Abstract: An ejector and a fuel cell system using the ejector which can improve a control of an ejection pressure of a fluid. The ejector 50 includes a body 60, a nozzle 80, a needle 70, a diffuser 90 which sucks a second fluid by a negative pressure generated by a first fluid ejected from the nozzle 80, and a first, a second and a third diaphragms 100, 110, 120 which are movable in the axial direction against the needle 70. The first diaphragm 100 and the second diaphragm 110 have the same effective area, and an effective area of the third diaphragm 120 is different from those of the first diaphragm 100 and the second diaphragm 110.

Abstract: An ejector comprises a body, a nozzle, a needle, a diffuser which draws in a second fluid using negative pressure caused by ejection of a first fluid from the nozzle and mixes the first and second fluids together, first and second diaphragms which allows the nozzle to shift in an axial direction with respect to the needle, and a first fluid chamber which is supplied with the first fluid. A valve in which a valve body contacts and separates from a valve seat according to the shifting action of the nozzle is formed by providing either the nozzle or the needle with the valve body and providing the other with the valve seat in the first fluid chamber. A back pressure chamber connecting to the first fluid chamber via the valve is provided between a trunk portion of the nozzle and a basal part of the needle.

Abstract: An ejector for a fuel cell system of the present invention includes a nozzle having a nozzle hole for discharging hydrogen supplied via an inlet port of an ejector body, a diffuser for mixing hydrogen discharged from the nozzle hole and hydrogen off-gas discharged and returned via a circulation passage from a fuel cell, a needle displacing in the axial direction by a driving force of a solenoid, and a bearing member held in a hollow portion of the nozzle, and having a through hole that movably supports the needle in the axial direction.

Abstract: An exhaust gas disposal apparatus of a fuel cell of the present invention is equipped with a dilution vessel having a staying chamber for staying a hydrogen gas purged from a fuel cell and exhaust piping for passing a cathode off-gas, wherein any of the dilution vessel and the exhaust piping is provided with a hydrogen suction hole for sucking the hydrogen gas within the staying chamber and an off-gas supply hole for supplying the cathode off-gas within the exhaust piping into the dilution vessel, and wherein a flow adjustment measure for flow-adjusting the hydrogen gas, leading it into the hydrogen suction hole, and suppressing diffusion of the cathode off-gas supplied into the staying chamber from the off-gas supply hole is provided.

Abstract: An ejector is provided with a first fluid chamber into which hydrogen gas is introduced; a rod-shaped needle; a nozzle exhausting hydrogen gas introduced into the first fluid chamber from an exhaust port; a second fluid chamber into which hydrogen off-gas is introduced; a diffuser provided at the exhaust port of the nozzle; and a third fluid chamber into which air is introduced. The first fluid chamber is provided between the second fluid chamber and the third fluid chamber. The first diaphragm 65 separates the first fluid chamber and the second fluid chamber and the second diaphragm separates the first chamber and the third fluid chamber. Then, the needle and the nozzle moves to approach each other by the pressure of air introduced into the third fluid chamber and isolate each other by the pressure of hydrogen off-gas introduced into the second fluid chamber.

Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.

Abstract: The fuel cell system enabling shortening of the startup time of the system and preventing a pressure sensor from malfunctioning is provided. The fuel system 1 includes a fuel cell 10; a hydrogen tank 22 supplying hydrogen gas to the anode side of the fuel cell 10 through a hydrogen supply channel 43; an air pump 21 supplying air to the cathode side of the fuel cell 10 through an air supply channel 41; a bypass 46 connecting the air supply channel 41 with the hydrogen supply channel 43; an air induction valve 461 provided on the bypass 46, enabling control of the amount of gas flowing in the bypass 46; and a pressure sensor 51 having a diaphragm which is deformable by the pressure of the hydrogen gas, the pressure sensor detecting pressure of hydrogen gas by detecting displacement of the diaphragm.

Abstract: Hydrogen gas supplied to and then purged from a fuel cell is temporarily retained in a reservoir provided in an exhaust fuel diluter, and diluted before release into atmosphere. Cathode exhaust gas discharged from a cathode of the fuel cell is mixed to dilute the hydrogen gas, and air continues to be supplied to the cathode of the fuel cell for a specific period of time even after generation of electric power in the fuel cell is stopped, so that the hydrogen gas retained in the reservoir is continuously diluted with the cathode exhaust gas and released. Air for ventilation of the fuel cell may be used instead or in addition, to dilute and release the hydrogen gas retained in the reservoir after the generation of electric power in the fuel cell is stopped.

