Hydrogen supply system and hydrogen internal combustion engine

Abstract

The hydrogen supply system comprises a hydrogen storage tank, the hydrogen storage tank is connected with an air inlet of the engine through a first ventilation pipeline, a first containing space and a second containing space are formed in the hydrogen storage tank, the first containing space is used for storing hydrogen and communicated with the first ventilation pipeline, and the second containing space is used for storing hydrogen and communicated with the second ventilation pipeline. The second accommodating space is communicated with the second ventilation pipeline, and the volumes of the first accommodating space and the second accommodating space are adjustably arranged, so that gas is added into the second accommodating space through the second ventilation pipeline, the volume of the second accommodating space is increased, and the volume of the first accommodating space is reduced; thus, the pressure of hydrogen in the first containing space can be increased, and the problem that in the prior art, residual hydrogen in a hydrogen supply system cannot be utilized by a hydrogen internal combustion engine, and consequently the comprehensive heat efficiency of a whole vehicle is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen internal combustion engines, in particular to a hydrogen supply system and a hydrogen internal combustion engine. Background Art

[0002] At present, the existing technology of direct injection of hydrogen internal combustion engines in cylinders eliminates the problem of hydrogen occupying cylinder volume by direct injection, greatly improving the power of hydrogen internal combustion engines. Compared with intake port injection, direct injection hydrogen internal combustion engines can inject after the intake valve is closed to avoid hydrogen backflow into the intake port and cause flashback. Under the same working conditions, direct injection hydrogen internal combustion engines can adopt a leaner combustion method, thereby reducing pumping losses and improving thermal efficiency.

[0003] However, hydrogen internal combustion engines that use direct injection have certain requirements for hydrogen supply pressure. Under normal circumstances, hydrogen is supplied according to a pressure closed loop. When the pressure is lower than the threshold, the hydrogen supply is stopped. However, there is still a certain amount of hydrogen in the cylinder at this time, and this part of hydrogen cannot be used, which reduces the mileage and reduces the efficiency of the internal combustion engine. At the same time, the remaining hydrogen cannot be used and occupies the vehicle mass, reducing the overall thermal efficiency of the vehicle. Utility Model Content

[0004] The main purpose of the utility model is to provide a hydrogen supply system and a hydrogen internal combustion engine to solve the problem in the prior art that the residual hydrogen in the hydrogen supply system cannot be used by the hydrogen internal combustion engine, resulting in low comprehensive thermal efficiency of the whole vehicle.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a hydrogen supply system is provided, including a hydrogen storage tank, which is connected to the air intake of the engine through a first ventilation pipeline, and has a first storage space and a second storage space therein, respectively. The first storage space is used to store hydrogen, the first storage space is connected to the first ventilation pipeline, and the second storage space is connected to the second ventilation pipeline. The volumes of the first storage space and the second storage space can be adjusted, so that gas can be added to the second storage space through the second ventilation pipeline to increase the volume of the second storage space, so that the volume of the first storage space can be reduced, and then the pressure of the hydrogen in the first storage space can be increased.

[0006] Furthermore, the hydrogen supply system also includes: a compressor connected to the second ventilation pipeline for providing gas to the second storage space; a first pressure sensor arranged on the second ventilation pipeline close to the second storage space, and the first pressure sensor is used to detect the pressure value in the second storage space.

[0007] Furthermore, the hydrogen supply system also includes: a brake gas cylinder, which is connected to the compressor through a third ventilation pipeline, and has a third storage space in the brake gas cylinder, so that the compressor can inject gas into the third storage space through the third ventilation pipeline, and a second pressure sensor is arranged on the third ventilation pipeline for detecting the pressure value of the gas in the third storage space.

[0008] Furthermore, the hydrogen supply system further includes: a first control valve, which is arranged at the connection between the second ventilation pipeline and the third ventilation pipeline, so that the compressor is connected to the second ventilation pipeline or the third ventilation pipeline by adjusting the first control valve.

[0009] Furthermore, the hydrogen supply system also includes: a fourth ventilation line, which is connected to the second ventilation line and arranged close to the first pressure sensor, and a second control valve is arranged on the fourth ventilation line to connect the fourth ventilation line with the second ventilation line by adjusting the second control valve, so that the gas in the second containing space is discharged through the second ventilation line and the fourth ventilation line in sequence.

