Cast-in liner assembly, engine, method of manufacturing an engine, and vehicle

Abstract

The application discloses a cast-in cylinder liner assembly, an engine, a manufacturing method of the engine and a vehicle. The cast-in cylinder liner assembly comprises a plurality of cast-in cylinder liners arranged side by side, and an outer side wall of each cast-in cylinder liner is provided with a first protruding part and / or a first recessed part; in two adjacent cast-in cylinder liners, the first protruding part of one cast-in cylinder liner is positioned and matched with the first recessed part of the other cast-in cylinder liner, which is beneficial to improving the position accuracy of the two adjacent cast-in cylinder liners, beneficial to guaranteeing the consistency of the thickness of the part of the cast cylinder body between any two cast-in cylinder liners, and beneficial to effectively reducing the risk of engine failure and abnormal sound and reducing the fuel consumption of the engine.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a cylinder liner assembly, an engine, a method for manufacturing the engine, and a vehicle. Background Technology

[0002] In related technologies, when manufacturing engine cylinder blocks, multiple cylinder liners can be assembled onto sand cores separately, and then the cylinder block is cast. There are relative assembly tolerances between the cylinder liners, and the positional accuracy of each cylinder liner is difficult to guarantee. After the cylinder block is cast, the thickness consistency of the part of the cylinder block located between any two cylinder liners is poor. When machining cooling holes, the side wall of the cylinder liner is easily penetrated in the thinner part. There is a greater risk that the coolant will enter the piston hole of the cylinder liner when flowing through the cooling holes, resulting in a greater risk of coolant leakage. This can easily lead to oil-water mixing and serious failures. In addition, the thinner part is more prone to deformation under stress, which can easily cause axial displacement of the cylinder liner, increasing the friction between the piston and the cylinder liner and leading to increased fuel consumption. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. Therefore, a first objective of the present invention is to provide a cast-in cylinder liner assembly that facilitates ensuring the consistency of thickness in the portion of the cast cylinder block located between any two cast-in cylinder liners, effectively reducing the risk of engine malfunctions and abnormal noises, and also reducing engine fuel consumption.

[0004] The second objective of this invention is to provide an engine.

[0005] The third objective of this invention is to provide a method for manufacturing an engine.

[0006] The fourth objective of this invention is to provide a vehicle.

[0007] According to a first aspect of the present invention, a cast-in cylinder liner assembly includes a plurality of cast-in cylinder liners arranged side by side, each cast-in cylinder liner having a first protrusion and / or a first groove on its outer sidewall, wherein in two adjacent cast-in cylinder liners, the first protrusion of one cast-in cylinder liner is positioned and engaged with the first groove of the other cast-in cylinder liner.

[0008] According to the present invention, in the cast-in cylinder liner assembly, in two adjacent cast-in cylinder liners, the first protrusion of one cast-in cylinder liner is positioned and engaged with the first groove of the other cast-in cylinder liner. This is beneficial to improving the positional accuracy of the two adjacent cast-in cylinder liners, ensuring the consistency of the thickness of the portion of the cast cylinder block located between any two cast-in cylinder liners, effectively reducing the risk of engine malfunctions and abnormal noises, and reducing engine fuel consumption.

[0009] According to some embodiments of the present invention, each of the outer sidewalls of the cast-in cylinder liner has a first protrusion and a first groove, the positions of the first protrusion and the first groove being symmetrical with respect to the mid-plane of the cast-in cylinder liner; wherein the mid-plane is perpendicular to the axis of the cast-in cylinder liner, and the mid-plane is equidistant from both ends of the axial direction of the cast-in cylinder liner.

[0010] According to some embodiments of the present invention, the first protrusion is constructed as an annular protrusion, and the first groove is constructed as an annular groove.

[0011] According to some embodiments of the present invention, the inner wall of the cylinder liner cast into the cylinder liner has a sand core positioning part, which is adapted to cooperate with the sand core positioning.

[0012] According to some embodiments of the present invention, the sand core positioning part includes: a second protrusion and a second groove, wherein in the radial direction of the cylinder liner, the second protrusion corresponds to the first groove and the second groove corresponds to the first protrusion.

[0013] An engine according to a second aspect of the present invention includes: a cast cylinder block and a cast cylinder liner assembly as described above, the cast cylinder liner assembly being embedded in the cast cylinder block.

