JP2017114213A - Hydrogen dilution device of fuel cell vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that actively collects hydrogen leaked from a fuel cell unit area, blows the leaked hydrogen into an exhaust duct by a dilution fan, and dilutes and diffuses the leaked hydrogen to unfailingly discharge the leaked hydrogen to the outside.SOLUTION: A fuel cell vehicle includes an exhaust duct 52 which discharges exhaust air from a fuel cell unit 2 mounted on the fuel cell vehicle to a vehicle body rear lower part. A cover 90 which collects leaked hydrogen from the fuel cell unit 2 is provided above the fuel cell unit 2. A hydrogen dilution device 91 of the fuel cell vehicle provided with a dilution fan 92 for suctioning air in the cover 90 and blowing the air to the exhaust duct 52 is provided.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a hydrogen dilution device for a fuel cell vehicle.

  A hydrogen dilution device for a fuel cell vehicle is provided with a dilution box for introducing hydrogen exhausted from the fuel cell, and the exhaust hydrogen is sufficiently diluted with outside air introduced by a fan into the dilution box so as to be discharged to the outside. (See Patent Document 1).

  On the other hand, in a fuel cell vehicle, various controllers for a fuel cell and a power controller are mounted. Various controllers include electrical components that generate heat. Further, since the fuel cell itself is a heat source, a layout configuration advantageous for cooling is being sought.

JP 2005-158574 A JP 2010-247574 A Japanese Patent Laying-Open No. 2015-77916

  In the hydrogen dilution apparatus described in Patent Document 1, hydrogen diluted in the dilution box leaks to the outside through the opening of the fan. Therefore, it is necessary to always operate the dilution fan. In addition, it is necessary to install a dedicated cooling fan for parts that generate severe heat, such as electrical components, or to cool them with a water-cooled type. The power consumption and noise of the fan motor are problematic, and leakage of hydrogen from the fuel cell unit is a problem. There is no special consideration for.

  In addition, in a fuel cell vehicle applied to an electric motorcycle, hydrogen leaked upward from the fuel cell unit is designed not to stay inside the vehicle body, and is released to the outside without being actively diluted. It is configured to be. However, in a fuel cell vehicle, if a minute leak continues for a long time due to damage or breakage of hydrogen-based parts, or if there is a leak without taking special measures for leaked hydrogen from the fuel cell unit, There is a risk of hydrogen retention.

  The present invention has been made in consideration of the above-described circumstances, and actively collects hydrogen leaking from the fuel cell unit area, blows it into the exhaust duct by a dilution fan, dilutes and diffuses it to the outside. An object of the present invention is to provide a hydrogen dilution apparatus for a fuel cell vehicle that can be reliably discharged.

  In order to solve the above-described problem, the present invention provides a fuel cell vehicle having an exhaust duct that guides exhaust from a fuel cell unit mounted on the vehicle to a rear lower part of the vehicle body. A hydrogen diluting device for a fuel cell vehicle, comprising a cover for collecting hydrogen leaking from a battery unit area, and a dilution fan for sucking air in the cover and blowing it into the exhaust duct Is to provide.

  In the hydrogen dilution apparatus for a fuel cell vehicle according to the present invention, hydrogen leaking from the hydrogen system parts and the fuel cell unit area of the fuel cell is actively collected in the cover, and the collected leaked hydrogen is diluted with a dilution fan. Thus, the air can be blown into the exhaust duct to be surely diluted and diffused and released to the outside, and the leaked hydrogen from the fuel cell unit area can be reliably released to the outside without staying in the vehicle body.

1 is a left side view showing an electric motorcycle to which an embodiment of a hydrogen dilution device for a fuel cell vehicle according to the present invention is applied. The left view which shows the state which removed the exterior (a cowling, a cover), etc. of the electric motorcycle of FIG. The perspective view which shows the state which removed the exterior etc. of the electric motorcycle of FIG. FIG. 4 is a left side view showing a fuel tank, a swing arm and the like provided in the electric motorcycle shown in FIGS. 2 and 3. The perspective view which shows the fuel tank, swing arm, etc. of FIG. Sectional drawing which follows the VI-VI line of FIG. Sectional drawing which follows the VII-VII line of FIG. FIG. 7 is a partial arrow view in the direction of arrow A in FIG. 6. FIG. 3 is a left side view showing a first embodiment of a hydrogen dilution device for a fuel cell vehicle, which is the rear half of the electric motorcycle of FIG. 2. FIG. 10 is an enlarged side cross-sectional view of the hydrogen dilution device for the fuel cell vehicle shown in FIG. 9. Explanatory drawing which shows in principle the 2nd Embodiment of the hydrogen dilution apparatus of the fuel cell vehicle which concerns on this invention. The 2nd Embodiment of the hydrogen dilution apparatus of the fuel cell vehicle which concerns on this invention is shown, and is sectional drawing similar to FIG. FIG. 13 is a simplified plan cross-sectional view showing a state in which a cover top side in the hydrogen dilution device of the fuel cell vehicle of FIG. FIG. 14 is a longitudinal sectional view taken along line XIV-XIV in FIG. 13. FIG. 14 is a plan sectional view similar to FIG. 13 showing a third embodiment of the hydrogen dilution apparatus for a fuel cell vehicle according to the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a left side view showing an electric motorcycle to which an embodiment of a hydrogen dilution apparatus for a fuel cell vehicle according to the present invention is applied. FIG. 2 is a left side view showing a state in which the exterior of the electric motorcycle of FIG. 1 is removed. FIG. 3 is a perspective view showing a state in which the exterior of the electric motorcycle of FIG. 1 is removed. In the present embodiment, the expressions “up / down”, “left / right”, and “front / rear” are based on the driver who has boarded the electric motorcycle. 1 to 3, the arrow F indicates the front of the electric motorcycle 1, and the arrow R indicates the rear of the electric motorcycle 1.

[First Embodiment]
(Electric motorcycle)
1 to 3 show an electric motorcycle 1 including a hydrogen dilution device for a fuel cell vehicle according to a first embodiment. The electric motorcycle 1 is a vehicle that travels by driving a motor 3 as an electric motor with electric power generated by a fuel cell 2 constituting a fuel cell unit. The electric motorcycle 1 is a scooter type motorcycle. The electric motorcycle 1 includes a vehicle body 5 extending in the front-rear direction, a front wheel 6 as a steering wheel, a steering mechanism 7 that supports the front wheel 6 in a steerable manner, a rear wheel 8 as a drive wheel, and a rear wheel 8 that swings up and down. A swing arm 9 that freely supports the motor 3 that drives the rear wheel 8 is provided.

  The vehicle body 5 includes a frame 11 as a vehicle body frame extending in the front-rear direction of the vehicle, an exterior 12 that covers the frame 11, and a seat 13 that is disposed above the rear half of the frame 11. The vehicle body 5 generates electric power and supplies the electric power, a fuel tank 15 that stores high-pressure gas of hydrogen as fuel used for power generation in the fuel cell 2, A secondary battery 16 that assists power, a power management device 17 that controls adjustment of the output voltage of the fuel cell 2 and distribution of power between the fuel cell 2 and the secondary battery 16, and DC power output by the power management device 17 An inverter 18 that converts the AC power into three-phase AC power, changes the frequency of the AC power and supplies power to the motor 3 to adjust the number of revolutions of the motor 3, and a vehicle controller 19 that comprehensively manages these are provided. ing.

