Oil sprayer assembly, engine and vehicle
By introducing seals into the injector assembly, the corrosion problem of the injector shoulder was solved, resulting in improved injection accuracy and efficient and stable operation of the fuel system, thus extending the service life of the injector.
Patent Information
- Application Number
- CN202520603100.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-04-01
AI Technical Summary
The shoulder of the fuel injector is susceptible to corrosion from combustion products, which can lead to cracks and affect the lifespan of the injector and the performance of the fuel system.
A seal is introduced into the injector assembly. The seal forms a sealing contact with the injection end, preventing combustion products from entering the narrow space of the injector nozzle, protecting the nozzle from corrosion, and reducing fuel leakage.
It effectively prevents combustion products from corroding the nozzle shoulder, improves fuel injection accuracy, ensures efficient and stable engine operation, extends nozzle life, and improves fuel efficiency.
Smart Images
Figure CN223814123U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of engine, concretely relates to a fuel injector assembly, engine and vehicle. BACKGROUND
[0002] The fuel injector plays a crucial role in the fuel system of a vehicle. It is responsible for boosting fuel pressure and precisely controlling the timing and quantity of fuel injection. Additionally, the fuel injector has the ability to convert liquid fuel into a mist and mix it with air, providing the necessary fuel for the engine's combustion process and ensuring efficient and stable engine operation.
[0003] However, the combustion products of fuel are often corrosive to some extent, which poses a challenge to the durability of the fuel injector. In related technologies, the design of the fuel injector has not effectively isolated the combustion products from the shoulder part of the fuel injector nozzle. Since the shoulder part is a stress concentration area, direct contact of corrosive combustion products with the shoulder part of the fuel injector nozzle can cause cracks in the shoulder part. Once cracks occur, the service life of the fuel injector nozzle is severely affected, which in turn affects the performance of the entire fuel system and the operating efficiency of the vehicle.
[0004] Therefore, there is an urgent need to provide a fuel injector assembly, engine and vehicle to solve the above problems. SUMMARY
[0005] The purpose of the utility model is to at least solve the problem of preventing the shoulder part of the fuel injector nozzle from being corroded by combustion products. This purpose is achieved through the following technical solutions:
[0006] The first aspect of the utility model proposes a fuel injector assembly, comprising:
[0007] a fuel injector body;
[0008] a fuel injector nozzle arranged at the oil outlet end of the fuel injector body, the fuel injector nozzle comprising a shoulder part and a fuel injection end connected to the shoulder part;
[0009] a bushing sleeved on the outer circumferential side of the fuel injector nozzle, the bushing defining a first cavity and a second cavity in communication, the second cavity being located on the side of the first cavity away from the fuel injector body, the shoulder part being located in the first cavity, and the fuel injection end protruding from the shoulder part to the outside of the second cavity in the direction from the first cavity to the second cavity;
[0010] a cap arranged in the first cavity and sleeved on the fuel injection end, the fuel injection end extending from the cap;
[0011] A sealing member is arranged in the first cavity, the sealing member is sleeved on the oil injection end, the sealing member abuts against one end of the cap away from the oil injector body, and is configured to block the combustion products from entering the first cavity from the second cavity.
[0012] In the technical solution, the sealing member is sleeved on the oil injection end, and the sealing member and the outer wall of the oil injection end form a sealed contact structure. This design has important effects. First, it can effectively prevent the combustion products generated during the combustion process from penetrating from the second cavity to the first cavity, prevent these products from entering the narrow space between the cap and the oil injection nozzle, and avoid direct contact between the combustion products and the shoulder. If the combustion products come into contact with the shoulder, the shoulder may crack due to corrosion by the combustion products, which will directly affect the normal operation of the oil injection nozzle and thus affect the oil injection effect and reduce the performance of the engine. In addition, the design of the sealing member can significantly reduce the leakage of fuel during the injection process. By reducing the leakage, the oil injector assembly can more accurately control the injection amount of fuel, thereby improving the injection accuracy. The improvement of the injection accuracy is crucial to ensure that the engine can operate efficiently and stably. Therefore, by using the oil injector assembly in the technical solution, the oil injection nozzle can be protected from damage by the combustion products, and the use efficiency of fuel can be improved to ensure that the engine can maintain the best operating state under various working conditions.
