Hydrogen ejector and combustion system of internal combustion engine

Abstract

The invention relates to the field of internal combustion engines, and provides a hydrogen ejector and an internal combustion engine combustion system. The lengthened spraying pipe is arranged at the end, close to the first hydrogen spraying opening, of the hydrogen spraying device body, extends in the axial direction of the hydrogen spraying device body and is provided with a second hydrogen spraying opening; the heat insulation pin is arranged in the lengthened spraying pipe and located between the first hydrogen spraying opening and the second hydrogen spraying opening, the heat insulation pin is provided with a through hole formed in the axial direction of the heat insulation pin, one end of the through hole communicates with the first hydrogen spraying opening, and the other end of the through hole communicates with the second hydrogen spraying opening. In this way, an existing hydrogen ejector can be improved, and the manufacturing and design cost is greatly reduced. Meanwhile, the lengthened spraying pipe is utilized, the spraying opening of the hydrogen ejector body can be far away from a high-temperature and high-pressure area, the thermal load problem and the installation problem of the hydrogen ejector are effectively solved, the service life of the hydrogen ejector is prolonged, and efficient, reliable and stable operation of an engine can be achieved easily.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and in particular to a hydrogen injector and an internal combustion engine combustion system. Background Art

[0002] As an internal combustion engine fuel, hydrogen has a series of unique advantages that make it a potential alternative energy source for future clean energy vehicles. First, the main product of hydrogen's complete combustion is water vapor, and no carbon dioxide and other greenhouse gases are produced, so it can significantly reduce the impact on the environment and help mitigate climate change. Although hydrogen combustion may produce a certain amount of nitrogen oxides (NOx), nitrogen oxide emissions can be minimized by optimizing engine design and using appropriate emission control technologies. Secondly, the mass energy density of hydrogen is very high, about 120 to 142 MJ / kg, which is significantly higher than the mass energy density of traditional gasoline and diesel. This means that under the same weight conditions, hydrogen can provide more energy. Furthermore, hydrogen burns quickly and can burn in a wider range of air-fuel ratios, thereby optimizing engine performance and improving fuel economy. In general, hydrogen has certain advantages as an internal combustion engine fuel and is suitable as part of the future clean energy solution.

[0003] Using direct injection of hydrogen in the cylinder can increase the intake volume during the intake process and improve the engine's charging efficiency, that is, avoid the injection of hydrogen in the intake duct to occupy the volume of air and increase the engine power; in addition, the injection strategy of direct injection can be adjusted to form two modes of stratified combustion and homogeneous combustion to achieve the best combustion effect. This can achieve better combustion control, help improve engine efficiency and reduce emissions, which requires the use of hydrogen direct injection injectors. However, as a key component of the internal combustion engine, although hydrogen direct injection injectors have made significant technological progress, there are still some shortcomings. Hydrogen direct injection injectors work in high temperature and high pressure environments for a long time, and long-term use may cause wear, corrosion or other failures. The durability and reliability of hydrogen direct injection injectors need to be further improved to meet the automotive industry's requirements for long life and low maintenance costs.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a hydrogen injector and an internal combustion engine combustion system to solve the defects and shortcomings in the prior art.

[0006] In order to achieve the above object, the present invention provides a hydrogen injector, comprising: A hydrogen injector body, wherein the hydrogen injector body is provided with a first hydrogen injection port; an extended nozzle, arranged at one end of the hydrogen injector body close to the first hydrogen injection port, the extended nozzle extending along the axial direction of the hydrogen injector body, and the end of the extended nozzle away from the hydrogen injector body is provided with a second hydrogen injection port; An insulating pin is arranged in the extended nozzle, and the insulating pin is located between the first hydrogen injection port and the second hydrogen injection port. The insulating pin is provided with a through hole arranged along its axial direction, and one end of the through hole is connected to the first hydrogen injection port, and the other end is connected to the second hydrogen injection port.

[0007] According to the hydrogen injector provided by the present invention, one end of the extended nozzle is provided with an opening, and the hydrogen injector body is inserted into the opening; the other end of the extended nozzle is provided with a closed surface, and the second hydrogen injection port is arranged on the closed surface.

