Engine waterway arrangement structure

Abstract

The utility model discloses an engine waterway arrangement structure, an engine comprises a plurality of cylinder bodies, a cylinder cover connected to the cylinder bodies, and a cylinder body waterway arranged in the plurality of cylinder bodies and the cylinder cover, a plurality of water inlets are arranged at an air inlet side, and a plurality of water outlets are arranged at an air outlet side; mutually-communicated cylinder body water channels are arranged on the peripheries of combustion chambers at the bottom ends of the cylinder bodies, and a plurality of water inlets are connected to the sides, close to the air inlets, of the cylinder body water channels and connected with the same water pump through water inlet pipes; and a water outlet is formed above one end of each of the plurality of exhaust ports. After water flows out of the water pump, the water enters the cylinder body through the water inlet holes and then flows into the cylinder cover, so that water flow uniformity and cooling uniformity of a waterway on the cylinder cover are guaranteed, and cooling efficiency and thermal management capacity of an engine are improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile engine manufacturing, in particular to an engine water channel arrangement structure. Background Art

[0002] Gas combustion generates high temperatures within the engine, causing the cylinder head and cylinder block to overheat. To maintain the engine's normal operating temperature, existing technologies primarily rely on water cooling systems. This system uses a water pump to drive coolant through the engine's cylinder block and cylinder head, removing some heat and keeping the engine operating within a suitable temperature range. However, existing multi-cylinder engines have a single water inlet for cooling the cylinder block and cylinder head after the water pump discharges water. This results in uneven water flow in each cylinder, affecting cooling effectiveness. Having only one water inlet makes it difficult to control the coolant flow, making it difficult to ensure uniform cooling and consistent cooling performance across all cylinders.

[0003] Chinese patent publication number CN204783301U, published on November 18, 2015, discloses a utility model entitled "An Engine Cylinder, Engine, and Automobile," which discloses an engine cylinder block, an engine, and an automobile. A cylinder hole is provided on the main body of the engine cylinder block, and the engine cylinder block further comprises: a water channel of a predetermined depth provided on the main body, the cylinder water channel forming a ring around the cross section of the cylinder hole; a water inlet provided at the bottom of the cylinder water channel on the intake side; and a water hole connecting the cylinder water channel with the cylinder head water channel provided on the cylinder head. In the engine cylinder block of this utility model, the coolant enters the water channel through the water inlet, using forced convection. Although this increases the flow rate of the coolant, only one water inlet is provided, and it is difficult to ensure the uniformity of cooling of each cylinder and the consistency of cooling performance. Utility Model Content

[0004] In order to improve the working efficiency of the coolant, the utility model provides a plurality of water inlets on the cylinder body to ensure uniform water flow and cooling in the cooling water path of the cylinder and the cylinder head, thereby improving the thermal efficiency, performance and reliability of the engine.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an engine waterway arrangement structure, wherein the engine includes a plurality of cylinder blocks and cylinder heads connected to the cylinder blocks, including cylinder waterways opened inside the cylinder blocks and cylinder heads, with a plurality of water inlets located on the intake side and a water outlet located on the exhaust side; a plurality of cylinder waterways interconnected with each other are provided around the combustion chamber at the bottom end of the cylinder blocks, with a plurality of water inlets connected to the cylinder waterways near the intake side, and the plurality of water inlets are connected to the same water pump via water inlet pipes; a plurality of water outlets are provided above one end of the exhaust ports. After the water is discharged from the water pump, it enters the cylinder block through a plurality of water inlet holes and then flows into the cylinder head, thereby ensuring uniform water flow and cooling in the waterway on the cylinder head, thereby improving cooling efficiency and the thermal management capability of the engine.

[0006] Preferably, the water outlet is connected to a water outlet pipe, and a thermostat assembly is provided at the bend inside the water outlet pipe. The thermostat assembly can automatically adjust the flow rate according to the temperature of the coolant, optimize the cooling effect, reduce energy waste, and protect the engine from overheating or overcooling.

[0007] Preferably, an oil cooler port is provided on the side of the bend of the water outlet pipe away from the water outlet, and the oil cooler port is connected to the water outlet. The oil cooler port can cool the engine oil at the same time, thereby improving the service life and performance of the lubricating oil and reducing the temperature inside the engine.

