Engine assembly and motorcycle

Abstract

The present invention discloses an engine assembly and a motorcycle. The engine assembly includes an engine, a radiator, an oil cooler, an oil filter and a pipeline assembly. The oil cooler is connected in series between the engine and the oil filter. The oil cooler is used to cool the oil entering the oil filter from the engine. The pipeline assembly includes a first inlet pipe and a first outlet pipe. The two ends of the first inlet pipe are respectively connected to the engine and the radiator so that the cooling medium after heat exchange with the engine flows back to the radiator. The two ends of the first outlet pipe are respectively connected to the radiator and the engine so that the cooling medium after heat dissipation through the radiator returns to the engine and exchanges heat with the engine. The pipeline assembly also includes a second inlet pipe. The two ends of the second inlet pipe are respectively connected to the first outlet pipe and the oil cooler so that a part of the cooling medium in the first outlet pipe enters the oil cooler through the second inlet pipe and exchanges heat with the oil in the oil cooler. The motorcycle includes the above-mentioned engine assembly.

Description

Technical Field

[0001] The present application relates to the technical field of motorcycles, and in particular to an engine assembly and a motorcycle. Background Art

[0002] The engine generates a lot of heat during operation. This heat needs to be transferred outside the engine to reduce the temperature of the engine components and ensure their normal operation. Some of this heat is dissipated to the outside through the radiator, while the rest is transferred to the engine oil, causing the oil temperature to increase.

[0003] When engine oil temperature is too high, its lubricating properties deteriorate, impacting engine performance. Therefore, conventional engines are typically equipped with an oil cooler, which uses a cooling medium to exchange heat with the oil, thereby lowering the oil's temperature. However, the cooling medium's piping layout is complex, requiring significant space and easily interfering with other piping and components. Summary of the Invention

[0004] Based on this, an engine assembly and a motorcycle are provided to address the problem of complex piping arrangement of the cooling medium of the oil cooler.

[0005] The technical solution is as follows:

[0006] In one aspect, the present application provides an engine assembly, comprising an engine, a radiator, an oil cooler, an oil filter, and a piping assembly, wherein the oil cooler is connected in series between the engine and the oil filter, and is used to cool the oil entering the oil filter from the engine;

[0007] The pipe assembly includes a first inlet pipe and a first outlet pipe, wherein both ends of the first inlet pipe are respectively connected to the engine and the radiator so that the cooling medium after heat exchange with the engine flows back to the radiator, and the both ends of the first outlet pipe are respectively connected to the radiator and the engine so that the cooling medium after heat dissipation through the radiator returns to the engine and exchanges heat with the engine;

[0008] The pipeline assembly also includes a second inlet pipe, and both ends of the second inlet pipe are respectively connected to the first outlet pipe and the oil cooler, so that a portion of the cooling medium in the first outlet pipe enters the oil cooler through the second inlet pipe and exchanges heat with the oil in the oil cooler.

[0009] In the above-mentioned engine assembly, the cooling medium forms a cycle through the engine, the first inlet pipe, the radiator and the first outlet pipe. The cooling medium exchanges heat with the engine to take away part of the heat from the engine. The cooling medium after heat exchange enters the radiator through the first inlet pipe and dissipates the heat, and then enters the engine again through the first outlet pipe for heat exchange; another part of the heat from the engine is transferred to the engine oil, which is cooled by the oil cooler and then enters the oil filter for filtration. The oil entering the oil cooler exchanges heat with the cooling medium entering through the second inlet pipe to achieve cooling of the engine oil; since the cooling medium of the oil cooler is directly taken from the first outlet pipe, on the one hand, there is no need to introduce a new cold source pipeline, which reduces the complexity of the structure; on the other hand, it avoids interference with other components or pipelines caused by the newly added cold source pipeline, and also reduces space occupancy.

[0010] The technical solution is further described below:

[0011] In one embodiment, the first outlet pipe is provided with a first liquid outlet joint, and the second inlet pipe is connected to the first outlet pipe through the first liquid outlet joint. The extension direction of the first liquid outlet joint is set at an acute angle to the flow direction of the cooling medium in the first outlet pipe, so that a portion of the cooling medium in the first outlet pipe flows downstream into the second inlet pipe.

