CN221169775U - Air supply system and engine system with same - Google Patents

Abstract

The utility model provides an air supply system and an engine system with the same. The gas supply system is used for conveying fuel gas into the engine, and the gas supply system comprises: a gas supply device; the first pipeline comprises a main pipeline, a first branch pipeline and a second branch pipeline; the first control valve is used for controlling the on-off state of the main pipeline and the second control valve is used for controlling the on-off state of the second branch pipeline; the pressure relief device is provided with a pressure relief cavity and a first air inlet communicated with the pressure relief cavity; when the first control valve is closed and the second control valve is opened, at least part of fuel gas in the main pipeline and fuel gas in the second branch pipeline flow into the pressure release cavity, and the pressure release device is used for releasing pressure on the part of main pipeline and the second branch pipeline by containing the fuel gas; when the first control valve is opened and the second control valve is closed, the gas supply device supplies fuel gas into the engine. The utility model effectively solves the problem of lower operation safety of the hydrogen internal combustion engine system in the prior art.

Description

Air supply system and engine system with same

Technical Field

The utility model relates to the technical field of internal combustion engines, in particular to an air supply system and an engine system with the same.

Background

Currently, a hydrogen internal combustion engine system mainly includes a hydrogen internal combustion engine and a hydrogen supply system that communicates with the hydrogen internal combustion engine, the hydrogen supply system supplying hydrogen into the hydrogen internal combustion engine, the hydrogen internal combustion engine using the hydrogen as a fuel to output kinetic energy.

In the prior art, a hydrogen supply system generally comprises a hydrogen gas cylinder, an electromagnetic cut-off valve, a safety valve and other components. In the starting state, the electromagnetic switching valve and the safety valve are opened, and high-pressure hydrogen in the hydrogen cylinder can be conveyed to the hydrogen internal combustion engine through a pipeline and burnt for working. In a stopped state, the electromagnetic shut-off valve and the safety valve close and shut off the pipeline to ensure that the hydrogen supply system stops delivering hydrogen into the hydrogen internal combustion engine.

However, in the parking state, a large amount of high-pressure hydrogen is stored in the pipeline along with the closing of the electromagnetic cut-off valve and the safety valve, and the high-pressure hydrogen is easy to leak from the pipeline, even burn and explode due to the special physical characteristics, so that the personal safety of a driver is seriously influenced.

Disclosure of utility model

The utility model mainly aims to provide an air supply system and an engine system with the same, so as to solve the problem of lower operation safety of a hydrogen internal combustion engine system in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided an air supply system for supplying fuel gas into an engine, the air supply system comprising: the air supply device is provided with a first air outlet; the first pipeline comprises a main pipeline, a first branch pipeline and a second branch pipeline, and the first branch pipeline and the second branch pipeline are communicated with the main pipeline; the first control valve is arranged on the main pipeline and used for controlling the on-off state of the main pipeline, and the second control valve is arranged on the second branch pipeline and used for controlling the on-off state of the second branch pipeline; the pressure relief device is provided with a pressure relief cavity and a first air inlet communicated with the pressure relief cavity; the first air outlet is communicated with a second air inlet of the engine through a main pipeline and a first branch pipeline, the first air outlet is communicated with the first air inlet through the main pipeline and the second branch pipeline, when the first control valve is closed and the second control valve is opened, at least part of fuel gas in the main pipeline and fuel gas in the second branch pipeline flow into the pressure relief cavity, and the pressure relief device is used for relieving pressure of the part of the main pipeline and the second branch pipeline by containing the fuel gas; when the first control valve is opened and the second control valve is closed, the gas supply device supplies fuel gas into the engine.

Further, the first end of the main pipeline is communicated with the first air outlet, the first end of the first branch pipeline is communicated with the second end of the main pipeline, the second end of the first branch pipeline is communicated with the second air inlet, the first end of the second branch pipeline is communicated with the second end of the main pipeline, and the second end of the second branch pipeline is communicated with the first air inlet.