[0014] According to an embodiment of the present invention, in the engine of the cylinder liner assembly, in two adjacent cylinder liners, the first protrusion of one cylinder liner is positioned and engaged with the first groove of the other cylinder liner. This is beneficial to improving the positional accuracy of the two adjacent cylinder liners, ensuring the consistency of the thickness of the portion of the cast cylinder block located between any two cylinder liners, effectively reducing the risk of engine malfunction and abnormal noise, and reducing engine fuel consumption.

[0015] According to some embodiments of the present invention, the casting cylinder body is provided with a first cooling channel, and the first protrusion is provided with a second cooling channel communicating with the first cooling channel.

[0016] According to some embodiments of the present invention, the number of the cast-in cylinder liner assemblies is two and arranged in a V-shape.

[0017] According to a third aspect of the present invention, a method for manufacturing an engine, wherein the engine is the engine described in the above embodiment, the method for manufacturing the engine includes the following steps: preheating the cast cylinder liner assembly and then fitting it onto a sand core; placing the sand core with the cast cylinder liner assembly into a mold, and injecting molten metal into the mold to form the cast cylinder body.

[0018] According to the engine manufacturing method of the present invention, in the two adjacent cast-in cylinder liners of the manufactured engine, the first protrusion of one cast-in cylinder liner is positioned and matched with the first groove of the other cast-in cylinder liner. This is beneficial to improving the positional accuracy of the two adjacent cast-in cylinder liners, and to ensuring the consistency of the thickness of the portion of the cast cylinder block located between any two cast-in cylinder liners. This can effectively reduce the risk of engine failure and abnormal noise, and can also reduce engine fuel consumption.

[0019] A vehicle according to a fourth aspect of the present invention includes the engine described in the above embodiments.

[0020] According to an embodiment of the present invention, in the vehicle, in two adjacent cast-in cylinder liners of the engine, the first protrusion of one cast-in cylinder liner is positioned and engaged with the first groove of the other cast-in cylinder liner. This is beneficial to improving the positional accuracy of the two adjacent cast-in cylinder liners, ensuring the consistency of the thickness of the portion of the cast cylinder block located between any two cast-in cylinder liners, effectively reducing the risk of engine malfunctions and abnormal noises, and reducing engine fuel consumption.

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

[0022] Figure 1 This is a cross-sectional view of a cast-in cylinder liner assembly according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of the cylinder liner being cast according to an embodiment of the present invention; Figure 3 This is a perspective view of the cylinder liner being cast according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the cast cylinder liner assembly and the cast cylinder body according to an embodiment of the present invention; Figure 5 This is a perspective view of the cast-in cylinder liner assembly and sand core according to an embodiment of the present invention; Figure 6 This is a flowchart of a method for manufacturing an engine according to an embodiment of the present invention.

[0023] Figure label: Cast into cylinder liner 1; outer side wall 11; first protrusion 111; second cooling channel 1111; first groove 112; center surface 12; inner side wall 13; sand core positioning part 131; second protrusion 1311; second groove 1312; first cylinder liner 1a; second cylinder liner 1b; 10 cylinder liner assembly; 20 sand core; 30 cast cylinder block. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the terms "thickness", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] The following is combined Figures 1-6 The present invention describes in detail the cast-in cylinder liner assembly 10, the engine, the engine manufacturing method, and the vehicle according to embodiments of the present invention.

[0029] Reference Figures 1-4 As shown, the cast-in cylinder liner assembly 10 according to a first aspect embodiment of the present invention includes a plurality of cast-in cylinder liners 1 arranged in parallel. The outer side wall 11 of each cast-in cylinder liner 1 has a first protrusion 111 and / or a first groove 112. In two adjacent cast-in cylinder liners 1, the first protrusion 111 of one cast-in cylinder liner 1 is positioned and engaged with the first groove 112 of the other cast-in cylinder liner 1.

[0030] It should be noted that during engine manufacturing, the cylinder liner assembly 10 can be first fitted onto the sand core 20 used to form the main bearing hole of the cast cylinder block 30. Then, the sand core 20 with the cylinder liner assembly 10 is placed into the mold, and molten metal is injected into the mold to form the cast cylinder block 30 of the engine. After the cast cylinder block 30 is formed, it forms an integral structure with the cylinder liner 1. In the axial direction of the cylinder liner 1, the piston hole can be machined on the inner wall of the cylinder liner 1 to ensure the positional accuracy of the piston hole. The piston hole allows the piston of the engine to move.

