Simulation test system and method for hydrogen fuel cell engine

Abstract

The invention discloses a simulation test system and method for a hydrogen fuel cell engine, and relates to the technical field of fuel cell test systems. A cabin assembly of the system comprises an environmental cabin body, an air inlet assembly comprises a hydrogen tank, an exhaust assembly comprises an air exhaust buffer tank and a hydrogen exhaust buffer tank, the environmental cabin body is used for placing a hydrogen fuel cell engine, an air suction port of the hydrogen fuel cell engine is communicated with the environmental cabin body, and a hydrogen suction port is communicated with the hydrogen tank. The air exhaust port and the hydrogen exhaust port are respectively communicated with the air exhaust buffer tank and the hydrogen exhaust buffer tank; the system further comprises a vacuum assembly, and the vacuum assembly is used for enabling the environment chamber body, the air exhaust buffer tank and the hydrogen exhaust buffer tank to keep preset pressure. At the starting moment of the hydrogen fuel cell engine, the system can improve the pressure consistency of the environmental chamber, the air exhaust buffer tank and the hydrogen exhaust buffer tank; meanwhile, the system structure is simplified and the system cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell test systems, and in particular to an analog test system and method for a hydrogen fuel cell engine. Background Art

[0002] With the improvement of environmental awareness and requirements, more and more mobile devices begin to use hydrogen fuel cells as power sources. The outside atmosphere is related to the working efficiency of hydrogen fuel cells. Under different outside atmospheric conditions, the working efficiency of hydrogen fuel cells is different. Therefore, it is necessary to test hydrogen fuel cells in different atmospheric pressure environments and different temperature environments. To simulate the working efficiency of hydrogen fuel cells in a plateau environment, there are two methods in related technologies: the intake and exhaust plateau simulation method and the whole-cabin plateau simulation method.

[0003] Intake and exhaust plateau simulation method: Only the intake and exhaust ports are simulated to be in a plateau environment, while the remaining peripheral components are kept in an atmospheric pressure environment. The advantage of this method is that it can partially simulate the influence of the plateau environment on the engine, especially in terms of intake and exhaust performance. However, since the peripheral components are still in an atmospheric pressure environment, it may not be able to fully reflect the performance changes of the entire system under the plateau environment.

[0004] Whole-cabin plateau simulation method: The entire fuel cell engine is completely placed in a low-pressure environment chamber to simulate the plateau environment. This means that all components of the engine, including intake, exhaust, and peripheral equipment, work in a low-pressure environment. This method can more comprehensively evaluate the overall performance of the fuel cell engine in a plateau environment, including aspects such as aerodynamic performance, thermal management, and system control. Since all components work in the same environment, the test results are closer to the actual plateau usage conditions.

[0005] Compared with the intake and exhaust plateau simulation method, the whole-cabin plateau simulation method has significant advantages in terms of comprehensiveness, accuracy, and reliability, and is a necessary means to evaluate the plateau adaptability of fuel cell systems. In the whole-cabin plateau simulation system in related technologies, the entire fuel cell engine is placed in an environment chamber, and an intake buffer tank and an exhaust buffer tank are also arranged around the environment chamber. The intake buffer tank includes a hydrogen tank and an air intake buffer tank, which are respectively used to store hydrogen and air and are used to communicate with the hydrogen intake port and the air intake port of the fuel cell engine; the exhaust buffer tank is used to communicate with the exhaust port of the fuel cell engine.

[0006] However, the inventor found that in the whole-cabin plateau simulation system with this structure, since the volume of the air intake buffer tank is much smaller than the volume of the environment chamber (usually the volume of the intake buffer tank is only 1% of the volume of the environment chamber), at the moment when the hydrogen fuel cell engine starts, the intake and exhaust volumes change greatly, resulting in large pressure fluctuations in the intake buffer tank, which affects the reliability of the test results.

[0007] Therefore, it is a technical problem urgently to be solved by those skilled in the art to provide a hydrogen fuel cell engine simulation test system that can improve the reliability of test results. Summary of the Invention

[0008] The present invention discloses a simulation test system and method for a hydrogen fuel cell engine to solve the technical problem that in the simulation test system of a hydrogen fuel cell engine in the related art, the pressure fluctuation of the intake air buffer tank is relatively large at the moment when the hydrogen fuel cell engine starts, affecting the reliability of test results.

[0009] To solve the above problems, the present invention adopts the following technical solutions: The first aspect of the present invention provides a simulation test system for a hydrogen fuel cell engine.

[0010] The simulation test system for a hydrogen fuel cell engine of the present invention includes a cabin assembly, an intake assembly, and an exhaust assembly. Among them, the cabin assembly includes an environmental cabin body, the intake assembly includes a hydrogen gas tank, the exhaust assembly includes an air exhaust buffer tank and a hydrogen exhaust buffer tank. The environmental cabin body is used to place the hydrogen fuel cell engine. The air intake port of the hydrogen fuel cell engine is communicated with the environmental cabin body, the hydrogen intake port of the hydrogen fuel cell engine is communicated with the hydrogen gas tank, and the air exhaust port and the hydrogen exhaust port of the hydrogen fuel cell engine are respectively communicated with the air exhaust buffer tank and the hydrogen exhaust buffer tank. The simulation test system further includes a vacuum assembly, and the vacuum assembly is used to be communicated with the environmental cabin body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank, and keep the environmental cabin body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank at a preset pressure.

[0011] According to an optional embodiment, the vacuum assembly includes an intake vacuum assembly and an exhaust vacuum assembly. Among them, the intake vacuum assembly is communicated with the environmental cabin body, the exhaust vacuum assembly is communicated with the air exhaust buffer tank and the hydrogen exhaust buffer tank, and the intake vacuum assembly and the exhaust vacuum assembly are independently adjusted from each other.

