Hydrogen engine vehicles

Abstract

This facilitates the installation of large-capacity hydrogen tanks. [Solution] A hydrogen engine vehicle 10 equipped with a hydrogen engine 13 is provided with hydrogen tanks 18A to 18D into which hydrogen is injected from a hydrogen inlet 20 installed on one side thereof, and a urea water tank 19 for storing urea water injected from a urea water inlet 21 installed on one side thereof, and is configured to be installed in the portion between the hydrogen engine 13 and the hydrogen tanks 18A to 18D in the front-rear direction of the vehicle.

Description

Technical Field

[0001] The present invention relates to a hydrogen engine vehicle.

Background Art

[0002] Patent Document 1 describes a hydrogen engine vehicle in which a hydrogen tank is arranged at the rear of the vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a hydrogen engine, when hydrogen burns, nitrogen and oxygen in the air react to generate nitrogen oxides (NOx). In order to purify such NOx, it is conceivable to install a urea SCR (Selective Catalytic Reduction) system for purifying NOx in a hydrogen engine vehicle equipped with a hydrogen engine. A hydrogen engine vehicle equipped with a urea SCR system is provided with a urea water tank for storing urea water and a urea water pipe for sending urea water from the urea water tank to the exhaust pipe. On the other hand, in order to extend the cruising range of a hydrogen engine vehicle, it is necessary to increase the capacity of the hydrogen tank. However, in the case of a hydrogen engine vehicle equipped with a urea SCR system, since the installation of the urea water tank and the urea water pipe takes up space, the capacity of the hydrogen tank that can be installed may be limited.

Means for Solving the Problems

[0005] A hydrogen engine vehicle that solves the above problems is a hydrogen engine vehicle equipped with a hydrogen engine, comprising: a hydrogen inlet installed on the side of the hydrogen engine vehicle; a hydrogen tank for storing hydrogen injected from the hydrogen inlet; a urea water inlet installed on the side of the hydrogen engine vehicle; and a urea water tank for storing urea water injected from the urea water inlet, wherein the urea water tank is installed in the portion between the hydrogen engine and the hydrogen tank in the longitudinal direction of the vehicle. [Effects of the Invention]

[0006] The above-mentioned hydrogen engine vehicle has the advantage of facilitating the installation of large-capacity hydrogen tanks. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 shows the arrangement of components of a hydrogen engine vehicle according to the first embodiment, as viewed from below the vehicle. [Figure 2] Figure 2 shows the arrangement of the hydrogen and urea water inlets as viewed from the left side of the hydrogen engine vehicle shown in Figure 1. [Figure 3] Figure 3 shows the arrangement of components of a hydrogen engine vehicle according to the second embodiment, configured as a hybrid vehicle, as viewed from below the vehicle. [Modes for carrying out the invention]

[0008] (First Embodiment) The first embodiment of the hydrogen engine vehicle will now be described in detail with reference to Figures 1 and 2. The hydrogen engine vehicle 10 of this embodiment has a rear-engine layout in which the hydrogen engine 13 is installed at the rear of the vehicle. Furthermore, the hydrogen engine vehicle 10 of this embodiment employs a rear-wheel drive system in which the hydrogen engine 13 powers the left and right rear wheels 12 of the four wheels (left and right front wheels 11 and left and right rear wheels 12) to propel the vehicle. In each figure, the directions indicated by the arrows are as follows: "FR" indicates the front of the vehicle, "RR" indicates the rear of the vehicle, "LH" indicates the left side of the vehicle, "RH" indicates the right side of the vehicle, "UP" indicates the top of the vehicle, and "DW" indicates the bottom of the vehicle.

[0009] <Configuration of the drivetrain of hydrogen engine vehicle 10> First, the configuration of the drive system of the hydrogen engine vehicle 10 will be explained with reference to Figure 1. Figure 1 shows the arrangement of the drive system components of the hydrogen engine vehicle 10 as seen from below the vehicle.

