Engine cylinder head cooling water chamber structure and cooling method

Abstract

The application belongs to the technical field of engines, and discloses an engine cylinder cover cooling water cavity structure and a cooling method. The engine cylinder cover cooling water cavity structure comprises a combustion chamber and a flow guide plate. The combustion chamber is provided with an oil injector hole. The combustion chamber is provided with two air inlets and two air outlets. A first water channel is arranged between the two air outlets. The first water channel is in communication with a first water cavity. A second water channel is arranged between adjacent air inlets and air outlets. The second water channel is in communication with the first water channel and a second water cavity. The flow guide plate is arranged in the combustion chamber. Cooling liquid enters the first water cavity through a water inlet, and then flows to the first water channel along the circumferential direction of the air outlet on the exhaust side under the action of the flow guide plate. The water flow of the cooling liquid is in a "V" shape. Finally, the cooling liquid flows through the second water channel and enters the second water cavity. The cooling liquid flow of the first water channel is strengthened, the flow rate of the cooling liquid is improved, the cooling reliability of the cylinder cover is enhanced, and the temperature of the cylinder cover is further reduced.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to the structure and cooling method of the cooling water chamber in the engine cylinder head. Background Technology

[0002] To ensure optimal fuel economy and compliance with emission standards, the engine needs to increase boost pressure, injection pressure, and optimize advance angle. However, these measures will increase engine power output and other indicators, significantly increasing the mechanical and thermal loads on engine components and placing higher demands on the cooling performance of the cylinder head.

[0003] The cylinder head, located at the top of the engine, is one of the most important engine components. Its main function is to seal the combustion gases in the cylinders, introduce fresh air into the cylinders, and expel the hot combustion gases. The cylinder head bears the mechanical load caused by gas forces and fastening bolts, and also experiences high thermal loads due to contact with hot combustion gases. To reduce the thermal load, a cooling structure is designed inside the cylinder head, focusing on cooling the high-temperature areas to meet reliability requirements. Traditional cylinder head cooling solutions typically involve coolant entering the lower water jacket of the cylinder head, then flowing from the lower jacket into the upper water jacket before exiting the engine. However, the bridge area between the two exhaust ports is a critical area for cylinder head cooling due to the combined effect of hot combustion gases and hot exhaust gases. Traditional solutions are insufficient in cooling this area, resulting in poor cylinder head reliability.

[0004] Therefore, there is an urgent need for engine cylinder head cooling water chamber structure and cooling method to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, the present invention provides a cooling water chamber structure for an engine cylinder head, which enhances the coolant flow, avoids cylinder head cracking, premature wear of valve seats, and other issues, and improves the cooling reliability of the cylinder head, further reducing the temperature of the cylinder head and improving the cooling performance of the cylinder head.

[0006] To address the aforementioned problems in the existing technology, the present invention adopts the following technical solution:

[0007] An engine cylinder head cooling water chamber structure includes a first water chamber and a second water chamber. The first water chamber is located below the second water chamber and is connected to the second water chamber through a connecting hole. The first water chamber has a water inlet on the intake side of the cylinder head, and the second water chamber has a water outlet on the exhaust side of the cylinder head. The engine cylinder head cooling water chamber structure includes:

[0008] The combustion chamber is provided with injector holes. Along the circumferential direction of the injector holes, the combustion chamber is provided with two air inlets and two exhaust ports. A first water channel is provided between the two exhaust ports and is connected to a first water chamber. A second water channel is provided between adjacent air inlets and exhaust ports and is connected to the first water channel. The second water channel is also connected to a second water chamber through a connecting hole.

[0009] A guide vane is disposed in the combustion chamber and located at the water inlet. The guide vane is used to guide the coolant in the first water chamber to flow along the circumferential direction of the exhaust port to the first water channel.

[0010] Preferably, the engine cylinder head cooling water chamber structure further includes a partition plate, which is located between the first water chamber and the second water chamber, and the partition plate is spaced apart from the exhaust side to form the connecting hole.

[0011] Preferably, a first connecting water channel is provided around the circumference of the exhaust port, and the first water cavity is connected to the first water channel through the first connecting water channel.