[0010] Furthermore, the hydrogen supply system also includes: a filter component connected to the compressor to filter the air entering the compressor, and the compressor is connected to the engine through a gear transmission to drive the compressor through the engine to provide gas to the second accommodation space.

[0011] Furthermore, the hydrogen supply system also includes: a third pressure sensor, which is arranged on the first ventilation line close to the first storage space, so as to detect the pressure value of the hydrogen in the first storage space; a third control valve, which is arranged on the first ventilation line and is located on the side of the third pressure sensor away from the first storage space, so as to open or disconnect the second ventilation line by adjusting the third control valve.

[0012] Furthermore, the hydrogen supply system also includes: a pressure reducing valve, which is arranged on the first ventilation pipeline and located on the side of the third control valve away from the third pressure sensor, so as to reduce the pressure of the hydrogen flowing out of the first storage space; a pressure regulating valve, which is arranged on the first ventilation pipeline and located on the side of the pressure reducing valve away from the third control valve, so as to regulate the pressure of the hydrogen after the pressure reduction is completed; and a fourth pressure sensor, which is arranged on the first ventilation pipeline and located on the side of the pressure regulating valve away from the pressure regulating valve, so as to detect the pressure value of the hydrogen after the pressure regulation is completed.

[0013] Furthermore, the hydrogen supply system also includes: an airbag, which is expandably arranged in the hydrogen storage tank, forming a second accommodating space in the airbag, and the airbag is connected to the second ventilation pipeline; or, a partition, which is slidably arranged in the hydrogen storage tank, so that a first accommodating space and a second accommodating space are formed on both sides of the partition in the hydrogen storage tank.

[0014] According to another aspect of the present invention, a hydrogen internal combustion engine is provided, which is suitable for the above-mentioned hydrogen supply system.

[0015] By applying the technical solution of the utility model, a hydrogen supply system includes a hydrogen storage tank, which is connected to the air intake of the engine through a first ventilation pipeline. The hydrogen storage tank has a first storage space and a second storage space, respectively. The first storage space is used to store hydrogen. The first storage space is connected to the first ventilation pipeline, and the second storage space is connected to the second ventilation pipeline. The volumes of the first storage space and the second storage space can be adjusted, so that gas can be added to the second storage space through the second ventilation pipeline to increase the volume of the second storage space, so that the volume of the first storage space can be reduced, thereby increasing the pressure of the hydrogen in the first storage space. With the above arrangement, when the hydrogen pressure in the hydrogen storage tank is lower than a fixed threshold and cannot be fully utilized by the engine, the hydrogen storage tank stops supplying hydrogen. At this time, there is still a small amount of hydrogen in the hydrogen storage tank, and gas is injected into the second storage space in the hydrogen storage tank through the second ventilation pipeline. As the volume of the second storage space gradually increases, the volume of the first storage space gradually decreases, so that the pressure of the hydrogen in the first storage space increases, and the hydrogen with increased pressure flows into the engine through the first ventilation pipeline to ensure the normal operation of the engine, thereby fully utilizing the small amount of hydrogen in the hydrogen storage tank to solve the problem in the prior art that the residual hydrogen in the hydrogen supply system cannot be utilized by the hydrogen internal combustion engine, resulting in low comprehensive thermal efficiency of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of a process provided by a first embodiment of a hydrogen supply system according to the utility model is shown;

[0018] Figure 2 A schematic diagram of the process provided by the second embodiment of the hydrogen supply system according to the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Hydrogen storage tank; 11. First accommodating space; 12. Second accommodating space; 13. Airbag; 14. Partition; 20. First ventilation line; 21. Third pressure sensor; 22. Third control valve; 23. Pressure reducing valve; 24. Pressure regulating valve; 25. Fourth pressure sensor; 30. Engine; 40. Second ventilation line; 41. First pressure sensor; 50. Compressor; 60. Brake cylinder; 61. Third accommodating space; 70. Third ventilation line; 71. Second pressure sensor; 80. First control valve; 90. Fourth ventilation line; 91. Second control valve; 100. Filter component. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to solve the problem in the prior art that the residual hydrogen in the hydrogen supply system cannot be utilized by the hydrogen internal combustion engine, resulting in low overall thermal efficiency of the entire vehicle, the present application provides a hydrogen supply system and a hydrogen internal combustion engine.