[0031] It is understood that each outer wall 11 of the cast cylinder liner 1 has a first protrusion 111 and / or a first groove 112. That is, the outer wall 11 of the cast cylinder liner 1 has a first protrusion 111, or the outer wall 11 of the cast cylinder liner 1 has a first groove 112, or the outer wall 11 of the cast cylinder liner 1 has both a first protrusion 111 and a first groove 112. For example, in two adjacent cast cylinder liners 1, one outer wall 11 of the cast cylinder liner 1 has a first protrusion 111 and the other outer wall 11 of the cast cylinder liner 1 has a first groove 112, or in two adjacent cast cylinder liners 1, both outer walls 11 of the cast cylinder liners 1 have both a first protrusion 111 and a first groove 112.

[0032] In two adjacent cast-in cylinder liners 1, the first protrusion 111 of one cast-in cylinder liner 1 and the first groove 112 of the other cast-in cylinder liner 1 are positioned and engaged, which helps to improve the positional accuracy of the two adjacent cast-in cylinder liners 1. After the engine's cast cylinder block 30 is cast, the thickness of the portion of the cast cylinder block 30 located between any two adjacent cast-in cylinder liners 1 can be guaranteed to be consistent, avoiding localized thinness. When machining cooling holes between two adjacent cast-in cylinder liners 1, the risk of the cooling holes penetrating the sidewall of the cast-in cylinder liner 1 can be reduced, as can the risk of coolant flowing through the cooling holes into the piston bore, preventing coolant leakage and preventing coolant from mixing with fuel, thereby effectively reducing the risk of engine failure. The coolant can be either coolant water or coolant oil.

[0033] In addition, the consistency of the thickness of any two adjacent cast cylinder liners 1 can help reduce the risk of local deformation of the cast cylinder block 30, reduce the risk of axial displacement of the cast cylinder liners 1, reduce the friction between the piston and the cast cylinder liners 1, thereby reducing friction work, reducing fuel consumption, and reducing the risk of piston knocking in the engine and reducing abnormal noise.

[0034] According to the embodiment of the present invention, in the cast-in cylinder liner assembly 10, in two adjacent cast-in cylinder liners 1, the first protrusion 111 of one cast-in cylinder liner 1 is positioned and engaged with the first groove 112 of the other cast-in cylinder liner 1. This is beneficial to improving the positional accuracy of the two adjacent cast-in cylinder liners 1, and to ensuring the consistency of the thickness of the portion of the cast cylinder block 30 located between any two cast-in cylinder liners 1. This can effectively reduce the risk of engine malfunction and abnormal noise, and can also reduce engine fuel consumption.

[0035] In some embodiments of the present invention, reference is made to... Figure 1 As shown, each outer wall 11 of the cast cylinder liner 1 has a first protrusion 111 and a first groove 112. The positions of the first protrusion 111 and the first groove 112 are symmetrical with respect to the middle surface 12 of the cast cylinder liner 1. The middle surface 12 is perpendicular to the axis of the cast cylinder liner 1, and the distance between the middle surface 12 and the two ends of the axial direction of the cast cylinder liner 1 is equal.

[0036] Understandably, referring to Figure 1 As shown, two adjacent cylinder liners 1 are cast into each other, one of which is the first cylinder liner 1a and the other is the second cylinder liner 1b. Assembly can be achieved by reversing the axial ends of the first cylinder liner 1a and the second cylinder liner 1b. (Refer to...) Figure 1 As shown, the first protrusion 111 of the first cylinder liner 1a is located below the intermediate surface 12, and the first groove 112 of the first cylinder liner 1a is located above the intermediate surface 12. The first protrusion 111 of the second cylinder liner 1b is located above the intermediate surface 12, and the first groove 112 of the second cylinder liner 1b is located below the intermediate surface 12. The first protrusion 111 of the first cylinder liner 1a is inserted into the first groove 112 of the second cylinder liner 1b, and the first protrusion 111 of the second cylinder liner 1b is inserted into the first groove 112 of the first cylinder liner 1a, which can form two sets of positioning fits, which is beneficial to improving the positional accuracy of two adjacent cylinder liners 1.

[0037] The symmetry between the position of the first protrusion 111 and the position of the first groove 112 relative to the center surface 12 of the cast cylinder liner 1 ensures that any two adjacent cast cylinder liners 1 can achieve positioning and fit, while making each cast cylinder liner 1 have the same structure. Each cast cylinder liner 1 can be cast using the same specification mold, which helps to reduce mold development costs. Furthermore, when assembling the cast cylinder liner assembly 10, there is no need to distinguish the model of the cast cylinder liner 1, which helps to improve the assembly efficiency of the cast cylinder liner assembly 10.

