An automatic pressure-regulating hydrogen supply system, engine, and vehicle

Abstract

This invention discloses an automatic pressure-regulating hydrogen supply system, an engine, and a vehicle. The hydrogen supply system includes: a hydrogen storage device, a pressure reducing valve, a shut-off valve, a first pressure sensor for collecting the pressure before the proportional pressure regulating valve in the pipeline, a proportional pressure regulating valve, a second pressure sensor for collecting the pressure after the proportional pressure regulating valve in the pipeline, a hydrogen rail and injector assembly, a controller, and an engine speed sensor for collecting the current engine speed. The controller is used to obtain the current operating condition of the engine based on the current engine speed, obtain the target pressure based on the current operating condition, and obtain the initial opening degree of the proportional pressure regulating valve based on the target pressure and the pressure before the valve; and dynamically adjust the opening degree of the proportional pressure regulating valve based on the target pressure, the pressure before the valve, and the pressure after the valve. Therefore, through the above scheme, the current hydrogen supply pressure can be adjusted according to changes in operating conditions, saving hydrogen consumption and meeting the engine's needs.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more particularly to an automatic pressure regulating hydrogen supply system, an engine, and a vehicle. Background Technology

[0002] Currently, most hydrogen engine hydrogen supply systems are constant-pressure systems. This means that after hydrogen exits the cylinder, it passes through one or two mechanical pressure regulating valves to reduce the pressure to the level required for normal operation, while maintaining a stable pressure. On one hand, this pressure is generally set to the maximum operating pressure required by the hydrogen supply system and cannot be adjusted according to operating conditions, resulting in increased hydrogen consumption. On the other hand, some hybrid vehicles require multiple hybrid operating conditions, including idling generator operation, and the hydrogen consumption at these operating points differs significantly from the engine's traditional operating points. Under constant pressure, the injector may fail to cover the engine's maximum and minimum flow requirements. Summary of the Invention

[0003] This invention provides an automatic pressure-regulating hydrogen supply system, an engine, and a vehicle, so that the current hydrogen supply pressure can be adjusted according to changes in operating conditions, saving hydrogen consumption and meeting engine requirements.

[0004] To achieve the above objectives, this invention provides an automatic pressure-regulating hydrogen supply system, comprising: a hydrogen storage device, a pressure reducing valve, a shut-off valve, a first pressure sensor, a proportional pressure regulating valve, a second pressure sensor, a hydrogen rail and injector assembly, arranged in series along the hydrogen delivery direction via pipelines; and a controller and an engine speed sensor.

[0005] The first pressure sensor is used to acquire the inlet pressure of the proportional pressure regulating valve in the pipeline; the second pressure sensor is used to acquire the outlet pressure of the proportional pressure regulating valve in the pipeline; the engine speed sensor is used to acquire the current engine speed;

[0006] The controller is electrically connected to the first pressure sensor, the second pressure sensor, the engine speed sensor, and the proportional pressure regulating valve, respectively. The controller is used to obtain the current operating condition of the engine based on the current speed, obtain the target pressure based on the current operating condition, obtain the initial opening of the proportional pressure regulating valve based on the target pressure and the pressure before the valve, and dynamically adjust the opening of the proportional pressure regulating valve based on the target pressure, the pressure before the valve, and the pressure after the valve.

[0007] Optionally, the controller is configured to: decrease the opening of the proportional pressure regulating valve when the downstream pressure is greater than the target pressure; and increase the opening of the proportional pressure regulating valve when the downstream pressure is less than the target pressure; wherein the adjustment amount of the opening of the proportional pressure regulating valve is the ratio of the absolute value of the difference between the downstream pressure and the target pressure to the upstream pressure.

[0008] Optionally, the initial opening is the ratio between the target pressure and the inlet pressure.

[0009] Optionally, the automatic pressure regulating hydrogen supply system further includes: a heat exchanger and a temperature sensor, wherein the heat exchanger is located at any position in the pipeline between the pressure reducing valve and the proportional pressure regulating valve; the temperature sensor is integrated with the second pressure sensor to form a pressure-temperature sensor; and the temperature sensor is used to collect the downstream temperature of the valve.