[0013] In addition, the oil injector assembly of the utility model also has the following additional technical features:
[0014] In some embodiments of the utility model, the sealing member includes a sealing body and a lip, the lip is arranged along the inner circle of the sealing body, and the inner circle of the lip is in sealing contact with the outer wall of the oil injection nozzle.
[0015] In some embodiments of the utility model, along the axial direction of the sealing member, the thickness of the lip is 1 / 3 to 1 / 2 of the thickness of the sealing body.
[0016] In some embodiments of the utility model, the side of the lip away from the cap is connected to the inner wall of the sealing body through a rounded corner.
[0017] In some embodiments of the utility model, one side of the sealing member in contact with the cap is provided with a first sealing protrusion, and the first sealing protrusion is arranged along the circumferential direction of the sealing member.
[0018] In some embodiments of the utility model, the cross section of the first sealing protrusion is semicircular.
[0019] In some embodiments of the utility model, the bushing comprises a first sleeve part, a second sleeve part and a connecting part, the first sleeve part and the sleeve part are coaxially arranged and connected through the connecting part, the inner diameter of the first sleeve part is larger than the inner diameter of the second sleeve part, the connecting part and the sealing piece are sealedly contacted on the side away from the tight cap, the first cavity is located in the inside of the first sleeve part, and the second cavity is located in the inside of the second sleeve part.
[0020] In some embodiments of the utility model, the side of the sealing piece in contact with the connecting part is provided with a second sealing protrusion, and the second sealing protrusion is arranged in extension along the circumference of the sealing piece.
[0021] In the second aspect of the utility model, an engine is provided, which comprises a cylinder cover and the fuel injector assembly in the above-mentioned embodiments, and the cylinder cover is sleeved on the bushing.
[0022] In the third aspect of the utility model, a vehicle is provided, which comprises the engine in the above-mentioned embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present utility model. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:
[0024] Figure 1 A partial structure schematic view of an engine according to an embodiment of the utility model is schematically shown;
[0025] Figure 2 A cross-sectional schematic view of a sealing piece according to an embodiment of the utility model is schematically shown.
[0026] In the drawings, various reference numerals represent the following:
[0027] 100, fuel nozzle; 110, shoulder part; 120, fuel injection end;
[0028] 200, tight cap;
[0029] 300, sealing piece; 310, sealing body; 320, lip; 330, first sealing protrusion; 340, second sealing protrusion;
[0030] 400, bushing; 401, first cavity; 402, second cavity; 410, first sleeve part; 420, second sleeve part; 430, connecting part;
[0031] 500, cylinder cover 500; 600, valve needle. DETAILED DESCRIPTION
[0032] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.
[0033] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.
[0034] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
[0035] Spatially relative terms, such as "inner", "outer", "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below.
[0036] Figure 1 A partial structure schematic view of an engine according to the embodiment of the present application is schematically shown. Figure 2 A cross-sectional schematic view of the sealing member 300 according to the embodiment of the present application is schematically shown. Figure 1 And Figure 2 As shown in the drawings, the utility model provides a kind of oil atomizer assembly, and oil atomizer assembly includes oil atomizer body (not shown in drawing), oil nozzle 100, bushing 400, tight cap 200 and sealing member 300, oil nozzle 100 is arranged at the oil outlet end of oil atomizer body, and oil nozzle 100 includes shoulder part 110 and the oil injection end 120 connected with shoulder part 110;Bushing 400 is sleeved on the outer circumferential side of oil nozzle 100, and bushing 400 is defined with the first cavity 401 and the second cavity 402 being communicated, and the second cavity 402 is located at the side of first cavity 401 away from oil atomizer body, and shoulder part 110 is located in first cavity 401, and in the direction from first cavity 401 to second cavity 402, oil injection end 120 is protruded to the outside of second cavity 402 from shoulder part 110;Tight cap 200 is arranged in first cavity 401, and is sleeved on oil injection end 120, and oil injection end 120 is stretched out from tight cap 200;Sealing member 300 is arranged in first cavity 401, and sealing member 300 is sleeved on oil injection end 120, and sealing member 300 is abutted on the end of tight cap 200 away from oil atomizer body, and is configured to block combustion product from entering first cavity 401 from second cavity 402.