[0008] Preferably, the water inlet is located between the two combustion chambers and is connected to the drainage channels symmetrically along the two combustion chambers. The coolant flows into the cylinder water channel through the water inlet and the drainage channels, surrounding the cooling combustion chambers in all directions to achieve uniform cooling and reduce temperature differences between the combustion chambers.

[0009] Preferably, the water inlet at the front end is located between the two combustion chambers at the front end, and the water inlet at the rear end is located between the two combustion chambers at the rear end, and several water inlets are located on the same horizontal line. This symmetrical and evenly distributed water inlet design helps maintain the balance of coolant flow, reduce flow resistance, and improve cooling efficiency.

[0010] Preferably, the water outlet is located on the cylinder head, between the two exhaust ports at the head end. This design helps to more effectively remove heat from the cylinder head, especially on the hot exhaust side. The coolant flows through the outside of each exhaust pipe before flowing out, helping to reduce the thermal load on the engine.

[0011] Preferably, the cylinder water channel forms a ring around the cross section of the combustion chamber, and the top of the cylinder water channel surrounds the outside of several exhaust pipes. The ring water channel design increases the contact area between the coolant and the high-temperature components, thereby enhancing the cooling effect.

[0012] Preferably, the cylinder water channel is provided with several spark plug holes for mounting spark plugs and spark plug coils. Camshaft holes are located on either side of the spark plug holes. One camshaft hole is used to mount the intake camshaft assembly, while the other is used to mount the exhaust camshaft assembly. This integrated design simplifies the engine structure, eliminates additional components and connections, reduces manufacturing costs and maintenance complexity, and improves space utilization and engine compactness.

[0013] The beneficial effects of the present invention are as follows: the present invention ensures uniform water flow and cooling in the cooling water channels of the cylinder and cylinder head by arranging a plurality of water inlets on the cylinder body, thereby improving the thermal efficiency, performance and reliability of the engine, extending the life of the engine, reducing the risk of knocking and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structure diagram of the utility model.

[0015] Figure 2 It is a side view of the present utility model.

[0016] Figure 3 It is a cross-sectional view of the utility model along the AA direction.

[0017] Figure 4 It is a cross-sectional view of the utility model along the BB direction.

[0018] Figure markings: 1: water inlet; 2: water inlet pipe; 3: water pump; 4: air intake; 5: combustion chamber; 6: drainage channel; 7: cylinder block; 8: cylinder head; 9: exhaust port; 10: water outlet; 11: water outlet pipe; 12: thermostat assembly; 13: oil cooler port; 14: exhaust pipe; 15: exhaust camshaft hole; 16: intake camshaft hole; 17: spark plug hole. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1As shown, the present invention is a multi-cylinder engine designed to improve engine cooling efficiency and overall performance. The engine comprises several cylinder blocks 7 and cylinder heads 8 connected to the cylinder blocks 7. In this embodiment, four cylinder blocks 7 are preferably provided, each with a cylinder head 8 above it. These cylinder blocks 7 and cylinder heads 8 together constitute the primary structure of the engine. Chain guide cavities are provided at one end of each cylinder block 7 and cylinder head 8 for accommodating the sprocket chain. These guide cavities extend through the cylinder blocks 7 and cylinder head 8, ensuring stable chain operation and efficient power transmission. The design of the cylinder head 8 is particularly sophisticated, with several intake camshaft holes 16 and exhaust camshaft holes 15 located on the intake and exhaust sides, respectively. In this embodiment, four intake camshaft holes 16 and four exhaust camshaft holes 15 are preferred. The layout of these holes is carefully designed. The four intake camshaft holes 16 are located on one long side of the cylinder head 8, with the line connecting these four intake camshaft holes parallel to the long side of the cylinder head 8. Similarly, the four exhaust camshaft holes 15 are located on the other long side of the cylinder head 8, with the line connecting these four exhaust camshaft holes parallel to the other long side of the cylinder head 8. This design not only ensures precise camshaft installation but also optimizes the engine's spatial layout. The intake camshaft holes 16 and exhaust camshaft holes 15 are located on either side of the spark plug hole 17. This symmetrical layout helps maintain engine balance and stability. The intake and exhaust camshaft holes 16 and 15 on both sides are located in the same plane, further simplifying the engine structure. The intake camshaft holes 16 are used to install the intake camshaft, while the exhaust camshaft holes 15 are used to install the exhaust camshaft. This integrated design simplifies the engine structure, eliminates additional components and connections, reduces manufacturing costs and maintenance complexity, and improves space utilization and engine compactness. On the intake side of the cylinder block 7, there are provided several water inlets 1, preferably two in this embodiment. These water inlets 1 are designed to ensure that the coolant can flow evenly into the cylinder block 7, thereby achieving effective cooling. On the exhaust side of the cylinder head 8, there is provided an outlet, which is located at the end of the cylinder head 8 away from the chain guide cavity. Such a design helps the coolant to be discharged smoothly after flowing through all the exhaust pipes 14, thereby ensuring cooling efficiency. Several water inlets 1 and water outlets 10 are connected to form a cylinder water channel, which ensures uniform water flow and cooling in the cooling water circuit of the cylinder and cylinder head 8, improves the thermal efficiency, performance and reliability of the engine, extends the life of the engine, reduces the risk of knock, reduces energy consumption, and also improves fuel efficiency.

