CN222457585U - Cylinder sleeve, horizontally opposed engine and vehicle - Google Patents

Abstract

The utility model relates to the technical field of engine cylinders, and in particular to a cylinder liner, a horizontally opposed engine and a vehicle; 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 close to one end of the crankshaft, the end of the through hole facing the piston can be connected with an oil ring provided on the piston; the utility model can improve the piston effect of the side wall surface on the inner wall of the piston cavity of the horizontally opposed engine, thereby improving the service life of the horizontally opposed engine.

Description

Cylinder sleeve, horizontally opposed engine and vehicle

Technical Field

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

The horizontal opposed engine is a unique layout mode of automobile engine, belongs to reciprocating piston internal combustion engine, adopts crank-link mechanism to make motion, and has four strokes of air intake, compression, acting and exhaust.

The existing horizontal opposed engine has the defects that, although the height of the engine is lower than that of an in-line engine, the engine can be reduced in space, better NVH performance is brought, for example, because the cylinders of the horizontal opposed engine are horizontally arranged, lubricating oil on the upper side of the inner walls of the cylinders can flow downwards under the action of gravity, uneven lubrication around the inner walls of the cylinders is caused, uneven abrasion is caused, and particularly the abrasion of a main thrust surface on the upper side wall surface of the cylinders is more serious, and even the problem of cylinder pulling is caused.

Disclosure of utility model

In view of the above drawbacks of the prior art, an object of the present utility model is to provide a cylinder liner, a horizontally opposed engine and a vehicle, which can improve the lubrication effect of the side wall surface on the inner wall of the piston chamber of the horizontally opposed engine, avoid or reduce the problem of abrasion or even cylinder pulling on the inner wall of the piston chamber, and further improve the service life of the horizontally opposed engine.

To achieve the above and other related objects, the present utility model provides a cylinder liner having a through hole provided on a sidewall thereof, the through hole being configured such that an end of the through hole facing the piston is capable of communicating with an oil ring provided on the piston when the cylinder liner is installed in an engine and the piston moves to be close to an end of a crankshaft.

To achieve the above and other related objects, the present utility model provides a horizontally opposed engine including a casing, a cylinder liner, a piston, and a crankshaft, wherein a crankcase is provided therein, the cylinder liner is provided in the casing and a piston chamber is formed in the cylinder liner, the piston is accommodated in the piston chamber and is capable of performing a piston motion in the piston chamber, the crankshaft is provided in the casing and is in driving connection with the piston through a connecting rod, an oil hole communicating with an inner cavity of the crankcase is provided on an upper side of an inner wall of the casing, and communicates with a through hole on the cylinder liner, and the oil hole is configured such that, when the piston moves to be close to one end of the crankshaft, the oil hole communicates with an oil ring provided on the piston through the through hole.

In an alternative embodiment of the utility model, a gas ring is arranged on one side, far away from the crankshaft, of the outer circumferential surface of the piston, and the through hole is arranged on one side, close to the crankshaft, of the gas ring;

The through bore is configured such that an end of the through bore facing the piston is aligned with the oil ring when the piston moves to near the crankshaft end.

In an alternative embodiment of the utility model, the crankcase comprises an extension chamber extending to the upper side of the cylinder liner, wherein a guiding surface is arranged in the extension chamber, and the guiding surface is configured to guide part of the lubricating oil in the crankcase into the oil hole.

In an alternative embodiment of the utility model, cylinder bore honing patterns are provided on the inner wall of the piston chamber.

In an alternative embodiment of the utility model, the cylinder bore honing pattern is a bi-directional intersecting land pattern, and the included angle of the bi-directional intersecting land pattern in the direction of the central axis of the cylinder liner is between 30 and 70 degrees.

In an alternative embodiment of the present utility model, the oil hole and the through hole are coaxially arranged, the oil hole is formed by penetrating the outside of the casing to the cylinder sleeve in a straight line, and one end of the oil hole, which is led to the outside of the casing, is blocked by a blocking piece.

In an alternative embodiment of the present utility model, the oil hole is disposed along a radial direction of the casing.

In an alternative embodiment of the utility model, the casing is integrally formed with the cylinder liner.

To achieve the above and other related objects, the present utility model provides a vehicle including the horizontally opposed engine.