[0012] In one embodiment, the pipeline assembly further includes a second outlet pipe, both ends of which are respectively connected to the oil cooler and the first outlet pipe, so that the cooling medium in the oil cooler after heat exchange with the oil flows back to the first outlet pipe.

[0013] In one embodiment, the first outlet pipe is further provided with a first liquid inlet joint, and the second outlet pipe is connected to the first outlet pipe through the first liquid inlet joint. The extension direction of the first liquid inlet joint is arranged at an obtuse angle to the flow direction of the cooling medium in the first outlet pipe, so that the cooling medium in the oil cooler, after heat exchange with the oil, flows back to the first outlet pipe downstream.

[0014] In one embodiment, the first liquid inlet joint and the first liquid outlet joint are spaced apart from each other in the first outlet pipe, and the first liquid inlet joint is located upstream of the first liquid outlet joint in the flow direction of the cooling medium in the first outlet pipe; or

[0015] The first liquid inlet joint and the first liquid outlet joint are spaced apart from each other in the first outlet pipe, and the first liquid inlet joint is located downstream of the first liquid outlet joint in the flow direction of the cooling medium in the first outlet pipe.

[0016] In one embodiment, the first liquid inlet connector is provided with a bending portion, the bending portion is provided at an end of the first liquid inlet connector away from the first outlet pipe, and the second outlet pipe is connected to the first outlet pipe through the bending portion.

[0017] In one embodiment, the first inlet pipe is located on one side of the engine, and the second inlet pipe and the second outlet pipe are both located on a side of the first inlet pipe away from the engine.

[0018] In one embodiment, the oil cooler is provided with a second liquid inlet joint and a second liquid outlet joint, and the second liquid inlet joint and the second liquid outlet joint are arranged on the side of the oil cooler facing the first outlet pipe; the second inlet pipe is connected to the oil cooler through the second liquid inlet joint, and the second outlet pipe is connected to the oil cooler through the second liquid outlet joint.

[0019] In one embodiment, the second inlet pipe is bendable, and the second inlet pipe is bent toward a side away from the radiator; or / and the second outlet pipe is bendable, and the second outlet pipe is bent toward a side away from the radiator.

[0020] On the other hand, the present application also provides a motorcycle comprising an engine assembly as described in any of the above technical solutions.

[0021] The above-mentioned motorcycle includes the aforementioned engine assembly, and the cooling medium forms a cycle through the engine, the first inlet pipe, the radiator and the first outlet pipe. The cooling medium exchanges heat with the engine to remove part of the heat from the engine. The cooling medium after heat exchange enters the radiator through the first inlet pipe and dissipates the heat, and then enters the engine again through the first outlet pipe for heat exchange; another part of the heat of the engine is transferred to the engine oil, which is cooled by the oil cooler and then enters the oil filter for filtration. The oil entering the oil cooler exchanges heat with the cooling medium entering through the second inlet pipe to achieve cooling of the engine oil; because the cooling medium of the oil cooler is directly taken from the first outlet pipe, on the one hand, there is no need to introduce a new cold source pipeline, which reduces the complexity of the structure; on the other hand, it avoids interference with other components or pipelines caused by the newly added cold source pipeline, and also reduces space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn to true scale.

[0025] Figure 1 This is a perspective view of an engine assembly according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 Another perspective view of the engine assembly in the embodiment;

[0027] Figure 3 for Figure 1 Another perspective view of the engine assembly in the embodiment;

[0028] Figure 4 for Figure 1 Arrangement diagram of the first inlet pipe, the first outlet pipe, the second inlet pipe and the second outlet pipe in the embodiment;

[0029] Figure 5 for Figure 1 A schematic diagram of the connection between the oil cooler, the second inlet pipe, the second outlet pipe and the first outlet pipe in the embodiment;

[0030] Figure 6 Schematic diagram of the connection of the oil cooler, the second inlet pipe, the second outlet pipe and the first outlet pipe in another embodiment.

