a pilot valve that opens and closes the pilot flow path, and an actuator capable of opening and closing the main valve and the pilot valve at different timings. The control portion opens the pilot valve and closes the main valve when the detected temperature is equal to or lower than a first reference temperature.

Abstract: A valve device includes a wire channel through which wires are routed from the inside of a gas tank to the outside of the gas tank, and a hermetic connector in which a sealing member is provided around wire pins that constitute part of the wires is provided in the wire channel. In addition, the wire channel has multiple (two) bent portions formed on the outer side of the hermetic connector. When pulling force acts on the wires from the outside, stress concentration portions are formed in the wires at these bent portions.

Abstract: A component holding device includes: a fixing member that has a first inner wall surface that forms a first hole into which gas can be entered and a component can be inserted; a component holding section that is fit to the first hole of the fixing member and that holds the component; a sealing section that is provided in the first hole and that seals the component holding section to prevent water from entering into the first hole of the fixing member; and a vent path that is provided in at least one of the fixing member and the component holding section so as to communicate with a gas residual section in the component insertion hole and that discharges leaked gas in the gas residual section to outside air.

Abstract: A valve device includes a wire channel through which wires are routed from the inside of a gas tank to the outside of the gas tank, and a hermetic connector in which a sealing member is provided around wire pins that constitute part of the wires is provided in the wire channel. In addition, the wire channel has multiple (two) bent portions formed on the outer side of the hermetic connector. When pulling force acts on the wires from the outside, stress concentration portions are formed in the wires at these bent portions.

Abstract: A valve system includes a fusible plug valve that functions as a fusible plug valve and as a manual valve. When functioning as a fusible plug valve, the fusible plug valve opens at a high temperature to release gas from a high pressure tank to outside. When functioning as a manual valve, the fusible plug valve is opened manually to release the gas from the high pressure tank to the outside.

Abstract: A fluid supply valve attachment device that has a tank, a fixing member in which a recessed fitting section is formed, a fluid supply valve that is inserted in and fixed to the recessed fitting section, a first seal member which seals a space between the tank and the fixing member, and a second seal member which seals a space between the fixing member and the fluid supply valve. The maximum inside diameter of the recessed fitting section is defined as D, a distance between a cross-sectional center of the first seal member and a cross-sectional center of the second seal member in a direction that a central axial line of the recessed fitting section extends in an attached state is defined as L1, and L1 is set within 2.5×D.

Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.

Abstract: A valve device includes: a valve housing defining a cylindrical space connected to a high-pressure source, and having a first communication hole open at a valve seat located at a bottom portion of the valve housing and providing fluid communication between the cylindrical space and a low-pressure source; a seal member arranged in the cylindrical space and providing or shutting off fluid communication between the high-pressure and low-pressure sources so that the seal member moves away from or contacts the valve seat; and a stem having an accommodating recess at one end of the stem and moved axially. The seal member is fitted and held in the accommodating recess. The seal member has a second communication hole that provides fluid communication between a bottom face of the accommodating recess and the low-pressure source when the seal member is in contact with the valve seat.

Abstract: A valve device includes: a valve housing defining a cylindrical space connected to a high-pressure source, and having a first communication hole open at a valve seat located at a bottom portion of the valve housing and providing fluid communication between the cylindrical space and a low-pressure source; a seal member arranged in the cylindrical space and providing or shutting off fluid communication between the high-pressure and low-pressure sources so that the seal member moves away from or contacts the valve seat; and a stem having an accommodating recess at one end of the stem and moved axially. The seal member is fitted and held in the accommodating recess. The seal member has a second communication hole that provides fluid communication between a bottom face of the accommodating recess and the low-pressure source when the seal member is in contact with the valve seat.

Abstract: A fluid supply valve attachment device that has a tank, a fixing member in which a recessed fitting section is formed, a fluid supply valve that is inserted in and fixed to the recessed fitting section, a first seal member which seals a space between the tank and the fixing member, and a second seal member which seals a space between the fixing member and the fluid supply valve. The maximum inside diameter of the recessed fitting section is defined as D, a distance between a cross-sectional center of the first seal member and a cross-sectional center of the second seal member in a direction that a central axial line of the recessed fitting section extends in an attached state is defined as L1, and L1 is set within 2.5×D.

Abstract: A component holding device includes: a fixing member that has a first inner wall surface that forms a first hole into which gas can be entered and a component can be inserted; a component holding section that is fit to the first hole of the fixing member and that holds the component; a sealing section that is provided in the first hole and that seals the component holding section to prevent water from entering into the first hole of the fixing member; and a vent path that is provided in at least one of the fixing member and the component holding section so as to communicate with a gas residual section in the component insertion hole and that discharges leaked gas in the gas residual section to outside air.