Abstract: An apparatus for dilution of discharged fuel of a fuel cell is provided, which has an inlet for guiding purged hydrogen gas coming from the fuel cell, a reservoir for storing the purged hydrogen gas guided through the inlet, and a cathode exhaust gas pipe penetrating the reservoir. The cathode exhaust gas pipe has a feature that it has holes inside the reservoir and is supplied with cathode exhaust gas of the fuel cell. Also the apparatus has a feature that the cathode exhaust gas pipe sucks the purged hydrogen gas stored in the reservoir through the holes and discharges the purged hydrogen gas diluted by mixing with the cathode exhaust gas.

Abstract: A fuel cell system mounted in a vehicle includes a fuel cell stack, a coolant supply mechanism, and a fuel gas supply mechanism. The coolant supply mechanism includes a coolant supply pipe and a coolant discharge pipe, provided on a front side in a traveling direction of the vehicle, relative to the fuel cell stack. The fuel gas supply mechanism includes a fuel gas supply pipe, provided on a rear side in the traveling direction, relative to the fuel cell stack.

Abstract: A fuel cell vehicle includes: a vehicle body; a floor panel provided on the bottom of the vehicle body; a floor tunnel that is formed bulging upward in the center of the floor panel in the vehicle body width; a pair of front seats that are disposed on the floor panel, outside of the floor tunnel in the vehicle body width direction; center frames that support the floor tunnel, disposed at the center in the vehicle body width and extending along the vehicle body longitudinal direction; a sub-frame provided on the bottom of the floor panel and joined to the center frames; and a fuel cell stack mounted on the sub-frame and provided under the floor tunnel.

Abstract: A check valve is disposed in a hydrogen offgas circulation path which is connected to a fuel cell so as to flow the hydrogen offgas only in one direction. Inside a valve housing, a first compression chamber and a second compression chamber are provided such that a bulkhead is disposed therebetween. In the bulkhead 14, a first communication hole 18 and a second communication hole 19 are formed so as to communicate between the first compression chamber and the second compression chamber. In a first reed valve, an opening end is disposed upward and a fixed end is disposed downward. In a second reed valve, an opening end is disposed downward and a fixed end is disposed upward. By doing this, operability in the check valve after water has frozen can be improved.

Abstract: An arrangement structure for a fuel cell system in a vehicle including a fuel cell box which holds a fuel cell, a sub-frame which holds a fuel gas tank, and a fuel gas dilution box. The sub-frame is placed so as to be aligned with the fuel cell box, and the fuel gas dilution box is disposed between the fuel cell and the sub-frame.

Abstract: An ejector having a nozzle portion having openings provided at a distal end and a proximal end thereof, respectively, for injecting drive-stream gas, a diffuser portion provided on a distal end side of the nozzle portion for drawing in auxiliary gas by negative pressure which is generated in the drive-stream gas by injection from the nozzle portion so as to join the auxiliary-stream gas together with the drive-stream and discharge the drive-stream gas and the auxiliary gas, a needle slidably inserted into an interior of the nozzle portion in an axial direction of the nozzle portion for adjusting an opening area of the nozzle portion in accordance with an inserted position thereof, a drive unit for moving the needle axially and an auxiliary stream introducing portion comprising at least two openings for introducing the auxiliary-stream gas into the diffuser portion therefrom.

Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.

Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.

Abstract: A fuel cell discharge-gas processing device that dilutes anode off-gas discharged from a fuel cell anode by mixing the anode off-gas with a diluent gas so as to produce a diluted gas and then discharges mixture of the anode off-gas and the diluent gas, includes: a dilution container; an anode off-gas introduction path; a diluent gas path through; a diluent gas emission hole; a mixed gas discharge hole; at least one partition panel; and a communication gas path, wherein the anode off-gas emission hole is provided so as to emit anode off-gas toward the partition panel.

Abstract: A discharged fuel diluter includes: a retention region with a predetermined volume, into which a fuel discharged from a fuel cell is retained at the time of purging; a dilution region with a predetermined volume, through which air discharged from the fuel cell flows and at which the air is mixed with the fuel from the retention region to dilute the fuel; and a communicating portion, through which the fuel flows from the retention region to the dilution region.

Abstract: An exhaust gas disposal apparatus of a fuel cell of the present invention is equipped with a dilution vessel having a staying chamber for staying a hydrogen gas purged from a fuel cell and exhaust piping for passing a cathode off-gas, wherein any of the dilution vessel and the exhaust piping is provided with a hydrogen suction hole for sucking the hydrogen gas within the staying chamber and an off-gas supply hole for supplying the cathode off-gas within the exhaust piping into the dilution vessel, and wherein a flow adjustment measure for flow-adjusting the hydrogen gas, leading it into the hydrogen suction hole, and suppressing diffusion of the cathode off-gas supplied into the staying chamber from the off-gas supply hole is provided.

Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.