[0038] In some embodiments of the present invention, reference is made to... Figure 3As shown, the first protrusion 111 is an annular protrusion and the first groove 112 is an annular groove, so that the cylinder liner 1 can be integrally cast by centrifugal casting process. The first protrusion 111 and the second protrusion 1311 do not require special processing procedures, which is conducive to improving the production efficiency of the cylinder liner 1, so as to realize the low cost and mass production of the cylinder liner 1.

[0039] Understandably, after the cylinder block 30 is cast, it is referenced... Figure 4 As shown, at least a portion of the first protrusion 111 can be embedded in the cast cylinder block 30. The first protrusion 111, which is constructed as an annular protrusion, can increase the contact area between the cast cylinder liner 1 and the cast cylinder block 30, which is beneficial to improving the connection strength between the cast cylinder liner 1 and the cast cylinder block 30, thereby improving the structural stability of the engine.

[0040] In some embodiments of the present invention, reference is made to... Figure 2 As shown, the inner wall 13 of the cylinder liner 1 has a sand core positioning part 131. The sand core positioning part 131 is suitable for positioning and cooperating with the sand core 20, which can reduce the assembly tolerance between the sand core 20 and the cylinder liner 1, which is conducive to further improving the positional accuracy of the cylinder liner 1, and to ensuring the consistency of the thickness of the part of the cast cylinder block 30 located between any two cylinder liners 1. This can effectively reduce the risk of engine failure and abnormal noise, and reduce engine fuel consumption.

[0041] In some embodiments of the present invention, reference is made to... Figure 2 As shown, the sand core positioning part 131 includes a second protrusion 1311 and a second groove 1312. In the radial direction of the cylinder liner 1, the second protrusion 1311 corresponds to the first groove 112, and the second groove 1312 corresponds to the first protrusion 111. This helps to ensure the uniform wall thickness of the cylinder liner 1 and avoids the local thinning of the cylinder liner 1 due to the opening of the first groove 112 and the second groove 1312. This helps to ensure the structural strength of the cylinder liner 1. When the cylinder body 30 is cast, it can reduce the risk of local deformation of the cylinder liner 1 and help to ensure the consistency of the thickness of the part of the cylinder body 30 located between any two cylinder liners 1.

[0042] Specifically, the sand core 20 has a third protrusion and a third groove. The second protrusion 1311 can be inserted into the third groove, and the third protrusion can be inserted into the second groove 1312, so as to realize the positioning and cooperation between the sand core positioning part 131 and the sand core 20.

[0043] In some embodiments, refer to Figure 2 and Figure 3As shown, the second protrusion 1311 is an annular protrusion and the second groove 1312 is an annular groove, so that the cylinder liner 1 can be integrally cast by centrifugal casting process. The first protrusion 111 and the second protrusion 1311 do not require special processing procedures, which is conducive to improving the production efficiency of the cylinder liner 1 and realizing low cost and mass production of the cylinder liner 1.

[0044] In other embodiments not shown in the figures, the second protrusion 1311 is constructed as a non-circular protrusion, and the third groove corresponding to the second protrusion 1311 is constructed as a non-circular groove. For example, the second protrusion 1311 is constructed as a 1 / 4-circular protrusion and the third groove is constructed as a 1 / 4-circular groove; the second protrusion 1311 is constructed as a 1 / 8-circular protrusion and the third groove is constructed as a 1 / 8-circular groove; the second groove 1312 is constructed as a non-circular groove, and the third protrusion corresponding to the second groove 1312 is constructed as a non-circular protrusion. For example, the second groove 1312 is constructed as a 1 / 4-circular groove and the third protrusion is constructed as a 1 / 4-circular protrusion; or the second groove 1312 is constructed as... The second protrusion 1311 is constructed as a 1 / 8 ring groove and the third protrusion is constructed as a 1 / 8 ring protrusion. During the process of installing the cast cylinder liner 1 into the sand core 20, the second protrusion 1311 can only be inserted into the third groove when the second protrusion 1311 is aligned with the third groove, and the third protrusion can only be inserted into the second groove 1312 when the third protrusion is aligned with the second groove 1312. This can achieve directional assembly of the cast cylinder liner 1. It can be understood that when the piston moves in the piston hole of the cast cylinder liner 1, the force on different parts of the side wall of the cast cylinder liner 1 is not uniform. The thickness of the part with greater force can be increased. Through directional assembly, the part can be accurately assembled to the preset position.

