Urea nozzle cooling system, engine assembly, and vehicle

Abstract

The application provides a urea nozzle cooling system, an engine assembly and a vehicle, and belongs to the technical field of engines, and comprises a water pump and a urea nozzle assembly; the water pump is connected to the outer wall of an engine, a liquid taking pipe and a pumping pipe are connected to the water pump, and the liquid taking pipe is connected to the bypass outlet of the cooling liquid of the engine; the urea nozzle assembly is connected to the exhaust manifold of the engine and connected to the pumping pipe, a liquid returning pipe is connected to the urea nozzle assembly, and the liquid returning pipe is connected to the bypass inlet of the cooling liquid beside the bypass outlet of the cooling liquid. The urea nozzle cooling system provided by the application connects the liquid taking pipe and the liquid returning pipe to the pumping pipe through integrated supports to form an integrated pipeline, and arranges the bypass outlet of the cooling liquid and the bypass inlet of the cooling liquid close to each other, so that the length of the pipeline can be shortened, the integrated pipeline can be connected to the engine with the help of at least one integrated support, the difficulty of disassembly and maintenance can be reduced, and the integration and light weight of the overall structure of the engine are promoted.

Description

Technical Field

[0001] This application belongs to the field of engine technology, and more specifically, relates to a urea nozzle cooling system, an engine assembly, and a vehicle. Background Technology

[0002] Urea injectors are typically installed on the exhaust manifold to meet the emission standards of diesel engines. Their function is to inject a metered amount of urea solution as part of the exhaust aftertreatment, thereby reducing nitrogen oxide emissions. Since the exhaust manifold is constantly exposed to high temperatures, a suitable cooling system is required for the urea injectors.

[0003] A common urea nozzle cooling system draws coolant from the engine and pumps it to the urea nozzle assembly using a water pump. The coolant then flows back to the engine after passing through the urea nozzle, forming a circulation. This process cools the urea nozzle and prevents the urea solution from crystallizing and clogging the nozzle at high temperatures.

[0004] In the existing technology, considering that the coolant needs to enter the radiator located at the front of the engine compartment for cooling, and that the urea nozzle is installed in the exhaust manifold located at the rear of the engine, each pipeline needs to be arranged around the engine from front to back. This results in long pipelines with many irregular bends. To ensure the stability of the pipeline connection, multiple brackets need to be installed on each pipeline to connect with the engine. This makes the pipeline itself and its connection structure too complex, which not only makes disassembly and maintenance difficult, but also does not meet the design requirements of integrated and lightweight engine structure. Utility Model Content

[0005] The purpose of this application is to provide a urea nozzle cooling system, an engine assembly, and a vehicle, which aims to simplify the piping structure of the urea nozzle cooling system and improve the convenience of disassembly and maintenance.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: Firstly, embodiments of this application provide a urea nozzle cooling system, comprising: A water pump is connected to the outer wall of the engine. The water pump is connected to a liquid intake pipe and a pumping pipe. The liquid intake pipe is connected to the coolant bypass outlet of the engine. A urea nozzle assembly is connected to the exhaust manifold of the engine and to the pumping pipe. A return pipe is connected to the urea nozzle assembly and is connected to the coolant bypass inlet of the engine. The liquid intake pipe and the liquid return pipe are respectively connected to the pumping pipe through at least one integrated bracket to form an integrated pipeline. The integrated pipeline is detachably connected to the outer wall of the engine through a mounting bracket and / or at least one of the integrated brackets.

[0007] Specifically, the integrated piping can be connected to the outer wall of the engine via a mounting bracket, or via at least one integrated bracket, or via a mounting bracket in conjunction with at least one integrated bracket. Considering the reliability of the integrated piping connection, the method of connecting via a mounting bracket in conjunction with at least one integrated bracket is preferred.

[0008] Compared with the prior art, the solution shown in this application embodiment connects the water pump to the engine's coolant bypass outlet via a liquid intake pipe. This allows the pump to extract low-temperature coolant from the engine's cooling water jacket. The low-temperature coolant is then delivered to the urea nozzle assembly via a pumping pipe. After cooling the urea nozzle, the temperature of the coolant rises and returns to the engine's cooling bypass inlet via a return pipe, thus forming a circulating cooling circuit. This allows for continuous cooling of the urea nozzle with the help of the engine coolant, preventing crystallization and blockage of the urea nozzle due to high temperature.

[0009] Both the liquid intake pipe and the liquid return pipe are connected to the pumping pipe through an integrated bracket to form an integrated pipeline. Compared with the existing technology where each pipeline is independently connected to the engine, this not only enables the overall integrated disassembly and assembly of each pipeline, but also reduces the number of connection points with the engine, thereby improving the convenience of assembly and maintenance.

