Cylinder cover lower-layer water jacket and engine
By optimizing the structural design of the lower water jacket of the cylinder head, including the water-dividing ridge and water-guiding ribs, the flow path of the coolant in the nose bridge area is improved, solving the problem in the existing technology that the coolant cannot effectively flow to the nose bridge area, achieving efficient cooling effects, and improving the overall performance and stability of the engine.
Patent Information
- Application Number
- CN202511019603.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2025-09-16
AI Technical Summary
The existing lower water jacket of the cylinder head cannot effectively guide the coolant to flow to the nose bridge area when the coolant flows, resulting in low coolant utilization efficiency, over-cooling of some areas and insufficient cooling of the critical nose bridge area, which is difficult to meet the needs of modern heavy-duty engines for efficient cooling of the cylinder head nose bridge area.
A lower cylinder head water jacket was designed, comprising the water jacket body, cylinder head water inlet, water guide ribs, water diversion ridges, lower cylinder head water inlet, nose bridge area, and a water jacket around the injector. By setting the water diversion ridge concave toward the nose bridge area in correspondence with the nose bridge area, and coordinating with the water guide ribs and throttling ridges, the coolant flow path was optimized, allowing the coolant to flow to the nose bridge area in a concentrated and efficient manner.
It improves the cooling effect of the nose bridge area, ensures uniform distribution of coolant, avoids over-cooling or under-cooling, improves the overall performance and reliability of the cooling system, and extends the service life of the engine.
Smart Images
Figure CN120650070A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of engines, and in particular to a cylinder head lower water jacket and an engine. Background Art
[0002] In the field of heavy-duty engines, as the degree of engine strengthening and specific power continue to increase, the heat generated by combustion in the cylinder has increasingly increased the thermal load on various areas of the cylinder head, especially the nose bridge area.
[0003] The existing lower water jacket of the cylinder head cannot effectively guide the coolant to flow to the nose bridge area when the coolant flows, resulting in low coolant utilization efficiency, over-cooling of some areas, and insufficient cooling of the critical nose bridge area. It is difficult to meet the requirements of modern heavy-duty engines for efficient cooling of the cylinder head nose bridge area. Summary of the Invention
[0004] The object of the present invention is to provide a cylinder head lower water jacket and an engine, which can improve the flow path of the coolant and ensure the cooling effect.
[0005] To achieve this object, the present invention adopts the following technical solutions:
[0006] Cylinder head lower water jacket, including:
[0007] The water jacket body is provided with a cylinder head water inlet, water guide ribs, water dividing ridges, a lower cylinder head water inlet, a nose bridge area and a water jacket around the injector;
[0008] In the left-right direction, the cylinder head water inlet and the lower cylinder head upper water inlet are respectively arranged on both sides of the water jacket body, the nose bridge area and the water jacket around the injector are both arranged in the middle of the water jacket body, and in the up-down direction, the water dividing ridge is arranged on the upper side of the water jacket body corresponding to the nose bridge area, and is recessed in the direction close to the nose bridge area, and the water guiding rib is arranged on the water jacket body corresponding to the cylinder head water inlet, and extends in the direction close to the upper side of the water jacket body.
[0009] As a further technical solution, the watershed ridge is arranged within 10 mm of the cylinder diameter, and the width of the watershed ridge is 1 / 8 to 1 / 6 of the cylinder diameter.
[0010] As a further technical solution, the watershed ridge is configured as an arc-shaped structure that is compatible with the interior of the cylinder head.
[0011] As a further technical solution, the projection of the water guide rib in the left-right direction covers the water inlet of the cylinder head.
[0012] As a further technical solution, the water guide rib is arranged within 10 mm of the cylinder diameter, and the width of the water guide rib is 1 / 5 to 1 / 4 of the cylinder diameter.
[0013] As a further technical solution, a throttling ridge is further provided on the water jacket body. The throttling ridge is provided on the upper side of the water jacket body corresponding to the water diversion ridge and is located downstream of the water diversion ridge.
[0014] As a further technical solution, the water inlet of the lower cylinder cover is arranged within 10 mm of the cylinder diameter, and the width of the water inlet of the lower cylinder cover is 1 / 10 to 1 / 7 of the cylinder diameter.
[0015] As a further technical solution, the distance between the water dividing ridge and the upper water inlet of the lower cylinder cover is 10 mm to 20 mm.
[0016] As a further technical solution, the thickness of the water jacket around the injector is less than or equal to 2 mm.
[0017] Engine, including cylinder head lower water jacket.
[0018] Beneficial effects of the present invention:
[0019] Since the watershed ridge is arranged on the upper side of the water jacket body corresponding to the nose bridge area and is recessed toward the nose bridge area, the watershed ridge can be set to change the flow direction of the coolant in the lower water jacket of the cylinder head, so that the coolant can flow to the nose bridge area in a concentrated and efficient manner, thereby improving the cooling effect of the nose bridge area. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.