[0021] like Figure 1 、 Figure 2 and Figure 3As shown, in the multi-cylinder engine design of the present invention, each cylinder block 7 is carefully designed with a cylinder water channel. These channels function to guide coolant from the water inlet 1 at the bottom of the cylinder block 7 to the water outlet 10 of the cylinder head 8, ensuring uniform and efficient coolant flow throughout the engine. This design is crucial for maintaining the engine at its optimal operating temperature and helps improve engine performance and lifespan. One end of the cylinder water channel is connected to a water inlet 1. Several water inlets 1 are located on the intake side of the cylinder block 7. These water inlets 1 are responsible for receiving coolant from the water pump 3 and distributing it to each cylinder block 7 and cylinder head 8. In this embodiment, two water inlets 1 are preferably designed. This design not only ensures uniform coolant distribution, but also simplifies the piping layout, reducing system complexity and potential failure points. These two water inlets 1 are connected to water inlet pipes 2, which are then connected to the same water pump 3. After the water is discharged from the water pump 3, it enters the cylinder block 7 through the two water inlets 1, ensuring uniform coolant distribution and flow. The water inlet 1 is located between the two combustion chambers 5 and is connected to the water channel 6. This layout helps the coolant to have more complete contact with the high-temperature area, achieving more effective cooling. One water inlet 1 is connected to two water channels 6. The two water channels 6 are located between the air intake sides of the two combustion chambers 5 and are symmetrical along the symmetry axis of the two combustion chambers 5. This symmetrical water channel 6 design helps the coolant to form a uniform flow around the combustion chambers 5, reducing the disturbance and turbulence of the coolant during the flow process, thereby improving the cooling efficiency. The water inlet 1 at the head end is located between the two combustion chambers 5 at the head end, and the water inlet 1 at the tail end is located between the two combustion chambers 5 at the tail end. The head end is the end of the cylinder body 7 away from the chain guide cavity, and the tail end is the end of the cylinder body 7 close to the chain guide cavity. The two water inlets 1 are located on the same horizontal line and are parallel to the line formed by the four combustion chambers 5. The water inlets 1 are arranged at both the head and the tail to ensure that the cooling water cools the combustion chambers 5 uniformly. In this embodiment, it is preferred that there are two water inlets 1. In other embodiments, several water inlets 1 can be added between the two combustion chambers 5 as needed. This symmetrical and evenly distributed water inlet 1 design helps maintain balanced coolant flow, reducing flow resistance and improving cooling efficiency. Coolant flows through the water inlet 1 and the water channel 6 into the cylinder water channel, surrounding and cooling the combustion chamber 5 in all directions, achieving uniform cooling and reducing temperature differences between combustion chambers 5. The cylinder water channel forms a ring around the cross-section of the combustion chamber 5. This annular water channel design increases the contact area between the coolant and high-temperature components, enhancing the cooling effect. The annular water channel more effectively absorbs and transfers heat from the cylinder block 7 and cylinder head 8, reducing hot spots and improving the engine's thermal efficiency.