[0010] The controller is connected to the heat exchanger and the pressure and temperature sensor respectively, and is used to obtain the current operating condition of the engine according to the current speed, obtain the target valve downstream temperature according to the current operating condition, and control whether the heat exchanger is in working state according to the difference between the target valve downstream temperature and the valve downstream temperature.

[0011] Optionally, the controller is configured to control the heat exchanger to be in a shutdown state when the downstream temperature is greater than the target downstream temperature, and to control the heat exchanger to be in a working state when the downstream temperature is less than the target downstream temperature.

[0012] Optionally, the automatic pressure regulating hydrogen supply system further includes: an explosion-proof valve, one port of which is connected to the pipeline between the proportional pressure regulating valve and the second pressure sensor, and the other port of which is connected to the hydrogen discharge pipeline; the explosion-proof valve is used to open and release pressure when the pressure before the valve exceeds the preset pressure.

[0013] Optionally, the automatic pressure regulating hydrogen supply system further includes: an exhaust valve, one port of which is connected to the pipeline between the proportional pressure regulating valve and the second pressure sensor, and the other port of which is connected to the hydrogen discharge pipeline; the controller is electrically connected to the exhaust valve and is used to control the exhaust valve to be in a normally open state.

[0014] Optionally, the shut-off valve is located at any position in the pipeline between the pressure reducing valve and the first pressure sensor. The shut-off valve is also connected to the hydrogen discharge pipeline. The controller is electrically connected to the shut-off valve and is used to control the shut-off valve to open when the engine is running and to control the shut-off valve to close when the engine is stopped.

[0015] To achieve the above objectives, a second aspect of the present invention also provides an engine including the automatic pressure regulating hydrogen supply system described in any embodiment of the present invention.

[0016] To achieve the above objectives, a third aspect of the present invention also provides a vehicle including the engine described in any embodiment of the present invention.

[0017] According to embodiments of the present invention, an automatic pressure-regulating hydrogen supply system, an engine, and a vehicle are provided. The hydrogen supply system includes: a hydrogen storage device, a pressure reducing valve, a shut-off valve, a first pressure sensor, a proportional pressure regulating valve, a second pressure sensor, a hydrogen rail and injector assembly, arranged sequentially in series along the hydrogen delivery direction via a pipeline; a controller and an engine speed sensor; the first pressure sensor is used to collect the pressure before the proportional pressure regulating valve in the pipeline; the second pressure sensor is used to collect the pressure after the proportional pressure regulating valve in the pipeline; the engine speed sensor is used to collect the current engine speed; the controller is electrically connected to the first pressure sensor, the second pressure sensor, the engine speed sensor, and the proportional pressure regulating valve, respectively. The controller is used to obtain the current operating condition of the engine based on the current engine speed, obtain the target pressure based on the current operating condition, and obtain the initial opening degree of the proportional pressure regulating valve based on the target pressure and the pressure before the valve; and dynamically adjust the opening degree of the proportional pressure regulating valve based on the target pressure, the pressure before the valve, and the pressure after the valve. Therefore, through the above scheme, the current hydrogen supply pressure can be adjusted according to changes in operating conditions, saving hydrogen consumption and meeting engine requirements.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the automatic pressure regulating hydrogen supply system proposed in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of an automatic pressure regulating hydrogen supply system proposed in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of an automatic pressure-regulating hydrogen supply system proposed in another embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of an automatic pressure regulating hydrogen supply system proposed in another embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0026] Figure 1 This is a schematic diagram of the automatic pressure-regulating hydrogen supply system proposed in an embodiment of the present invention. Figure 1 As shown, the automatic pressure regulating hydrogen supply system 100 includes: a hydrogen storage device 101, a pressure reducing valve 102, a shut-off valve 103, a first pressure sensor 104, a proportional pressure regulating valve 105, a second pressure sensor 106, a hydrogen rail and injector assembly 107, which are connected in series along the hydrogen delivery direction via pipelines; as well as a controller 108 and an engine speed sensor 109.

