Cylinder sleeve, horizontally opposed engine and vehicle

Abstract

The utility model relates to the technical field of engine cylinders, in particular to a cylinder sleeve, a horizontally-opposed engine and a vehicle. A through hole is formed in the side wall of the cylinder sleeve; the through hole is configured in the mode that when the cylinder sleeve is installed in an engine and the piston moves to the end close to a crankshaft, the end, facing the piston, of the through hole can communicate with an oil ring arranged on the piston. The piston effect of the upper side wall face of the inner wall of the piston cavity of the horizontally opposed engine can be improved, and then the service life of the horizontally opposed engine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cylinders, in particular to a cylinder sleeve, a horizontally opposed engine and a vehicle. Background Art

[0002] The horizontally opposed engine is a unique automobile engine layout. It is a reciprocating piston internal combustion engine that uses a crank-connecting rod mechanism for movement. It has four strokes: intake, compression, power and exhaust.

[0003] Although the existing horizontally opposed engine is lower than the in-line engine, which reduces the height of the engine, saves space, and brings better NVH performance, it also brings some defects. For example, since the cylinder of the horizontally opposed engine is arranged horizontally, the lubricating oil on the upper side of the inner wall of the cylinder will flow downward under the action of gravity, resulting in uneven lubrication around the inner wall of the cylinder, and then causing uneven wear, especially when the main thrust surface is on the upper wall of the cylinder, the wear will be more serious, and may even cause cylinder pulling problems. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a cylinder liner, a horizontally opposed engine and a vehicle, which improve the lubrication effect of the upper side wall of the inner wall of the piston cavity of the horizontally opposed engine, can avoid or reduce the problem of wear and even cylinder pulling on the inner wall of the piston cavity, and further improve the service life of the horizontally opposed engine.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a cylinder liner, wherein a through hole is provided on the side wall of the cylinder liner; the through hole is configured so that when the cylinder liner is installed in the engine and the piston moves to a position close to one end of the crankshaft, the end of the through hole facing the piston can be connected to an oil ring provided on the piston.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides a horizontally opposed engine, including a casing, a cylinder liner, a piston and a crankshaft; a crankcase is provided inside the casing; the cylinder liner is arranged in the casing and a piston cavity is formed in the cylinder liner; the piston is accommodated in the piston cavity and can perform piston movement in the piston cavity; the crankshaft is arranged in the casing and is connected to the piston through a connecting rod; an oil hole communicating with the inner cavity of the crankcase is provided on the upper side of the inner wall of the casing, and the oil hole is connected with a through hole on the cylinder liner; the oil hole is configured so that when the piston moves close to one end of the crankshaft, the oil hole can communicate with an oil ring provided on the piston through the through hole.

[0007] In an optional embodiment of the utility model, an air ring is arranged on the side of the outer circumferential surface of the piston away from the crankshaft; the through hole is arranged on the side of the air ring close to the crankshaft;

[0008] The through hole is configured such that when the piston moves close to one end of the crankshaft, the through hole is aligned with the oil ring toward one end of the piston.

[0009] In an optional embodiment of the present invention, the crankcase includes an extension cavity extending to the upper side of the cylinder liner, and a guide surface is provided in the extension cavity, and the guide surface is configured to guide part of the lubricating oil in the crankcase into the oil hole.

[0010] In an optional embodiment of the utility model, a cylinder hole honing pattern is provided on the inner wall of the piston cavity.

[0011] In an optional embodiment of the present invention, the cylinder bore honing pattern is a bidirectionally crossed platform pattern, and the angle of the bidirectionally crossed platform pattern in the direction of the central axis of the cylinder liner is between 30° and 70°.

[0012] In an optional embodiment of the utility model, the oil hole and the through hole are coaxially arranged, and the oil hole is formed by a straight line from the outer side of the casing to the cylinder sleeve, and one end of the oil hole leading to the outside of the casing is blocked by a blocking member.

[0013] In an optional embodiment of the present invention, the oil hole is arranged along the radial direction of the casing.

[0014] In an optional embodiment of the present invention, the casing and the cylinder sleeve are integrally formed.