[0045] According to the embodiment of the present invention, the cast cylinder liner assembly 10 can be firmly fixed on the sand core 20. The cast cylinder liner assembly 10 and the sand core 20 are integrally constructed as a mold. Compared with the method of assembling the cast cylinder liner 1 to the top mold and then assembling it with the sand core 20 (bottom mold) through the top mold, this embodiment can eliminate the assembly tolerance between molds. Moreover, the positioning and matching of two adjacent cast cylinder liners 1 can effectively improve the positional accuracy of the cast cylinder liners 1. The high overall positioning accuracy of the cast cylinder liner assembly 10 is beneficial to ensuring the spacing accuracy of adjacent cast cylinder liners 1, ensuring the consistency of the thickness of the part of the cast cylinder body 30 located between any two cast cylinder liners 1, improving the overall structural strength of the cast cylinder body 30, and improving engine performance, life and fuel consumption. In addition, this embodiment has easy process, low production efficiency, low cost and high positional accuracy, and is suitable for the mass production of engines. It can also improve the level of parts, shorten the production cycle, and basically eliminate the positional deviation of the cast cylinder liners 1.

[0046] An engine according to a second aspect of the present invention includes: a cast cylinder block 30 and a cast cylinder liner assembly 10 as described above. The cast cylinder liner assembly 10 is embedded in the cast cylinder block 30, which can increase the contact area between the cast cylinder liner assembly 10 and the cast cylinder block 30, thereby improving the connection strength between the cast cylinder liner assembly 10 and the cast cylinder block 30 and thus improving the structural stability of the engine.

[0047] According to an embodiment of the present invention, in the engine of the cylinder liner assembly 10, in two adjacent cylinder liners 1, the first protrusion 111 of one cylinder liner 1 is positioned and engaged with the first groove 112 of the other cylinder liner 1. This is beneficial to improving the positional accuracy of the two adjacent cylinder liners 1, and to ensuring the consistency of the thickness of the portion of the cast cylinder block 30 located between any two cylinder liners 1. This can effectively reduce the risk of engine failure and abnormal noise, and can also reduce the engine's fuel consumption.

[0048] In some embodiments of the present invention, the casting cylinder 30 is provided with a first cooling channel, and the first protrusion 111 is provided with a second cooling channel 1111 that communicates with the first cooling channel.

[0049] It is understandable that coolant can flow through the first cooling channel, and the coolant in the first cooling channel can flow to the second cooling channel 1111. Since the second cooling channel 1111 is located at the first protrusion 111, the coolant flowing through the second cooling channel 1111 can directly contact the first protrusion 111, realizing direct heat exchange between the coolant and the first protrusion 111. This helps to improve the heat exchange efficiency between the coolant and the cylinder liner 1, enabling rapid cooling. The cylinder liner 1 can be used in high-power engines. (Referring to...) Figure 4 As shown, the axis of the second cooling channel 1111 is perpendicular to the axis of the cylinder liner 1, and the second cooling channel 1111 is constructed as a horizontal water hole.

[0050] In some embodiments of the present invention, reference is made to... Figure 5 As shown, there are two cylinder liner assemblies 10 cast into the cylinder and they are arranged in a V-shape, and the engine structure is a V-type engine.

[0051] It is understandable that the number of cylinder liners 1 cast into the V-type engine is relatively large. In two adjacent cylinder liners 1, the first protrusion 111 of one cylinder liner 1 is positioned and engaged with the first groove 112 of the other cylinder liner 1, and the sand core positioning part 131 of the cylinder liner 1 is positioned and engaged with the sand core 20. This can effectively reduce the relative assembly tolerance between each cylinder liner 1, as well as the assembly tolerance between the cylinder liner 1 and the sand core 20, which is beneficial to ensuring the positional accuracy of the cylinder liners 1.

[0052] Reference Figure 6As shown, according to a third aspect embodiment of the present invention, the engine is the engine described in the above embodiment, and the engine manufacturing method includes the following steps: Step S1: After preheating the cast cylinder liner assembly, fit it onto the sand core.

