Oil injector body assembly and oil injector body thereof

Abstract

The fuel injector body comprises a hollow cylinder body, the cylinder body is provided with a first port and a second port which are oppositely arranged in the length direction, the cylinder body is provided with an inner surface and an outer surface which are opposite in the wall thickness direction, and a pressing mechanism is integrally arranged on the outer surface close to the first port; the pressing mechanism can be pressed on the upper surface of the gas rail in a zero-clearance mode, a matching part is arranged on the circumferential direction of the pressing mechanism in an outward protruding mode, a first installation part is arranged on the matching part, the gas rail is provided with a second installation part used for installing the connecting piece, the first installation part and the second installation part are correspondingly arranged, and the connecting piece can be connected with the second installation part through the first installation part. By arranging the oil injector body integrated with the pressing mechanism, it is guaranteed that the oil injector body is reliably pressed on the gas rail, stress is uniform, in addition, cost can be saved, and the requirement for the matching precision between the sizes can be lowered.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas injector structure, and in particular to an injector body assembly and its injector body. Background Technology

[0002] Currently, the injector body is usually fixed on the air rail using a combination of pressure plate and bolts.

[0003] like Figure 1 and Figure 2 As shown, an annular boss 320 is provided on the outer periphery of the injector body 310. A step 120 is provided on the air rail 110 to mate with the boss 320. During installation, the boss 320 of the injector body 310 is installed at the step 120 of the air rail 110. The upper surface of the boss 320 of the injector body 310 is used to contact the pressure plate 410. The upper surface of the boss 320 is higher than the upper surface of the air rail 110, allowing the preload of the bolt 210 to be transmitted through the pressure plate 410 to the boss 320 of the injector body 310, and then through the boss 320 to the step 120 of the air rail 110, thereby pressing the injector body 310 firmly onto the air rail 110.

[0004] Because the upper surface of the boss 320 that contacts the pressure plate 410 is higher than the upper surface of the air rail 110, a predetermined gap is formed between the lower surface of the pressure plate 410 and the upper surface of the air rail 110 after the pressure plate 410 and bolt 210 install the injector body 310 onto the air rail 110. This gap causes the tightening force transmitted by the bolt 210 to the pressure plate 410 to be borne by the very small contact area between the pressure plate 410 and the upper surface of the boss 320 of the injector body 310. This results in a large contact stress between the pressure plate 410 and the injector body 310, which may even exceed the yield strength of the pressure plate 410 material. Once the yield strength of the pressure plate 410 is exceeded, the pressure plate 410 will undergo yield deformation, leading to the loss of the bolt preload and the loss of the pressure plate 410's clamping function. Consequently, the injector body 310 cannot be reliably fixed onto the air rail 110.

[0005] Furthermore, to ensure that the preload of bolt 210 can be transmitted through pressure plate 410 to injector body 310 and then to air rail 110, after the pressure plate 410 and bolt 210 install injector body 310 on air rail 110, a predetermined gap H should theoretically be formed between the lower surface of pressure plate 410 and the upper surface of air rail 110. To form the aforementioned predetermined gap H, the fitting accuracy requirements for the thickness of pressure plate 410, the depth of step 120 of air rail 110, and the height of boss 320 of injector body 310 are all high. Otherwise, it cannot be guaranteed that when the bolt 210 is tightened and the boss 320 of injector body 310 is in complete contact, a certain assembly gap can still be formed between the lower surface of pressure plate 410 and the upper surface of air rail 110, thus making it impossible to reliably guarantee that the preload of bolt 210 can be transmitted to air rail 110 through pressure plate 410 and injector body 310. Specifically, the assembly gap is smaller than the predetermined gap H but larger than a certain threshold. Since the pressure plate 410 will be subjected to the pre-tightening force of the bolt 210 and undergo slight deformation, the assembly gap is usually smaller than the predetermined gap H.

[0006] Therefore, it is necessary to propose an injector body assembly and its injector body to solve at least one of the above problems. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides an injector body assembly and its injector body. The injector body can be pressed onto the air rail with zero gap through an integrated pressing mechanism, which helps to ensure that the injector body is reliably pressed onto the air rail and that the force is uniform. In addition, it can save costs and reduce the accuracy requirements for the fit between dimensions.