[0015] In order to achieve the above-mentioned object and other related objects, the utility model provides a vehicle including the horizontally opposed engine.

[0016] In summary, the utility model provides a through hole on the cylinder sleeve, and the through hole is provided at one end of the piston movement stroke close to the crankshaft. When the piston moves to one end close to the crankshaft, the end of the through hole facing the piston can be connected with the oil ring provided on the piston. On the one hand, the through hole on the cylinder sleeve can increase the lubricating oil retention amount on the upper side of the inner wall of the piston cavity. On the other hand, when the horizontally opposed engine is working, part of the splashing lubricating oil in the crankcase can splash into the through hole, and under the action of the lubricating oil tension, the lubricating oil can be stored in the through hole. At the same time, when the piston moves toward the crankshaft direction, part of the oil ring Partial lubricating oil can also be stored in these through holes. When the piston moves away from the crankshaft, the oil ring can bring out part of the lubricating oil in the through hole and evenly lubricate it to the upper wall surface of the inner wall of the piston cavity, which can effectively form a lubricating oil film, thereby improving the lubrication effect of the upper wall surface of the inner wall of the piston cavity of the horizontally opposed engine, avoiding the problems of poor lubrication, severe wear and even cylinder pulling on the upper side of the inner wall of the piston cavity. By increasing the through holes with negligible processing costs, the service life of the horizontally opposed engine can be greatly improved and the maintenance cost can be reduced. It has high economic value and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the cylinder sleeve of the utility model assembled in the casing;

[0019] Figure 2 This is a schematic diagram of the cylinder sleeve structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the local structure of the horizontally opposed engine of the utility model;

[0021] Figure 4 for Figure 3 Sectional view at AA;

[0022] Figure 5 It is a structural schematic diagram of the cylinder bore honing reticulation of the utility model before improvement;

[0023] Figure 6 It is a schematic diagram of the improved structure of the cylinder hole honing net of the utility model;

[0024] Explanation of component numbers: casing 1, oil hole 10, crankcase 11, extension chamber 111, guide surface 1111, cooling water channel 12, cylinder liner 2, piston chamber 21, through hole 22, cylinder bore honing pattern 23, sealing member 24, piston 3, air ring 31, oil ring 32, crankshaft 4, connecting rod 41. DETAILED DESCRIPTION

[0025] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0026] See also Figures 1 to 6 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0027] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

[0028] The horizontally opposed engine has the following advantages: low vibration. Since the cylinders are arranged 180° symmetrically and move like boxers, they cancel each other's vibrations. Therefore, the horizontally opposed engine vibrates less during operation; fast response. The horizontally arranged cylinders push each other to do work, which makes the engine speed increase faster and the responsiveness of medium and low speed movements is better; low center of gravity. The low center of gravity design of the horizontally opposed engine can improve the vehicle's handling and balance, especially when driving at high speeds and in curves; good heat dissipation. There is a certain gap between the engine cylinders, which can provide better heat dissipation and reduce heat accumulation during engine operation.

[0029] The internal structure of the horizontally opposed engine mainly includes a casing 1, a piston 3, a connecting rod 41, a crankshaft 4, a cylinder liner 2, a timing drive mechanism and a lubrication system; the casing 1 may include a body, a cylinder head, a cylinder head cover, a cylinder liner, a main bearing cover and an oil pan and other parts or structures. Of course, some structures may be adjusted according to actual needs. The cylinder head is used to close the top of the piston cavity 21, and together with the top of the piston 3 and the inner cavity of the cylinder liner 2, forms a combustion chamber; the cylinder head cover is used to cover the cylinder head to protect the valve mechanism, and is also a component of the engine timing system; the cylinder liner is located between the cylinder head and the body to ensure sealing and prevent coolant and gas leakage; the main bearing cover is used to support the crankshaft 4, ensuring that the crankshaft 4 rotates stably inside the engine body; the oil pan is located at the bottom of the engine, collecting and storing lubricating oil, and also plays a sealing role; the piston 3 and connecting rod 41 are responsible for converting the pressure generated by combustion into the rotational power of the crankshaft 4; the crankshaft 4 is the main rotating component of the engine, and the crankshaft 4 converts the reciprocating motion of the piston 3 into rotational motion and outputs power; the cylinder liner 2 is used to accommodate the movement of the piston 3 and forms a combustion chamber together with the cylinder head; the timing drive mechanism is responsible for ensuring the synchronization of the movements of various components inside the engine, such as the coordinated work between the camshaft and the crankshaft 4; the function of the lubrication system is to reduce the friction between the internal components of the engine and extend the service life of the engine.

