A fuel injector nozzle structure

Abstract

The application discloses an oil injector nozzle structure and belongs to the field of oil injectors. Mainly including an oil injector shell, one side of the oil injector shell is provided with an electromagnetic valve, the outer side of the electromagnetic valve is provided with a threaded sleeve, one end of the threaded sleeve is provided with a spray pipe, one end of the spray pipe is provided with a spray adjusting assembly, the spray adjusting assembly comprises: a spray head fixedly installed at one end of the spray pipe, an inclined hole one is arranged in the outer wall of the spray head, a protection end is arranged at one end of the spray head, an inclined hole two is arranged in the outer wall of the protection end, an insertion slot is arranged in the spray head, and a clamping block is arranged on the inner side of the insertion slot. The oil injector nozzle structure of the application controls the position of the plug through the setting of the needle valve body, sequentially opens the plugging of the inclined hole one and the inclined hole two, makes the fuel uniformly dispersed and sprayed in the spraying process, improves the dispersion rate, and ensures the thermal efficiency.

Description

Technical Field

[0001] This application relates to the field of fuel injectors, specifically to a fuel injector nozzle structure. Background Technology

[0002] The fuel injector is a key component of the engine's fuel injection system. Its main function is to precisely inject fuel into the engine's intake manifold or cylinders. In intake manifold injection engines, the injector, according to the engine's firing order and injection timing, injects well-atomized fuel into the intake manifold at appropriate pressure and angle, ensuring thorough mixing of fuel with the incoming air to form a homogeneous combustible mixture, providing a reliable foundation for the subsequent combustion process.

[0003] The use of fuel injectors requires the use of nozzle structures, which are the core components of the fuel injector and directly affect its fuel injection performance. The shape and size of the nozzle determine the fuel injection pattern and atomization effect. Using multi-hole nozzles can make the fuel form multiple small droplets after it is sprayed out, increasing the contact area between the fuel and air, thereby accelerating the evaporation rate of the fuel, promoting the uniform formation of the air-fuel mixture, and improving combustion efficiency.

[0004] The core component of existing fuel injectors, the fuel injector nozzle, is essentially a precision solenoid valve device. Its working principle is that when the solenoid coil is energized, it generates a magnetic attraction effect, which drives the needle valve to lift and open the injection orifice. Under pressure, fuel is injected at high speed through the annular gap between the needle valve head and the injection orifice, forming atomized particles, thereby promoting combustion efficiency. However, the atomization dispersion range is limited to the vicinity of the annular gap, and the dispersion degree is low, making it difficult to improve thermal efficiency. Therefore, it is necessary to provide a fuel injector nozzle structure to solve the above problems. Summary of the Invention

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide an injector nozzle structure that can achieve the effect of setting an injection hole for auxiliary guiding injection while injecting, thereby improving the dispersion.

[0006] The technical solution adopted by this application to solve its technical problem is: an injector nozzle structure, including: an injector housing, a solenoid valve is provided on one side of the injector housing, a threaded sleeve is provided on the outside of the solenoid valve, and a nozzle pipe is provided at one end of the threaded sleeve;

[0007] A jet adjustment assembly is provided at one end of the nozzle, the jet adjustment assembly comprising:

[0008] A nozzle is fixedly installed at one end of a spray pipe. The nozzle has an inclined hole 1 inside its outer wall and a protective end at one end. The protective end has an inclined hole 2 inside its outer wall.

[0009] The nozzle has an internal insertion slot, and a snap-fit ​​block is provided on the inner side of the insertion slot.

[0010] Furthermore, an oil inlet pipe connector is fixedly installed at one end of the injector housing, and a return oil pipe is fixedly connected to one side of the injector housing.

[0011] Furthermore, a needle valve sleeve is fixedly installed on the inner side of the threaded sleeve, and a needle valve body is installed on the inner side of the needle valve sleeve.

[0012] Furthermore, a plug is slidably connected to the inner side of the nozzle, one end of which is fixedly connected to the needle valve body, and the end of the plug is adapted to the inner diameter of the nozzle.

[0013] Furthermore, a receiving baffle is fixedly connected to one inner end of the protective end, and the inner groove of the receiving baffle is adapted to the end of the plug.

[0014] Furthermore, an annular groove is formed inside one wall of the nozzle, and an elastic connector is connected to the inner side of the annular groove. A retaining ring is fixedly connected to one side of the elastic connector.

[0015] Furthermore, the top wall of the retaining ring is attached to the junction of the insertion groove and the annular groove.

[0016] Furthermore, the snap-fit ​​block is fixedly installed on one side of the protective end, and four snap-fit ​​blocks are provided, each snap-fit ​​block being adapted to the wide side of the insertion slot.