[0022] like Figure 1 and Figure 4As shown, a water outlet 10 is provided on the exhaust side of the cylinder head 8. This outlet is located above the exhaust ports 9, between the two exhaust ports 9 at the front end, that is, above the two exhaust ports 9 on the end of the cylinder head 8 away from the chain guide. This layout allows coolant in the cylinder water channel to flow over all exhaust pipes 14 before exiting the water outlet 10 through the thermostat. This design helps more efficiently remove heat from the cylinder head 8, especially on the high-temperature exhaust side, which is crucial for maintaining the engine at optimal operating temperature. The water outlet 10 collects the cooled coolant and returns it to the radiator or other cooling device for recooling and recycling. This design not only improves cooling efficiency but also helps lower the engine's operating temperature, reducing performance degradation and potential damage caused by overheating. The water outlet 10 is connected to a water pipe, and a thermostat assembly 12 is located at the bend inside the water pipe 11. The thermostat assembly 12 automatically adjusts the flow rate based on the coolant temperature, optimizing cooling efficiency, reducing energy waste, and protecting the engine from overheating or undercooling. This intelligent adjustment function of the thermostat assembly 12 is crucial for maintaining the optimal engine temperature under different operating conditions, whether operating at high load or starting at low temperatures. The water outlet 10 is located on the cylinder head 8. Before flowing out, the coolant flows through the outside of each exhaust pipe 14. This design helps reduce the engine's thermal load. The exhaust pipe 14 is one of the hottest components in the engine. The coolant can absorb and remove heat from these components before flowing out, thereby reducing the temperature of the entire engine. An oil cooler port 13 is provided at the bend of the water outlet pipe 11, away from the water outlet 10. The oil cooler port 13 is connected to the oil cooler pipeline. The oil cooler water flows through this pipe, connecting the oil cooler port 13 and the water outlet 10. This design allows the engine oil to be cooled simultaneously through the oil cooler port 13, thereby improving the service life and performance of the lubricant. The temperature of the lubricant has a direct impact on the performance and life of the engine. Excessive temperature can cause the lubricant to age and fail prematurely, while effective cooling can extend its replacement cycle and reduce maintenance costs. At the same time, by cooling the engine oil, the temperature inside the engine can be reduced, further reducing the risk of engine failure due to overheating. This comprehensive cooling strategy not only improves engine efficiency, but also enhances its reliability and durability.

[0023] The cylinder water channel is a key component of the engine cooling system. It not only directs coolant to key engine locations but also performs other important functions. In the present invention, several spark plug holes are designed within the cylinder water channel. In this embodiment, four holes are preferred. These holes are primarily used to install the spark plugs and their high-voltage coils. The spark plug holes 17 are carefully positioned between the intake and exhaust camshaft holes. This layout helps maintain the symmetry and balance of the engine's overall structure. The placement of the spark plug holes 17 within the cylinder water channel allows the cooling water to cool the spark plug holes as it flows. Spark plugs generate high temperatures during engine operation, especially under high speed or high load conditions. Therefore, the cooling effect of the cooling water on them is crucial to the spark plug's life and performance. Cooling the spark plug holes 17 effectively reduces the spark plug's operating temperature and reduces thermal stress, thereby extending the spark plug's service life and improving ignition efficiency and engine combustion efficiency. In traditional engine designs, the spark plug and high-pressure coil may require additional cooling systems or components. However, the present invention reduces these additional requirements by integrating the spark plug hole 17 into the cylinder water channel. This design reduces manufacturing costs by reducing the number of parts and assembly complexity, while also reducing potential failure points and improving engine reliability.

[0024] Working process.

[0025] 1. Water pump 3 starts.

[0026] When the engine starts, water pump 3, a core component of the cooling system, begins operating. Its primary function is to pump coolant from the radiator and deliver it to the engine through water inlet pipe 2. The activation of water pump 3 signals the start of the cooling system's operation, ensuring coolant circulates throughout the system, thereby maintaining a stable engine temperature.

[0027] 2. Coolant distribution.