[0008] The specific technical solution of this utility model embodiment is as follows:

[0009] A fuel injector body includes: a hollow cylinder having a first port and a second port disposed opposite to each other along its length; the cylinder having an inner surface and an outer surface opposite to each other along its wall thickness; a pressing mechanism integrated on the outer surface near the first port; the pressing mechanism being able to press against the upper surface of an air rail with zero clearance; a mating portion protruding outward in the circumferential direction of the pressing mechanism; a first mounting portion being disposed on the mating portion; and a second mounting portion being disposed on the air rail for mounting a connector; the first mounting portion and the second mounting portion being disposed correspondingly; when the fuel injector body is fixed on the air rail by the connector, the connector can be connected to the second mounting portion through the first mounting portion.

[0010] In a preferred embodiment, the pressing mechanism has a pressing surface facing the upper surface of the air rail, the pressing surface being arranged parallel to the upper surface of the air rail, and the pressing surface being able to directly press against the upper surface of the air rail with zero gap.

[0011] In a preferred embodiment, the pressing mechanism is arranged in a 360° closed configuration along the circumference of the cylinder.

[0012] In a preferred embodiment, the mating parts include a plurality of mating parts, which are evenly spaced along the circumference of the cylinder.

[0013] In a preferred embodiment, there are two mating parts, which are symmetrically distributed 180° apart along the circumference of the cylinder.

[0014] In a preferred embodiment, the pressing mechanism and the cylinder are integrally formed.

[0015] In a preferred embodiment, the integral molding method includes any one of the following: casting, bar milling, forging, and powder metallurgy.

[0016] In a preferred embodiment, the first mounting portion is a mounting hole, the second mounting portion is a fastening hole, the connector is a fastener, and the fastener can extend into the fastening hole through the mounting hole.

[0017] In a preferred embodiment, the center of the fastening hole is at a first distance from the center of the cylinder, and the center of the mounting hole is at a second distance from the center of the cylinder, wherein the difference between the first distance and the second distance is 0 or within a predetermined range.

[0018] An injector body assembly, the injector body assembly comprising any of the injector bodies described above.

[0019] In a preferred embodiment, the injector body assembly further includes a magnetic shielding ring and a stationary iron core, which are sequentially fixedly installed on the first port of the injector body.

[0020] The technical solution of this utility model has the following significant beneficial effects:

[0021] In this embodiment, by providing an injector body with an integrated pressing mechanism, the original predetermined gap is eliminated. The injector body can be pressed onto the air rail with zero gap via the pressing mechanism. When the injector body directly contacts the upper surface of the air rail using the integrated pressing mechanism, the contact area between the pressing mechanism and the upper surface of the air rail is large and the force is uniform, effectively improving the reliability of the mating position and avoiding the problem of pressure plate failure due to contact stress exceeding the yield strength in the prior art. Since the predetermined gap is eliminated, the pressing mechanism directly presses onto the upper surface of the air rail, eliminating the need for a predetermined height step on the air rail. Furthermore, there is no strict fitting accuracy requirement between the pressing mechanism and the air rail in the height direction, thereby saving costs and simplifying the assembly process. In addition, since a separate pressure plate structure is not required, costs are also reduced, assembly time is shortened, and the number of parts is reduced, thus reducing the management costs of parts.

[0022] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0024] Figure 1 This is a schematic diagram of the fitting relationship in the prior art where a pressure plate fixes the injector body to the air rail by bolts.

[0025] Figure 2 This is a top view of a prior art method in which a pressure plate fixes the injector body to the air rail by bolts;

[0026] Figure 3 This is a schematic diagram illustrating the fit between an injector body and an air rail, as provided in an embodiment of this application.

[0027] Figure 4This is a top view of an injector body fixed to an air rail by bolts according to an embodiment of this application.