[0012] According to an optional embodiment, the intake vacuum assembly includes a first vacuum assembly, and the first vacuum assembly is used to be communicated with the environmental cabin body. The exhaust vacuum assembly includes a second vacuum assembly and a third vacuum assembly. Among them, the second vacuum assembly is used to be communicated with the air exhaust buffer tank, the third vacuum assembly is used to be communicated with the hydrogen exhaust buffer tank, and the first vacuum assembly, the second vacuum assembly, and the third vacuum assembly are all independently adjusted from each other.

[0013] According to an optional embodiment, the first vacuum assembly, the second vacuum assembly, and the third vacuum assembly each include at least one vacuum pump and a vacuum pipeline. The vacuum pipeline is used to connect the vacuum pump to one of the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank. A first pressure regulating valve is further provided on the vacuum pipeline. A second pressure regulating valve is further provided between the first pressure regulating valve and the vacuum pump. Both ends of the second pressure regulating valve are connected to the atmosphere and the vacuum pipeline respectively.

[0014] According to an optional embodiment, the exhaust assembly further includes a water storage tank. The water storage tank is connected to the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank. Drain valves are further provided between the water storage tank and the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank. The drain valves are used to control the water in the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank to flow into the water storage tank for storage. A liquid level detector is further provided in the water storage tank. The liquid level detector is used to detect the water level in the water storage tank. According to an optional embodiment, the water storage tank is further provided with an air inlet pipe. A water tank air supply valve is provided on the air inlet pipe. A one-way throttle valve is further provided between the water tank air supply valve and the water storage tank. The one-way throttle valve is arranged such that gas enters the water storage tank from the outside.

[0015] According to an optional embodiment, the intake assembly further includes an adjustable intake buffer tank. The inlet of the adjustable intake buffer tank is connected to an air source, a water source, a nitrogen source, and an oxygen source, and enables the gas in the adjustable intake buffer tank to form various oxygen concentrations and / or various humidities. A three-way valve is provided at the air intake of the hydrogen fuel cell engine. The three interfaces of the three-way valve are respectively connected to the environmental chamber body, the air intake of the hydrogen fuel cell engine, and the adjustable intake buffer tank.

[0016] The second aspect of the present invention provides a simulation test method for a hydrogen fuel cell engine.

[0017] The simulation test method for a hydrogen fuel cell engine according to the present invention is implemented based on the simulation test system for a hydrogen fuel cell engine described in any one of the technical solutions of the present invention. The simulation test method at least includes the following steps: Deliver air from the air in the environmental chamber body to the air intake of the hydrogen fuel cell engine, and deliver hydrogen from the hydrogen in the hydrogen tank to the hydrogen intake of the hydrogen fuel cell engine; Discharge the air exhaust gas of the hydrogen fuel cell engine into the air exhaust buffer tank, and discharge the hydrogen exhaust gas of the hydrogen fuel cell engine into the hydrogen exhaust buffer tank; Obtain the pressure data of the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank, adjust at least one of the multiple vacuum pumps based on the obtained pressure data, and keep the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank at a preset pressure.

[0018] According to an optional embodiment, adjust the first vacuum assembly based on the obtained pressure data inside the environmental chamber body; adjust the second vacuum assembly based on the obtained pressure data inside the air exhaust buffer tank; adjust the third vacuum assembly based on the obtained pressure data inside the hydrogen exhaust buffer tank.

[0019] According to an optional embodiment, the simulation test method for a hydrogen fuel cell engine further includes the following steps: adjust the oxygen concentration and / or humidity of the gas inside the adjustable intake buffer tank, and switch the air intake port of the hydrogen fuel cell engine from being connected to the environmental chamber body to being connected to the adjustable intake buffer tank.

[0020] The technical solution adopted by the present invention can achieve the following beneficial effects: For the simulation test system for a hydrogen fuel cell engine of the present invention, the air intake port of the hydrogen fuel cell engine is connected to the environmental chamber body, that is, the air intake port of the hydrogen fuel cell engine sucks the air inside the environmental chamber body. The volume of the environmental chamber body is much larger than that of the air intake buffer tank, and the buffering effect of the environmental chamber body is better than that of the air intake buffer tank. It is difficult for the air sucked by the air intake port of the hydrogen fuel cell engine to cause a pressure change inside the environmental chamber body. Compared with the existing simulation test system, for the simulation test system for a hydrogen fuel cell engine of the present invention, at the moment when the hydrogen fuel cell engine starts, it will not cause an obvious change in the pressure of the environmental chamber body, and can improve the pressure consistency of the environmental chamber body, the air exhaust buffer tank, and the hydrogen exhaust buffer tank, thereby being beneficial to improving the reliability of the test results.

[0021] On the other hand, for the simulation test system for a hydrogen fuel cell engine of the present invention, the air intake port of the hydrogen fuel cell engine is connected to the environmental chamber body, so the air intake buffer tank can be cancelled, and correspondingly, a set of pressure sensors and temperature sensors can also be set less, which is beneficial to simplifying the structure of the simulation test system for a hydrogen fuel cell engine of the invention, and at the same time can reduce the cost of the simulation test system. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is a schematic diagram of the simulation test system for a hydrogen fuel cell engine according to an embodiment of the present application; Figure 2 is Figure 1 a schematic diagram of module A in Figure 3 is Figure 1 a schematic diagram of module B in Figure 4 is Figure 1 a schematic diagram of module C in Figure 5 is Figure 1 a schematic diagram of module D in Figure 6 is a schematic diagram of the intake and exhaust interfaces of the hydrogen fuel cell engine according to an embodiment of the present application; Figure 7 is a flowchart of the simulation test method for a hydrogen fuel cell engine according to an embodiment of the present application.