[0012] Preferably, a third water channel is provided between adjacent air inlets and exhaust outlets. The third water channel is spaced apart from the first connecting water channel. The water inlet of the third water channel is connected to the first water cavity, and the water outlet of the third water channel is connected to the second water channel.

[0013] Preferably, a central channel is provided around the periphery of the injector hole along the circumferential direction, and the second channel and the third channel are connected through the central channel.

[0014] Preferably, a fourth water channel is provided between the two air inlets, the outlet of the fourth water channel is connected to the second water channel through the middle water channel, and the inlet of the fourth water channel is connected to the first water cavity.

[0015] Preferably, along the circumferential direction of the air inlet, a second connecting water channel is provided around the periphery of the air inlet, the second connecting water channel and the third water channel are spaced apart, and the first water cavity is connected to the fourth water channel through the second connecting water channel.

[0016] Preferably, there are multiple combustion chambers, which are evenly distributed along a first direction, and multiple second water channels are all connected to the water outlet on the exhaust side.

[0017] According to another aspect of the present invention, an engine cylinder head cooling method is provided, wherein, through the implementation of the above-described engine cylinder head cooling water chamber structure, the engine cylinder head cooling method includes:

[0018] S100: Coolant enters the first water chamber through the water inlet on the air intake side;

[0019] S200: The coolant in the first water chamber flows to the first water channel through the guide plate along the circumferential direction of the exhaust port, and then the coolant in the first water channel flows to the second water channel.

[0020] S300: The coolant in the second water channel enters the second water chamber through the connecting hole;

[0021] S400: The coolant in the second water chamber is collected and flows out of the cylinder head through the outlet on the exhaust side.

[0022] Preferably, a third water channel is provided between adjacent air inlets and air outlets, the water inlet of the third water channel is connected to the first water cavity, the water outlet of the third water channel is connected to the second water channel, and a fourth water channel is provided between the two air inlets, the water outlet of the fourth water channel is connected to the second water channel, and the water inlet of the fourth water channel is connected to the first water cavity.

[0023] The engine cylinder head cooling method also includes the section between S200 and S300:

[0024] S210: A portion of the coolant in the first water chamber flows to the first water channel, and another portion of the coolant in the first water chamber flows to the third water channel and the fourth water channel.

[0025] S220: The coolant in the third water channel flows through the periphery of the injector hole to the second water channel, and the coolant in the fourth water channel flows through the periphery of the injector hole to the second water channel.

[0026] S230: The coolant from the first water channel, the third water channel, and the fourth water channel converges and flows into the second water channel.

[0027] The beneficial effects of this invention are as follows:

[0028] The engine cylinder head cooling water chamber structure provided by this invention has a water inlet at the bottom of the cylinder head. The coolant flows from bottom to top in the cylinder head, which is consistent with the direction of air bubble movement in the coolant. This facilitates air bubble removal and prevents air bubbles from accumulating in the coolant and hindering heat transfer in the cylinder head. The combustion chamber has injector holes, two air inlets, and two exhaust outlets. A first water channel is provided between the two exhaust outlets, and a second water channel is provided between adjacent air inlets and exhaust outlets. A guide plate is located in the combustion chamber at the water inlet. The coolant enters the first water chamber through the water inlet in the cylinder head, then flows to the exhaust side through the guide plate. Under the action of the guide plate, the coolant is guided to the exhaust side and flows along the circumference of the exhaust outlet to the first water channel. The coolant flow is "V" shaped, and finally flows through the second water channel and enters the second water chamber through a connecting hole. After being collected in the second water chamber, the coolant flows out from the outlet on the exhaust side. The coolant flow rate of the first water passage is enhanced, the coolant flow rate is increased, and cracking of the first and second water passages of the cylinder head and premature wear of the valve seat rings are avoided. This enhances the cooling reliability of the cylinder head, further reduces the temperature of the cylinder head, and improves the cooling performance of the cylinder head.