[0010] The integrated piping can be connected and fixed to the engine with at least one integrated bracket, which can not only reduce or even eliminate the mounting bracket, but also simplify the integrated piping structure itself and its connection structure, thereby improving the convenience of disassembly and maintenance while promoting the achievement of lightweight indicators.

[0011] In conjunction with the first aspect, in one possible implementation, the coolant bypass inlet and the coolant bypass outlet are arranged adjacent to each other, and both are located between the water pump and the urea nozzle assembly.

[0012] In the above technical solution, compared to the traditional pipeline structure where the coolant bypass inlet and outlet are located closer to the radiator at the front of the engine compartment, the coolant bypass inlet and outlet are both located between the water pump and urea nozzle assembly. Because the two are close to each other, the total length of each pipeline is close to twice the distance between the water pump and urea nozzle assembly. Compared to the traditional pipeline structure where the urea nozzle assembly return pipeline needs to be extended around the engine to the front of the engine, which is much longer than twice the distance mentioned above, the pipeline length can be shortened to the greatest extent. This not only simplifies the pipeline structure, but also helps to improve the overall structural compactness and lightweight performance.

[0013] In some embodiments, the urea nozzle cooling system further includes a first channel and a second channel integrated into the engine; wherein, one end of the first channel forms the coolant bypass outlet, and the other end is connected to the engine's cooling water jacket, with the connection position close to the main inlet of the cooling water jacket; one end of the second channel forms the coolant bypass inlet, and the other end is connected to the cooling water jacket, with the connection position close to the main outlet of the cooling water jacket.

[0014] In the above technical solution, considering that the coolant should flow in the engine with a low-temperature inlet at the main inlet and a high-temperature outlet at the main outlet, and to ensure that the coolant flow path inside the engine covers all parts, the main inlet and main outlet usually need to be far apart. Due to the positional limitations of the main inlet and main outlet, the coolant bypass outlet and coolant bypass inlet are connected to the water jacket via the engine's built-in first and second channels, respectively. This allows the coolant bypass outlet and coolant bypass inlet to be positioned close to each other, thereby shortening the overall length of the integrated piping. This not only simplifies the piping structure and improves the convenience of disassembly and maintenance, but also helps to improve the overall compactness and lightweight performance of the engine.

[0015] For example, the liquid intake pipe, the pumping pipe, and the return pipe are all formed by connecting at least one flexible pipe and at least one rigid pipe; wherein, the mounting bracket and each of the integrated brackets are fixedly connected to the rigid pipe.

[0016] In the above technical solution, due to the irregular shape of the engine's outer wall, and the need for the integrated pipelines to extend along the shape of the engine's outer wall to save space, each pipeline requires multiple bends. Considering that continuous bending of rigid pipes not only increases the risk of pipeline damage but also increases processing difficulty and cost, the liquid intake pipe, pumping pipe, and return pipe all use a combination of flexible and rigid pipes. Using flexible pipes not only facilitates connection but also reduces bending of rigid pipes. At the same time, flexible pipes are relatively lightweight, thus contributing to weight reduction.

[0017] For example, the mounting bracket and each of the integrated brackets have a limiting groove suitable for embedding the rigid tube, and the groove wall of the limiting groove is fixedly connected to the tube wall of the rigid tube.

[0018] In the above technical solution, the limiting groove can be a bend of 90 degrees or greater, or a concave groove of bend. By setting a limiting groove that matches the diameter of the rigid tube for the rigid tube to be embedded and fixed, the connection reliability of the rigid tube can be improved.

[0019] Specifically, the fixed connection between the rigid tube and the limiting groove can be achieved by applying adhesive between their contact surfaces, or by welding the rigid tube after it is embedded in the limiting groove.

[0020] In one possible implementation, the mounting bracket and each of the integrated brackets are provided with an extension lug, which is bent in a direction away from the engine and is used to fix peripheral pipes and / or wiring harnesses.

[0021] In the above technical solution, by setting an extended ear plate, the mounting bracket and integrated bracket can gain additional functions, and the wiring harness or pipeline around the engine can be fixed with the help of the extended ear plate. This can eliminate the need for brackets for the surrounding pipelines and wiring harnesses, which not only helps to improve the compactness and integration of the overall engine structure, but also helps to promote the overall lightweighting of the structure.