[0030] See also Figure 1-2 The utility model provides a cylinder liner 2, and a through hole 22 is provided on the side wall of the cylinder liner 2; the through hole 22 is configured so that when the cylinder liner 2 is installed in the engine and the piston 3 moves to one end close to the crankshaft 4, the end of the through hole 22 facing the piston 3 can be connected with the oil ring 32 provided on the piston 3.

[0031] It should be noted that the engine is a horizontally opposed engine. It should be understood that other types of engines can also be engines of this type if they need the cylinder liner 2 of this case. The cylinder liner 2 of the engine is generally a cylindrical part, which is used to be installed in the engine casing 1. The internal cavity of the cylinder liner 2 forms a part of the piston cavity 21 and is pressed and fixed by the cylinder head; the cylinder liner 2 is mainly used to form the working space of the cylinder together with the cylinder head and the piston 3, which is a part of the engine combustion chamber and the place where the piston 3 reciprocates. When the piston 3 described in this case moves to one end close to the crankshaft 4, the through hole 22 facing the end of the piston 3 can be connected with the oil ring 32 provided on the piston 3. The connection here can be complete connection or partial connection of the through hole 22 with the oil ring 32. Since the amount of lubricating oil on the upper side of the inner wall of the piston chamber 21 of the horizontally opposed engine is small and it is not easy to store lubricating oil, the inner wall of the upper side of the piston chamber 21 has serious problems of poor lubrication and severe wear, especially when the main thrust surface is on the inner wall of the upper side of the piston chamber 21, the wear will be more serious, and even cause cylinder pulling problems; therefore, in this case, a through hole 22 is provided on the cylinder liner 2. When the cylinder liner 2 is installed in the engine, and the through hole 22 is provided at the end of the piston 3 movement stroke close to the crankshaft 4, and when the piston 3 moves to the end close to the crankshaft 4, the end of the through hole 22 facing the piston 3 can be connected with the oil ring 32 provided on the piston 3, so that the through hole 22 can be blocked when the piston 3 moves to the end close to the crankshaft 4, so that the horizontally opposed engine can be operated. During operation, part of the splashing lubricating oil in the crankcase 11 can be directly stored in the through hole 22. At the same time, when the piston 3 moves toward the crankshaft 4, the lubricating oil on the oil ring 32 can also be stored in these through holes 22, and under the action of the lubricating oil tension, at least part of the lubricating oil can be retained in these through holes 22 to a certain extent. When the piston 3 moves in the direction away from the crankshaft 4, the oil ring 32 can bring out part of the lubricating oil in the through hole 22 and evenly lubricate it to the upper side wall surface of the inner wall of the piston cavity 21, which can effectively form a lubricating oil film, thereby achieving a lubrication effect, thereby improving the lubrication effect of the upper side wall surface of the inner wall of the piston cavity 21 of the horizontally opposed engine, and can avoid or reduce the problem of wear and even cylinder pulling on the inner wall of the piston cavity 21, and further improve the service life of the horizontally opposed engine.

[0032] See also Figure 1-4The utility model also provides a horizontally opposed engine, comprising a casing 1, a cylinder liner 2, a piston 3 and a crankshaft 4; a crankcase 11 is provided in the casing 1; the cylinder liner 2 is provided in the casing 1 and a piston cavity 21 is formed in the cylinder liner 2; the piston 3 is accommodated in the piston cavity 21 and can perform piston movement in the piston cavity 21; the crankshaft 4 is provided in the casing 1 and is transmission-connected to the piston 3 through a connecting rod 41; a connecting rod 41 is provided on the upper side of the inner wall of the casing 1 The oil hole 10 is connected to the inner cavity of the crankcase 11, and the oil hole 10 is connected to the through hole 22 on the cylinder liner 2; the oil hole 10 is configured so that when the piston 3 moves to a position close to one end of the crankshaft 4, the end of the oil hole 10 toward the piston 3 can be connected to the oil ring 32 provided on the piston 3 through the through hole 22, so that when the piston 3 moves to a position close to one end of the crankshaft 4, the end of the oil hole 10 toward the piston cavity 21 can be blocked by the piston 3.