  The power train of the electric motorcycle 1 has a fuel cell 2 and a secondary battery 16, and is a system that appropriately uses the power of each battery depending on the running state of the vehicle, the power generation state of the fuel cell 2, and the storage state of the secondary battery 16. is there. Here, when the electric motorcycle 1 decelerates, the motor 3 generates regenerative power. Further, the secondary battery 16 and the fuel cell 2 which are power sources of the vehicle are connected in parallel to the inverter 18 and supply electric power to the motor 3. The secondary battery 16 stores regenerative power generated by the motor 3 when the electric motorcycle 1 decelerates and surplus power generated by the fuel cell 2.

  The frame 11 is a combination of a plurality of hollow steel tubes. The frame 11 includes a head pipe 21 disposed at the upper front end, an upper down frame 22 that extends from the center of the head pipe 21 so as to incline backward, and is disposed below the head pipe 21 and inclines rearwardly downward. An extended lower down frame 23, a pair of left and right lower frames 24, a pair of left and right upper frames 25, a pivot shaft 26, an upper bridge frame 27, a lower bridge frame 28, a guard frame 29, and a mounted device protection frame 30 And. The head pipe 21 supports the steering mechanism 7 so as to be steerable, that is, swingable in the left-right direction of the vehicle.

  The pair of left and right lower frames 24 are disposed on the left and right of the lower down frame 23 and are connected to the lower portion of the head pipe 21. The pair of left and right lower frames 24 are rearward at the front inclined portion extending from the connecting portion with the head pipe 21 in a substantially parallel and downwardly inclined manner along the lower down frame 23, and at the lower end of the front inclined portion. A front curve portion that curves toward the vehicle body, and a straight line that extends linearly from the rear end of the front curve portion toward the rear of the vehicle body 5 toward the center portion of the vehicle body 5 (the center portion in the vehicle front-rear direction). And a portion. Further, the pair of left and right lower frames 24 includes a rear curved portion that curves from the rear end portion of the straight portion toward the rear upper side, and a rear inclined portion that extends obliquely upward from the upper end portion of the rear curved portion. And an upper and lower frame joint portion connected to the upper frame 25. The distance between the left and right lower frames 24 in the vehicle width direction (left and right direction) is wider than the distance between the upper frames 25 in the same direction.

  Each of the left and right lower frames 24 includes a footrest bracket 31a that supports a footboard 31 on which a rider places his / her foot from the lower side of the front curved portion.

  The lower frame 24 disposed on the left side of the vehicle body 5 includes a side stand bracket (not shown). The side stand bracket (not shown) is provided with a side stand (not shown) that allows the electric motorcycle 1 to stand by itself while being tilted to the left. The side stand swings between a standing position where the electric motorcycle 1 is self-supporting and a storage position along the vehicle body 5 so as not to hinder travel.

  The pair of left and right upper frames 25 are connected to the center in the vertical direction of the front inclined portion of the lower frame 24 in the front half of the vehicle body 5. The pair of left and right upper frames 25 are a horizontal portion extending substantially horizontally from the connection portion with the front inclined portion of the lower frame 24 toward the rear of the vehicle body 5 and a rear end of the horizontal portion of the pair of left and right upper frames 25. A rear end portion that is largely inclined rearwardly in the rear half of the vehicle body 5 and in an upper portion of the rear wheel 8 and that curves inward in the left-right direction of the vehicle body 5 and approaches the thickness (width dimension) of the rear wheel 8; ,have.

  The pivot shaft 26 is installed between the left and right upper frames 25 in the rear half of the vehicle body 5. That is, the pivot shaft 26 is located on the lower side of the left and right upper frames 25 and behind the joining portion (upper and lower frame joints) of the upper frame 25 and the lower frame 24 and with the horizontal portion of the left and right upper frames 25. It is installed between the left and right brackets 26 a connected to the rear inclined portions of the left and right lower frames 24.

  The upper bridge frame 27 is constructed at the front end portions of the left and right upper frames 25. The upper bridge frame 27 extends between the left and right upper frames 25 in a straight line substantially in the left-right direction of the vehicle, and connects the left and right upper frames 25.

  The lower bridge frame 28 is installed on the front curved portions of the left and right lower frames 24. The lower bridge frame 28 extends substantially linearly between the left and right lower frames 24 in the left-right direction of the vehicle, and connects the left and right lower frames 24.

  The guard frame 29 is installed on the rear curved portions of the left and right lower frames 24. The guard frame 29 extends rearward and downward from a connection portion with the left and right lower frames 24 and extends in a U-shape that is rearwardly lowered so as to enlarge the internal space of the frame 11. Further, the guard frame 29 is provided with a center stand 33 for allowing the electric motorcycle 1 to stand upright in an upright state. The center stand 33 swings between a standing position where the electric motorcycle 1 is self-supporting and a storage position along the vehicle body 5 so as not to interfere with traveling.

  The upper down frame 22 is constructed between the head pipe 21 and the upper bridge frame 27. The lower down frame 23 has an upper end connected to a central portion in the left-right direction of a bridge frame 34 in the vicinity of the head pipe that extends between the upper portions of the left and right lower frames 24 and extends substantially linearly in the left-right direction of the vehicle. And a lower end portion connected to the central portion of the lower bridge frame 28 in the left-right direction.

  The mounted device protection frame 30 is provided on the upper part of the rear half of the upper frame 25 and supports the fuel cell 2 on the vehicle body of the electric motorcycle 1. Further, a part of the on-board device protection frame 30 is detachably provided on the upper frame 25.

  The seat 13 extends back and forth so as to cover the upper part of the rear half of the frame 11. The seat 13 is a tandem type, and integrally includes a front half 13a for seating a passenger and a rear half 13b for seating the passenger. Further, the seat 13 includes an inclined portion 13c between the front half portion 13a and the rear half portion 13b.

  Here, a space surrounded by the left and right upper frames 25 and the left and right lower frames 24 is referred to as a center tunnel region 35, and a space surrounded by the latter half of the upper frame 25, the exterior 12 and the seat 13 is referred to as a device mounting region 36. Further, a space behind the center tunnel region 35 and below the device mounting region 36 is referred to as a tire house region 37.

  The center tunnel region 35 accommodates the fuel tank 15. In the scooter type electric motorcycle 1 according to the present embodiment, the center tunnel region 35 is provided along the front-rear direction of the vehicle between the left and right footboards 31 on which the rider puts his / her foot. The region bulges upward from the foot board 31 so as to divide the region left and right. In other words, the footboards 31 serving as footrest areas are arranged on the left and right sides of the center tunnel area 35, and the fuel tank 15 is arranged between the left and right footboards 31.

  The device mounting area 36 accommodates the secondary battery 16, the power management device 17, and the fuel cell 2 in order from the front side of the vehicle body 5. The device mounting area 36 is protected by the mounted device protection frame 30 at the front end, the center, the rear end, and the side from the center to the rear end.