[0022] For example, the liquid intake pipe is connected to the pumping pipe via a first integrated bracket, the liquid return pipe is connected to the pumping pipe via a second integrated bracket, and the mounting bracket is connected to the pumping pipe; wherein, the mounting bracket and the second integrated bracket are connected to the outer wall of the engine, and are respectively located on both sides of the first integrated bracket.

[0023] In the above technical solution, since the water pump is located at the front of the engine, and the front of the engine is more complex in shape than the rear, the liquid intake pipe is connected to the pumping pipe using an independent first integrated bracket. At the same time, the mounting bracket connected to the pumping pipe is used to connect to the engine. This simplifies the structure of the mounting bracket, reduces its installation space requirements, and facilitates a reliable connection between the mounting bracket and the complex outer wall of the front of the engine. The return pipe extends forward from the rear of the engine, and the outer wall surface of the engine in this area is relatively regular. Therefore, the second integrated bracket has sufficient installation space. In this case, the second integrated bracket not only connects the return pipe and the pumping pipe, but also serves to connect the engine. This eliminates the need to arrange a mounting bracket at the rear of the engine, thereby improving the structural compactness of the integrated pipeline and contributing to the achievement of lightweight targets.

[0024] For example, the mounting bracket is provided with at least one first connection point and at least one anti-turn plate; the first connection point is detachably connected to the connection hole on the outer wall of the engine, and the anti-turn plate is pressed against the step or groove on the outer wall of the engine; the second integrated bracket is provided with at least two second connection points at intervals, and each second connection point is detachably connected to the connection hole on the outer wall of the engine.

[0025] In the above technical solution, the mounting bracket is connected to the engine in the front half of the engine. This location has a relatively complex structure and limited space. Therefore, the mounting bracket achieves a reliable connection to the engine's outer wall using a first connection point and an anti-rotation plate, which not only facilitates disassembly and assembly but also occupies little space. The second integrated bracket is located in the rear half of the engine, with ample installation and operation space. Therefore, it uses at least two second connection points to connect to the engine's outer wall, eliminating the need for a corresponding anti-rotation structure tailored to the engine's outer wall shape. This simplifies the structure of the second integrated bracket and reduces its manufacturing difficulty.

[0026] In some embodiments, the water pump is connected to a pump frame, which is detachably connected to the outer wall of the engine via at least two third connection points.

[0027] In the above technical solution, the water pump is connected to the outer wall of the engine through a pump frame. The at least two third connection points set on the pump frame can ensure the connection reliability of the water pump. The structure is simple and easy to disassemble and maintain.

[0028] Secondly, embodiments of this application also provide an engine assembly including the aforementioned urea nozzle cooling system.

[0029] The solution shown in this application, compared with the prior art, adopts the aforementioned urea nozzle cooling system. Both the liquid intake pipe and the liquid return pipe are connected to the pump pipe via an integrated bracket to form an integrated pipeline. Compared to the prior art where each pipeline is independently connected to the engine, this not only enables the overall integrated assembly and disassembly of each pipeline but also reduces the number of connection points with the engine, thereby improving assembly and maintenance convenience. The integrated pipeline can be connected and fixed to the engine using at least one integrated bracket, which not only reduces or even eliminates mounting brackets but also simplifies the integrated pipeline structure itself and its connection structure, thus improving assembly and maintenance convenience while promoting the achievement of lightweight specifications.

[0030] Thirdly, embodiments of this application also provide a vehicle including the aforementioned engine assembly.

[0031] The solution shown in this application embodiment, compared with the prior art, adopts an engine assembly with the aforementioned urea nozzle cooling system. The liquid intake pipe and the liquid return pipe are both connected to the pumping pipe through an integrated bracket to form an integrated pipeline. This not only enables the overall integrated disassembly and assembly of each pipeline, but also reduces the number of connection points with the engine, improving the convenience of assembly and maintenance. The integrated pipeline can be connected and fixed to the engine by at least one integrated bracket, which not only reduces or even eliminates the need for mounting brackets, but also simplifies the integrated pipeline structure itself and its connection structure, thereby improving the convenience of disassembly and maintenance while promoting the achievement of lightweight indicators. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the urea nozzle cooling system provided in the embodiments of this application; Figure 2 This is a three-dimensional structural diagram of the first integrated bracket used in the embodiments of this application; Figure 3 This is a three-dimensional structural diagram of the second integrated bracket used in the embodiments of this application; Figure 4 This is a three-dimensional structural diagram of the mounting bracket used in the embodiments of this application; Figure 5 This is a schematic diagram of the connection structure of the mounting bracket on the engine side wall used in the embodiments of this application.