[0024] In the figure: 110 is the environmental chamber body; 111 is the fresh air component; 112 is the hydrogen concentration sensor; 113 is the first pressure sensor; 114 is the exhaust valve; 210 is the hydrogen tank; 220 is the adjustable intake buffer tank; 310 is the air exhaust buffer tank; 311 is the second pressure sensor; 312 is the air pressure regulating valve; 320 is the hydrogen exhaust buffer tank; 321 is the third pressure sensor; 322 is the hydrogen pressure regulating valve; 330 is the water storage tank; 340 is the drain valve; 350 is the liquid level detector; 360 is the water tank air supply valve; 370 is the one-way throttle valve; 380 is the water storage tank drain valve; 400 is the hydrogen fuel cell engine; 410 is the air intake port; 411 is the three-way valve; 420 is the hydrogen intake port; 430 is the air exhaust port; 440 is the hydrogen exhaust port; 511 is the first vacuum pump; 512 is the first vacuum pipeline; 513 is the first water tank; 521 is the second vacuum pump; 522 is the second vacuum pipeline; 523 is the second water tank; 531 is the third vacuum pump; 532 is the third vacuum pipeline; 533 is the third water tank; 540 is the first pressure regulating valve; 550 is the second pressure regulating valve; 610 is the nitrogen generating device; 620 is the oxygen generating device. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0026] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0027] In the integral cabin type high altitude simulation system in the related art, the air intake of the hydrogen fuel cell engine sucks the gas in the air intake buffer tank. At the moment when the hydrogen fuel cell engine starts, the intake air volume changes greatly, and the pressure fluctuation in the air intake buffer tank is large, resulting in a large difference in pressure between the air intake buffer tank and the pressure in the environmental chamber, the air exhaust buffer tank, and the hydrogen exhaust buffer tank, thus leading to low reliability of the test results. In this application, by canceling the air intake buffer tank and allowing the air intake of the fuel cell engine to suck the gas in the environmental chamber, it is beneficial to improve the pressure consistency in the environmental chamber, the air exhaust buffer tank, and the hydrogen exhaust buffer tank, thereby improving the reliability of the test results.

[0028] The following combines the attached Figures 1 to 7 , and through specific embodiments and their application scenarios, the simulation test system and method for a hydrogen fuel cell engine provided by this application are described in detail.

[0029] In the first aspect of this embodiment, a simulation test system for a hydrogen fuel cell engine is described.

[0030] The simulation test system for a hydrogen fuel cell engine in this embodiment includes a cabin assembly. The cabin assembly is used to place the hydrogen fuel cell engine 400. As Figure 1 shown, a test bench is arranged in the cabin assembly, and the hydrogen fuel cell engine 400 is placed on the test bench. The cabin assembly is also used to place the peripheral components of the hydrogen fuel cell engine 400 to perform integral cabin type high altitude simulation on the hydrogen fuel cell engine 400. The peripheral components include an air compressor, a water heat management system, an electronic power system, etc.

[0031] In some embodiments, the cabin assembly includes an environmental chamber body 110. Specifically, a negative pressure environment required for simulation testing is formed inside the environmental chamber body 110, and the hydrogen fuel cell engine 400 and its peripheral components are placed inside the environmental chamber body 110, as Figure 6As shown. Exemplarily, the wall thickness of the environmental chamber body 110 is 5 - 15 cm to ensure that the environmental chamber body 110 has sufficient compressive strength. Further, reinforcing ribs are provided outside the environmental chamber body 110 to further enhance the compressive strength of the environmental chamber body 110. Exemplarily, the volume of the environmental chamber body 110 is 80 - 150 m 3 .

[0032] In some embodiments, the environmental chamber body 110 is provided with a fresh air component 111. The fresh air component 111 is used to supply air to the inside of the environmental chamber body 110 and create a negative pressure environment required for simulation testing inside the environmental chamber body 110, such as Figure 1 or Figure 2 shown. The fresh air component 111 may include a fresh air blower, a humidifier, a chiller, a heater, etc. to remove impurities, control temperature and humidity of the air sent into the environmental chamber body 110. The structure of the fresh air component 111 may be the same as that of the prior art and will not be elaborated here.

[0033] In some embodiments, the environmental chamber body 110 is also provided with an exhaust port. An exhaust valve 114 is provided at the exhaust port. The exhaust valve 114 is communicated with the outside atmosphere and is used to relieve the pressure of the environmental chamber body 110, such as Figure 1 or Figure 2 shown. Exemplarily, a hydrogen concentration sensor 112 is provided at the exhaust port, such as Figure 1 or Figure 2 shown. The hydrogen concentration sensor 112 is used to detect the hydrogen concentration in the discharged gas to avoid potential safety hazards caused by too high hydrogen concentration in the discharged gas. The simulation test system for a hydrogen fuel cell engine in this embodiment further includes an intake component and an exhaust component. The intake component is used to supply hydrogen to the hydrogen fuel cell engine 400. Exemplarily, the intake component includes a hydrogen tank 210. The hydrogen tank 210 stores hydrogen, which can be used as the hydrogen source for the hydrogen fuel cell engine 400, such as Figure 6 shown. Exemplarily, the volume of the hydrogen tank 210 is 0.2 - 2 m 3 . Exemplarily, a pressure reducing valve is provided on the hydrogen tank 210 to control the intake pressure and / or flow rate of hydrogen; or the intake pressure and / or flow rate of hydrogen is controlled through a test bench. The exhaust component is used to discharge the tail gas after the test. Exemplarily, the exhaust component includes an air exhaust buffer tank 310 and a hydrogen exhaust buffer tank 320, which are respectively used to collect the air and hydrogen discharged from the hydrogen fuel cell engine 400, such as Figure 1 , Figure 3 and Figure 4 shown. Separately collecting air and hydrogen is beneficial to reducing potential safety hazards. Exemplarily, the volumes of the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 are 10 - 15 m 3 .