[0010] As shown in Figure 1, the hydrogen engine 13 is installed in the hydrogen engine vehicle 10 in a portion of the vehicle behind the rear wheels 12. The hydrogen engine 13 is connected to the left and right rear wheels 12 via the transmission 14 and differential 15. The exhaust pipe 16 of the hydrogen engine 13 is equipped with a catalytic converter 17 that purifies nitrogen oxides in the exhaust gas by selective catalytic reduction using urea as a reducing agent. In the hydrogen engine vehicle 10 of this embodiment, the exhaust pipe 16 and catalytic converter 17 are installed on the right side of the vehicle relative to the hydrogen engine 13.

[0011] <Arrangement of tanks and filler ports for hydrogen engine vehicle 10> The hydrogen engine vehicle 10 is equipped with a hydrogen inlet 20, which is the inlet for hydrogen to be burned in the hydrogen engine 13, and hydrogen tanks 18A to 18D for storing the hydrogen injected from the hydrogen inlet 20. The hydrogen engine vehicle 10 is also equipped with a urea water inlet 21, which is the inlet for urea water to be added to the exhaust gas flowing into the catalytic converter 17 of the hydrogen engine 13, and a urea water tank 19 for storing the urea water injected from the urea water inlet 21. The urea water tank 19 is generally made of resin.

[0012] Next, with reference to Figures 1 and 2, the arrangement of the hydrogen tanks 18A to 18D, the urea water tank 19, the hydrogen inlet 20, and the urea water inlet 21 in the hydrogen engine vehicle 10 of this embodiment will be described. Figure 1 shows their arrangement as viewed from below the vehicle, and Figure 2 shows their arrangement as viewed from the left side of the vehicle.

[0013] The hydrogen engine vehicle 10 of this embodiment is equipped with four hydrogen tanks 18A to 18D. Each of the hydrogen tanks 18A to 18D is installed in a row in the width direction of the vehicle under the floor of the hydrogen engine vehicle 10 in the portion of the vehicle that is behind the front wheels 11 and in front of the rear wheels 12. Here, "under the floor" refers to the portion of the vehicle below the floor surface of the passenger compartment of the hydrogen engine vehicle 10, or in other words, the space under the passenger compartment floor. In the case of this hydrogen engine vehicle 10, the hydrogen inlet 20 is connected to the hydrogen tank 18A, which is located furthest to the left of the four hydrogen tanks 18A to 18D, via a hydrogen injection pipe 20A. The remaining three hydrogen tanks 18B to 18D are configured to receive hydrogen from hydrogen tank 18A.

[0014] On the other hand, the urea water tank 19 is installed under the floor of the hydrogen engine vehicle 10 in the portion of the vehicle that is rearward from each of the hydrogen tanks 18A to 18D, and in front of the axle of the rear wheel 12. The urea water tank 19 is connected to the urea water inlet 21 via the urea water injection pipe 21A. In the hydrogen engine vehicle 10 of this embodiment, the urea water tank 19 is installed in the portion of the vehicle to the left of the hydrogen engine 13 in the vehicle width direction of the hydrogen engine vehicle 10.

[0015] Furthermore, the hydrogen inlet 20 is located on the side of the hydrogen engine vehicle 10. In the hydrogen engine vehicle 10 of this embodiment, the hydrogen inlet 20 is located on the left side of the hydrogen engine vehicle 10, in a portion behind the front wheel 11 and in front of the rear wheel 12. On the other hand, the urea water inlet 21 is located on the side of the hydrogen engine vehicle 10, in a portion behind the hydrogen inlet 20. In the hydrogen engine vehicle 10 of this embodiment, the urea water inlet 21 is located on the left side of the hydrogen engine vehicle 10, in a portion behind the front wheel 11 and in front of the rear wheel 12. In addition, the hydrogen inlet 20 and the urea water inlet 21 are located in separate lids 22 and 23, respectively. The lids 22 and 23 are openable and closable covers provided on the side of the hydrogen engine vehicle 10.