[0028] Figure 5 This is a front view of an injector body provided in an embodiment of this application;

[0029] Figure 6 for Figure 5 Sectional view at point AA;

[0030] Figure 7 This is a bottom view of an injector body provided in the embodiments of this application;

[0031] Figure 8 This is a schematic diagram of the structure of an injector body assembly provided in the embodiments of this application;

[0032] Figure 9 This is a front view of an injector body assembly provided in an embodiment of this application;

[0033] Figure 10 for Figure 9 Sectional view at point BB;

[0034] Figure 11 This is a top view of an injector body assembly provided in the embodiments of this application.

[0035] Prior art reference numerals:

[0036] 110. Air rail;

[0037] 120. Steps;

[0038] 210. Bolts;

[0039] 310. Injector body;

[0040] 320. Boss;

[0041] 410. Pressure plate;

[0042] H, scheduled interval.

[0043] Reference numerals in the figures of this application:

[0044] 100. Air rail;

[0045] 101. Upper surface;

[0046] 102. Second Installation Section;

[0047] 200. Connectors;

[0048] 1. Injector body

[0049] 10. Pressure plate mechanism;

[0050] 11. First port;

[0051] 12. Second port;

[0052] 13. Sealing groove;

[0053] 14. Coordination Department;

[0054] 15. First Installation Section;

[0055] 16. Pressed surface;

[0056] 2. Magnetic shielding ring;

[0057] 3. Static iron core. Detailed Implementation

[0058] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0059] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0060] Unless otherwise defined, 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. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] Because the contact stress between the pressure plate and the injector body in existing technologies easily exceeds the yield strength of the pressure plate, bolt preload is lost, resulting in the loss of the pressure plate's clamping function. For those skilled in the art, an obvious approach is to directly increase the yield strength of the pressure plate. Common methods for increasing the yield strength of the pressure plate include selecting better steel and employing superior heat treatment processes. However, these methods would significantly increase component costs, making them less than ideal for improvement.

[0062] This utility model provides an injector body that can be pressed onto the air rail with zero gap through an integrated pressing mechanism. This helps to ensure that the injector body is reliably pressed onto the air rail and that the force is uniform. In addition, it can save costs and reduce the accuracy requirements for the fit between dimensions.

[0063] Please refer to the following for comprehensive information. Figures 3 to 7 This application specification provides an injector body 1, which may include: a hollow cylinder having a first port 11 and a second port 12 disposed opposite to each other along its length direction; the cylinder having an inner surface and an outer surface opposite to each other along its wall thickness direction; a pressing mechanism integrated on the outer surface near the first port 11; the pressing mechanism can press against the upper surface 101 of the air rail 100 with zero clearance; a mating part 14 protruding outward in the circumferential direction of the pressing mechanism; a first mounting part 15 disposed on the mating part 14; and a second mounting part 102 disposed on the air rail 100 for mounting a connector 200; the first mounting part 15 and the second mounting part 102 are correspondingly disposed; when the injector body 1 is fixed on the air rail 100 by the connector 200, the connector 200 can be connected to the second mounting part 102 through the first mounting part 15.

[0064] In this embodiment, by providing an injector body 1 with an integrated pressing mechanism, the original predetermined gap is eliminated. The injector body 1 can be pressed onto the air rail 100 with zero gap via the pressing mechanism. When the injector body 1 directly contacts the upper surface 101 of the air rail 100 using the integrated pressing mechanism, the contact area between the pressing mechanism and the upper surface 101 of the air rail 100 is large and the force is uniform, effectively improving the reliability of the mating position and avoiding the problem of pressure plate failure due to contact stress exceeding the yield strength in the prior art. Since the predetermined gap is eliminated, the pressing mechanism directly presses onto the upper surface 101 of the air rail 100. At this time, the air rail 100 no longer needs to be provided with a step of predetermined height, and there is no strict fitting accuracy requirement between the pressing mechanism and the air rail 100 in the height direction, thereby saving costs and simplifying the assembly process. In addition, since a separate pressure plate is not required, costs are also reduced, assembly time is shortened, and the number of parts is reduced, thereby reducing the management costs of parts.

