Low-pressure large-flow hydrogen ejector and internal combustion engine

Abstract

The invention relates to the technical field of hydrogen internal combustion engines, in particular to a low-pressure large-flow hydrogen ejector and an internal combustion engine. Comprising a container body and a valve seat which are connected with each other and define a containing cavity. The valve seat is provided with an air outlet; a static iron core, an armature and a valve element are sequentially arranged in the containing cavity in the hydrogen flowing direction. The armature is fixedly connected with the valve element, a pressure spring is arranged in the static iron core, and the outer end of the pressure spring abuts against the armature; hydrogen runners are respectively arranged on the static iron core, the armature and the valve core; when the electromagnet is powered on, attraction force is generated between the static iron core and the armature, and the valve element and the valve seat are disconnected. During power failure, the armature is pushed away from the static iron core by the pressure spring, so that the valve core is attached to the valve seat; the annular surfaces, used for sealing the hydrogen flow channel, of the valve element and the valve seat are both planes, and sealing rings are arranged on the annular surfaces. The hydrogen injector is good in sealing effect, high in flow under low pressure and capable of meeting the injection requirement of constant pressure, timing and quantification.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen internal combustion engines, in particular to a low-pressure large-flow hydrogen injector and an internal combustion engine. BACKGROUND

[0002] Compared with other fuel internal combustion engines, hydrogen internal combustion engines have the absolute advantage of zero carbon emissions.

[0003] There are currently two fuel supply modes for hydrogen internal combustion engines, namely intake port injection and in-cylinder direct injection. Among them, the hydrogen and air are pre-mixed in the intake port injection mode, so the quality of the mixture is high, and the engine cylinder head is changed little, which is convenient for improvement on the basis of existing gasoline engines. The existing intake port injectors of hydrogen internal combustion engines are not mature, and most of them directly use the injectors of gasoline engines or natural gas engines, or use them after slight modification.

[0004] Due to the change of injection medium, the existing intake port injectors of hydrogen internal combustion engines have the problems of low hydrogen flow and uncontrollable injection quality, which may lead to poor quality of the mixture, and further lead to problems such as early combustion, knocking and backfiring of hydrogen internal combustion engines, affecting the service life of the injector.

[0005] In addition, hydrogen has the characteristics of low molecular weight, inability to lubricate mechanical structures, and easy hydrogen embrittlement of materials. If the structure of a gasoline injector or a diesel injector is directly used, there are certain problems in sealing, lubrication and reliability. SUMMARY

[0006] The present application provides a low-pressure large-flow hydrogen injector and an internal combustion engine. The hydrogen injector has good sealing effect, high flow at low pressure, and can meet the requirements of constant pressure, constant timing and constant quantity injection.

[0007] In a first aspect, the low-pressure large-flow hydrogen injector provided by the present application comprises a body and a valve seat connected to each other and surrounding a containing cavity; the body has an air inlet, and the valve seat has an air outlet; further comprising, A static core, an armature and a valve core are sequentially arranged in the containing cavity along the hydrogen flow direction; the armature is fixedly connected with the valve core, a compression spring is arranged in the static core, and the outer end of the compression spring abuts against the armature; hydrogen flow channels are respectively arranged on the static core, the armature and the valve core; An electromagnet can generate an attractive force between the static core and the armature when energized, so as to disconnect the valve core from the valve seat, thereby opening the hydrogen flow channel between the air inlet and the air outlet; when the electromagnet is de-energized, the compression spring pushes the armature away from the static core, so as to make the valve core adhere to the valve seat, thereby closing the hydrogen flow channel; At the position close to the outlet, the annular surface of the valve core and the valve seat for closing the hydrogen flow channel are both flat, and a sealing ring is arranged at the annular surface.

[0008] In the preferred embodiment, a plurality of first through holes are arranged on the static core along the axial direction, and a plurality of second through holes corresponding to the first through holes are arranged on the armature.

[0009] In the preferred embodiment, the lower end of the first through hole and / or the upper end of the second through hole is provided with an annular groove; the horizontal dimension of the annular groove can cover the first through hole and the second through hole at the same time.

