Engine cylinder block and engine

Abstract

The utility model provides an engine cylinder block and an engine. The engine cylinder block comprises a cylinder body, a cylinder sleeve and a dividing piece. A flow channel for circulating cooling liquid is formed between the cylinder body and the cylinder sleeve; limiting parts are formed on the opposite side walls, at preset positions, of the cylinder body and the cylinder sleeve, and a mounting space is defined by the two opposite limiting parts, at the preset positions, of the cylinder body and the cylinder sleeve; the dividing piece is arranged in the mounting space; the number of the preset positions is multiple, and any two of the preset positions are provided with dividing pieces so that the flow channel can be divided into an inlet flow channel part and an outlet flow channel part. The limiting part is cast simultaneously when the cylinder body and the cylinder sleeve are cast, so that working procedures are saved, and the structure is simple. Besides, by adjusting the position of the dividing piece, the size of the flow inlet channel part and the size of the flow outlet channel part can be adjusted, the flow of the coolant in the flow inlet channel part and the flow of the coolant in the flow outlet channel part can be adjusted, and therefore the heat exchange efficiency can be adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to an engine cylinder block and an engine. BACKGROUND

[0002] At present, most of the water jackets on the cylinder block adopt a two-side water inlet and outlet structure. This structure needs to divide the intake and exhaust water jackets, mainly according to the position of the water inlet and outlet to determine the division point. The existing cylinder block water jacket division adopting the two-side water inlet and outlet is basically divided by a partition plate cast at the joint of the water jacket and the cylinder wall.

[0003] However, the above-mentioned method needs to be realized by a mold, which leads to a complex mold structure, high cost, and great difficulty in changing in the later period. In addition, the flexibility and economy of the change are poor.

[0004] Therefore, there is an urgent need for an engine cylinder block and an engine to solve the technical problems existing in the prior art to some extent. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide an engine cylinder block and an engine, which saves the process to some extent, has a simple structure, and the heat exchange efficiency is adjustable.

[0006] The present application provides an engine cylinder block, which comprises a cylinder body, a cylinder liner, and a dividing piece.

[0007] The cylinder body is sleeved on the cylinder liner, and a flow channel for circulating cooling liquid is formed between the cylinder body and the cylinder liner.

[0008] The cylinder body and the cylinder liner are both formed with a limiting portion on the side wall facing each other at a preset position, and the two limiting portions facing each other at the preset position surround an installation space; the dividing piece is arranged in the installation space.

[0009] The preset positions are multiple, and any two of the preset positions are provided with the dividing piece to divide the flow channel into an inflow channel part and an outflow channel part.

[0010] In the above technical solution, further, the dividing piece is adjusted at different preset positions to adjust the volume of the inflow channel part and the outflow channel part, so that the heat exchange efficiency can be adjusted.

[0011] In the above technical solution, further, the limiting portion is an arc-shaped groove.

[0012] The arc-shaped groove on the cylinder body and the arc-shaped groove on the cylinder liner are curved towards the side walls facing each other at the preset position to surround the installation space.

[0013] In the above technical solution, further, the arc-shaped groove extends along the axis direction of the cylinder body.

[0014] In the above technical solution, further, the partition member is a pin body;

[0015] The pin body has the same size as the mounting space near the cylinder head part, and a gap is formed between at least part of the pin body near the cylinder head and the side wall of the cylinder body and / or the side wall of the cylinder liner;

[0016] The cooling liquid can flow between the inlet passage part and the outlet passage part through the gap.

[0017] In the above technical solution, further, the pin body has a sealing cap part and a transition part formed in sequence along the axial direction of the pin body;

[0018] The sealing cap part is near the cylinder head and has the same size as the mounting space;

[0019] The transition part has a smaller size than the sealing cap part, so that a gap is formed between the transition part and the side wall of the cylinder body and / or the side wall of the cylinder liner.

[0020] In the above technical solution, further, the transition part includes a first transition section and a second transition section connected to each other;

[0021] One end of the first transition section, which is away from the second transition section, is connected to the sealing cap part;

[0022] The first transition section has a smaller size than the second transition section, and the second transition section has a smaller size than the sealing cap part, so that the size of the gap decreases in the direction from the sealing cap part to the second transition section.

[0023] In the above technical solution, further, the pin body is made of thermoplastic resin.