  The mounted device protection frame 30 surrounds the device mounting area 36 and protects the devices mounted in the device mounting area 36. The mounted device protection frame 30 is provided at the front end portion of the device mounting region 36, and includes a front protective frame 30 a that is erected upwardly between the left and right upper frames 25, and a central portion of the device mounting region 36. A central protective frame 30b provided on the rear side of the joining point between the upper frame 25 and the lower frame 24, and erected upwardly between the left and right upper frames 25 in a convex arch shape; 36 is provided at the rear end of each of the left and right upper frames 25 and is connected to a portion that curves inward, and a pair of left and right rear protection frames 30c extending obliquely rearward and upward from the curved portion, and left and right of the central protection frame 30b. A pair of left and right side protection frames 30d extending rearward from each other and connected to the upper end of the rear protection frame 30c and reaching the rear end of the vehicle body 5; And a, and a bracket 30e that spans between the rear edges of the protective frame 30d.

  The left and right upper frames 25 are bent at a portion where the lower end of the front protective frame 30a is joined to increase the distance toward the rear of the vehicle, and are bent at a portion where the lower end of the central protective frame 30b is joined. It extends to. For this reason, the center protection frame 30b is wider and higher in height than the front protection frame 30a. The rear protection frame 30c and the pair of left and right side protection frames 30d are integrated. The rear protection frame 30c and the pair of left and right side protection frames 30d are detachably connected to the central protection frame 30b and the upper frame 25 to support the fuel cell 2.

  A rear wheel 8 is disposed in the tire house region 37. Further, a partition wall member (not shown) that divides each region is provided between the device mounting region 36 and the tire house region 37.

  The exterior 12 includes a front leg shield cover 41 that covers the front half of the vehicle body 5, a front frame cover 42 that is disposed at the upper center of the vehicle body 5 and covers the upper frame 25 such as the center tunnel region 35, and the rear half of the vehicle body 5. And a frame cover 43 that covers the lower portion of the seat 13 among the side surfaces of the vehicle body 5 such as the device mounting area 36.

  The frame cover 43 surrounds the device mounting area 36 together with the seat 13. The device mounting area 36 is a closed space surrounded by the seat 13, the frame cover 43, and the partition member. In the device mounting area 36, air flow to the fuel cell 2 is easily and reliably controlled by a vent (not shown) provided at an appropriate position of the frame cover 43 or the partition member, and cooling is required. The flow of air as cooling air to the device is controlled easily and reliably. The device mounting area 36 allows air to enter from the joints of the covers (front frame cover 42, frame cover 43, etc.).

  The steering mechanism 7 is disposed in front of the vehicle body 5 and swings in the left-right direction around the head pipe 21 of the frame 11 so that the front wheels 6 can be steered. The steering mechanism 7 includes a handle 45 provided at the top, and a pair of left and right front forks 46 that connect the handle 45 and the front wheel 6 and extend slightly inclined up and down. The left and right front forks 46 have an elastically telescopic structure. An axle (not shown) that rotatably supports the front wheel 6 as a driven wheel is installed at the lower ends of the left and right front forks 46. A front fender 47 is disposed above the front wheel 6. The front fender 47 is between the left and right front forks 46 and is fixed to the front fork 46.

  The swing arm 9 swings up and down around a pivot shaft 26 extending in the left-right direction of the vehicle body 5. The swing arm 9 rotatably supports the rear wheel 8 between a pair of arm portions extending in the front-rear direction on the left and right sides of the vehicle body 5. A rear suspension 48 is installed between the frame 11 and the swing arm 9. The upper end portion of the rear suspension 48 is swingably supported by the rear end portion of the upper frame 25. The lower end of the rear suspension 48 is swingably attached to the rear end of the swing arm 9. The rear suspension 48 buffers swinging of the swing arm 9. A rear fender 49 is disposed above the rear wheel 8.

  The swing arm 9 also houses a motor 3 that rotates the rear wheel 8 and an inverter 18 that converts the DC power supplied from the fuel cell 2 into AC power and supplies it to the motor 3. The motor 3 rotates the rear wheel 8 with electric power supplied from the fuel cell 2 or the secondary battery 16. The motor 3 is housed in the rear part of the swing arm 9 and is arranged coaxially with the axle of the rear wheel 8. Further, the motor 3 is integrally assembled with the swing arm 9 to constitute a unit swing type swing arm. The inverter 18 is accommodated in the front portion of the swing arm 9 and is disposed between the pivot shaft 26 and the motor 3. The rear wheel 8 is a driving wheel supported by an axle (not shown) to which driving force is transmitted from the motor 3.

(Fuel supply system)
An electric motorcycle 1 as a fuel cell vehicle includes a fuel supply system 50 inside a vehicle body 5. The fuel supply system 50 includes a fuel tank 15 that stores hydrogen of fuel used for power generation in the fuel cell 2 in a high-pressure gas state. As shown in FIGS. 4 and 5, the fuel tank 15 includes a pressure vessel 55 that is a carbon fiber reinforced plastic (CFRP) container or an aluminum liner composite container, a fuel filling member 57 having a fuel filling port 56, A tank valve 63 as a valve device incorporating a fuel filling source valve 58 and a fuel supply source valve 59 and a secondary pressure reducing valve 64 are provided.

  The pressure vessel 55 stores hydrogen gas as fuel for the fuel cell 2, for example, hydrogen gas of about 70 MPa. The pressure vessel 55 includes a cylindrical body portion 55a and a dome-shaped end plate 55b integrally provided on front and rear end surfaces of the body portion 55a. Is arranged in the center tunnel region 35 along the line. That is, as shown in FIGS. 2 and 3, the pressure vessel 55 is surrounded by the pair of upper frames 25, the pair of lower frames 24, the lower bridge frame 28, and the guard frame 29, and the electric motorcycle 1 falls over. Robustly protected against impacts and impact loads.

  The pressure vessel 55 is installed between the upper frame 25 disposed on one side of the vehicle body 5, for example, the right side of the vehicle body 5, and the lower frame 24 disposed on the other side of the vehicle body 5, for example, the left side of the vehicle body 5. The clamp band 61 is supported by the center tunnel region 35. More specifically, the pressure vessel 55 is placed on a lower clamp band (lower half of the clamp band 61) installed between the right upper frame 25 and the left lower frame 24, and an upper clamp band (clamp band). 61 is clamped at the upper half). The clamp band 61 may be provided between the upper frame 25 disposed on the left side of the vehicle body 5 and the lower frame 24 disposed on the right side of the vehicle body 5.

