JP5291379B2 - Fuel cell vehicle - Google Patents

Description

  The present invention relates to a fuel cell vehicle provided with a hydrogen sensor inspection pipe for detecting hydrogen leakage.

A fuel cell vehicle equipped with a fuel cell system is provided with a hydrogen sensor for detecting hydrogen leakage. Further, since hydrogen has a lower specific gravity than air, it is generally arranged above the fuel cell system. However, if the fuel cell system is disposed above the fuel cell system, the hydrogen sensor cannot be visually recognized by the fuel cell system. For this reason, at the time of inspection of the hydrogen sensor, it is necessary to remove the fuel cell system from the vehicle so that the hydrogen sensor can be visually recognized, and there is a problem that the inspection work of the hydrogen sensor becomes complicated. Therefore, Patent Document 1 proposes a technique that facilitates inspection work by attaching a hydrogen sensor inspection pipe to a vehicle in advance.
Japanese Patent Laying-Open No. 2006-329786 (FIG. 3)

  By the way, in a fuel cell automobile, a fuel cell system (for example, a fuel cell stack, a hydrogen tank, a hydrogen pipe, etc.) is arranged outside the vehicle compartment in order to prevent hydrogen from entering the vehicle compartment. For this reason, the hydrogen sensor is naturally arranged outside the passenger compartment. However, if the hydrogen sensor is arranged outside the passenger compartment, the detection part of the hydrogen sensor is exposed to foreign matter such as water and dust, and the detection of the hydrogen sensor is performed. There was a problem that there was a possibility that accuracy might fall.

  When the inspection pipe is attached to the body via the stay, if the distance from the stay to the hydrogen outlet of the inspection pipe is long, it is difficult to manage the clearance between the hydrogen sensor and the outlet.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a fuel cell vehicle capable of obtaining good detection accuracy even when a hydrogen sensor is disposed outside a vehicle compartment.

The invention according to claim 1 is a fuel cell vehicle in which a fuel cell system is arranged outside a passenger compartment, and a hydrogen sensor that detects hydrogen leakage is provided above the fuel cell system. An inspection gas introduction pipe that extends toward the outside of the battery vehicle, supplies inspection gas to the detection section to inspect the hydrogen sensor, and is provided in the inspection gas introduction pipe. A sensor protection member for preventing exposure , wherein the sensor protection member is provided at the tip of the inspection gas introduction pipe and is plate-shaped and has the inspection gas introduction pipe as an axis. It is bent so as to incline toward the sensor side .

According to the first aspect of the present invention, it is possible to prevent foreign matter (water, dust, etc.) from adhering to the detection part of the hydrogen sensor without newly attaching a protective part for the hydrogen sensor. Therefore, good detection accuracy can be obtained in the hydrogen sensor. In addition, it is possible to effectively prevent foreign matters from adhering to the detection part of the hydrogen sensor. Further, it is possible to prevent foreign matter from adhering to the detection unit of the hydrogen sensor without interfering with other devices. In addition, it is possible to effectively prevent foreign substances from entering from the side of the hydrogen sensor.

The invention according to claim 2 is characterized in that the sensor protection member is configured to overlap the entire detection unit when the detection unit of the hydrogen sensor is viewed from the front. According to this, since the entire front surface of the detection unit of the hydrogen sensor is covered, it is possible to more effectively prevent foreign matter from adhering to the detection unit of the hydrogen sensor.

The invention according to claim 3 is characterized in that the sensor protection member has a filter that has air permeability and does not allow water droplets to pass therethrough. According to this, since the sensor protection member does not block the leaked hydrogen, the detection accuracy of the hydrogen sensor is not impaired.

According to a fourth aspect of the present invention, there is provided a fuel cell vehicle in which a fuel cell system is disposed outside a passenger compartment, and a hydrogen sensor that detects hydrogen leakage is provided above the fuel cell system. An inspection gas introduction pipe that extends toward the outside of the battery vehicle, supplies inspection gas to the detection section to inspect the hydrogen sensor, and is provided in the inspection gas introduction pipe. A sensor protection member for preventing exposure, wherein the sensor protection member protrudes in a radial direction of the inspection gas introduction pipe and is formed in a collar shape . According to this, it is possible to prevent water from adhering to the hydrogen sensor through the inspection gas introduction pipe.

The invention according to claim 5 is characterized in that the sensor protection member is configured to abut against a vehicle body. According to this, even if the inspection gas introduction pipe is slightly bent during transportation, the sensor protection member becomes a positioning member, and the clearance between the hydrogen sensor and the discharge port of the inspection gas introduction pipe is ensured for the inspection. it can.