[0024] The application also provides an engine including the engine cylinder body described above;

[0025] The cylinder head is buckled on the engine cylinder body;

[0026] The cylinder head has a flow guide channel therein, and the two ends of the flow guide channel are respectively connected to the inlet passage part and the outlet passage part;

[0027] The cooling liquid flows in the inlet passage part, the flow guide channel, and the outlet passage part in sequence.

[0028] In the above technical solution, further, the engine cylinder body has an air inlet side, an air outlet side, a water inlet, and a water outlet;

[0029] The exhaust side is located on the same side as the water inlet, and the air inlet side is located on the same side as the water outlet.

[0030] The cooling liquid is guided to the inlet channel portion through the water inlet and can be guided out of the outlet channel portion through the water outlet.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] The present application provides an engine cylinder body, comprising a cylinder body, a cylinder sleeve and a partition piece.

[0033] The cylinder body is sleeved on the cylinder sleeve, and a flow channel for the cooling liquid is formed between the cylinder body and the cylinder sleeve.

[0034] The cylinder body and the cylinder sleeve each form a limiting portion on the side wall of the preset position, and the two limiting portions of the preset position are surrounded by a mounting space; the partition piece is arranged in the mounting space.

[0035] The preset positions are multiple, and any two of the preset positions are provided with the partition piece to divide the flow channel into an inlet channel portion and an outlet channel portion.

[0036] In summary, the limiting portion is cast at the same time when the cylinder body and the cylinder sleeve are cast, which saves the process compared with the prior art of casting a partition plate between the cylinder body and the cylinder sleeve, has a simple structure, is easy to process, and has low cost. In addition, by adjusting the position of the partition piece, the volume of the inlet channel portion and the outlet channel portion can be adjusted, and the flow of the coolant in the inlet channel portion and the outlet channel portion can be adjusted, so that the heat exchange efficiency can be adjusted. In addition, this method has the advantages of simple modification, high flexibility, short cycle, low cost and the like compared with the traditional mold modification method. Furthermore, the mold for processing the present application has a simpler structure than the mold of the traditional method, is easy to process, and has lower cost.

[0037] The present application also provides an engine comprising the above-mentioned engine cylinder body.

[0038] The cylinder cover is buckled on the engine cylinder body.

[0039] The cylinder cover has a flow guide channel therein, and the two ends of the flow guide channel are respectively communicated with the inlet channel portion and the outlet channel portion.

[0040] The cooling liquid sequentially flows through the inlet channel portion, the flow guide channel and the outlet channel portion.

[0041] In summary, the split of the cylinder on the intake and exhaust side is achieved by machining an arc-shaped groove on the cylinder block and installing a pin. When the engine needs to adjust the intake and exhaust side cooling liquid temperature, the machining position of the arc-shaped groove of the pin can be adjusted to quickly adjust the installation position of the pin to change the flow of cooling liquid in the inlet and outlet flow passages. The method has the advantages of simple modification, high flexibility, short cycle, low cost, etc. compared with the traditional modification method. Furthermore, the mold structure for producing the cylinder of the application is simpler than the mold structure of the traditional method, easier to process, and lower in cost. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0043] Figure 1 The first structure schematic diagram of the engine cylinder provided by the present application;

[0044] Figure 2 The A-A sectional view in Figure 1

[0045] Figure 3 The second structure schematic diagram of the engine cylinder provided by the present application;

[0046] Figure 4 The structure schematic diagram of the pin in the engine cylinder provided by the present application;

[0047] Figure 5 The partial structure schematic diagram of the engine cylinder provided by the present application;

[0048] Figure 6 The enlarged view of B in Figure 5

[0049] Figure 7 The flow schematic diagram of the cooling liquid in the present application.

[0050] Reference signs: 1-cylinder body; 2-cylinder sleeve; 3-split part; 4-flow passage; 5-mounting space; 6-inlet flow passage part; 7-outlet flow passage part; 8-arc-shaped groove; 9-pin; 10-gap; 11-sealing cap part; 12-transition part; 13-first transition section; 14-second transition section; 16-intake side; 17-exhaust side; 18-water inlet; 19-water outlet; 20-first preset position; 21-second preset position; 22-third preset position; 23-fourth preset position; 24-fifth preset position; 25-sixth preset position.​​ DETAILED DESCRIPTION

[0051] The following detailed description is presented to aid in understanding the methods, devices, and / or systems described herein. It is not intended to be limiting. For example, the order in which the operations are described is not intended to be limiting. Changes, modifications and equivalents can be made to the methods, devices and / or systems described herein, with the understanding that the application is not limited thereto. Furthermore, the description is not intended to be in any way limited by the description of the examples set forth herein. Also, features described herein can be combined in any combination.