[0037] In the technical solution, by sleeving sealing member 300 on oil injection end 120, sealing member 300 and the outer wall of oil injection end 120 form a sealed contact structure, which plays an important role. First, it can effectively prevent the combustion products generated during the combustion process from penetrating from the second cavity 402 to the first cavity 401, preventing these products from entering the narrow space between the tight cap 200 and the oil nozzle 100, and thereby avoiding direct contact between the combustion products and the shoulder part 110. If the combustion products come into contact with the shoulder part 110, it may cause the shoulder part 110 to crack due to corrosion by the combustion products, which will directly affect the normal operation of the oil nozzle 100 and thereby affect the oil injection effect and reduce the performance of the engine. In addition, the design of the sealing member 300 can significantly reduce the leakage of fuel during the injection process. By reducing leakage, the oil atomizer assembly can more accurately control the amount of fuel injection, thereby improving the precision of fuel injection. The improvement of the precision of fuel injection is crucial to ensure that the engine can operate efficiently and stably. Therefore, by using the oil atomizer assembly in the technical solution, not only can the oil nozzle 100 be protected from damage by combustion products, but also the efficiency of fuel use can be improved, ensuring that the engine can maintain the best operating state under various working conditions.
[0038] In order to adapt to the high temperature and high pressure working environment that may be encountered, the sealing element 300 can be selected from materials with high temperature resistance and corrosion resistance, ensuring that the sealing element 300 can still maintain its excellent sealing performance under extreme conditions, and will not reduce its function due to the influence of temperature and pressure.
[0039] In the design of the sealing element 300, the size of the inner diameter is set according to the outer diameter of the oil nozzle 100. Such a design ensures that the sealing element 300 can closely fit with the oil nozzle 100, forming an interference fit, which can effectively prevent any looseness between the sealing element 300 and the oil nozzle 100. The use of interference fit not only improves the overall sealing performance, but also effectively prevents the loosening of the sealing element due to equipment vibration or thermal expansion caused by temperature changes. Therefore, the design cooperation between the sealing element 300 and the oil nozzle 100 is of great significance to ensure the stable operation of the entire system and prolong the service life of the equipment. In addition, the thickness of the sealing element 300 can be determined according to the actual application requirements and working conditions to achieve the best sealing effect.
[0040] Optionally, the connection between the cap 200 and the oil nozzle 100 adopts threaded fastening, which can effectively enhance the structural stability and prevent loosening. The threaded design of the cap 200 not only ensures firm connection, but also facilitates disassembly and maintenance, significantly improving the overall operation convenience.
[0041] Further, referring to Figure 1 and Figure 2 , the sealing element 300 includes a sealing body 310 and a lip 320, the lip 320 is arranged along the inner circle of the sealing body 310, and the inner circle of the lip 320 is in sealing contact with the outer wall of the oil nozzle 100.
[0042] In order to further improve the connection and sealing performance between the sealing element 300 and the oil nozzle 100, the sealing element 300 will be subjected to a certain extrusion effect after being installed in place. By arranging the lip 320, the contact area between the sealing element 300 and the outer wall of the oil nozzle 100 is reduced, so that the large stress exerted by the sealing element 300 on the oil nozzle 100 during installation can be effectively reduced. This design optimization helps to reduce the wear of the oil nozzle 100 that may occur during long-term use, thereby achieving the purpose of prolonging the service life of the oil nozzle 100.
[0043] Optionally, the thickness of the lip 320 along the axial direction of the sealing element 300 is 1 / 3-1 / 2 of the thickness of the sealing body 310.