[0010] In the preferred embodiment, the longitudinal section of the valve core is in the shape of a mountain; the inner wall of the valve seat is provided with an annular table extending to the center; The central axis of the valve core is connected with the armature through a bolt; The annular side wall of the valve core is provided with a third through hole; the annular side wall of the valve core and the inner side wall of the valve seat form a gas channel therebetween; The lower surface of the valve core is flat, the upper surface of the annular table is flat, and the area opposite to the lower surface of the valve core and the upper surface of the annular table forms the annular surface; when the lower surface of the valve core is separated from or attached to the upper surface of the annular table, the flow channel between the inlet and the outlet is opened or closed.

[0011] In the preferred embodiment, the upper surface of the annular table is provided with a receiving groove, and the sealing ring is arranged in the receiving groove; the side of the receiving groove facing the central axis of the valve seat is raised to form a boss; when the sealing ring is in a natural state, the upper surface of the boss is lower than the upper surface of the sealing ring; or, The lower surface of the valve core is provided with a receiving groove, and the sealing ring is arranged in the receiving groove; the side of the receiving groove close to the inner side wall of the valve seat is raised to form a boss; when the sealing ring is in a natural state, the lower surface of the boss is higher than the lower surface of the sealing ring.

[0012] In the preferred embodiment, the upper edge of the annular side wall of the valve core extends outward to form an eave, thereby closing the upper end of the gas channel between the annular side wall of the valve core and the inner side wall of the valve seat.

[0013] In the preferred embodiment, an annular gasket is arranged between the body and the valve seat, and the gasket separates the armature and the valve core.

[0014] In the preferred embodiment, the electromagnet is arranged outside the body and surrounds the static core and the armature.

[0015] In a preferred embodiment, the low-pressure high-flow hydrogen injector further comprises a cap, which is connected to the body in interference fit, and presses the valve seat to the body.

[0016] In a second aspect, the application further provides an internal combustion engine comprising any of the hydrogen injectors.

[0017] The application has the following advantages: The hydrogen injector is installed in the intake passage of a hydrogen internal combustion engine, and has a working pressure in the range of 1 bar to 20 bar, and is a low-pressure injector.

[0018] Since the annular surfaces of the valve core and the valve seat for mutual contact to close the flow passage are both planar structures, and a sealing ring is used for sealing, the flow area perpendicular to the axial flow passage and the axial flow passage are both increased, and the diameter of the hole in the valve seat is also larger, so the flow is larger. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0020] Figure 1 is a structural schematic diagram of the hydrogen injector provided by the embodiments of the application; Figure 2 is a longitudinal sectional view of the static iron core; Figure 3 is a top view of the static iron core; Figure 4 is a flow schematic diagram of the planar valve structure; Figure 5 is Figure 4 is an enlarged view of region A; Figure 6 is a flow schematic diagram of a traditional cone valve; Figure 7 is Figure 6 is an enlarged view of region B; Reference numerals in the drawings: 1 - body; 2 - static iron core; 201 - spring accommodating cavity; 202 - first through hole; 203 - annular groove; 3 - armature; 4 - valve core; 5 - valve seat; 6 - cap; 7 - electromagnet; 8 - sealing ring; 9 - gasket; 10 - bolt; 11 - compression spring. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and labeled in the accompanying drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work fall within the scope of protection of the present application.

[0023] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The following will describe in detail some embodiments of the present invention in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] As Figures 1-3 shown, this embodiment provides a low-pressure large-flow hydrogen injector, which includes a body 1 and a valve seat 5 that are connected to each other and enclose to form a receiving cavity; taking the direction in the figure as an example, the upper end of the body 1 has an air inlet, and the lower end of the valve seat 5 has an air outlet; it also includes a tightening cap 6, and the tightening cap 6 is connected to the body 1 by interference fit, and can press the valve seat 5 against the body 1.

[0029] It also includes: a stationary iron core 2, an armature 3 and a valve core 4 that are sequentially arranged in the receiving cavity along the hydrogen flow direction; the stationary iron core 2 is fixed to the body 1 by interference fit to form a fixed part, and the armature 3 and the valve core 4 are fixedly connected to form a moving part. A spring receiving cavity 201 is provided at the center of the stationary iron core 2, and a compression spring 11 is arranged therein, and its lower end abuts against the armature 3, and always provides a force for the armature 3 to move away from the armature 3.