  The fuel filling member 57 is disposed outside the center tunnel region 35, specifically, behind the center tunnel region 35 and at the front end of the device mounting region 36. The fuel filling member 57 is disposed above or directly above the secondary battery 16. Further, the fuel filling member 57 is fixed to a filling bracket 30f provided between the upper part of the front protection frame 30a of the mounted equipment protection frame 30 and the upper part of the central protection frame 30b. Further, the fuel filling member 57 extends toward the upper side of the vehicle body 5 and slightly to the left so that a facility-side fuel supply member (not shown) can be inserted from the upper side and the left side of the vehicle body at the time of fuel filling. The fuel filling port lid 62 (FIG. 1) is covered and provided. The fuel filling port lid 62 is supported by the seat 13 so as to be openable and closable via a hinge mechanism (not shown). The fuel filling member 57 has a fuel filling port 56 as an inlet for introducing hydrogen high-pressure gas as fuel into the fuel tank 15.

  The fuel filling port 56 is provided at the top of the fuel filling member 57 and faces the upper left of the vehicle body 5. When the fuel is filled into the pressure vessel 55 of the fuel tank 15, the upper portion of the fuel filling port 56 is opened to the atmosphere in a state where the fuel filling port lid 62 is opened. Therefore, when the high pressure fuel gas (hydrogen gas) as fuel is filled in the pressure vessel 55 of the fuel tank 15, even if the high pressure fuel gas (hydrogen gas) leaks, the leaked fuel does not stay and the electric motorcycle 1 does not stay. Is diffused upward.

  A tank valve 63 as a main stop valve assembly of a hydrogen-based component that incorporates a fuel filling source valve 58 and a fuel supply source valve 59 is provided on a rear end plate of the pressure vessel 55 as shown in FIGS. It is installed at the top of 55b and arranged in the space surrounded by the guard frame 29 at the rear of the center tunnel region 35. The fuel supply source valve 59 includes a shut-off valve and a primary pressure reducing valve, both not shown. The shutoff valve of the fuel supply source valve 59 and the fuel filling source valve 58 are open / close valves using electromagnetic valves. Further, the primary pressure reducing valve and the secondary pressure reducing valve 64 of the fuel supply source valve 59 adjust the pressure of the high pressure fuel gas from the pressure vessel 55 by sequentially reducing the pressure. The tank valve 63 and the secondary pressure reducing valve 64 constitute a hydrogen system component of the fuel supply system 50 that supplies the fuel gas of the fuel cell 2.

  As shown in FIGS. 2 and 3, the secondary battery 16 of the electric motorcycle 1 is a box-shaped lithium ion battery. The secondary battery 16 is disposed at the front end of the device mounting region 36 and between the rear half and the rear end plate 55 b of the body 55 a of the pressure vessel 55 and the front half 13 a of the seat 13. .

  The electric motorcycle 1 includes a secondary battery (not shown) that supplies, for example, 12V power as a power source for meters (not shown) and lamps (not shown) in addition to the secondary battery 16. Is provided. The second secondary battery is disposed around the head pipe 21, for example, on the right side of the head pipe 21.

  The power management device 17 of the electric motorcycle 1 is disposed between the secondary battery 16 and the fuel cell 2 in the device mounting area 36 and is fixed to the frame 11. The power management device 17 may be disposed in the same waterproof case as the secondary battery 16. In the electric motorcycle 1, by disposing the secondary battery 16, the power management device 17, and the fuel cell 2 as described above, it is possible to dispose devices that are adjacent to each other as close as possible to each other. The wiring length between the devices can be shortened, and the weight related to the wiring can be reduced.

  Further, the vehicle controller 19 of the electric motorcycle 1 includes a head pipe 21 around the head pipe 21 that is relatively high in the electric motorcycle 1, for example, on the opposite side of the second secondary battery that supplies 12V power. It is arranged on the left side of

  Incidentally, in the fuel tank 15 described above, as shown in FIGS. 4 and 5, the tank valve 63 of the main stop valve assembly of the hydrogen-based parts is installed on the rear end plate 55 b of the pressure vessel 55. The fuel filling source valve 58 of the tank valve 63 is connected to the fuel filling member 57 by a fuel filling pipe 65. That is, high-pressure fuel gas supplied from a fuel supply device outside the vehicle is introduced into the fuel filling pipe 65 through the tank valve 63 and into the pressure vessel 55 of the fuel tank 15. The fuel supply source valve 59 (shutoff valve, primary pressure reducing valve) of the tank valve 63 is connected to the secondary pressure reducing valve 64 assembly by the first fuel supply piping 66, and the secondary pressure reducing valve 64 is connected to the second fuel supply piping. 67 is connected to the fuel cell 2.

  High-pressure fuel gas (hydrogen gas) introduced from the fuel filling member 57 via the fuel filling pipe 65 is supplied into the pressure vessel 55 via the fuel filling source valve 58 of the tank valve 63 and filled. The high-pressure fuel gas in the pressure vessel 55 is depressurized by a fuel supply source valve 59 (particularly a primary pressure-reducing valve) of a tank valve 63 of a hydrogen-based component, and again depressurized by a secondary pressure-reducing valve 64 via a first fuel supply pipe 66. Then, the fuel is supplied to the fuel cell 2 through the second fuel supply pipe 67 and the supply side pipe joint 68.

  As shown in FIGS. 6 to 8, a cross member 70 is bridged and fixed at a substantially central position in the vehicle front-rear direction of the pair of left and right upper frames 25, and a hydrogen-based component is located below (directly below) the cross member 70. A tank valve 63 is arranged. Further, a pivot shaft 26 that supports the swing arm 9 in a swingable manner is provided between the left and right brackets 26 a behind the cross member 70. That is, the cross member 70 is disposed along the left-right direction of the vehicle above the tank valve 63, and the pivot shaft 26 (the front end portion of the swing arm 9) is located along the left-right direction of the vehicle above the tank valve 63. Are arranged.

  A filling side pipe joint 73 for connecting the fuel filling pipe 65 to the tank valve 63 is attached to the side surface of the upper notch step portion 71 of the tank valve 63 constituting the hydrogen system part. The fuel filling pipe 65 connected to the filling side pipe joint 73 extends from the filling side pipe joint 73 in the axial direction of the filling side pipe joint 73, and a mounting nut for tightening the tip in the axial direction of the filling side pipe joint 73. It is attached to the front end (left end portion) of the filling side pipe joint 73 by 76. A mounting nut 76 for attaching the fuel filling pipe 65 to the filling side pipe joint 73 is located above the tank valve 63.

  Therefore, the filling side pipe joint 73 is disposed between the cross member 70 installed on the upper frame 25 and the upper notch step portion 71 of the tank valve 63 in the vehicle vertical direction. That is, the cross member 70 is disposed above the filling side pipe joint 73, and the upper surface of the upper notch step portion 71 is disposed below the filling side pipe joint 73. As a result, the tool cannot be engaged with the filling side pipe joint 73 from above and below the vehicle, and unauthorized access of the tool to the filling side pipe joint 73 is prevented, and the filling side pipe joint 73 is protected. The

  The vehicle assembly operation involves connecting the filling side pipe joint 73 and the fuel filling pipe 65 (tightening the mounting nut 76) before the swing arm 9 is attached to the pivot shaft 26. That is, in the state where the swing arm 9 is not present, the tool can be engaged with the filling-side pipe joint 73 from the rear side of the vehicle, and the swinging of the tool, which is the tightening operation of the mounting nut 76, is crossed. It is possible between the member 70 and the upper notch step portion 71, and the connection work of the fuel filling pipe 65 can be easily performed. A supply side pipe joint 74 for connecting the first fuel supply pipe 66 to the tank valve 63 is attached to the inclined surface of the lower notch step 75 of the tank valve 63.