[0029] The engine cylinder head cooling method provided by this invention, through the implementation of the aforementioned engine cylinder head cooling water chamber structure, involves coolant entering the first water chamber through the intake port on the intake side. The coolant in the first water chamber flows along the circumference of the exhaust port to the first water channel via a guide plate. Then, the coolant in the first water channel flows to the second water channel, and the coolant in the second water channel enters the second water chamber through a connecting hole. The coolant in the second water chamber collects and flows out of the cylinder head through the exhaust port. The coolant flow is "V"-shaped, enhancing the coolant flow rate in the first water channel, increasing the coolant velocity, preventing cylinder head cracking, premature valve seat wear, and other issues, thus improving the cooling reliability of the cylinder head. The coolant also provides enhanced cooling to the second water channel, reducing the cylinder head temperature and resulting in good cooling performance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the engine cylinder head cooling water chamber structure in an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional schematic diagram of the engine cylinder head cooling water chamber structure in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the coolant flow field in the engine cylinder head cooling water chamber structure in an embodiment of the present invention. Figure 1 ;

[0033] Figure 4 This is a schematic diagram of the coolant flow field in the engine cylinder head cooling water chamber structure in an embodiment of the present invention. Figure 2 ;

[0034] Figure 5 This is a cross-sectional schematic diagram of the coolant flow field in the engine cylinder head cooling water chamber structure in an embodiment of the present invention;

[0035] Figure 6 This is a flowchart illustrating the overall coolant flow in the engine cylinder head cooling water chamber structure according to an embodiment of the present invention.

[0036] Figure 7 This is a flowchart of an engine cylinder head cooling method in an embodiment of the present invention.

[0037] Figure label:

[0038] 1. First water chamber; 2. Second water chamber; 3. Connecting hole; 4. Air intake side; 5. Water inlet; 6. Exhaust side; 7. Water outlet; 8. Injector hole; 9. Air inlet; 10. Exhaust outlet; 11. First water channel; 12. Second water channel; 13. Baffle plate; 14. Middle partition plate; 15. First connecting water channel; 16. Third water channel; 17. Intermediate water channel; 18. Fourth water channel; 19. Second connecting water channel. Detailed Implementation

[0039] The present invention will now be described in further detail 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 not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0043] To reduce heat load, a cooling structure is designed within the cylinder head, focusing on cooling the high-temperature areas of the cylinder head to meet reliability requirements. Traditional cylinder head cooling systems typically involve coolant entering the lower water jacket of the cylinder head, then flowing from the lower jacket into the upper water jacket before exiting the engine. However, the nose area between the two exhaust ports is a critical area for cylinder head cooling due to the combined effect of high-temperature combustion gases and exhaust gases. Traditional solutions provide insufficient cooling performance in this area, resulting in poor cylinder head reliability. To address this, this embodiment provides an engine cylinder head cooling water chamber structure that enhances coolant flow, prevents cylinder head cracking and premature valve seat wear, improves cylinder head cooling reliability, further reduces cylinder head temperature, and enhances cylinder head cooling performance.

[0044] like Figures 1-6As shown, in this embodiment, the engine cylinder head cooling water chamber structure has a first water chamber 1 and a second water chamber 2. The first water chamber 1 is located below the second water chamber 2 and is connected to the second water chamber 2 through a connecting hole 3. The first water chamber 1 has a water inlet 5 located on the intake side 4 of the cylinder head, and the second water chamber 2 has a water outlet 7 located on the exhaust side 6 of the cylinder head. The engine cylinder head cooling water chamber structure includes a combustion chamber and a baffle plate 13. The combustion chamber is provided with injector holes 8. Along the circumferential direction of the injector holes 8, the combustion chamber is provided with two intake ports 9 and two exhaust ports 10. A first water channel 11 is provided between the two exhaust ports 10 and is connected to the first water chamber 1. A second water channel 12 is provided between adjacent intake ports 9 and exhaust ports 10 and is connected to the first water channel 11. The second water channel 12 is connected to the second water chamber 2 through a connecting hole 3. A deflector 13 is disposed in the combustion chamber and located at the water inlet 5. The deflector 13 guides the coolant in the first water chamber 1 to flow along the circumference of the exhaust port 10 to the first water passage 11. Specifically, the cooling water chamber structure of the cylinder head is generally divided into a lower layer with a first water chamber 1 and an upper layer with a second water chamber 2. A cast injector hole 8 is arranged in the center. The left side of the cylinder head is the intake side 4, and the right side is the exhaust side 6. The first water chamber 1 and the second water chamber 2 are connected by a connecting hole 3 located on the exhaust side 6. During engine operation, the coolant generates a certain number of bubbles through heating and agitation. The movement trend of the bubbles in the coolant is always from bottom to top. A coolant inlet 5 located on the intake side 4 is provided at the bottom of the cylinder head. The flow trend of the coolant in the cylinder head is from bottom to top, which is consistent with the movement trend of the bubbles in the coolant. This facilitates the removal of bubbles and prevents the bubbles in the coolant from locally accumulating into cavities that would hinder the heat transfer of the cylinder head. The second water chamber 2 is provided with an intake valve guide hole and an exhaust valve guide hole. The exhaust valve guide hole is the key area for cooling of the upper water jacket. The coolant in the second water chamber 2 enters from the exhaust side 6. After the coolant is collected in the second water chamber 2, it flows to the front end and flows out of the cylinder head.