[0016] As shown in Figure 1, the hydrogen engine vehicle 10 of this embodiment is equipped with a cargo compartment 24 for carrying luggage. The cargo compartment 24 is located under the floor of the hydrogen engine vehicle 10 in the area between the hydrogen tanks 18A to 18D and the left side of the hydrogen engine vehicle 10, located behind the front wheels 11 and in front of the rear wheels 12, in the vehicle width direction.

[0017] <Effect of the Embodiment> In this embodiment, the hydrogen engine vehicle 10 has a hydrogen engine 13 mounted at the rear of the vehicle. A hydrogen inlet 20 is installed on the left side of the hydrogen engine vehicle 10. A urea water inlet 21 is installed on the left side of the hydrogen engine vehicle 10, in the portion of the vehicle rearward from the hydrogen inlet 20. Under the floor of the hydrogen engine vehicle 10, there are hydrogen tanks 18A to 18D for storing hydrogen injected from the hydrogen inlet 20, and a urea water tank 19 for storing urea water injected from the urea water inlet 21. The urea water tank 19 is located in the portion of the vehicle rearward from the hydrogen tanks 18A to 18D. The urea water tank 19 is also installed in the underfloor space of the passenger compartment of the hydrogen engine vehicle 10, in the vehicle width direction, to the left of the hydrogen engine 13. In contrast, the exhaust pipe 16 and catalytic converter 17 are installed to the right of the hydrogen engine 13.

[0018] Also, in the case of the hydrogen engine vehicle 10 of the present embodiment, the exhaust pipe 16 and the catalytic device 17 are installed on the right side of the vehicle of the hydrogen engine 13. On the other hand, the urea water tank 19 is installed in a portion on the left side of the vehicle in the vehicle width direction with respect to the hydrogen engine 13. Here, the portion on the left side of the vehicle in the vehicle width direction with respect to the hydrogen engine 13 is defined as the left side portion of the vehicle, and the portion on the right side of the vehicle with respect to the hydrogen engine 13 is defined as the right side portion of the vehicle. Thus, the hydrogen engine vehicle 10 of the present embodiment is configured such that the exhaust pipe 16 and the catalytic device 17 are located in one of the two portions of the right side portion and the left side portion of the vehicle, and the urea water tank 19 is located in the other portion.

[0019] In addition, in such a present embodiment, the right side of the vehicle among the left side and the right side of the vehicle corresponds to the first side which is the side of the hydrogen engine 13 where the exhaust pipe 16 and the catalytic device 17 are installed. Also, the left side of the vehicle among the left side and the right side of the vehicle corresponds to the second side.

[0020] <Effect of the Embodiment> The hydrogen engine vehicle 10 of the present embodiment has the following effects. (1) In the case of the hydrogen engine vehicle 10 of the present embodiment, it is installed in the portion between the hydrogen tanks 18A to 18D and the hydrogen engine 13 in the vehicle front-rear direction. In contrast, consider the case where the hydrogen tanks 18A to 18D are installed in the portion between the urea water tank 19 and the hydrogen engine 13 in the vehicle front-rear direction. In this case, since the pipe for sending the urea water from the urea water tank 19 to the hydrogen engine 13 passes through the portion where the hydrogen tanks 18A to 18D are installed, the installation space of the hydrogen tanks 18A to 18D may be restricted by that pipe. In contrast, in the case of the hydrogen engine 13 of the present embodiment, the urea water tank 19 is arranged closer to the hydrogen engine 13 than the hydrogen tanks 18A to 18D. Therefore, it is possible to avoid a decrease in the installation space of the hydrogen tanks 18A to 18D due to the pipe for the urea water. Thus, the hydrogen engine vehicle 10 of the present embodiment has the effect of facilitating the installation of the large-capacity hydrogen tanks

[0021] (2) When the urea water is transported through near the hydrogen tanks 18A to 18D for storing low-temperature hydrogen, the urea water may be cooled. Therefore, measures such as heat insulation and heat preservation of the pipes may be required. In the case of the hydrogen engine vehicle 10 of the present embodiment, since the urea water tank 19 is installed at a location closer to the hydrogen engine 13 than the hydrogen tanks 18A to 18D, an increase in component costs for heat insulation and heat preservation of the pipes for transporting the urea water can be suppressed.