[0008] According to the hydrogen injector provided by the present invention, the closed surface is provided with at least one through hole to form the second hydrogen injection port.

[0009] According to the hydrogen injector provided by the present invention, the closed surface is a curved surface, and an arc-shaped protrusion matched with the curved surface is provided at one end of the heat insulation pin close to the closed surface.

[0010] According to the hydrogen injector provided by the present invention, an arc-shaped recessed portion is provided at one end of the heat-insulating pin close to the first hydrogen injection port.

[0011] The hydrogen injector provided according to the present invention further comprises: A wiring harness connector connected to the hydrogen injector body; A control unit is connected to the wiring harness connector via a control signal line, and the control unit is used to control the injection timing and pulse width of the hydrogen injector body.

[0012] The hydrogen injector provided according to the present invention further comprises: A hydrogen pipeline is connected to one end of the hydrogen injector body away from the first hydrogen injection port, and the hydrogen pipeline is used to introduce hydrogen into the interior of the hydrogen injector body.

[0013] The hydrogen injector provided according to the present invention further comprises: The filter is arranged at one end of the hydrogen injector body close to the hydrogen pipeline, and the filter is used to filter the hydrogen entering the hydrogen injector body.

[0014] According to the hydrogen injector provided by the present invention, the hydrogen injection pressure of the hydrogen injector is greater than 2 MPa.

[0015] The present invention also provides an internal combustion engine combustion system, comprising the hydrogen injector as described in any one of the above items.

[0016] The hydrogen injector provided by the present invention comprises: a hydrogen injector body, the hydrogen injector body is provided with a first hydrogen injection port; an extended nozzle, arranged at one end of the hydrogen injector body close to the first hydrogen injection port, the extended nozzle extends along the axial direction of the hydrogen injector body, and the end of the extended nozzle away from the hydrogen injector body is provided with a second hydrogen injection port; a heat-insulating pin, arranged in the extended nozzle, the heat-insulating pin is located between the first hydrogen injection port and the second hydrogen injection port, the heat-insulating pin is provided with a through hole arranged along its axial direction, one end of the through hole is connected to the first hydrogen injection port, and the other end is connected to the second hydrogen injection port. In this way, an extended nozzle can be added on the basis of the existing hydrogen injector, thereby greatly reducing the processing and design costs. By extending the nozzle, the internal injection port of the hydrogen injector body can be kept away from the high temperature and high pressure area, and the heat-insulating pin is installed in the extended nozzle, which can play a role in increasing thermal resistance and achieve a heat-insulating effect, thereby effectively solving the heat load problem, improving the service life of the hydrogen injector, and being conducive to achieving efficient, reliable and stable operation of the engine. In addition, by lengthening the nozzle, the main body of the hydrogen injector can be moved away from the top of the main combustion chamber, solving the installation difficulty problem caused by insufficient space at the top of the main combustion chamber. In addition, by using the hydrogen injector, the remaining unburned hydrogen active radicals in the lengthened nozzle can be ejected during the next injection process, which is beneficial to the combustion stability of the next cycle. The hydrogen injector can be applied to hydrogen engines and ammonia hydrogen engines, etc., and can achieve stable and efficient operation of hydrogen engines, ammonia hydrogen engines, etc., and extend the working life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the hydrogen injector provided by the present invention.

