Engine and motorcycle

Abstract

The utility model provides a kind of engine and motorcycle, it is related to engine technical field.The utility model provides a kind of engine and motorcycle, relative to the prior art using hose or steel pipe connection, first built-in flow passage is set in the cylinder body in the application, first built-in flow passage is set in the inside of cylinder body and is communicated cooling flow passage and drive pump structure, the connection structure of cooling waterway is simple, it also reduces the use of external hose or steel pipe, simultaneously, it is more conducive to engine lightweight design in this way;On the other hand, by setting first built-in flow passage and second built-in flow passage, the multiple water inlets of cooling flow passage are realized, and the cooling effect of multiple water inlets of cylinder body is better, and the cooling dead angle of cooling flow passage can also be removed, to solve the problem of uniformity of cylinder body cooling.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically, to an engine and a motorcycle. Background Technology

[0002] In the related technology of compact two-cylinder scooters, the engine installation space is relatively small. Therefore, the utilization rate of the engine internal space and the size of the whole vehicle are affected by the installation of the entire cooling system and the water circuit layout.

[0003] For example, if the water pump of the cooling system is located far from the housing, a flexible hose or steel pipe needs to be used to connect the water pump outlet and the housing inlet. This results in a long water path and high water resistance, leading to poor cooling effect and affecting the overall aesthetics. Utility Model Content

[0004] The purpose of this utility model is to provide an engine and a motorcycle, wherein the engine has a shorter cooling water path, occupies less space, has less water resistance, has a better engine cooling effect, and is easier to assemble and maintain.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides an engine, comprising: The main body includes a connected housing and a cylinder body. The cylinder body is provided with a connected cooling channel, a first internal channel and a second internal channel, and the cooling channel is arranged around the cylinder barrel. A drive pump structure is disposed on the body and close to the cylinder block, and the drive pump structure is used to drive coolant from the first built-in flow channel and the second built-in flow channel into the cooling flow channel.

[0006] In an optional embodiment, the drive pump structure is disposed at the bottom of the housing, and the first built-in flow channel is located at the bottom of the cylinder body; The second built-in flow channel is located at the top of the cylinder block.

[0007] In an optional embodiment, the body includes a left crankshaft cover located on one side of the housing, and the drive pump structure is disposed on the left crankshaft cover. The drive pump structure, the left crankshaft cover, and the housing are sequentially and sealed together.

[0008] In an optional embodiment, the first built-in flow channel is positioned near the mating surface where the left crankshaft cover connects to the housing.

[0009] In an optional embodiment, the left crankshaft cover is provided with a second flow channel, the second flow channel having a first outlet and a second outlet, the first outlet being connected to the first internal flow channel, and the second outlet being connected to the second internal flow channel.

[0010] In an optional embodiment, the housing is provided with a third flow channel located at the bottom of the housing, the third flow channel connecting the second flow channel and the first built-in flow channel.

[0011] In an optional implementation, the third flow channel is built into the housing and smoothly transitions to the first built-in flow channel.

[0012] In an optional embodiment, the engine further includes an external water supply pipe that connects the second internal flow channel to the drive pump structure, and the water supply pipe is arranged around the outer wall of the cylinder block.

[0013] In an optional embodiment, the body includes a left crankshaft cover located on one side of the housing. The drive pump structure includes a drive pump, an impeller, and a water pump cover. The drive pump is integrated into the bottom of the left crankshaft cover. A pump chamber is formed between the water pump cover and the drive pump. The impeller is disposed in the pump chamber and is drivenly connected to the output end of the drive pump. The pump chamber is connected to the cooling channel through the first built-in flow channel and the second built-in flow channel. The drive pump is used to drive the impeller to rotate, so that the rotating impeller guides the coolant into the cooling channel from the first built-in flow channel and the second built-in flow channel respectively.

[0014] Secondly, this utility model provides a motorcycle, including the engine described in any of the foregoing embodiments.