[0028] Coolant is evenly distributed to the two water inlets 1 through the water inlet pipe 2. This distribution process is crucial, as it ensures that coolant enters the cylinder water channel evenly, avoiding local overheating caused by uneven flow. The design position of the water inlets 1 and the layout of the water diversion channel 6 together achieve all-around cooling of the combustion chamber 5. This design helps to reduce temperature differences between the combustion chambers 5 and ensure uniform temperature distribution within the engine.

[0029] 3. Cooling process.

[0030] After entering the cylinder water channel through water inlet 1, the coolant flows along the internal paths of cylinder block 7 and cylinder head 8. Inside cylinder block 7, the coolant first absorbs heat from the combustion chamber before continuing to flow to cylinder head 8. Inside cylinder head 8, the coolant further absorbs heat generated by the high-temperature exhaust port. During this process, the coolant temperature gradually rises, but it also removes a large amount of heat, helping to maintain the temperature of cylinder head 8 within a safe range. Ultimately, the heated coolant returns to the radiator through water outlet 10. The design position of water outlet 10 helps to more effectively remove heat from cylinder head 8, reducing the thermal load and protecting the engine from overheating.

[0031] 4. Thermostat adjustment and oil cooler operation.

[0032] When the coolant flows through the outlet pipe 11, the thermostat assembly 12 therein automatically adjusts the flow rate according to the temperature of the coolant. The function of the thermostat assembly 12 is to ensure that the engine operates at an appropriate temperature to prevent overheating or overcooling. When the coolant temperature is low, the thermostat assembly 12 will reduce the amount of coolant flowing to the radiator, allowing the engine to heat up quickly; when the coolant temperature is too high, the thermostat assembly 12 will increase the amount of coolant flowing to the radiator to help the engine dissipate heat. In addition, the oil cooler port 13 is located on the side of the bend in the outlet pipe 11 away from the outlet 10. It also cools the engine oil, improving the performance and service life of the lubricating oil, while reducing the temperature inside the engine, reducing wear, and improving engine efficiency.

[0033] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An engine waterway arrangement structure, the engine includes a plurality of cylinder blocks and cylinder heads connected to the cylinder blocks, characterized in that: It includes cylinder water channels opened inside a plurality of cylinder blocks and cylinder heads, with a plurality of water inlets located on the intake side and a water outlet located on the exhaust side; A plurality of cylinder water channels are provided around the combustion chamber at the bottom of the cylinder blocks, and the cylinder water channels are connected to a plurality of water inlets on one side close to the air inlet. The plurality of water inlets are connected to the same water pump through water inlet pipes. A water outlet is provided above one end of the plurality of exhaust ports.

2. The engine waterway arrangement structure according to claim 1, characterized in that: The water outlet is connected to the water outlet pipe, and a thermostat assembly is provided at the inner bending part of the water outlet pipe.

3. The engine waterway arrangement structure according to claim 2, characterized in that: An oil cooler port is provided on the side of the water outlet pipe bending portion away from the water outlet, and the oil cooler port is communicated with the water outlet.

4. The engine water channel arrangement structure according to claim 1, characterized in that: The water inlet is located between the two combustion chambers, and the water inlet is communicated with a plurality of drainage channels, and the plurality of drainage channels are symmetrical along the symmetry axes of the two combustion chambers.

5. An engine water channel arrangement structure according to claim 1 or 4, characterized in that: The water inlet at the head end is located between the two combustion chambers at the head end, the water inlet at the tail end is located between the two combustion chambers at the tail end, and the multiple water inlets are located on the same horizontal line.

6. An engine waterway arrangement structure according to claim 1, 2 or 3, characterized in that: The water outlet is located on the cylinder head, and the water outlet is located between the two exhaust ports at the head end.

7. The engine waterway arrangement structure according to claim 1, characterized in that: The cylinder water channel forms a ring around the cross section of the combustion chamber, and the top end of the cylinder water channel surrounds the outsides of several exhaust pipes.

8. An engine water channel arrangement structure according to claim 1 or 7, characterized in that: There are several spark plug holes in the cylinder water channel, and camshaft holes are provided on both sides of the spark plug holes.

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