[0033] It should be noted that the casing 1 is the basic frame of the engine, supporting the crank-connecting rod mechanism, the valve mechanism and the assembly base of the main components of each system of the engine; the cylinder liner 2 is arranged in the cylinder body and forms at least a part of the piston cavity 21 in the cylinder body; the outer circumferential surface of the cylinder liner 2 is provided with a through hole 22 leading to the inner cavity of the cylinder liner 2; the upper side of the inner wall of the piston cavity 21 mainly refers to the upper side of the cylinder liner 2 when it is placed horizontally. In this case, by arranging a crankcase 11 in the casing 1 and arranging an oil hole 10 connected to the inner cavity of the crankcase 11 on the upper side of the inner wall of the piston cavity 21, when the piston 3 moves to one end close to the crankshaft 4, for example, when the piston 3 moves to the limit point close to one end of the crankshaft 4, the through hole 22 connected to the oil hole 10 is just blocked by the piston 3 toward the end of the piston 3, and the through hole 22 is connected with the oil ring 32, so that the lubricating oil in the oil hole 10 can lubricate the radial upper end of the piston 3, thereby improving the lubrication effect of the upper inner wall of the piston cavity 21, reducing the failure rate, and reducing the maintenance cost of the engine. More specifically, when the horizontally opposed engine is working, part of the splashed lubricating oil in the crankcase 11 can be directly stored in the oil hole 10 and the through hole 22. At the same time, when the piston 3 moves toward the crankshaft 4, the lubricating oil on the oil ring 32 can also be stored in these oil holes 10 and the through hole 22, and under the action of the tension of the lubricating oil, at least part of the lubricating oil can be retained in these oil holes 10 and the through hole 22. When the piston 3 moves in the direction away from the crankshaft 4, the oil ring 32 can bring out part of the lubricating oil in the through hole 22 and evenly lubricate it to the upper side wall surface of the inner wall of the piston cavity 21, and the oil hole 10 can also supply lubricating oil to the through hole 22. Through the coordinated use of the oil hole 10, the through hole 22 and the oil ring 32, a lubricating oil film can be effectively formed between the piston 3 and the piston cavity 21, thereby achieving a lubrication effect, thereby improving the lubrication effect of the upper side wall surface of the inner wall of the piston cavity 21 of the horizontally opposed engine, and can avoid or reduce the problem of wear and even cylinder pulling on the inner wall of the piston cavity 21, further improving the service life of the horizontally opposed engine.

[0034] Furthermore, a cooling water path 12 is also provided in the casing 1, and the cooling water path 12 is located outside the cylinder liner 2.

[0035] See also Figure 1 As one of the optional embodiments of the utility model, an air ring 31 is provided on the side of the outer circumferential surface of the piston 3 away from the crankshaft 4; when the cylinder liner 2 is installed in the engine, the through hole 22 is provided on the side of the air ring 31 close to the crankshaft 4.

[0036] It should be noted that the air ring 31 on the piston 3 is a sealing device installed on the outer circumferential surface of the piston 3. The main function of the air ring 31 is to ensure the seal between the piston 3 and the piston cavity 21 to prevent the leakage of compressed air and fuel gas in the combustion chamber; the air ring 31 is usually made of metal or other wear-resistant materials, which can effectively reduce the friction and wear of the piston 3 in the piston cavity 21, while maintaining the air pressure and sealing performance in the piston cavity 21; the air ring 31 on the piston 3 plays an important role in equipment such as engines and compressors, and can improve the efficiency and performance of the equipment. The number of air rings 31 on the piston 3 can be set according to actual needs. Generally, two air rings 31 are set. It should be understood that one air ring 31 or more than three air rings 31 can also be set according to actual needs, but the through hole 22 is always set on the side of all air rings 31 close to the crankshaft 4, so as to avoid the through hole 22 affecting the sealing of the air ring 31, thereby avoiding gas leakage in the combustion chamber in the piston cavity 21.