[0015] The beneficial effects of the engine and motorcycle provided by this utility model embodiment include: On the one hand, compared with the existing technology that uses hoses or steel pipes for connection, this application sets a first built-in flow channel in the cylinder body. The first built-in flow channel is set inside the cylinder body and connects the cooling flow channel and the drive pump structure. The connection structure of the cooling water circuit is simple and the use of external hoses or steel pipes is reduced. At the same time, this is more conducive to the lightweight design of the engine. On the other hand, by setting a first built-in flow channel and a second built-in flow channel, multiple water inlets of the cooling flow channel are realized. The cooling effect of multiple water inlets of the cylinder body is better. At the same time, the cooling dead corners of the cooling flow channel can be eliminated, and the problem of uniform cooling of the cylinder body can be solved.

[0016] Furthermore, compared to the prior art where the water pump is located far from the cylinder block, this application, by setting a drive pump structure close to the cylinder block, shortens the distance from the outlet of the drive pump structure to the first internal flow channel, making the first internal flow channel shorter, reducing the flow resistance of the coolant, and improving the engine cooling effect.

[0017] Furthermore, by incorporating a third flow channel within the housing, a second flow channel within the left crankshaft housing cover, and a first and second built-in flow channel within the cylinder block, the seal between the flow channels can be achieved simply by connecting the water pump cover, the left crankshaft cover, and the housing with a sealing gasket. This eliminates the need for additional components to seal the water circuit, resulting in lower costs and a simpler assembly process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the engine without the water pump cover provided in this embodiment; Figure 2 This is a schematic diagram of the engine structure provided in this embodiment; Figure 3 for Figure 2 A partial sectional view of AA; Figure 4 for Figure 2 A partial sectional view of BB; Figure 5 for Figure 2 A partial sectional view of CC.

[0020] Icons: 010-Engine; 100-Body; 110-Box; 111-Third flow channel; 120-Cylinder block; 121-Cylinder barrel; 122-Cooling flow channel; 123-First internal flow channel; 124-Second internal flow channel; 130-Left crankshaft cover; 131-Second flow channel; 132-First outlet; 133-Second outlet; 200-Drive pump structure; 210-Drive pump; 212-Pump shaft; 213-Bearing; 214-Oil seal; 215-Water seal dynamic and static ring structure; 216-Flat washer; 220-Impeller; 230-Water pump cover; 231-Pump chamber; 232-First flow channel; 233-Sealing ring; 240-Oil pump assembly; 300-Sealing gasket; 400-Water supply pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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 utility model.

[0025] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0027] The following describes in detail the overall structure, working principle, and technical effects of the engine 010 and motorcycle provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0028] Please refer to Figures 1-2 The engine 010 provided by this utility model is used to cool the engine 010 of a motorcycle.

[0029] Please refer to Figures 1-2 This utility model provides an engine 010, comprising: The main body 100 includes a box 110 and a cylinder body 120 connected to each other. The cylinder body 120 is provided with a connected cooling channel 122, a first internal channel 123 and a second internal channel 124. The cooling channel 122 is arranged around the cylinder barrel 121. The drive pump structure 200 is disposed on the body 100 and close to the cylinder block 120. The drive pump structure 200 is used to drive the coolant from the first built-in flow channel 123 and the second built-in flow channel 124 into the cooling flow channel 122.

[0030] It is understandable that the drive pump structure 200 drives the coolant from the first built-in flow channel 123 and the second built-in flow channel 124 built into the cylinder block 120 to the cooling flow channel 122, thereby cooling the cylinder block 120.

[0031] As can be seen from the above, on the one hand, compared with the existing technology that uses hoses or steel pipes for connection, this application sets a first built-in flow channel 123 and a second built-in flow channel 124 inside the cylinder block 120. The first built-in flow channel 123 and the second built-in flow channel 124 are set inside the cylinder block 120 and connect the cooling flow channel 122 and the drive pump structure 200, which simplifies the connection structure of the entire cooling water circuit and reduces the use of external hoses or steel pipes. At the same time, this is more conducive to the lightweight design of the engine 010. On the other hand, by setting the first built-in flow channel 123 and the second built-in flow channel 124, multiple water inlets of the cooling flow channel 122 are realized, and the cooling effect of multiple water inlets of the cylinder block 120 is better. At the same time, the cooling dead corners of the cooling flow channel 122 can be eliminated, and the problem of cooling uniformity of the cylinder block 120 can be solved.