[0045] The bottom of the cylinder head has four air intakes, forming a rhombus shape when connected by their centers. These include two intake ports (9) and two exhaust ports (10). A first water channel (11) is located between the two exhaust ports (10), and a second water channel (12) is located between adjacent intake and exhaust ports (9 and 10). The first water channel (11) is heated by the combined combustion and exhaust gases, making it a key area for cylinder head cooling. Coolant enters the first water chamber (1) through the cylinder head's inlet (5) and then flows to the exhaust side (6) via a guide plate (13). Guided by the guide plate (13), the coolant flows along the circumference of the exhaust ports (10) towards the first water channel (11), creating a "V"-shaped flow pattern. This enhances the coolant flow rate in the first water channel (11), increases the coolant velocity, and prevents cracking of the first and second water channels (11 and 12) and premature wear of the valve seats, thus improving the cooling reliability of the cylinder head. Finally, the coolant flows through the second water channel 12 and enters the second water chamber 2 through the connecting hole 3. After being collected in the second water chamber 2, the coolant flows out from the outlet 7 on the exhaust side 6. The coolant enhances the cooling of the second water channel 12, reduces the temperature of the cylinder head, and improves the cooling performance of the cylinder head.

[0046] Furthermore, continue to refer to Figures 1-6 The engine cylinder head cooling water chamber structure also includes a partition plate 14, which is located between the first water chamber 1 and the second water chamber 2, and is spaced apart from the exhaust side 6 to form a connecting hole 3. Specifically, the cylinder head cooling water chamber structure has a partition plate 14 in the middle, and the first water chamber 1 and the second water chamber 2 are connected through the connecting hole 3. While separating the first water chamber 1 and the second water chamber 2, the partition plate 14 can also connect the cylinder head bolts, intake and exhaust passages, and intake and exhaust side 6 plates. The partition plate 14 has the function of improving the rigidity and strength of the cylinder head, reducing the overall deformation of the cylinder head, and improving the reliability of the cylinder head.

[0047] Furthermore, continue to refer to Figures 1-6 Along the circumference of the exhaust port 10, a first connecting water channel 15 is provided around the periphery of the exhaust port 10. The first water chamber 1 is connected to the first water channel 11 through the first connecting water channel 15. Specifically, the coolant enters the first water chamber 1 through the inlet 5, and then flows to the exhaust side 6 under the action of the guide plate 13. After being guided to the exhaust side 6, the coolant flows through the first connecting water channel 15 to the first water channel 11. The coolant flow is "V" shaped, which enhances the coolant flow rate of the first water channel 11, increases the coolant flow velocity, avoids cracking at the first water channel 11 of the cylinder head, and enhances the reliability of the cylinder head.