  According to the present invention, it is possible to provide a fuel cell vehicle with good detection accuracy even if the hydrogen sensor is arranged outside the vehicle compartment.

  FIG. 1 shows the arrangement of the fuel cell system in the fuel cell vehicle of the present embodiment, (a) is a perspective side view, (b) a perspective top view, FIG. 2 is a block diagram showing the fuel cell system, and FIG. FIG. 4 shows the shape of the sensor protection member when the inspection gas introduction pipe provided with the members and the surrounding arrangement are viewed from the rear of the vehicle, and FIG. 4A shows the detection part of the hydrogen sensor from the front side. (B) is a cross-sectional view taken along line AA, which is the radial direction of the inspection gas introduction pipe, and (c) is a line BB, which is the direction along the inspection gas introduction pipe. FIG. 5 is a perspective view showing an example of the internal structure of the hydrogen sensor.

  As shown in FIG. 1 (a), the fuel cell vehicle 1 of this embodiment includes a fuel cell system 10, a hydrogen sensor 20, an inspection gas introduction pipe 30A, a sensor protection member 40A (see FIG. 3), and the like. Yes. The fuel cell vehicle 1 is divided into a vehicle interior Q1 and a vehicle exterior Q2 by a floor panel 2, and a fuel cell system 10 is disposed outside the vehicle interior Q2 below the floor panel 2. The vehicle interior Q1 means a space including a passenger compartment and a cargo room, and the vehicle interior Q2 means a portion excluding the vehicle interior Q1. Further, the floor panel 2 is configured so that hydrogen leaking from the fuel cell system 10 installed outside the vehicle interior Q2 does not flow into the vehicle interior Q1.

  The fuel cell system 10 includes a fuel cell 11, an auxiliary machine 12, a hydrogen tank module 13, a hydrogen supply pipe 14, and the like. The fuel cell 11 and the auxiliary machine 12 are disposed in a convex center console 2a1 formed on the front floor panel 2a on the front side of the floor panel 2, and the hydrogen tank module 13 is arranged on the rear floor panel on the rear side of the floor panel 2. 2b is disposed horizontally between the rear wheel RW and the rear wheel RW (see FIG. 1B). The rear floor panel 2b is formed so as to be convexly convex upward so that a part of the rear floor panel 2b follows the tank shape of the hydrogen tank module 13.

  In addition, the fuel cell 11 and the auxiliary machine 12 are fixed on the subframe 15, and the subframe 15 is attached to a vehicle body (main frame, not shown) on the floor panel 2 side. The hydrogen tank module 13 is fixed on a subframe 16 together with a rear suspension (not shown) and the like, and the subframe 16 is attached to a vehicle body (not shown) on the floor panel 2 side.

  The hydrogen tank module 13 includes a high-pressure hydrogen tank, a primary cutoff valve, a primary pressure reducing valve, and the like. The high-pressure hydrogen tank is a cylindrical container filled with high-purity hydrogen at a very high pressure. The primary shut-off valve is, for example, an in-tank type and is an electromagnetically operated type having a solenoid. The primary pressure reducing valve has a function of reducing the high pressure hydrogen from the high pressure hydrogen tank to a predetermined pressure.

  The hydrogen supply pipe 14 connects the auxiliary machine 12 and the hydrogen tank module 13, and constitutes a flow path for introducing hydrogen supplied from the hydrogen tank module 13 into the auxiliary machine 12.

  The fuel cell 11 is a polymer electrolyte fuel cell, in which a plurality of unit cells are stacked in the thickness direction, the electrolyte membrane being sandwiched between an anode and a cathode containing a catalyst, and further sandwiched between a pair of conductive separators. It has a structure.

  As shown in FIG. 2, the auxiliary machine 12 is an anode auxiliary machine that supplies the hydrogen supplied from the hydrogen tank module 13 to the anode of the fuel cell 11, and includes a secondary shutoff valve 12a, a secondary pressure reducing valve 12b, An ejector 12c, a purge valve 12d, and the like are included. The secondary shutoff valve 12a is, for example, an electromagnetically operated type having a solenoid, and closes when a malfunction occurs in the secondary pressure reducing valve 12b or the like. The secondary pressure reducing valve 12b has a function of reducing the hydrogen pressure reduced by the primary pressure reducing valve to a lower predetermined pressure. The ejector 12c is a kind of vacuum pump that recirculates the unreacted hydrogen discharged from the anode of the fuel cell 11 by supplying it to the anode again. The purge valve 12d has a function of, for example, periodically opening and discharging impurities (nitrogen, generated water, etc.) accumulated in the anode circulation path.