[0031] Description of the accompanying drawings:

[0032] 100. Engine; 200. Radiator; 300. Oil cooler; 310. Second liquid inlet connector; 320. Second liquid outlet connector; 400. Oil filter; 510. First inlet pipe; 520. First outlet pipe; 521. First liquid outlet connector; 522. First liquid inlet connector; 5221. Bend; 530. Second inlet pipe; 540. Second outlet pipe. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0034] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] The motorcycle is powered by an engine 100 to achieve travel. The engine 100, together with components such as a radiator 200 and an oil filter 400, constitute an engine 100 assembly to be assembled on a motorcycle body.

[0036] Please refer to Figures 1 to 4 The present application provides an engine 100 assembly, including an engine 100, a radiator 200, an oil cooler 300, an oil filter 400 and a pipeline assembly. The oil cooler 300 is connected in series between the engine 100 and the oil filter 400. The oil cooler 300 is used to cool the oil entering the oil filter 400 from the engine 100.

[0037] like Figures 1 to 3 As shown, the pipeline assembly includes a first inlet pipe 510 and a first outlet pipe 520. The two ends of the first inlet pipe 510 are respectively connected to the engine 100 and the radiator 200, so that the cooling medium after heat exchange with the engine 100 flows back to the radiator 200. The two ends of the first outlet pipe 520 are respectively connected to the radiator 200 and the engine 100, so that the cooling medium after heat dissipation through the radiator 200 returns to the engine 100 and exchanges heat with the engine 100.

[0038] The engine 100 is provided with a first heat exchange cavity, and the radiator 200 is provided with a second heat exchange cavity. The two ends of the first inlet pipe 510 are respectively connected to one end of the first heat exchange cavity and one end of the second heat exchange cavity, and the two ends of the first outlet pipe 520 are respectively connected to the other end of the first heat exchange cavity and the other end of the second heat exchange cavity to form a first cooling circulation system, and the cooling medium circulates in the first cooling circulation system.

[0039] When the cooling medium flows in the first heat exchange cavity, the cooling medium exchanges heat with the engine 100 and absorbs part of the heat of the engine 100. Then, the cooling medium after absorbing the heat dissipates the heat on the radiator 200. Then, the temperature of the cooling medium after heat dissipation decreases, and then it returns to the engine 100 for heat exchange again. This cycle is repeated to achieve cyclic cooling of the engine 100.

[0040] Optionally, the radiator 200 may dissipate heat from the cooling medium through air cooling or through a heat exchange medium.

[0041] Optionally, the second heat exchange cavity can be an internal channel of the flat tube or fin on the radiator 200, and the cooling medium exchanges heat with the external air in an air-cooling manner to cool the heat exchange medium flowing back into the radiator 200 through the first inlet pipe 510.

[0042] like Figure 4 As shown, the pipeline assembly also includes a second inlet pipe 530, and both ends of the second inlet pipe 530 are respectively connected to the first outlet pipe 520 and the oil cooler 300, so that a portion of the cooling medium in the first outlet pipe 520 enters the oil cooler 300 through the second inlet pipe 530 and exchanges heat with the oil in the oil cooler 300.

[0043] The second inlet pipe 530 is directly connected to the first outlet pipe 520, so that a portion of the cooling medium flowing from the radiator 200 toward the engine 100 through the first outlet pipe 520 enters the second inlet pipe 530, and further enters the oil cooler 300 through the second inlet pipe 530 to exchange heat with the heated oil to cool the oil, so that the cold source of the oil cooler 300 is directly taken from the cooling medium of the radiator 200.