[0034] In some embodiments, the air intake port 410 of the hydrogen fuel cell engine 400 communicates with the environmental chamber body 110, so that the hydrogen fuel cell engine 400 can use the gas in the environmental chamber body 110 as its air source, such as Figure 1 or Figure 6 shown. The hydrogen intake port 420 of the hydrogen fuel cell engine 400 communicates with the hydrogen tank 210, and the air exhaust port 430 and the hydrogen exhaust port 440 of the hydrogen fuel cell engine 400 communicate with the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 respectively, such as Figure 1 and Figure 6 shown.

[0035] In some embodiments, the simulation test system further includes a vacuum component. The vacuum component is used to communicate with the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, and keep the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 at a preset pressure. Exemplarily, a first pressure sensor 113, a second pressure sensor 311 and a third pressure sensor 321 are respectively provided on the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, such as Figures 1 to 4 shown. The first pressure sensor 113, the second pressure sensor 311 and the third pressure sensor 321 are respectively used to detect the pressures in the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320.

[0036] Exemplarily, when the test pressure is 80 KPa, the fresh air component 111 intakes air into the environmental chamber body 110, the air intake port 410 of the hydrogen fuel cell engine 400 absorbs the air in the environmental chamber body 110, and the air and hydrogen discharged by the hydrogen fuel cell engine 400 enter the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 respectively, which will cause pressure changes in the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320. By pumping air out through the vacuum component, the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 can be kept at a preset pressure, such as 80 Kpa.

[0037] This embodiment is used for a simulation test system of a hydrogen fuel cell engine. The air intake port 410 of the hydrogen fuel cell engine 400 is connected to the environment chamber body 110. That is, the air intake port 410 of the hydrogen fuel cell engine 400 sucks the air inside the environment chamber body 110. The volume of the environment chamber body 110 is much larger than that of the air intake buffer tank, and the buffering effect of the environment chamber body 110 is better than that of the air intake buffer tank. It is difficult for the air absorbed by the air intake port 410 of the hydrogen fuel cell engine 400 to cause a pressure change inside the environment chamber body 110. Compared with the existing simulation test system, for the simulation test system of the hydrogen fuel cell engine in this embodiment, at the moment when the hydrogen fuel cell engine 400 starts, it will not cause an obvious change in the pressure of the environment chamber body 110, which can improve the pressure consistency between the environment chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, thereby being beneficial to improving the reliability of the test results.

[0038] On the other hand, for the simulation test system of the hydrogen fuel cell engine 400 in this embodiment, the air intake port 410 of the hydrogen fuel cell engine 400 is connected to the environment chamber body 110, so that the air intake buffer tank can be cancelled. Correspondingly, a set of pressure sensors and temperature sensors can also be set less, which is beneficial to simplifying the structure of the simulation test system in this embodiment and can also reduce the cost of the simulation test system.

[0039] In some embodiments, the vacuum assembly includes an intake vacuum assembly and an exhaust vacuum assembly. The intake vacuum assembly is connected to the environment chamber body 110, so that the pressure inside the environment chamber body 110 can be controlled through the intake vacuum assembly. The exhaust vacuum assembly is connected to the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, so that the pressure inside the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 can be controlled through the exhaust vacuum assembly. Preferably, the intake vacuum assembly and the exhaust vacuum assembly are adjusted independently of each other. The intake vacuum assembly and the exhaust vacuum assembly are adjusted independently of each other, that is, the intake vacuum assembly and the exhaust vacuum assembly are independent of each other and do not affect each other.

[0040] The inventor found in the research that if the same set of vacuum components is used for intake and exhaust, there is a common channel between intake and exhaust. When there is a pressure difference between the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, it is easy to cause the hidden danger of gas leakage. If the gas in the environmental chamber body 110 enters the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, since the volume of the environmental chamber body 110 is significantly larger than that of the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, it will cause large pressure fluctuations in the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, affecting the accuracy of air pressure control. If the gas in the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 enters the environmental chamber body 110, it will destroy the oxygen concentration, temperature, humidity, etc. in the environmental chamber body 110, reducing the stability of the gas environment in the environmental chamber body 110. On the other hand, since the volume of the environmental chamber body 110 is significantly larger than that of the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, using the same set of vacuum components to control the pressures of the three requires frequent adjustment of the start and stop of the pressure regulating valves on the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, with a complex control program and affected control accuracy.

[0041] This embodiment is for a simulation test system of a hydrogen fuel cell engine. The intake vacuum component is used to control the pressure in the environmental chamber body 110, and the exhaust vacuum component is used to control the pressures in the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320. This can not only avoid the hidden danger of gas leakage but also improve the control accuracy, avoid the frequent start and stop of the pressure regulating valve, and simplify the control program.

[0042] In some embodiments, the intake vacuum component includes a first vacuum component, and the first vacuum component is used to communicate with the environmental chamber body 110, so as to control the pressure in the environmental chamber body 110 through the first vacuum component. The exhaust vacuum component includes a second vacuum component and a third vacuum component. The second vacuum component is used to communicate with the air exhaust buffer tank 310, and the third vacuum component is used to communicate with the hydrogen exhaust buffer tank 320, so as to control the pressure in the air exhaust buffer tank 310 through the second vacuum component and control the pressure in the hydrogen exhaust buffer tank 320 through the third vacuum component. Preferably, the first vacuum component, the second vacuum component, and the third vacuum component are all independently adjusted. The first vacuum component, the second vacuum component, and the third vacuum component being all independently adjusted means that the first vacuum component, the second vacuum component, and the third vacuum component are independent of each other and do not affect each other.