  The fuel cell system 10 has a cathode auxiliary machine that supplies compressed air introduced from an air compressor (not shown) to the cathode of the fuel cell 11. The cathode auxiliary machine is, for example, a humidifier for humidifying air supplied from an air compressor. Further, a diluter (not shown) is provided on the downstream side of the purge valve 12d. The diluter is configured to dilute the hydrogen discharged from the anode side with the cathode off gas and discharge it outside the vehicle. Yes.

  In the fuel cell 11, hydrogen (fuel gas) is supplied to the separator facing the anode, and air (oxidant gas) is supplied to the separator facing the cathode. As a result, at the anode, electrons are separated from hydrogen by the action of the catalyst, hydrogen ions (protons) pass through the electrolyte membrane to the cathode, and the electrons move to the cathode through an external load (for example, a traveling motor). To do. At the cathode, water is generated by the reaction of hydrogen ions, electrons, and oxygen in the air.

  As shown in FIG. 3, the hydrogen sensor 20 has a function of detecting hydrogen leakage from the fuel cell system 10, and is provided on the ceiling surface of the floor panel 2 (rear floor panel 2 b) above the hydrogen tank module 13. The detection units 21 and 21 are attached so as to face downward. That is, the hydrogen sensor 20 is in a position that cannot be confirmed from the lower side of the vehicle when the hydrogen tank module 13 is attached. Since the specific gravity of hydrogen is much smaller than that of air, the hydrogen sensor 20 is provided at a position where hydrogen is most likely to accumulate (for example, the highest position) when hydrogen leaks. The internal structure of the hydrogen sensor 20 will be described later with reference to FIG.

  The inspection gas introduction pipe 30 </ b> A constitutes a flow path for introducing hydrogen at the time of inspection of the hydrogen sensor 20 and blowing the inspection gas to the detection units 21, 21 of the hydrogen sensor 20, and the tip portion is in front of the hydrogen sensor 20. And the base end portion extends toward the outside of the vehicle. The inspection gas introduction pipe 30A in the present embodiment extends toward the left side in the vehicle width direction along the wall surface of the floor panel 2 (rear floor panel 2b), and the rear wheel RW and the tire house cover (not shown) are removed. Sometimes, the tip portion is formed to extend to a position where it can be seen from the side of the vehicle.

  Note that the length of the inspection gas introduction pipe 30A is not limited to the present embodiment. For example, the length of the inspection gas introduction pipe 30A may be shorter if the position can be viewed by removing the rear wheel RW and the tire house cover. Good.

  Further, the inspection gas introduction pipe 30A is configured such that the arrangement direction of the detection units 21 and 21 of the hydrogen sensor 20 and the axial direction of the inspection gas introduction pipe 30A coincide. The inspection gas introduction pipe 30 </ b> A is supported by stays 31, 31, and each stay 31 is screwed to the floor panel 2 by a screw 32. The arrangement direction of the detection units 21 and 21 and the axial direction of the inspection gas introduction pipe 30A are not limited to coincide with each other, and may be arranged to be orthogonal to each other.

  Each stay 31 is configured such that a harness 41 for supplying electric power to the hydrogen sensor 20 and acquiring a detection signal from the hydrogen sensor 20 is supported by a support member 42. One end of the harness 41 is connected to a connector portion 20a provided in the case of the hydrogen sensor 20, and the other end is connected to a control portion (not shown). Further, the inspection gas introduction pipe 30A and the stay 31 are fixed by welding or the like, and when the inspection gas introduction pipe 30A is fixed to the floor panel 2, the discharge port 30a (described later in FIG. 4) is detected. It faces the part 21 side.

  As shown in FIG. 4A, a sensor protection member 40A is provided at the tip of the inspection gas introduction pipe 30A. The sensor protection member 40A is formed, for example, in an elliptical plate shape. When the sensor protection member 40A is viewed from the front with respect to the detection units 21 and 21 of the hydrogen sensor 20, the sensor protection member 40A covers the entire detection units 21 and 21. It is comprised so that it may overlap, ie, the whole detection parts 21 and 21 may be covered. Further, a discharge port 30a is formed at a position facing each detection unit 21 at the tip of the inspection gas introduction pipe 30A.