[0019] Reference numerals: 1: wiring harness connector; 2: filter; 3: coil positioning disc; 4: coil seat; 5: coil; 6: hydrogen injector body; 7: needle valve; 8: valve ball; 9: heat insulation pin; 10: extended nozzle; 11: first hydrogen injection port; 12: second hydrogen injection port; 13: through hole; 14: arc-shaped protrusion; 15: arc-shaped depression. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] Please refer to Figure 1 As shown, the embodiment of the present invention provides a hydrogen injector suitable for installation in an internal combustion engine combustion system, comprising a hydrogen injector body 6, a heat insulation pin 9, and an extended nozzle 10. Specifically, as Figure 1As shown, a hydrogen channel is provided inside the hydrogen injector body 6, and a first hydrogen injection port 11 is provided at the lower end thereof to inject hydrogen during the compression stroke. An extended nozzle 10 is provided at one end of the hydrogen injector body 6 close to the first hydrogen injection port 11, and the extended nozzle 10 extends along the axial direction of the hydrogen injector body 6. A second hydrogen injection port 12 is provided at one end of the extended nozzle 10 away from the hydrogen injector body 6. The internal combustion engine combustion system also includes a combustion chamber, which is divided into two parts, including a jet chamber and a main combustion chamber. The jet chamber is provided at the top center of the cylinder head, and a spark plug and an air passage are provided in the jet chamber. A jet hole is provided at the bottom of the jet chamber, and the main combustion chamber is connected to the jet chamber through the jet hole. The extended nozzle 10 is partially inserted into the jet chamber so that the second hydrogen injection port 12 extends into the jet chamber. The heat-insulating pin 9 is arranged in the extended nozzle 10, and the heat-insulating pin 9 is located between the first hydrogen injection port 11 and the second hydrogen injection port 12. The heat-insulating pin 9 can be made of cast iron. The heat-insulating pin 9 is provided with a through hole 13 which is arranged along its axial direction, and one end of the through hole 13 is connected to the first hydrogen injection port 11, and the other end is connected to the second hydrogen injection port 12. It should be noted that the diameter of the through hole 13 can be determined according to actual design requirements. Specifically, for example, the diameter of the through hole 13 is 0.5 to 2 mm. This can meet the processing requirements and facilitate production and manufacturing on the one hand, and ensure that there is a certain thickness between the outer wall of the heat-insulating pin 9 and the hole wall of the through hole 13 on the other hand.

[0025] During operation, in the compression stroke, the hydrogen injector body 6 injects hydrogen from the first hydrogen injection port 11, and injects hydrogen into the jet chamber through the through hole 13 and the second hydrogen injection port 12. Hydrogen ignites and burns in the jet chamber, and forms a high-intensity flame jet stream through the jet hole to enter the main combustion chamber. In the power stroke, a high-temperature and high-pressure environment is formed in the main combustion chamber. Due to the blocking and buffering of the air in the extended nozzle 10 and the heat-insulating pin 9, the temperature and pressure of the nozzle contact area of ​​the hydrogen injector body 6 are lower than the temperature and pressure in the main combustion chamber, which can effectively solve the heat load problem of the hydrogen injector and improve the service life of the hydrogen injector. Moreover, by extending the nozzle 10, the hydrogen injector body 6 is installed on the top of the cylinder head, so that the hydrogen injector body 6 is away from the main combustion chamber, which can avoid the problem of being unable to be installed due to the limited space on the top of the cylinder head. It should be noted that the length and wall thickness of the extended nozzle 10 can be specifically determined according to actual design requirements. For example, the length of the extended nozzle 10 is 30 to 60 mm, within which the installation length is fully considered to avoid interference with other components on the cylinder head. If the extended nozzle 10 is too long or too short, it will have a certain impact on the installation of surrounding components. The wall thickness of the extended nozzle 10 is 0.5 to 2 mm, which can meet the processing requirements and facilitate production and manufacturing, and can avoid the extended nozzle 10 being too thick, which will cause the hole diameter required for insertion on the jet chamber to be too large and be unfavorable for installation.

[0026] With such an arrangement, an extended nozzle 10 can be added to the existing hydrogen injector, thereby greatly reducing the processing and design costs. By extending the nozzle 10, the internal injection port of the hydrogen injector body 6 can be kept away from the high temperature and high pressure area, and the extended nozzle 10 is equipped with a heat insulation pin 9, which can increase the thermal resistance and achieve the effect of heat insulation, thereby effectively solving the heat load problem, improving the service life of the hydrogen injector, and facilitating the efficient, reliable and stable operation of the engine. In addition, by extending the nozzle 10, the hydrogen injector body 6 can be kept away from the top of the main combustion chamber, solving the installation difficulty problem caused by insufficient space at the top of the main combustion chamber. The hydrogen injector can be applied to hydrogen-containing internal combustion engines, such as hydrogen engines and dual-fuel engines such as ammonia hydrogen and hydrogen natural gas, and can achieve stable and efficient operation of the engine and extend the service life of the engine. It should be noted that with Figure 1 As for the placement position of the hydrogen injector shown in the figure, the up and down directions in the figure refer to the axial directions of the up and down positions, the hydrogen injector body 6 and the insulation pin 9.