[0052] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as illustrative of a number of ways in which the methods, devices and / or systems described herein can be implemented.

[0053] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being “on” another element, “connected to” another element, “coupled to” another element, “adjacent to” another element, or “covering” another element, it can be directly on, connected, coupled, adjacent to or covering the other element or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being “directly on”, “directly connected to”, “directly coupled to”, “directly adjacent to”, or “directly covering” another element, there are no other elements interposed therebetween.

[0054] As used herein, the term “and / or” includes any one of the listed items and any combination of two or more of the listed items.

[0055] Although terms such as “first”, “second”, and “third” can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, assembly, region, layer or section in an example described herein can also be referred to as a second component, assembly, region, layer or section, without departing from the teachings of the example.

[0056] For ease of description, spatially relative terms, such as "on", "upper", "lower", "above", and "below", can be used herein for the purpose of illustrating one element's relationship to another element within the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as being "on" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "on" encompasses both an "on" and "below" orientation. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.

[0057] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" as used herein, are specifically intended to be construed as open-ended terms (i.e., the terms do not exclude the presence of other elements or steps). The term "coupled" as used herein is intended to mean physically, logically, or communicatively coupled or linked, unless otherwise indicated.

[0058] Variations in shapes depicted in the figures can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the specific shapes described in the figures, but include variations in shapes that occur during manufacturing.

[0059] Features of the examples described herein can be combined with each other as would be apparent to one of ordinary skill in the art having the benefit of the present disclosure. Furthermore, although exemplary examples have been described herein, other configurations are possible.

[0060] Embodiment One

[0061] The present application provides an engine cylinder block, comprising a cylinder body 1, a cylinder liner 2 and a partition 3. The cylinder liner 2 is arranged in the cylinder body 1, the piston is arranged in the cylinder liner 2, the flow channel 4 is formed between the cylinder body 1 and the cylinder liner 2, and the cooling liquid flows in the flow channel 4; when the engine works, the piston reciprocates in the cylinder liner 2; when the piston reciprocates in the cylinder liner 2, heat is generated due to the friction between the piston and the cylinder liner 2, and the flow of the cooling liquid in the flow channel 4 can just take away the heat, that is, the heat exchange and cooling are realized by the cooling liquid and the cylinder liner 2.

[0062] Specifically, the cylinder body 1 and the cylinder sleeve 2 are formed with a limiting part on the side wall of the opposite position, that is, the side wall of the cylinder body 1 is formed with a limiting part towards the cylinder sleeve 2 at the opposite position, and the side wall of the cylinder sleeve 2 is also formed with a limiting part towards the cylinder body 1 at the opposite position; in addition, the opposite limiting parts at the opposite position are surrounded by the installation space 5, that is, the opposite limiting parts are surrounded by the installation space 5, and the partition piece 3 is arranged in the installation space 5; the limiting part is simultaneously cast when the cylinder body 1 and the cylinder sleeve 2 are cast, compared with the prior art, the limiting part is cast between the cylinder body 1 and the cylinder sleeve 2, the process is saved, the structure is simple, easy to process, and low in cost.