  As shown in FIGS. 4B and 4C, the detection unit 21 and the inspection gas introduction pipe 30A are arranged apart from each other by a predetermined distance. The predetermined distance can be appropriately selected according to the hydrogen concentration used for the inspection gas (hydrogen). However, since hydrogen has high diffusibility, it is preferable to discharge it in the vicinity of the detection unit 21.

  As shown in FIG. 5, the hydrogen sensor 20 has a cylindrical space serving as a gas detection chamber Q. In the gas detection chamber Q, a reference detection element 50A (detection unit), a common detection element 50B (detection unit), and It has. Note that an opening 20b (see FIG. 3) is formed on the tip (lower surface) of the cylindrical body at a position facing the reference detection element 50A and the common detection element 50B, and this opening 20b serves as a hydrogen intake port. .

  The reference detection element 50A and the common detection element 50B are each constituted by a pair of a detection element 51 and a temperature compensation element 52. The detection element 51 and the temperature compensation element 52 are arranged close to each other, and the reference detection element 50A and the common detection element 50B are also arranged close to each other. The detection element 51 is a well-known element, and is formed by coating a coil 51a of metal wire containing platinum or the like having a high temperature coefficient with respect to electric resistance with a carrier such as alumina carrying a catalyst 51b. The catalyst 51b is made of a noble metal that is active against a gas to be detected such as hydrogen. The temperature compensation element 52 is inactive to the gas to be detected. For example, the surface of the coil 52a equivalent to the detection element 51 is covered with a carrier such as alumina. When the detection element 51 becomes high due to the reaction heat generated when the gas to be detected (hydrogen) comes into contact with the catalyst 51b, a difference occurs in the resistance value of the detection element 51 and the temperature compensation element 52, and the hydrogen concentration is detected from this difference. can do. Note that the change in electrical resistance value due to the ambient temperature is offset by using the temperature compensation element 52.

  In the present embodiment, since the hydrogen sensor 20 is provided on the floor panel 2 above the hydrogen tank module 13, it is assumed that the primary shutoff valve of the hydrogen tank module 13, the seal portion of the primary pressure reducing valve, and the hydrogen supply pipe 14 Even if hydrogen leaks from a joint or the like, the hydrogen leak is immediately detected by the hydrogen sensor 20. When hydrogen leak is detected, the driver is notified by a warning sound or a warning lamp (not shown).

  As an inspection procedure of the hydrogen sensor 20 in the fuel cell vehicle 1 of the present embodiment, for example, the vehicle is jacked up and one rear wheel RW and a tire house cover (not shown) are removed. Thereby, the base end of the inspection gas introduction pipe 30A can be visually recognized. And in the state which started the hydrogen sensor 20, hydrogen as inspection gas is supplied from opening of the base end part of 30 A of inspection gas introduction piping. The supplied hydrogen passes through the inspection gas introduction pipe 30 </ b> A, and is discharged from the discharge ports 30 a and 30 a at the tip toward the detection units 21 and 21. In this way, it can be confirmed whether the hydrogen sensor 20 is functioning normally.

  According to the present embodiment, since the sensor protection member 40A is provided in the inspection gas introduction pipe 30A, it is not necessary to newly attach a sensor protection component for the hydrogen sensor 20. In addition, since foreign matter such as water and dust can be blocked by the sensor protection member 40A on the detection unit 21 of the hydrogen sensor 20, adhesion of water and dust to the hydrogen sensor 20 can be prevented.

  In the present embodiment, the sensor protection member 40A is arranged so as to overlap the detection units 21 and 21 of the hydrogen sensor 20 when the hydrogen sensor 20 is viewed from the front. It is possible to effectively prevent water and dust from adhering.

  In the present embodiment, since the sensor protection member 40A is formed in a plate shape, it does not interfere with other devices, and adhesion of water and dust to the detection unit 21 can be prevented.

  Note that the present invention is not limited to the above-described embodiment, and may be configured as shown in FIGS. 6 to 8, for example. FIGS. 6A and 6B are perspective views showing other embodiments of the sensor protection member, FIG. 7 is a cross-sectional view schematically showing the function of the sensor protection member made of a filter, and FIGS. b) is a sectional view showing still another embodiment of the sensor protection member. In addition, about the structure similar to above-described embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The embodiment shown in FIG. 6 has a configuration in which a sensor protection member 40B is used instead of the sensor protection member 40A. As shown in FIGS. 6A and 6B, the sensor protection member 40B is formed to be bent in a V-shaped cross section so as to be inclined toward the hydrogen sensor 20 with a pipe as an axis. According to this embodiment, it is possible to prevent water or dust from adhering to the detection unit 21 of the hydrogen sensor 20 from the side. Note that the sensor protection member 40B in this case may also be configured to overlap the entire detection units 21 and 21 when the hydrogen sensor 20 is viewed from the front, as in the above-described embodiment.