[0043] This embodiment is used for a simulation test system of a hydrogen fuel cell engine. The vacuum assembly includes an intake vacuum assembly and an exhaust vacuum assembly, and the intake vacuum assembly and the exhaust vacuum assembly are adjusted independently of each other. Further, the exhaust vacuum assembly includes a second vacuum assembly and a third vacuum assembly, which are respectively used to control the pressures in the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320. Compared with the mixed exhaust mode of air exhaust and hydrogen exhaust of the hydrogen fuel cell engine 400, in this embodiment, the air exhaust and hydrogen exhaust of the hydrogen fuel cell engine 400 are independent of each other, which can avoid the problem of coexistence of hydrogen and oxygen in the tail gas during mixed exhaust and the potential safety hazard. Further, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 are controlled by independent vacuum assemblies, which can avoid the problem of gas leakage between the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320, thereby avoiding the introduction of hydrogen into the air exhaust buffer tank 310 and causing a safety hazard.

[0044] On the other hand, in this embodiment, the air exhaust and hydrogen exhaust of the hydrogen fuel cell engine 400 are independent of each other, and the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 are controlled by independent vacuum assemblies. It can not only be applicable to the situation where the hydrogen fuel cell engine 400 has a mixed exhaust of air exhaust and hydrogen exhaust (in this case, either the air exhaust buffer tank 310 or the hydrogen exhaust buffer tank 320 can be selected as the tail gas emission buffer tank), but also be applicable to the situation where the hydrogen fuel cell engine 400 has separate emissions of air exhaust and hydrogen exhaust.

[0045] In some embodiments, the first vacuum assembly, the second vacuum assembly, and the third vacuum assembly each include at least one vacuum pump and a vacuum pipeline, and the vacuum pipeline is used to connect the vacuum pump to one of the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320.

[0046] Exemplarily, the first vacuum assembly includes a first vacuum pump 511 and a first vacuum pipeline 512, as Figure 1 and Figure 4 shown. The first vacuum pipeline 512 is used to connect the first vacuum pump 511 to the environmental chamber body 110, as Figure 1 and Figure 4 shown. Exemplarily, the number of the first vacuum pumps 511 is one or more. The first vacuum pump 511 is a variable frequency pump, and the first vacuum pump 511 adjusts its frequency based on the pressure detected by the first pressure sensor 113. As Figure 1 and Figure 4 shown, the first vacuum assembly further includes a first water tank 513, and the first water tank 513 is used to communicate with the first vacuum pump 511.

[0047] Exemplarily, the second vacuum assembly includes a second vacuum pump 521 and a second vacuum pipeline 522, as Figure 1 and Figure 3As shown. The second vacuum pipeline 522 is used to connect the second vacuum pump 521 and the air exhaust buffer tank 310, as Figure 1 and Figure 3 shown. Exemplarily, the number of the second vacuum pumps 521 is one or more. The second vacuum pump 521 is a variable-frequency pump, and the second vacuum pump 521 adjusts its power based on the pressure detected by the second pressure sensor 311. As Figure 1 and Figure 3 shown, the second vacuum assembly further includes a second water tank 523, and the second water tank 523 is used to communicate with the second vacuum pump 521.

[0048] Exemplarily, the third vacuum assembly includes a third vacuum pump 531 and a third vacuum pipeline 532, as Figure 1 and Figure 4 shown. The third vacuum pipeline 532 is used to connect the third vacuum pump 531 and the air exhaust buffer tank 310, as Figure 1 and Figure 4 shown. Exemplarily, the number of the third vacuum pumps 531 is one or more. The third vacuum pump 531 is a variable-frequency pump, and the third vacuum pump 531 adjusts its frequency based on the pressure detected by the third pressure sensor 321. As Figure 1 and Figure 4 shown, the third vacuum assembly further includes a third water tank 533, and the third water tank 533 is used to communicate with the third vacuum pump 531.

[0049] In some embodiments, a first pressure regulating valve 540 is further provided on the vacuum pipeline, and a second pressure regulating valve 550 is further provided between the first pressure regulating valve 540 and the vacuum pump. Two ends of the second pressure regulating valve 550 are respectively communicated with a gas source and the vacuum pipeline. As Figures 1 to 4 shown, the first pressure regulating valve 540 is provided on each of the first vacuum pipeline 512, the second vacuum pipeline 522 and the third vacuum pipeline 532, and the first pressure regulating valve 540 is disposed close to the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320. One side of the first vacuum pipeline 512, the second vacuum pipeline 522 and the third vacuum pipeline 532 close to the vacuum pump is further communicated with the second pressure regulating valve 550. Exemplarily, for the second pressure regulating valve 550 communicated with the first vacuum pipeline 512, the other end is communicated with the atmosphere; for the second pressure regulating valve 550 communicated with the second vacuum pipeline 522, the other end is communicated with hydrogen or inert gas; for the second pressure regulating valve 550 communicated with the third vacuum pipeline 532, the other end is communicated with the atmosphere.

[0050] When using a vacuum pump to adjust the pressure in the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, the vacuum pump is usually a variable-frequency vacuum pump. Changing the power of the vacuum pump usually takes a certain amount of time, and there is a situation where the pressure in the environmental chamber body 110, the air exhaust buffer tank 310, and / or the hydrogen exhaust buffer tank 320 is pumped lower than the preset pressure. In this embodiment, for the simulation test system of a hydrogen fuel cell engine, when the pressure in the environmental chamber body 110, the air exhaust buffer tank 310, and / or the hydrogen exhaust buffer tank 320 is lower than the rated pressure, the second pressure regulating valve 550 is opened, and the vacuum pump can extract a certain amount of the gas source flowing in through the second pressure regulating valve 550, thereby reducing the gas extracted by the vacuum pump from the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, and further reducing the risk that the pressure in the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320 is lower than the preset pressure.