[0048] Furthermore, continue to refer to Figures 1-6A third water channel 16 is provided between adjacent air inlets 9 and exhaust outlets 10. The third water channel 16 is spaced apart from the first connecting water channel 15. A middle water channel 17 is provided around the periphery of the injector hole 8 along the circumferential direction of the injector hole 8. The water inlet of the third water channel 16 is connected to the first water chamber 1, and the water outlet of the third water channel 16 is connected to the second water channel 12 through the middle water channel 17. A fourth water channel 18 is provided between the two air inlets 9. The water outlet of the fourth water channel 18 is connected to the second water channel 12 through the middle water channel 17. A second connecting water channel 19 is provided around the periphery of the air inlet 9 along the circumferential direction of the air inlet 9. The second connecting water channel 19 is spaced apart from the third water channel 16, and the water inlet of the fourth water channel 18 is connected to the first water chamber 1 through the second connecting water channel 19. Specifically, the coolant enters the first water chamber 1 through the inlet 5. Then, under the action of the guide plate 13, part of the coolant flows into the second water chamber 12 through the first connecting water channel 15 and the intermediate water channel 17, and another part of the coolant flows into the second water chamber 12 through the third water channel 16 and the intermediate water channel 17, as well as through the second connecting water channel 19, the fourth water channel 18 and the intermediate water channel 17, to satisfy the cooling of the third water channel 16 and the fourth water channel 18. The coolant collected in the second water chamber 12 flows into the second water chamber 2 through the connecting hole 3, and finally flows out of the cylinder head through the outlet 7, so that the coolant water flow utilization efficiency is optimized.

[0049] Furthermore, continue to refer to Figures 1-6 There are multiple combustion chambers, evenly distributed along a first direction, and multiple second water channels 12 are all connected to the outlet 7 of the exhaust side 6. Specifically, the second water chambers 2 of the multiple combustion chambers are interconnected to form a single channel, collecting the coolant from each cylinder and flowing towards the front end of the cylinder head. The second water chamber 2 of the cylinder head has longitudinal flow, serving as a cooling channel and a return water passage for the cylinder head. In addition to its cooling effect, the second water chamber 2 also collects the coolant from each cylinder, and the coolant flows out of the cylinder head through the outlet 7 at the front end of the second water chamber 2.

[0050] This embodiment also provides a method for cooling the engine cylinder head, such as... Figure 7 As shown, through the implementation of the above-described engine cylinder head cooling water chamber structure, the engine cylinder head cooling method includes:

[0051] S100: Coolant enters the first water chamber 1 through the water inlet 5 on the air intake side 4.

[0052] Specifically, the cylinder head cooling water chamber structure is generally divided into a first water chamber 1 and a second water chamber 2. The first water chamber 1 is located below the second water chamber 2. The left side of the cylinder head is the intake side 4, and the right side of the cylinder head is the exhaust side 6. The first water chamber 1 and the second water chamber 2 are connected through a connecting hole 3 located on the exhaust side 6. A coolant inlet 5 is provided at the bottom of the cylinder head on the intake side 4. The inlet 5 is connected to the first water chamber 1, and the engine coolant flows into the first water chamber 1 through the inlet 5.

[0053] S200: The coolant in the first water chamber 1 flows through the guide plate 13 along the circumferential direction of the exhaust port 10 to the first water channel 11, and then the coolant in the first water channel 11 flows to the second water channel 12.

[0054] Specifically, the baffle 13 is disposed in the combustion chamber and located at the water inlet 5. Along the circumference of the exhaust port 10, a first connecting water channel 15 is provided around the periphery of the exhaust port 10. The first water chamber 1 is connected to the first water channel 11 via the first connecting water channel 15. Coolant enters the first water chamber 1 through the water inlet 5, and then flows towards the exhaust side 6 under the action of the baffle 13. After being guided to the exhaust side 6, it flows through the first connecting water channel 15 to the first water channel 11. The coolant flow is "V"-shaped, enhancing the coolant flow rate in the first water channel 11, increasing the coolant velocity, preventing cracking at the first water channel 11 of the cylinder head, and enhancing the reliability of the cylinder head. Then, the coolant in the first water channel 11 flows to the second water channel 12 via the first connecting water channel 15.

[0055] S210: Part of the coolant in the first water chamber 1 flows to the first water channel 11, and the other part of the coolant in the first water chamber 1 flows to the third water channel 16 and the fourth water channel 18.

[0056] S220: The coolant in the third channel 16 flows through the periphery of the injector hole 8 to the second channel 12, and the coolant in the fourth channel 18 flows through the periphery of the injector hole 8 to the second channel 12.

[0057] S230: The coolant from the first water channel 11, the third water channel 16 and the fourth water channel 18 converges and flows to the second water channel 12.