[0065] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0066] The injector body 1 is mainly used to provide a precise installation position and fixing method for the injector, ensuring the correct installation of the injector on the engine, ensuring a stable connection between the injector and related engine components (such as the air rail 100), and preventing the injector from loosening or shifting during operation, which would affect the injection effect.

[0067] The injector body 1 includes a hollow cylinder, which may be longitudinally elongated and rotary. The cylinder has a first port 11 and a second port 12 disposed opposite each other along its length. The first port 11 and the second port 12 are open ends. The cylinder has opposing inner and outer surfaces along its wall thickness, wherein the inner surface may form a hollow cavity, and the outer surface may be provided with a plurality of sealing grooves 13 for setting sealing rings. A pressing mechanism is integrated on the outer surface near the first port 11.

[0068] Specifically, the pressing mechanism and the cylinder can be an integrally formed structure. Specifically, the integral forming method can include any of the following: casting, bar machining, forging, and powder metallurgy. Of course, the integral forming method of the pressing mechanism and the cylinder is not limited to the examples above. Those skilled in the art, guided by the technical essence of this application, may make other modifications, but as long as the achieved function and effect are the same as or similar to that of this application, they should all be covered within the scope of protection of this application.

[0069] In one specific embodiment, the integral molding method can be casting. For example, the injector body 1 itself can be made of ferritic stainless steel, preferably using precision casting. The pressure plate mechanism 10 and the cylinder are formed by precision casting, which does not require additional machining and has a low manufacturing cost.

[0070] When the injector body 1 is installed on the air rail 100 via the connector 200, the upper surface 101 of the pressing mechanism abuts against the connector 200, and the lower surface of the pressing mechanism abuts against the upper surface 101 of the air rail 100. That is, when the pressing mechanism engages with the air rail 100, it can press against the upper surface 101 of the air rail 100 with zero clearance, thereby eliminating the original predetermined gap and achieving the aforementioned technical effect.

[0071] Specifically, in order to reliably fix the injector body 1 onto the air rail 100, the pressing mechanism is provided with a circumferentially outwardly protruding mating part 14. The mating part 14 is provided with a first mounting part 15, and the air rail 100 is provided with a second mounting part 102 for mounting the connector 200. The first mounting part 15 and the second mounting part 102 are correspondingly arranged. When the injector body 1 is fixed onto the air rail 100 by the connector 200, the connector 200 can be connected to the second mounting part 102 through the first mounting part 15.

[0072] like Figure 3As shown, in one embodiment, the pressing mechanism has a pressing surface 16 facing the upper surface 101 of the air rail 100. The pressing surface 16 is arranged parallel to the upper surface 101 of the air rail 100, and the pressing surface 16 can be directly pressed onto the upper surface 101 of the air rail 100 with zero gap.

[0073] In this embodiment, the pressing mechanism can be a flat plate structure with a certain thickness. The pressing surface 16 of the pressing structure can be parallel to the upper surface 101 of the air rail 100. This ensures that when the pressing mechanism contacts the air rail 100, it can directly press against the upper surface 101 of the air rail 100 with zero gap. This ensures that there is a large contact area between the pressing surface 16 of the pressing mechanism and the upper surface 101 of the air rail 100, thereby ensuring that there is a small contact stress between the pressing surface 16 of the pressing mechanism and the upper surface 101 of the air rail 100. This ensures the reliability of the pressing mechanism during use and effectively extends its service life.

[0074] like Figure 4 and Figure 7 As shown, in one embodiment, the pressing mechanism is arranged in a 360° closed configuration along the circumference of the cylinder.

[0075] In this embodiment, since the pressing mechanism is directly integrated onto the outer surface of the cylinder, there is no need to consider the interference between the pressure plate and the injector body 1 during assembly, allowing the pressing mechanism to be arranged in a closed configuration along the circumference of the cylinder. When the pressing mechanism is arranged in a closed configuration along the circumference of the cylinder, i.e., arranged in a complete circle, compared to existing technologies (such as... Figure 2 As shown, the pressure plate has a circumferentially partially open structure, which can ensure that there is a large contact area between the pressing surface 16 of the pressing mechanism and the upper surface 101 of the air rail 100, thereby ensuring that a small contact stress is generated between the pressing surface 16 of the pressing mechanism and the upper surface 101 of the air rail 100, and at the same time ensuring that the stress distribution between the pressing surface 16 of the pressing mechanism and the upper surface 101 of the air rail 100 is uniform.