[0030] In this embodiment, the armature 3 and the valve core 4 are connected by a bolt 10. In other feasible embodiments, the armature 3 and the valve core 4 can also be connected by interference fit, or the armature 3 and the valve core 4 are respectively processed with internal and external threads to achieve connection.

[0031] An annular gasket 9 is arranged between the body 1 and the valve seat 5, and the gasket 9 separates the armature 3 and the valve core 4. The body 1, the stationary iron core 2, the armature 3, the gasket 9 and the valve core 4 enclose to form the main chamber of the hydrogen injector, that is, the first chamber, and the air inlet is communicated with the first chamber; the valve core 4, the valve seat 5 and the sealing ring 8 enclose to form the second chamber, and the air outlet is communicated with the second chamber.

[0032] A plurality of first through holes 202 are arranged on the stationary iron core 2 along the axial direction, and a plurality of second through holes (not shown in the figure) corresponding to the first through holes 202 are arranged on the armature 3.

[0033] The longitudinal section of the valve core 4 is "mountain" shaped; a third through hole (not shown in the figure) is arranged on the annular side wall of the valve core 4; an axial air passage is formed between the annular side wall of the valve core 4 and the inner side wall of the valve seat 6.

[0034] The lower surface of the valve core 4 is a plane; a ring platform extending towards the center is arranged in the middle of the inner wall of the valve seat 5, the upper surface of the ring platform is a plane, and the area where the lower surface of the valve core 4 is opposite to the upper surface of the ring platform forms an annular surface, and a radial air passage is formed between the valve core 4 and the ring platform of the valve seat 5.

[0035] The inlet, the first through hole, the second through hole, the third through hole, the axial air passage, the radial air passage and the outlet form a complete hydrogen flow channel. When the lower surface of the valve core 4 is separated from or attached to the upper surface of the ring table of the valve seat 5, the flow channel between the inlet and the outlet is opened or closed.

[0036] The electromagnet 7 is arranged outside the body 1 and surrounds the static core 2 and the armature 3. The electromagnet 7 is connected to an external controller through a cable. When the electromagnet 7 is powered on, an attractive force is generated between the static core 2 and the armature 3, which causes the valve core 4 to separate from the valve seat 5, thereby opening the hydrogen flow channel between the inlet and the outlet. When the electromagnet 7 is powered off, the compression spring pushes the armature 3 away from the static core 2, causing the valve core 4 to attach to the valve seat 5, thereby closing the hydrogen flow channel.

[0037] In other embodiments, the electromagnet 7 can only surround the static core 2 or the armature 3, and can move the armature 3 towards the static core 2 when powered on.

[0038] To improve the sealing effect between the valve core 4 and the valve seat 5, the upper surface of the ring table of the valve seat 5 is provided with a receiving groove, and a sealing ring 8 made of a non-metal material and having elasticity is arranged in the receiving groove. When the valve core 4 moves towards the valve seat 5, the lower surface of the valve core 4 contacts and compresses the sealing ring 8, thereby closing the radial air passage between the valve core 4 and the ring table of the valve seat 5.

[0039] In other embodiments, the sealing ring 8 can also be arranged on the lower surface of the valve core 4. The sealing ring 8 can be in the form of a separate component or can be integrally formed with the valve core 4 or the valve seat 5.

[0040] In use, hydrogen enters the first chamber through the inlet, and then flows through the first through hole 202 of the static core 2, the second through hole of the armature 3, the central hole of the gasket 9 and the third through hole of the valve core 4 into the second chamber.

[0041] When the electromagnet 7 is not powered on, the moving part is subjected to the downward pre-tightening force of the compression spring 11, the lower surface of the valve core 4 contacts the sealing ring 8, and the upper surface of the annular side wall of the valve core 4 does not contact the gasket 9. The sealing ring 8 is squeezed and deformed under force, and the radial air passage between the second chamber and the outlet is closed.

