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:
An oxygen-containing gas supply device of a fuel cell system is equipped with an oxygen-containing gas supply flow passage that communicates with an oxygen-containing gas inlet of a fuel cell. An oxygen-containing gas discharge flow passage communicates with an oxygen-containing gas outlet of the fuel cell. A compressor is disposed in the oxygen-containing gas supply flow passage and a supply flow passage sealing valve is disposed downstream from the compressor in the oxygen-containing gas supply flow passage. A discharge flow passage sealing valve is disposed in the oxygen-containing gas discharge flow passage, and a discharge fluid circulation flow passage that communicates with the oxygen-containing gas discharge flow passage is disposed at a location upstream from the discharge flow passage sealing valve, while also communicating with the oxygen-containing gas supply flow passage at a location upstream from the compressor.
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 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 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 fuel cell system includes a fuel cell, a fuel cell box, a ventilation device, an air intake duct, and a gas outlet pipe. The fuel cell is disposed in the fuel cell box. The ventilation device is provided to supply air to the fuel cell box. The air intake duct connects the ventilation device to the fuel cell box to supply air from the ventilation device into the fuel cell box. The gas outlet pipe is connected to the air intake duct and connects an inside space of the fuel cell box to an outside space of the fuel cell box through the air intake duct. The gas outlet pipe has an opening cross-sectional area smaller than an opening cross-sectional area of the air intake duct.
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:
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.