[0032] In this embodiment, please refer to Figures 1-2 The engine 010 includes a body 100, which includes a connected housing 110 and a cylinder block 120. Please refer to [reference needed]. Figure 5 The cylinder block 120 is provided with a connected cooling channel 122, a first internal channel 123 and a second internal channel 124, and the cooling channel 122 is arranged around the cylinder barrel 121.

[0033] In this embodiment, please refer to Figures 1-2 The main body 100 also includes a left crankshaft cover 130 and a right crankshaft cover. The left crankshaft cover 130 is located on one side of the housing 110 and is connected to the housing 110. The right crankshaft cover is located on the other side of the housing 110 and is connected to the housing 110.

[0034] The drive pump structure 200 is mounted on the left crankshaft cover 130, and the drive pump structure 200, the left crankshaft cover 130, and the housing 110 are sequentially and sealed together.

[0035] The left crankshaft cover 130 and cylinder block 120 are all sealed to the housing 110 by a sealing gasket 300.

[0036] Optionally, engine 010 is a parallel twin-cylinder engine 010, please refer to... Figure 5 In this case, there are two cylinders 121 arranged side by side, and the cooling channel 122 forms an "8"-shaped water channel around the two cylinders 121. Of course, in other embodiments, the engine 010 can also be a single-cylinder engine 010, in which case there is one cylinder 121, and the cooling channel 122 forms an arc-shaped water channel around one cylinder 121.

[0037] In this embodiment, please refer to Figure 5 The drive pump structure 200 is located at the bottom of the housing 110, the first built-in flow channel 123 is located at the bottom of the cylinder body 120, and the second built-in flow channel 124 is located at the top of the cylinder body 120. Of course, in other embodiments, the first built-in flow channel 123 and the second built-in flow channel 124 are also located on the left and right sides of the cylinder body 120, respectively.

[0038] Understandably, on the one hand, by using the first built-in flow channel 123 at the bottom of the cylinder block 120 and the second built-in flow channel 124 at the top of the cylinder block 120, multiple water inlets are achieved in the cooling flow channel 122, resulting in better cooling effect for the cylinder block 120. Simultaneously, it eliminates cooling dead zones in the cooling flow channel 122, solving the problem of uniform cooling in the cylinder block 120. On the other hand, compared to the prior art where the water pump is positioned far from the cylinder block, this application shortens the distance from the outlet of the drive pump structure 200 to the first built-in flow channel 123 by placing the drive pump structure 200 close to the cylinder block 120. This makes the first built-in flow channel 123 shorter, reduces the flow resistance of the coolant, and improves the cooling effect of the engine 010.

[0039] In this embodiment, the first built-in flow channel 123 is located near the mating surface where the left crankshaft cover 130 connects to the housing 110.

[0040] In this embodiment, please refer to Figure 4 The left crankshaft cover 130 is provided with a second flow channel 131. The second flow channel 131 is provided with a first outlet 132 and a second outlet 133. The first outlet 132 is connected to the first internal flow channel 123, and the second outlet 133 is connected to the second internal flow channel 124.

[0041] In this embodiment, please refer to Figure 4 The housing 110 is provided with a third flow channel 111 located at the bottom of the housing 110. The third flow channel 111 connects the second flow channel 131 and the first built-in flow channel 123. The third flow channel 111 is built into the housing 110 and smoothly transitions to the first built-in flow channel 123.

[0042] Understandably, please refer to Figure 4 The drive pump structure 200, the second flow channel 131 and the third flow channel 111 are connected in sequence so that the coolant in the pump chamber 231 can enter the cooling flow channel 122 through the built-in water passages, the first built-in flow channel 123 and the second built-in flow channel 124 respectively.

