Oil injection advancer cover plate based on lattice structure and engine

Abstract

The utility model relates to the technical field of engine oil injection systems, in particular to an oil injection advancer cover plate based on a lattice structure and an engine. The oil injection advancer cover plate comprises a mounting seat and a top plate, a cavity is formed between the top plate and the mounting seat, and the cavity is filled with a lattice structure; the lattice structure is integrally a cylinder, the two ends of the cylinder lattice structure are provided with oblique angles, and the oblique angle at one end is arranged on the inner side plane of the top plate. The lattice structure design is introduced, and collaborative optimization of light weight and sound insulation performance is achieved on the premise that the mechanical strength and the sealing performance of the cover plate are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of engine fuel injection system technology, and in particular to a fuel injection advance cover plate and engine based on a dot matrix structure. Background Technology

[0002] As a key component of the engine's fuel injection system, the fuel injection advance cover plate primarily functions to: protect the fuel injection advance mechanism from dust, moisture, and other impurities, thereby extending its service life; provide good sealing performance to prevent fuel or oil leakage, ensuring the normal operation of the engine; and, through proper cover plate design, help reduce noise and vibration generated during the operation of the fuel injection advance mechanism, improving the overall vehicle comfort and quietness.

[0003] The utility model patent CN204200441U discloses an injection advance cover plate assembly, which solves the problem of strong local vibration and high radiation noise in diesel engines due to the proximity of gears to the injection advance cover plate and the complex excitation of the gear transmission system.

[0004] However, the cover plate still has the following technical problems:

[0005] ①Heavy weight: The cover plate and gasket are both solid structures with low material utilization, resulting in a high overall weight, which makes it difficult to meet the requirements of lightweight engine design.

[0006] ② Limited sound insulation effect: Solid structures have limited sound wave reflection and absorption capabilities, resulting in insufficient isolation of high-frequency noise and limited room for improvement in sound insulation performance. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this utility model embodiment is to provide a fuel injection advance cover plate based on a dot matrix structure. By introducing a dot matrix structure design, the lightweight and sound insulation performance are synergistically optimized while ensuring the mechanical strength and sealing performance of the cover plate.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A fuel injection advance cover plate based on a dot matrix structure includes a mounting base and a top plate, with a cavity between the top plate and the mounting base, the cavity being filled with a dot matrix structure; the dot matrix structure is a cylindrical body, with beveled angles at both ends of the cylindrical dot matrix structure, one of the beveled angles being arranged on the inner plane of the top plate.

[0010] Optionally, the bevels at both ends of the lattice structure are formed by cutting cylindrical bodies from the bottom and side surfaces of a cuboid.

[0011] Optionally, the center of the bottom surface of the cylindrical body coincides with the center of the bottom surface of the cuboid, and the axis of the cylindrical body forms a preset angle with the bottom surface of the cuboid.

[0012] Optionally, the bottom surface of the cuboid cuts the bottom and side surfaces of the cylindrical body, and the side surface of the cuboid cuts the top and side surfaces of the cylindrical body.

[0013] Optionally, the bevels at both ends of the lattice structure are symmetrical along the middle cross section of the cylinder.

[0014] Optionally, the lattice structure is arranged in a circular array along the center of the cavity, wherein the oblique angle of the lattice structure faces the center of the cavity, or the oblique angle of the lattice structure faces away from the center of the cavity.

[0015] Optionally, the dot matrix structure is arranged in a rectangular array, wherein the oblique angles of the dot matrix structure face the same direction, or the oblique angles of the dot matrix structure all face the central section of the cavity, or the oblique angles of the dot matrix structure all face away from the central section of the cavity.

[0016] Optionally, the cavity is filled with at least two lattice structures.

[0017] Optionally, one type of lattice structure is a cylindrical body with beveled ends, and another type of lattice structure is a Hexagonalhoneycomb structure, a Diamond structure, or a Gyroid structure.

[0018] This utility model embodiment also provides an engine, including the fuel injection advance cover plate based on the dot matrix structure as described above.

