Engine water jacket structure and engine

Abstract

The application belongs to the technical field of engines and relates to an engine water jacket structure and an engine. The engine water jacket structure comprises a cylinder body water jacket and a first flow separation member. The cylinder body water jacket covers each cylinder. The cylinder body water jacket is internally provided with an air intake side cooling chamber, an exhaust side cooling chamber, a first communication chamber, a second communication chamber, a water inlet and a water outlet. The air intake side cooling chamber is communicated with the exhaust side cooling chamber through the first communication chamber and the second communication chamber. The water inlet is communicated in the air intake side cooling chamber and is arranged adjacent to the first communication chamber. The water outlet is communicated in the exhaust side cooling chamber. The first flow separation member is arranged in the first communication chamber to form a first flow separation hole in the first communication chamber, the flow area of which is smaller than that of the first communication chamber. One of the first communication chamber and the second communication chamber is arranged on the front side of the cylinder body water jacket, and the other is arranged on the rear side of the cylinder body water jacket. The engine water jacket structure can improve the cooling effect of the exhaust side of the engine.

Description

Technical Field

[0001] This invention belongs to the field of engine technology, and in particular relates to an engine water jacket structure and an engine. Background Technology

[0002] In existing technology, an engine water jacket structure exists for engine cooling, including a cylinder block water jacket and upper and lower cylinder head water jackets respectively connected to the cylinder block water jacket. A water jacket baffle is installed inside the cylinder block water jacket, and the water flow rate in the cylinder block water jacket, upper cylinder head water jacket, and lower cylinder head water jacket is adjusted by changing the height of the baffle. However, since the water inlet of the cylinder block water jacket is usually located on the engine intake side, the cooling effect on the engine exhaust side is poor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an engine water jacket structure and an engine, which addresses the problem that the existing engine water jacket structure results in poor cooling effect on the exhaust side of the engine.

[0004] To solve the above-mentioned technical problems, on the one hand, embodiments of the present invention provide an engine water jacket structure, including an intake-side cooling chamber, an exhaust-side cooling chamber, a first connecting chamber, a second connecting chamber, a water inlet, and a water outlet;

[0005] The intake-side cooling chamber is connected to the exhaust-side cooling chamber through the first connecting chamber and the second connecting chamber, respectively. The water inlet is connected to the intake-side cooling chamber and is located adjacent to the first connecting chamber. The water outlet is connected to the exhaust-side cooling chamber.

[0006] A first flow-blocking element is provided in the first connecting chamber to form a first flow-blocking hole with a flow cross-sectional area smaller than that of the first connecting chamber.

[0007] According to the engine water jacket structure of the present invention, a first flow-blocking element is provided in the first communicating chamber to form a first flow-blocking hole with a flow cross-sectional area smaller than that of the first communicating chamber. On the one hand, this can increase the proportion of coolant flowing in the direction of the second communicating chamber, making the coolant distribution in the exhaust-side cooling chamber more uniform. On the other hand, the reduction in the flow cross-sectional area of ​​the first flow-blocking hole increases the velocity of the coolant passing through the first flow-blocking hole, thereby improving the cooling effect of the exhaust-side cooling chamber.

[0008] Optionally, the water outlet is located adjacent to the second communicating chamber.

[0009] Optionally, the engine water jacket structure further includes a cylinder block water jacket, wherein the intake-side cooling chamber, the exhaust-side cooling chamber, the first connecting chamber, the second connecting chamber, the water inlet, and the water outlet are respectively formed within the cylinder block water jacket; one of the first connecting chamber and the second connecting chamber is located on the front side of the cylinder block water jacket, and the other is located on the rear side of the cylinder block water jacket.

[0010] Optionally, the first flow-blocking component includes a first flow-blocking rib formed by the outer or inner sidewall of the cylinder water jacket recessed into the first communicating cavity, and the first flow-blocking rib is integrally formed with the cylinder water jacket.

[0011] Optionally, the engine water jacket structure further includes a second flow-blocking element; the second flow-blocking element is disposed in the second communicating chamber to form a second flow-blocking hole in the second communicating chamber with a flow cross-sectional area smaller than that of the second communicating chamber.

[0012] Optionally, the flow cross-sectional area of ​​the first flow-blocking orifice is smaller than the flow cross-sectional area of ​​the second flow-blocking orifice.

[0013] Optionally, the second flow-blocking component includes a second flow-blocking rib formed by the outer or inner sidewall of the cylinder water jacket recessed into the second communicating cavity, and the second flow-blocking rib is integrally formed with the cylinder water jacket.

[0014] Optionally, the engine water jacket structure further includes multiple inter-cylinder connecting members;

[0015] The cylinder body water jacket encloses multiple cylinder areas, and at least one cylinder interconnector is provided between adjacent cylinder areas;

[0016] Each of the cylinder communication components is provided with an inter-cylinder cooling channel, which is connected to the intake-side cooling chamber and the exhaust-side cooling chamber respectively.

