Cylinder sleeve of horizontally opposed engine, horizontally opposed engine and vehicle
The cylinder liner for horizontally opposed engines addresses uneven oil distribution by employing a non-uniform mesh structure with varying angles and densities, enhancing oil storage and reducing wear and consumption.
Patent Information
- Application Number
- CN202420560777.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The existing cylinder liner design for horizontally opposed engines results in uneven lubricating oil distribution due to gravity, leading to poor lubrication of the piston and piston ring, wear issues, and high oil consumption on the lower side.
A cylinder liner with a non-uniform mesh structure along the circumferential direction, featuring varying mesh angles and densities in different regions, with the upper area having a greater angle and density than the lower area, optimizing oil distribution and storage capacity.
Uniform circumferential oil distribution is achieved, reducing wear on the upper piston and piston ring and lowering oil consumption on the lower side, thereby improving engine performance.
Smart Images
Figure CN222184943U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a cylinder sleeve of a horizontally opposed engine and the horizontally opposed engine. Background Art
[0002] The horizontally opposed engine is a type of engine layout in which the cylinders are changed from vertical to horizontal, which lowers the center of gravity of the engine and makes the vehicle more stable and maneuverable.
[0003] The cylinder block hole of the engine has a cylinder liner, and the inner wall of the cylinder liner adopts a honing mesh (cylinder liner mesh) design. The existing cylinder liner mesh design is evenly distributed throughout the cylinder liner, and this design can meet the design requirements for in-line engines and V-type engines. However, for horizontally opposed engines, the cylinder liner is placed horizontally, and the lubricating oil between the piston and the cylinder liner is more likely to flow to the lower side due to gravity, resulting in uneven distribution of the lubricating oil. It is difficult to store oil in the upper cylinder liner, and the lubrication of the piston and piston ring becomes worse. The oil storage on the lower side increases, and the oil scraping ability of the piston ring is required to be improved, otherwise it will cause high oil consumption. Therefore, the existing cylinder liner honing mesh uniformity design cannot meet the requirements of horizontally opposed engines. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide a cylinder liner of a horizontally opposed engine to solve the problem of wear of the upper piston and piston ring and high oil consumption on the lower side caused by uneven oil distribution in the horizontally placed cylinder liner.
[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:
[0006] A cylinder liner of a horizontally opposed engine, wherein the inner wall surface of the cylinder liner is provided with a cylinder liner reticulation, wherein the cylinder liner reticulation is formed by the intersection of two groups of parallel lines in a rhombus arrangement, wherein the intersection angle of the two groups of parallel lines along the axial direction of the cylinder liner is a reticulation angle; along the circumferential direction of the cylinder liner, the inner wall surface is divided into at least an upper area and a lower area, wherein the reticulation angle of the cylinder liner reticulation in the upper area is greater than the reticulation angle of the cylinder liner reticulation in the lower area, and the density of the cylinder liner reticulation in the upper area is higher than the density of the cylinder liner reticulation in the lower area.
[0007] Optionally, along the circumferential direction of the cylinder liner, the inner wall surface is divided into four regions, including an upper region, a middle region and a lower region, and the middle region is located between the upper region and the lower region, wherein there are two middle regions, and the two middle regions are located on the left and right sides of the inner wall surface.
[0008] Optionally, the reticulation angle of the cylinder liner reticulation in the upper region is greater than the reticulation angle of the cylinder liner reticulation in the middle region, and the reticulation angle of the cylinder liner reticulation in the middle region is greater than the reticulation angle of the cylinder liner reticulation in the lower region.
[0009] Optionally, the reticulation angle of the cylinder liner reticulation in the upper region is 120°≤α<180°, the reticulation angle of the cylinder liner reticulation in the middle region is 40°≤α≤80°, and the reticulation angle of the cylinder liner reticulation in the lower region is 0°<α≤30°.
[0010] Optionally, the density of the cylinder liner reticulation in the upper region is higher than that in the middle region, and the density of the cylinder liner reticulation in the middle region is higher than that in the lower region.
[0011] Optionally, the roughness of the cylinder liner reticulation in the upper region is greater than the roughness of the cylinder liner reticulation in the middle region, and the roughness of the cylinder liner reticulation in the middle region is greater than the roughness of the cylinder liner reticulation in the lower region.
[0012] Optionally, the average valley depth of the roughness profile in the upper region is 2-4 microns, the average valley depth of the roughness profile in the middle region is 1-3 microns, and the average valley depth of the roughness profile in the lower region is 0.3-1.5 microns.
[0013] Optionally, the cylinder liner texture is a honing texture.
[0014] An embodiment of the utility model further provides a horizontally opposed engine, comprising the cylinder liner of the horizontally opposed engine as described above.