[0043] It is worth mentioning that in the prior art, the outlet of the water pump cover 230 of the cooling system is directly connected to the inlet of the housing 110. This results in the inlet of the housing 110 extending too far beyond the outer edge of the mating surface, and the gap between the protruding section and the cover is too small, making it difficult to disassemble and assemble the cover. The fastening bolts of the water pump cover 230 and the housing 110 are too close to the frame, making disassembly and assembly difficult. Furthermore, it is difficult to ensure the compression of the sealing ring 233, posing a risk of water leakage.

[0044] Therefore, this application achieves sealing between the flow channels by incorporating a third flow channel 111 in the housing 110, a second flow channel 131 in the left crankshaft housing cover, and a first built-in flow channel 123 and a second built-in flow channel 124 in the cylinder block 120. This requires only a sealing connection between the left crankshaft cover 130 and the housing 110 via a sealing gasket 300, eliminating the need for additional components to seal the water passages. This results in lower costs, a simpler assembly process, and a simpler sealing structure, making assembly and maintenance easier. Furthermore, the integrated design of the drive pump structure 200 with the housing 110 reduces the space required for the engine 010 cooling system, minimizes the need for external hoses or steel pipes, and facilitates a lighter engine 010 design.

[0045] In this embodiment, please refer to Figure 1 and Figure 2 The engine 010 also includes an external water supply pipe 400, which connects the second internal flow channel 124 to the drive pump structure 200. The water supply pipe 400 is arranged around the outer wall of the cylinder block 120.

[0046] Specifically, please refer to Figure 4 The second built-in flow channel 124 is connected to the second outlet 133 on the second flow channel 131.

[0047] In this embodiment, please refer to Figure 1 and Figure 2 The engine 010 includes a drive pump structure 200, which is disposed on the body 100 and close to the cylinder block 120. The drive pump structure 200 is used to drive coolant from the first built-in flow channel 123 and the second built-in flow channel 124 into the cooling flow channel 122.

[0048] Specifically, the drive pump structure 200 is located at the bottom of the housing 110, and the first internal flow channel 123 is located at the bottom of the cylinder block 120. This arrangement shortens the distance from the outlet of the drive pump structure 200 to the first internal flow channel 123, making the first internal flow channel 123 shorter, reducing the flow resistance of the coolant, and improving the cooling effect of the engine 010.

[0049] In this embodiment, please refer to Figure 3 The drive pump structure 200 includes a drive pump 210, an impeller 220, and a pump cover 230. The drive pump 210 is integrated into the bottom of the left crankshaft cover 130. A pump chamber 231 is formed between the pump cover 230 and the drive pump 210. The impeller 220 is disposed in the pump chamber 231 and is drivenly connected to the output end of the drive pump 210. The pump chamber 231 is connected to the cooling channel 122, the first internal channel 123, and the second internal channel 124. The drive pump 210 is used to drive the impeller 220 to rotate so that the rotating impeller 220 guides the coolant from the first internal channel 123 and the second internal channel 124 into the cooling channel 122.

[0050] The bottom of the housing 110 is equipped with an oil pump assembly 240. Specifically, the cylinder block 120 is located on the left side of the housing 110, and the oil pump assembly 240 and the drive pump structure 200 are located on the lower left side of the housing 110.

[0051] In this embodiment, please refer to Figure 3 The drive pump 210 includes a pump shaft 212, which passes through the left crankshaft cover 130. One end of the pump shaft 212 is connected to the oil pump assembly 240, and the other end of the pump shaft 212 is connected to the impeller 220. At least one bearing 213, an oil seal 214, and a water seal dynamic and static ring structure 215 are also sequentially mounted on the pump shaft 212.

[0052] Optionally, the pump shaft 212 may be fitted with one, two or three bearings 213 so that when the oil pump assembly 240 drives the pump 210 shaft to rotate, the pump shaft 212 can rotate relative to the left crankshaft cover 130.

[0053] Specifically, an oil seal 214 is fitted on the pump shaft 212. The pump shaft 212 and the oil seal 214 are interference-fitted for dynamic sealing to prevent lubricant leakage and the intrusion of external debris.