[0044] The engine assembly 100 can be applied to a motorcycle. A cooling medium forms a cycle through the engine 100, the first inlet pipe 510, the radiator 200, and the first outlet pipe 520. The cooling medium exchanges heat with the engine 100 to remove a portion of the heat from the engine 100. The heat-exchanged cooling medium then enters the radiator 200 through the first inlet pipe 510 to dissipate the heat, and then re-enters the engine 100 through the first outlet pipe 520 for heat exchange. Another portion of the heat from the engine 100 is transferred to the engine oil. The oil is cooled by the oil cooler 300 and then filtered by the oil filter 400. The oil in the oil cooler 300 exchanges heat with the cooling medium entering through the second inlet pipe 530 to achieve cooling of the oil. Because the cooling medium of the oil cooler 300 is directly drawn from the first outlet pipe 520, there is no need to introduce a new cooling source pipeline, reducing structural complexity. Furthermore, interference with other components or pipelines caused by the newly added cooling source pipeline is avoided, and space occupation is also reduced.

[0045] Optionally, the cooling medium is liquid water.

[0046] In one embodiment, please refer to Figure 4 The first outlet pipe 520 is provided with a first liquid outlet joint 521, and the second inlet pipe 530 is connected to the first outlet pipe 520 through the first liquid outlet joint 521. The extension direction of the first liquid outlet joint 521 is set at an acute angle to the flow direction of the cooling medium in the first outlet pipe 520, so that a part of the cooling medium in the first outlet pipe 520 flows downstream into the second inlet pipe 530.

[0047] like Figure 4 As shown, in order to facilitate the cooling medium in the first outlet pipe 520 to enter the oil cooler 300 through the second inlet pipe 530, a first liquid outlet joint 521 is provided. The first liquid outlet joint 521 extends from the first outlet pipe 520 as a starting point, and the extension direction of the first liquid outlet joint 521 forms an acute angle with the flow direction of the cooling medium in the first outlet pipe 520. After such a setting, when the cooling medium in the first outlet pipe 520 flows downstream toward the engine 100, a portion of the cooling medium can spontaneously enter the second inlet pipe 530 through the first liquid outlet joint 521 and further reach the oil cooler 300, thereby avoiding the situation where the cooling medium has difficulty entering the second inlet pipe 530 due to the hydraulic pressure of the cooling medium in the first outlet pipe 520.

[0048] In one embodiment, please refer to Figure 4 The pipeline assembly also includes a second outlet pipe 540, the two ends of which are respectively connected to the oil cooler 300 and the first outlet pipe 520, so that the cooling medium in the oil cooler 300 after heat exchange with the oil flows back to the first outlet pipe 520.

[0049] After exchanging heat with the engine oil, the cooling medium flows back to the first outlet pipe 520 through the second outlet pipe 540. Considering that the temperature of the cooling medium after exchanging heat with the engine oil will not significantly affect the temperature of the cooling medium in the first outlet pipe 520, the second outlet pipe 540 is directly connected to the first outlet pipe 520 to discharge the cooling medium after exchanging heat with the engine oil into the first outlet pipe 520 and further to the engine 100 for heat exchange. This arrangement also reduces the structural complexity of the cooling medium discharge piping on the oil cooler 300, eliminates the need for additional piping, and avoids other components, making the structure more compact.

[0050] Of course, in other embodiments, both ends of the second outlet pipe 540 may be connected to the oil cooler 300 and the first inlet pipe 510, so that the cooling medium in the oil cooler 300 after heat exchange with the oil flows into the first inlet pipe 510 and further dissipates heat through the radiator 200, which will not be repeated here.

[0051] In one embodiment, please refer to Figure 4 The first outlet pipe 520 is also provided with a first liquid inlet joint 522, and the second outlet pipe 540 is connected to the first outlet pipe 520 through the first liquid inlet joint 522. The extension direction of the first liquid inlet joint 522 is set at an obtuse angle to the flow direction of the cooling medium in the first outlet pipe 520, so that the cooling medium in the oil cooler 300 after heat exchange with the oil flows back to the first outlet pipe 520.