[0017] Optionally, the engine water jacket structure further includes a cylinder head water jacket, which includes an upper water jacket and a lower water jacket, with the lower water jacket located between the upper water jacket and the cylinder block water jacket.

[0018] The upper water jacket is provided with a first main water inlet and a first drain outlet, and the lower water jacket is provided with a second main water inlet and a second drain outlet.

[0019] The cylinder water jacket is provided with an upper main water inlet and a lower main water inlet. The upper main water inlet is connected to the first main water inlet, and the lower main water inlet is connected to the second main water inlet.

[0020] Both the upper main water inlet and the lower main water inlet are located on the front side of the cylinder water jacket.

[0021] Optionally, the upper water jacket is further provided with an upper cooling area for the exhaust duct and an outlet cooling area for the exhaust duct. The upper cooling area for the exhaust duct covers the upper part of each exhaust duct, and the outlet cooling area for the exhaust duct surrounds the outlet of each exhaust duct. A first flow path and a second flow path are formed between the first main inlet and the first outlet. The first flow path flows through the upper cooling area for the exhaust duct, and the second flow path flows through the outlet cooling area for the exhaust duct.

[0022] The lower water jacket is also provided with a cooling area at the lower part of the exhaust channel, which covers the lower part of each exhaust channel. A third flow path is formed between the second main water inlet and the second water outlet, and the third flow path flows through the cooling area at the lower part of the exhaust channel.

[0023] A first liquid flow channel and a second liquid flow channel are provided between the upper water jacket and the lower water jacket to allow communication between the two. The lower water jacket is also provided with a fourth flow path and a fifth flow path that are respectively connected to the second main water inlet. The fourth flow path is connected to the upper cooling area of ​​the exhaust duct through the first liquid flow channel, and the fifth flow path is connected to the outlet cooling area of ​​the exhaust duct through the second liquid flow channel.

[0024] Optionally, a plurality of chambers for exhaust passage are provided between the upper water jacket and the lower water jacket. The plurality of chambers are provided in a one-to-one correspondence with each exhaust passage, and a cooling channel is formed between each pair of adjacent chambers.

[0025] One end of one of the cooling channels is connected to the lower water jacket, and the second end is connected to the other cooling channels respectively.

[0026] Optionally, a first guide plate is provided in the upper cooling area of ​​the exhaust duct at the position between the upper parts of each pair of adjacent exhaust ducts. Each first guide plate is formed with a guide hole extending along the upper arrangement direction of each exhaust duct. The coolant in the first flow path flows to the first drain outlet through each of the guide holes.

[0027] The upper water jacket is also provided with a second guide plate extending from the upper cooling area of ​​the exhaust duct to the outlet cooling area of ​​the exhaust duct, and the coolant in the second flow path flows to the first exhaust cooling area through the second guide plate.

[0028] Optionally, the lower water jacket is further provided with a nose bridge cooling area, the nose bridge cooling area corresponding to the nose bridge area of ​​each exhaust channel;

[0029] The nose bridge cooling area is provided with a nose bridge cooling channel with a nose bridge water inlet at the position of the nose bridge area of ​​each exhaust channel. The coolant entering the nose bridge cooling channel through the nose bridge water inlet can merge with the third flow path.

[0030] Each cylinder water jacket has a nose bridge water inlet at the position corresponding to each cylinder, and each nose bridge water inlet is connected to the corresponding nose bridge water inlet.

[0031] Optionally, the area of ​​the plurality of nose bridge nozzles decreases sequentially from the direction near the front end of the engine to the direction near the rear end of the engine.

[0032] Optionally, the areas of the multiple nasal bridge inlets decrease sequentially in a proportional manner.

[0033] Optionally, the upper main water inlet is connected to the first connecting chamber between the first flow-blocking hole and the air intake side cooling chamber, and the lower main water inlet is connected to the first connecting chamber between the first flow-blocking hole and the exhaust side cooling chamber.

[0034] Optionally, the lower water jacket is further provided with an auxiliary cooling area and a secondary water inlet. The auxiliary cooling area corresponds to the cooling area at the outlet of the exhaust duct. The nose bridge cooling area is located on the side of the lower cooling area of ​​the exhaust duct facing the auxiliary cooling area, and the secondary water inlet is located on the side of the nose bridge cooling area facing the auxiliary cooling area.

[0035] The coolant entering the lower water jacket through the secondary inlet flows through the auxiliary cooling area to the second outlet.

[0036] Optionally, the lower water jacket is also provided with an auxiliary water inlet hole, through which the coolant entering the lower water jacket merges with the third flow path.