  In the embodiment shown in FIG. 7, the sensor protection member 40C is used instead of the sensor protection member 40A. As shown in FIG. 7, the sensor protection member 40C is formed of a filter that can transmit water vapor (has air permeability) but cannot transmit water (water droplets). As the sensor protection member 40C having such a function, for example, a water repellent filter or a ventilation filter can be used. Since a filter having both water repellency and air permeability can be used to transmit hydrogen, during running (power generation), such as water drops or dust on the detection unit 21 of the hydrogen sensor 20 The adhesion can be blocked and the hydrogen detection accuracy of the hydrogen sensor 20 is not impaired.

  The embodiment shown in FIGS. 8A and 8B has a configuration in which sensor protection members 40D and 40E are added to the sensor protection member 40A. As shown in FIG. 8A, the sensor protection member 40D is formed in a collar shape on the inspection gas introduction pipe 30A upstream of the sensor protection member 40A. The sensor protection member 40D is formed in a substantially semicircular shape, and is formed so as to protrude in the radial direction of the inspection gas introduction pipe 30A. In addition, although embodiment shown in FIG. 8 is the structure which provided both the sensor protection members 40A, 40D, and 40E, only sensor protection members 40D and 40E may be sufficient. Further, the sensor protection member 40D is not limited to one place, and may be provided at a plurality of places.

  Further, as shown in FIG. 8B, the sensor protection member 40E is formed in a collar shape, and is formed integrally with the stay 31 that supports the inspection gas introduction pipe 30A. In a configuration where the harness 41 and the inspection gas introduction pipe 30A are close to each other, such as when the harness 41 and the stay 31 of the inspection gas introduction pipe 30A are shared, the sensor protection member is attached to the harness 41 side. Also good.

  According to the sensor protection members 40D and 40E shown in FIG. 8, the water droplets flowing through the inspection gas introduction pipe 30A can be blocked from flowing to the hydrogen sensor 20 side, so that the water droplets adhere to the detection unit 21 of the hydrogen sensor 20. Can be prevented. In addition, according to this embodiment, when the base end side (inspection gas introduction side) of the inspection gas is provided so as to be positioned above the hydrogen sensor 20 with respect to the height direction, the inspection gas introduction is performed. It is possible to particularly effectively prevent water droplets traveling along the pipe 30 </ b> A from adhering to the detection unit 21. In addition, according to this embodiment, the detection unit 21 of the hydrogen sensor 20 is attached upward and the inspection gas is blown from the upper side of the hydrogen sensor 20.

  In FIG. 8, the sensor protection members 40D and 40E are formed in a brim shape. However, the sensor protection members 40D and 40E may have any configuration that can block water droplets transmitted through the inspection gas introduction pipe 30A. It may be configured to be bent in a letter shape.

  Moreover, as shown to Fig.9 (a), you may form so that the surface 40s of sensor protection member 40D, 40E may face the surface 2c of the floor panel 2 (body). That is, if the length from the stay 31 (see FIG. 8) of the inspection gas introduction pipe 30A to the discharge port 30a is long, the clearance between the hydrogen sensor 20 and the discharge port 30a is managed (basically, the stay 31 is manufactured. Although it is difficult to control the welding angle and the position of the sensor, the sensor protection members 40D and 40E are configured to abut against the floor panel 2 so that the hydrogen sensor 20 is attached to the vehicle, and then the inspection gas introduction pipe 30A is installed. Even if the portion from the stay 31 to the tip (discharge port 30a) is slightly bent during transportation, the sensor protection members 40D and 40E function as positioning members, so the clearance CL between the hydrogen sensor 20 and the discharge port 30a (see FIG. 9 (b)) can be secured for the necessary distance for inspection.

  Further, as shown in FIG. 9 (b), by setting the distance L between the sensor protection members 40D, 40E and the hydrogen sensor 2 to be short, the distance CL required for checking the clearance CL between the hydrogen sensor 20 and the discharge port 30a. This is advantageous over the case where the hydrogen sensor 20 and the sensor protection members 40D and 40E are separated from each other.