Further, the air supply system further includes: the first pressure detection device is arranged on the first branch pipeline and is used for detecting the pressure value of the fuel gas in the first branch pipeline; the timing module is electrically connected with the engine and is used for timing the stop time of the engine; the control module is connected with the engine, the timing module, the first control valve, the second control valve and the first pressure detection device; when the engine is started, the control module controls the first control valve to be opened and the second control valve to be closed; when the engine is stopped, the control module controls the timing module to start timing, and when the timing value of the timing module reaches a first preset value, the control module controls the first control valve to be closed, and controls the second control valve to be opened or closed according to the detection value of the first pressure detection device.

Further, the pressure relief device still has the second gas outlet with pressure relief chamber intercommunication, and the air feed system still includes: the first end of the second pipeline is communicated with the second air outlet, and the second end of the second pipeline is communicated with the air utilization equipment; the third control valve is arranged on the second pipeline and used for controlling the on-off state of the second pipeline; when the third control valve is opened, at least part of fuel gas in the pressure release cavity flows into the gas utilization equipment.

Further, the air supply system further includes: the burner is provided with a third air inlet, the second end of the second pipeline is communicated with the third air inlet, and the burner is used for heating cooling liquid of the engine by heating the cooling liquid pipeline of the engine.

Further, the air supply system further includes: the second pressure detection device is arranged on the second pipeline and is positioned between the pressure relief device and the third control valve, and the second pressure detection device is used for detecting the gas pressure value in the second pipeline; the temperature detection device is arranged on the cooling liquid pipeline and is used for detecting the temperature value of cooling liquid in the cooling liquid pipeline; the control module controls the third control valve to be opened when the detected value of the second pressure detection device reaches a second preset value and the detected value of the temperature detection device reaches a third preset value; the control module controls the third control valve to close when the engine is stopped.

Further, the second end of the second pipeline is communicated with the second air inlet, and at least part of fuel gas in the pressure release cavity flows back into the engine through the second pipeline.

Further, the air supply system further includes: the second pressure detection device is arranged on the second pipeline and is positioned between the pressure relief device and the third control valve, and the second pressure detection device is used for detecting the gas pressure value in the second pipeline; the second pressure detection device is electrically connected with the control module, and when the engine is started, the control module controls the third control valve to be opened or closed according to the detection value of the second pressure detection device.

Further, the air supply system further includes: and the check valve is arranged on the second branch pipeline and/or the second pipeline.

According to another aspect of the present utility model, there is provided an engine system including an air supply system and an engine, the air supply system being the air supply system described above.

By applying the technical scheme of the utility model, the air supply system is used for conveying fuel gas into the engine, the air supply device of the air supply system is provided with a first air outlet, the first pipeline comprises a main pipeline, a first branch pipeline and a second branch pipeline, the first branch pipeline and the second branch pipeline are both communicated with the main pipeline, the first control valve is arranged on the main pipeline and used for controlling the on-off state of the main pipeline, the second control valve is arranged on the second branch pipeline and used for controlling the on-off state of the second branch pipeline, and the pressure relief device is provided with a pressure relief cavity and a first air inlet communicated with the pressure relief cavity. The first air outlet is communicated with the second air inlet of the engine through a main pipeline and a first branch pipeline, the first air outlet is communicated with the first air inlet through the main pipeline and a second branch pipeline, when the first control valve is closed and the second control valve is opened, at least part of fuel gas in the main pipeline and fuel gas in the second branch pipeline flow into the pressure relief cavity, and the pressure relief device is used for containing the fuel gas so as to relieve the pressure of the part of main pipeline and the second branch pipeline, and when the first control valve is opened and the second control valve is closed, the air supply device is used for conveying the fuel gas into the engine. Thus, when the engine is running, the first control valve is opened, the second control valve is closed, the air supply device can normally supply fuel gas to the engine so as to ensure that the engine can normally run, and when the engine is stopped, the first control valve is closed, the second control valve is opened, on one hand, the communication between the air supply device and the engine is cut off so as to ensure that the air supply device stops supplying fuel gas to the engine; on the other hand, partial high-pressure fuel gas in the first pipeline can flow into the accommodating cavity of the pressure relief device, so that partial first pipeline is timely relieved, the safety problem of a user caused by leakage of the fuel gas in the first pipeline is avoided, and the problem that the operation safety of a hydrogen internal combustion engine system in the prior art is lower is solved. Simultaneously, pressure release device can store the gas to retrieve, recycle the gas, and then make gas supply system more green, environmental protection.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic overall structure of an embodiment one of an air supply system according to the present utility model;

fig. 2 shows a schematic overall structure of a second embodiment of the air supply system according to the present utility model.