[0037] On the other hand, embodiments of the present invention also provide an engine that includes the engine water jacket structure described above. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an engine water jacket structure provided in an embodiment of the present invention;

[0039] Figure 2 This is a top view of an engine water jacket structure provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the principle of an engine water jacket structure provided in an embodiment of the present invention;

[0041] Figure 4 yes Figure 1 Schematic diagram of the water jacket in the middle cylinder block;

[0042] Figure 5 yes Figure 1 Schematic diagram of the water jacket of the cylinder head;

[0043] Figure 6 yes Figure 5 Flow path diagram of the upper and middle water jacket;

[0044] Figure 7 yes Figure 5 Flow path diagram of the middle and lower water jacket;

[0045] Figure 8 yes Figure 5 A schematic diagram of the flow path of the cylinder head water jacket at the intake manifold area;

[0046] Figure 9 yes Figure 5 A cross-sectional view of the cylinder head water jacket at the first main inlet and the second main inlet.

[0047] The reference numerals in the accompanying drawings are as follows:

[0048] 1. Lower water jacket; 11. Second main water inlet; 12. Second drain outlet; 13. Cooling area below the exhaust duct; 14. Nose bridge cooling area; 15. Nose bridge cooling channel; 151. Nose bridge water inlet; 16. Auxiliary cooling area; 17. Secondary water inlet; 18. Third guide plate; 19. Auxiliary water inlet hole;

[0049] 2. Upper water jacket; 21. First main water inlet; 22. First drain outlet; 23. Upper cooling area of ​​exhaust duct; 24. Cooling area of ​​exhaust duct outlet; 25. First guide plate; 251. Guide hole; 26. Second guide plate; 27. Air outlet;

[0050] 3. First fluid flow channel;

[0051] 4. Second fluid flow channel;

[0052] 5. Cooling channels; 5a. First cooling channel; 5b. Second cooling channel; 5c. Third cooling channel;

[0053] 6. Chamber;

[0054] 7. Cylinder block water jacket; 71. Inlet; 72. Outlet; 73. Side where the intake cooling chamber is located; 74. Side where the exhaust cooling chamber is located; 75. Side where the first connecting chamber is located; 76. Side where the second connecting chamber is located; 77. Upper main inlet; 78. Lower main inlet; 79. Nose bridge inlet;

[0055] 8. First flow-blocking component; 81. First flow-blocking rib;

[0056] 9. Second flow divider; 91. Second flow divider rib;

[0057] 10. Inter-cylinder connecting parts. Detailed Implementation

[0058] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0059] like Figures 1 to 9 As shown, the engine water jacket structure provided in this embodiment of the invention includes an intake-side cooling chamber, an exhaust-side cooling chamber, a first connecting chamber, a second connecting chamber, a water inlet 71, and a water outlet 72. In the figures, for ease of understanding, the side containing the intake-side cooling chamber is marked as 73, the side containing the exhaust-side cooling chamber is marked as 74, the side containing the first connecting chamber is marked as 75, and the side containing the second connecting chamber is marked as 76.

[0060] The intake-side cooling chamber is connected to the exhaust-side cooling chamber through the first connecting chamber and the second connecting chamber, respectively. The water inlet 71 is connected to the intake-side cooling chamber and is located adjacent to the first connecting chamber. The water outlet 72 is connected to the exhaust-side cooling chamber.

[0061] A first flow-blocking element 8 is provided in the first connecting chamber to form a first flow-blocking hole with a flow cross-sectional area smaller than that of the first connecting chamber.

[0062] The engine water jacket structure provided in this embodiment of the invention includes a first flow-blocking element 8 in the first communicating chamber to form a first flow-blocking hole with a flow cross-sectional area smaller than that of the first communicating chamber. On the one hand, this increases the proportion of coolant in the direction of the second communicating chamber, making the coolant distribution in the exhaust-side cooling chamber near the engine exhaust side more uniform. On the other hand, the reduction in the flow cross-sectional area of ​​the first flow-blocking hole increases the velocity of the coolant passing through the first flow-blocking hole, thereby improving the cooling effect of the exhaust-side cooling chamber.

[0063] It should be noted that, in this embodiment of the invention, the front side of the cylinder water jacket 7 refers to the side of the cylinder water jacket 7 closest to the front end of the engine, and the rear side of the cylinder water jacket 7 refers to the side of the cylinder water jacket 7 closest to the rear end of the engine. Further, in this embodiment of the invention, "front side" refers to the side closest to the front end of the engine, and "rear side" refers to the side closest to the rear end of the engine.

[0064] In an engine, multiple cylinders are typically used for operation, and each cylinder has a corresponding exhaust port so that the gas in each cylinder can be discharged through the corresponding exhaust port. In the prior art, the exhaust ports are usually integrated and installed in the cylinder head. In order to adapt to other structures, the exhaust ports often need to be bent. During exhaust, some or all of the exhaust ports also need to be finally collected in the gas passage collection area.

[0065] In this embodiment of the invention, on the one hand, the cylinder body water jacket 7 is used to wrap the cylinder body of each cylinder to cool the cylinder body; on the other hand, the cylinder head water jacket is used to cool the exhaust passage on the cylinder head corresponding to each cylinder to achieve a better cooling effect.

[0066] exist Figure 4 In the illustrated embodiment, the water outlet 72 is located adjacent to the second communicating chamber.