[0021] Figure 1 is a top view of the lower water jacket of the cylinder head provided by an embodiment of the present invention;
[0022] Figure 2 It is a structural schematic diagram of the lower water jacket of the cylinder head provided by an embodiment of the present invention from another perspective.
[0023] In the picture:
[0024] 10. Water jacket body;
[0025] 100, cylinder head water inlet; 200, water guide rib; 300, water dividing ridge; 400, upper water inlet of lower cylinder head; 500, nose bridge area; 600, water jacket around injector; 700, throttle ridge. DETAILED DESCRIPTION
[0026] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.
[0027] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0028] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.
[0029] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.
[0030] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).
[0031] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.
[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.
[0033] Combine Figure 1 and Figure 2 As shown, the cylinder head lower water jacket provided in this embodiment can improve the coolant flow path and ensure cooling effect. Specifically, the cylinder head lower water jacket includes a water jacket body 10, which is provided with a cylinder head water inlet 100, water guide ribs 200, a water divider ridge 300, a lower cylinder head water inlet 400, a nose bridge area 500, and an injector surrounding water jacket 600. In the left-right direction, the cylinder head water inlet 100 and the lower cylinder head water inlet 400 are respectively provided on either side of the water jacket body 10, while the nose bridge area 500 and the injector surrounding water jacket 600 are both provided in the middle of the water jacket body 10. In the up-down direction, the water divider ridge 300 is provided on the upper side of the water jacket body 10 corresponding to the nose bridge area 500 and is recessed toward the nose bridge area 500. The water guide ribs 200 are provided on the water jacket body 10 corresponding to the cylinder head water inlet 100 and extend toward the upper side of the water jacket body 10. Since the watershed ridge 300 is arranged on the upper side of the water jacket body 10 corresponding to the nose bridge area 500, and is recessed toward the direction close to the nose bridge area 500; by setting the watershed ridge 300, the flow direction of the coolant in the lower water jacket of the cylinder head can be changed, so that the coolant can flow to the nose bridge area 500 in a concentrated and efficient manner, thereby improving the cooling effect of the nose bridge area 500.
[0034] Preferably, the watershed ridge 300 is located within 10 mm of the cylinder diameter, and its width is 1 / 8 to 1 / 6 of the cylinder diameter. This arrangement allows the watershed ridge 300 to more precisely distribute the coolant, ensuring that the coolant fully and evenly covers the nose bridge area 500. This prevents overcooling of certain areas while undercooling the critical nose bridge area 500, thereby improving the overall performance and reliability of the cooling system.
[0035] The lower water jacket of the cylinder head is applied on the cylinder head. Preferably, the water dividing ridge 300 is set to an arc structure that is compatible with the interior of the cylinder head. It can not only better guide the flow of the coolant and make it fit the shape of the interior of the cylinder head more closely, but also reduce the resistance and energy loss of the coolant during the flow process, thereby further improving the flow efficiency and cooling effect of the coolant.
[0036] Preferably, the projection of the water-guiding rib 200 in the left and right directions covers the cylinder head water inlet 100, which can effectively guide the flow of the coolant, so that the coolant can flow quickly and accurately along the predetermined path after entering the cylinder head water inlet 100, avoiding disorderly splashing and waste of the coolant, improving the utilization efficiency of the coolant, and ensuring that the coolant can fully cool key parts such as the nose bridge area 500.
[0037] Preferably, the water guide ribs 200 are located within 10 mm of the cylinder diameter, and their width is 1 / 5 to 1 / 4 of the cylinder diameter. These guide ribs 200 guide the coolant, allowing it to flow quickly and centrally toward the watershed ridge 300 and the nose bridge area 500, enhancing cooling capacity for the nose bridge area 500 while ensuring uniform distribution and efficient utilization of the coolant within the water jacket body 10.
[0038] Preferably, a throttle ridge 700 is further provided on the water jacket body 10. The throttle ridge 700 is provided on the upper side of the water jacket body 10 corresponding to the watershed ridge 300 and is located downstream of the watershed ridge 300. By providing the throttle ridge 700, the flow rate and flow velocity of the coolant can be controlled and adjusted, so that the coolant can maintain an appropriate flow velocity and pressure when flowing through the nose bridge area 500, further improving the cooling effect. At the same time, it also helps to optimize the flow field distribution within the entire cooling system, so that the coolant can cool all parts of the cylinder head more evenly.
[0039] In this embodiment, the lower cylinder head water inlet 400 is located within 10 mm of the cylinder diameter, and its width is 1 / 10 to 1 / 7 of the cylinder diameter. This arrangement allows the coolant to flow smoothly and quickly to other areas requiring cooling after cooling the nose bridge area 500, improving the coolant's circulation efficiency and ensuring efficient operation of the entire cooling system.