[0044] It can be understood that the thickness of the lip 320 is too small, which will affect the sealing effect between the seal 300 and the oil nozzle 100; the thickness of the lip 320 is too large, which can cause excessive installation stress and damage the structure of the oil nozzle 100. Exemplarily, the thickness of the lip 320 can be 1 / 2, 1 / 3 or 1 / 4 of the thickness of the sealing body 310, and the specific value can be determined according to the actual working condition and material characteristics. In the embodiment, the lip 320 is located at the upper part of the inner circle of the sealing body 310, that is, the upper surface of the lip 310 is flush with the upper surface of the sealing body 310, and in other embodiments, the lip 310 can also be located at the middle or lower part of the inner circle of the sealing body 310, which can be set according to the use requirement.
[0045] Further, the side of the lip 320 away from the cap 200 is connected to the inner wall of the sealing body 310 in a round corner transition (B in the middle). Figure 2
[0046] The round corner design can effectively disperse stress and prevent damage of the seal 300 caused by stress concentration, thereby effectively prolonging the service life of the seal 300. The radius of the round corner can be optimized according to the material and thickness of the seal 300 to ensure that the seal 300 still maintains excellent sealing performance in a high-temperature and high-pressure environment.
[0047] Further, the side of the seal 300 contacting the cap 200 is provided with a first sealing protrusion 330, and the first sealing protrusion 330 is arranged along the circumference of the seal 300.
[0048] The first sealing protrusion 330 is an annular structure concentrically arranged with the sealing body 310, which ensures the uniformity of stress. By arranging the first sealing protrusion 330, the first sealing protrusion 330 is tightly attached to the cap 200 after the seal 300 is installed, thereby forming a good sealing effect.
[0049] Further, the cross section of the first sealing protrusion 330 is semicircular.
[0050] The semicircular protrusion is easy to deform under the action of compression force, which ensures that the contact surface with the cap 200 is fully attached, thereby enhancing the sealing performance. The semicircular design can also effectively disperse the pressure and avoid local stress concentration, thereby prolonging the service life of the seal 300.
[0051] Further, the bushing 400 includes a first sleeve part 410, a second sleeve part 420 and a connecting part 430, the first sleeve part 410 and the sleeve part are coaxially arranged and connected through the connecting part 430, the inner diameter of the first sleeve part 410 is larger than that of the second sleeve part 420, the connecting part 430 is in sealing contact with the side of the seal 300 away from the cap 200, the first cavity 401 is located in the inside of the first sleeve part 410, and the second cavity 402 is located in the inside of the second sleeve part 420.
[0052] Through this design, the bushing 400 can effectively support the oil nozzle 100, prevent it from displacement in high temperature and high pressure environment, and ensure the precision and stability of oil injection. At the same time, the sealing contact between the connecting part 430 and the sealing piece 300 further improves the sealing performance of the overall structure, reduces the risk of fuel leakage, and ensures the efficient operation and long-term reliability of the engine. Optionally, the bushing 400 is made of high-strength heat-resistant alloy to ensure structural stability under extreme working conditions, further improving the overall performance and safety of the engine.
[0053] Further, the sealing piece 300 is provided with a second sealing protrusion 340 on the side in contact with the connecting part 430, and the second sealing protrusion 340 is arranged along the circumference of the sealing piece 300.
[0054] Optionally, the second sealing protrusion 340 is an annular structure concentrically arranged with the sealing piece 300 to ensure uniformity of stress. By arranging the second sealing protrusion 340, the second sealing protrusion 340 is tightly attached to the connecting part 430 after the sealing piece 300 is installed, forming a good sealing effect.
[0055] Further, the cross section of the second sealing protrusion 340 is semicircular. The semicircular protrusion is easy to deform under the action of compression force, so as to ensure full attachment to the contact surface of the cap 200 and enhance the sealing performance. The semicircular design can also effectively disperse pressure and avoid local stress concentration, prolonging the service life of the sealing piece 300. Optionally, the second sealing protrusion 340 and the first sealing protrusion 330 are symmetrically arranged.
[0056] Further, the technical solution also provides an engine, which comprises a cylinder head 500 and the oil nozzle assembly in the above-mentioned embodiments, and the cylinder head 500 is sleeved on the bushing 400.