[0042] When the electromagnet 7 is powered on, the static core 2 and the armature 3 attract each other, the armature 3 is subjected to an upward attractive force, which overcomes the pressure of the compression spring 11 and the gas pressure, causing the moving part to move upward until the valve core 4 contacts the gasket 9. The valve core 4 no longer contacts the sealing ring 8, the radial passage between the second chamber and the outlet is opened, and hydrogen can flow out of the outlet.

[0043] In addition, when the hydrogen gas is in the first chamber, the hydrogen gas flow from the first through hole 202 of the static core 2 to the second through hole of the armature 3 can be blocked due to the misalignment of the first through hole 202 and the second through hole, thereby hindering the flow or reducing the flow. Therefore, in the preferred embodiment, the lower end of the first through hole 202 is provided with an annular groove 203, and the horizontal size of the annular groove 203 can cover the first through hole 202 and the second through hole at the same time. When the hydrogen gas flows through the static core 2, the hydrogen gas flows from the first through hole 202 into the annular groove 203, and then flows from the annular groove into the second through hole.

[0044] In other embodiments, the annular groove can also be provided at the upper end of the second through hole, and the principle and working process remain unchanged.

[0045] The planar valve of the present embodiment is shown in Figure 4 and Figure 5 The lower surface of the valve core 4 is a planar structure, the upper surface of the annular table of the valve seat 5 is also a planar structure, the maximum distance between the two is d1, the flow area is S1, and the diameter of the center hole of the valve seat 5 is D1. The traditional conical valve is shown in Figure 6 and Figure 7 The inner wall of the valve seat forms a conical surface, and the valve core also adopts a conical surface structure to cooperate with the valve seat. The maximum distance between the valve core and the valve seat is d2, the flow area is S2, and the diameter of the center hole of the valve seat is D2.

[0046] From the comparison of the two structures, it can be seen that in the case of no lubrication, the conical valve needs to increase the length of the sealing ring to increase the service life, so that D2 is smaller, which affects the flow. However, the planar valve combined with soft sealing adopted in the present application has a very short sealing ring length, so that D1>D2. From the perspective of lateral flow area, under the same lift, since the conical valve has an angle, d2

[0047] Combining the two, the structure of the present embodiment increases the flow area of the vertical axial flow channel and the axial flow channel compared with the existing conical valve, so the flow is larger.

[0048] From the start of energization to the end of energization of the electromagnet 7, one hydrogen gas injection action is performed. According to the needs of the hydrogen internal combustion engine, the hydrogen injector needs to perform multiple injections within one second. If a four-stroke four-cylinder internal combustion engine is calculated, when the rotation speed is 3000 revolutions per minute, the hydrogen injector needs to inject about 25 times in one second. At the same time, the mating surfaces of the valve core 4 and the valve seat 5 and the armature 3 and the body 1 in the present hydrogen injector are not lubricated by oil or grease.

[0049] Therefore, in the present embodiment, the hydrogen injector is further improved and designed as follows for severe working conditions: Since the static core 2 and the armature 3 are made of electromagnetic pure iron, the hardness is low, and in the case that no lubricating oil or grease forms an oil film to isolate the two, the collision between the two will cause large deformation, making the movement distance of the moving part uncontrollable, the electromagnetic force uncontrollable, and further affecting the consistency and accuracy of the hydrogen injector. Therefore, the valve core 4, the valve seat 5 and the gasket 9 are made of high-hardness iron alloy after heat treatment, which can withstand high-frequency friction and impact, and the selected material has hydrogen embrittlement resistance under the working conditions of the hydrogen injector. The material can be: quenched and tempered bearing steel, high-speed steel, martensitic stainless steel after solid solution and aging treatment, and precipitation hardening stainless steel after solid solution and aging + quenching and tempering. At low temperature (below 100 degrees Celsius), even at high frequency, the hydrogen embrittlement phenomenon of the above-mentioned materials is not significant. The working environment of the intake port injector is usually <90 degrees Celsius, mainly 40-50 degrees Celsius, so the above-mentioned materials have hydrogen embrittlement resistance.