[0040] Preferably, the distance between the watershed ridge 300 and the lower cylinder head water inlet 400 is 10 mm to 20 mm. This ensures that after the coolant is diverted by the watershed ridge 300, there is sufficient space and time to fully cool the nose bridge area 500, while preventing the coolant from being excessively dispersed or concentrated in the flow direction. This ensures the proper flow and uniform distribution of the coolant within the water jacket body 10, thereby improving the overall performance of the cooling system.
[0041] Preferably, the thickness of the water jacket 600 surrounding the fuel injector is less than or equal to 2 mm. This configuration prevents excessive coolant from flowing directly from the lower cylinder head water jacket to the upper cylinder head water jacket, improving coolant utilization and enabling the coolant to better exert its cooling effect, thereby enhancing cooling efficiency.
[0042] like Figure 1 As shown, in this embodiment, after coolant enters the water jacket body 10 from the cylinder head water inlet 100, it flows along two flow paths, Path A and Path B. The coolant flowing along Path A, under the influence of the water divider ridge 300 and the throttling ridge 700, mostly flows toward the nose bridge area 500 opposite the water divider ridge 300, passes through the upper side of the injector surrounding water jacket 600, and ultimately flows to the lower cylinder head top nozzle 400. The coolant flowing along Path B, guided by the water guide rib 200, flows from the injector surrounding water jacket 600 through the nose bridge area 500 located below the injector surrounding water jacket 600, and ultimately flows to the lower cylinder head top nozzle 400. The coordination of Path A and Path B improves coolant utilization.
[0043] This embodiment also provides an engine, comprising a cylinder head lower water jacket. The engine utilizes the above-described cylinder head lower water jacket with an innovative structure, effectively improving the coolant flow path within the engine upper cylinder head, enhancing the cooling effect on the nose bridge area 500 , ensuring the reliability and stability of the engine when operating at high levels of reinforcement and high specific power, extending the engine's service life, and improving the overall performance and competitiveness of the engine.
[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. The lower water jacket of the cylinder head is characterized by: include: A water jacket body (10), wherein the water jacket body (10) is provided with a cylinder head water inlet (100), a water guide rib (200), a water dividing ridge (300), a lower cylinder head upper water inlet (400), a nose bridge area (500) and a water jacket (600) around the injector; In the left-right direction, the cylinder head water inlet (100) and the lower cylinder head upper water inlet (400) are respectively arranged on both sides of the water jacket body (10); the nose bridge area (500) and the injector surrounding water jacket (600) are both arranged in the middle of the water jacket body (10); in the up-down direction, the water dividing ridge (300) is arranged on the upper side of the water jacket body (10) corresponding to the nose bridge area (500) and is recessed in a direction close to the nose bridge area (500); the water guide rib (200) is arranged on the water jacket body (10) corresponding to the cylinder head water inlet (100) and extends in a direction close to the upper side of the water jacket body (10).
2. The cylinder head lower water jacket according to claim 1, characterized in that: The watershed ridge (300) is located within 10 mm of the cylinder diameter, and the width of the watershed ridge (300) is 1 / 8 to 1 / 6 of the cylinder diameter.
3. The cylinder head lower water jacket according to claim 1, characterized in that: The watershed ridge (300) is configured as an arc-shaped structure adapted to the interior of the cylinder head.
4. The cylinder head lower water jacket according to claim 1, characterized in that: The projection of the water guide rib (200) in the left-right direction covers the cylinder head water inlet (100).
5. The cylinder head lower water jacket according to claim 4, characterized in that: The water guide rib (200) is arranged within 10 mm of the cylinder diameter, and the width of the water guide rib (200) is 1 / 5 to 1 / 4 of the cylinder diameter.
6. The cylinder head lower water jacket according to claim 1, characterized in that: The water jacket body (10) is further provided with a throttling ridge (700), which is arranged on the upper side of the water jacket body (10) corresponding to the watershed ridge (300) and is located downstream of the watershed ridge (300).
7. The cylinder head lower water jacket according to claim 2, characterized in that: The water inlet (400) of the lower cylinder cover is arranged within 10 mm of the cylinder diameter, and the width of the water inlet (400) of the lower cylinder cover is 1 / 10 to 1 / 7 of the cylinder diameter.
8. The cylinder head lower water jacket according to claim 7, characterized in that: The distance between the water dividing ridge (300) and the upper water inlet (400) of the lower cylinder cover is 10 mm to 20 mm.
9. The cylinder head lower water jacket according to claim 1, characterized in that: The thickness of the water jacket (600) around the fuel injector is less than or equal to 2 mm.
10. An engine, characterized in that It comprises the cylinder head lower water jacket according to any one of claims 1 to 9.