Cylinder cover water jacket structure and vehicle
By forming an upper and lower water jacket on the cylinder head body and opening sink grooves on the outer wall to embed thermostats, the problem of large space occupied by the thermostats is solved, and the compactness and cooling performance of the engine are improved.
Patent Information
- Application Number
- CN202422636022.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the prior art, the thermostat takes up a large space, resulting in a less compact engine arrangement.
The upper and lower water jackets are formed on the cylinder head body, and a sinking groove is opened on the outer wall to communicate with the water outlet. The thermostat is embedded in the sinking groove to reduce the space occupied.
By reasonably distributing the cooling water flow, the cooling performance of the cylinder head is improved, and the thermostat is embedded in the sinking groove to reduce the space and improve the overall compactness of the engine.
Smart Images
Figure CN223136278U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicles, and more specifically relates to a cylinder head water jacket structure and a vehicle. Background Art
[0002] The cylinder head is a component of the engine. It forms a combustion chamber with the cylinder body and provides support and installation structure for the valve train and ignition system. There is a cylinder head water jacket in the cylinder head. There is antifreeze in the cylinder head water jacket. During the operation of the engine, the antifreeze flows in a certain form to take away the heat of the cylinder head.
[0003] In the prior art, the cylinder head water jacket is generally a double-layer water jacket, and each layer of the water jacket has a water outlet. The thermostat, as a switching mechanism for the large and small cycles of the engine cooling system, is generally arranged at the water outlet of the cylinder head water jacket. Limited by the double-layer water jacket structure, the thermostat is directly fixed on the outer wall of the cylinder head, and the thermostat occupies a large space, resulting in a non-compact engine layout. Utility Model Content
[0004] The utility model aims to provide a cylinder head water jacket structure and a vehicle, aiming to solve the technical problems existing in the prior art that the thermostat occupies a large space and the engine layout is not compact.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a cylinder head water jacket structure, including:
[0006] A cylinder head body; an upper water jacket and a lower water jacket are formed on the cylinder head body; the upper water jacket has a first water outlet, and the lower water jacket has a second water outlet; the outer wall surface of the cylinder head body has a mounting surface, and a sinking groove is formed on the mounting surface, and the sinking groove is connected to the first water outlet and the second water outlet respectively; and
[0007] The thermostat is fixedly connected to the mounting surface, and one end of the thermostat is embedded in the sinking groove.
[0008] In a possible implementation, the mounting surface is located at a front end portion of the intake side of the cylinder head body.
[0009] In some embodiments, an overflow hole is formed on the cylinder head body, and the overflow hole is communicated with the sinking groove.
[0010] In a possible implementation, the outer wall surface of the intake side of the cylinder head body is used as a reference surface, the mounting surface is inclined relative to the reference surface, and the mounting surface is inclined from bottom to top toward a direction close to the reference surface.
[0011] In some embodiments, the axial direction of the first water outlet and the axial direction of the second water outlet are both perpendicular to the mounting surface.
[0012] In a possible implementation, the upper water jacket and the lower water jacket are isolated by an intermediate partition, and the intermediate partition is provided with a communication hole.
[0013] In some embodiments, a notch is provided at an end of the intermediate partition, and the notch communicates with the first water outlet, the second water outlet, and the sinking groove.
[0014] In some embodiments, the notch has an arc-shaped outward expansion portion extending toward the first water outlet and the second water outlet.
[0015] In some embodiments, the center line of the end face of the intermediate partition coincides with the radial center line of the bottom wall of the sinking groove.
[0016] The beneficial effect of the cylinder head water jacket structure provided by the present utility model lies in that: compared with the prior art, the cylinder head water jacket structure of the present utility model forms an upper water jacket and a lower water jacket on the cylinder head body, reasonably distributes the cooling water flow, and can fully cool the cylinder head body; a sinking groove communicating with the first water outlet and the second water outlet is opened on the cylinder head body, and the sinking groove provides an installation space for assembling a thermostat, so that the end portion of the thermostat can be partially embedded in the sinking groove, thereby reducing the occupied space and installation height of the thermostat and improving the overall compactness of the engine.
[0017] The present utility model also provides a vehicle, including the above-mentioned cylinder head water jacket structure.
[0018] For the vehicle provided by the present utility model, due to the adoption of the above-mentioned cylinder head water jacket structure, the thermostat can be partially embedded in the lower layer groove of the cylinder head body, reducing the occupied space and installation height of the thermostat and improving the compactness of the engine. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0020] Figure 1 It is a schematic structural diagram of the cylinder head water jacket structure provided by the embodiment of the present utility model;
[0021] Figure 2 For Figure 1 the sectional view taken along the line A-A in
[0022] Figure 3 It is a partial structural schematic diagram at the installation surface of the cylinder head water jacket structure provided by the embodiment of the present utility model;
[0023] Figure 4 is a sectional view along line B - B in Figure 3 ;
[0024] Figure 5 is Figure 2 an enlarged schematic view of the structure at circle C in
[0025] In the figure:
[0026] 1. Cylinder head body; 11. Mounting surface; 12. Sinking groove; 13. Intake side; 14. Exhaust side; 15. Overflow hole; 16. Intermediate partition; 17. Notch; 171. Arc - shaped outward - expanding part; 172. Strip - shaped part;
[0027] 2. Upper water jacket; 21. First water outlet;
[0028] 3. Lower water jacket; 31. Second water outlet;
[0029] 4. Thermostat. Specific embodiments
[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model 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 only used to explain the present utility model and are not used to limit the present utility model.