Wherein the above figures include the following reference numerals:

10. An engine; 11. a second air inlet; 20. a pressure relief device; 21. a first air inlet; 22. a second air outlet; 30. a gas supply device; 31. a first air outlet; 40. a first pipeline; 41. a main pipeline; 42. a first branch pipe; 43. a second branch pipe; 50. a first control valve; 60. a second control valve; 70. a first pressure detection device; 80. a second pipeline; 90. a third control valve; 100. a burner; 101. a third air inlet; 110. a second pressure detecting means; 130. a one-way valve.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

In order to solve the problem of lower operation safety of a hydrogen internal combustion engine system in the prior art, the application provides a gas supply system and an engine system with the gas supply system.

Example 1

As shown in fig. 1, the gas supply system is for supplying gas into the engine 10, and includes a gas supply device 30, a first pipe 40, a first control valve 50, and a second control valve 60, wherein the gas supply device 30 has a first gas outlet 31. The first pipe 40 includes a main pipe 41, a first branch pipe 42, and a second branch pipe 43, and the first branch pipe 42 and the second branch pipe 43 are both in communication with the main pipe 41. The first control valve 50 is provided on the main pipe 41 for controlling the on-off state of the main pipe 41. The second control valve 60 is disposed on the second branch pipe 43 for controlling the on-off state of the second branch pipe 43. The pressure relief device 20 has a pressure relief chamber and a first air inlet 21 communicating with the pressure relief chamber. The first air outlet 31 is communicated with the second air inlet 11 of the engine 10 through a main pipeline 41 and a first branch pipeline 42, the first air outlet 31 is communicated with the first air inlet 21 through the main pipeline 41 and a second branch pipeline 43, when the first control valve 50 is closed and the second control valve 60 is opened, at least part of the fuel gas in the main pipeline 41 and the fuel gas in the second branch pipeline 43 flow into the pressure relief cavity, and the pressure relief device 20 is used for relieving the pressure of the main pipeline 41 and the second branch pipeline 43 by containing the fuel gas. When the first control valve 50 is opened and the second control valve is closed, the gas supply device 30 supplies fuel gas into the engine 10.

By applying the technical scheme of the embodiment, the air supply system is used for conveying fuel gas into the engine 10, the air supply device 30 of the air supply system is provided with a first air outlet 31, the first pipeline 40 comprises a main pipeline 41, a first branch pipeline 42 and a second branch pipeline 43, the first branch pipeline 42 and the second branch pipeline 43 are communicated with the main pipeline 41, the first control valve 50 is arranged on the main pipeline 41 and used for controlling the on-off state of the main pipeline 41, and the second control valve 60 is arranged on the second branch pipeline 43 and used for controlling the on-off state of the second branch pipeline 43, and the pressure relief device 20 is provided with a pressure relief cavity and a first air inlet 21 communicated with the pressure relief cavity. The first air outlet 31 is communicated with the second air inlet 11 of the engine 10 through a main pipeline 41 and a first branch pipeline 42, the first air outlet 31 is communicated with the first air inlet 21 through the main pipeline 41 and a second branch pipeline 43, when the first control valve 50 is closed and the second control valve 60 is opened, at least part of the fuel gas in the main pipeline 41 and the fuel gas in the second branch pipeline 43 flow into the pressure relief cavity, the pressure relief device 20 is used for relieving the pressure of the main pipeline 41 and the second branch pipeline 43 by containing the fuel gas, and when the first control valve 50 is opened and the second control valve 60 is closed, the air supply device 30 is used for supplying the fuel gas into the engine 10. Thus, when the engine 10 is running, the first control valve 50 is opened, the second control valve 60 is closed, the air supply device 30 can normally supply fuel gas to the engine 10 to ensure that the engine 10 can normally run, and when the engine 10 is stopped, the first control valve 50 is closed, the second control valve 60 is opened, on the one hand, the communication between the air supply device 30 and the engine 10 is cut off to ensure that the air supply device 30 stops supplying fuel gas to the engine 10; on the other hand, part of the high-pressure fuel gas in the first pipeline 40 can flow into the accommodating cavity of the pressure relief device 20, so that part of the first pipeline 40 is timely relieved, the safety problem of a user caused by leakage of the fuel gas in the first pipeline 40 is avoided, and the problem that the operation safety of the hydrogen internal combustion engine system is lower in the prior art is solved. Meanwhile, the pressure relief device 20 can store the fuel gas so as to recycle the fuel gas, and further the air supply system is more green and environment-friendly.