[0051] It should be noted that the preset pressure is the pressure required for the simulation test, and the rated pressure is slightly higher than the preset pressure. Exemplarily, when the preset pressure is 80 KPa, the rated pressure can be 80.5 Kpa.

[0052] As Figures 1 to 4 shown, an exhaust valve 114 is further provided on the environmental chamber body 110. The exhaust valve 114 is communicated with the outside atmosphere and is used to relieve the pressure of the environmental chamber body 110. An air pressure regulating valve 312 is further provided on the air exhaust buffer tank 310. The air pressure regulating valve 312 is directly used to adjust the pressure in the air exhaust buffer tank 310, such as filling air into the air exhaust buffer tank 310. A hydrogen pressure regulating valve 322 is further provided on the hydrogen exhaust buffer tank 320. The hydrogen pressure regulating valve 322 is directly used to adjust the pressure in the hydrogen exhaust buffer tank 320, such as filling hydrogen into the hydrogen exhaust buffer tank 320.

[0053] In some embodiments, the exhaust assembly further includes a water storage tank 330. The water storage tank 330 is communicated with the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, as Figures 1 to 4 shown. The water storage tank 330 can be one or multiple. The water storage tank 330 is used to collect the moisture in the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320. Each of the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320 is equipped with a water storage tank 330, or at least two of the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320 can share a water storage tank 330. As Figure 2 and Figure 3 shown, the water storage tank 330 communicated with the air exhaust buffer tank 310 is also communicated with the environmental chamber body 110 and is also used to collect the moisture in the environmental chamber body 110.

[0054] As Figures 1 to 4 shown, a drain valve 340 is further provided between the water storage tank 330 and the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320. The drain valve 340 is used to control the water in the environmental chamber body 110, the air exhaust buffer tank 310 and the hydrogen exhaust buffer tank 320 to flow into the water storage tank 330 for storage. A liquid level detector 350 is further provided in the water storage tank 330. The liquid level detector 350 is used to detect the water level in the water storage tank 330, as Figure 1 、 Figure 2 and Figure 4 shown. Exemplarily, the liquid level detector 350 is a float valve. When the water stored in the water storage tank 330 reaches a preset amount, the stored water in the water storage tank 330 is discharged. Discharging the excess moisture in the environmental chamber body 110 is beneficial to maintaining the humidity in the environmental chamber body 110; discharging the excess moisture in the air exhaust buffer tank 310 and / or the hydrogen exhaust buffer tank 320 can avoid the hidden danger of moisture flowing back to the air exhaust port 430 and the hydrogen exhaust port 440 of the hydrogen fuel cell engine 400.

[0055] In some embodiments, the water storage tank 330 is further provided with an air inlet pipe. A water tank air supply valve 360 is provided on the air inlet pipe. A one-way throttle valve 370 is further provided between the water tank air supply valve 360 and the water storage tank 330. The one-way throttle valve 370 is set so that gas enters the water storage tank 330 from the outside, as Figure 1 and Figure 2 shown. As Figure 1 shown, a plurality of water storage tanks 330 can share one water tank air supply valve 360 and one-way throttle valve 370. A plurality of water storage tanks 330 can also be respectively provided with one water tank air supply valve 360 and one-way throttle valve 370.

[0056] As Figure 1 、 Figure 2 and Figure 4 shown, the water storage tank 330 is further provided with a water storage tank drain valve 380. The water storage tank drain valve 380 is used to drain the water in the water storage tank 330. Specifically, when the moisture in the environmental chamber body 110, the air exhaust buffer tank 310 and / or the hydrogen exhaust buffer tank 320 needs to be drained, the corresponding drain valve 340 is opened and the water storage tank drain valve 380 is closed. When it is necessary to drain the water in the water storage tank 330, the drain valve 340 is closed and the water storage tank drain valve 380 is opened.

[0057] In the research, the inventor found that there is a problem of difficult drainage when directly discharging the water in the water storage tank 330. Specifically, when the environmental chamber body 110, the air exhaust buffer tank 310, and / or the hydrogen exhaust buffer tank 320 drain water into the water storage tank 330, the water storage tank 330 maintains the same pressure as the environmental chamber body 110, the air exhaust buffer tank 310, and / or the hydrogen exhaust buffer tank 320; when the water storage tank drain valve 380 is opened, the external air pressure is higher than the air pressure in the water storage tank 330. Only when the external atmosphere enters the water storage tank 330 through the water storage tank drain valve 380 and the pressure in the water storage tank 330 is consistent with the outside can the water be drained smoothly, which takes a long time.

[0058] This embodiment is used for a simulation test system of a hydrogen fuel cell engine. Before discharging the water in the water storage tank 330 or while discharging the water, the water tank air supply valve 360 is opened, so that the external atmosphere enters the water storage tank 330 through the one-way throttle valve 370. Only when the pressure in the water storage tank 330 is consistent with the outside is the water storage tank drain valve 380 opened, thereby improving the smoothness of drainage and saving the drainage time.

[0059] In some embodiments, the intake assembly further includes an adjustable intake buffer tank 220, as Figure 1 and Figure 5 shown. The inlet of the adjustable intake buffer tank 220 is connected to an air source, a water source, a nitrogen source, and an oxygen source, and the gas in the adjustable intake buffer tank 220 can form various oxygen concentrations and / or various humidities. Exemplarily, by controlling the content of water, air, nitrogen, and / or oxygen entering the adjustable intake buffer tank 220, the gas in the adjustable intake buffer tank 220 can form various oxygen concentrations and / or various humidities. A three-way valve 411 is provided at the air intake port 410 of the hydrogen fuel cell engine 400. The three interfaces of the three-way valve 411 are respectively connected to the environmental chamber body 110, the air intake port 410 of the hydrogen fuel cell engine 400, and the adjustable intake buffer tank 220. Exemplarily, the volume of the adjustable intake buffer tank 220 is 0.5 - 3m 3 .