[0067] In one embodiment, such as Figure 4 As shown, the engine water jacket structure also includes a cylinder block water jacket 7. The intake-side cooling chamber, exhaust-side cooling chamber, first connecting chamber, second connecting chamber, water inlet 71, and water outlet 72 are respectively formed within the cylinder block water jacket 7. One of the first connecting chamber and the second connecting chamber is located on the front side of the cylinder block water jacket 7, and the other is located on the rear side of the cylinder block water jacket 7. Figure 4 In the illustrated embodiment, the first communicating chamber is located on the front side of the cylinder water jacket 7, and the second communicating chamber is located on the rear side of the cylinder water jacket 7.

[0068] In one embodiment, such as Figure 4 As shown, the first flow-blocking component 8 includes a first flow-blocking rib 81 formed by the outer or inner side wall of the cylinder water jacket 7 recessed into the first communicating cavity. The first flow-blocking rib 81 is integrally formed with the cylinder water jacket 7.

[0069] Preferably, the height of the first flow-blocking rib 81 along the axial direction of the cylinder water jacket 7 is 64mm, accounting for approximately 90% of the depth of the cylinder water jacket 7, and the height of the coolant flow through the first flow-blocking hole is approximately 6mm. Furthermore, since a rib 81 that is too wide would be detrimental to cylinder bore cooling, while a rib that is too narrow would easily cause mold pull during the casting process, making mold forming difficult, the width of the first flow-blocking rib 81 in this invention is approximately 8mm. Considering the water jacket casting process, the draft angle of the first flow-blocking rib 81 is larger than the general casting design angle, approximately 8°.

[0070] In one embodiment, such as Figure 4As shown, the engine water jacket structure also includes a second flow-blocking element 9. The second flow-blocking element 9 is disposed within the second communicating chamber to form a second flow-blocking orifice within the second communicating chamber with a flow cross-sectional area smaller than that of the second communicating chamber. By reducing the flow cross-sectional area of ​​the second flow-blocking orifice, the velocity of the coolant passing through the second flow-blocking orifice is increased, thereby improving the cooling effect of the exhaust-side cooling chamber.

[0071] In one embodiment, the combined use of the first flow-blocking hole and the second flow-blocking hole can improve the cooling effect.

[0072] In one embodiment, such as Figure 4 As shown, the flow cross-sectional area of ​​the second flow-blocking hole is larger than that of the first flow-blocking hole, thereby increasing the front resistance of the cylinder water jacket 7 and reducing the rear resistance of the cylinder water jacket 7.

[0073] In one embodiment, such as Figure 4 As shown, the second flow-blocking component 9 includes a second flow-blocking rib 91 formed by the outer or inner side wall of the cylinder water jacket 7 recessed into the second communicating cavity. The second flow-blocking rib 91 is integrally formed with the cylinder water jacket 7.

[0074] Preferably, the second flow-blocking rib 91 has a height of 15 mm along the axial direction of the cylinder water jacket 7, accounting for approximately 20% of the depth of the cylinder water jacket 7, and the coolant flows through the second flow-blocking hole at a height of approximately 55 mm. The width of the second flow-blocking rib 91 is 8 mm. The first flow-blocking rib 81 is approximately 49 mm higher than the second flow-blocking rib 91, the purpose of which is to increase the resistance at the front end of the cylinder water jacket 7 and reduce the resistance at the rear end of the cylinder water jacket 7.

[0075] In one embodiment, both the first baffle 81 and the second baffle 91 are located at the center plane of the cylinder bore along the front and rear end direction of the engine. To reduce the problem of cylinder bore deformation caused by the transmission of cylinder head bolt force through the baffles, both the first baffle 81 and the second baffle 91 are located away from the bolt positions on the cylinder head.

[0076] In one embodiment, such as Figure 4 As shown, the engine water jacket structure also includes multiple inter-cylinder connecting parts 10.

[0077] The cylinder block water jacket 7 encloses multiple cylinder regions, and at least one cylinder interconnector 10 is provided between adjacent cylinder regions. Each cylinder interconnector 10 is provided with an inter-cylinder cooling channel, which is respectively connected to the intake-side cooling chamber and the exhaust-side cooling chamber.

[0078] Adjusting the height of the first flow-blocking rib 81 and the second flow-blocking rib 91 can also increase the pressure difference between the intake and exhaust sides of the cylinder water jacket 7, causing the water flow direction of the inter-cylinder cooling channel to flow from the intake side cooling chamber to the exhaust side cooling chamber, thereby increasing the water flow velocity of the inter-cylinder cooling channel and reducing the inter-cylinder heat load.

[0079] In one embodiment, such as Figures 1 to 9 As shown, the engine water jacket structure also includes a cylinder head water jacket, which includes a lower water jacket 1 and an upper water jacket 2. The lower water jacket 1 is located between the upper water jacket 2 and the cylinder block water jacket 7.