In summary, through the through holes are formed in the cylinder sleeve, and the through holes are formed at one end, close to the crankshaft, of the piston movement stroke, and when the piston moves to one end, close to the crankshaft, one end, facing the piston, of the through holes can be communicated with the oil ring arranged on the piston, on one hand, the through holes in the cylinder sleeve are formed to increase the lubricating oil holding quantity of the upper side wall surface of the inner wall of the piston cavity of the horizontally opposed engine, on the other hand, when the horizontally opposed engine works, part of splashed lubricating oil in the crankcase can splash into the through holes and can be stored in the through holes under the action of the lubricating oil tension, meanwhile, when the piston moves to the crankshaft direction, part of the lubricating oil on the oil ring can be stored in the through holes, and when the piston moves to the direction away from the crankshaft, part of the lubricating oil in the through holes can be carried out and uniformly lubricated to the upper side wall surface of the inner wall of the piston cavity, so that a lubricating oil film can be effectively formed, the lubricating effect of the upper side wall surface of the piston cavity of the horizontally opposed engine is improved, the problem that the upper side wall of the piston cavity of the horizontally opposed engine is poor, serious even the cylinder is avoided, the problem that the horizontally opposed engine is solved, the horizontally opposed through the increase of the processing cost can be ignored, the horizontally opposed through the through holes can be greatly improved, the service life of the opposed engine is prolonged, and the economical efficiency is high, the practical and the cost is reduced, and the practical, and the service cost is high.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a cylinder liner of the present utility model assembled in a housing;

FIG. 2 is a schematic view of a cylinder liner according to the present utility model;

FIG. 3 is a schematic view of a partial structure of a horizontally opposed engine of the present utility model;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is a schematic view of the cylinder bore honing screen of the present utility model prior to modification;

figure 6 is a schematic view of the improved cylinder bore honing net of the present utility model;

The reference numerals of the components are the casing 1, the oil hole 10, the crankcase 11, the extension chamber 111, the guide surface 1111, the cooling water channel 12, the cylinder liner 2, the piston chamber 21, the through hole 22, the cylinder hole honing screen 23, the plugging member 24, the piston 3, the gas ring 31, the oil ring 32, the crankshaft 4 and the connecting rod 41.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Please refer to fig. 1 to 6. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs and to which this utility model belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this utility model may be used to practice the utility model.

The horizontal opposed engine has the advantages that the vibration is small, the cylinders are symmetrically distributed at 180 degrees, and move like a boxer to offset the vibration, so that the horizontal opposed engine is small in vibration during operation, quick in response, the cylinders which are horizontally arranged push each other to do work, so that the engine is quick in rotating speed lifting, good in middle-low speed movement responsiveness, low in gravity center, and good in heat dissipation, the operability and balance of the vehicle can be improved due to the low gravity center design of the horizontal opposed engine, particularly, the vehicle is more obvious during high-speed running and curve driving, a certain gap is reserved between the cylinder bodies of the engine, a better heat dissipation effect can be provided, and heat accumulation during the engine operation process is reduced.

The internal structure of the horizontally opposed engine mainly comprises a shell 1, a piston 3, a connecting rod 41, a crankshaft 4, a cylinder sleeve 2, a timing driving mechanism, a lubricating system and the like, wherein the shell 1 can comprise parts or structures such as a machine body, a cylinder head cover, a cylinder liner, a main bearing cover, an oil pan and the like, of course, part of the structure can be adjusted according to actual requirements, the cylinder head is used for closing the top of a piston cavity 21 and forming a combustion chamber together with the top of the piston 3 and the inner cavity of the cylinder sleeve 2, the cylinder head cover is used for covering the cylinder head to protect a valve mechanism and also forms a part of an engine timing system, the cylinder liner is positioned between the cylinder head and the machine body and used for ensuring sealing, so that leakage of cooling liquid and gas is prevented, the main bearing cover is used for supporting the crankshaft 4 and ensuring stable rotation of the crankshaft 4 in the machine body, the oil pan is positioned at the bottommost part of the engine and is used for collecting and storing lubricating oil, meanwhile, the piston 3 and the connecting rod 41 are responsible for converting pressure generated by combustion into rotary power of the crankshaft 4, the crankshaft 4 is used as a main rotary part of the engine, the crankshaft 4 converts reciprocating motion of the piston 3 into rotary motion and outputs power, the cylinder liner 2 is used for accommodating the piston 3 and forming the motion together with the cylinder sleeve 3 and forming a part of the combustion chamber and the combustion chamber is responsible for the same as a synchronous action with the internal part of the camshaft, and the driving mechanism is used for reducing the friction and prolonging the service life of the internal part of the driving mechanism.