In the present embodiment, the first control valve 50 and the second control valve 60 are both electromagnetic shut-off valves.

In this embodiment, the fuel gas is hydrogen.

In this embodiment, a safety valve is further disposed between the first control valve 50 and the first air outlet 31, and when the gas pressure value between the first control valve 50 and the first air outlet 31 is too large, the safety valve can be opened and depressurized to improve the operation safety of the air supply system.

In this embodiment, the first branch pipe 42 is further provided with a pressure regulating valve and a filter, and the filter can filter the compressed gas to avoid the gas carrying impurities from flowing into the engine 10, which may cause the engine 10 to be blocked or even damaged, thereby prolonging the service life of the engine 10. The pressure regulating valve is capable of regulating the amount of gas pressure flowing into the engine 10 to ensure that the gas pressure meets the operating requirements of the engine 10.

In the present embodiment, the engine 10 is a hydrogen internal combustion engine.

As shown in fig. 1, the first end of the main pipe 41 communicates with the first air outlet 31, the first end of the first branch pipe 42 communicates with the second end of the main pipe 41, the second end of the first branch pipe 42 communicates with the second air inlet 11, the first end of the second branch pipe 43 communicates with the second end of the main pipe 41, and the second end of the second branch pipe 43 communicates with the first air inlet 21. In this way, when the first control valve 50 is opened and the second control valve 60 is closed, the fuel gas output from the gas supply device 30 can flow into the engine 10 after flowing through the first end of the main pipe 41, the first end of the first branch pipe 42, the second branch pipe 43, and the second end of the second branch pipe 43 in this order, so as to realize the gas supply function of the gas supply system. Meanwhile, when the first control valve 50 is closed and the second control valve 60 is opened, the delivery pipeline between the air supply device 30 and the engine 10 is cut off by the first control valve 50, and the fuel gas between the first control valve 50 and the first air inlet 21 flows into the pressure relief cavity to reduce the fuel gas pressure, thereby realizing the pressure relief function of the air supply system.

As shown in fig. 1, the air supply system further includes a first pressure detecting device 70, a timing module and a control module, where the first pressure detecting device 70 is disposed on the first branch pipe 42, and the first pressure detecting device 70 is used for detecting a pressure value of the fuel gas in the first branch pipe 42. A timing module is electrically connected with engine 10 for timing the duration of the shutdown of engine 10. The control module is connected to the engine 10, the timing module, the first control valve 50, the second control valve 60, and the first pressure detecting device 70. Wherein, when the engine 10 is started, the control module controls the first control valve 50 to be opened and the second control valve 60 to be closed; when the engine 10 is stopped, the control module controls the timing module to start timing, and when the timing value of the timing module reaches a first preset value, the control module controls the first control valve 50 to be closed, and controls the second control valve 60 to be opened or closed according to the detection value of the first pressure detection device 70. In this way, by providing the first pressure detecting device 70 and the timing module, the opening or closing timing of the first control valve 50 and the second control valve 60 can be ensured to be appropriate, so that the function of the air supply system can be ensured to be matched with the running state of the engine 10 when the function of the air supply system is switched, and the air supply system is more intelligent and reasonable. Meanwhile, the automatic opening and closing of the first control valve 50 and the second control valve 60 are realized through the control module, so that the automatic operation of the air supply system is realized, and the operation difficulty of staff is further reduced.