[0063] Specifically, in combination with Figure 1 , four cylinder sleeves 2 are shown in the figure, because the four cylinder sleeves 2 are connected in sequence, the flow channel 4 formed between the four cylinder sleeves 2 and the cylinder body is in a wavy annular structure; further in combination with Figure 1 , the partition piece 3 is arranged symmetrically on the left and right sides of the flow channel 4, so as to divide the flow channel 4 into an inlet flow channel part 6 and an outlet flow channel part 7. Figure 2 , the lower half of the flow channel 4 is the inlet flow channel part 6, and the upper half is the outlet flow channel part 7; when the cylinder body is cooled, the cooling liquid flows into the inlet flow channel part 6, heats the cylinder sleeve 2 in the lower half of the flow channel 4, and then flows into the outlet flow channel part 7 to heat the cylinder sleeve 2 in the upper half of the flow channel 4, and finally is discharged (discharged to the heat dissipation system of the vehicle, the heat dissipation system is not within the protection scope of the present application, and the heat dissipation system of the vehicle is understood by those skilled in the art, so it is not described in detail here). Figure 1 Figure 1 , the limiting part is simultaneously cast when the cylinder body 1 and the cylinder sleeve 2 are cast, compared with the prior art, the limiting part is cast between the cylinder body 1 and the cylinder sleeve 2, the process is saved, the structure is simple, easy to process, and low in cost. Figure 1 , the limiting part is simultaneously cast when the cylinder body 1 and the cylinder sleeve 2 are cast, compared with the prior art, the limiting part is cast between the cylinder body 1 and the cylinder sleeve 2, the process is saved, the structure is simple, easy to process, and low in cost.

[0064] Figure 3 , the limiting part is simultaneously cast when the cylinder body 1 and the cylinder sleeve 2 are cast, compared with the prior art, the limiting part is cast between the cylinder body 1 and the cylinder sleeve 2, the process is saved, the structure is simple, easy to process, and low in cost.

[0065] ​​In the actual heat exchange process, the temperature of the cooling liquid flowing out of the outlet channel part 7 and the temperature of the cooling liquid flowing out of the inlet channel part 6 are required, for example, the temperature of the cooling liquid flowing out of the inlet channel part 6 is 90℃, and the temperature of the cooling liquid flowing out of the outlet channel part 7 is 100℃. When the temperature of the cooling liquid flowing out of the outlet channel part 7 is higher than 100℃, for example, reaches 110℃, the left and right partition pieces 3 can be moved downward, so that the volume of the outlet channel part 7 is greater than the volume of the inlet channel part 6, thereby increasing the flow of the cooling liquid in the outlet channel part 7, and further increasing the heat exchange area of the cooling liquid in the outlet channel part 7 and the cylinder sleeve 2, thereby improving the heat exchange efficiency, and further regulating the temperature of the cooling liquid flowing out of the outlet channel part 7 to remain at 100℃. Similarly, when the temperature of the cooling liquid flowing out of the inlet channel part 6 is higher than 90℃, for example, reaches 95℃, the left and right partition pieces 3 can be moved upward, that is, the right partition piece 3 is adjusted from the first preset position 20 to the second preset position 21, and the left partition piece 3 is adjusted from the sixth preset position 25 to the fifth preset position 24; so that the volume of the inlet channel part 6 is greater than the volume of the outlet channel part 7, thereby increasing the flow of the cooling liquid in the inlet channel part 6, and further increasing the heat exchange area of the cooling liquid in the inlet channel part 6 and the cylinder sleeve 2.

[0066] In summary, by adjusting the position of the partition piece 3, the volume of the inlet channel part 6 and the outlet channel part 7 can be adjusted, and the flow of the coolant in the inlet channel part 6 and the outlet channel part 7 can be adjusted, thereby the heat exchange efficiency can be adjusted. In addition, compared with the traditional mold modification method, this method has the advantages of simple modification, high flexibility, short cycle, low cost and the like. Furthermore, the mold for processing the present application has a simpler structure than the mold of the transmission method, is easy to process, and has a lower cost.

[0067] In this embodiment, further, in combination with Figure 6 As shown, the limiting part is an arc-shaped groove 8. The arc-shaped groove 8 on the cylinder body 1 and the arc-shaped groove 8 on the cylinder sleeve 2 are curved on the side wall facing each other at the preset position to surround the installation space 5.

[0068] Specifically, taking the first preset position 20 as an example, the cylinder body 1 is curved with an arc-shaped groove 8 towards the cylinder sleeve 2 at the first preset position 20, the cylinder sleeve 2 is curved to form an arc-shaped groove 8 towards the cylinder body 1, and the arc-shaped groove 8 on the cylinder sleeve 2 is opposite to the arc-shaped groove 8 on the cylinder body 1, and surrounds the installation space 5.

[0069] Specifically, the arc-shaped groove 8 extends along the axis direction of the cylinder body 1, and since the limiting part is an arc-shaped groove 8 structure, the installation space 5 surrounded can be understood as a cylindrical installation space 5.