Referring to fig. 1-2, the present utility model provides a cylinder liner 2, wherein a through hole 22 is formed on a sidewall of the cylinder liner 2, and the through hole 22 is configured such that when the cylinder liner 2 is installed in an engine and a piston 3 moves to a position close to an end of a crankshaft 4, an end of the through hole 22 facing the piston 3 can communicate with an oil ring 32 provided on the piston 3.

It should be noted that the engine is a horizontally opposed engine, and it should be understood that other types of engines may be provided with the cylinder liner 2, and the cylinder liner 2 of the engine is a generally cylindrical part for being installed in the casing 1 of the engine, the internal cavity of the cylinder liner 2 forms a part of the piston cavity 21 and is tightly pressed and fixed by the cylinder head, and the cylinder liner 2 is mainly used for forming a working space of the cylinder together with the cylinder head and the piston 3, which is a part of a combustion chamber of the engine and is also a place where the piston 3 reciprocates. 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 communicated with the oil ring 32 arranged on the piston 3, and the communication can be complete communication or partial communication of the through hole 22 with the oil ring 32. The engine is characterized in that the through holes 22 are arranged on the cylinder sleeve 2, when the cylinder sleeve 2 is arranged in the engine, the through holes 22 are arranged corresponding to one end of the movement stroke of the piston 3, which is close to the crankshaft 4, and when the piston 3 moves to one end close to the crankshaft 4, one end of the through holes 22 facing the piston 3 can be communicated with the oil ring 32 arranged on the piston 3, so that the through holes 22 can be blocked when the piston 3 moves to one end close to the crankshaft 4, and therefore, when the horizontally opposed engine works, part of splashed lubricating oil in the crankcase 11 can be directly stored in the through holes 22, and simultaneously, when the piston 3 moves to the crankshaft 4, the lubricating oil on the oil ring 32 can also be stored in the through holes 22 and can be at least partially kept in the through holes under the action of the lubricating oil tension, and the part of the lubricating oil can be kept away from the inner wall 22 of the engine, so that the side wall of the piston 3 can be further prevented from being far away from the inner wall of the engine, and the side wall of the engine can be further reduced, and the side wall of the piston 21 can be further prevented from being horizontally opposed to the side wall of the engine, and the side wall of the piston 21 can be further improved, and the lubrication effect of the side wall of the piston can be further improved.

Referring to fig. 1-4, the utility model further provides a horizontally opposed engine, which comprises a casing 1, a cylinder sleeve 2, a piston 3 and a crankshaft 4, wherein a crank case 11 is arranged in the casing 1, the cylinder sleeve 2 is arranged in the casing 1, a piston cavity 21 is formed in the cylinder sleeve 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 arranged in the casing 1 and is in transmission connection with the piston 3 through a connecting rod 41, an oil hole 10 communicated with an inner cavity of the crank case 11 is arranged on the upper side of the inner wall of the casing 1, the oil hole 10 is communicated with a through hole 22 on the cylinder sleeve 2, and the oil hole 10 is configured such that when the piston 3 moves to be close to one end of the crankshaft 4, one end of the oil hole 10 facing the piston 3 can be communicated with an oil ring 32 arranged on the piston 3 through the through hole 22, so that when the piston 3 moves to be close to one end of the crankshaft 4, the oil hole 10 can be blocked by the piston 3 facing the piston cavity 21.