[0050] When the electromagnet is energized, the gasket 9 will limit the upward movement of the valve core 4 of the moving part, ensuring that the armature 3 of the moving part and the static core 2 of the fixed part will not contact, and the distance maintained can both guarantee to meet the electromagnetic force requirement of the moving part upward, and can also guarantee that the armature 3 and the static core 2 will not contact after the valve core 4 and the gasket 9 are deformed after multiple impacts.

[0051] Similarly, in the case that lubricating oil or grease forms an oil film to isolate the two, if the valve core 4 directly collides with the valve seat 5, plastic deformation will occur, causing the sealing surface to fail, and further affecting the sealing performance of the hydrogen injector. Therefore, the sealing ring 8 is made of non-metal such as rubber or plastic, which has elasticity and wear resistance. The sealing ring has a buffering effect, and the sealing by the elastic deformation of the non-metal can avoid the failure of the sealing surface. The sealing ring 8, the valve core 4 and the valve seat 5 are in surface contact, and the contact surface is a circular ring, which increases the contact area and reduces the internal stress of the material.

[0052] However, the large deformation of the non-metal after being stressed may also lead to uncontrollable deformation and stress, and excessive deformation or high stress may cause the non-metal to be damaged. Therefore, in the preferred embodiment, the side of the center axis of the containing groove facing the valve seat 5 is raised to form a boss; when the sealing ring 8 is in a natural state, the boss is lower than the upper surface of the sealing ring 8, and the height difference is preferably 0.1-0.5mm. When the valve core 4 extrudes the sealing ring 8 and deforms it, the boss will contact the valve core 4, limiting the maximum deformation of the sealing ring 8, and further limiting the maximum stress of the sealing ring 8, to avoid excessive stress or excessive deformation of the sealing ring 8 and failure. At the same time, since the sealing ring 8 has a buffering effect, the force on the boss is small, and the plastic deformation of the boss is also small during long-term use, which can ensure the consistency of the hydrogen injector within the service life of the hydrogen injector.

[0053] Similarly, if the sealing ring 8 is arranged on the lower surface of the valve core 4, the boss is also arranged on the lower surface of the valve core 4, and the same technical effects as the foregoing embodiment can be achieved. Alternatively, the boss and the sealing ring 8 are integrally formed, which is more convenient in installation and use.

[0054] In the preferred embodiment, the upper edge of the annular side wall of the valve core 4 extends outward to form an eave, so as to close the upper end of the air passage between the annular side wall of the valve core 4 and the inner side wall of the valve seat 5, which can avoid the backflow of the gas in the second chamber to the first chamber and increase the contact area of the valve core 4 and the gasket 9 to disperse the impact force.

[0055] The embodiment has the advantage of large flow rate: The use of the planar valve core 4 and the valve seat 5 increases the flow area at the valve core 4 and the valve seat 5 relative to the conical sealing mode, and improves the flow rate; The annular groove 203 is arranged at the lower part of the static core 2 to make the flow passage more smooth, and avoid the throttling phenomenon caused by the misalignment of the through hole of the static core 2 and the through hole of the armature 3, thereby ensuring the large flow rate; The embodiment has the advantage of high reliability: The use of the gasket 9 to limit the movement of the moving part avoids the collision between the armature 3 with low hardness and the static core 2, avoids the damage of the key components, improves the controllability of the electromagnetic force, and thereby improves the reliability; The non-metallic sealing ring 8 is arranged between the valve core 4 and the valve seat 5 to avoid the plastic deformation caused by the collision between the valve core 4 and the valve seat 5, thereby improving the reliability of the sealing; The face sealing of the valve core 4 and the valve seat 5 increases the contact area and reduces the stress on the material, and the deformation of the sealing ring 8 is limited to avoid the failure of the sealing ring 8.

[0056] The embodiment also has the advantage of good sealing: The non-metallic sealing ring 8 arranged between the valve core 4 and the valve seat 5 changes the hard sealing to soft sealing, reduces the leakage of the hard sealing in the hydrogen injector due to the lack of oil film in the hydrogen environment, and reduces the leakage caused by the damage of the metal due to the lack of lubrication.

[0057] The embodiment also provides an internal combustion engine comprising the hydrogen injector. Since the hydrogen injector is used, all the technical effects thereof are achieved, which will not be described herein.