[0027] The first pressure sensor 104 is used to collect the pressure before the proportional pressure regulating valve 105 in the pipeline; the second pressure sensor 106 is used to collect the pressure after the proportional pressure regulating valve 105 in the pipeline; the engine speed sensor 109 is used to collect the current speed of the engine.

[0028] The controller 108 is electrically connected to the first pressure sensor 104, the second pressure sensor 106, the engine speed sensor 109, and the proportional pressure regulating valve 105. The controller 108 is used to obtain the current operating condition of the engine based on the current speed, obtain the target pressure based on the current operating condition, obtain the initial opening of the proportional pressure regulating valve 105 based on the target pressure and the pressure before the valve, and dynamically adjust the opening of the proportional pressure regulating valve 105 based on the target pressure, the pressure before the valve, and the pressure after the valve.

[0029] Optionally, the controller 108 is configured to: decrease the opening of the proportional pressure regulating valve 105 when the downstream pressure is greater than the target pressure; and increase the opening of the proportional pressure regulating valve 105 when the downstream pressure is less than the target pressure; wherein the adjustment amount of the opening of the proportional pressure regulating valve 105 is the ratio of the absolute value of the difference between the downstream pressure and the target pressure to the upstream pressure.

[0030] Optionally, the initial opening is the ratio between the target pressure and the inlet pressure.

[0031] Understandably, continue to refer to Figure 1 The hydrogen storage device 101 can be a hydrogen cylinder, which stores hydrogen. When the engine is running, the controller 108 can obtain the current operating condition of the engine by collecting the current engine speed from the engine speed sensor 109, such as idling, other hybrid operating conditions, or normal operating conditions (the correspondence between operating conditions and speed can be pre-stored in the controller 108). Then, the controller 108 determines the target pressure according to the engine operating condition type (the correspondence between target pressure and operating condition type can be pre-stored in the controller 108). After determining the target pressure, the controller 108 obtains the pressure before the valve after passing through the pressure reducing valve 102 and the shut-off valve 103 when the hydrogen storage device 101 supplies hydrogen through the first pressure sensor 104. Then, the initial opening degree of the proportional pressure regulating valve 105 is determined by the ratio of the target pressure to the pressure before the valve.

[0032] For example, taking a hydrogen engine with a maximum operating pressure of 35 bar as an example, the hydrogen supply system requires an operating pressure of 35 bar at a speed of 4500 r / min, and a required operating pressure of 20 bar at idle speed of 1200 r / min. The hydrogen cylinder provides 350 bar high-pressure hydrogen, which is reduced to 35 bar by the pressure reducing valve 102. When the engine is running, the shut-off valve 103 is normally open and has no flow-blocking function. The hydrogen passes through the first pressure sensor 104, which transmits the detected pressure before the valve to the controller 108. The engine speed sensor 109 transmits the current engine speed to the controller 108. The controller 108 determines the required hydrogen pressure (hereinafter referred to as the target pressure) for this operating condition based on the engine speed. Based on the inlet pressure and the target pressure, it determines the initial valve opening in the proportional pressure regulating valve 105's opening MAP and transmits a proportional signal to the proportional pressure regulating valve 105, converting the proportional signal into electromagnetic force excitation to control the valve's rotation. The valve's opening degree is controlled based on its rotation, and then fed back to the controller 108. The valve spring is adjusted according to the feedback signal to precisely control the valve opening, thereby reducing the outlet pressure to the target pressure. The pressure reducing valve 102 is a first-stage pressure reducing valve.

[0033] After adjusting the initial opening of the proportional pressure regulating valve 105, the downstream pressure can be continuously measured to determine if it is actually the same as the target pressure. If the downstream pressure is less than the target pressure, it indicates that the opening of the proportional pressure regulating valve 105 is too small, and the opening needs to be increased. Conversely, if the downstream pressure is greater than the target pressure, it indicates that the opening of the proportional pressure regulating valve 105 is too large, and the opening needs to be decreased. It can be understood that the adjustment amount of the opening of the proportional pressure regulating valve 105 is the ratio of the absolute value of the difference between the downstream pressure and the target pressure to the upstream pressure.