The shell 1 is a basic frame of an engine and is used for supporting an assembling matrix of a crank connecting rod mechanism, a valve mechanism and main parts of each system of the engine, the cylinder sleeve 2 is arranged in a cylinder body and at least forms a part of a piston cavity 21 in the cylinder body, a through hole 22 which is communicated with an inner cavity of the cylinder sleeve 2 is formed in the outer circumferential surface of the cylinder sleeve 2, and the upper side of the inner wall of the piston cavity 21 mainly refers to the upper side of the horizontally placed cylinder sleeve 2. This scheme is through being provided with crankcase 11 in casing 1 and set up the oilhole 10 with the inner chamber intercommunication of crankcase 11 in the inner wall upside of piston chamber 21, can make when piston 3 moves to the one end that is close to crankshaft 4, for example when piston 3 moves to the extreme point that is close to crankshaft 4 one end, the through-hole 22 that communicates with oilhole 10 is sealed off by piston 3 just towards the one end of piston 3, and realize the intercommunication of through-hole 22 and oil ring 32, realized the lubrication of oilhole 10 interior lubricating oil to the radial upper end of piston 3, thereby improve the lubrication effect of piston chamber 21 upside inner wall, the fault rate is reduced, the maintenance cost of engine has been reduced. More specifically, when the horizontally opposed engine is operated, part of the splashed lubricating oil in the crankcase 11 can be directly stored in the oil holes 10 and the through holes 22, and simultaneously, when the piston 3 moves towards the crankshaft 4, the lubricating oil on the oil ring 32 can also be stored in the oil holes 10 and the through holes 22, and at least part of the lubricating oil can be kept in the oil holes 10 and the through holes 22 under the action of tension, when the piston 3 moves away from the crankshaft 4, the oil ring 32 can carry out part of the lubricating oil in the through holes 22 and uniformly lubricate the upper side wall surface of the inner wall of the piston cavity 21, and the oil holes 10 can also supply the lubricating oil into the through holes 22, and through the cooperation of the oil holes 10, the through holes 22 and the oil ring 32, a lubricating oil film can be effectively formed between the piston 3 and the piston cavity 21, so that the lubricating effect is achieved, the lubricating effect of the upper side wall surface of the inner wall of the piston cavity 21 of the horizontally opposed engine is further improved, the problem that the inner wall of the piston cavity 21 is worn or even pulled is avoided or reduced, and the service life of the horizontally opposed engine is further improved.

Further, a cooling water channel 12 is further provided in the casing 1, and the cooling water channel 12 is located outside the cylinder liner 2.

Referring to fig. 1, as an alternative embodiment of the present utility model, a gas ring 31 is disposed on a side of the outer circumferential surface of the piston 3 away from the crankshaft 4, and when the cylinder liner 2 is installed in an engine, the through hole 22 is disposed on a side of the gas ring 31 close to the crankshaft 4.

It should be noted that the gas 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 gas ring 31 is to ensure the sealing between the piston 3 and the piston cavity 21 and prevent the leakage of compressed air and fuel gas in the combustion chamber, the gas ring 31 is usually made of metal or other wear-resistant materials, so that friction and abrasion of the piston 3 in the piston cavity 21 can be effectively reduced, and meanwhile, the gas pressure and sealing performance in the piston cavity 21 are maintained, the gas ring 31 on the piston 3 plays an important role in devices such as an engine and a compressor, so that the efficiency and performance of the devices can be improved, the number of the gas rings 31 on the piston 3 can be set according to actual requirements, and generally, the number of the gas rings 31 is two, but it should be understood that one gas ring 31 or more than three gas rings 31 can be set according to actual requirements, but the through holes 22 are always arranged on one side of all the gas rings 31 close to the crankshaft 4, so that the tightness of the gas ring 31 can be prevented from being influenced by the through holes 22, and the leakage of gas in the combustion chamber 21 can be avoided.

Referring to fig. 1, as an alternative embodiment of the present utility model, an oil ring 32 is disposed beside a gas ring 31 of the piston 3, wherein the oil ring 32 is disposed at one side of the gas ring 31 near the crankshaft 4;

The through-hole 22 is configured such that when the piston 3 moves to near the end of the crankshaft 4, the end of the through-hole 22 facing the piston 3 is aligned with the oil ring 32.

The oil ring 32 is a sealing device installed in the ring groove of the piston 3 and contacts with the inner wall of the piston cavity 21 to seal the combustion chamber, and the main function of the oil ring 32 is to scrape excessive lubricating oil on the inner wall of the piston cavity 21, ensure that a proper lubricating oil film is left on the inner wall of the piston cavity 21, protect the inner wall of the piston cavity 21 and prevent excessive lubricating oil from entering the combustion chamber, and avoid carbon deposition and other harmful substances generated by the combustion of the lubricating oil. While the oil ring 32 is made of metal or other wear-resistant material, friction and wear of the piston 3 in the piston chamber 21 can be effectively reduced, while lubrication and sealing performance in the piston chamber 21 are maintained, and the oil ring 32 can improve efficiency of the apparatus and prolong service life. In this case, when the piston 3 moves to the end close to the crankshaft 4, the end of the through hole 22 facing the piston 3 is aligned with the oil ring 32, and it should be understood that as long as the piston 3 moves to the end close to the crankshaft 4, it is ensured that the lubricating oil in the through hole 22 does not directly flow into the combustion chamber on the other side of the piston 3, and of course, when the piston 3 moves to the extreme end of the crankshaft 4, the end of the through hole 22 facing the piston 3 is just aligned with the oil ring 32, so that the lubricating oil in the through hole 22 can 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 into two sides of the oil ring 32, so that the oil ring 32 can fully uniformly disperse the lubricating oil provided by the through hole 22 to the upper inner wall surface of the piston cavity 21, so as to effectively form a lubricating oil film, solve the problem that the upper inner wall of the piston cavity 21 lacks lubricating oil, and solve the problem of abrasion of the upper side surface of the inner wall of the piston cavity 21 and the problem of cylinder pulling.