[0015] An embodiment of the utility model further provides a vehicle, comprising the horizontally opposed engine as described above.
[0016] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:
[0017] The cylinder liner of the utility model is specially used for horizontally opposed engines, that is, in the scenario where the cylinder liner is arranged horizontally. The cylinder liner inner wall surface is honed in different zones along the circumferential direction, and different mesh angles are designed, that is, a non-uniform mesh structure is set along the circumferential direction of the cylinder liner, and each part adopts a different mesh angle and density. Among them, the mesh angle of the cylinder liner mesh in the upper area is greater than the mesh angle of the cylinder liner mesh in the lower area, and the density of the cylinder liner mesh in the upper area is higher than the density of the cylinder liner mesh in the lower area. The circumferential lubricating oil distribution of the cylinder liner is optimized, the oil storage capacity of the upper part of the cylinder liner is improved, and the engine oil in the lower part of the cylinder liner is reduced, so as to achieve uniform circumferential engine oil distribution of the cylinder liner, and solve the problems of wear of the upper piston and piston ring and high engine oil consumption on the lower side caused by uneven distribution of lubricating oil on the inner wall of the cylinder liner due to gravity.
[0018] Additional advantages of the present invention will be given in the following description, and some will become apparent from the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0020] Figure 1 It is a schematic diagram of a circumferential cross section of a cylinder sleeve provided by an embodiment of the utility model;
[0021] Figure 2 It is a schematic diagram of the inner wall surface of the cylinder sleeve provided by the embodiment of the utility model;
[0022] Figure 3 It is a schematic diagram of the cylinder sleeve mesh provided by the embodiment of the utility model;
[0023] In the figure: 1, cylinder liner; 2, inner wall surface; 3, upper area; 4, middle area; 5, lower area;
[0024] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION
[0025] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0026] Terminology explanation:
[0027] Horizontally opposed engine: The engine pistons are evenly distributed on both sides of the crankshaft and move left and right in the horizontal direction. This reduces the overall height of the engine, shortens the length, and lowers the center of gravity of the vehicle, making the vehicle run more smoothly. The engine is installed on the center line of the vehicle, and the torques generated by the pistons on both sides offset each other, greatly reducing the vibration of the vehicle during driving, greatly increasing the engine speed, and reducing noise. The biggest advantage of the horizontally opposed engine is its low center of gravity. Since its cylinders are "flat", it not only lowers the center of gravity of the car, but also allows the front of the car to be designed to be flat and low. These factors can enhance the driving stability of the car. At the same time, the horizontally opposed cylinder layout is a symmetrical and stable structure, which makes the engine run smoother than a V-type engine and minimizes power loss during operation.
[0028] Cylinder liner: It is a cylindrical part, placed in the cylinder hole of the engine body, and fixed by the cylinder head. The piston reciprocates in its inner hole, and is cooled by cooling water outside. The cylinder liner, cylinder head and piston together form the cylinder working space. The cylinder liner of the cylindrical piston diesel engine bears the side thrust of the piston and becomes the guide of the reciprocating motion of the piston.
[0029] Cylinder liner reticulation: In order to reduce the friction between the cylinder liner and the piston and piston ring, the cylinder liner adopts a honing reticulation design. The reticulation grooves can enhance the oil storage capacity. The reticulation angle α and the density of the reticulation affect the lubrication of the cylinder liner and the piston and piston ring, as well as the stability of the oil film on the cylinder hole surface and the oil consumption, which in turn affects the life of the engine cylinder liner and the engine performance.
[0030] As mentioned in the background technology, in a horizontally opposed engine, since the cylinder liner is arranged horizontally, the lubricating oil is unevenly distributed on the inner circumferential wall surface. The difficulty in storing oil on the upper side will lead to poor lubrication of the piston and piston ring, resulting in wear problems. Excessive oil on the lower side and insufficient oil scraping ability of the oil ring will lead to high oil consumption, carbon deposition and other problems. In order to solve the above technical problems, the utility model proposes a cylinder liner for a horizontally opposed engine.
[0031] like Figure 1 As shown, in one embodiment of the utility model, a cylinder liner 1 of a horizontally opposed engine is proposed, wherein the inner wall surface 2 of the cylinder liner 1 has a cylinder liner mesh pattern, wherein the cylinder liner mesh pattern is formed by two groups of parallel lines crossing to form a diamond arrangement, and the intersection angle of the two groups of parallel lines along the axial direction of the cylinder liner 1 is the mesh angle a, such as Figure 3 shown.
[0032] Along the circumferential direction of the cylinder liner 1, the inner wall surface 2 is divided into at least an upper area 3 and a lower area 5, wherein the reticulation angle of the cylinder liner in the upper area 3 is greater than the reticulation angle of the cylinder liner in the lower area 5, and the density of the cylinder liner in the upper area 3 is higher than the density of the cylinder liner in the lower area 5.