[0057] The oil injector assembly is tightly connected with the cylinder head 500 through the bushing 400, ensuring the stability and sealing performance of the overall structure and effectively improving the working efficiency and durability of the engine. The installation process of the oil injector assembly is simple and efficient, without changing the structure of the original bushing 400, and only the sealing piece 300 needs to be placed between the oil nozzle 100 and the cap 200. By using the engine provided by the technical solution, the sealing piece 300 can effectively block the combustion products from entering the gap between the cap 200 and the oil nozzle 100, thereby avoiding the contact between the shoulder part 110 of the oil nozzle 100 and the high-temperature combustion products, effectively preventing the shoulder part 110 from cracking, and further ensuring the engine has good stability and a long service life. This installation method not only simplifies the operation process, but also greatly improves the reliability of the engine, ensuring the performance under various working conditions. In addition, this design also reduces the maintenance cost, because the use of the sealing piece 300 can prolong the replacement cycle of the oil nozzle 100 and the cap 200, thereby reducing the long-term operating cost.
[0058] Further, the technical solution also provides a vehicle comprising the engine in the above-mentioned embodiments.
[0059] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A fuel injector assembly, characterized in that, include: Injector body; A fuel injector (100) is disposed at the oil outlet end of the fuel injector body. The fuel injector (100) includes a shoulder (110) and an oil injection end (120) connected to the shoulder (110). A bushing (400) is fitted around the outer periphery of the injector (100). The bushing (400) defines a first cavity (401) and a second cavity (402) that are connected. The second cavity (402) is located on the side of the first cavity (401) away from the injector body. The shoulder portion (110) is located inside the first cavity (401). Along the direction from the first cavity (401) to the second cavity (402), the injection end (120) protrudes from the shoulder portion (110) to the outside of the second cavity (402). A tightening cap (200) is disposed inside the first cavity (401) and sleeved on the oil injection end (120), the oil injection end (120) extending out from the tightening cap (200); A sealing element (300) is disposed in the first cavity (401). The sealing element (300) is sleeved on the fuel injection end (120). The sealing element (300) abuts against the end of the fastening cap (200) away from the fuel injector body and is configured to prevent combustibles from entering the first cavity (401) from the second cavity (402).
2. The injector assembly according to claim 1, characterized in that, The seal (300) includes a sealing body (310) and a lip (320), the lip (320) being disposed along the inner ring of the sealing body (310), and the inner ring of the lip (320) being in sealing contact with the outer wall of the fuel injector (100).
3. The injector assembly according to claim 2, characterized in that, Along the axial direction of the seal (300), the thickness of the lip (320) is 1 / 3 to 1 / 2 of the thickness of the sealing body (310).
4. The injector assembly according to claim 2, characterized in that, The side of the lip (320) facing away from the cap (200) is connected to the inner wall of the sealing body (310) with a rounded corner.
5. The injector assembly according to any one of claims 1-4, characterized in that, The sealing element (300) has a first sealing protrusion (330) on the side that contacts the tight cap (200), and the first sealing protrusion (330) extends circumferentially along the sealing element (300).
6. The injector assembly according to claim 5, characterized in that, The first sealing protrusion (330) has a semi-circular cross section.
7. The injector assembly according to any one of claims 1-4, characterized in that, The bushing (400) includes a first socket (410), a second socket (420), and a connecting portion (430). The first socket (410) and the socket are coaxially arranged and connected by the connecting portion (430). The inner diameter of the first socket (410) is larger than the inner diameter of the second socket (420). The connecting portion (430) and the sealing member (300) are in sealing contact on the side away from the tight cap (200). The first cavity (401) is located inside the first socket (410), and the second cavity (402) is located inside the second socket (420).
8. The injector assembly according to claim 7, characterized in that, The sealing element (300) has a second sealing protrusion (340) on the side that contacts the connecting portion (430), and the second sealing protrusion (340) extends circumferentially along the sealing element (300).
9. An engine, characterized in that, Includes a cylinder head (500) and an injector assembly according to any one of claims 1-8, wherein the cylinder head (500) is fitted onto the bushing (400).
10. A vehicle, characterized in that, Including the engine according to claim 9.