[0080] The upper water jacket 2 is provided with a first main water inlet 21 and a first drain outlet 22, and the lower water jacket 1 is provided with a second main water inlet 11 and a second drain outlet 12.

[0081] The cylinder water jacket 7 is provided with an upper main water inlet 77 and a lower main water inlet 78. The upper main water inlet 77 is connected to the first main water inlet 21, and the lower main water inlet 78 is connected to the second main water inlet 11.

[0082] Preferably, the upper main water inlet 77 and the lower main water inlet 78 are both located on the front side of the cylinder water jacket 7.

[0083] In one embodiment, such as Figures 5 to 9 As shown, the upper water jacket 2 is further provided with an upper cooling area 23 for the exhaust ducts and an outlet cooling area 24 for the exhaust ducts. The upper cooling area 23 covers the upper part of each exhaust duct, and the outlet cooling area 24 surrounds the outlet of each exhaust duct. A first flow path and a second flow path are formed between the first main inlet 21 and the first outlet 22. The first flow path flows through the upper cooling area 23 for the exhaust ducts, and the second flow path flows through the outlet cooling area 24 for the exhaust ducts. Understandably, the coolant in the second flow path will merge with the first flow path before flowing to the first outlet 22.

[0084] The lower water jacket 1 is also provided with a lower cooling area 13 for the exhaust duct. The lower cooling area 13 for the exhaust duct covers the lower part of each exhaust duct. A third flow path is formed between the second main water inlet 11 and the second drain outlet 12. The third flow path flows through the lower cooling area 13 for the exhaust duct.

[0085] A first liquid flow channel 3 and a second liquid flow channel 4 that enable the upper water jacket 2 to communicate with the lower water jacket 1 are provided between the upper water jacket 2 and the lower water jacket 1. A fourth flow path and a fifth flow path that are respectively connected to the second main water inlet 11 are further provided on the lower water jacket 1. The fourth flow path communicates with the upper cooling region 23 of the exhaust passage through the first liquid flow channel 3, and the fifth flow path communicates with the outlet cooling region 24 of the exhaust passage through the second liquid flow channel 4.

[0086] A first flow path and a second flow path are formed in the upper water jacket 2 to cool the upper parts of the exhaust passages and the outlets of the exhaust passages respectively. A third flow path is formed in the lower water jacket 1 to cool the lower parts of the exhaust passages. By providing the first liquid flow channel 3 and the second liquid flow channel 4 between the upper water jacket 2 and the lower water jacket 1, the coolant in the fourth flow path and the fifth flow path in the lower water jacket 1 can flow into the upper water jacket 2, and specifically supplement the cooling of the outlets and the upper parts of the exhaust passages, enhancing the cooling of the upper parts and the outlet regions of the exhaust passages.

[0087] In one embodiment, as Figure 8 shown, a plurality of chambers 6 through which the exhaust passages can pass are further provided between the upper water jacket 2 and the lower water jacket 1. The plurality of chambers 6 are provided corresponding to the exhaust passages one by one, and a cooling channel 5 is formed between every two adjacent chambers 6.

[0088] The first end of one of the cooling channels 5 is connected to the lower water jacket 1, and the second end is respectively connected to the other cooling channels 5, so that the coolant in the lower water jacket 1 can flow into each of the cooling channels 5 to specifically cool the exhaust passages in the airway gathering area.

[0089] As Figure 8 shown in the embodiment, in the airway gathering area, the exhaust passages of the second cylinder and the third cylinder converge into a channel above the "pin" shape. Correspondingly, the number of the chambers 6 is three, the three chambers 6 are distributed in a pin shape, and the number of the cooling channels 5 is three.

[0090] Further, the three cooling channels 5 are respectively a first cooling channel 5a, a second cooling channel 5b, and a third cooling channel 5c. Among them, the first end of the first cooling channel 5a is connected to the lower water jacket 1, the second end of the first cooling channel 5a is connected to the first ends of the second cooling channel 5b and the third cooling channel 5c, and the second ends of the second cooling channel 5b and the third cooling channel 5c are connected to the upper water jacket 2.

[0091] Part of the coolant in the lower water jacket 1 can flow through the first cooling channel 5a and the second cooling channel 5b to the upper cooling area 23 of the exhaust duct and merge with the first flow path. Part of the coolant in the lower water jacket 1 can flow through the first cooling channel 5a and the third cooling channel 5c to the exhaust outlet cooling area 24 and merge with the second flow path.

[0092] The air passage convergence area has a high temperature, and this area must be cooled in a targeted manner. In this embodiment of the invention, the coolant in the lower water jacket 1 can be partially passed through the first cooling channel 5a to the air passage convergence area through the second cooling channel 5b and the third cooling channel 5c respectively to the upper water jacket 2, so that the coolant surrounds the air passage convergence area for cooling, thereby specifically cooling the air passage convergence area.

[0093] In one embodiment, such as Figure 8 As shown, the aperture of each cooling channel 5 is 4mm-8mm.