[0054] Specifically, a water seal dynamic and static ring structure 215 is fitted onto the pump shaft 212. The water seal dynamic and static ring structure 215 is used to seal the internal cavity of the left crankshaft cover 130 to prevent coolant from entering. The water seal dynamic and static ring structure 215 is also sealed to the impeller 220 by a flat washer 216.

[0055] It is understandable that the working principle of the drive pump structure 200 is as follows: First, coolant is introduced into the pump chamber 231; the drive pump structure 200 is started, the oil pump assembly 240 drives the pump 210 shaft to rotate, the pump shaft 212 drives the drive impeller 220 to rotate, the impeller 220 rotates and guides the coolant from the first built-in flow channel 123 and the second built-in flow channel 124 into the cooling flow channel 122 to uniformly cool the cylinder block 120.

[0056] In this embodiment, please refer to Figure 1 and Figure 4 The pump cover 230 also has a first flow channel 232, one end of which is connected to the pump chamber 231, and the other end is connected to the first built-in flow channel 123 and the second built-in flow channel 124.

[0057] Understandably, this configuration of the first flow channel 232 being similar to the first internal flow channel 123 results in the first internal flow channel 123 being extremely short, having low water resistance, and providing good cooling for the engine 010.

[0058] In this embodiment, please refer to Figure 4 The water pump cover 230, drive pump 210, left crankshaft cover 130 and housing 110 are connected in sequence, and the water pump cover 230, drive pump 210, left crankshaft cover 130 and housing 110 are connected in sequence with a sealing connection.

[0059] Please refer to Figure 3 The water pump cover 230 and the left crankshaft cover 130 can be sealed by an O-ring 233.

[0060] This utility model also proposes a motorcycle, including the engine 010 in the above embodiments.

[0061] Among them, the motorcycle can be a motorcycle, a scooter, a single-cylinder motorcycle, a twin-cylinder motorcycle or a parallel twin-cylinder motorcycle, etc. The above models are only examples, and this application does not limit the models to which engine 010 is applicable.

[0062] The working principle and process of the engine 010 and motorcycle provided in this embodiment of the utility model are as follows: First, coolant is introduced into pump chamber 231.

[0063] Next, the drive pump structure 200 is activated, and the oil pump assembly 240 drives the pump 210 shaft to rotate. The pump shaft 212 drives the drive impeller 220 to rotate, and the impeller 220 rotates and guides the coolant flow. On one hand, the coolant flows sequentially through the pump chamber 231, the first flow channel 232, the second flow channel 131, the first outlet 132, the third flow channel 111, and the first internal flow channel 123 into the cooling flow channel 122, so that the coolant enters the cooling flow channel 122 of the cylinder block 120 from the bottom. The cylinder block 120 is cooled by a short water path, which reduces the overall water resistance and improves the cooling effect. On the other hand, the coolant also flows sequentially through the pump chamber 231, the first flow channel 232, the second flow channel 131, the second outlet 133, the water supply pipe 400, and the second internal flow channel 124 into the cooling flow channel 122. This allows the coolant to enter the cooling flow channel 122 of the cylinder block 120 from the top, eliminating cooling dead zones in the cooling flow channel 122 and ensuring the uniformity of cooling of the cylinder block 120.

[0064] Finally, the coolant that has circulated within the cooling channel 122 returns to the pump chamber 231 of the drive pump structure 200 through the return port.

[0065] In summary, the engine 010 and motorcycle provided by this utility model embodiment, on the one hand, compared with the prior art that uses hoses or steel pipes for connection, this application provides a first built-in flow channel 123 in the cylinder block 120. The first built-in flow channel 123 is located inside the cylinder block 120 and connects the cooling flow channel 122 and the drive pump structure 200. The connection structure of the cooling water circuit is simple, and the use of external hoses or steel pipes is reduced. At the same time, this is more conducive to the lightweight design of the engine 010. On the other hand, by setting the first built-in flow channel 123 and the second built-in flow channel 124, multiple water inlets of the cooling flow channel 122 are realized, and the cooling effect of multiple water inlets of the cylinder block 120 is better. At the same time, the cooling dead corners of the cooling flow channel 122 can be eliminated, and the problem of cooling uniformity of the cylinder block 120 can be solved.