[0019] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0020] In this fuel injection advance cover, a cavity exists between the top plate and the mounting base. This cavity is filled with a lattice structure, achieving a lightweight design. The lattice structure is a cylindrical body with beveled ends, one of which is located on the inner plane of the top plate. This design not only reduces the weight of the cover but also distributes the load through the geometric characteristics of the lattice structure, ensuring the cover's load-bearing capacity and stability. Furthermore, the introduction of the lattice structure improves the cover's sound insulation, as its porous structure effectively absorbs and isolates sound energy, thereby reducing noise generated during engine operation. This structural design, while ensuring functionality, meets the modern engine's demands for lightweight design and high performance.

[0021] Additional advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. Furthermore, the spacing or dimensions between components are exaggerated to show their positions; the schematic diagrams are for illustrative purposes only.

[0023] Figure 1 This is a schematic diagram of the cover plate with an unfilled dot matrix structure provided in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the formation of the lattice structure provided in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram showing the relative positions of the cylindrical body and the cuboid provided in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the cover plate with a filled dot matrix structure provided in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the dot matrix structure arrangement provided in an embodiment of this utility model;

[0028] Figure 6 These are schematic diagrams of various dot matrix structures provided in embodiments of this utility model;

[0029] Figure 7 This is a comparison diagram of the transmission loss of various lattice structures provided in the embodiments of this utility model;

[0030] In the diagram: 1. Mounting base; 2. Top plate; 3. Cavity; 4. Cylindrical body; 5. Angled angle; Detailed Implementation

[0031] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Terminology Explanation

[0033] (1) Lattice structure: a porous structure composed of a large number of identical or similar lattice units through periodic combination.

[0034] (2) Metal 3D printing: This is an advanced manufacturing technology, also known as metal additive manufacturing. It creates complex metal parts and components by stacking metal materials layer by layer. This technology can be directly used for the rapid prototyping of metal parts, and has the ability to manufacture complex shapes and structures, improve production efficiency and reduce costs, as well as advantages such as customized production and personalized services.

[0035] (3) Transmission loss: Transmission loss is a physical quantity that measures the ability of a material or structure to insulate sound. It is defined as the ratio of incident sound energy to transmitted sound energy, and the unit is (dB). The larger the value of transmission loss, the less sound energy is transmitted, and the stronger the sound insulation ability of the material or structure.

[0036] Example 1

[0037] like Figure 1 As shown, the fuel injection advance cover includes a mounting base 1 and a top plate 2, with a cavity 3 between the top plate 2 and the mounting base 1. The cavity 3 is filled with a dot matrix structure (such as... Figure 4 (as shown); Figure 2 The diagram shows a single dot matrix structure. The dot matrix structure is a cylindrical body 4, with beveled angles 5 at both ends. One beveled angle 5 is located on the inner plane of the top plate 2. Figure 5 The diagram shown is a schematic of multiple dot matrix structures being filled.

[0038] This lattice structure achieves lightweighting through the hollow nature of the cylindrical body 4 and the design of the beveled angle 5. Simultaneously, the porosity of the lattice enhances sound wave scattering, improving sound insulation performance. The fitting design of the beveled angle 5 with the top plate 2 optimizes the load transfer path within the cavity 3, avoiding stress concentration and ensuring structural stability. In alternative solutions, the filling area of ​​the lattice structure can be either a cover plate or a gasket, but the cavity 3 between the top plate 2 and the mounting base 1 is preferred for achieving uniform support.

[0039] In other embodiments, the gasket can also be used as a weight-reduction component. The weight relationship of the fuel injection advance cover plate before and after weight reduction satisfies the following formula: m(after weight reduction) ≥ 10% * m(before weight reduction). For example, the cover plate body can be selected as the weight-reduction component. The existing cross-shaped reinforcing rib solid structure that provides support is removed. A plane parallel to the bottom is drawn through the highest point of the cross-shaped structure, and this plane extends to the bottom of the thinned cover plate as a dot matrix filling area. By replacing part of the solid area with a dot matrix structure to reduce weight, the porous characteristics of the dot matrix are used to distribute the load and improve structural stability. At the same time, the sound wave scattering and absorption capabilities are enhanced by adjusting the geometric parameters of the dot matrix units, thereby further improving the sound insulation effect while reducing the weight of the cover plate.