[0076] Please refer to the following: Figure 5 , Figure 6 and Figure 7 In one embodiment, the mating part 14 includes a plurality of mating parts 14, which are evenly spaced along the circumference of the cylinder.

[0077] In this embodiment, the mating part 14 is mainly used to mate with the connector 200 to fix the pressure plate mechanism 10 and the air rail 100. The specific structure of the mating part 14 can be in the form of a lug. Of course, the structure of the mating part 14 can also be in other forms and is not limited to the above description. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to those of this application, they should be covered within the protection scope of this application.

[0078] The number of mating parts 14 may be multiple, and the multiple mating parts 14 are evenly distributed along the circumference of the cylinder, so as to ensure that when the pressing mechanism is connected to the air rail 100 through the connector 200, the force can be evenly distributed, and the injector body 1 can be reliably fixed on the air rail 100.

[0079] Specifically, the number of mating parts 14 can be two, three, or even more. When multiple mating parts 14 are evenly spaced along the circumference, it can help to make the stress distribution between the pressure plate mechanism 10 and the air rail 100 more uniform.

[0080] like Figure 7 As shown, in one specific embodiment, there are two mating parts 14, and the two mating parts 14 are symmetrically distributed along the circumference of the cylinder at a distance of 180°.

[0081] In this embodiment, when there are two mating parts 14, the two mating parts 14 are symmetrically distributed along the circumference of the cylinder at a distance of 180°, so that the pressure plate mechanism 10 and the air rail 100 can be fixedly installed with the minimum number of mating parts, and at the same time, it is beneficial to make the stress distribution between the pressure plate mechanism 10 and the air rail 100 more uniform.

[0082] like Figure 3 As shown, in one embodiment, the first mounting portion 15 is a mounting hole, the second mounting portion 102 is a fastening hole, and the connector 200 is a fastener that can extend into the fastening hole through the mounting hole.

[0083] In this embodiment, the first mounting portion 15 can specifically be in the form of a mounting hole, the second mounting portion 102 can specifically be in the form of a fastening hole, such as a threaded hole, and the connector 200 can be in the form of a fastener, such as a bolt. In this embodiment, the fastener is illustrated by example as a bolt, and the fastening hole is illustrated by example as a threaded hole. Of course, the specific forms of the fastener and the fastening hole are not limited to the above examples. Those skilled in the art may make other modifications based on the technical essence of this application, but as long as the function and effect achieved are the same as or similar to those of this application, they should all be covered within the scope of protection of this application.

[0084] During installation, the mounting hole is aligned with the fastening hole, and then the fastener is screwed into the threaded hole through the mounting hole. When the fastener is locked, the injector body 1 can be fixedly installed on the air rail 100.

[0085] In one specific embodiment, the center of the fastening hole is at a first distance from the center of the cylinder, and the center of the mounting hole is at a second distance from the center of the cylinder, wherein the difference between the first distance and the second distance is 0 or within a predetermined range.

[0086] In this embodiment, since the pressure plate mechanism 10 is integrated onto the cylinder, to ensure that the mounting hole and the fastening hole are aligned, the distances from the center of the fastening hole to the center of the cylinder and from the center of the mounting hole to the center of the cylinder can be controlled to be equal or similar. Generally, the diameter of the mounting hole is slightly larger than the diameter of the fastening hole. It is only necessary to ensure that when the cylinder of the injector body 1 is installed in the air rail 100, the projection of the mounting hole onto the fastening hole can cover the fastening hole, ensuring that the fastener can pass through the mounting hole and extend into the fastening hole. Specifically, the numerical range of the difference between the first and second distances is not limited to a single value in this application.