[0094] In one embodiment, such as Figure 6 As shown, a first guide plate 25 is provided in the upper cooling area 23 of the exhaust duct at the position between each pair of adjacent exhaust ducts. Each first guide plate 25 has a guide hole 251 extending along the upper arrangement direction of each exhaust duct. The coolant in the first flow path flows to the first drain outlet 22 through each of the guide holes 251. The first guide plate 25 can guide the coolant in the first flow path and ensure the flow direction of the coolant in the first flow path.

[0095] Furthermore, the upper water jacket 2 is also provided with a second guide plate 26 extending from the upper cooling area 23 of the exhaust duct to the exhaust duct outlet cooling area 24. The coolant in the second flow path flows to the exhaust duct outlet cooling area 24 via the second guide plate 26. The second guide plate 26 can guide the coolant in the second flow path, ensuring that the coolant in the second flow path flows to the outlet position of each exhaust duct.

[0096] In one embodiment, such as Figure 8 As shown, the upper water jacket 2 is designed with vent holes 27 near the outlet of each exhaust channel to remove water vapor generated by high temperature.

[0097] In one embodiment, such as Figure 4 and Figure 7 As shown, the lower water jacket 1 is also provided with a nose bridge cooling area 14, which corresponds to the nose bridge area of ​​each exhaust channel.

[0098] The nose bridge cooling area 14 is provided with a nose bridge cooling channel 15 with a nose bridge water inlet 151 at the position of the nose bridge area of ​​each exhaust channel. The coolant entering the nose bridge cooling channel 15 through the nose bridge water inlet 151 can merge with the third flow path.

[0099] Each cylinder water jacket 7 is provided with a nose bridge water inlet 79 corresponding to the position of each cylinder, and each nose bridge water inlet 79 is connected to the corresponding nose bridge water inlet 151.

[0100] Each of the above-mentioned nose bridge water inlets 79 is connected to the exhaust-side cooling chamber. The above-mentioned nose bridge water inlets 79 can directly guide the coolant to the vicinity of the nose bridge area of ​​each exhaust channel, and provide targeted cooling to the nose bridge area of ​​each exhaust channel, thereby reducing the heat load of the nose bridge area.

[0101] In one embodiment, such as Figure 4 As shown, the areas of the plurality of nose bridge water inlets 79 decrease sequentially from the direction near the front end of the engine to the direction near the rear end of the engine. By making the areas of the nose bridge water inlets 79 decrease sequentially, the amount of coolant flowing to each nose bridge area is made substantially consistent.

[0102] Preferably, the areas of the plurality of nasal bridge water inlets 79 decrease sequentially in a proportional manner. In the illustrated embodiment, the ratio of the area of ​​the first nasal bridge water inlet 79 to the area of ​​the nth nasal bridge water inlet 79 is 2. n :1.

[0103] In the illustrated embodiment, cylinders 1 (i.e., the first cylinder), 2 (i.e., the second cylinder), 3 (i.e., the third cylinder), and 4 (i.e., the fourth cylinder) are arranged sequentially along the direction from the front end of the engine to the rear end of the engine, i.e., the front-rear direction of the engine. The water flow direction of the cylinder water jacket 7 near the engine intake side is from cylinder 1 to cylinder 4, and the water flow direction of the cylinder water jacket 7 near the engine exhaust side is from cylinder 4 to cylinder 1. Therefore, the pressure of the cylinder water jacket 7 at cylinder 4 is higher than that at cylinder 1. Therefore, it is necessary to adjust the area of ​​each water inlet in the four cylinders to ensure that the flow rate in each nose area is uniform.

[0104] exist Figure 4To facilitate differentiation of the various nose bridge water inlets 79, the four nose bridge water inlets 79 are respectively labeled as first nose bridge water inlet 79a, second nose bridge water inlet 79b, third nose bridge water inlet 79c, and fourth nose bridge water inlet 79d. Specifically, first nose bridge water inlet 79a corresponds to cylinder 1, second nose bridge water inlet 79b corresponds to cylinder 2, third nose bridge water inlet 79c corresponds to cylinder 3, and fourth nose bridge water inlet 79d corresponds to cylinder 4. The area ratio of each nose bridge water inlet 79 is approximately: fourth nose bridge water inlet 79d : third nose bridge water inlet 79c : second nose bridge water inlet 79b : first nose bridge water inlet 79a = 1 : 2 : 4 : 8.

[0105] By setting the area of ​​each of the water inlets 79 on the bridge of the nose, the flow distribution between the upper water jacket 2 and the lower water jacket 1 can be changed. The flow distribution between the upper water jacket 2 and the lower water jacket 1 is approximately 4:7.

[0106] In one embodiment, such as Figure 4 As shown, the upper main water inlet 77 is connected to the first connecting chamber between the first flow-blocking hole and the air intake side cooling chamber, and the lower main water inlet 78 is connected to the first connecting chamber between the first flow-blocking hole and the exhaust side cooling chamber.