[0053] The preheating and expansion of the cylinder liner assembly 10 during the process of casting the cylinder liner assembly 10 into the sand core 20 can reduce the risk of interference between the cylinder liner assembly 10 and the sand core 20, so as to facilitate the casting of the cylinder liner assembly 10 into the sand core 20. In addition, during the subsequent casting of molten metal, the temperature difference between the molten metal and the cylinder liner assembly 10 can be reduced, which can reduce the thermal stress on the cylinder liner assembly 10 and reduce the risk of cracking of the cylinder liner assembly 10.

[0054] Step S2: Place the sand core with the cylinder liner assembly into the mold, and pour molten metal into the mold to form the cast cylinder body.

[0055] The molten metal solidifies to form a cast cylinder block 30, and the cast cylinder liner assembly 10 is embedded in the cast cylinder block 30 to form an integral structural component, which helps to improve the connection strength between the cast cylinder liner assembly 10 and the cast cylinder block 30, thereby improving the structural stability of the engine.

[0056] According to the engine manufacturing method of the present invention, in the two adjacent cast-in cylinder liners of the manufactured engine, the first protrusion of one cast-in cylinder liner is positioned and matched with the first groove of the other cast-in cylinder liner. This is beneficial to improving the positional accuracy of the two adjacent cast-in cylinder liners, and to ensuring the consistency of the thickness of the portion of the cast cylinder block located between any two cast-in cylinder liners. This can effectively reduce the risk of engine failure and abnormal noise, and can also reduce engine fuel consumption.

[0057] A vehicle according to a fourth aspect of the present invention includes the engine described in the above embodiments.

[0058] According to an embodiment of the present invention, in the vehicle, in the two adjacent cast-in cylinder liners 1 of the engine, the first protrusion 111 of one cast-in cylinder liner 1 is positioned and engaged with the first groove 112 of the other cast-in cylinder liner 1. This is beneficial to improving the positional accuracy of the two adjacent cast-in cylinder liners 1, and to ensuring the consistency of the thickness of the portion of the cast cylinder block 30 located between any two cast-in cylinder liners 1. This can effectively reduce the risk of engine failure and abnormal noise, and can also reduce engine fuel consumption.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cast-in cylinder liner assembly, characterized in that, It includes a plurality of cast-in cylinder liners (1) arranged side by side, each of the cast-in cylinder liners (1) having a first protrusion (111) and / or a first groove (112) on its outer sidewall (11), wherein in two adjacent cast-in cylinder liners (1), the first protrusion (111) of one cast-in cylinder liner (1) is positioned and engaged with the first groove (112) of the other cast-in cylinder liner (1); Each of the outer sidewalls (11) of the cast-in cylinder liner (1) has a first protrusion (111) and a first groove (112), the positions of the first protrusion (111) and the first groove (112) being symmetrical with respect to the mid-plane (12) of the cast-in cylinder liner (1). The mid-plane (12) is perpendicular to the axis of the cylinder liner (1), and the mid-plane (12) is equidistant from both ends of the cylinder liner (1).

2. The cast-in cylinder liner assembly according to claim 1, characterized in that, The first protrusion (111) is constructed as an annular protrusion, and the first groove (112) is constructed as an annular groove.

3. The cast-in cylinder liner assembly according to claim 1 or 2, characterized in that, The inner wall (13) of the cylinder liner (1) has a sand core positioning part (131), which is adapted to be positioned and engaged with the sand core (20).

4. The cast-in cylinder liner assembly according to claim 3, characterized in that, The sand core positioning part (131) includes a second protrusion (1311) and a second groove (1312). In the radial direction of the cylinder liner (1), the second protrusion (1311) corresponds to the first groove (112), and the second groove (1312) corresponds to the first protrusion (111).

5. An engine, characterized in that, include: The cast cylinder body (30) and the cast cylinder liner assembly according to any one of claims 1-4, wherein the cast cylinder liner assembly is embedded in the cast cylinder body (30).

6. The engine according to claim 5, characterized in that, The cast cylinder body (30) has a first cooling channel, and the first protrusion (111) has a second cooling channel (1111) that communicates with the first cooling channel.

7. The engine according to claim 5, characterized in that, The number of cast-in cylinder liner assemblies is two, arranged in a V-shape.

8. A method for manufacturing an engine, characterized in that, The engine is the engine according to any one of claims 5-7, and the method of manufacturing the engine includes the following steps: The preheated cylinder liner assembly is then fitted onto the sand core. The sand core with the cylinder liner assembly is placed into the mold, and molten metal is injected into the mold to form the cast cylinder body.

9. A vehicle, characterized in that, Includes the engine according to any one of claims 5-7.

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