[0040] like Figure 2As shown, the bevel angles 5 at both ends of the lattice structure are formed by cutting the cylindrical body 4 from the bottom and side surfaces of the cuboid respectively. Through Boolean operations, the cylindrical body 4 is cut to form a regular bevel angle 5 geometry, enabling the lattice units to be densely arranged in the cavity 3 and reducing material redundancy. The bevel angle 5 cutting method can adapt to different installation space requirements. For example, an inclination angle of 5 degrees affects the porosity of the lattice units, thereby regulating the sound insulation frequency band.

[0041] Furthermore, the center of the bottom surface of the cylindrical body 4 coincides with the center of the bottom surface of the cuboid, and the axis of the cylindrical body 4 forms a preset angle with the bottom surface of the cuboid.

[0042] By aligning the center of the bottom surface of the cylindrical body 4 with the center of the bottom surface of the cuboid, the uniform distribution of the lattice structure inside the cover plate is ensured, thus improving the overall stability and bearing capacity of the cover plate. At the same time, the axis of the cylindrical body 4 forms a preset angle with the bottom surface of the cuboid, which enables the lattice structure to provide better support and sound insulation effect in a specific direction. This angle setting can be adjusted according to the actual application scenario to optimize the performance of the cover plate.

[0043] The bottom surface of the cuboid cuts the bottom and side surfaces of the cylindrical body 4, and the side surface of the cuboid cuts the top and side surfaces of the cylindrical body 4. This cutting method ensures the precise matching of the geometric shape of the lattice structure with the internal space of the cover plate. The bevel angle 5 formed in this way not only enhances the stability of the lattice structure but also optimizes its distribution inside the cover plate. In addition, this cutting method can be adjusted according to actual needs to adapt to different cover plate designs and performance requirements.

[0044] The bevel angles 5 at both ends of the lattice structure are symmetric about the middle cross-section of the cylindrical body 4. This symmetric design ensures the uniform distribution of the lattice structure inside the cover plate, thus improving the overall stability and bearing capacity of the cover plate. Compared with the asymmetric structure, the symmetric bevel angle 5 can reduce the risk of vibration mode coupling and further suppress noise radiation.

[0045] The formation of the lattice structure is as Figure 3 shown. Construct two cylinders, ensure that the center points of the two cylinders are the same, the radius of cylinder one (R1) < the radius of cylinder two (R2), perform Boolean operations to obtain a hollow cylinder, adjust its orientation, and obtain a preset basic lattice unit by restricting the boundary with the cuboid bounding box. The parameter settings are as follows: the center of the bottom surface of the cylinder coincides with the center of the bottom surface of the cuboid (point o), the maximum diameter of the cylinder 2R1 ≤ the minimum side length of the cuboid min(a, b), the included angle between the midline of the cylinder and the cuboid is α, 30° ≤ α ≤ 70°. In this implementation case, the side lengths of the cuboid a = side length b = 10 mm, the radius of cylinder one R1 = 5 mm, the radius of cylinder two R2 = 3.5 mm, and α = 45°.

[0046] The lattice structure is arranged in a circular array along the center of the cavity 3, wherein the oblique angle 5 of the lattice structure faces towards the center of the cavity 3, or the oblique angle 5 of the lattice structure faces away from the center of the cavity 3. This circular array arrangement ensures that the lattice structure is evenly distributed inside the cover plate, thereby improving the overall stability and load-bearing capacity of the cover plate. The orientation of the oblique angle 5 can be adjusted according to actual needs to optimize the mechanical and acoustic performance of the cover plate. For example, an oblique angle 5 facing towards the center of the cavity 3 can enhance the support capacity of the central area of ​​the cover plate, while an oblique angle 5 facing away from the center of the cavity 3 can optimize the performance of the edge area of ​​the cover plate.

[0047] In another embodiment, the dot matrix structure is arranged in a rectangular array, wherein the oblique angles 5 of the dot matrix structure face the same direction, or the oblique angles 5 of the dot matrix structure all face the central section of the cavity 3, or the oblique angles 5 of the dot matrix structure all face away from the central section of the cavity 3.