[0034] It should be noted that when the controller 108 detects a change in the engine operating condition based on the engine speed sensor 109, it can re-control the initial opening of the proportional pressure regulating valve 105 and then fine-tune the proportional pressure regulating valve 105 according to the pressure after the valve.

[0035] In particular, a port is provided in the pipeline between the proportional pressure regulating valve 105 and the second pressure sensor 106, which is connected to the hydrogen discharge pipeline 110.

[0036] Therefore, the solution proposed in this invention allows for precise adjustment of the hydrogen supply system's operating pressure. Specifically, the controller can issue commands based on the engine's actual operating conditions to control the opening of the proportional pressure regulating valve, achieving active adjustment. Furthermore, it can continuously and precisely adjust the pressure based on the difference between the feedback pressure after the valve (actual operating pressure) and the target pressure, overcoming the shortcomings of existing structures that lack adjustment capabilities or have limited adjustment capabilities.

[0037] Optionally, such as Figure 2 and Figure 3 As shown, the automatic pressure regulating hydrogen supply system 100 also includes: a heat exchanger 111 and a temperature sensor. The heat exchanger 111 is located at any position in the pipeline between the pressure reducing valve 102 and the proportional pressure regulating valve 105. The temperature sensor is integrated with the second pressure sensor 106 to form a pressure-temperature sensor 112. The temperature sensor is used to collect the temperature after the valve.

[0038] The controller 108 is connected to the heat exchanger 111 and the pressure and temperature sensor 112 respectively. It is used to obtain the current operating condition of the engine according to the current speed, obtain the target valve downstream temperature according to the current operating condition, and control whether the heat exchanger 111 is in working state according to the difference between the target valve downstream temperature and the valve downstream temperature.

[0039] Optionally, the controller 108 is configured to control the heat exchanger 111 to be in a shutdown state when the downstream temperature is greater than the target downstream temperature, and to control the heat exchanger 111 to be in a working state when the downstream temperature is less than the target downstream temperature.

[0040] Understandably, the heat exchanger 111 is connected to the vehicle's thermal circuit to prevent hydrogen from absorbing heat during decompression, which could cause the pressure regulator's temperature to drop rapidly and freeze. Furthermore, hydrogen density is greatly affected by temperature and pressure. The hydrogen temperature can be controlled according to the actual operating conditions. The downstream temperature is the actual operating temperature of the engine. When the downstream temperature is higher than the target downstream temperature, it means that heating the hydrogen is unnecessary, and the heat exchanger 111 does not need to operate. Conversely, when the downstream temperature is lower than the target downstream temperature, it means that the hydrogen temperature is too low, which can easily cause hydrogen frost. Therefore, it is necessary to keep the heat exchanger 111 operational to heat the hydrogen and prevent frost formation.

[0041] Optionally, such as Figure 4 As shown, the automatic pressure regulating hydrogen supply system 100 also includes an explosion-proof valve 113. One port of the explosion-proof valve 113 is connected to the pipeline between the proportional pressure regulating valve 105 and the second pressure sensor 106, and the other port of the explosion-proof valve 113 is connected to the hydrogen discharge pipeline 110. The explosion-proof valve 113 is used to open and release pressure when the pressure before the valve exceeds the preset pressure. This helps to protect the pipeline and prevent the pipeline from bursting due to excessive pressure.

[0042] Optionally, such as Figure 4 As shown, the automatic pressure regulating hydrogen supply system 100 also includes: an exhaust valve 114, one port of which is connected to the pipeline between the proportional pressure regulating valve 105 and the second pressure sensor 106, and the other port of which is connected to the hydrogen discharge pipeline 110; a controller 108 is electrically connected to the exhaust valve 114 and is used to control the exhaust valve to be in a normally open state. This allows residual hydrogen in the pipeline to be discharged after the engine is stopped.