[0027] In an embodiment of the present invention, an opening is provided at one end of the extended nozzle 10, and the hydrogen injector body 6 is partially inserted into the opening. Specifically, the inner wall of the extended nozzle 10 is tightly fitted with the outer wall of the hydrogen injector body 6 to improve the sealing performance between the two, prevent gas leakage, and ensure reliable operation of the device. A closed surface is provided at the other end of the extended nozzle 10, and the second hydrogen injection port 12 is provided on the closed surface. Specifically, the extended nozzle 10 can be integrally formed, with one end open and a hole opened on the other closed end to form the second hydrogen injection port 12. Such a configuration facilitates the connection between the extended nozzle 10 and the hydrogen injector body 6, making the connection between the two more reliable and convenient for manufacturing and assembly.

[0028] Furthermore, in an embodiment of the present invention, the closed surface is provided with at least one through hole to form a second hydrogen injection port 12. Specifically, the number of through holes can be 1 to 8, and the arrangement is relatively reasonable to meet the injection requirements of hydrogen. The through holes can be evenly arranged on the closed surface to ensure uniform hydrogen ejection, improve the uniform stability of airflow propagation, and thus improve combustion efficiency. The arrangement of the through holes includes but is not limited to a rectangular array or a circular array. In addition, the diameter of the through hole can be 0.5 to 6 mm. Within this range, on the one hand, it can meet the processing requirements and facilitate production and manufacturing. On the other hand, considering the influence of the size of the spray hole on the jet flow, an overly large spray hole will reduce the speed of the jet flow, weaken the jet flow intensity, and make the jet ignition effect worse.

[0029] In an optional embodiment of the present invention, Figure 1As shown, the closed surface is a curved surface, and an arc-shaped protrusion 14 matching the curved surface is provided at one end of the heat-insulating pin 9 close to the closed surface. Specifically, the curvature of the arc-shaped protrusion 14 is smaller than that of the curved surface. Such a configuration can avoid the heat-insulating pin 9 from impacting or colliding with the inner wall of the extended nozzle 10 during the hydrogen injection process, thereby improving the reliability of the hydrogen injector.

[0030] As an optional embodiment of the present invention, an arc-shaped recessed portion 15 is provided at one end of the heat-insulating pin 9 close to the first hydrogen injection port 11. This arrangement can avoid impact and collision between the heat-insulating pin 9 and the end of the hydrogen injector body 6 during hydrogen injection, thereby extending the service life of the hydrogen injector.

[0031] In a specific embodiment of the present invention, the hydrogen injector further includes a wiring harness connector 1 and a control unit. The wiring harness connector 1 is connected to the hydrogen injector body 6, and the control unit is connected to the wiring harness connector 1 via a control signal line. The control unit is used to control the injection timing and pulse width of the hydrogen injector body 6. Specifically, Figure 1 As shown, the wiring harness connector 1 is installed at the upper end of the hydrogen injector body 6. The control unit is an existing mature technology, specifically, for example, an ECU (Electronic Control Unit), so its specific structure and electrical connection relationship are not repeated here. The hydrogen injector is connected to the control signal line through the wiring harness connector 1, and the control signal line is connected to the control unit, so that the injection time and pulse width of the hydrogen injector are controlled by the control unit to meet the combustion control requirements of the internal combustion engine combustion system.

[0032] In an optional embodiment of the present invention, the hydrogen injector further includes a hydrogen pipeline, which is connected to one end of the hydrogen injector body 6 away from the first hydrogen injection port 11, and the hydrogen pipeline is used to introduce hydrogen into the interior of the hydrogen injector body 6. Thus, hydrogen enters the interior of the hydrogen injector through the hydrogen pipeline, and then enters the main combustion chamber for combustion.