[0107] The number and area of ​​the water inlets on the exhaust-side cooling chamber side (including the upper main water inlet 77 and each nose bridge water inlet 79) are greater than those on the intake-side cooling chamber side (including the lower main water inlet 78). This is because the thermal load on the exhaust side of the cylinder head is higher than that on the intake side, and the water flow requirement on the exhaust side is higher than that on the intake side. Preferably, the upper main water inlet 77 and the lower main water inlet 78 are located on both sides of the first baffle rib 81, and the area ratio of the upper main water inlet 77 to the lower main water inlet 78 is approximately 1:1.

[0108] In one embodiment, such as Figure 7 As shown, the lower water jacket 1 is also provided with an auxiliary cooling area 16 and a secondary water inlet 17. The auxiliary cooling area 16 corresponds to the exhaust outlet cooling area 24. The nose bridge cooling area 14 is located on the side of the lower exhaust cooling area 13 facing the auxiliary cooling area 16. The secondary water inlet 17 is located on the side of the nose bridge cooling area 14 facing the auxiliary cooling area 16.

[0109] The coolant entering the lower water jacket 1 through the secondary inlet 17 flows through the auxiliary cooling area 16 to the second outlet 12.

[0110] The lower water jacket 1 is designed with 8 secondary water inlets 17 on the exhaust side. Each exhaust channel has two inlets in the nose area. Depending on the actual usage requirements, water can be selected to enter some of the secondary water inlets 17, which mainly cool the exhaust channel and assist in cooling the upper water jacket 2.

[0111] In one embodiment, such as Figure 7 As shown, the lower water jacket 1 is also provided with a third guide plate 18 extending from the secondary water inlet 17 to the auxiliary cooling area 16. The water entering through the secondary water inlet 17 flows along the third guide plate 18 to the auxiliary cooling area 16. The coolant guided by the third guide plate 18 can first flow longitudinally, and then change to flow laterally after reaching the pressure balance point.

[0112] In one embodiment, such as Figure 7 As shown, the lower water jacket 1 is also provided with an auxiliary water inlet hole 19, through which the coolant entering the lower water jacket 1 merges with the third flow path.

[0113] By designing auxiliary water inlet holes 19 on the air intake side of the lower water jacket 1, a total of 8 holes are evenly arranged on the lower water jacket 1 in the transverse direction to uniformly supplement the cooling of the cylinder head and ensure the uniformity of cooling of each cylinder of the cylinder head.

[0114] In one embodiment, such as Figure 7 As shown, the first main water inlet 21, the second main water inlet 11, the secondary water inlet 17, and the auxiliary water inlet 19 are all exposed on the bottom surface of the cylinder head.

[0115] This invention also provides an engine that includes the engine water jacket structure provided in the above embodiments.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An engine water jacket structure, characterized in that, It includes an intake-side cooling chamber, an exhaust-side cooling chamber, a first connecting chamber, a second connecting chamber, a water inlet, and a water outlet; The intake-side cooling chamber is connected to the exhaust-side cooling chamber through the first connecting chamber and the second connecting chamber, respectively. The water inlet is connected to the intake-side cooling chamber and is located adjacent to the first connecting chamber. The water outlet is connected to the exhaust-side cooling chamber. A first flow-blocking element is provided in the first communicating chamber to form a first flow-blocking hole with a flow cross-sectional area smaller than that of the first communicating chamber. A second flow-blocking element is provided in the second communicating chamber to form a second flow-blocking hole with a flow cross-sectional area smaller than that of the second communicating chamber. The flow cross-sectional area of ​​the first flow-blocking orifice is smaller than that of the second flow-blocking orifice.

2. The engine water jacket structure according to claim 1, characterized in that, The water outlet is located near the second connecting chamber.

3. The engine water jacket structure according to claim 1, characterized in that, The engine water jacket structure also includes a cylinder water jacket, wherein the intake side cooling chamber, the exhaust side cooling chamber, the first connecting chamber, the second connecting chamber, the water inlet and the water outlet are respectively formed in the cylinder water jacket; one of the first connecting chamber and the second connecting chamber is located on the front side of the cylinder water jacket, and the other is located on the rear side of the cylinder water jacket.

4. The engine water jacket structure according to claim 3, characterized in that, The first flow-blocking component includes a first flow-blocking rib formed by the outer or inner side wall of the cylinder water jacket recessed into the first communicating cavity, and the first flow-blocking rib is integrally formed with the cylinder water jacket.

5. The engine water jacket structure according to claim 3, characterized in that, The second flow-blocking component includes a second flow-blocking rib formed by the outer or inner side wall of the cylinder water jacket recessed into the second communicating cavity, and the second flow-blocking rib is integrally formed with the cylinder water jacket.

6. The engine water jacket structure according to claim 3, characterized in that, The engine water jacket structure also includes multiple inter-cylinder connecting parts; The cylinder body water jacket encloses multiple cylinder areas, and at least one cylinder interconnector is provided between adjacent cylinder areas; Each of the cylinder communication components is provided with an inter-cylinder cooling channel, which is connected to the intake-side cooling chamber and the exhaust-side cooling chamber respectively.