[0060] Exemplarily, the adjustable intake buffer tank 220 shares a first vacuum assembly with the environmental chamber body 110, as Figure 1 , Figure 4 and Figure 5 shown. Since when the simulation test system is working, the air intake port 410 of the hydrogen fuel cell engine 400 is only connected to one of the environmental chamber body 110 and the adjustable intake buffer tank 220, and the adjustable intake buffer tank 220 shares the first vacuum assembly with the environmental chamber body 110, it does not affect the pressure control accuracy in the adjustable intake buffer tank 220 and the environmental chamber body 110, nor is there a risk of air leakage.

[0061] Exemplarily, the air source is the air inside the environmental chamber body 110, the water source is the stored water in the first water tank 513, the nitrogen source is from the nitrogen generation device 610 or the nitrogen buffer tank, and the oxygen source is from the oxygen generation device 620 or the oxygen buffer tank. The nitrogen generation device 610 or the oxygen generation device 620 can be structures in the prior art, which will not be elaborated here.

[0062] When the air intake port 410 of the hydrogen fuel cell engine 400 is communicated with the environmental chamber body 110, the air intake port 410 of the hydrogen fuel cell engine 400 absorbs the gas inside the environmental chamber body 110; when the air intake port 410 of the hydrogen fuel cell engine 400 is communicated with the adjustable intake buffer tank 220, the air intake port 410 of the hydrogen fuel cell engine 400 absorbs the gas inside the adjustable intake buffer tank 220. This kind of setting enables the air intake port 410 of the hydrogen fuel cell engine 400 to switch between two air sources, which is beneficial to simulating and testing the performance of the hydrogen fuel cell engine 400 when the local environment changes during the use of the hydrogen fuel cell engine 400; on the other hand, the volume of the adjustable intake buffer tank 220 is smaller than the volume of the environmental chamber body 110, making it easier to adjust the humidity and / or oxygen concentration inside the adjustable intake buffer tank 220, thereby shortening the time required for the air intake port 410 of the hydrogen fuel cell engine 400 to switch between two air sources; moreover, since the air source switching is carried out during the test process, there will be no problem that the volume of the adjustable intake buffer tank 220 is too small, resulting in a large change in its air pressure.

[0063] The second aspect of this embodiment describes the simulation test method for the hydrogen fuel cell engine.

[0064] The simulation test method for the hydrogen fuel cell engine in this embodiment is implemented based on the simulation test system for the hydrogen fuel cell engine in any one of the technical solutions in the first aspect of this embodiment.

[0065] Figure 7 It is the flowchart of the simulation test method for the hydrogen fuel cell engine in the embodiment of this application. As Figure 7 shown, the simulation test method for the hydrogen fuel cell engine includes at least the following steps: Step 100: Deliver air to the air intake port 410 of the hydrogen fuel cell engine 400 by using the air inside the environmental chamber body 110, and deliver hydrogen to the hydrogen intake port 420 of the hydrogen fuel cell engine 400 by using the hydrogen in the hydrogen tank 210.

[0066] Step 200: Discharge the air exhaust gas of the hydrogen fuel cell engine 400 into the air exhaust buffer tank 310, and discharge the hydrogen exhaust gas of the hydrogen fuel cell engine 400 into the hydrogen exhaust buffer tank 320.

[0067] Step 300: Obtain the pressure data of the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, adjust at least one of the multiple vacuum pumps based on the obtained pressure data, and keep the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320 at a preset pressure.

[0068] The remaining steps of the simulation test method for the hydrogen fuel cell engine in this embodiment may be the same as those in the prior art and will not be elaborated here.

[0069] The simulation test method for the hydrogen fuel cell engine in this embodiment can improve the pressure consistency among the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320, thereby facilitating the improvement of the reliability of the test results.

[0070] In some embodiments, based on the obtained pressure data inside the environmental chamber body 110, the first vacuum assembly is adjusted. Based on the obtained pressure data inside the air exhaust buffer tank 310, the second vacuum assembly is adjusted. Based on the obtained pressure data inside the hydrogen exhaust buffer tank 320, the third vacuum assembly is adjusted.

[0071] In the simulation test method for the hydrogen fuel cell engine in this embodiment, the pressures inside the environmental chamber body 110, the air exhaust buffer tank 310, and the hydrogen exhaust buffer tank 320 are independently controlled, which can not only avoid the problem of gas leakage but also improve the control accuracy, avoid the frequent start and stop of the pressure regulating valve, and simplify the control program.

[0072] In some embodiments, the simulation test method for the hydrogen fuel cell engine further includes the following steps: adjust the oxygen concentration and / or humidity of the gas inside the adjustable intake buffer tank 22, and switch the air intake port 410 of the hydrogen fuel cell engine 400 from being connected to the environmental chamber body 110 to being connected to the adjustable intake buffer tank 220.

[0073] In the simulation test method for the hydrogen fuel cell engine in this embodiment, by adjusting the oxygen concentration and / or humidity of the gas inside the adjustable intake buffer tank 220 and switching the air intake port 410 of the hydrogen fuel cell engine 400 from being connected to the environmental chamber body 110 to being connected to the adjustable intake buffer tank 220, it is beneficial to simulate and test the performance of the hydrogen fuel cell engine 400 under various environments.

[0074] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising such element.