[0033] Furthermore, in the embodiment of the present invention, the hydrogen injector further includes a filter 2, which is arranged at one end of the hydrogen injector body 6 close to the hydrogen pipeline, and the filter 2 is used to filter the hydrogen entering the hydrogen injector body 6. In this way, the gas entering the hydrogen injector is filtered to remove impurities therein, which can ensure that the hydrogen entering the injector is clean, avoid the damage of the impurities to the internal structure of the injector, prevent the blockage of the internal channel and the hydrogen injection port, ensure the reliable operation of the hydrogen injector, and also protect other components in the subsequent system, and help to improve the reliability and stability of the entire hydrogen supply system, reduce failures and downtime caused by impurities, and improve the combustion efficiency of hydrogen.

[0034] In a specific embodiment of the present invention, the hydrogen injection pressure of the hydrogen injector is greater than 2MPa to meet the use requirements of the high-pressure injection hydrogen injector. It should be noted that high-pressure injection refers to the direct injection of hydrogen into the main combustion chamber during the compression stroke, and high pressure is relative to the injection pressure of hydrogen in the intake duct. In addition, the high-pressure injection hydrogen injector can make some unburned hydrogen active radicals remain in the extended nozzle 10, and these hydrogen active radicals are ejected during the next injection process, which is conducive to promoting the combustion of the next cycle, and thus conducive to the stable and efficient operation of the engine.

[0035] In summary, the embodiment of the present invention provides a high-pressure hydrogen direct injection injector, including a wiring harness connector 1, a hydrogen pipeline, a filter 2, a hydrogen injector body 6, a heat insulation pin 9, an extended nozzle 10, and an electronic control unit. Figure 1 As shown, a coil positioning disc 3, a coil seat 4, a coil 5, a needle valve 7 and a valve ball 8 are also arranged in the hydrogen injector body 6.

[0036] Specifically, Figure 1 As shown, the wiring harness connector 1 is installed at the upper end of the hydrogen injector body 6, and the electronic control unit ECU is connected to the wiring harness connector 1 through the control signal line. The heat insulation pin 9 is installed in the extended nozzle 10, and the extended nozzle 10 partially extends into the combustion chamber to complete the injection of hydrogen. During operation, the electronic control unit ECU controls the injection angle and injection pulse width of the hydrogen injection, and the hydrogen enters the hydrogen injector body 6 from the filter 2. The coil seat 4 controls the coil 5 to be energized, and the coil 5 drives the needle valve 7 to move upward, and the needle valve 7 drives the valve ball 8 to move upward. Hydrogen is ejected from the first hydrogen injection port 11, through the heat insulation pin 9 and the extended nozzle 10, and ejected from the second hydrogen injection port 12 into the main combustion chamber.

[0037] During the compression stroke, the hydrogen injector injects hydrogen into the main combustion chamber, and during the power stroke, the main combustion chamber forms a high temperature and high pressure environment. Due to the air barrier in the heat insulation pin 9 and the extended nozzle 10, the temperature and pressure in the nozzle contact area of ​​the hydrogen injector are lower than the temperature and pressure in the main combustion chamber, which can effectively solve the heat load problem of the hydrogen injector and increase the service life of the hydrogen injector.

[0038] In the next cycle, since the extended nozzle 10 contains residual hydrogen radicals from the previous cycle, they are sprayed into the main combustion chamber during the next injection process. Based on the existence of these hydrogen radicals, the ignition delay period is reduced, the flame propagation speed is faster, and it is helpful for combustion in the main combustion chamber.

[0039] In short, in this embodiment, the original gas injector can be modified to greatly reduce the manufacturing and design costs. At the same time, the lengthened nozzle 10 is cleverly used to solve the heat load problem and installation problem of the hydrogen injector. In addition, the use of high-pressure airway injection can make some unburned hydrogen active radicals remain in the airway, which is conducive to the combustion stability of the next cycle. The hydrogen injector can be applied to hydrogen engines and ammonia hydrogen engines, etc., and can achieve stable and efficient operation of hydrogen engines, ammonia hydrogen engines, etc., and extend the working life of the engine. It is of great significance to solve the practical application problems of direct injection in the cylinder of hydrogen engines, ammonia hydrogen engines, etc. and solve the current carbon neutrality problem.

[0040] The internal combustion engine combustion system provided by the present invention is described below. The internal combustion engine combustion system described below and the hydrogen injector described above can be referred to each other.