[0058] Specifically, a third water channel 16 is provided between adjacent air inlets 9 and exhaust outlets 10. The third water channel 16 is spaced apart from the first connecting water channel 15. Along the circumferential direction of the injector hole 8, a middle water channel 17 is provided around the periphery of the injector hole 8. The water inlet of the third water channel 16 is connected to the first water chamber 1, and the water outlet of the third water channel 16 is connected to the second water channel 12 through the middle water channel 17. A fourth water channel 18 is provided between the two air inlets 9. The water outlet of the fourth water channel 18 is connected to the second water channel 12 through the middle water channel 17. Along the circumferential direction of the air inlet 9, a second connecting water channel 19 is provided around the periphery of the air inlet 9. The second connecting water channel 19 is spaced apart from the third water channel 16, and the water inlet of the fourth water channel 18 is connected to the first water chamber 1 through the second connecting water channel 19.

[0059] Coolant enters the first water chamber 1 through the inlet 5. Then, under the action of the guide plate 13, part of the coolant flows into the second water chamber 12 through the first connecting water channel 15 and the intermediate water channel 17, and another part of the coolant flows into the second water chamber 12 through the third water channel 16 and the intermediate water channel 17, as well as through the second connecting water channel 19, the fourth water channel 18 and the intermediate water channel 17, to meet the cooling needs of the third water channel 16 and the fourth water channel 18. The coolant collected in the second water chamber 12 flows into the second water chamber 2 through the connecting hole 3, and finally flows out of the cylinder head through the outlet 7, thus optimizing the coolant flow efficiency.

[0060] S300: The coolant in the second water channel 12 enters the second water chamber 2 through the connecting hole 3.

[0061] Specifically, a central partition 14 is provided in the middle of the cylinder head cooling water chamber structure. The central partition 14 is spaced apart from the exhaust side 6 to form a connecting hole 3. The first water chamber 1 and the second water chamber 2 are connected through the connecting hole 3. The second water channel 12 carries the coolant collected by the first water channel 11, the third water channel 16 and the fourth water channel 18 into the second water chamber 2 through the connecting hole 3.

[0062] S400: The coolant in the second water chamber 2 is collected and flows out of the cylinder head through the outlet 7 on the exhaust side 6.

[0063] Specifically, the coolant collected in the second water channel 12 flows into the second water chamber 2 through the connecting hole 3, and finally flows out of the cylinder head through the outlet 7, thereby optimizing the coolant flow efficiency.

[0064] The engine cylinder head cooling method provided in this embodiment, through the implementation of the aforementioned engine cylinder head cooling water chamber structure, allows coolant to enter the first water chamber 1 through the inlet 5 on the intake side 4. The coolant in the first water chamber 1 flows along the circumference of the exhaust port 10 to the first water channel 11 via the guide plate 13. Then, the coolant in the first water channel 11 flows to the second water channel 12. The coolant in the second water channel 12 enters the second water chamber 2 through the connecting hole 3. The coolant in the second water chamber 2 collects and flows out of the cylinder head through the outlet 7 on the exhaust side 6. The coolant flow is "V"-shaped, enhancing the coolant flow rate in the first water channel 11, increasing the coolant velocity, preventing cylinder head cracking, premature valve seat wear, and other issues, thus enhancing the cooling reliability of the cylinder head. The coolant also provides enhanced cooling to the second water channel 12, reducing the cylinder head temperature and resulting in good cooling performance.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An engine cylinder head cooling water chamber structure, comprising a first water chamber (1) and a second water chamber (2), wherein the first water chamber (1) is located below the second water chamber (2), and the first water chamber (1) is connected to the second water chamber (2) through a connecting hole (3), the first water chamber (1) having a water inlet (5) located on the intake side (4) of the cylinder head, and the second water chamber (2) having a water outlet (7) located on the exhaust side (6) of the cylinder head, characterized in that, The engine cylinder head cooling water chamber structure includes: The combustion chamber is provided with an injector hole (8). Along the circumferential direction of the injector hole (8), the combustion chamber is provided with two air inlets (9) and two exhaust ports (10). A first water channel (11) is provided between the two exhaust ports (10). The first water channel (11) is connected to the first water chamber (1). A second water channel (12) is provided between adjacent air inlets (9) and exhaust ports (10). The second water channel (12) is connected to the first water channel (11). The second water channel (12) is connected to the second water chamber (2) through the connecting hole (3). A guide plate (13) is disposed in the combustion chamber and located at the water inlet (5). The guide plate (13) is used to guide the coolant of the first water chamber (1) to flow along the circumferential direction of the exhaust port (10) to the first water channel (11). A third water channel (16) is provided between the adjacent air inlet (9) and the exhaust outlet (10). The water inlet end of the third water channel (16) is connected to the first water chamber (1), and the water outlet end of the third water channel (16) is connected to the second water channel (12). Along the circumferential direction of the injector hole (8), a middle water channel (17) is provided on the periphery of the injector hole (8), and the second water channel (12) and the third water channel (16) are connected through the middle water channel (17). A fourth water channel (18) is provided between the two air inlets (9). The water outlet of the fourth water channel (18) is connected to the second water channel (12) through the middle water channel (17), and the water inlet of the fourth water channel (18) is connected to the first water chamber (1).