[0075] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0076] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily conceive of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A simulation test system for a hydrogen fuel cell engine, characterized in that, It includes a cabin assembly, an intake assembly, and an exhaust assembly. Among them, the cabin assembly includes an environmental cabin body (110), the intake assembly includes a hydrogen tank (210), and the exhaust assembly includes an air exhaust buffer tank (310) and a hydrogen exhaust buffer tank (320). The environmental cabin body (110) is used to place a hydrogen fuel cell engine (400). The air intake port (410) of the hydrogen fuel cell engine (400) is communicated with the environmental cabin body (110). The hydrogen intake port (420) of the hydrogen fuel cell engine (400) is communicated with the hydrogen tank (210). The air exhaust port (430) and the hydrogen exhaust port (440) of the hydrogen fuel cell engine (400) are respectively communicated with the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320). The simulation test system for the hydrogen fuel cell engine further includes a vacuum assembly. The vacuum assembly is used to be communicated with the environmental cabin body (110), the air exhaust buffer tank (310), and the hydrogen exhaust buffer tank (320), and to keep the environmental cabin body (110), the air exhaust buffer tank (310), and the hydrogen exhaust buffer tank (320) at a preset pressure.

2. The simulation test system for a hydrogen fuel cell engine according to claim 1, characterized in that The vacuum assembly includes an intake vacuum assembly and an exhaust vacuum assembly. Among them, the intake vacuum assembly is communicated with the environmental cabin body (110), and the exhaust vacuum assembly is communicated with the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320), and the intake vacuum assembly and the exhaust vacuum assembly are adjusted independently of each other.

3. The simulation test system for a hydrogen fuel cell engine according to claim 2, characterized in that The intake vacuum assembly includes a first vacuum assembly, which is used to be communicated with the environmental cabin body (110). The exhaust vacuum assembly includes a second vacuum assembly and a third vacuum assembly. Among them, the second vacuum assembly is used to be communicated with the air exhaust buffer tank (310), and the third vacuum assembly is used to be communicated with the hydrogen exhaust buffer tank (320). The first vacuum assembly, the second vacuum assembly, and the third vacuum assembly are all adjusted independently of each other.

4. The simulation test system for a hydrogen fuel cell engine according to claim 3, characterized in that The first vacuum assembly, the second vacuum assembly, and the third vacuum assembly all include at least one vacuum pump and a vacuum pipeline. The vacuum pipeline is used to communicate the vacuum pump with one of the environmental cabin body (110), the air exhaust buffer tank (310), and the hydrogen exhaust buffer tank (320). And a first pressure regulating valve (540) is also arranged on the vacuum pipeline. A second pressure regulating valve (550) is also arranged between the first pressure regulating valve (540) and the vacuum pump. Both ends of the second pressure regulating valve (550) are communicated with the atmosphere and the vacuum pipeline respectively.

5. The simulation test system for a hydrogen fuel cell engine according to any one of claims 1 to 4, characterized in that, The exhaust assembly further includes a water storage tank (330), which is communicated with the environmental chamber body (110), the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320). A drain valve (340) is also arranged between the water storage tank (330) and the environmental chamber body (110), the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320). The drain valve (340) is used to control the water in the environmental chamber body (110), the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320) to flow into the water storage tank (330) for storage; A liquid level detector (350) is also arranged in the water storage tank (330), and the liquid level detector (350) is used to detect the water level in the water storage tank (330).

6. The simulation test system for a hydrogen fuel cell engine according to claim 5, wherein The water storage tank (330) is also provided with an air inlet pipe. A water tank air filling valve (360) is arranged on the air inlet pipe. A one-way throttle valve (370) is also arranged between the water tank air filling valve (360) and the water storage tank (330). The one-way throttle valve (370) is set so that gas enters the water storage tank (330) from the outside.

7. The simulation test system for a hydrogen fuel cell engine according to any one of claims 1 to 4, characterized in that, The intake assembly further includes an adjustable intake buffer tank (220). The inlet of the adjustable intake buffer tank (220) is communicated with an air source, a water source, a nitrogen source and an oxygen source, and the gas in the adjustable intake buffer tank (220) can form various oxygen concentrations and / or various humidities; A three-way valve (411) is arranged at the air intake port (410) of the hydrogen fuel cell engine (400). The three interfaces of the three-way valve (411) are respectively communicated with the environmental chamber body (110), the air intake port (410) of the hydrogen fuel cell engine (400) and the adjustable intake buffer tank (220).

8. A simulation test method for a hydrogen fuel cell engine, characterized in that, Based on the simulation test system for a hydrogen fuel cell engine according to any one of claims 1 to 7, the simulation test method at least includes the following steps: Use the air in the environmental chamber body (110) to deliver air to the air intake port (410) of the hydrogen fuel cell engine (400), and use the hydrogen in the hydrogen gas tank (210) to deliver hydrogen to the hydrogen intake port (420) of the hydrogen fuel cell engine (400); Discharge the air exhaust gas of the hydrogen fuel cell engine (400) into the air exhaust buffer tank (310), and discharge the hydrogen exhaust gas of the hydrogen fuel cell engine (400) into the hydrogen exhaust buffer tank (320); Obtain the pressure data of the environmental chamber body (110), the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320). Based on the obtained pressure data, adjust at least one of the multiple vacuum pumps, and keep the environmental chamber body (110), the air exhaust buffer tank (310) and the hydrogen exhaust buffer tank (320) at a preset pressure.

9. The simulation test method for a hydrogen fuel cell engine according to claim 8, characterized in that, Adjust the first vacuum assembly based on the obtained pressure data in the environmental chamber body (110); Adjust the second vacuum assembly based on the obtained pressure data in the air exhaust buffer tank (310); Adjust the third vacuum assembly based on the acquired pressure data in the hydrogen exhaust buffer tank (320).

10. The simulation test method for a hydrogen fuel cell engine according to claim 8 or 9, characterized in that, The method further includes the following steps: Adjust the oxygen concentration and / or humidity of the gas in the adjustable intake buffer tank (220), and switch the air intake port (410) of the hydrogen fuel cell engine (400) from being communicated with the environmental chamber body (110) to being communicated with the adjustable intake buffer tank (220).

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