[0023] Embodiment 1

[0024] Please refer to Figure 1 and Figure 2 As shown, an aspect of the technical solution of the utility model is applied, and a hydrogen supply system is provided. The hydrogen supply system includes a hydrogen storage tank 10, and the hydrogen storage tank 10 is connected to the air inlet of the engine 30 through a first ventilation line 20. The hydrogen storage tank 10 has a first accommodating space 11 and a second accommodating space 12 respectively. The first accommodating space 11 is used to store hydrogen. The first accommodating space 11 is connected to the first ventilation line 20, and the second accommodating space 12 is connected to the second ventilation line 40. The volumes of the first accommodating space 11 and the second accommodating space 12 can be adjusted, so that gas can be added to the second accommodating space 12 through the second ventilation line 40 to increase the volume of the second accommodating space 12, so that the volume of the first accommodating space 11 is reduced, and then the pressure of the hydrogen in the first accommodating space 11 can be increased.

[0025] By applying the technical solution of this embodiment, when the hydrogen pressure in the hydrogen storage tank 10 is lower than the fixed threshold and cannot be fully utilized by the engine 30, the hydrogen storage tank 10 stops supplying hydrogen. At this time, there is still a small amount of hydrogen in the hydrogen storage tank 10. Gas is injected into the second storage space 12 in the hydrogen storage tank 10 through the second ventilation pipeline 40. As the volume of the second storage space 12 gradually increases, the volume of the first storage space 11 gradually decreases, so that the pressure of the hydrogen in the first storage space 11 increases, and the pressure is increased through the first ventilation pipeline 20. The expanded hydrogen flows into the engine 30 to ensure the normal operation of the engine 30; and when it is necessary to add hydrogen to the first storage space 11 in the hydrogen storage tank 10, the second storage space 12 needs to be vented to reduce the pressure and volume in the second storage space 12, and then hydrogen is injected into the first storage space 11. Therefore, the above embodiment makes full use of the small amount of hydrogen in the hydrogen storage tank 10 to solve the problem that the residual hydrogen in the hydrogen supply system in the prior art cannot be used by the hydrogen internal combustion engine, resulting in a low overall thermal efficiency of the whole vehicle.

[0026] Specifically, the hydrogen supply system further includes a compressor 50 and a first pressure sensor 41; wherein the compressor 50 is connected to the second ventilation pipeline 40, and is used to provide gas to the second storage space 12; the first pressure sensor 41 is arranged on the second ventilation pipeline 40 at a position close to the second storage space 12, and the first pressure sensor 41 is used to detect the pressure value in the second storage space 12. The above arrangement is to add air to the second storage space 12 through the second ventilation pipeline 40 through the compressor 50 to increase the volume of the second storage space 12 when it is necessary to pressurize the hydrogen in the first storage space 11, thereby increasing the pressure of the hydrogen in the first storage space 11, and at the same time, the first pressure sensor 41 can detect the pressure value of the air in the second storage space 12 in real time.

[0027] In order to achieve braking of the engine 30, the hydrogen supply system further includes a brake cylinder 60, which is connected to the compressor 50 through a third ventilation pipeline 70, and has a third accommodation space 61 in the brake cylinder 60, so that the compressor 50 can inject gas into the third accommodation space 61 through the third ventilation pipeline 70, and a second pressure sensor 71 is provided on the third ventilation pipeline 70 to detect the pressure value of the gas in the third accommodation space 61. In the above configuration, since the braking demand of the engine 30 has the highest priority, it is first determined whether the gas pressure value P1 in the third accommodation space 61 of the brake cylinder 60 meets the requirement of the preset pressure threshold value F1 required for braking of the engine 30, and then it is determined whether it is necessary to fill the third accommodation space 61 in the brake cylinder 60 through the third ventilation pipeline 70 by the compressor 50, so that the pressure of the gas in the third accommodation space 61 is increased to meet the pressure requirement of the engine 30.

[0028] In this embodiment, the first control valve 80 is a bypass valve.