[0034] In the diagram: 10. Water pump; 11. Pump frame; 111. Third connection point; 20. Integrated piping; 201. Flexible pipe; 202. Rigid pipe; 21. Liquid intake pipe; 22. Pumping pipe; 23. Liquid return pipe; 24. Integrated bracket; 241. First integrated bracket; 242. Second integrated bracket; 2421. Second connection point; 25. Mounting bracket; 251. Limiting groove; 252. Outer ear plate; 253. First connection point; 254. Anti-turning plate; 30. Urea nozzle assembly; 40. Engine; 41. Coolant bypass outlet; 42. Coolant bypass inlet; 43. First channel; 44. Second channel; 45. Main inlet; 46. Main outlet; 47. Outer wall step. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0036] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0037] In the embodiments of this application, the directions or positional relationships indicated by "front" and "rear" are based on the vehicle's own orientation, where the front of the vehicle represents "front" and the rear of the vehicle represents "rear".

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a few" means two or more, unless otherwise explicitly specified.

[0039] It needs to be explained that, as existing technology, the engine's coolant circulation loop involves coolant entering the engine through the main inlet of the engine cooling circuit, exchanging heat with high-temperature components, exiting through the main outlet, and entering the radiator for cooling. After cooling, it re-enters the engine, forming a circulation. The engine cooling circuit has bypass inlets and outlets, the purpose of which is to allow coolant to be drawn from the engine cooling circuit to cool components outside the engine block, such as the urea injector system.

[0040] Typically, the radiator is located at the front of the engine compartment, which is more conducive to the radiator contacting the outside airflow for heat dissipation. The engine cooling circuit includes at least the cooling water jacket surrounding the piston cylinder and the cylinder head cooling water passage. The urea nozzle system is located at the engine's exhaust manifold. The coolant enters the cooling water jacket and cylinder head cooling water passage from the radiator, carries away heat, and then returns to the radiator. Considering the relative position of the radiator and the engine, the main outlet of the engine's cooling circuit is usually located at the frontmost position, so that the coolant, after its temperature rises, can enter the radiator for heat dissipation through the shortest path. The main inlet needs to be located at a position far away from the main outlet and the radiator. Commonly, the main inlet is located on the side wall of the rear half of the engine block, thus ensuring that the cooling circuit can completely cover each cylinder and cylinder head.

[0041] Based on the above-mentioned arrangement of the engine cooling circuit, the return water of the urea nozzle cooling system needs to extend from the rear to the front of the engine. Moreover, considering that the pipeline layout needs to follow the shape of the engine's outer wall, there will inevitably be many bends, making the structure very complex. In addition, each pipeline of the urea nozzle cooling system needs at least two connection points to be connected with the engine's outer wall. The long pipeline, complex structure, and many connection points are all factors that restrict the integration and lightweighting of the engine's overall structure.

[0042] Please refer to the following: Figures 1 to 5 The urea nozzle cooling system provided in this application is described below. The urea nozzle cooling system includes a water pump 10 and a urea nozzle assembly 30. The water pump 10 is connected to the outer wall of the engine 40, and a liquid intake pipe 21 and a pumping pipe 22 are connected to the water pump 10. The liquid intake pipe 21 is connected to the coolant bypass outlet 41 of the engine 40. The urea nozzle assembly 30 is connected to the exhaust manifold of the engine 40 and is connected to the pumping pipe 22. A return pipe 23 is connected to the urea nozzle assembly 30 and is connected to the coolant bypass inlet 42 of the engine 40. The liquid intake pipe 21 and the return pipe 23 are respectively connected to the pumping pipe 22 via at least one integrated bracket 24 to form an integrated pipeline 20. The integrated pipeline 20 is detachably connected to the outer wall of the engine 40 via a mounting bracket 25 and / or at least one integrated bracket 24.

[0043] It should be explained that in this embodiment, the liquid intake pipe 21 and the liquid return pipe 23 can be fixed to the pumping pipe 22 by one or more integrated brackets 24 based on their respective distances from the coolant bypass outlet 41 and the coolant bypass inlet 42. Under normal circumstances, it is sufficient to meet the reliability requirements by connecting each of them to the pumping pipe 22 through one integrated bracket 24. However, for special models with long distances, the number of integrated brackets 24 can be increased.

[0044] Specifically, the integrated pipeline 20 can be detachably connected to the outer wall of the engine 40 through one or more mounting brackets 25; it can also be detachably connected to the outer wall of the engine 40 through one mounting bracket 25 in conjunction with one or more integrated brackets 24; or it can be detachably connected to the outer wall of the engine entirely by means of at least two integrated brackets 24 without using mounting brackets.