[0052] like Figure 4As shown, the cooling medium after heat exchange with the engine oil is discharged into the first outlet pipe 520 through the second outlet pipe 540. Since there is cooling medium flowing toward the engine 100 in the first outlet pipe 520, in order to prevent the hydraulic pressure of the cooling medium in the first outlet pipe 520 from hindering the cooling medium discharged from the second outlet pipe 540 into the first outlet pipe 520, a first liquid inlet joint 522 is provided. The first liquid inlet joint 522 extends from the first outlet pipe 520 and extends in a direction forming an obtuse angle with the flow direction of the cooling medium in the first outlet pipe 520. The second outlet pipe 540 is connected to the first outlet pipe 520 via the first liquid inlet joint 522, so that the cooling medium discharged from the second outlet pipe 540 can also be discharged along the flow of the cooling medium in the first outlet pipe 520, avoiding the situation where the cooling medium is difficult to discharge due to the conflict of flow directions.

[0053] In one embodiment, please refer to Figure 4 and Figure 5 The first liquid inlet joint 522 and the first liquid outlet joint 521 are spaced apart in the first outlet pipe 520 , and the first liquid inlet joint 522 is located upstream of the first liquid outlet joint 521 in the flow direction of the cooling medium in the first outlet pipe 520 .

[0054] like Figure 4 and Figure 5 As shown, the first liquid inlet connector 522 and the first liquid outlet connector 521 are spaced apart from each other on the first outlet pipe 520, and are arranged in this manner along the flow direction of the cooling medium in the first outlet pipe 520. This arrangement is intended to allow the second outlet pipe 540 connected to the first liquid inlet connector 522 to avoid other components, thereby achieving connection with the first outlet pipe 520.

[0055] Of course, in other embodiments, the first liquid inlet joint 522 and the first liquid outlet joint 521 are spaced apart in the first outlet pipe 520 , and the first liquid inlet joint 522 is located downstream of the first liquid outlet joint 521 in the flow direction of the cooling medium in the first outlet pipe 520 .

[0056] Combine Figure 6 As can be seen, by placing the first liquid inlet connector 522 downstream of the first liquid outlet connector 521, a portion of the upstream cooling medium passes through the first liquid outlet connector 521 into the second inlet pipe 530 and into the oil cooler 300 for heat exchange. The heated cooling medium, after heat exchange, then passes through the second outlet pipe 540 and through the first liquid inlet connector 522 into the first outlet pipe 520. In this way, the heated cooling medium discharged into the first outlet pipe 520 does not affect the temperature of the upstream cooling medium entering the second inlet pipe 530, thereby improving the heat exchange efficiency of the oil cooler 300.

[0057] In one embodiment, the first liquid inlet connector 522, the first liquid outlet connector 521 and the first outlet pipe 520 are integrally cast components. For example, the first liquid inlet connector 522, the first liquid outlet connector 521 and the first outlet pipe 520 can be integrally cast from materials such as cast iron.

[0058] In one embodiment, please refer to Figure 4 The first liquid inlet connector 522 is provided with a bending portion 5221 , which is provided at one end of the first liquid inlet connector 522 away from the first outlet pipe 520 , and the second outlet pipe 540 is connected to the first outlet pipe 520 through the bending portion 5221 .

[0059] Because the extension direction of the first liquid inlet connector 522 is opposite to the flow direction of the cooling medium in the first outlet pipe 520, considering the space occupied by the engine 100 assembly, directly connecting the second outlet pipe 540 to the first liquid inlet connector 522 would not only require the length of the second outlet pipe 540 to be increased, but also require multiple bends in the second outlet pipe 540, which is very inconvenient to arrange. The provision of the bend portion 5221 allows the second outlet pipe 540 to be connected to the first liquid inlet connector 522 without multiple bends.

[0060] Optionally, the bent portion 5221 is bent toward one side of the second outlet pipe 540 or one side of the cooler to facilitate connection between the second outlet pipe 540 and the first outlet pipe 520 .

[0061] In one embodiment, please refer to Figure 4 The first inlet pipe 510 is located on one side of the engine 100 , and the second inlet pipe 530 and the second outlet pipe 540 are both located on a side of the first inlet pipe 510 away from the engine 100 .