[0070] In this embodiment, further, in combination with Figure 4 and Figure 5As shown, the partition member 3 is a pin 9, preferably, the pin 9 is a cylinder which is adapted to the mounting space 5 of the cylinder.

[0071] Specifically, the size of the part of the pin 9 close to the cylinder cover is the same as the size of the mounting space 5, when the pin 9 is inserted into the mounting space 5, the part of the pin 9 close to the cylinder cover can completely seal the mounting space 5, so that the coolant of the inlet passage part 6 cannot flow from the top to the outlet passage part 7.

[0072] Specifically, at least part of the pin 9 close to the cylinder cover is formed with a gap 10 between the side wall of the cylinder body 1 and / or the side wall of the cylinder sleeve 2; that is, at least part of the pin 9 close to the cylinder cover can be formed with a gap 10 between the side wall of the cylinder body 1, or at least part of the pin 9 close to the cylinder cover can be formed with a gap 10 between the side wall of the cylinder sleeve 2, or at least part of the pin 9 close to the cylinder cover can be formed with a gap 10 between the side wall of the cylinder body 1 and the side wall of the cylinder sleeve 2 respectively, the above-mentioned gap 10 provides the possibility for the coolant to flow between the inlet passage part 6 and the outlet passage part 7.

[0073] In the actual heat exchange process, the coolant in the outlet passage part 7 and the coolant in the inlet passage part 6 can interact, integrate and synthesize through the above-mentioned gap 10, so that the temperature of the coolant flowing out of the outlet passage part 7 and the coolant flowing out of the inlet passage part 6 is not too high, which meets the above-mentioned temperature requirement.

[0074] Further, the pin 9 is sequentially formed with a sealing cap part 11 and a transition part 12 along the axial direction of the pin 9; wherein the sealing cap part 11 is close to the cylinder cover and the size of the sealing cap part 11 is the same as the size of the mounting space 5; wherein the size of the transition part 12 is smaller than the size of the sealing cap part 11, so that the transition part 12 is formed with a gap 10 between the side wall of the cylinder body 1 and / or the side wall of the cylinder sleeve 2.

[0075] Preferably, the sealing cap part 11 and the transition part 12 are both cylinders, and the diameter of the sealing cap part 11 is the same as the diameter of the mounting space 5, and the diameter of the transition part 12 is smaller than the diameter of the sealing part.

[0076] Further, the transition part 12 includes a first transition segment 13 and a second transition segment 14 which are connected to each other; preferably, the first transition segment 13 and the second transition segment 14 are both cylinders.

[0077] The end of the first transition segment 13 away from the second transition segment 14 is connected to the sealing cap part 11; the size of the first transition segment 13 is smaller than the size of the second transition segment 14, and the size of the second transition segment 14 is smaller than the size of the sealing cap part 11, so that the size of the gap 10 decreases along the direction from the sealing cap part 11 to the second transition segment 14.

[0078] Preferably, the pin body 9 is made of thermoplastic resin, which has good high and low temperature resistance and corrosion resistance.

[0079] It is worth noting that the shape of the limiting part is not limited to the above-mentioned arc-shaped groove 8 structure, but can also be other structures, and similarly, the size is not limited, as long as the installation space 5 and the pin body 9 are matched.

[0080] Embodiment two

[0081] In this embodiment, an engine is provided, which comprises a cylinder head and the above-mentioned engine cylinder body; the cylinder head is buckled on the engine cylinder body; the cylinder head has a flow guide channel 4 therein, and the two ends of the flow guide channel 4 are respectively communicated with the inlet flow channel part 6 and the outlet flow channel part 7.

[0082] Combination Figure 7 As shown, the cooling liquid is introduced from the water inlet 18 to the inlet flow channel part 6, and exchanges heat with the cylinder body in contact therewith in the inlet flow channel part 6, and then flows to the cylinder head, which absorbs part of the heat of the cooling liquid, and then flows to the outlet flow channel part 7, exchanges heat with the cylinder body in contact therewith in the outlet flow channel part 7, and finally is discharged through the water outlet 19.