[0066] Furthermore, compared to the prior art where the water pump is located far from the cylinder block, this application shortens the distance from the outlet of the drive pump structure 200 to the first internal flow channel 123 by setting the drive pump structure 200 close to the cylinder block 120. This makes the first internal flow channel 123 shorter, reduces the flow resistance of the coolant, and improves the cooling effect of the engine 010.

[0067] Furthermore, by incorporating a third flow channel 111 in the housing 110, a second flow channel 131 in the left crankshaft housing cover, and a first built-in flow channel 123 and a second built-in flow channel 124 in the cylinder block 120, the seal between the flow channels can be achieved simply by sealing the water pump cover 230, the left crankshaft cover 130, and the housing 110 with a sealing gasket 300. No other parts are needed to seal the water passages, resulting in lower costs and a simpler assembly process.

[0068] Furthermore, the integrated design of the drive pump structure 200 and the housing 110 helps to reduce the space required for the engine 010 cooling system, reduce the number of external hoses or steel pipes, and facilitates the lightweight design of the engine 010.

[0069] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An engine, characterized in that, include: The main body (100) includes a box (110) and a cylinder (120) connected to each other. The cylinder (120) is provided with a connected cooling channel (122), a first internal channel (123) and a second internal channel (124). The cooling channel (122) is arranged around the cylinder (121). A drive pump structure (200) is disposed on the body (100) and close to the cylinder block (120). The drive pump structure (200) is used to drive coolant from the first built-in flow channel (123) and the second built-in flow channel (124) into the cooling flow channel (122).

2. The engine according to claim 1, characterized in that, The drive pump structure (200) is disposed at the bottom of the housing (110), and the first built-in flow channel (123) is located at the bottom of the cylinder body (120); The second built-in flow channel (124) is located on top of the cylinder block (120).

3. The engine according to claim 1, characterized in that, The main body (100) includes a left crankshaft cover (130), which is located on one side of the housing (110). The drive pump structure (200) is disposed on the left crankshaft cover (130), and the drive pump structure (200), the left crankshaft cover (130), and the housing (110) are sequentially and sealed together.

4. The engine according to claim 3, characterized in that, The first built-in flow channel (123) is located near the mating surface where the left crankshaft cover (130) connects to the housing (110).

5. The engine according to claim 4, characterized in that, The left crankshaft cover (130) is provided with a second flow channel (131), the second flow channel (131) is provided with a first outlet (132) and a second outlet (133), the first outlet (132) is connected to the first internal flow channel (123), and the second outlet (133) is connected to the second internal flow channel (124).

6. The engine according to claim 5, characterized in that, The housing (110) is provided with a third flow channel (111) located at the bottom of the housing (110), and the third flow channel (111) connects the second flow channel (131) and the first built-in flow channel (123).

7. The engine according to claim 6, characterized in that, The third flow channel (111) is built into the box (110) and smoothly transitions to the first built-in flow channel (123).

8. The engine according to claim 2, characterized in that, The engine (010) also includes an external water supply pipe (400), which connects the second internal flow channel (124) to the drive pump structure (200), and the water supply pipe (400) is arranged around the outer wall of the cylinder block (120).

9. The engine according to claim 1, characterized in that, The main body (100) includes a left crankshaft cover (130), which is located on one side of the housing (110). The drive pump structure (200) includes a drive pump (210), an impeller (220), and a water pump cover (230). The drive pump (210) is integrated into the bottom of the left crankshaft cover (130). A pump chamber (231) is formed between the water pump cover (230) and the drive pump (210). The impeller (220) is disposed in the pump chamber (231) and is drivenly connected to the output end of the drive pump (210). The pump chamber (231) is connected to the cooling channel (122) through the first built-in flow channel (123) and the second built-in flow channel (124). The drive pump (210) is used to drive the impeller (220) to rotate so that the rotating impeller (220) guides the coolant from the first built-in flow channel (123) and the second built-in flow channel (124) into the cooling flow channel (122).

10. A motorcycle, characterized in that, Includes the engine (010) as described in any one of claims 1-9.

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