  The swing arm 9 that swings around the pivot shaft 26 installed behind the cross member 70 is disposed behind the filling side pipe joint 73. Further, the front end portion 9a of the swing arm 9 is positioned so as to overlap with the filling side pipe joint 73 when viewed from the vehicle front-rear direction, as shown in FIGS. That is, the upper notch step portion 71, the filling side pipe joint 73, and the cross member 70 are arranged in front of the front end portion 9a of the swing arm 9, and the front end portion of the swing arm 9 is more than the filling side pipe joint 73 in the left-right direction of the vehicle. 9a is located on the side (left side) of the vehicle. Therefore, after connecting the fuel filling pipe 65 to the tank valve 3 by attaching the filling side pipe joint 73 to the side surface of the upper notch step portion 71 of the tank valve 63, the swing arm 9 is attached to the pivot shaft 26. The arm 9 prevents the tool from being engaged with the filling side pipe joint 73 from the rear of the vehicle, preventing unauthorized access of the tool to the filling side pipe joint 73 and protecting the filling side pipe joint 73.

  In addition, since the tank valve 63 is positioned on the right side of the vehicle with respect to the filling side pipe joint 73, the tool cannot be engaged with the filling side pipe joint 73 from the right side of the vehicle. Further, since the fuel filling pipe 65 protrudes in the width direction of the vehicle and the bracket 26a is located on the left side of the vehicle with respect to the filling side pipe joint 73, a tool is engaged with the filling side pipe joint 73 from the left side of the vehicle. It cannot be combined. Further, since the fuel tank 15 is located on the front side of the vehicle with respect to the filling side pipe joint 73, the tool can be engaged with the filling side pipe joint 73 from the front side of the vehicle or the tool can be swung. Can not.

(Fuel cell system)
By the way, the fuel cell 2 mounted on the electric motorcycle 1 is a fuel cell unit that generates electricity by electrochemically reacting a high-pressure gas, for example, hydrogen gas as fuel and oxygen in the air as an oxidant, and cools it using air. Is an air-cooled fuel cell system. The fuel cell 2 as the fuel cell unit is disposed on the rear half side of the device mounting area 36. More specifically, the fuel cell 2 is arranged from the inclined portion 13c between the front half portion 13a and the rear half portion 13b of the seat 13 to the lower side of the rear half portion 13b. That is, as viewed from the side of the vehicle, the fuel cell 2 is disposed between the rear half portion 13 b of the seat 13 on which the passenger is seated, the rear wheel 8 and the swing arm 9.

  Further, as shown in FIG. 9, the fuel cell 2 constituting the fuel cell unit has a rectangular parallelepiped shape having a long side extending in the front-rear direction of the vehicle body 5, and the front surface on which the air inlet 2a is disposed faces obliquely downward in the front direction. The rear surface on which the exhaust port 2b is disposed is disposed at the rear portion of the device mounting area 36 in an inclined posture in which the rear surface is inclined obliquely upward. That is, the fuel cell 2 is fixed to the frame 11 in a forward tilt posture in which the front side is positioned below the rear side. Specifically, the upper part of the fuel cell 2 is fixed to the mounted device protection frame 30, and the lower part of the fuel cell 2 is fixed to the upper frame 25.

  As shown in FIG. 10, the fuel cell 2 includes a plurality of flat modules connected from the front side to the back side. Specifically, the fuel cell 2 includes a filter 80, an intake shutter 81, a fuel cell stack 82 composed of a large number of cells, a fan 83, and an exhaust shutter 84, which are connected in a stacked state in order from the front side. Yes.

  A fuel cell control unit 86 is provided on the top surface of the fuel cell 2 as a fuel cell unit. The fuel cell control unit 86 is composed of electrical components such as a fuel cell controller, a power controller, and a DC / DC converter.

  The intake shutter 81 has an air intake port 2 a that can be freely opened and closed, and controls the amount of air introduced into the fuel cell stack 82 by opening and closing the intake port 2 a and closes the intake port 2 a in the fuel cell 2. A circulation path for circulating air is formed. The exhaust shutter 84 has an air exhaust port 2 b that can be freely opened and closed, and forms a circulation path through which the air is circulated in the fuel cell 2 by closing the exhaust port 2 b. In other words, the fuel cell 2 has an intake port 2a that can be opened and closed on the front side, an exhaust port 2b that can be opened and closed on the back side, and closes the intake port 2a and the exhaust port 2b to remove the air in the fuel cell 2 Circulate.

  The fuel cell stack 82 generates electricity by causing an electrochemical reaction between oxygen contained in the air sucked from the intake port 2a and hydrogen of fuel supplied from the fuel tank 15, and generates wet surplus gas after power generation. . The fan 83 generates a suction negative pressure for sucking the air in the device mounting area 36 into the fuel cell 2 from the suction port 2a, while sucking excess gas from the fuel cell stack 82 and discharging it from the exhaust port 2b. Yes. In addition to being used for power generation in the fuel cell stack 82, the air flow that the fan 83 flows is used for cooling the fuel cell 2.

  An exhaust duct 52 is provided behind the fuel cell 2. The fan 83 of the fuel cell 2 sucks excess gas from the fuel cell stack 82 and discharges purged hydrogen to the exhaust duct 52. The front end of the exhaust duct 52 is airtightly connected to the box of the fuel cell 2 (that is, the frame of the exhaust shutter). The exhaust duct 52 has exhaust ports 52 a and 52 b that are opened toward the rear lower side and the rear upper side at the rear end of the vehicle body 5. The exhaust duct 52 guides exhaust (surplus gas) discharged from the fan 83 of the fuel cell 2 to the exhaust ports 52 a and 52 b and discharges the exhaust to the rear of the vehicle body 5.

  The exhaust port 52 a of the exhaust duct 52 is located above the exhaust surface (back surface) of the fuel cell 2, and is preferably provided at the rear upper end of the exhaust duct 52. Specifically, the upper edge portion of the exhaust port 52 a is disposed at a position higher than the exhaust port of the fuel cell 2. The exhaust duct 52 has an exhaust port 52 a disposed above the exhaust surface (back surface) of the fuel cell 2, thereby leading wet excess gas containing unreacted hydrogen gas to the exhaust port 52 a from the vehicle body 5. Ensure exhaust.

  Further, hydrogen system parts such as the tank valve 63 of the fuel source valve assembly and the secondary pressure reducing valve 64 are intensively arranged at the rear part of the center tunnel region 35. These hydrogen system parts 63 and 64 are arranged in the body of the fuel cell vehicle. It is located on the rear side of the fuel tank 15 placed horizontally in the front-rear direction. The hydrogen-based parts 63 and 64 of the fuel supply system 50 are concentrated on the rear side of the fuel tank 15, and the fuel cell 2 constituting the fuel cell unit is obliquely installed obliquely above and behind the hydrogen-based parts 63 and 64. Installed at.