[0037] See also Figure 1 As one optional embodiment of the present invention, an oil ring 32 is provided beside the gas ring 31 of the piston 3; the oil ring 32 is provided on a side of the gas ring 31 close to the crankshaft 4;

[0038] The through hole 22 is configured such that when the piston 3 moves close to one end of the crankshaft 4 , the through hole 22 is aligned with the oil ring 32 toward one end of the piston 3 .

[0039] It should be noted that the oil ring 32 is a type of piston ring, and is a sealing device installed in the ring groove of the piston 3. It contacts the inner wall of the piston cavity 21 and plays the role of sealing the combustion chamber. The main function of the oil ring 32 is to scrape off the excess lubricating oil on the inner wall of the piston cavity 21, ensuring that a layer of appropriate lubricating oil film is left on the inner wall of the piston cavity 21, which can not only protect the inner wall of the piston cavity 21, but also prevent excessive lubricating oil from entering the combustion chamber, and avoid the combustion of lubricating oil to produce carbon deposits and other harmful substances. The oil ring 32 is made of metal or other wear-resistant materials, which can effectively reduce the friction and wear of the piston 3 in the piston cavity 21, while maintaining the lubrication and sealing performance in the piston cavity 21. The oil ring 32 can improve the efficiency of the equipment and extend its service life. In this case, when the piston 3 moves to one end close to the crankshaft 4, the end of the through hole 22 facing the piston 3 is aligned with the oil ring 32. It should be understood that as long as the piston 3 moves close to one end of the crankshaft 4, it can be ensured that the lubricating oil in the through hole 22 will not directly flow into the combustion chamber on the other side of the piston 3; of course, when the piston 3 moves close to the extreme end of the crankshaft 4, at this time, the end of the through hole 22 facing the piston 3 is just aligned with the oil ring 32, which can make the lubricating oil in the through hole 22 more fully enter the oil ring 32 and be scraped by the oil ring 32. It should be understood that the lubricating oil in the through hole 22 can enter both sides of the oil ring 32, so that the oil ring 32 can fully and evenly distribute the lubricating oil provided by the through hole 22 to the upper inner wall surface of the piston cavity 21, effectively forming a lubricating oil film, making up for the problem of lack of lubricating oil on the upper inner wall of the piston cavity 21, thereby solving the problem of wear on the upper inner wall of the piston cavity 21 and the problem of cylinder pulling.

[0040] See also Figure 1 , 3 4. As one of the optional embodiments of the present invention, the crankcase 11 includes an extension cavity 111 extending to the upper side of the cylinder liner 2, and a guide surface 1111 is provided in the extension cavity 111. The guide surface 1111 is configured to guide part of the lubricating oil in the crankcase 11 into the oil hole 10.

[0041] It should be noted that the extension cavity 111 is located on the upper side of the outer wall of the cylinder liner 2, and the cavity in the crankcase 11 is used to arrange the crankshaft 4 and the connecting rod 41; the lubricating oil in the engine is mainly transported to various friction surfaces through an oil pump for pressure lubrication; at the same time, a part of the lubricating oil is thrown to the inner wall of the piston cavity 21, the crankcase 11 and other parts that need lubrication by the centrifugal force generated by the high-speed rotation of various components when the engine is running, such as the balance block of the crankshaft 4. The crankcase 11 is connected to the oil pan, and part of the splashed lubricating oil can splash into the extension cavity 111 and enter the upper side of the inner wall of the piston cavity 21 through the oil hole 10 connected to the extension cavity 111, thereby achieving the purpose of lubrication. The guide surface 1111 can be, for example, an arc-shaped inclined surface or a curved surface in the crankcase 11; by providing the guide surface 1111 in the extension cavity 111, more lubricating oil in the extension cavity 111 can enter the upper side of the inner wall of the piston cavity 21 through the oil hole 10 and the through hole 22 connected to the oil hole 10, thereby more fully ensuring the supply of lubricating oil on the upper side of the inner wall of the piston cavity 21.