In this embodiment, since the fuel gas is required to perform the function when the engine 10 is started, the control module controls the first control valve 50 to open and the second control valve 60 to close when the engine 10 is started, so that the gas supply device 30 can supply the fuel gas to the engine 10 in time.

In this embodiment, when the engine 10 is stopped, the user may stop temporarily or stop for a long time, so when the engine 10 is stopped, the control module will control the timing module to start timing first, when the timing value of the timing module reaches the first preset value, the user is judged to stop for a long time and perform the subsequent operation, so that the air supply system decompresses the first pipeline 40 in the process of stopping temporarily by the user, and when the user starts the engine 10 again, a large amount of fuel gas is needed to re-punch the first pipeline 40, thereby causing fuel gas waste, and further making the air supply system more green and environment-friendly.

In this embodiment, when the timing value of the timing module reaches the first preset value, the control module controls the first control valve 50 to be closed, and controls the second control valve 60 to be opened or closed according to the detection value of the first pressure detection device 70. Like this, if the detected value of the first pressure detecting device 70 does not reach the preset value, it indicates that the gas pressure value in the first pipeline 40 is smaller, and there is no leakage risk, that is, no pressure relief is needed, and the control module does not control the second control valve 60 to be opened at this time, so as to avoid that a large amount of gas without leakage risk flows into the pressure relief cavity, and the gas is wasted, so that the gas supply system is more intelligent, green and reasonable.

As shown in fig. 1, the pressure relief device 20 further has a second air outlet 22 in communication with the pressure relief chamber, and the air supply system further includes a second conduit 80 and a third control valve 90, the first end of the second conduit 80 being in communication with the second air outlet 22, and the second end of the second conduit 80 being in communication with the air consuming apparatus. A third control valve 90 is provided on the second pipe 80 for controlling the on-off state of the second pipe 80. Wherein, when the third control valve 90 is opened, at least part of the fuel gas in the pressure release chamber flows into the gas utilization device. Therefore, on one hand, the gas stored in the pressure release cavity can be introduced into the gas utilization equipment to realize the reutilization of the gas, and the gas supply system is more environment-friendly; on the other hand, the working personnel can control the on-off state between the pressure relief device 20 and the air consumption equipment by operating the third control valve 90, so that the on-off state between the pressure relief device 20 and the air consumption equipment can be matched with the running state of other parts of the air supply system, the operation difficulty of the working personnel is reduced, and the air supply system is more intelligent and reasonable.

As shown in fig. 1, the air supply system further includes a burner 100, the air-using device is the burner 100, the burner 100 has a third air inlet 101, the second end of the second pipe 80 is communicated with the third air inlet 101, and the burner 100 heats the coolant of the engine 10 by heating the coolant pipe of the engine 10. Thus, by arranging the burner 100, on one hand, the reuse of the fuel gas in the pressure relief cavity is realized; on the other hand, the burner 100 can heat the cooling liquid of the engine 10 to realize the accelerating "hot car" function of the air supply system, so that the functions of the air supply system are more abundant and various, and the use experience of a user is also improved.