[0058] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low pressure high flow hydrogen injector characterized by, The hydrogen gas injector comprises a body and a valve seat which are connected to each other and form a containing cavity; the body has a gas inlet, and the valve seat has a gas outlet; further comprising The hydrogen gas injector comprises a body and a valve seat which are connected to each other and form a containing cavity; the body has a gas inlet, and the valve seat has a gas outlet; further comprising A static iron core, an armature and a valve core are sequentially arranged in the containing cavity along the hydrogen flow direction; the armature is fixedly connected with the valve core, a compression spring is arranged in the static iron core, and the outer end of the compression spring abuts against the armature; the static iron core, the armature and the valve core are respectively provided with hydrogen flow channels; An electromagnet is capable of generating an attractive force between the static iron core and the armature when energized, so as to separate the valve core from the valve seat, thereby opening the hydrogen flow channel between the gas inlet and the gas outlet; when de-energized, the compression spring pushes the armature away from the static iron core, so as to make the valve core abut against the valve seat, thereby closing the hydrogen flow channel; At a position close to the gas outlet, the annular surfaces of the valve core and the valve seat for closing the hydrogen flow channel are both flat, and a sealing ring is arranged at the annular surfaces.

2. The low pressure high flow hydrogen injector of claim 1, wherein, A plurality of first through holes are arranged on the static iron core along the axial direction, and a plurality of second through holes corresponding to the first through holes are arranged on the armature.

3. The low pressure high flow hydrogen injector of claim 2, wherein, The lower end of the first through hole and / or the upper end of the second through hole is provided with an annular groove; the horizontal dimension of the annular groove can simultaneously cover the first through hole and the second through hole.

4. The low pressure high flow hydrogen injector of claim 1, wherein, The longitudinal section of the valve core is in the shape of a mountain; a ring-shaped platform extending towards the center is arranged in the middle of the inner wall of the valve seat; The central axis of the valve core is fixedly connected with the armature; A third through hole is arranged on the annular side wall of the valve core; the annular side wall of the valve core and the inner side wall of the valve seat form a gas channel therebetween; The lower surface of the valve core is flat, the upper surface of the ring-shaped platform is flat, and the area opposite to the lower surface of the valve core and the upper surface of the ring-shaped platform forms the annular surface; when the lower surface of the valve core is separated from the upper surface of the ring-shaped platform, the flow channel between the gas inlet and the gas outlet is opened; when the lower surface of the valve core abuts against the upper surface of the ring-shaped platform, the flow channel between the gas inlet and the gas outlet is closed.

5. The low pressure high flow hydrogen injector of claim 4, wherein, The upper surface of the ring-shaped platform is provided with a containing groove, and the sealing ring is arranged in the containing groove; the side of the containing groove close to the central axis of the valve seat is raised to form a convex platform; when the sealing ring is in a natural state, the upper surface of the convex platform is lower than the upper surface of the sealing ring. Alternatively, The lower surface of the valve core is provided with a containing groove, and the sealing ring is arranged in the containing groove; the side of the containing groove close to the inner side wall of the valve seat is raised to form a convex platform; when the sealing ring is in a natural state, the lower surface of the convex platform is higher than the lower surface of the sealing ring.

6. The low pressure high flow hydrogen injector of claim 4, wherein, The upper edge of the annular side wall of the valve core extends outward to form a convex eave, thereby closing the upper end of the gas channel between the annular side wall of the valve core and the inner side wall of the valve seat.

7. The low pressure high flow hydrogen injector of claim 1, wherein, An annular gasket is arranged between the body and the valve seat, and the gasket separates the armature and the valve core.

8. The low pressure high flow hydrogen injector of claim 1, wherein, The electromagnet is arranged outside the body and surrounds the static iron core and the armature.

9. The low pressure high flow hydrogen injector of claim 1, wherein, A cap is further arranged, and the cap is connected with the body in an interference fit, and the valve seat is pressed against the body.

10. An internal combustion engine characterized by comprising: The hydrogen gas injector comprises the body and the valve seat of any one of claims 1-9.

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