(Hydrogen dilution device for fuel cell vehicles)
The fuel cell 2 provided at the rear portion of the device mounting area 36 is provided obliquely behind and above the hydrogen-based components 63 and 64 of the fuel supply system 50. A space 89 surrounded by the upper surface of the fuel cell 2, the bottom plate 88 of the seat 12, and the frame covers (vehicle body exterior) 43 on the left and right sides is configured as a dilution intake passage. The seat bottom plate 88 can also serve as a cover 90 that covers the upper part of the entire fuel cell 2 constituting the fuel cell unit. The seat bottom plate 88 is configured such that the rear side of the vehicle is raised, and the front portion thereof reaches the upper part of the hydrogen-based parts 63 and 64 of the fuel supply system 50. The cover 90 may be formed of a separate member without serving as the seat bottom plate 88. The cover 90 extends from the rear side of the front half part 13a of the front side of the fuel cell 2 to the rear part of the rear half part 13b of the rear side of the fuel cell 2, and extends in the rear side of the vehicle so as to smoothly cover the entire fuel cell 2 from above. Constructed in the shape of an umbrella or inverted bowl. A lower portion of the cover 90 is opened downward to constitute a dilution intake duct having an open lower end. Note that the cover 90 may be configured such that the rear side of the vehicle is raised, and the front portion thereof may reach above the hydrogen-based parts 63 and 64 of the fuel supply system 50.

  On the other hand, the fuel cell control unit 86 disposed on the top surface of the fuel cell 2 is composed of electrical components such as a fuel cell controller, a power controller, and a DC / DC converter. The electrical components include heat generating components such as a fuel cell controller and a DC / DC converter. If an electrical component such as a fuel cell controller is abnormally heated, the controller may stop.

  In the hydrogen dilution device 91 of the fuel cell vehicle according to the present embodiment, the dilution intake passage (space) 89 under the cover 90 is configured in a layout structure advantageous for cooling in consideration of the heat generation problem of the fuel cell control unit 86. Is done. The front under the cover 90 opens toward the hydrogen system parts 63 and 64 of the fuel supply system 50 and the front end side of the fuel cell 2, and the dilution fan 92 is installed on the rear side of the vehicle body of the intake passage 89 under the cover 90. Is done. The intake passage 89 under the cover 90 is sized to cover the upper surface of the fuel cell unit, and is opened downward, and has an umbrella-like, inverted saddle-like, or arc-shaped intake passage shape in which the front and rear center part bulges upward. It is configured. The upper portion of the fuel cell control unit 86 is disposed in the intake passage 89 below the cover 90.

  The dilution fan 92 is disposed between the exhaust duct 52 and the seat bottom plate 12b, and is provided at the inlet side top plate portion (the upper portion on the fuel cell 2 side) of the exhaust duct 52. The dilution fan 92 is arranged so as to forcibly suck the air at a high position in the cover 90 where hydrogen is easily collected and blow it into the exhaust duct 52. In the present embodiment, a dilution fan 92 is provided on the duct inflow side top portion (top plate portion) of the exhaust duct 52 in the rear portion of the intake passage 89 constituting the space, whereby the intake passage 89 under the cover 90 is collected. A diluting air flow path for forcibly sending the generated hydrogen into the exhaust duct 52 is formed. It should be noted that a hydrogen detection sensor (not shown) is provided at the ceiling of the intake passage 89 below the cover 90, for example, where hydrogen is likely to accumulate, and an alarm is given when the hydrogen detection sensor detects a reference concentration, for example, a hydrogen concentration of 4% or more. May be issued, or the fuel supply system and the fuel cell may be stopped.

  A flow passage-shaped intake passage 89 under the cover 90 is opened downward so as to cover the upper portion of the fuel cell unit, and is configured to easily collect hydrogen leaking from the fuel cell unit area. A space is formed. Hydrogen leaking from the fuel cell unit area of the hydrogen parts 63 and 64 of the fuel cell 2 and the fuel supply system 50 rises and is collected in the intake passage 89 below the cover 90. The collected hydrogen collects at a high position on the lower surface of the cover 90 and is sucked together with the outside air sucked into the flow passage-shaped intake passage 89 by the fan driving of the dilution fan 92 and blown into the exhaust duct 52.

  Further, in the present embodiment, the fuel cell controller and the electrical components of the DC / DC converter constituting the fuel cell control unit 86 are arranged in a space below the cover 90. Then, by the fan operation of the dilution fan 92 at the rear part in the cover 90, the air around the electrical component is sucked into the intake passage 89 having a flow path shape, and is agitated and blown into the exhaust duct 52.

  The flow path-shaped intake passage 89 in the cover 90 can positively cool each electrical component of the fuel cell control unit 86 with the outside air by the wind generated by the dilution fan 92. Therefore, a dedicated cooling fan for cooling each electrical component of the fuel cell control unit 86 is not required, and the number of components can be reduced and the arrangement space can be reduced.

  In the hydrogen dilution device for a fuel cell vehicle according to the present embodiment, an opening is formed in the upper surface on the inlet side of the exhaust duct 52, and a dilution fan 92 is attached to the opening at the top on the inlet side of the exhaust duct 52. And the cover 90 which covers the upper part of this dilution fan 92 can be shared by the sheet | seat bottom plate 12b extended in the vehicle rear. Therefore, the leakage hydrogen dilution structure of the fuel cell vehicle can be easily configured, and the leakage hydrogen B can be reliably stirred and diluted. Hydrogen leaked from the fuel cell unit area is sucked into an intake passage 89 having a flow path shape under the cover 90 from an opening disposed around the electrical component by using the wind caused by the dilution fan 92 and exhausted. The duct 52 can be agitated and blown.

[Effect of the first embodiment]
In the first embodiment, leaked hydrogen B leaked from the fuel cell unit area is collected in an intake passage 89 having a flow path shape in the cover 90. The intake passage 89 is connected to the exhaust duct 52, and a dilution fan 92 is disposed at a connection portion between the intake passage 89 and the exhaust duct 52, and the hydrogen collected by the dilution fan 92 is sucked together with outside air into the exhaust duct 52. The air can be blown, stirred and diluted in the exhaust duct 52, and discharged to the outside. With the wind generated by the dilution fan 92, the outside air can be actively sucked into the intake passage 89 having a flow path shape, and the electrical components installed on the fuel cell 2 can be actively cooled. The dilution fan 92 may be disposed so as to suck the air in the intake passage 89 into the exhaust duct 52, or may be attached to the cover 90 constituting the intake passage 89.

  In the first embodiment, hydrogen leaked from the fuel cell unit area can be collected in a space in the cover 90 under the seat 13. Since the flow passage-shaped intake passage 89 having a wide inlet is formed in the cover 90, the intake passage 89 can be configured with a large degree of freedom at a position where it is relatively easy to ensure below the seat. Further, the leaked hydrogen B can be reliably collected and sucked into the intake passage 89 having a flow path shape under the cover 90 from the openings arranged around the electrical components.