As shown in fig. 1, the air supply system further includes a second pressure detecting device 110 and a temperature detecting device, the second pressure detecting device 110 is disposed on the second pipeline 80 and located between the pressure releasing device 20 and the third control valve 90, and the second pressure detecting device 110 is used for detecting the pressure value of the fuel gas in the second pipeline 80. The temperature detection device is arranged on the cooling liquid pipeline and is used for detecting the temperature value of cooling liquid in the cooling liquid pipeline. The third control valve 90, the second pressure detecting device 110 and the temperature detecting device are all connected with the control module, and when the engine 10 is started, if the detected value of the second pressure detecting device 110 reaches the second preset value and the detected value of the temperature detecting device reaches the third preset value, the control module controls the third control valve 90 to be opened. The control module controls the third control valve 90 to close when the engine 10 is shut down. Thus, by providing the second pressure detecting means 110 and the temperature detecting means, it is possible to ensure that the opening or closing timing of the third control valve 90 is appropriate, so as to ensure that the function of the air supply system can be matched with the operating state of the engine 10 at the time of function switching. Meanwhile, the automatic opening and closing of the third control valve 90 are realized through the control module, so that the automatic operation of the air supply system is realized, and the operation difficulty of staff is further reduced.

In this embodiment, when the engine 10 is in a stop state, the engine 10 does not need to perform a hot "hot car" operation, and the control module controls the third control valve 90 to be closed at this time, so as to avoid gas waste, and further make the gas supply system more green and environment-friendly.

In this embodiment, when the engine 10 is in an operating state, the temperature of the cooling liquid is detected by the temperature detecting device, so as to determine whether the engine 10 needs to perform "hot-rolling" (i.e. when the detected value of the temperature detecting device does not reach the third preset value, "hot-rolling" is required by the engine 10, when the detected value of the temperature detecting device reaches the third preset value, "hot-rolling" is not required by the engine 10), if the engine 10 needs to perform "hot-rolling", the detected value of the second pressure detecting device 110 can determine whether the gas pressure value in the pressure relief device 20 can meet the operation requirement of the combustor 100, and the control module can control the third control valve 90 to be opened only when the engine 10 needs to perform "hot-rolling" and the gas pressure value in the pressure relief device 20 meets the operation requirement of the combustor 100, so that on one hand, the waste of gas is avoided, on the other hand, the operation stability of the combustor 100 can be ensured, and the environmental protection and the operation stability of the gas supply system can be further improved.

As shown in fig. 1, the air supply system further comprises a non-return valve 130, the non-return valve 130 being arranged on the second branch line 43 and/or the second line 80. In this way, on the one hand, the check valve 130 is provided to prevent the gas in the pressure release cavity or the mixed gas in the burner 100 from flowing back into the engine 10 to affect the normal operation of the engine 10, so as to improve the operation stability of the gas supply system; on the other hand, the setting position of the drop killing check valve 130 is more flexible and various so as to adapt to different working conditions and use requirements, and the processing flexibility of staff is also improved.

In this embodiment, the second branch pipe 43 and the second pipe 80 are provided with a check valve 130 to further improve the operation stability of the air supply system.

As shown in fig. 1, the present application also provides an engine system including an air supply system, which is the air supply system described above, and an engine 10.

Embodiment two: the difference between the air supply system in the second embodiment and the first embodiment is that: the structure of the gas using device is different.

As shown in fig. 2, the gas-using apparatus is an engine 10, a second end of the second pipe 80 communicates with the second intake port 11, and at least part of the fuel gas in the pressure release chamber flows back into the engine 10 through the second pipe 80. In this way, the fuel gas stored in the pressure release cavity can directly flow back to the engine 10 to supply the engine 10 to run, so that the air supply system is more environment-friendly. Meanwhile, the structure of the gas utilization equipment is more flexible and various due to the arrangement, so that different working conditions and use requirements are met, and the processing flexibility of staff is improved.

As shown in fig. 2, the air supply system further includes a second pressure detecting device 110, where the second pressure detecting device 110 is disposed on the second pipeline 80 and located between the pressure relief device 20 and the third control valve 90, and the second pressure detecting device 110 is used for detecting a pressure value of the fuel gas in the second pipeline 80. The second pressure detecting device 110 is electrically connected to a control module, and the control module controls the third control valve 90 to be opened or closed according to a detection value of the second pressure detecting device 110 when the engine 10 is started. In this way, by providing the second pressure detecting device 110, it is possible to ensure that the opening or closing timing of the third control valve 90 is appropriate, so as to ensure that the function of the air supply system can be matched to the operating state of the engine 10 when switching. Meanwhile, the automatic opening or closing of the third control valve 90 is realized through the control module, so that the automatic operation of the air supply system is realized, and the operation difficulty of staff is further reduced.