[0022] (3) The positional relationship in the vehicle front-rear direction of the inlets of hydrogen and urea water is the same as the positional relationship in the vehicle front-rear direction of the tanks for storing the hydrogen / urea water injected from the inlets. Further, the urea water inlet 21 is installed on the side surface of the hydrogen engine vehicle 10 that is closer to the urea water tank 19 among the left and right side surfaces. Therefore, the pipe lengths of the hydrogen injection pipe 20A and the urea water injection pipe 21A can be shortened. The shorter the pipe lengths of those injection pipes, the smaller the occupied space of those injection pipes in the under-floor space of the vehicle compartment. Therefore, more installation space can be allocated to the hydrogen tanks 18A to 18D. Thus, the hydrogen engine vehicle 10 of the present embodiment has the effect of facilitating the installation of the large-capacity hydrogen tanks 18A to 18D.

[0023] (4) Among the four hydrogen tanks 18A to 18D, the hydrogen tank 18A directly connected to the hydrogen inlet 20 via the hydrogen injection pipe 20A is installed at a portion close to the left side surface of the hydrogen engine vehicle 10 where the hydrogen inlet 20 is installed. Also by this, since the pipe length of the hydrogen injection pipe 20A can be shortened, the installation space of the hydrogen tanks 18A to 18D can be further increased.

[0024] (5) While the exhaust pipe 16 and the catalyst device 17 are installed on the right side of the vehicle of the hydrogen engine 13, the urea water tank 19 is installed at a portion on the left side of the vehicle in the vehicle width direction of the hydrogen engine vehicle 10 rather than the hydrogen engine 13. Since the urea water tank 19 is arranged at a site away from the exhaust pipe 16 and the catalyst device 17 which are heat source components of the hydrogen engine vehicle 10, deterioration of the urea water tank 19 due to heat damage can be suppressed.

[0025] (6) A cargo compartment 24 for loading luggage is provided under the floor of the hydrogen engine vehicle 10 in the area between the hydrogen tanks 18A to 18D and the left side of the vehicle in the vehicle width direction, located behind the front wheels 11 and in front of the rear wheels 12. The cargo compartment 24 functions as a buffer space, which can mitigate the impact on the hydrogen tanks 18A to 18D in the event of a side collision.

[0026] (7) Hydrogen tanks 18A to 18D are installed in a position behind the front wheels 11 and in front of the rear wheels 12. Therefore, the impact on the hydrogen tanks 18A to 18D during frontal and rear collisions of the hydrogen engine vehicle 10 can be mitigated.

[0027] (Second Embodiment) Next, a second embodiment of the hydrogen engine vehicle 10 will be described in detail with reference to Figure 3. In this embodiment, components common to the above-described embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0028] Figure 3 shows the arrangement of components of the hydrogen engine vehicle 10 of this embodiment, as viewed from below the vehicle. The hydrogen engine vehicle 10 of this embodiment is configured as a hybrid vehicle equipped with a hydrogen engine 13 and a motor 30 that generates driving force in response to power supplied from a battery 32. The hydrogen engine vehicle 10 of this embodiment has the same configuration as the first embodiment except for the drive system.