[0045] The specific way to detachably connect the aforementioned mounting bracket 25 and integrated bracket 24 to the outer wall of the engine 40 is that fasteners pass through the mounting bracket 25 and integrated bracket 24 and are screwed into the pre-set threaded holes on the outer wall of the engine; or it can be a detachable connection method using snap-fit ​​fixing, for example, the mounting bracket 25 and integrated bracket 24 are provided with buckles, and the outer wall surface of the engine 40 is provided with slots, and the connection is achieved by snapping the buckles into the slots.

[0046] Compared with the prior art, the urea nozzle cooling system provided in this application has a water pump 10 connected to the coolant bypass outlet 41 of the engine 40 through the liquid intake pipe 21. It can pump out low-temperature coolant from the cooling water jacket of the engine 40, and then send the low-temperature coolant into the urea nozzle assembly 30 through the pumping pipe 22. After the low-temperature coolant cools the urea nozzle, the temperature rises and it returns to the cooling bypass inlet of the engine 40 through the return pipe 23, thus forming a circulating cooling circuit. It can achieve continuous cooling of the urea nozzle with the help of the engine 40 coolant, and avoid crystallization and blockage of the urea nozzle at high temperature.

[0047] Both the liquid intake pipe 21 and the liquid return pipe 23 are connected to the pumping pipe 22 through the integrated bracket 24 to form an integrated pipeline 20. Compared with the existing technology where each pipeline is independently connected to the engine 40, the integration is higher. It can not only realize the overall integrated disassembly and assembly of each pipeline, but also reduce the connection points between the pipeline and the engine 40, thereby improving the convenience of assembly and maintenance.

[0048] The integrated pipeline 20 can be connected and fixed to the engine 40 by means of at least one integrated bracket 24. This not only reduces or even eliminates the need for mounting brackets, but also simplifies the structure of the integrated pipeline 20 itself and its connection structure, thereby improving the convenience of disassembly and maintenance while promoting the achievement of lightweight indicators.

[0049] For some possible implementations, please refer to [link / reference]. Figure 1 The coolant bypass inlet 42 and the coolant bypass outlet 41 are arranged adjacent to each other, and are located between the water pump 10 and the urea nozzle assembly 30.

[0050] Compared to the existing technology where coolant flows back to the radiator located closer to the front of the engine compartment, the coolant bypass inlet 42 and coolant bypass outlet 41 are both located on the engine 40 between the water pump 10 and the urea nozzle assembly 30. This brings the two closer together, allowing the total length of each pipe to be close to twice the distance between the water pump 10 and the urea nozzle assembly 30 (the pumping pipe 22 connects the water pump 10 and the urea nozzle assembly 30, the take-up pipe 21 extends forward from the coolant bypass outlet 41 to connect to the water pump 10, and the return pipe 23 extends backward from the coolant bypass inlet 42 to connect to the urea nozzle assembly 30). Compared to the traditional pipe structure that requires the entire pipe returning from the urea nozzle assembly 30 to bypass the engine 40 and extend to the front of the engine 40, this method can shorten the pipe length to the greatest extent. This not only simplifies the pipe structure but also helps to improve the overall structural compactness and lightweight performance.

[0051] In some embodiments, such as Figure 1As shown, the urea nozzle cooling system also includes a first channel 43 and a second channel 44 integrated into the engine 40; wherein, one end of the first channel 43 forms a coolant bypass outlet 41, and the other end is connected to the cooling water jacket of the engine 40, and the connection position is close to the main inlet 45 of the cooling water jacket; one end of the second channel 44 forms a coolant bypass inlet 42, and the other end is connected to the cooling water jacket, and the connection position is close to the main outlet 46 of the cooling water jacket.

[0052] It should be emphasized here that Figure 1 The purpose is to illustrate how to achieve the adjacent arrangement of coolant bypass outlet 41 and coolant bypass inlet 42 on the engine side wall. The actual positions of the engine's main inlet 45 and main outlet 46 of the cooling circuit can be different from those shown in the figure. The positions of the main inlet 45 and main outlet 46 given in the figure should not be taken as the only feasible method. They can also be set in other positions on the engine based on actual needs. When the positions are different, it is only necessary to design corresponding extension paths for the first channel 43 and the second channel 44.

[0053] Considering that the coolant should flow within the engine 40 via a low-temperature inlet 45 and a high-temperature outlet 46, and to ensure that the coolant flow path within the engine 40 covers all parts, the main inlet 45 and the main outlet 46 typically need to be spaced far apart. Specifically, the main inlet 45 is usually located on the middle-rear side wall of the engine 40, while the main outlet 46 is located at the front of the engine 40 to facilitate coolant entry into the radiator.