[0043] Optionally, such as Figure 4 As shown, the shut-off valve 103 is located at any position in the pipeline between the pressure reducing valve 102 and the first pressure sensor 104. The shut-off valve 103 is also connected to the hydrogen discharge pipeline 110. The controller 108 is electrically connected to the shut-off valve 103 and is used to control the shut-off valve 103 to open when the engine is running and to control the shut-off valve 103 to close when the engine is stopped. In this way, the supply of hydrogen can be controlled according to the engine operating conditions at any time. Furthermore, when the engine is stopped, the shut-off valve 103 is controlled to close, cutting off the hydrogen supply. One port of the shut-off valve 103 is connected to the hydrogen discharge pipeline 110, which can discharge excess hydrogen and prevent the pipeline from bursting due to excessive pressure.

[0044] The automatic pressure-regulating hydrogen supply system 100 proposed in this embodiment of the invention features a proportional pressure regulating valve 105 installed before the hydrogen rail and injector assembly 107. The proportional pressure regulating valve 105 integrates an electric actuator, which receives a proportional control signal from the controller 108 and converts it into electromagnetic force excitation to control the valve opening. Simultaneously, a first pressure sensor 104 is installed before the proportional pressure regulating valve 105 to transmit the upstream pressure to the controller 108; a second pressure sensor 106 is installed on the hydrogen rail and injector assembly 107 to transmit the downstream pressure to the controller 108. Meanwhile, when the module integrates the heat exchanger 111, the second pressure sensor 106 can integrate a temperature sensor as a pressure-temperature sensor 112 (the pressure-temperature sensor connection end is a quick-connect connector), which is connected to the vehicle's thermal circuit to control the hydrogen temperature within the range required by the engine; it also integrates an explosion-proof valve 113 to release pressure when the hydrogen exceeds the safe pressure; it integrates a shut-off valve 103 to cut off the hydrogen supply to the pipeline when the engine stops; and it integrates an exhaust valve 114 to discharge residual pressure in the system after the engine stops.

[0045] Compared to existing technologies, this system automatically adjusts the pressure of the hydrogen supply system 100 during engine operation by monitoring engine speed, pre-valve pressure, and the temperature and pressure (post-valve temperature and pressure) of the hydrogen supply system within the hydrogen rail. The opening of the proportional pressure regulating valve 105 is controlled in real-time by an electronically controlled actuator within the proportional pressure regulating valve 105. Compared to liquid fuels, the density of gaseous fuels is more significantly affected by temperature and pressure. Therefore, the injector flow rate varies considerably under different operating pressures. By using this system to adjust the hydrogen supply system pressure in real-time according to engine operating conditions, the injector can cover a wider range of flow rate requirements. Furthermore, because the hydrogen supply system pressure can be adjusted, it better adapts to operating conditions, reducing hydrogen consumption.

[0046] This invention also proposes an engine that includes the automatic pressure regulating hydrogen supply system described in any embodiment of this invention.

[0047] This invention also provides a vehicle comprising the engine described in any embodiment of this invention.

[0048] In summary, the automatic pressure-regulating hydrogen supply system, engine, and vehicle proposed in the embodiments of the present invention include: a hydrogen storage device, a pressure reducing valve, a shut-off valve, a first pressure sensor, a proportional pressure regulating valve, a second pressure sensor, a hydrogen rail and injector assembly arranged in series along the hydrogen delivery direction via pipelines; a controller and an engine speed sensor; the first pressure sensor is used to collect the pressure before the proportional pressure regulating valve in the pipeline; the second pressure sensor is used to collect the pressure after the proportional pressure regulating valve in the pipeline; the engine speed sensor is used to collect the current engine speed; the controller is electrically connected to the first pressure sensor, the second pressure sensor, the engine speed sensor, and the proportional pressure regulating valve, respectively, and is used to obtain the current operating condition of the engine based on the current engine speed, obtain the target pressure based on the current operating condition, obtain the initial opening degree of the proportional pressure regulating valve based on the target pressure and the pressure before the valve; and dynamically adjust the opening degree of the proportional pressure regulating valve based on the target pressure, the pressure before the valve, and the pressure after the valve. Therefore, the above scheme allows the current hydrogen supply pressure to be adjusted according to changes in operating conditions, saving hydrogen consumption and meeting engine requirements.