[0029] Specifically, the hydrogen supply system also includes a first control valve 80, which is arranged at the connection between the second ventilation line 40 and the third ventilation line 70, so as to make the compressor 50 communicate with the second ventilation line 40 or the third ventilation line 70 by adjusting the first control valve 80. The above-mentioned setting is to judge whether the driver has a braking action when the gas pressure value P1 in the third storage space 61 of the brake cylinder 60 is greater than the preset pressure threshold value F1 to meet the pressure demand of the engine 30. When the driver has a braking action demand, it is not necessary to care about the pressure state of the gas in the second storage space 12 in the hydrogen storage tank 10. By controlling the first control valve 80, the compressor 50 is connected with the third ventilation line 70, and then the compressor 50 is inflated into the third storage space 61 of the brake cylinder 60 to increase the gas pressure in the third storage space 61; and when the driver has no braking action demand, it is necessary to further judge whether the gas pressure in the third storage space 61 in the hydrogen storage tank 10 is greater than the preset pressure threshold value F1 to meet the pressure demand of the engine 30. The relationship between the hydrogen pressure value P2 in the first accommodating space 11 and the preset pressure threshold value F2 is that when the hydrogen pressure value P2 is greater than the preset pressure threshold value F2, at this time, the pressure of the hydrogen in the hydrogen storage tank 10 is sufficient, and the compressor 50 does not need to inflate the second accommodating space 12; when the hydrogen pressure value P2 is less than the preset pressure threshold value F2 and greater than the preset pressure threshold value F3, at this time, the pressure of the hydrogen in the hydrogen storage tank 10 is in a low pressure state, and the compressor 50 is connected to the second ventilation line 40 by controlling the first control valve 80, thereby increasing the volume of the second accommodating space 12 and increasing the hydrogen pressure value P2 in the first accommodating space 11 to ensure the normal driving of the engine 30.

[0030] In this embodiment, if gas is added to the second storage space 12 through the compressor 50 and the hydrogen pressure value P2 in the first storage space 11 increases, at this time, the instrument panel alarm indicates that the hydrogen storage tank 10 is in an underpressure state, then it is necessary to detect the pressure value P3 of the gas in the second storage space 12 through the first pressure sensor 41 and determine the pressure difference between the pressure value P3 and the pressure value P2. When the pressure difference between the pressure value P3 and the pressure value P2 is less than the preset pressure threshold value F4, at this time, the volume of the second storage space 12 in the hydrogen storage tank 10 has not increased to the maximum state, and the compressor 50 is connected to the second ventilation pipeline 40 to continue to add gas to the second storage space 12; and when the pressure difference between the pressure value P3 and the pressure value P2 is greater than the preset pressure threshold value F4, at this time, it is proved that the volume of the second storage space 12 has increased to the maximum state, and the compressor 50 stops adding gas to the second storage space 12.

[0031] Specifically, the hydrogen supply system further includes a fourth ventilation line 90, which is connected to the second ventilation line 40 and arranged near the first pressure sensor 41. A second control valve 91 is arranged on the fourth ventilation line 90, so that the fourth ventilation line 90 is connected to the second ventilation line 40 by adjusting the second control valve 91, so that the gas in the second accommodation space 12 is discharged sequentially through the second ventilation line 40 and the fourth ventilation line 90. In the above arrangement, the second control valve 91 is used to control the fourth ventilation line 90 to be turned on or off, so that when it is necessary to add hydrogen to the first accommodation space 11 of the hydrogen storage tank 10, at this time, the second control valve 91 controls the fourth ventilation line 90 to be turned on, so that the gas in the second accommodation space 12 flows out through the second ventilation line 40 and the fourth ventilation line 90, so that the volume and pressure of the second accommodation space 12 are reduced.

[0032] Specifically, the hydrogen supply system further includes a filter component 100, which is connected to the compressor 50 to filter the air entering the compressor 50, and the compressor 50 is connected to the engine 30 by gear transmission, so that the engine 30 drives the compressor 50 to provide gas to the second accommodation space 12. The above arrangement uses the compressor 50 originally provided on the engine 30 and connected to it by gear transmission to add gas to the second accommodation space 12 or the third accommodation space 61.

[0033] like Figure 1 As shown, the hydrogen supply system also includes a third pressure sensor 21 and a third control valve 22; wherein the third pressure sensor 21 is arranged on the first ventilation pipeline 20 near the first accommodation space 11, so as to detect the pressure value of the hydrogen in the first accommodation space 11; the third control valve 22 is arranged on the first ventilation pipeline 20 and is located on the side of the third pressure sensor 21 away from the first accommodation space 11, so as to open or disconnect the second ventilation pipeline 40 by adjusting the third control valve 22. The above arrangement detects the pressure value P2 after the supercharging in the first accommodation space 11 through the third pressure sensor 21, and then opens the first ventilation pipeline 20 by adjusting the third control valve 22, so that the supercharged hydrogen in the first accommodation space 11 flows into the engine 30 through the first ventilation pipeline 20, so as to ensure the normal operation of the engine 30, thereby solving the problem that the small amount of hydrogen remaining in the hydrogen storage tank 10 cannot be fully utilized in the prior art, resulting in low thermal efficiency of the engine 30.