  In the first embodiment, it is possible to actively cool the electrical components arranged on the top surface of the fuel cell 2 by using the suction force generated by the wind generated by the dilution fan 92 to flow outside air around the electrical components. This eliminates the need for each cooling fan dedicated to electrical components, thereby reducing the number of components and the space for arrangement.

  In the first embodiment, the dilution fan 92 is attached to the opening on the upper surface on the inlet side of the exhaust duct 52, and the cover 90 covering the upper side of the dilution fan 92 can be used also by the seat bottom plate 12b extending rearward of the vehicle. The structure for collecting and diluting hydrogen can be simplified, and the leaked hydrogen can be reliably diluted and diffused in the exhaust duct 52 by using the entrainment air generated by the dilution fan 92.

[Second Embodiment]
Next, a second embodiment of the hydrogen dilution apparatus for a fuel cell vehicle will be described with reference to FIGS.

  The hydrogen dilution device 100 of the fuel cell vehicle according to the second embodiment is applied to an electric motorcycle, like the hydrogen dilution device 91 of the first embodiment, and the configuration is shown in FIGS. 1 to 8. Since it is not different from the configuration of the electric motorcycle 1 of the first embodiment, the same components are denoted by the same reference numerals, and redundant descriptions are omitted or simplified.

  The hydrogen dilution apparatus 100 for the fuel cell vehicle according to the second embodiment is configured such that the layout relationship is shown in the principle explanatory diagram of FIG. The air blower 101 introduces cooling air outside air A into the fuel cell 2A constituting the fuel cell unit. The fuel cell 2A is supplied with hydrogen as fuel gas from the hydrogen system parts 63 and 64 of the fuel supply system 50 and air as oxidant gas from the outside air A, and generates DC power by an electrochemical reaction. Exhaust hydrogen B from the fuel cell 2A is discharged to the exhaust duct 52 from the back side, and is discharged to the outside through the exhaust passages 52a and 52b through the exhaust passage.

  On the other hand, a dilution intake duct 102 that constitutes a cover that covers the fuel cell 2A from above is installed above the rear portion of the fuel cell 2A. The intake duct 102 is configured in an umbrella shape, an inverted saddle shape, or an arc shape, and a dilution intake flow path is formed inside the duct, and a wide open outside air inlet is provided below.

  In the dilution intake duct 102, electrical components of the fuel cell control unit 86 such as a fuel cell controller 86a and a DC / DC converter 86b are installed. A dilution fan 92 is provided downstream of the intake duct 102 at the rear of the vehicle. The dilution intake duct 102 opens into the exhaust hydrogen dilution box 103 (space) of the exhaust duct 52 through the dilution fan 92. Therefore, the heat dissipating part that generates heat is exposed to the intake flow path of the dilution intake duct 102 in the electrical component 86, thereby improving the cooling function of the electrical component 86.

  Specifically, the hydrogen dilution device 100 of the fuel cell vehicle is configured as shown in FIG. FIG. 12 has a side sectional structure similar to that of the hydrogen dilution device 91 of the fuel cell vehicle according to the first embodiment shown in FIG.

  In the fuel cell vehicle 1 of the second embodiment, a rectangular box-shaped fuel cell 2 </ b> A constituting a fuel cell unit is installed in an oblique state at the rear of the device mounting area 36. The fuel cell 2 </ b> A is disposed obliquely above and behind the hydrogen-based parts 63 and 64 of the fuel supply system 50. An electrical component 86 such as a fuel cell controller is installed on the top surface of the fuel cell 2 </ b> A, and a dilution intake duct 102 is provided so as to cover the upper part of the electrical component of the fuel cell control unit 86. The intake duct 102 constitutes a cover that is curved in an umbrella shape or an inverted saddle shape that covers the upper part of the electrical component 86, and the outside of the duct is widely opened to form an outside air inlet. Outside air A from the outside air inlet and leaked hydrogen C leaking from the fuel cell unit area are collected in the intake duct 102 for dilution. The upper part of the intake flow path in the dilution intake duct 102 constitutes an area D where leakage hydrogen C is expected to stay.

  In addition, a dilution fan 92 is installed downstream of the dilution intake duct 102 and the dilution intake passage formed in the intake duct 102 has an exhaust duct 52 on the back side of the fuel cell 2A as shown in FIG. Communicated within. The exhaust duct 52 includes a space (exhaust hydrogen dilution box) through which the exhaust hydrogen B is discharged from the fuel cell 2A, and a dilution fan 92 and an opening for introducing leaked hydrogen C and outside air A are provided in this space. The dilution intake duct 102 is communicated with an opening above the exhaust duct 52.

  Furthermore, the heat radiating part of the fuel cell control part 86, which is an electrical component, is exposed to the intake passage of the dilution intake duct 102. The electrical component 86 is exposed to the outside air sucked into the dilution intake duct 102 and actively cooled. Therefore, by installing the electrical component 86 in the intake duct 102, there is no need for a cooling system dedicated to the electrical component 86, and the power consumption and noise of the electrical component cooling system can be reduced.

  By the way, in the hydrogen dilution device 100 of the fuel cell vehicle, hydrogen-based parts 63 and 64 of the fuel supply system 50 are provided in front of and under the fuel cell 2A constituting the fuel cell unit. Hydrogen leaked due to damage or breakage of each hydrogen-based component 63, 64 or leaked hydrogen C from the fuel cell unit rises in the fuel cell unit area. The leaked hydrogen C from the fuel cell unit area rises and is sucked together with outside air A and collected in the dilution intake duct 102 which is a cover.

  The cover-shaped dilution intake duct 102 covering the upper side of the fuel cell 2 </ b> A is installed so as to overlap the bottom plate 88 of the seat 13. The dilution intake duct 102 extends from the rear side of the seat front half portion 13 a to the middle of the seat rear half portion 13 b toward the vehicle rear side, and an intake flow path is formed in the intake duct 102.

  As shown in FIG. 14, the dilution intake duct 102 has an umbrella-shaped or inverted saddle-shaped cover portion facing the heat radiating portion of the electrical component 86, and the outside air A is placed in the gap between the heat radiating portion of the electrical component and the cover portion. By passing through, the electrical component can be actively cooled. The outside air introduction port of the dilution intake duct 102 is provided within a required height, for example, within about 10 cm from the uppermost part of the partition wall where the hydrogen stays. As a result, the leaked hydrogen C collected in the dilution absorption duct 102 is positively sucked into the exhaust duct 52 by the suction force of the dilution fan 92 and blown into the space of the exhaust duct 52. And are reliably discharged to the outside through the exhaust ports 52a and 52b.

[Effects of Second Embodiment]
In the hydrogen dilution device 100 for the fuel cell vehicle according to the second embodiment, the fuel cell control unit installed on the fuel cell 2A has the same effects as the hydrogen dilution device 91 described in the first embodiment. An umbrella-shaped or inverted saddle-shaped dilution air intake duct 102 is provided so as to cover 86 electrical components. The lower part of the intake duct 102 is widely open, and leaked hydrogen C leaking from the fuel cell unit area is collected together with the outside air A in the intake passage of the intake duct 102. The collected leaked hydrogen C is taken up by the dilution fan 92 and blown into the exhaust duct 52, diluted and stirred in the space in the exhaust duct 52, and reliably discharged to the outside. Accordingly, the leaked hydrogen C from the fuel cell unit is reliably released outside the vehicle body without staying in the vehicle body.