[0049] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An automatic pressure-regulating hydrogen supply system, characterized in that, include: Along the direction of hydrogen transport, a hydrogen storage device, a pressure reducing valve, a shut-off valve, a first pressure sensor, a proportional pressure regulating valve, a second pressure sensor, a hydrogen rail and injector assembly are connected in series via pipelines; as well as a controller and an engine speed sensor. The first pressure sensor is used to acquire the inlet pressure of the proportional pressure regulating valve in the pipeline; the second pressure sensor is used to acquire the outlet pressure of the proportional pressure regulating valve in the pipeline; the engine speed sensor is used to acquire the current engine speed; The controller is electrically connected to the first pressure sensor, the second pressure sensor, the engine speed sensor, and the proportional pressure regulating valve, respectively. The controller is used to obtain the current operating condition of the engine based on the current speed, obtain the target pressure based on the current operating condition, and obtain the initial opening degree of the proportional pressure regulating valve based on the target pressure and the pressure before the valve. The controller dynamically adjusts the opening of the proportional pressure regulating valve based on the target pressure, the inlet pressure, and the outlet pressure. The controller is configured to: decrease the opening of the proportional pressure regulating valve when the outlet pressure is greater than the target pressure; and increase the opening of the proportional pressure regulating valve when the outlet pressure is less than the target pressure. The adjustment amount of the proportional pressure regulating valve opening is the ratio of the absolute value of the difference between the outlet pressure and the target pressure to the inlet pressure.

2. The automatic pressure regulating hydrogen supply system according to claim 1, characterized in that, The initial opening is the ratio between the target pressure and the inlet pressure.

3. The automatic pressure regulating hydrogen supply system according to claim 1, characterized in that, Also includes: A heat exchanger and a temperature sensor are provided, wherein the heat exchanger is located at any position in the pipeline between the pressure reducing valve and the proportional pressure regulating valve; the temperature sensor is integrated with the second pressure sensor to form a pressure-temperature sensor; the temperature sensor is used to collect the temperature after the valve. The controller is connected to the heat exchanger and the pressure and temperature sensor respectively, and is used to obtain the current operating condition of the engine according to the current speed, obtain the target valve downstream temperature according to the current operating condition, and control whether the heat exchanger is in working state according to the difference between the target valve downstream temperature and the valve downstream temperature.

4. The automatic pressure regulating hydrogen supply system according to claim 3, characterized in that, The controller is used to control the heat exchanger to be in a shutdown state when the downstream temperature is greater than the target downstream temperature, and to control the heat exchanger to be in a working state when the downstream temperature is less than the target downstream temperature.

5. The automatic pressure regulating hydrogen supply system according to claim 1, characterized in that, Also includes: An explosion-proof valve is provided, with one port connected to the pipeline between the proportional pressure regulating valve and the second pressure sensor, and the other port connected to the hydrogen discharge pipeline; the explosion-proof valve is used to open and release pressure when the pressure before the valve exceeds a preset pressure.

6. The automatic pressure regulating hydrogen supply system according to claim 1, characterized in that, Also includes: An exhaust valve is provided, with one port connected to the pipeline between the proportional pressure regulating valve and the second pressure sensor, and the other port connected to the hydrogen discharge pipeline; the controller is electrically connected to the exhaust valve and is used to control the exhaust valve to be in a normally open state.

7. The automatic pressure regulating hydrogen supply system according to claim 1, characterized in that, The shut-off valve is located at any position in the pipeline between the pressure reducing valve and the first pressure sensor. The shut-off valve is also connected to the hydrogen discharge pipeline. The controller is electrically connected to the shut-off valve and is used to control the shut-off valve to open when the engine is running and to control the shut-off valve to close when the engine is stopped.

8. An engine, characterized in that, Includes the automatic pressure regulating hydrogen supply system as described in any one of claims 1-7.

9. A vehicle, characterized in that, Including the engine as described in claim 8.

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