[0034] Specifically, the hydrogen supply system also includes a pressure reducing valve 23, a pressure regulating valve 24 and a fourth pressure sensor 25; wherein the pressure reducing valve 23 is arranged on the first ventilation line 20 and is located on the side of the third control valve 22 away from the third pressure sensor 21, so as to reduce the pressure of the hydrogen flowing out of the first accommodating space 11; the pressure regulating valve 24 is arranged on the first ventilation line 20 and is located on the side of the pressure reducing valve 23 away from the third control valve 22, so as to adjust the pressure of the hydrogen after the pressure reduction is completed; the fourth pressure sensor 25 is arranged on the first ventilation line 20 and is located on the side of the pressure regulating valve 24 away from the pressure regulating valve 24, so as to detect the pressure value of the hydrogen after the pressure regulation is completed. In the above arrangement, the pressurized hydrogen in the first accommodating space 11 controls the first ventilation line 20 to be opened through the third control valve 22, and then flows through the pressure reducing valve 23 and the pressure regulating valve 24 in sequence to respectively reduce the pressure and regulate the pressure of the pressurized hydrogen, and then the pressure value of the hydrogen after the pressure regulation is detected by the fourth pressure sensor 25, and flows into the engine 30 to enable the engine 30 to operate normally.

[0035] like Figure 1 As shown, the hydrogen supply system further includes an airbag 13, which is expandably arranged in the hydrogen storage tank 10, and a second accommodation space 12 is formed in the airbag 13, and the airbag 13 is connected to the second ventilation pipeline 40. In the above arrangement, the first ventilation pipeline 20 is connected to the hydrogen storage tank 10, and the second ventilation pipeline 40 is connected to the airbag 13 in the hydrogen storage tank 10, and the airbag 13 is the second accommodation space 12, and the space in the hydrogen storage tank 10 except the airbag 13 is the first accommodation space 11.

[0036] In this embodiment, the preset pressure threshold F1 is 30 pounds, the preset pressure threshold F2 is 20 pounds, the preset pressure threshold F3 is 15 pounds, and the preset pressure threshold F4 is 2000KPa; wherein the value of the preset threshold F4 is affected by the elasticity of the airbag 13 and the size of the hydrogen storage tank 10.

[0037] It should be noted that, in this embodiment, the values ​​of the preset pressure thresholds F1, F2, F3, and F4 are not limited thereto, and can be selected accordingly according to usage requirements and actual working conditions.

[0038] In this embodiment, the specific control process of the hydrogen supply system is as follows:

[0039] S1: Since the braking demand of the engine 30 has the highest priority, first determine whether the pressure value P1 of the gas in the brake cylinder 60 meets the requirement of the preset pressure threshold F1 required for the braking of the engine 30, that is, whether the pressure value P1 is greater than the preset pressure threshold F1; when the pressure value P1 is less than the preset pressure threshold F1, the compressor 50 should be controlled to inflate the brake cylinder 60; when the pressure value P1 is greater than or equal to the preset pressure threshold F1, at this time, it is necessary to determine whether the driver has a braking action demand.

[0040] S2: When the driver has a braking demand, the compressor 50 should inflate the brake cylinder 60 regardless of the pressure state in the hydrogen storage tank 10; and when the driver has no braking demand, it is necessary to further determine the relationship between the hydrogen pressure value P2 in the first accommodating space 11 in the hydrogen storage tank 10 and the preset pressure threshold F2 and the preset pressure threshold F3.

[0041] S3: When the hydrogen pressure value P2 in the first accommodating space 11 is greater than or equal to the preset pressure threshold F2, at this time, the pressure of the hydrogen in the hydrogen storage tank 10 is sufficient, and there is no need to inflate the second accommodating space 12.

[0042] S4: When the hydrogen pressure value P2 in the first storage space 11 is less than the preset pressure threshold F2 and greater than or equal to the preset pressure threshold F3, at this time, the pressure of the hydrogen in the hydrogen storage tank 10 is in a low pressure state, and it is necessary to inflate the second storage space 12 to increase the hydrogen pressure value P2 in the first storage space 11.