[0087] Please refer to the following: Figure 8 , Figure 9 , Figure 10 and Figure 11 In this application embodiment, an injector body 1 assembly is also provided. The injector body 1 assembly includes the above-mentioned injector body 1. By setting the injector body 1, the injector body 1 assembly can achieve the technical effects achieved by the injector body 1 embodiment. For details, please refer to the specific description of the above embodiment. This application will not repeat it here.

[0088] In one embodiment, the injector body 1 assembly may further include a magnetic shielding ring 2 and a stationary iron core 3, wherein the magnetic shielding ring 2 and the stationary iron core 3 are sequentially fixedly installed on the first port 11 of the injector body 1.

[0089] In this embodiment, a magnetic shielding ring 2 can be welded onto the first port 11 of the injector body 1. The magnetic shielding ring 2 can be circular in shape. The magnetic shielding ring 2 can be made of non-magnetic material, which can prevent magnetic lines of force from passing through non-critical paths, so that the magnetic field generated by the coil is more concentrated on key components such as the valve core, allowing more magnetic lines of force to pass through the valve core, reducing magnetic leakage, thereby improving the utilization efficiency of electromagnetic force and making the injector work more efficiently.

[0090] The upper part of the magnetic shielding ring 2 can be welded with a stationary iron core 3. The stationary iron core 3 can be a hollow rotating structure to support the armature. When the injector's solenoid coil is energized, it generates a magnetic field. Under the action of the magnetic field force, the moving iron core is attracted and moves upward. The moving iron core is connected to the valve core. The upward movement of the moving iron core will drive the valve core to rise against the spring force, opening the valve hole on the valve seat, and high-pressure fuel will be injected from the valve seat, realizing the fuel injection process. For example, when the engine control unit issues a fuel injection command according to the engine operating conditions, the solenoid coil is energized, the moving iron core moves, and the valve seat is opened to inject fuel.

[0091] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0092] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0093] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A fuel injector body, characterized in that, The injector body includes: A hollow cylinder has a first port and a second port arranged opposite each other along its length. The cylinder also has an inner surface and an outer surface opposite each other along its wall thickness. A pressing mechanism is integrated on the outer surface near the first port. This pressing mechanism has a pressing surface facing the upper surface of the air rail, and the pressing surface is parallel to the upper surface of the air rail. The pressing surface can directly press against the upper surface of the air rail with zero clearance. The pressing mechanism has a circumferentially protruding mating part, and the mating part is provided with a first mounting part. The air rail is provided with a second mounting part for mounting the connector. The first mounting part and the second mounting part are correspondingly arranged. When the injector body is fixed on the air rail by the connector, the connector can be connected to the second mounting part through the first mounting part.

2. The injector body as described in claim 1, characterized in that, The pressing mechanism is arranged in a 360° closed configuration along the circumference of the cylinder.

3. The injector body as described in claim 2, characterized in that, The mating parts include multiple parts, which are evenly spaced along the circumference of the cylinder.

4. The injector body as described in claim 3, characterized in that, The number of mating parts is two, and the two mating parts are symmetrically distributed along the circumference of the cylinder at a 180° interval.

5. The injector body as described in claim 1, characterized in that, The pressing mechanism and the cylinder are integrally formed.

6. The injector body as described in claim 5, characterized in that, The integral molding method includes any one of the following: casting, bar machining, forging, and powder metallurgy.

7. The injector body as described in claim 1, characterized in that, The first mounting part is a mounting hole, the second mounting part is a fastening hole, the connector is a fastener, and the fastener can extend into the fastening hole through the mounting hole.

8. The injector body as described in claim 7, characterized in that, The center of the fastening hole is at a first distance from the center of the cylinder, and the center of the mounting hole is at a second distance from the center of the cylinder. The difference between the first distance and the second distance is 0 or within a predetermined range.

9. A fuel injector body assembly, characterized in that, The injector body assembly includes the injector body as described in any one of claims 1 to 8.

10. The injector body assembly as described in claim 9, characterized in that, The injector body assembly also includes a magnetic shielding ring and a stationary iron core, which are sequentially fixedly installed on the first port of the injector body.

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