7. The engine water jacket structure according to claim 3, characterized in that, The engine water jacket structure also includes a cylinder head water jacket, which includes an upper water jacket and a lower water jacket, with the lower water jacket located between the upper water jacket and the cylinder block water jacket. The upper water jacket is provided with a first main water inlet and a first drain outlet, and the lower water jacket is provided with a second main water inlet and a second drain outlet. The cylinder water jacket is provided with an upper main water inlet and a lower main water inlet. The upper main water inlet is connected to the first main water inlet, and the lower main water inlet is connected to the second main water inlet. Both the upper main water inlet and the lower main water inlet are located on the front side of the cylinder water jacket.

8. The engine water jacket structure according to claim 7, characterized in that, The upper water jacket is also provided with an upper cooling area for the exhaust duct and an outlet cooling area for the exhaust duct. The upper cooling area for the exhaust duct covers the upper part of each exhaust duct, and the outlet cooling area for the exhaust duct surrounds the outlet of each exhaust duct. A first flow path and a second flow path are formed between the first main inlet and the first outlet. The first flow path flows through the upper cooling area for the exhaust duct, and the second flow path flows through the outlet cooling area for the exhaust duct. The lower water jacket is also provided with a cooling area at the lower part of the exhaust channel, which covers the lower part of each exhaust channel. A third flow path is formed between the second main water inlet and the second water outlet, and the third flow path flows through the cooling area at the lower part of the exhaust channel. A first liquid flow channel and a second liquid flow channel are provided between the upper water jacket and the lower water jacket to allow communication between the two. The lower water jacket is also provided with a fourth flow path and a fifth flow path that are respectively connected to the second main water inlet. The fourth flow path is connected to the upper cooling area of ​​the exhaust duct through the first liquid flow channel, and the fifth flow path is connected to the outlet cooling area of ​​the exhaust duct through the second liquid flow channel.

9. The engine water jacket structure according to claim 8, characterized in that, A plurality of chambers are provided between the upper water jacket and the lower water jacket, through which exhaust channels can pass. Each of the chambers corresponds to an exhaust channel, and a cooling channel is formed between each pair of adjacent chambers. One end of one of the cooling channels is connected to the lower water jacket, and the second end is connected to the other cooling channels respectively.

10. The engine water jacket structure according to claim 8, characterized in that, The upper cooling area of ​​the exhaust duct is provided with a first guide plate at the position between each two adjacent upper exhaust ducts. Each first guide plate is formed with a guide hole extending along the upper arrangement direction of each exhaust duct. The coolant of the first flow path flows to the first drain outlet through each of the guide holes. The upper water jacket is also provided with a second guide plate extending from the upper cooling area of ​​the exhaust duct to the outlet cooling area of ​​the exhaust duct, and the coolant in the second flow path flows to the first exhaust cooling area through the second guide plate.

11. The engine water jacket structure according to claim 8, characterized in that, The lower water jacket is also provided with a nose bridge cooling area, which corresponds to the nose bridge area of ​​each exhaust channel. The nose bridge cooling area is provided with a nose bridge cooling channel with a nose bridge water inlet at the position of the nose bridge area of ​​each exhaust channel. The coolant entering the nose bridge cooling channel through the nose bridge water inlet can merge with the third flow path. Each cylinder water jacket has a nose bridge water inlet at the position corresponding to each cylinder, and each nose bridge water inlet is connected to the corresponding nose bridge water inlet.

12. The engine water jacket structure according to claim 11, characterized in that, Along the direction from near the front of the engine to near the rear of the engine, the area of ​​the plurality of nose bridge water inlets decreases sequentially.

13. The engine water jacket structure according to claim 12, characterized in that, The areas of the multiple nasal bridge water inlets decrease sequentially in a proportional manner.

14. The engine water jacket structure according to claim 11, characterized in that, The upper main water inlet is connected to the first connecting chamber between the first flow-blocking hole and the air intake cooling chamber, and the lower main water inlet is connected to the first connecting chamber between the first flow-blocking hole and the exhaust cooling chamber.

15. The engine water jacket structure according to claim 11, characterized in that, The lower water jacket is also provided with an auxiliary cooling area and a secondary water inlet. The auxiliary cooling area is located in the same position as the exhaust outlet cooling area. The nose bridge cooling area is located on the side of the lower exhaust cooling area facing the auxiliary cooling area, and the secondary water inlet is located on the side of the nose bridge cooling area facing the auxiliary cooling area. The coolant entering the lower water jacket through the secondary inlet flows through the auxiliary cooling area to the second outlet.

16. The engine water jacket structure according to claim 8, characterized in that, The lower water jacket is also provided with an auxiliary water inlet hole, through which the coolant entering the lower water jacket merges with the third flow path.

17. An engine, characterized in that, Includes the engine water jacket structure as described in any one of claims 1-16.

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