[0033] The cylinder liner 1 of the utility model is specially used for horizontally opposed engines, that is, in the scenario where the cylinder liner 1 is arranged horizontally. The inner wall surface 2 of the cylinder liner 1 is honed in different zones along the circumferential direction, and different mesh angles are designed, that is, a non-uniform mesh structure is set along the circumferential direction of the cylinder liner 1, and each part adopts a different mesh angle and density. Among them, the mesh angle of the cylinder liner mesh in the upper area 3 is greater than the mesh angle of the cylinder liner mesh in the lower area 5, and the density of the cylinder liner mesh in the upper area 3 is higher than the density of the cylinder liner mesh in the lower area 5. The circumferential lubricating oil distribution of the cylinder liner 1 is optimized, the oil storage capacity of the upper part of the cylinder liner 1 is improved, and the engine oil in the lower part of the cylinder liner 1 is reduced, so as to achieve uniform circumferential engine oil distribution of the cylinder liner 1, and solve the problems of wear of the upper piston and piston ring and high engine oil consumption on the lower side caused by uneven distribution of lubricating oil on the inner wall of the cylinder liner 1 due to gravity.
[0034] In a preferred embodiment, along the circumferential direction of the cylinder liner 1, the inner wall surface 2 is divided into four regions, such as Figure 1 As shown, it includes an upper area 3, a middle area 4 and a lower area 5, wherein the middle area 4 is located between the upper area 3 and the lower area 5, wherein there are two middle areas 4, and the two middle areas 4 are located on the left and right sides of the inner wall surface 2. Different mesh structures are designed according to the requirements of different areas, and the cylinder liner 1 is divided into 4 parts in the circumferential direction, and each part adopts a different mesh angle and density.
[0035] like Figure 2 As shown, Figure 1 The expanded view in FIG. 1 shows an example of a cylinder liner 1, wherein the transverse direction is the axial direction of the inner wall surface 2 of the cylinder liner 1, and the longitudinal direction is the circumferential direction of the inner wall surface 2 of the cylinder liner 1. Figure 2 It can be seen that the mesh angle of the cylinder liner mesh in the upper area 3 is greater than the mesh angle of the cylinder liner mesh in the middle area 4, and the mesh angle of the cylinder liner mesh in the middle area 4 is greater than the mesh angle of the cylinder liner mesh in the lower area 5. For the upper part of the cylinder liner 1, the mesh angle α is large, the number of mesh grooves under the same cross section is large, and the oil storage capacity of the cylinder liner 1 is improved. For the lower part of the cylinder liner 1, the mesh angle α is small, the number of mesh grooves under the same cross section is small, and the oil storage capacity of the cylinder liner 1 is poor. When the piston ring moves downward, the oil is taken away in time, so as to solve the problem of uneven distribution of lubricating oil on the inner wall of the cylinder liner 1 due to gravity.
[0036] Specifically, the reticulation angle of the cylinder liner reticulation in the upper area 3 is 120°≤α<180°, the reticulation angle of the cylinder liner reticulation in the middle area 4 is 40°≤α≤80°, and the reticulation angle of the cylinder liner reticulation in the lower area 5 is 0°<α≤30°.
[0037] On the other hand, the density of the cylinder liner patterns in the upper region 3 is higher than that in the middle region 4, and the density of the cylinder liner patterns in the middle region 4 is higher than that in the lower region 5. The density of the cylinder liner patterns here refers to the number of patterns per unit length in the circumferential direction of the inner wall surface 2. The design of the pattern angle and density of the cylinder liner patterns avoids the problems of wear of the upper piston and piston ring and high oil consumption on the lower side.
[0038] Of course, it is understandable that the inner wall surface 2 of the cylinder liner 1 can also be divided into more areas. The overall principle is that the reticulation angle of the cylinder liner in the upper area is greater than the reticulation angle of the cylinder liner in the lower area, and the density of the cylinder liner in the upper area is higher than the density of the cylinder liner in the lower area. By setting more partitions, each area can be adapted more finely.
[0039] In addition, due to the horizontal placement of the cylinder liner 1 and the effect of the piston's own gravity, the piston has different degrees of friction with the cylinder liner 1 at the upper and lower parts during horizontal reciprocating movement, resulting in different wear on the upper and lower inner wall surfaces 2 of the cylinder liner 1.