[0043] S5: When the hydrogen pressure value P2 in the first containing space 11 is less than the preset pressure threshold value F3, the hydrogen storage tank 10 is in an underpressure state. At this time, the speed and torque of the engine 30 need to be limited, and an alarm is given on the dashboard of the cab, and then the engine 30 runs slowly until it is shut down.

[0044] S6: When controlling the compressor 50 to add gas into the second storage space 12, if the instrument panel alarm indicates that there is underpressure in the hydrogen storage tank 10, it is necessary to determine the relationship between the pressure difference between the pressure value P3 of the gas in the second storage space 12 and the pressure value P2 of the hydrogen in the first storage space 11 and the preset pressure threshold F4.

[0045] S7: When the pressure difference between the pressure value P3 and the pressure value P2 is less than the preset pressure threshold F4, the volume of the second storage space 12 in the hydrogen storage tank 10 has not increased to the maximum state. At this time, the compressor 50 needs to continue to inflate the second storage space 12; when the pressure difference between the pressure value P3 and the pressure value P2 is greater than or equal to the preset pressure threshold F4, the volume of the second storage space 12 in the hydrogen storage tank 10 has increased to the maximum state. At this time, the compressor 50 is controlled to stop inflating the second storage space 12.

[0046] Embodiment 2

[0047] The difference between the hydrogen supply system in the second embodiment and that in the first embodiment is that the structures of the first accommodating space 11 and the second accommodating space 12 provided in the hydrogen storage tank 10 are different.

[0048] like Figure 2As shown, the hydrogen supply system further includes a partition 14, which is slidably disposed in the hydrogen storage tank 10, so that a first accommodation space 11 and a second accommodation space 12 are formed on both sides of the partition 14 in the hydrogen storage tank 10. In the above arrangement, the first ventilation pipeline 20 and the second ventilation pipeline 40 are respectively connected to the hydrogen storage tank 10, and are respectively located on both sides of the partition 14, so that when gas is added to the second accommodation space 12 located on one side of the partition 14 in the hydrogen storage tank 10 through the second ventilation pipeline 40 by the compressor 50, as more and more gas is added, the partition 14 slides in the hydrogen storage tank 10 in a direction away from the second accommodation space 12, so that the volume of the first accommodation space 11 is reduced, and then the pressure of the hydrogen in the first accommodation space 11 is increased, and then the hydrogen after supercharging is transported to the engine 30 by the first ventilation pipeline 20 to ensure the normal operation of the engine 30.

[0049] According to another aspect of the technical solution of the utility model, a hydrogen internal combustion engine is provided, which is suitable for the above-mentioned hydrogen supply system.

[0050] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0051] The hydrogen supply system includes a hydrogen storage tank, which is connected to the air intake of the engine through a first ventilation pipeline. The hydrogen storage tank has a first storage space and a second storage space, respectively. The first storage space is used to store hydrogen. The first storage space is connected to the first ventilation pipeline, and the second storage space is connected to the second ventilation pipeline. The volumes of the first storage space and the second storage space can be adjusted to increase the volume of the second storage space by adding gas to the second storage space through the second ventilation pipeline, so that the volume of the first storage space is reduced, thereby increasing the pressure of the hydrogen in the first storage space. With the above arrangement, when the hydrogen pressure in the hydrogen storage tank is lower than a fixed threshold and cannot be fully utilized by the engine, the hydrogen storage tank stops supplying hydrogen. At this time, there is still a small amount of hydrogen in the hydrogen storage tank, and gas is injected into the second storage space in the hydrogen storage tank through the second ventilation pipeline. As the volume of the second storage space gradually increases, the volume of the first storage space gradually decreases, so that the pressure of the hydrogen in the first storage space increases, and the hydrogen with increased pressure flows into the engine through the first ventilation pipeline to ensure the normal operation of the engine, thereby fully utilizing the small amount of hydrogen in the hydrogen storage tank to solve the problem in the prior art that the residual hydrogen in the hydrogen supply system cannot be utilized by the hydrogen internal combustion engine, resulting in low comprehensive thermal efficiency of the whole vehicle.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0054] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydrogen supply system, characterized in that: include: A hydrogen storage tank (10), the hydrogen storage tank (10) being connected to an air inlet of an engine (30) via a first ventilation pipeline (20), the hydrogen storage tank (10) having a first accommodating space (11) and a second accommodating space (12) therein, the first accommodating space (11) being used to store hydrogen, the first accommodating space (11) being in communication with the first ventilation pipeline (20), the second accommodating space (12) being in communication with the second ventilation pipeline (40), the volumes of the first accommodating space (11) and the second accommodating space (12) being adjustable, so that gas can be added into the second accommodating space (12) via the second ventilation pipeline (40) to increase the volume of the second accommodating space (12), thereby reducing the volume of the first accommodating space (11), and thereby increasing the pressure of the hydrogen in the first accommodating space (11).