[0083] Specifically, the engine cylinder body has an air inlet side 16, an air outlet side 17, a water inlet 18 and a water outlet 19;

[0084] Combination Figure 1 And Figure 7 As shown, the air outlet side 17 and the water inlet 18 are located on the same side; the air inlet side 16 and the water outlet 19 are located on the same side; the cooling liquid flows to the inlet flow channel part 6 through the water inlet 18, and can be guided out of the outlet flow channel part 7 through the water outlet 19.

[0085] It is worth noting that the positions of the water inlet 18 and the water outlet 19 are not limited to the above-mentioned positions, and are arranged according to the space of the whole vehicle.

[0086] In summary, the division of the air inlet and outlet side 17 on the cylinder is realized by machining the arc-shaped groove 8 on the cylinder body and installing the pin body 9; when the engine needs to adjust the inlet and outlet cooling liquid temperature of the air inlet and outlet side 17, the machining position of the arc-shaped groove 8 of the pin body 9 can be adjusted to quickly adjust the installation position of the pin body 9, so as to change the flow of the cooling liquid in the inlet flow channel part 6 and the outlet flow channel part 7. The method of the present application has the advantages of simple modification, high flexibility, short cycle and low cost compared with the traditional modification method. Furthermore, the mold structure for producing the cylinder of the present application is simpler than that of the traditional method, and is easy to process and has lower cost.

[0087] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An engine cylinder block, characterized in that: Including cylinder body, cylinder liner and split parts; The cylinder body is sleeved on the cylinder liner, and a flow channel for circulating coolant is formed between the cylinder body and the cylinder liner; The cylinder body and the cylinder sleeve are both formed with limiting portions on the side walls facing each other at a preset position, and an installation space is surrounded by the two limiting portions facing each other at the preset position; the dividing member is arranged in the installation space; There are multiple preset positions, and any two of the preset positions are provided with the dividing pieces to divide the flow channel into an inlet channel portion and an outlet channel portion.

2. The engine block according to claim 1, wherein: The dividing piece is adjusted to different preset positions to adjust the volumes of the inlet channel portion and the outlet channel portion, so that the heat exchange efficiency can be adjusted.

3. The engine block according to claim 1, wherein: The limiting portion is an arc-shaped groove; The arc-shaped groove on the cylinder body and the arc-shaped groove on the cylinder sleeve are bent toward the facing side walls at the preset position to enclose the installation space.

4. The engine block according to claim 3, characterized in that: The arc-shaped groove extends along the axial direction of the cylinder body.

5. The engine block according to claim 1, wherein: The splitting piece is a pin body; The size of the pin body near the cylinder head is the same as the size of the installation space, and a gap is formed between the pin body and the side wall of the cylinder body and / or the side wall of the cylinder liner except for at least the portion near the cylinder head; The coolant can flow between the inlet channel portion and the outlet channel portion through the gap.

6. The engine block according to claim 5, characterized in that: The pin body is sequentially formed with a sealing cap portion and a transition portion along its axial direction; The sealing cap portion is close to the cylinder head and has the same size as the installation space; The size of the transition portion is smaller than that of the sealing cap portion, so that a gap is formed between the transition portion and the side wall of the cylinder body and / or the side wall of the cylinder liner.

7. The engine block according to claim 6, characterized in that: The transition portion includes a first transition section and a second transition section connected to each other; One end of the first transition section facing away from the second transition section is connected to the sealing cap; The size of the first transition section is smaller than that of the second transition section, and the size of the second transition section is smaller than that of the sealing cap portion, so that the size of the gap decreases gradually from the sealing cap portion to the second transition section.

8. The engine cylinder block according to any one of claims 5 to 7, characterized in that: The pin body is made of thermoplastic resin.

9. An engine, characterized in that: An engine block comprising a cylinder head and the engine block according to any one of claims 1 to 7; The cylinder head is buckled on the engine cylinder body; The cylinder head has a flow guide channel, and the two ends of the flow guide channel are respectively connected to the inlet channel portion and the outlet channel portion; The coolant flows through the inlet channel, the flow guide channel, and the outlet channel in sequence.

10. The engine according to claim 9, characterized in that The engine cylinder body is provided with an air intake side, an exhaust side, a water inlet and a water outlet; The exhaust side and the water inlet are located on the same side; the air inlet side and the water outlet are located on the same side; The coolant is guided to the inlet channel portion through the water inlet and can be discharged from the outlet channel portion through the water outlet.

Images