[0042] See also Figure 5-6 As one optional embodiment of the present utility model, a cylinder hole honing pattern 23 is provided on the inner wall of the piston chamber 21 .

[0043] It should be noted that the cylinder bore honing pattern 23 is generally regularly arranged. The cylinder bore honing pattern 23 is a microstructure formed on the engine cylinder wall through a specific honing process, such as a pit structure. This structure can store lubricating oil and reduce the direct contact between the piston 3 and the inner wall of the piston chamber 21, thereby reducing wear, extending the service life of the engine, and improving its performance; secondly, during the honing process, materials such as diamond or silicon carbide sand strips are usually used to form a uniform cross pattern, such as a platform pattern, through different honing stages (such as fine honing and platform honing).

[0044] See also Figure 5-6 As one of the optional embodiments of the utility model, the cylinder bore honing pattern 23 is a bidirectional cross platform pattern, and the angle of the bidirectional cross platform pattern in the direction of the central axis of the cylinder sleeve 2 is between 30° and 70°. The cylinder bore honing pattern 23 is spread all over the inner wall of the piston cavity 21. Figure 5-6 The cylinder bore honing pattern 23 is only partially shown.

[0045] It should be noted that if Figure 5 FIG. 2 is a schematic diagram of the structure of the cylinder bore honing pattern 23 before improvement. Figure 5The cylinder bore honing pattern 23 is a partial illustration, and the cross-angle of the cylinder bore honing pattern 23 is between 30° and 70°. In a horizontally opposed engine, the small angle of the cylinder bore honing pattern 23 makes it easier for the lubricating oil to flow downward under the action of gravity, and the lubricating oil cannot be better stored. In the improved cylinder bore honing reticulation 23 of the present case, the angle of the bidirectionally crossed platform reticulation in the direction of the central axis of the cylinder liner 2 is between 30° and 70°, that is, the angle range of the reticulation crossing angle of the cylinder bore honing reticulation 23 is 110° to 150°, for example, the reticulation crossing angle of the cylinder bore honing reticulation 23 is 110° or 120° or 130° or 140° or 150°, so that in the horizontally opposed engine, the large-angle cylinder bore honing reticulation 23 can store more lubricating oil on the inner wall of the piston cavity 21, and cooperate with the arrangement of the oil hole 10 and the through hole 22, so as to better store more lubricating oil on the upper side of the piston cavity 21 of the horizontally opposed engine, effectively form a lubricating oil film, and can better solve the problem of wear of the upper side wall of the inner wall of the piston cavity 21, especially the problem of easy cylinder pulling when the upper side wall of the inner wall of the piston cavity 21 is used as the main thrust surface.

[0046] Furthermore, at least two groups of the oil holes 10 are provided, each group has at least one oil hole 10 , and each oil hole 10 corresponds to one through hole 22 .

[0047] See also Figure 3-4 As one of the optional embodiments of the utility model, the oil hole 10 and the through hole 22 are coaxially arranged, and the oil hole 10 is formed by a straight line from the outer side of the casing 1 to the cylinder sleeve 2, and one end of the oil hole 10 leading to the outside of the casing 1 is blocked by a blocking member 24.

[0048] It should be noted that the oil hole 10 and the through hole 22 can be formed together by machining, that is, the oil hole 10 and the through hole 22 are formed together by straightly penetrating from the outside of the casing 1 to the piston chamber 21 of the cylinder liner 2, and the part of the oil hole 10 that leads from the crankcase 11 to the outside of the casing 1 is a process hole, which is blocked by a sealing member 24. The sealing member 24 can be, for example, a steel ball or a bolt or a welding seal, as long as the purpose of being able to be used after blocking can be achieved, so that the oil hole 10 and the through hole 22 are processed by a drilling machine together, and the processing technology is simple, the cost is low, and the economic value is high.

[0049] In an optional embodiment of the present invention, the oil hole 10 is arranged along the radial direction of the housing 1, so as to facilitate the processing of the oil hole 10 and the through hole 22.