[0048] This rectangular array arrangement ensures a uniform distribution of the lattice structure within the cover plate, thereby improving the overall stability and load-bearing capacity of the cover plate. Different orientations of the oblique angle 5 can be selected based on the specific application scenario to optimize the cover plate's performance. For example, having the oblique angle 5 oriented in the same direction can form a directional load transfer channel, enhancing the cover plate's support capacity in a specific direction, while facing or away from the center section of cavity 3 can optimize acoustic impedance matching and expand the sound insulation bandwidth.

[0049] Optionally, the cavity 3 is filled with at least two types of lattice structures. This design optimizes the performance of the cover plate by combining different types of lattice structures. For example, one lattice structure can provide better support performance, while another can enhance sound insulation. By rationally selecting and combining different types of lattice structures, a balance can be achieved between lightweight and high performance. This multi-lattice structure design not only improves the overall performance of the cover plate but also provides greater flexibility in cover plate design.

[0050] like Figure 6 As shown, one type of lattice structure is a cylindrical body 4 with oblique angles 5 at both ends (hereinafter referred to as lattice structure A), and the other type of lattice structure can be a conventional lattice structure such as a Hexagonal honeycomb structure, a Diamond structure, or a Gyroid structure.

[0051] Hexagonal honeycomb offers high specific stiffness, making it suitable for cover edge support areas; the Diamond structure exhibits excellent isotropy, making it suitable for multi-directional load areas; and the Gyroid's continuous curved surface design enhances sound wave scattering. By combining the cylindrical body 4 with the above structures, for example, using the cylindrical body 4 for the main load-bearing area and the Gyroid for the sound insulation area, the overall performance can be synergistically improved.

[0052] The fill rate of the lattice structure is selected from 10% to 70% to ensure that the final weight reduction meets the preset requirements; for example, lattice structure A with a fill rate of 29%, Hexagonal honeycomb lattice structure with a fill rate of 30%, Gyroid lattice structure with a fill rate of 20%, and Diamond lattice structure with a fill rate of 30%.

[0053] After determining the lattice structure at the specified fill rate (10%-70%), the lattice structure-filled fuel injection advance cover plate model is obtained by combining it with the filled fuel injection advance cover plate structure. For example, the fuel injection advance cover plate model obtained by filling with lattice structure A at a 29% fill rate is shown below. Figure 4 .

[0054] Based on the performance requirements of the fuel injection advance mechanism structural components, a forming method that meets these requirements is selected, including but not limited to casting and metal additive manufacturing. For example, metal additive manufacturing is used to print a fuel injection advance mechanism cover plate filled with a lattice structure, resulting in a sound insulation test piece of the fuel injection advance mechanism cover plate containing 29% lattice structure A and 29% Gyroid lattice structure.

[0055] By replacing part of the solid portion at the bottom of the injector cover with a dot matrix structure, the weight reduction requirement for the injector cover can be achieved to a certain extent. In addition, the addition of the dot matrix structure can effectively distribute and bear the load, ensuring its load-bearing capacity and providing stable support for the object. For example, in this embodiment, the solid portion at the bottom of the original injector advance cover is thinned (original thickness 4mm, reduced by 0.5mm), and the solid structure of the bottom cross reinforcing rib is removed. A plane parallel to the bottom is drawn through the highest point of the cross reinforcing rib solid structure, and this plane to the thinned bottom area of ​​the cover is filled with 29% dot matrix structure A. The resulting injector advance cover is 13g lighter than the original structure and 3g lighter than the 29% Gyroid dot matrix structure, as detailed in Table 1.

[0056] Table 1. Comparison of the weight of the injection advance cover plate with the original structure and the 29% dot matrix structure A filling.

[0057] Two types of fuel injection advance cover plates weight Original structure 200g 29% lattice structure A filling 187g 29% Gyroid Filler 190g

[0058] In addition, the dot matrix structure improves the sound insulation of the fuel injection advance cover plate while reducing weight. According to the example, the sound insulation test results of the cover plate specimen filled with dot matrix structure A with a 29% filling rate are better than those of the unfilled cover plate specimen and the 29% Gyroid filling specimen, as detailed in Table 2.