2. The hydrogen supply system according to claim 1, characterized in that: The hydrogen supply system further comprises: a compressor (50), connected to the second ventilation pipeline (40), and used to provide gas to the second containing space (12); A first pressure sensor (41) is arranged on the second ventilation pipeline (40) at a position close to the second accommodation space (12), and the first pressure sensor (41) is used to detect the pressure value in the second accommodation space (12).

3. The hydrogen supply system according to claim 2, characterized in that: The hydrogen supply system further comprises: The brake gas cylinder (60) is connected to the compressor (50) via a third ventilation pipeline (70). The brake gas cylinder (60) has a third storage space (61) therein, so that the compressor (50) can inject gas into the third storage space (61) via the third ventilation pipeline (70). The third ventilation pipeline (70) is provided with a second pressure sensor (71) for detecting the pressure value of the gas in the third storage space (61).

4. The hydrogen supply system according to claim 3, characterized in that: The hydrogen supply system further comprises: A first control valve (80) is arranged at the connection between the second ventilation pipeline (40) and the third ventilation pipeline (70) so as to enable the compressor (50) to communicate with the second ventilation pipeline (40) or the third ventilation pipeline (70) by adjusting the first control valve (80).

5. The hydrogen supply system according to claim 2, characterized in that: The hydrogen supply system further comprises: A fourth ventilation pipeline (90) is connected to the second ventilation pipeline (40) and is arranged close to the first pressure sensor (41). A second control valve (91) is arranged on the fourth ventilation pipeline (90) so that the fourth ventilation pipeline (90) is connected to the second ventilation pipeline (40) by adjusting the second control valve (91), so that the gas in the second accommodating space (12) is discharged through the second ventilation pipeline (40) and the fourth ventilation pipeline (90) in sequence.

6. The hydrogen supply system according to claim 2, characterized in that: The hydrogen supply system further comprises: The filter component (100) is connected to the compressor (50) for filtering the air entering the compressor (50), and the compressor (50) is connected to the engine (30) by gear transmission so that the engine (30) drives the compressor (50) to provide gas to the second accommodation space (12).

7. The hydrogen supply system according to claim 1, characterized in that: The hydrogen supply system also includes: a third pressure sensor (21), arranged on the first ventilation pipeline (20) near the first containing space (11), and used for detecting the pressure value of the hydrogen in the first containing space (11); A third control valve (22) is arranged on the first ventilation pipeline (20) and is located on a side of the third pressure sensor (21) away from the first accommodating space (11), so as to open or close the second ventilation pipeline (40) by adjusting the third control valve (22).

8. The hydrogen supply system according to claim 7, characterized in that: The hydrogen supply system also includes: a pressure reducing valve (23), arranged on the first ventilation pipeline (20) and located on a side of the third control valve (22) away from the third pressure sensor (21), for reducing the pressure of hydrogen flowing out of the first containing space (11); a pressure regulating valve (24), arranged on the first ventilation pipeline (20) and located on a side of the pressure reducing valve (23) away from the third control valve (22), for regulating the pressure of the hydrogen after the pressure reduction is completed; A fourth pressure sensor (25) is arranged on the first ventilation pipeline (20) and is located on a side of the pressure regulating valve (24) away from the pressure regulating valve (24), so as to detect the pressure value of the hydrogen after the pressure regulation is completed.

9. The hydrogen supply system according to claim 1, characterized in that: The hydrogen supply system also includes: an airbag (13) which is expandably arranged in the hydrogen storage tank (10), the second accommodation space (12) being formed in the airbag (13), and the airbag (13) being connected to the second ventilation pipeline (40); or, A partition (14) is slidably disposed in the hydrogen storage tank (10) so that the first accommodating space (11) and the second accommodating space (12) are formed on both sides of the partition (14) in the hydrogen storage tank (10).

10. A hydrogen internal combustion engine, characterized in that: The hydrogen internal combustion engine is applicable to the hydrogen supply system according to any one of claims 1 to 9.

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