[0054] The coolant temperature is lower near the main inlet 45 and rises as it approaches the main outlet 46. To improve the cooling effect of the coolant on the urea nozzle system, the coolant intake pipe 21 should lead the coolant out from near the main inlet 45, while the coolant flowing through the urea nozzle system should return to the engine 40 from near the main outlet 46.

[0055] Based on the above, in order to avoid the structural limitations of the integrated pipeline 20 imposed by the positions of the main inlet 45 and the main outlet 46, the first channel 43 and the second channel 44 built into the engine 40 (which can be understood as channels formed in the inner wall of the cylinder of the engine 40) are used to connect the coolant bypass outlet 41 and the coolant bypass inlet 42 to the water jacket, respectively. This allows the coolant bypass outlet 41 and the coolant bypass inlet 42 to be set up close to each other, so that the return pipe 23 no longer needs to be extended around the entire engine 40 to the front end of the engine 40, thereby shortening the overall length of the integrated pipeline 20. This not only simplifies the pipeline structure and improves the convenience of disassembly and maintenance, but also helps to improve the overall structural compactness and lightweight performance of the engine 40.

[0056] Specifically, please refer to Figure 1 In this embodiment, the liquid intake pipe 21, the pumping pipe 22, and the return pipe 23 are all formed by connecting at least one flexible pipe 201 and at least one rigid pipe 202; wherein, the mounting bracket 25 and each integrated bracket 24 are fixedly connected to the rigid pipe 202.

[0057] Specifically, the flexible tube 201 can be a rubber hose, and the rigid tube 202 can be a metal tube. The connection between the flexible tube 201 and the rigid tube 202 can be achieved by fitting the end of the flexible tube 201 onto the end of the rigid tube 202 and then clamping them together with a clamp.

[0058] To facilitate connection, both ends of the liquid intake pipe 21 are made of flexible pipe 201. This allows the flexible pipe 201 to clamp the coolant bypass outlet 41 (with a pipe joint) and the water pump 10 inlet joint, improving connection convenience. Similarly, both ends of the pumping pipe 22 and the return pipe 23 are also preferably made of flexible pipe 201, thus ensuring the ease of assembly and disassembly of each pipe connection.

[0059] Because the outer wall of the engine 40 has an irregular shape, and the integrated pipeline 20 needs to extend along the outer wall of the engine to save space, each pipeline needs to have multiple bends. Considering that continuous bending of the rigid pipe 202 not only increases the risk of pipeline damage, but also makes processing difficult and costly, the liquid intake pipe 21, pumping pipe 22, and return pipe 23 all use a combination of flexible pipe 201 and rigid pipe 202. Using flexible pipe 201 not only facilitates connection, but also reduces bending of rigid pipe 202. At the same time, flexible pipe 201 is relatively lightweight, which helps to promote weight reduction.

[0060] In some embodiments, to ensure connection strength, please refer to [link / reference needed]. Figures 2 to 4 The aforementioned mounting bracket 25 and each integrated bracket 24 have a limiting groove 251 suitable for embedding the rigid tube 202, and the groove wall of the limiting groove 251 is fixedly connected to the tube wall of the rigid tube 202.

[0061] The limiting groove 251 can be a bend of 90 degrees or greater, or a curved recessed groove. The fixed connection between the rigid tube 202 and the limiting groove 251 can be achieved by applying adhesive between their contact surfaces, or by welding after the rigid tube 202 is embedded in the limiting groove 251. In this embodiment, by providing a limiting groove 251 that matches the diameter of the rigid tube 202 for the rigid tube 202 to be embedded and fixed, the connection reliability of the rigid tube 202 can be improved.

[0062] For some possible implementations, please refer to [link / reference]. Figures 2 to 4The mounting bracket 25 and each integrated bracket 24 are provided with an extension ear plate 252. The extension ear plate 252 is bent in the direction away from the engine 40 and is used to fix the surrounding pipes and / or wiring harnesses.

[0063] By setting the extended ear plate 252, the mounting bracket 25 and the integrated bracket 24 can gain additional functions, so that the wiring harness or pipeline around the engine 40 can be fixed with the help of the extended ear plate 252. This eliminates the need for brackets for the surrounding pipelines and wiring harnesses, which not only helps to improve the compactness and integration of the overall structure of the engine 40, but also helps to promote the overall structure to be lightweight.