In this embodiment, if the detection value of the second pressure detecting device 110 does not reach the standard, the pressure value in the pressure release chamber is smaller, if the pressure value is communicated with the engine 10, the fuel gas of the engine 10 is easy to flow out, the operation stability of the engine 10 is affected, and only after the detection value of the second pressure detecting device 110 reaches the standard, the control module controls the third control valve 90 to be opened, so as to ensure that the fuel gas in the pressure release chamber can stably flow into the engine 10, and further improve the operation stability of the air supply system.

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

The gas supply system is used for conveying gas into the engine, the gas supply device of the gas supply system is provided with a first gas outlet, the first pipeline comprises a main pipeline, a first branch pipeline and a second branch pipeline, the first branch pipeline and the second branch pipeline are communicated with the main pipeline, the first control valve is arranged on the main pipeline and used for controlling the on-off state of the main pipeline, the second control valve is arranged on the second branch pipeline and used for controlling the on-off state of the second branch pipeline, and the pressure relief device is provided with a pressure relief cavity and a first gas inlet communicated with the pressure relief cavity. The first air outlet is communicated with the second air inlet of the engine through a main pipeline and a first branch pipeline, the first air outlet is communicated with the first air inlet through the main pipeline and a second branch pipeline, when the first control valve is closed and the second control valve is opened, at least part of fuel gas in the main pipeline and fuel gas in the second branch pipeline flow into the pressure relief cavity, and the pressure relief device is used for containing the fuel gas so as to relieve the pressure of the part of main pipeline and the second branch pipeline, and when the first control valve is opened and the second control valve is closed, the air supply device is used for conveying the fuel gas into the engine. Thus, when the engine is running, the first control valve is opened, the second control valve is closed, the air supply device can normally supply fuel gas to the engine so as to ensure that the engine can normally run, and when the engine is stopped, the first control valve is closed, the second control valve is opened, on one hand, the communication between the air supply device and the engine is cut off so as to ensure that the air supply device stops supplying fuel gas to the engine; on the other hand, partial high-pressure fuel gas in the first pipeline can flow into the accommodating cavity of the pressure relief device, so that partial first pipeline is timely relieved, the safety problem of a user caused by leakage of the fuel gas in the first pipeline is avoided, and the problem that the operation safety of a hydrogen internal combustion engine system in the prior art is lower is solved. Simultaneously, pressure release device can store the gas to retrieve, recycle the gas, and then make gas supply system more green, environmental protection.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An air supply system for delivering fuel gas into an engine (10), the air supply system comprising:

A gas supply device (30) having a first gas outlet (31);

The first pipeline (40) comprises a main pipeline (41), a first branch pipeline (42) and a second branch pipeline (43), wherein the first branch pipeline (42) and the second branch pipeline (43) are communicated with the main pipeline (41);

A first control valve (50), wherein the first control valve (50) is arranged on the main pipeline (41) and is used for controlling the on-off state of the main pipeline (41);

A second control valve (60), wherein the second control valve (60) is arranged on the second branch pipeline (43) and is used for controlling the on-off state of the second branch pipeline (43);

A pressure relief device (20), the pressure relief device (20) having a pressure relief cavity and a first air inlet (21) in communication with the pressure relief cavity;

Wherein the first air outlet (31) is communicated with a second air inlet (11) of the engine (10) through the main pipeline (41) and the first branch pipeline (42), the first air outlet (31) is communicated with the first air inlet (21) through the main pipeline (41) and the second branch pipeline (43), and when the first control valve (50) is closed and the second control valve (60) is opened, at least part of fuel gas in the main pipeline (41) and fuel gas in the second branch pipeline (43) flow into the pressure relief cavity, and the pressure relief device (20) is used for relieving the pressure of the part of the main pipeline (41) and the second branch pipeline (43) by accommodating the fuel gas; when the first control valve (50) is opened and the second control valve is closed, the gas supply device (30) supplies fuel gas into the engine (10).