[0029] As shown in Figure 3, in the hydrogen engine vehicle 10 of this embodiment, the hydrogen engine 13 is connected to the left and right rear wheels 12 via the transmission 14 and transfer case 31. A motor 30 is installed in front of the transfer case 31. The motor 30 is connected to the left and right rear wheels 12 via the transfer case 31. Furthermore, the hydrogen engine vehicle 10 is equipped with a battery 32 that stores the power supplied to the motor 30. The battery 32 is located to the right of the motor 30. Thus, in the hydrogen engine vehicle 10 of this embodiment, the motor 30 and battery 32 are arranged side by side in the vehicle width direction in the space under the floor of the passenger compartment, behind the hydrogen tanks 18A to 18D and in front of the hydrogen engine 13. In addition, in the hydrogen engine vehicle 10 of this embodiment, the battery 32 is installed closer to the right side than the left side where the urea water inlet 21 is installed.

[0030] <Effects of the Embodiment> In addition to the effects described in (1) to (7) above, the hydrogen engine vehicle 10 of this embodiment also provides the following further effects.

[0031] (8) In the hydrogen engine vehicle 10 of this embodiment, the battery 32 is installed together with the urea water tank 19 in the rear part of the vehicle, beyond the hydrogen tanks 18A to 18D. The urea water tank 19 is installed on the right side of the hydrogen engine vehicle 10, near where the urea water inlet 21 is installed, and the battery 32 is installed on the left side, near where the urea water inlet 21 is not installed. Therefore, the hydrogen tanks 18A to 18D, the urea water tank 19 and the battery 32 can be efficiently installed in the space under the floor of the passenger compartment.

[0032] (9) The battery 32 is located behind the front wheels 11 and in front of the rear wheels 12. Therefore, the impact on the battery 32 during a frontal or rearward collision of the hydrogen engine vehicle 10 can be mitigated.

[0033] (10) The battery 32 and motor 30 are arranged side by side in the width direction of the vehicle and located under the floor. Because the battery 32 and motor 30 are in close proximity, they can be connected with a short cable. This reduces the cost and weight of the cable and makes cable routing easier.

[0034] (Other embodiments) The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0035] The arrangement of the drive system, including the motor 30, in the hydrogen engine vehicle 10 of the second embodiment may differ from that shown in Figure 3. For example, the motor 30 may be placed at the front of the vehicle, driving the front wheels 11 with the motor 30, while the rear wheels 12 are driven solely by the hydrogen engine 13.

[0036] The arrangement of the battery 32 may also be different from that shown in Figure 3. In the hydrogen engine vehicle 10 of the above embodiment, a luggage compartment 24 was provided in the left portion of the underfloor space of the passenger compartment. However, the luggage compartment 24 may be provided in the right portion of the vehicle, or it may be provided in both the left and right portions of the vehicle. Alternatively, the hydrogen engine vehicle 10 may be configured without an underfloor luggage compartment 24.

[0037] The number of hydrogen tanks 18A to 18D may be changed, or their arrangement may be altered. The urea solution inlet 21 may be installed on the right side of the hydrogen engine vehicle 10. In that case, it is desirable that the urea solution tank 19 be installed on the right side of the hydrogen engine vehicle 10, closer to the urea solution inlet 21 installed than to the left side where the urea solution inlet 21 is not installed.

[0038] Alternatively, the exhaust pipe 16 and catalytic converter 17 may be installed on the left side of the hydrogen engine 13, and the urea solution inlet 21 may be installed on the right side of the hydrogen engine vehicle 10. In this case as well, the length of the urea solution inlet 21A can be shortened by installing the urea solution tank 19 closer to the right side where the urea solution inlet 21 is installed than to the left side of the hydrogen engine vehicle 10. In this case, the left side of the vehicle corresponds to the first lateral direction, and the right side of the vehicle corresponds to the second lateral direction.