Referring to fig. 1, 3 and 4, as an alternative embodiment of the present utility model, the crankcase 11 includes an extension cavity 111 extending to the upper side of the cylinder liner 2, a guiding surface 1111 is disposed in the extension cavity 111, and the guiding surface 1111 is configured to guide a portion of the lubricating oil in the crankcase 11 into the oil hole 10.

The extending cavity 111 is located at the upper side of the outer side wall of the cylinder liner 2, the cavity in the crankcase 11 is used for arranging the crankshaft 4 and the connecting rod 41, lubricating oil in the engine is mainly conveyed to each friction surface through an engine oil pump to conduct pressure lubrication, meanwhile, part of the lubricating oil is subjected to centrifugal force generated by high-speed rotation of each component when the engine operates, such as a balancing weight of the crankshaft 4 is thrown to the inner wall of the piston cavity 21, the crankcase 11 and other parts needing lubrication, the crankcase 11 is communicated with the oil pan, part of the splashed lubricating oil can splash into the extending cavity 111, and the part of the splashed lubricating oil enters the upper side of the inner wall of the piston cavity 21 through the oil hole 10 communicated with the extending cavity 111, so that the purpose of lubrication is achieved. The guiding surface 1111 may be, for example, an arc-shaped inclined surface or a curved surface in the crankcase 11, and by providing the guiding surface 1111 in the extension chamber 111, more lubrication oil in the extension chamber 111 can enter the upper side of the inner wall of the piston chamber 21 through the oil hole 10 and the through hole 22 communicating with the oil hole 10, thereby more fully ensuring the supply of lubrication oil to the upper side of the inner wall of the piston chamber 21.

Referring to fig. 5-6, as an alternative embodiment of the present utility model, a cylinder bore honing screen 23 is provided on the inner wall of the piston chamber 21.

It should be noted that the cylinder bore honing screen 23 is generally arranged regularly, and the cylinder bore honing screen 23 is a microstructure formed on the cylinder wall of the engine by a specific honing process, for example, a pit structure, which can store lubricating oil, reduce direct contact between the piston 3 and the inner wall of the piston cavity 21, thereby reducing wear, prolonging the service life of the engine and improving the performance thereof, and secondly, in the honing process, diamond or silicon carbide sand strips and other materials are generally used, and uniform cross screens, such as platform screens, are formed by different honing stages (such as finish honing and platform honing).

Referring to fig. 5-6, as an alternative embodiment of the present utility model, the cylinder bore honing pattern 23 is a bi-directional cross-platform pattern, and the included angle of the bi-directional cross-platform pattern in the central axis direction of the cylinder liner 2 is between 30 ° and 70 °. The bore honing screen 23 is distributed throughout the inner wall of the piston chamber 21, the bore honing screen 23 of fig. 5-6 being shown only partially.

It should be noted that, as shown in fig. 5, the cylinder hole honing reticulate pattern 23 is a schematic structural diagram before improvement of the cylinder hole honing reticulate pattern 23 in this case, and the reticulate pattern crossing angle of the cylinder hole honing reticulate pattern 23 in fig. 5 is a partial schematic diagram, whereas in the horizontally opposed engine, the small-angle cylinder hole honing reticulate pattern 23 is easier to flow downwards under the action of gravity, and the lubricating oil cannot be stored better. The included angle of the cylinder hole honing reticulate patterns 23 after improvement in the scheme is between 30 and 70 degrees in the central axis direction of the cylinder sleeve 2, namely the range of the reticulate pattern crossing angle of the cylinder hole honing reticulate patterns 23 is 110 to 150 degrees, for example, the reticulate pattern crossing angle of the cylinder hole honing reticulate patterns 23 is 110 or 120 or 130 or 140 or 150 degrees, so that in a horizontally opposite engine, the large-angle cylinder hole honing reticulate patterns 23 can store more lubricating oil on the inner wall of the piston cavity 21, and can store more lubricating oil on the upper side of the piston cavity 21 of the horizontally opposite engine better by matching with the arrangement of the oil holes 10 and the through holes 22, so that a lubricating oil film is effectively formed, the problem of abrasion of the upper side wall surface of the inner wall of the piston cavity 21 can be better solved, and particularly, the problem of easy cylinder pulling when the upper side wall surface of the inner wall of the piston cavity 21 is used as a main thrust surface can be solved.