2. The engine cylinder head cooling water chamber structure according to claim 1, characterized in that, The engine cylinder head cooling water chamber structure also includes a partition plate (14), which is located between the first water chamber (1) and the second water chamber (2), and the partition plate (14) is spaced apart from the exhaust side (6) to form the connecting hole (3).

3. The engine cylinder head cooling water chamber structure according to claim 1, characterized in that, Along the circumferential direction of the exhaust port (10), a first connecting water channel (15) is provided around the periphery of the exhaust port (10), and the first water cavity (1) is connected to the first water channel (11) through the first connecting water channel (15).

4. The engine cylinder head cooling water chamber structure according to claim 3, characterized in that, The third waterway (16) is spaced apart from the first connecting waterway (15).

5. The engine cylinder head cooling water chamber structure according to claim 1, characterized in that, Along the circumferential direction of the air inlet (9), a second connecting water channel (19) is provided around the periphery of the air inlet (9). The second connecting water channel (19) is spaced apart from the third water channel (16). The first water cavity (1) is connected to the fourth water channel (18) through the second connecting water channel (19).

6. The engine cylinder head cooling water chamber structure according to claim 1, characterized in that, There are multiple combustion chambers, which are evenly distributed along the first direction, and multiple second water channels (12) are all connected to the outlet (7) of the exhaust side (6).

7. A method for cooling an engine cylinder head, characterized in that, By implementing the engine cylinder head cooling water chamber structure according to any one of claims 1-6, the engine cylinder head cooling method includes: S100: Coolant enters the first water chamber (1) through the water inlet (5) of the air intake side (4); S200: The coolant in the first water chamber (1) flows through the guide plate (13) along the circumferential direction of the exhaust port (10) to the first water channel (11), and then the coolant in the first water channel (11) flows to the second water channel (12). S300: The coolant in the second water channel (12) enters the second water chamber (2) through the connecting hole (3); S400: The coolant in the second water chamber (2) is collected and flows out of the cylinder head through the outlet (7) of the exhaust side (6).

8. The engine cylinder head cooling method according to claim 7, characterized in that, A third water channel (16) is provided between adjacent air inlets (9) and exhaust outlets (10). The water inlet of the third water channel (16) is connected to the first water chamber (1), and the water outlet of the third water channel (16) is connected to the second water channel (12). A fourth water channel (18) is provided between the two air inlets (9). The water outlet of the fourth water channel (18) is connected to the second water channel (12), and the water inlet of the fourth water channel (18) is connected to the first water chamber (1). The engine cylinder head cooling method also includes the section between S200 and S300: S210: A portion of the coolant in the first water chamber (1) flows to the first water channel (11), and another portion of the coolant in the first water chamber (1) flows to the third water channel (16) and the fourth water channel (18). S220: The coolant in the third channel (16) flows through the periphery of the injector hole (8) to the second channel (12), and the coolant in the fourth channel (18) flows through the periphery of the injector hole (8) to the second channel (12). S230: The coolant in the first water channel (11), the third water channel (16) and the fourth water channel (18) converges and flows to the second water channel (12).

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