[0064] Specifically, in combination Figures 1 to 5 It is understood that the liquid intake pipe 21 is connected to the pumping pipe 22 through the first integrated bracket 241, the liquid return pipe 23 is connected to the pumping pipe 22 through the second integrated bracket 242, and the mounting bracket 25 is connected to the pumping pipe 22; wherein, the mounting bracket 25 and the second integrated bracket 242 are connected to the outer wall of the engine 40, and the two are respectively located on both sides of the first integrated bracket 241.

[0065] Since the water pump 10 is located at the front of the engine 40, and the front of the engine 40 is more complex in shape than the rear, the liquid intake pipe 21 is connected to the pumping pipe 22 by an independent first integrated bracket 241. At the same time, the mounting bracket 25 connected to the pumping pipe 22 is used to connect to the engine 40. This simplifies the structure of the mounting bracket 25, reduces its installation space requirements, and facilitates a reliable connection between the mounting bracket and the complex outer wall of the front of the engine 40.

[0066] The return pipe 23 extends forward from the rear of the engine 40. The middle and rear parts of the engine 40 are relatively regular, so the second integrated bracket 242 has sufficient installation space. In this case, the second integrated bracket 242 not only connects the return pipe 23 and the pump pipe 22, but also connects the engine 40. This eliminates the need to install a bracket 25 at the rear of the engine 40, thereby improving the structural compactness of the integrated pipeline 20 and helping to achieve the weight reduction target.

[0067] It should be noted that you should refer to [link / reference]. Figure 4 and Figure 5 The mounting bracket 25 is provided with at least one first connection point 253 and at least one anti-turn plate 254; the first connection point 253 is detachably connected to the connection hole on the outer wall of the engine 40, and the anti-turn plate 254 is pressed against the step 47 or groove on the outer wall of the engine 40; the second integrated bracket 242 is provided with at least two second connection points 2421 at intervals, and each second connection point 2421 is detachably connected to the connection hole on the outer wall of the engine 40.

[0068] The first connection point 253 and the second connection point 2421 mentioned above can both be fasteners such as bolts that are inserted at the corresponding positions; threaded holes are provided on the outer wall of the engine 40 to achieve detachable connection with the fasteners.

[0069] Since the connection between the mounting bracket 25 and the engine 40 is located in the front half of the engine 40, the structure of which is relatively complex and the space is small, the mounting bracket 25 achieves a reliable connection with the outer wall of the engine by means of a first connection point 253 and a stop plate 254, which not only facilitates disassembly and assembly operations, but also occupies little space.

[0070] The second integrated bracket 242 is located in the rear half of the engine 40 and has ample space for installation and operation. Therefore, it uses at least two second connection points 2421 to connect with the outer wall of the engine. There is no need to set a corresponding anti-rotation structure for the outer wall shape of the engine 40, which simplifies the structure of the second integrated bracket 242 and reduces the processing and manufacturing difficulty of the second integrated bracket 242.

[0071] It should be noted that in the embodiments of this application, the water pump 10 can be the same as the radiator cooling fan and draw power from the crankshaft of the engine 40, or it can be an electronic water pump. Considering that the exhaust manifold is still at a high temperature for a period of time after the engine 40 is stopped, if the power is drawn from the engine crankshaft, the water pump 10 will stop synchronously with the engine 40. This would cause the coolant to be unable to flow to the urea nozzle cooling system after the engine stops, thus causing the urea nozzle to crystallize and become blocked at high temperature. In order to avoid this problem, an electronic water pump can be preferred. After the engine 40 stops, the water pump 10 can continue to be powered by the vehicle power supply system to ensure the normal flow of coolant.

[0072] It needs to be explained that, see Figure 1 In this embodiment, a pump frame 11 is connected to the water pump 10. The pump frame 11 is detachably connected to the outer wall of the engine 40 through at least two third connection points 111. In the prior art, the pump frame 11 needs to also serve to fix the pipeline, so the structure is complex and occupies a lot of space. Here, due to the adoption of the integrated pipeline 20 concept, the pump frame 11 no longer needs to take into account the pipeline connection. Only the design for fixing the water pump 10 itself needs to be simplified. This not only helps to improve the compactness of the overall structure, but also helps to reduce the weight of the overall structure.

[0073] The third connection point 111 can also be a fastener such as a bolt that passes through the corresponding position of the pump frame 11. The detachable connection with the engine 40 is that the fastener passes through the pump frame 11 and is screwed into the threaded hole on the outer wall of the engine. The connection method is simple and easy to disassemble and assemble.

[0074] Based on the same inventive concept, combined with Figures 1 to 5It is understood that embodiments of this application also provide an engine assembly including the aforementioned urea nozzle cooling system.