Further, at least two groups of 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.

Referring to fig. 3 to 4, as an alternative embodiment of the present utility model, the oil hole 10 and the through hole 22 are coaxially disposed, the oil hole 10 is formed by penetrating straight from the outside of the casing 1 to the cylinder liner 2, and an end of the oil hole 10 that is open to the outside of the casing 1 is blocked by a blocking member 24.

The oil hole 10 and the through hole 22 may be formed together by machining, that is, the oil hole 10 and the through hole 22 are formed by penetrating straight from the outer side of the casing 1 into the piston cavity 21 of the cylinder liner 2, and a part of the oil hole 10, which is led to the outer side of the casing 1 from the crankcase 11, is a process hole, and the process hole is blocked by the blocking member 24, and the blocking member 24 may be, for example, a steel ball, a bolt or a welding block, so long as the purpose of being able to be used after blocking can be achieved, thereby the oil hole 10 and the through hole 22 are machined together by a drilling machine, and the machining process is simple, the cost is low, and the economic value is high.

In an alternative embodiment of the present utility model, the oil hole 10 is provided in a radial direction of the casing 1, thereby facilitating the processing of the oil hole 10 and the through hole 22.

As an alternative embodiment of the present utility model, the casing 1 and the cylinder liner 2 are integrally formed, for example, when the casing 1 and the cylinder liner are cast from the same material, the casing 1 and the cylinder liner 2 may be integrally cast, and the piston cavity 21 may be machined after the casing 1 and the cylinder liner 2 are integrally cast.

Referring to fig. 3, the present utility model further provides a vehicle including the above-mentioned horizontally opposed engine. It should be noted that the vehicle with the horizontally opposed engine is within the scope of protection of the present case.

In the scheme, through the cooperation of the oil hole 10, the through hole 22 and the cylinder hole honing reticulation 23, more lubricating oil can be stored on the upper side of the inner wall of the piston cavity 21, the lubricating effect between the piston cavity 21 and the piston 3 is optimized, friction and abrasion are reduced, the service life of an engine is prolonged, through the arrangement of the oil hole 10 and the through hole 22, the lubricating oil can be directly coated between the piston cavity 21 and the piston 3 to form a uniform oil film, metal contact and friction heat are reduced, abrasion is reduced, reliability is improved, and meanwhile, the sealing performance of the engine is improved, the stable oil film is ensured to be formed between the piston 3 and the inner wall of the piston cavity 21 through optimizing the positions and directions of the oil hole 10 and the through hole 22, the sealing effect is improved, the possibility of air leakage and air channeling is reduced, the compression ratio and the combustion efficiency of the engine are improved, and the power output is increased.

The scheme of the scheme is little in implementation cost increase, a plurality of oil holes 10 and through holes 22 are processed simultaneously, the angle of the cylinder hole honing reticulate patterns 23 is adjusted in production, the cost is not increased, and the problem of abrasion of the inner wall of the piston cavity 21 can be better solved in two ways.

In conclusion, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A cylinder liner, characterized in that a through hole is provided on the side wall of the cylinder liner; 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 it comprises: 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 provided on the side of the outer circumferential surface of the piston away from the crankshaft; and the through hole is provided 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 is 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, and 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 a cylinder bore honing pattern is provided on the inner wall of the piston cavity. 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 liner is between 30° and 70°. 7. The horizontally opposed engine according to claim 5 is characterized in that the oil hole and the through hole are coaxially arranged, and the oil hole is formed by a straight line passing through the outer side of the casing to the cylinder liner, 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 hole is 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 liner are integrally formed. 10. A vehicle, characterized by comprising the horizontally opposed engine according to any one of claims 2 to 9.