[0039] - When one of the left and right sides of the vehicle is designated as the first side and the other as the second side, the exhaust pipe 16 and catalytic converter 17 may be installed on the first side of the hydrogen engine 13, and the urea water inlet 21 may be installed on the first side of the left and right sides of the hydrogen engine vehicle 10. In this case, the exhaust pipe 16 and catalytic converter 17 and the urea water tank 19 are arranged on the same side in the vehicle width direction of the hydrogen engine vehicle 10. Even in such a case, thermal damage to the urea water tank 19 due to heat radiated from the exhaust pipe 16 and catalytic converter 17 can be suppressed in cases such as (A) to (C) below. (A) When a heat shield is placed between the urea water tank 19 and the exhaust pipe 16 and catalytic converter 17 of the hydrogen engine 13. (B) When the distance between the urea water tank 19 and the exhaust pipe 16 and catalytic converter 17 of the hydrogen engine 13 in the front-rear direction of the vehicle is sufficiently large. (C) When the urea water tank 19 is made of a heat-resistant material.

[0040] The hydrogen inlet 20 and the urea solution inlet 21 may be installed within the same lid. The hydrogen inlet 20 and the urea solution inlet 21 may be installed on different sides of the hydrogen engine vehicle 10.

[0041] <Regarding the arrangement of hydrogen tanks 18A-18D and urea water tank 19> The arrangement of the hydrogen tanks 18A-18D and the urea water tank 19 may be changed as appropriate, provided that the urea water tank 19 is installed in the area between the hydrogen tanks 18A-18D and the hydrogen engine 13 in the longitudinal direction of the vehicle. For example, a portion of the urea water tank 19 may be arranged to overlap with the hydrogen tanks 18A-18D in the longitudinal direction of the vehicle.

[0042] The hydrogen engine vehicle 10 may be configured as a vehicle employing a front-engine vehicle layout in which the hydrogen engine 13 is installed at the front of the vehicle. In this case as well, the effects of (1) and (2) above can be obtained by installing the urea water tank 19 in the portion between the hydrogen tanks 18A to 18D and the hydrogen engine 13 in the longitudinal direction of the vehicle. In this case, the urea water tank 19 is installed in the hydrogen engine vehicle 10 in a portion behind the hydrogen engine 13 and in front of the hydrogen tanks 18A to 18D.

[0043] Here, "the urea water tank 19 is installed in a position further rear than the hydrogen tanks 18A to 18D" means that both of the following conditions (A1) and (A2) are met: (A1) The rear end of the urea water tank 19 is located further rear than the rear ends of the hydrogen tanks 18A to 18D. (A2) The front end of the urea water tank 19 is located further rear than the front ends of the hydrogen tanks 18A to 18D. Conversely, "the urea water tank 19 is installed in a position further forward than the hydrogen tanks 18A to 18D" means that both of the following conditions (B1) and (B2) are met: (B1) The rear end of the urea water tank 19 is located further forward than the rear ends of the hydrogen tanks 18A to 18D. (B2) The front end of the urea water tank 19 is located further forward than the front ends of the hydrogen tanks 18A to 18D. In any case, the urea water tank 19 may be positioned so as not to overlap with the hydrogen tanks 18A to 18D in the vehicle width direction.

[0044] (Additional notes) [Note 1] A hydrogen engine vehicle equipped with a hydrogen engine, comprising: a hydrogen inlet installed on the side of the hydrogen engine vehicle; a hydrogen tank for storing hydrogen injected from the hydrogen inlet; a urea water inlet installed on the side of the hydrogen engine vehicle; and a urea water tank for storing urea water injected from the urea water inlet, wherein the urea water tank is installed in the portion between the hydrogen engine and the hydrogen tank in the longitudinal direction of the vehicle.

[0045] [Note 2] The hydrogen engine vehicle described in Note 1, wherein the urea water tank is installed on one of the left and right sides of the hydrogen engine vehicle, closer to the side on which the urea water inlet is installed than to the side on which the urea water inlet is not installed.