[0017] The beneficial effects of this application are: the injector nozzle structure provided by this application controls the position of the plug by setting a needle valve body, and sequentially opens the seals on the first and second inclined holes, so that the fuel is evenly dispersed and sprayed during the injection process, thereby improving the dispersion rate and ensuring thermal efficiency.

[0018] The plug and the protective end are locked together, and the inner side is equipped with a retaining ring with elastic compression properties to limit the locking block after rotation, which facilitates the disassembly and replacement of the protective end, facilitates the cleaning of the oil injection hole, and avoids affecting the atomization and dispersion efficiency.

[0019] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. These will be further described in detail below with reference to figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is an overall schematic diagram of an injector nozzle structure according to this application;

[0022] Figure 2 for Figure 1 A partial cross-sectional view of the internal structure of the threaded sleeve;

[0023] Figure 3 for Figure 2 A schematic diagram of a partial explosion of the central injection adjustment component;

[0024] Figure 4 for Figure 3 A partial cross-sectional view of the internal structure of the central nozzle;

[0025] The following are the labeling elements in the figure:

[0026] 1. Injector housing; 2. Inlet pipe connector; 3. Return pipe; 4. Solenoid valve; 5. Screw sleeve; 6. Needle valve sleeve; 7. Needle valve body; 8. Injection pipe;

[0027] 9. Spray adjustment assembly; 901. Nozzle; 902. Angled hole one; 903. Plug; 904. Protective end; 905. Angled hole two; 906. Receiving baffle; 907. Snap-fit ​​block; 908. Insertion groove; 909. Annular groove; 910. Retaining ring; 911. Elastic connector. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] like Figure 1 - Figure 4 As shown, this application provides a fuel injector nozzle structure, including: a fuel injector housing 1, a solenoid valve 4 is provided on one side of the fuel injector housing 1, the solenoid valve 4 is used to control the position adjustment of the needle valve body 7 after being energized, a screw sleeve 5 is provided on the outside of the solenoid valve 4, the screw sleeve 5 is used for positioning and installing the internal nozzle 8 and nozzle 901, and a nozzle 8 is provided at one end of the screw sleeve 5, the nozzle 8 is connected to the fuel inlet pipe joint 2 for fuel delivery.

[0031] like Figure 1As shown: One end of the injector housing 1 is fixedly installed with an inlet pipe connector 2, and one side of the injector housing 1 is fixedly connected with a return pipe 3. The return pipe 3 is connected to an external fuel supply mechanism to provide fuel to the injector. The return pipe 3 leads excess fuel and fuel vapor generated in the injector back to the fuel tank, and at the same time plays the role of balancing pressure, cooling and diagnosis.

[0032] like Figure 1 As shown: A needle valve sleeve 6 is fixedly installed on the inner side of the threaded sleeve 5, and a needle valve body 7 is installed on the inner side of the needle valve sleeve 6. When the solenoid valve 4 is energized, it controls the movement of the needle valve body 7. The movement of the needle valve body 7 is axially limited by the needle valve sleeve 6.

[0033] An injection adjustment assembly 9 is provided at one end of the nozzle 8. The injection adjustment assembly 9 is used for adjustment before fuel injection.

[0034] like Figure 3 As shown: A plug 903 is slidably connected to the inner side of the nozzle 901. One end of the plug 903 is fixedly connected to the needle valve body 7. The end of the plug 903 is adapted to the inner diameter of the nozzle 901. The lifting and lowering of the needle valve body 7 controls the position adjustment of the plug 903. The plug 903 slides inside the nozzle 901, which facilitates the sealing of the oblique hole 902.

[0035] like Figure 3 As shown: A receiving baffle 906 is fixedly connected to one inner end of the protective end 904. The inner groove of the receiving baffle 906 is adapted to the end of the plug 903. After the plug 903 moves, it fits against the inner side of the receiving baffle 906 to limit the movement and improve the stability of the adjustment.

[0036] A nozzle 901 is fixedly installed at one end of the nozzle pipe 8. The inner wall of the nozzle 901 is provided with a first inclined hole 902. The first inclined hole 902 is evenly distributed inside the outer wall of the nozzle 901 to facilitate the dispersion of fuel. One end of the nozzle 901 is provided with a protective end 904, which is used to support the plug 903. The inner wall of the protective end 904 is provided with a second inclined hole 905, which allows fuel that is not injected in time through the first inclined hole 902 to be sprayed out through the second inclined hole 905.