2. The air supply system according to claim 1, characterized in that a first end of the main conduit (41) communicates with the first air outlet (31), a first end of the first branch conduit (42) communicates with a second end of the main conduit (41), a second end of the first branch conduit (42) communicates with the second air inlet (11), a first end of the second branch conduit (43) communicates with a second end of the main conduit (41), and a second end of the second branch conduit (43) communicates with the first air inlet (21).

3. The air supply system of claim 1, further comprising:

A first pressure detection device (70) disposed on the first branch pipe (42), the first pressure detection device (70) being configured to detect a gas pressure value in the first branch pipe (42);

the timing module is electrically connected with the engine (10) and is used for timing the stop time of the engine (10);

The control module is connected with the engine (10), the timing module, the first control valve (50), the second control valve (60) and the first pressure detection device (70);

Wherein, when the engine (10) is started, the control module controls the first control valve (50) to be opened and the second control valve (60) to be closed; when the engine (10) is stopped, the control module controls the timing module to start timing, and when the timing value of the timing module reaches a first preset value, the control module controls the first control valve (50) to be closed, and controls the second control valve (60) to be opened or closed according to the detection value of the first pressure detection device (70).

4. A gas supply system according to claim 3, characterized in that the pressure relief device (20) further has a second gas outlet (22) communicating with the pressure relief chamber, the gas supply system further comprising:

A second pipeline (80), wherein a first end of the second pipeline (80) is communicated with the second air outlet (22), and a second end of the second pipeline (80) is communicated with air utilization equipment;

A third control valve (90), wherein the third control valve (90) is arranged on the second pipeline (80) and is used for controlling the on-off state of the second pipeline (80);

When the third control valve (90) is opened, at least part of the fuel gas in the pressure release cavity flows into the gas utilization equipment.

5. The air supply system of claim 4, further comprising:

The burner (100), the gas consumption equipment is the burner (100), the burner (100) has a third air inlet (101), the second end of the second pipeline (80) is communicated with the third air inlet (101), and the burner (100) heats the cooling liquid of the engine (10) by heating the cooling liquid pipeline of the engine (10).

6. The air supply system of claim 5, further comprising:

A second pressure detection device (110), wherein the second pressure detection device (110) is arranged on the second pipeline (80) and is positioned between the pressure relief device (20) and the third control valve (90), and the second pressure detection device (110) is used for detecting the gas pressure value in the second pipeline (80);

The temperature detection device is arranged on the cooling liquid pipeline and is used for detecting the temperature value of cooling liquid in the cooling liquid pipeline;

The third control valve (90), the second pressure detection device (110) and the temperature detection device are all connected with the control module, and when the engine (10) is started, if the detection value of the second pressure detection device (110) reaches a second preset value and the detection value of the temperature detection device reaches a third preset value, the control module controls the third control valve (90) to be opened; the control module controls the third control valve (90) to close when the engine (10) is stopped.

7. The gas supply system according to claim 4, characterized in that the gas consuming device is the engine (10), the second end of the second conduit (80) is in communication with the second gas inlet (11), and at least part of the gas in the pressure relief chamber is returned to the engine (10) via the second conduit (80).

8. The air supply system of claim 7, further comprising:

A second pressure detection device (110), wherein the second pressure detection device (110) is arranged on the second pipeline (80) and is positioned between the pressure relief device (20) and the third control valve (90), and the second pressure detection device (110) is used for detecting the gas pressure value in the second pipeline (80);

The second pressure detection device (110) is electrically connected with the control module, and the control module controls the third control valve (90) to be opened or closed according to the detection value of the second pressure detection device (110) when the engine (10) is started.

9. The air supply system of claim 2, further comprising:

-a non-return valve (130), said non-return valve (130) being arranged on said second branch line (43) and/or on said second line (80).

10. An engine system, characterized in that the engine system comprises an air supply system and an engine, the air supply system being the air supply system according to any one of claims 1 to 9.