[0041] The embodiment of the present invention also provides an internal combustion engine combustion system, including a hydrogen injector as described in the above embodiments. Specifically, the internal combustion engine combustion system also includes a combustion chamber, which is divided into two parts, including a jet chamber and a main combustion chamber. The jet chamber is arranged at the top center of the cylinder head, and a spark plug and an air passage are arranged in the jet chamber. A jet hole is arranged at the bottom of the jet chamber, and the main combustion chamber is connected to the jet chamber through the jet hole. The extended nozzle 10 of the hydrogen injector is partially inserted into the jet chamber, so that the second hydrogen injection port 12 extends into the jet chamber. In this way, the extended nozzle 10 can be added on the basis of the existing hydrogen injector, thereby greatly reducing the processing and design costs. By extending the nozzle 10, the internal injection port of the hydrogen injector body 6 can be kept away from the high temperature and high pressure area, and the heat insulation pin 9 is installed in the extended nozzle 10, which can increase the thermal resistance and achieve the effect of heat insulation, thereby effectively solving the heat load problem, improving the service life of the hydrogen injector, and facilitating the efficient, reliable and stable operation of the engine. In addition, by lengthening the nozzle 10, the hydrogen injector body 6 can be moved away from the top of the main combustion chamber, solving the installation difficulty problem caused by insufficient space at the top of the main combustion chamber. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the above hydrogen injector, so it will not be repeated here.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrogen injector, characterized in that: include: A hydrogen injector body (6), wherein the hydrogen injector body (6) is provided with a first hydrogen injection port (11); an extended nozzle (10) disposed at one end of the hydrogen injector body (6) close to the first hydrogen injection port (11), the extended nozzle (10) extending along the axial direction of the hydrogen injector body (6), and a second hydrogen injection port (12) being disposed at one end of the extended nozzle (10) away from the hydrogen injector body (6); A heat-insulating pin (9) is arranged in the extended nozzle (10), the heat-insulating pin (9) is located between the first hydrogen injection port (11) and the second hydrogen injection port (12), the heat-insulating pin (9) is provided with a through hole (13) extending through the heat-insulating pin (9) along its axial direction, one end of the through hole (13) is connected to the first hydrogen injection port (11), and the other end is connected to the second hydrogen injection port (12).

2. The hydrogen injector according to claim 1, characterized in that: One end of the extended nozzle (10) is provided with an opening, and the hydrogen injector body (6) is inserted into the opening; the other end of the extended nozzle (10) is provided with a closed surface, and the second hydrogen injection port (12) is arranged on the closed surface.

3. The hydrogen injector according to claim 2, characterized in that: The closed surface is provided with at least one through hole to form the second hydrogen injection port (12).

4. The hydrogen injector according to claim 2, characterized in that: The closed surface is a curved surface, and an arc-shaped protrusion (14) matching the curved surface is provided at one end of the heat-insulating pin (9) close to the closed surface.

5. The hydrogen injector according to claim 1, characterized in that: An arc-shaped recessed portion (15) is provided at one end of the heat-insulating pin (9) close to the first hydrogen injection port (11).

6. The hydrogen injector according to claim 1, characterized in that: Also includes: A wiring harness connector (1) connected to the hydrogen injector body (6); A control unit is connected to the wiring harness connector (1) via a control signal line, and the control unit is used to control the injection timing and pulse width of the hydrogen injector body (6).

7. The hydrogen injector according to claim 1, characterized in that: Also includes: A hydrogen pipeline is connected to an end of the hydrogen injector body (6) away from the first hydrogen injection port (11), and the hydrogen pipeline is used to introduce hydrogen into the interior of the hydrogen injector body (6).

8. The hydrogen injector according to claim 7, characterized in that: Also includes: A filter (2) is arranged at one end of the hydrogen injector body (6) close to the hydrogen pipeline, and the filter (2) is used to filter the hydrogen entering the hydrogen injector body (6).

9. The hydrogen injector according to claim 1, characterized in that: The hydrogen injection pressure of the hydrogen injector is greater than 2 MPa.

10. An internal combustion engine combustion system, characterized in that: The invention comprises the hydrogen injector as claimed in any one of claims 1 to 9.

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