[0037] The nozzle 901 has an internal insertion groove 908, and an inner side of the insertion groove 908 has a snap-fit ​​block 907. After the snap-fit ​​block 907 is inserted into the inner side of the insertion groove 908 and rotated at a certain angle, it is used for positioning the nozzle 901 and the protective end 904.

[0038] like Figure 4As shown: An annular groove 909 is formed inside one wall of the nozzle 901. An elastic connector 911 is connected to the inner side of the annular groove 909. A retaining ring 910 is fixedly connected to one side of the elastic connector 911. The top wall of the retaining ring 910 fits against the junction of the insertion groove 908 and the annular groove 909. The insertion groove 908 and the annular groove 909 are connected, which makes it easy for the snap-fit ​​block 907 to rotate and adjust inside the annular groove 909 after passing through the insertion groove 908.

[0039] like Figure 4 As shown: The snap-fit ​​block 907 is fixedly installed on one side of the protective end 904. There are four snap-fit ​​blocks 907. The snap-fit ​​blocks 907 are adapted to the wide side of the insertion slot 908. The cooperation of multiple snap-fit ​​blocks 907 is used for positioning.

[0040] The working principle of this utility model is as follows: During the use of the injector, the solenoid valve 4 is energized, and the electromagnetic coil inside the solenoid valve 4 generates magnetism, controlling the position of the needle valve body 7. The needle valve body 7 slides stably inside the needle valve sleeve 6. Then, the needle valve body 7 controls the sliding position of the plug 903 inside the nozzle 901, allowing fuel to flow into the nozzle 901 through the gap between the end of the injection pipe 8 and the rod of the needle valve body 7. When the end of the plug 903 is attached to the receiving baffle 906, the oblique holes 901 can be opened sequentially. The sealing of 02 and the second inclined hole 905 ensures uniform dispersion spraying during the injection process, improving the dispersion rate. The plug 903 and the protective end 904 are positioned by the matching snap-fit ​​of the snap-fit ​​block 907 and the insertion groove 908. Furthermore, the inner side is equipped with a retaining ring 910 with elastic compression performance to limit the rotation of the snap-fit ​​block 907, facilitating the disassembly and replacement of the protective end 904. After removal, it is easy to clean the first inclined hole 902 and the second inclined hole 905, avoiding affecting the atomization dispersion efficiency and ensuring the thermal effect of fuel atomization in the injector.

[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fuel injector nozzle structure, characterized in that: include: Injector housing (1), a solenoid valve (4) is provided on one side of the injector housing (1), a screw sleeve (5) is provided on the outside of the solenoid valve (4), and a nozzle (8) is provided at one end of the screw sleeve (5). A jet adjustment assembly (9) is provided at one end of the nozzle (8), the jet adjustment assembly (9) comprising: A nozzle (901) is fixedly installed at one end of the nozzle pipe (8). The nozzle (901) has an inclined hole (902) inside its outer wall. A protective end (904) is provided at one end of the nozzle (901). An inclined hole (905) is provided inside the outer wall of the protective end (904). The nozzle (901) has an insertion groove (908) inside, and a snap-fit ​​block (907) is provided on the inner side of the insertion groove (908).

2. The injector nozzle structure according to claim 1, characterized in that: An oil inlet pipe connector (2) is fixedly installed at one end of the injector housing (1), and a return oil pipe (3) is fixedly connected to one side of the injector housing (1).

3. The injector nozzle structure according to claim 1, characterized in that: A needle valve sleeve (6) is fixedly installed on the inner side of the threaded sleeve (5), and a needle valve body (7) is installed on the inner side of the needle valve sleeve (6).

4. The injector nozzle structure according to claim 1, characterized in that: A plug (903) is slidably connected to the inside of the nozzle (901). One end of the plug (903) is fixedly connected to the needle valve body (7), and the end of the plug (903) is adapted to the inner diameter of the nozzle (901).

5. The injector nozzle structure according to claim 1, characterized in that: A receiving baffle (906) is fixedly connected to one end of the inner side of the protective end (904), and the inner groove of the receiving baffle (906) is adapted to the end of the plug (903).

6. The injector nozzle structure according to claim 1, characterized in that: An annular groove (909) is provided inside one wall of the nozzle (901), and an elastic connector (911) is connected to the inner side of the annular groove (909). A retaining ring (910) is fixedly connected to one side of the elastic connector (911).

7. The injector nozzle structure according to claim 6, characterized in that: The top wall of the retaining ring (910) is attached to the junction of the insertion groove (908) and the annular groove (909).

8. The injector nozzle structure according to claim 1, characterized in that: The snap-fit ​​block (907) is fixedly installed on one side of the protective end (904). There are four snap-fit ​​blocks (907). The snap-fit ​​block (907) is adapted to the wide side of the insertion slot (908).

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