  At that time, the air cooled by the outside air A is forcibly sucked through the gap between the heat dissipating part and the cover part of the electrical component 86 by the dilution fan 92 provided in the dilution intake duct 102. The heat radiating part of the component 86 is actively cooled. This eliminates the need for a dedicated cooling system for the electrical components, thereby reducing the power consumption and noise of the electrical component cooling system.

  In the hydrogen dilution device 100 for the fuel cell vehicle according to the second embodiment, it is possible to reliably prevent the leakage hydrogen C from staying. For this reason, the freedom degree on the layout of the electrical component 86 installed on the fuel cell 2A can be improved.

[Third Embodiment]
FIG. 15 is a simplified plan cross-sectional view showing a third embodiment of a hydrogen dilution apparatus for a fuel cell vehicle.

  In describing the hydrogen dilution apparatus 110 of the fuel cell vehicle according to the third embodiment, the same components as those of the hydrogen dilution apparatus 100 of the second embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The hydrogen dilution device 110 of the fuel cell vehicle according to the third embodiment is provided with a dilution fan 92 on the inlet side of the dilution intake duct 102A constituting the cover. The lower part of the dilution intake duct 102A is widely open, and is installed so as to cover the electrical components of the fuel cell control unit 86 installed on the fuel cell 2A of the fuel cell unit from above. The dilution intake duct 102A extends from the upper side of the fuel cell 2A to the rear side of the vehicle body so that the width of the intake passage is reduced, and the rear end of the duct passes through the opening 113 in the space of the exhaust duct 52 (exhaust hydrogen dilution box). It is communicated to.

  The hydrogen dilution device 110 of the third embodiment collects leaked hydrogen C that leaks upward from the fuel cell unit area in the intake flow path of the dilution intake duct 102A, and the collected leaked hydrogen C is The outside air A sucked by the dilution fan 92 is mixed and diluted in the intake passage, passes through the opening 113 at the rear end of the duct, and is blown into the exhaust duct 52. The leaked hydrogen C blown to the exhaust duct 52 is stirred and diluted again in the space of the exhaust duct 52 and discharged to the outside from the exhaust ports 52a and 52b.

  Also in the hydrogen dilution apparatus 110 of the third embodiment, the heat radiation part of the electrical components of the fuel cell control part 86 is actively cooled by the outside air A that is forcibly sucked into the dilution intake duct 102A. The third embodiment has the same operational effects as the second embodiment.

  As described above, the embodiment of the present invention shows an example in which the hydrogen dilution devices 91, 100, and 110 of the fuel cell vehicle are applied to the electric motorcycle. However, the hydrogen dilution device of the fuel cell vehicle is an electric motorcycle. However, the present invention can be applied to a front two-wheel or rear two-wheel electric tricycle.

  Each embodiment of the present invention is presented as an example, and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Electric motorcycle (fuel cell vehicle), 2 ... Fuel cell (fuel cell unit), 3 ... Motor (electric motor), 5 ... Vehicle body, 6 ... Front wheel, 7 ... Steering mechanism, 8 ... Rear wheel, 9 ... Swing arm, DESCRIPTION OF SYMBOLS 11 ... Frame, 12 ... Exterior, 13 ... Seat, 15 ... Fuel tank, 16 ... Secondary battery, 17 ... Power management device, 18 ... Inverter, 19 ... Vehicle controller, 21 ... Head pipe, 22 ... Upper down frame, 23 ... Lower down frame, 24 ... Lower frame, 25 ... Upper frame, 26 ... Pivot shaft, 27 ... Upper bridge frame, 28 ... Lower bridge frame, 29 ... Guard frame, 30 ... Mounted equipment protection frame, 31 ... Footboard, 35 ... center tunnel area, 36 ... equipment mounting area, 37 ... tire house area, 41 ... front leg shield cover, 42 ... Frame cover, 43 ... frame cover, 45 ... handle, 46 ... front fork, 47 ... front fender, 48 ... rear suspension, 49 ... rear fender, 50 ... fuel supply system, 52 ... exhaust duct, 55 ... pressure vessel, 56 ... Fuel filling port, 57 ... Fuel filling member, 58 ... Fuel filling source valve, 59 ... Fuel supply source valve, 61 ... Clamp band, 62 ... Fuel filling port lid, 63 ... Tank valve (hydrogen parts), 64 ... Two Next pressure reducing valve (hydrogen system part), 65 ... fuel filling pipe, 66 ... first fuel supply pipe, 67 ... second fuel supply pipe, 68 ... supply side pipe joint (pipe joint), 70 ... cross member 71 ... upper notch Step part 73 ... Filling side pipe joint, 74 ... Supply side pipe joint, 75 ... Lower notch step part, 76 ... Mounting nut, 80 ... Filter, 81 ... Intake shutter 82 ... Fuel cell stack, 83 ... Fan, 84 ... Exhaust shutter, 86 ... Fuel cell control part (electrical parts), 88 ... Seat bottom plate, 89 ... Intake passage (dilution air passage), 90 ... Cover (intake for dilution) Duct), 91 ... Hydrogen dilution device for fuel cell vehicle, 92 ... Dilution fan, 100, 110 ... Hydrogen dilution device for fuel cell vehicle, 101 ... Blower fan, 102, 102A ... Intake duct (cover) for dilution, 103 ... Exhaust Hydrogen dilution box.

Claims (6)

A fuel cell vehicle having an exhaust duct for guiding exhaust from a fuel cell unit mounted on the vehicle to the rear of the vehicle body,
A cover for collecting hydrogen leaking from the fuel cell unit is provided above the fuel cell unit,
A hydrogen dilution apparatus for a fuel cell vehicle, comprising a dilution fan that sucks air in the cover and blows air into the exhaust duct. The cover is configured to have a curved shape that covers the upper surface of the fuel cell unit from above, and the cover is open at the bottom, and the center portion is formed to bulge upward so that the cover is between the fuel cell unit and the seat. The hydrogen dilution apparatus for a fuel cell vehicle according to claim 1, which is arranged. The cover extends under the seat to the rear of the vehicle and is covered with the fuel cell unit from above,
The hydrogen diluting device for a fuel cell vehicle according to claim 1 or 2, wherein an opening communicating with the exhaust duct is provided at a rear end portion of the cover. Electrical components are arranged in the cover,
The hydrogen dilution apparatus for a fuel cell vehicle according to claim 1, wherein air around the electrical component is sucked by the dilution fan. The dilution fan is provided in an opening formed on the upper surface of the exhaust duct,
2. The hydrogen dilution apparatus for a fuel cell vehicle according to claim 1, wherein the cover extends rearward of the vehicle and covers the dilution fan. The cover constitutes an air intake duct for dilution,
The hydrogen dilution apparatus for a fuel cell vehicle according to claim 1, wherein a dilution fan is provided on an inlet side of the dilution intake duct.

Images