[0075] The engine assembly provided in this embodiment adopts the aforementioned urea nozzle cooling system. Both the liquid intake pipe 21 and the liquid return pipe 23 are connected to the pumping pipe 22 via an integrated bracket 24 to form an integrated pipeline 20. Compared to the prior art where each pipeline is independently connected to the engine 40, this not only allows for the integrated disassembly and assembly of all pipelines but also reduces the number of connection points with the engine 40, thereby improving assembly and maintenance convenience. The integrated pipeline 20 can be connected and fixed to the engine 40 using at least one integrated bracket 24. This not only reduces or even eliminates the need for mounting brackets but also simplifies the structure of the integrated pipeline 20 itself and its connection structures, thereby improving disassembly and maintenance convenience while promoting the achievement of lightweight specifications.

[0076] Based on the same inventive concept, this application also provides a vehicle that uses an engine assembly with the above-described urea nozzle cooling system.

[0077] Compared with the prior art, the vehicle provided in this embodiment has an integrated pipeline 20 formed by connecting the liquid intake pipe 21 and the liquid return pipe 23 of the urea nozzle cooling system to the pumping pipe 22 through an integrated bracket 24. This not only enables the overall integrated disassembly and assembly of each pipeline, but also reduces the number of connection points with the engine 40, improving the convenience of assembly and maintenance. The integrated pipeline 20 can be connected and fixed to the engine 40 by means of at least one integrated bracket 24, which not only reduces or even eliminates the mounting bracket, but also simplifies the structure of the integrated pipeline 20 itself and its connection structure, thereby improving the convenience of disassembly and maintenance while promoting the achievement of lightweight indicators.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A urea nozzle cooling system characterized by, include: A water pump is connected to the outer wall of the engine. The water pump is connected to a liquid intake pipe and a pumping pipe. The liquid intake pipe is connected to the coolant bypass outlet of the engine. A urea nozzle assembly is connected to the exhaust manifold of the engine and to the pumping pipe. A return pipe is connected to the urea nozzle assembly and is connected to the coolant bypass inlet of the engine. The liquid intake pipe and the liquid return pipe are respectively connected to the pumping pipe through at least one integrated bracket to form an integrated pipeline. The integrated pipeline is detachably connected to the outer wall of the engine through a mounting bracket and / or at least one of the integrated brackets.

2. The urea nozzle cooling system of claim 1, wherein, The coolant bypass inlet and the coolant bypass outlet are arranged adjacent to each other, and both are located between the water pump and the urea nozzle assembly.

3. The urea nozzle cooling system of claim 2, wherein, The urea nozzle cooling system also includes a first channel and a second channel integrated into the engine; wherein... One end of the first channel forms the coolant bypass outlet, and the other end is connected to the engine's cooling water jacket, with the connection position close to the main inlet of the cooling water jacket; one end of the second channel forms the coolant bypass inlet, and the other end is connected to the cooling water jacket, with the connection position close to the main outlet of the cooling water jacket.

4. The urea nozzle cooling system of claim 1, wherein, The liquid intake pipe, the pumping pipe, and the return pipe are all formed by connecting at least one flexible pipe and at least one rigid pipe; wherein, the mounting bracket and each of the integrated brackets are fixedly connected to the rigid pipe.

5. The urea nozzle cooling system of claim 4, wherein, The mounting bracket and each of the integrated brackets have a limiting groove suitable for embedding the rigid tube, and the groove wall of the limiting groove is fixedly connected to the tube wall of the rigid tube.

6. The urea nozzle cooling system as described in claim 1, characterized in that, The mounting bracket and each of the integrated brackets are provided with an extension ear plate, which is bent in the direction away from the engine and is used to fix the surrounding pipes and / or wiring harnesses.

7. The urea nozzle cooling system as described in claim 1, characterized in that, The liquid intake pipe is connected to the pumping pipe via a first integrated bracket, the liquid return pipe is connected to the pumping pipe via a second integrated bracket, and the mounting bracket is connected to the pumping pipe; wherein the mounting bracket and the second integrated bracket are connected to the outer wall of the engine, and are respectively located on both sides of the first integrated bracket.

8. The urea nozzle cooling system as described in claim 7, characterized in that, The mounting bracket is provided with at least one first connection point and at least one anti-turn plate; the first connection point is detachably connected to the connection hole on the outer wall of the engine, and the anti-turn plate is pressed against the step or groove on the outer wall of the engine; the second integrated bracket is provided with at least two second connection points at intervals, and each second connection point is detachably connected to the connection hole on the outer wall of the engine.

9. An engine assembly, characterized in that, Includes the urea nozzle cooling system as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the engine assembly as described in claim 9.

Images