[0059] Table 2 Comparison of sound insulation test results for fuel injection advance cover plate

[0060] Two types of fuel injection advance cover plates Sound insulation test results Original structure 31.2 dBA 29% lattice structure A filling 33.5 dBA 29% Gyroid Filler 30.7 dBA

[0061] As shown in the table above and Figure 7 As shown, a 29% fill rate dot matrix structure A was selected to cover the thinned fuel injection advance cover. The sound insulation test results showed that the sound insulation after introducing the dot matrix structure was 33.5 dBA, the sound insulation of the original structure was 31.2 dBA, and the sound insulation of the 29% Gyroid filler was 30.7 dBA. The improvement effect was significant compared with the original structure and the 29% Gyroid dot matrix structure.

[0062] Example 2

[0063] This embodiment proposes an engine, including a fuel injection advance cover plate based on a dot matrix structure as described in Embodiment 1.

[0064] The lightweight characteristics of the dot matrix structure reduce the overall weight of the engine, which helps improve fuel efficiency; optimized sound insulation performance reduces engine noise radiation and improves the overall NVH performance of the vehicle. In addition, the stable support capability of the dot matrix structure can extend the service life of the fuel injection advance mechanism and reduce maintenance costs.

[0065] Overall, this invention, while taking into account both reducing the radiated noise of the fuel injection advance cover and ensuring the stability of the component, can meet the engine's weight reduction requirements, provides a new solution for engine noise control, significantly improves the overall vehicle comfort, and is also of great significance for further improving engine performance.

[0066] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A fuel injection advance cover plate based on a dot matrix structure, characterized in that, The fuel injection advance cover plate includes a mounting base and a top plate, and there is a cavity between the top plate and the mounting base, the cavity being filled with a dot matrix structure; The dot matrix structure is a cylindrical body with beveled angles at both ends, one of which is located on the inner plane of the top plate.

2. The fuel injection advance cover plate based on a dot matrix structure as described in claim 1, characterized in that, The beveled corners at both ends of the lattice structure are formed by cutting cylindrical bodies from the bottom and side surfaces of a cuboid.

3. The fuel injection advance cover plate based on a dot matrix structure as described in claim 2, characterized in that, The center of the bottom surface of the cylindrical body coincides with the center of the bottom surface of the cuboid, and the axis of the cylindrical body forms a preset angle with the bottom surface of the cuboid.

4. The fuel injection advance cover plate based on a dot matrix structure as described in claim 3, characterized in that, The bottom surface of the cuboid cuts the bottom and side surfaces of the cylindrical body, and the side surface of the cuboid cuts the top and side surfaces of the cylindrical body.

5. The fuel injection advance cover plate based on a dot matrix structure as described in claim 4, characterized in that, The bevels at both ends of the lattice structure are symmetrical along the middle cross-section of the cylinder.

6. The fuel injection advance cover plate based on a dot matrix structure as described in claim 1, characterized in that, The dot matrix structure is arranged in a circular array along the center of the cavity, wherein the oblique angle of the dot matrix structure faces the center of the cavity, or the oblique angle of the dot matrix structure faces away from the center of the cavity.

7. The fuel injection advance cover plate based on a dot matrix structure as described in claim 1, characterized in that, The dot matrix structure is arranged in a rectangular array, wherein the oblique angles of the dot matrix structure face the same direction, or the oblique angles of the dot matrix structure all face the central section of the cavity, or the oblique angles of the dot matrix structure all face away from the central section of the cavity.

8. The fuel injection advance cover plate based on a dot matrix structure as described in claim 1, characterized in that, The cavity is filled with at least two lattice structures.

9. The fuel injection advance cover plate based on a dot matrix structure as described in claim 8, characterized in that, One type of lattice structure is a cylindrical body with beveled ends, while another type of lattice structure is a Hexagonal honeycomb structure, a Diamond structure, or a Gyroid structure.

10. An engine, characterized in that, Including the fuel injection advance cover plate based on a dot matrix structure as described in any one of claims 1-9.

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