[0062] like Figure 4 As shown, a portion of the first inlet pipe 510 and a portion of the first outlet pipe 520 are arranged roughly in parallel, and the second inlet pipe 530 and the second outlet pipe 540 are both connected to the first outlet pipe 520, and the second inlet pipe 530 and the second outlet pipe 540 are both located on the outer side of the first inlet pipe 510, that is, the first inlet pipe 510 is located on the side of the second inlet pipe 530 and the second outlet pipe 540 facing the engine 100, thereby making the structure more compact and reducing the space occupied by the arrangement of the pipeline components.

[0063] In one embodiment, please refer to Figure 4 The oil cooler 300 is provided with a second liquid inlet connector 310 and a second liquid outlet connector 320. The second liquid inlet connector 310 and the second liquid outlet connector 320 are provided on the side of the oil cooler 300 facing the first outlet pipe 520. The second inlet pipe 530 is connected to the oil cooler 300 via the second liquid inlet connector 310, and the second outlet pipe 540 is connected to the oil cooler 300 via the second liquid outlet connector 320.

[0064] like Figure 4 As shown, the second liquid inlet connector 310 and the second liquid outlet connector 320 are adjacently arranged and disposed on a side of the oil cooler 300 facing the first outlet pipe 520 , so as to facilitate connection of the second outlet pipe 540 and the second inlet pipe 530 with the first outlet pipe 520 .

[0065] It can be understood that the extending direction of the second liquid inlet connector 310 and the extending direction of the second liquid outlet connector 320 may be parallel or non-parallel.

[0066] Optionally, a third heat exchange cavity and a fourth heat exchange cavity are provided within the oil cooler 300. The third and fourth heat exchange cavities are not interconnected and share a common cavity wall. The heated oil within the engine 100 flows through the third heat exchange cavity, through the oil cooler 300, and into the oil filter 400. The cooling medium within the second inlet pipe 530 passes through the oil cooler 300 and exchanges heat with the oil through the shared cavity wall. The heat-exchanged cooling medium is then discharged through the second outlet pipe 540 into the first outlet pipe 520, thereby forming a second cooling circulation system. This will not be further described.

[0067] In one embodiment, please refer to Figure 4 The second inlet pipe 530 is bendable, and the second inlet pipe 530 is bent toward a side away from the radiator 200. The second outlet pipe 540 is bendable, and the second outlet pipe 540 is bent toward a side away from the radiator 200.

[0068] The second inlet pipe 530 and the second outlet pipe 540 can be bent so as to be bent according to the space during assembly to facilitate specific connection arrangements.

[0069] Optionally, the second inlet pipe 530 and the second outlet pipe 540 may be plastic pipes or rubber pipes.

[0070] The present application also provides a motorcycle, comprising the engine 100 assembly as described in any of the above embodiments.