  In the above-described embodiment, the inspection gas introduction pipe 30A extending in the vehicle width direction has been described as an example. However, the present invention is not limited to this, and as shown in FIG. The inspection gas introduction pipe 30B extending forward along 13 high-pressure hydrogen tanks may be used, or as shown in FIG. 10B, the inspection gas introduction pipe 30C extending rearward along the high-pressure hydrogen tank may be used.

  Further, in the present embodiment, the case where the hydrogen sensor 20 is provided on the hydrogen tank module 13 side has been described as an example. Similarly, on the ceiling surface of the floor panel 2 (front floor panel 2a) on the upper side of the fuel cell 11. A configuration may be provided in which an inspection gas introduction pipe including a sensor protection member 40A and the like is provided so as to extend from the attached hydrogen sensor.

  Further, in the present embodiment, the case where the inspection gas introduction pipe 30 </ b> A provided with the sensor protection member 40 </ b> A is attached to the floor panel 2 has been described as an example, but the sensor protection member 40 </ b> A is added to the high-pressure hydrogen tank of the hydrogen tank module 13. A gas introduction pipe for inspection provided with may be attached.

The arrangement | positioning of the fuel cell system in the fuel cell vehicle of this embodiment is shown, (a) is a see-through | perspective side view, (b) is a see-through | perspective top view. It is a block diagram which shows a fuel cell system. It is a perspective view which shows arrangement | positioning of the gas introduction piping for an inspection provided with the sensor protection member, and its periphery. The shape of the sensor protection member is shown, (a) is a plan view when the detection part of the hydrogen sensor is viewed from the front side, and (b) is cut along the AA line that is the radial direction of the inspection gas introduction pipe. (C) is sectional drawing when it cut | disconnects by the BB line which is a direction along the gas introduction piping for inspection. It is a perspective view which shows an example of the internal structure of a hydrogen sensor. (A), (b) is a perspective view which shows other embodiment of a sensor protection member, respectively. It is sectional drawing which shows typically the function of the sensor protection member consisting of a filter. (A), (b) is sectional drawing which shows other embodiment of a sensor protection member, respectively. The modification of the sensor protection member shown in FIG. 8 is shown, (a) is a top view, (b) is a side view. (A), (b) is a side view which shows other embodiment of the gas introduction piping for inspection, respectively.

Explanation of symbols

1 Fuel cell vehicle (fuel cell vehicle)
2 Floor panel 10 Fuel cell system 13 Hydrogen tank module 20 Hydrogen sensor 21 Detector 30A-30C Gas introduction piping for inspection 40A-40E Sensor protection member Q1 Car interior Q2 Car exterior

Claims (5)

In a fuel cell vehicle in which a fuel cell system is disposed outside a passenger compartment, and a hydrogen sensor that detects hydrogen leakage is provided above the fuel cell system,
An inspection gas introduction pipe that extends from the detection unit of the hydrogen sensor toward the outside of the fuel cell vehicle, supplies an inspection gas to the detection unit, and inspects the hydrogen sensor;
A sensor protection member provided in the inspection gas introduction pipe to prevent the detection unit from being exposed to foreign matter, and
The sensor protection member is provided at a tip portion of the inspection gas introduction pipe and is plate-shaped and bent so as to incline toward the hydrogen sensor with the inspection gas introduction pipe as an axis. Fuel cell vehicle. 2. The fuel cell vehicle according to claim 1 , wherein the sensor protection member is configured to overlap the entire detection unit when the detection unit of the hydrogen sensor is viewed from the front. 3. The fuel cell vehicle according to claim 1, wherein the sensor protection member has a filter that has air permeability and does not allow water droplets to pass therethrough. 4. In a fuel cell vehicle in which a fuel cell system is disposed outside a passenger compartment, and a hydrogen sensor that detects hydrogen leakage is provided above the fuel cell system,
An inspection gas introduction pipe that extends from the detection unit of the hydrogen sensor toward the outside of the fuel cell vehicle, supplies an inspection gas to the detection unit, and inspects the hydrogen sensor;
A sensor protection member provided in the inspection gas introduction pipe to prevent the detection unit from being exposed to foreign matter, and
The fuel cell vehicle , wherein the sensor protection member is formed in a collar shape so as to protrude in a radial direction of the inspection gas introduction pipe . The fuel cell vehicle according to claim 4 , wherein the sensor protection member is configured to abut against a vehicle body.

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