[0050] As one of the optional embodiments of the present invention, the casing 1 and the cylinder liner 2 are integrally formed. For example, when the casing 1 and the cylinder liner are cast with the same material, the casing 1 and the cylinder liner 2 can be integrally cast, and the piston chamber 21 can be processed after the casing 1 and the cylinder liner 2 are integrally cast.

[0051] See also Figure 3 The utility model also provides a vehicle, comprising the above-mentioned horizontally opposed engine. It should be noted that the vehicle having the horizontally opposed engine is within the protection scope of this case.

[0052] In the present case, through the cooperation of the oil hole 10, the through hole 22 and the cylinder bore honing pattern 23, more lubricating oil can be stored on the upper side of the inner wall of the piston cavity 21, thereby optimizing the lubrication effect between the piston cavity 21 and the piston 3, reducing friction and wear, and extending the service life of the engine. Through the setting of the oil hole 10 and the through hole 22, the lubricating oil can be directly applied between the piston cavity 21 and the piston 3 to form a uniform oil film, thereby reducing metal contact and frictional heat, thereby reducing wear and improving reliability; at the same time, the sealing performance of the engine can also be improved. By optimizing the position and direction of the oil hole 10 and the through hole 22, it can be ensured that the lubricating oil forms a stable oil film between the piston 3 and the inner wall of the piston cavity 21, thereby improving the sealing effect, reducing the possibility of air leakage and blowby, and helping to improve the compression ratio and combustion efficiency of the engine, and increasing power output.

[0053] The implementation cost of the solution in this case increases very little, and it is sufficient to process several oil holes 10 and through holes 22 at the same time, and the angle of the cylinder hole honing pattern 23 can be adjusted during production without increasing the cost. Both methods can better solve the problem of wear on the inner wall of the piston chamber 21.

[0054] In summary, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A cylinder liner, characterized in that: A through hole is provided on the side wall of the cylinder sleeve; The through hole is configured such that when the cylinder liner is installed in the engine and the piston moves close to one end of the crankshaft, one end of the through hole facing the piston can communicate with the oil ring provided on the piston.

2. A horizontally opposed engine, characterized in that: include: a casing, wherein a crankcase is arranged in the casing; The cylinder sleeve of claim 1 is disposed in the housing and a piston chamber is formed in the cylinder sleeve; A piston, received in the piston cavity and capable of performing piston motion in the piston cavity; A crankshaft, disposed in the casing and drivingly connected to the piston via a connecting rod; An oil hole communicating with the inner cavity of the crankcase is provided on the upper side of the inner wall of the casing; The oil hole is configured such that when the piston moves close to one end of the crankshaft, the oil hole can communicate with the oil ring provided on the piston through the through hole.

3. The horizontally opposed engine according to claim 2, characterized in that: An air ring is arranged on the side of the outer circumferential surface of the piston away from the crankshaft; the through hole is arranged on the side of the air ring close to the crankshaft; The through hole is configured such that when the piston moves close to one end of the crankshaft, the through hole is aligned with the oil ring toward one end of the piston.

4. The horizontally opposed engine according to claim 2, characterized in that: The crankcase includes an extension cavity extending to the upper side of the cylinder liner, and a guide surface is provided in the extension cavity. The guide surface is configured to guide part of the lubricating oil in the crankcase into the oil hole.

5. The horizontally opposed engine according to claim 2, characterized in that: The inner wall of the piston cavity is provided with a cylinder hole honing pattern.

6. The horizontally opposed engine according to claim 5, characterized in that: The cylinder bore honing pattern is a bidirectionally crossed platform pattern, and the angle of the bidirectionally crossed platform pattern in the direction of the central axis of the cylinder sleeve is between 30° and 70°.

7. The horizontally opposed engine according to claim 5, characterized in that: The oil hole and the through hole are coaxially arranged, and the oil hole is formed by straightly penetrating the outer side of the casing to the cylinder sleeve, and one end of the oil hole leading to the outside of the casing is blocked by a blocking member.

8. The horizontally opposed engine according to claim 7, characterized in that: The oil holes are arranged along the radial direction of the casing.

9. The horizontally opposed engine according to claim 2, characterized in that: The casing and the cylinder sleeve are integrally formed.

10. A vehicle, characterized in that: Including the horizontally opposed engine as described in any one of claims 2-9.

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