[0071] The motorcycle includes the aforementioned engine 100 assembly. A cooling medium forms a cycle through the engine 100, a first inlet pipe 510, a radiator 200, and a first outlet pipe 520. The cooling medium exchanges heat with the engine 100 to remove a portion of the heat from the engine 100. The heat-exchanged cooling medium then enters the radiator 200 through the first inlet pipe 510, dissipates the heat, and then re-enters the engine 100 through the first outlet pipe 520 for heat exchange. Another portion of the heat from the engine 100 is transferred to the engine oil. The oil is cooled by the oil cooler 300 and then filtered by the oil filter 400. The oil in the oil cooler 300 exchanges heat with the cooling medium entering through the second inlet pipe 530 to achieve cooling of the oil. Because the cooling medium of the oil cooler 300 is directly drawn from the first outlet pipe 520, there is no need to introduce a new cooling source pipeline, reducing structural complexity. Furthermore, interference with other components or pipelines caused by the newly added cooling source pipeline is avoided, and space occupation is also reduced.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0077] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An engine assembly, characterized in that: The oil cooler comprises an engine, a radiator, an oil cooler, an oil filter and a pipeline assembly, wherein the oil cooler is connected in series between the engine and the oil filter and is used to cool the oil entering the oil filter from the engine; The pipe assembly includes a first inlet pipe and a first outlet pipe, wherein both ends of the first inlet pipe are respectively connected to the engine and the radiator so that the cooling medium after heat exchange with the engine flows back to the radiator, and the both ends of the first outlet pipe are respectively connected to the radiator and the engine so that the cooling medium after heat dissipation through the radiator returns to the engine and exchanges heat with the engine; The pipeline assembly further includes a second inlet pipe, both ends of which are connected to the first outlet pipe and the oil cooler, respectively, so that a portion of the cooling medium in the first outlet pipe enters the oil cooler through the second inlet pipe and exchanges heat with the oil in the oil cooler; The first outlet pipe is provided with a first liquid outlet joint, and the second inlet pipe is connected to the first outlet pipe through the first liquid outlet joint. The extension direction of the first liquid outlet joint is arranged at an acute angle to the flow direction of the cooling medium in the first outlet pipe, so that a portion of the cooling medium in the first outlet pipe flows downstream into the second inlet pipe. The pipeline assembly further includes a second outlet pipe, both ends of which are connected to the oil cooler and the first outlet pipe respectively, so that the cooling medium in the oil cooler, after exchanging heat with the oil, flows back to the first outlet pipe; The first outlet pipe is further provided with a first liquid inlet joint, and the second outlet pipe is connected to the first outlet pipe through the first liquid inlet joint. The extension direction of the first liquid inlet joint is arranged at an obtuse angle to the flow direction of the cooling medium in the first outlet pipe, so that the cooling medium in the oil cooler, after heat exchange with the oil, flows back to the first outlet pipe downstream.

2. The engine assembly according to claim 1, characterized in that: The engine is provided with a first heat exchange cavity, the radiator is provided with a second heat exchange cavity, the two ends of the first inlet pipe are respectively connected to one end of the first heat exchange cavity and one end of the second heat exchange cavity, and the two ends of the first outlet pipe are respectively connected to the other end of the first heat exchange cavity and the other end of the second heat exchange cavity.

3. The engine assembly according to claim 1, characterized in that: The second inlet pipe and the second outlet pipe are plastic pipes or rubber pipes.

4. The engine assembly according to claim 1, characterized in that: The first liquid inlet joint and the first liquid outlet joint are spaced apart from each other in the first outlet pipe, and the first liquid inlet joint is located upstream of the first liquid outlet joint in the flow direction of the cooling medium in the first outlet pipe; or The first liquid inlet joint and the first liquid outlet joint are spaced apart from each other in the first outlet pipe, and the first liquid inlet joint is located downstream of the first liquid outlet joint in the flow direction of the cooling medium in the first outlet pipe.

5. The engine assembly according to claim 1, characterized in that: The first liquid inlet connector is provided with a bending portion, which is provided at an end of the first liquid inlet connector away from the first outlet pipe, and the second outlet pipe is connected to the first outlet pipe through the bending portion.

6. The engine assembly according to claim 5, characterized in that: The bent portion is bent toward one side of the second outlet pipe or one side of the cooler.

7. The engine assembly according to claim 1, characterized in that: The first inlet pipe is located at one side of the engine, and the second inlet pipe and the second outlet pipe are both located at a side of the first inlet pipe away from the engine.

8. The engine assembly according to any one of claims 1 to 7, characterized in that: The oil cooler is provided with a second liquid inlet joint and a second liquid outlet joint, and the second liquid inlet joint and the second liquid outlet joint are arranged on the side of the oil cooler facing the first outlet pipe; the second inlet pipe is connected to the oil cooler through the second liquid inlet joint, and the second outlet pipe is connected to the oil cooler through the second liquid outlet joint.

9. The engine assembly according to any one of claims 1 to 7, characterized in that: The second inlet pipe is bendable, and the second inlet pipe is bent toward a side away from the radiator; or / and the second outlet pipe is bendable, and the second outlet pipe is bent toward a side away from the radiator.

10. A motorcycle, characterized in that: Comprising the engine assembly according to any one of claims 1 to 9.

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