[0046] [Note 3] The hydrogen engine is the hydrogen engine vehicle described in Note 1 or Note 2, which is installed at the rear of the vehicle. [Note 4] The hydrogen engine is connected to an exhaust pipe equipped with a catalytic converter that purifies exhaust gas by selective catalytic reduction using urea water supplied from the urea water tank, and when one of the left and right sides of the vehicle is designated as the first side and the other as the second side, the exhaust pipe and the catalytic converter are installed on the first side of the hydrogen engine, and the urea water inlet is installed on the side of the second side of the hydrogen engine vehicle, as described in any of Notes 1 to 3.

[0047] [Note 5] A hydrogen engine vehicle according to any one of Notes 1 to 4, wherein a cargo compartment for loading luggage is provided under the floor in the portion between the side of the hydrogen engine vehicle and the hydrogen tank in the vehicle width direction, located behind the front wheels and in front of the rear wheels.

[0048] [Note 6] A hydrogen engine vehicle according to any of Notes 1 to 5, wherein a battery is installed in the portion between the hydrogen tank and the hydrogen engine in the longitudinal direction of the vehicle, and in the portion of the left and right sides of the hydrogen engine vehicle that is closer to the side on which the urea water inlet is not installed than to the side on which the urea water inlet is installed.

[0049] [Note 7] The hydrogen engine vehicle according to Note 6, further comprising a motor that generates driving force for the hydrogen engine vehicle by power supplied from the battery, wherein the battery and the motor are arranged side by side in the vehicle width direction. [Explanation of Symbols]

[0050] 10 Hydrogen engine vehicles 11 Front Wheel 12 Rear wheels 13 Hydrogen engine 14 Transmission 15 Differential 16 Exhaust pipe 17 Catalyst device 18A~18D Hydrogen Tanks 19 Urea water tank 20 Hydrogen inlet 21 Urea water inlet 22,23 Lid 24 Luggage compartment 30 motors 31 Transfer 32 batteries

Claims

1. A hydrogen engine vehicle equipped with a hydrogen engine, The hydrogen engine vehicle is equipped with a hydrogen inlet installed on its side, a hydrogen tank for storing the hydrogen injected from the hydrogen inlet, a urea water inlet installed on its side, and a urea water tank for storing the urea water injected from the urea water inlet. The urea water tank is installed in the portion between the hydrogen engine and the hydrogen tank in the longitudinal direction of the vehicle. A cargo compartment for carrying luggage is provided under the floor of the hydrogen engine vehicle, located behind the front wheels, in front of the rear wheels, and between the side of the vehicle and the hydrogen tank in the vehicle width direction. Hydrogen engine vehicle.

2. The hydrogen engine vehicle according to claim 1, wherein the urea water tank is installed on one of the left and right sides of the hydrogen engine vehicle, closer to the side on which the urea water inlet is installed than to the side on which the urea water inlet is not installed.

3. The hydrogen engine vehicle according to claim 1, wherein the hydrogen engine is installed at the rear of the vehicle.

4. The hydrogen engine is connected to an exhaust pipe equipped with a catalytic converter that purifies exhaust gases by selective catalytic reduction using urea water supplied from the urea water tank. When one of the left or right sides of the vehicle is designated as the first side and the other as the second side, the exhaust pipe and the catalytic converter are installed on the first side of the hydrogen engine, and the urea water inlet is installed on the side of the second side of the hydrogen engine vehicle. A hydrogen engine vehicle according to claim 1.

5. The hydrogen engine vehicle according to claim 1, wherein a battery is installed in the portion between the hydrogen tank and the hydrogen engine in the longitudinal direction of the vehicle, and in the portion of the left and right sides of the hydrogen engine vehicle that is closer to the side on which the urea water inlet is not installed than to the side on which the urea water inlet is installed.

6. The hydrogen engine vehicle according to claim 5, further comprising a motor that generates driving force for the hydrogen engine vehicle by power supplied from the battery, wherein the battery and the motor are arranged side by side in the vehicle width direction.

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