[0040] In the present invention, in addition to the regional design of the mesh angle, the roughness of the cylinder liner mesh can also be controlled in different regions. Specifically, the roughness of the cylinder liner mesh in the upper region 3 is greater than the roughness of the cylinder liner mesh in the middle region 4, and the roughness of the cylinder liner mesh in the middle region 4 is greater than the roughness of the cylinder liner mesh in the lower region 5. Specifically, the average valley depth (Rvk) of the roughness profile of the upper region 3 is 2-4 microns, the average valley depth of the roughness profile of the middle region 4 is 1-3 microns, and the average valley depth of the roughness profile of the lower region 5 is 0.3-1.5 microns. By designing different roughnesses for different regions in the circumferential direction of the cylinder liner 1, balancing the wear conditions of the upper and lower sides, and affecting the oil storage capacity of the mesh, the Rvk value of the upper part of the cylinder liner 1 is appropriately increased, and the Rvk value of the lower part of the cylinder liner 1 is appropriately reduced, thereby ensuring that the circumferential oil distribution of the cylinder liner 1 is uniform.
[0041] Based on the above cylinder liner 1, the utility model also proposes a horizontally opposed engine. Considering the problem of uneven distribution of lubricating oil due to gravity after the cylinder liner 1 is placed horizontally, the cylinder liner 1 is divided into regions and a reticular structure is designed to optimize the circumferential distribution of lubricating oil in the cylinder liner 1, improve the oil storage capacity of the upper part of the cylinder liner 1, and reduce the oil in the lower part of the cylinder liner 1, so as to achieve uniform circumferential distribution of oil in the cylinder liner 1 and solve the problems of wear of the piston and piston ring and high oil consumption.
[0042] Based on the above-mentioned horizontally opposed engine, an embodiment of the utility model also provides a vehicle, in which the horizontally opposed engine described in the above-mentioned embodiment is arranged. Since the above-mentioned horizontally opposed engine has the above-mentioned technical effect, the technical effect of the vehicle using the horizontally opposed engine please refer to the above-mentioned embodiment.
[0043] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.
Claims
1. A cylinder liner of a horizontally opposed engine, It is characterized in that The inner wall surface of the cylinder liner is provided with a cylinder liner mesh pattern, wherein the cylinder liner mesh pattern is formed by the intersection of two groups of parallel lines in a diamond-shaped arrangement, and the intersection angle of the two groups of parallel lines along the axial direction of the cylinder liner is the mesh pattern angle; Along the circumferential direction of the cylinder liner, the inner wall surface is divided into at least an upper area and a lower area, wherein the reticulation angle of the cylinder liner in the upper area is greater than the reticulation angle of the cylinder liner in the lower area, and the density of the cylinder liner in the upper area is higher than the density of the cylinder liner in the lower area.
2. The cylinder liner of the horizontally opposed engine according to claim 1, It is characterized in that Along the circumferential direction of the cylinder liner, the inner wall surface is divided into four areas, including an upper area, a middle area and a lower area, and the middle area is located between the upper area and the lower area, wherein there are two middle areas, and the two middle areas are located on the left and right sides of the inner wall surface.
3. The cylinder liner of the horizontally opposed engine according to claim 2, It is characterized in that The reticulation angle of the cylinder liner reticulation in the upper region is greater than the reticulation angle of the cylinder liner reticulation in the middle region, and the reticulation angle of the cylinder liner reticulation in the middle region is greater than the reticulation angle of the cylinder liner reticulation in the lower region.
4. The cylinder liner of the horizontally opposed engine according to claim 3, It is characterized in that The reticulation angle of the cylinder liner reticulation in the upper region is 120°≤α<180°, the reticulation angle of the cylinder liner reticulation in the middle region is 40°≤α≤80°, and the reticulation angle of the cylinder liner reticulation in the lower region is 0°<α≤30°.
5. The cylinder liner of the horizontally opposed engine according to claim 2, It is characterized in that The density of the cylinder liner reticulation in the upper region is higher than that in the middle region, and the density of the cylinder liner reticulation in the middle region is higher than that in the lower region.
6. The cylinder liner of the horizontally opposed engine according to claim 2, It is characterized in that The roughness of the cylinder liner mesh texture in the upper region is greater than the roughness of the cylinder liner mesh texture in the middle region, and the roughness of the cylinder liner mesh texture in the middle region is greater than the roughness of the cylinder liner mesh texture in the lower region.
7. The cylinder liner of the horizontally opposed engine according to claim 6, It is characterized in that The average valley depth of the roughness profile in the upper region is 2-4 microns, the average valley depth of the roughness profile in the middle region is 1-3 microns, and the average valley depth of the roughness profile in the lower region is 0.3-1.5 microns.
8. The cylinder liner of the horizontally opposed engine according to claim 1, It is characterized in that The cylinder liner reticulation is a honing reticulation.
9. A horizontally opposed engine, It is characterized in that A cylinder liner of a horizontally opposed engine comprising any one of claims 1-8.
10. A vehicle, It is characterized in that Comprising the horizontally opposed engine as claimed in claim 9.