[0031] It should be noted that the orientation or positional relationship indicated by "front", "rear", "inner", "outer", "upper", "lower", etc. in this embodiment is based on the orientation of the vehicle itself. Among them, the vehicle head represents "front", the vehicle tail represents "rear", the vehicle top represents "upper", the vehicle bottom represents "lower", the "inner" side refers to the side facing the driver's cab, and the "outer" side refers to the side facing the outside of the driver's cab.
[0032] In addition, the front - rear direction of the vehicle body defined in the embodiments of the present utility model refers to the front - rear direction in the forward direction during the vehicle driving process, the left - right direction of the vehicle body refers to the left - right direction in the forward direction during the vehicle driving process, and the up - down direction of the vehicle body refers to the up - down direction in the forward direction during the vehicle driving process.
[0033] Please refer to Figures 1 to 4, the cylinder head water jacket structure provided by the present utility model will now be described. The cylinder head water jacket structure includes a cylinder head body 1 and a thermostat 4. An upper water jacket 2 and a lower water jacket 3 are formed on the cylinder head body 1; the upper water jacket 2 has a first water outlet 21, and the lower water jacket 3 has a second water outlet 31; an outer wall surface of the cylinder head body 1 has a mounting surface 11, and a sinking groove 12 is formed on the mounting surface 11, and the sinking groove 12 communicates with the first water outlet 21 and the second water outlet 31 respectively; the thermostat 4 is fixedly connected to the mounting surface 11, and one end is embedded in the sinking groove 12.
[0034] An upper water jacket 2 and a lower water jacket 3 are formed on the cylinder head body 1, and the upper water jacket 2 and the lower water jacket 3 can be communicated through a communication hole formed in the cylinder head body 1. The water inlets of the upper water jacket 2 and the lower water jacket 3 are vertically corresponding, and the first water outlet 21 and the second water outlet 31 are vertically corresponding. It should be noted that the "upper" and "lower" here are based on the direction after the cylinder head body 1 is assembled. The cylinder head body 1 is assembled to the top surface of the cylinder block, and the cylinder head cover is assembled to the top surface of the cylinder head body 1.
[0035] The upper water jacket 2 and the lower water jacket 3 are formed on the cylinder head body 1, and the cooling water flow is reasonably distributed, so that the cylinder head body 1 with a high heat load can be fully cooled, and the cooling performance of the area with high cooling requirements can be better controlled, thereby improving the cooling performance of the cylinder head body 1 and enhancing its reliability.
[0036] A part of the outer wall surface of the cylinder head body 1 forms a mounting surface 11, and the thermostat 4 is directly fixed on the mounting surface 11. Usually, bolts are used to fix the housing of the thermostat 4 on the mounting surface 11, as Figure 2 shown.
[0037] In addition, a sinking groove 12 is formed on the mounting surface 11, and the sinking groove 12 communicates with both the first water outlet 21 and the second water outlet 31. The end of the thermostat 4 is embedded in the sinking groove 12, and the coolant passing through the first water outlet 21 and the second water outlet 31 can enter the thermostat 4 through the sinking groove 12 to realize the large and small cycles of the engine cooling system.
[0038] Specifically, according to the temperature of the coolant flowing out of the cylinder head body 1, the forced circulation of the coolant is divided into a large cycle and a small cycle. The small cycle means that when the water temperature of the engine is low, the main valve of the thermostat 4 is closed and the sub-valve is opened, and the coolant directly enters the water pump. After being pressurized, it flows through the cylinder block water jacket and the cylinder head water jacket (i.e., the upper water jacket 2 and the lower water jacket 3) in sequence to complete the engine cooling cycle; the large cycle is when the temperature of the coolant flowing out of the engine exceeds the limit value at which the thermostat 4 opens, the main valve of the thermostat 4 is opened and the sub-valve is closed. The coolant flowing out of the cylinder head water jacket (i.e., the upper water jacket 2 and the lower water jacket 3) enters the radiator for cooling through the thermostat 4 and then returns to the water pump.
[0039] The thermostat 4 can adopt a common structure in the prior art, as long as the cavity structure of the sinking groove 12 is adapted to the end structure of the thermostat 4.
[0040] Compared with the prior art, for the cylinder head water jacket structure provided by the present utility model, a sinking groove 12 communicating with the first water outlet 21 and the second water outlet 31 is opened on the cylinder head body 1. The sinking groove 12 provides an installation space for assembling the thermostat 4, and the end part of the thermostat 4 can be partially embedded in the sinking groove 12, so as to reduce the occupied space and installation height of the thermostat 4 and improve the overall compactness of the engine.
[0041] In some embodiments, the above-mentioned mounting surface 11 can adopt the structure as Figure 1 shown, see Figure 1 , and the mounting surface 11 is located at the front part of the intake side 13 of the cylinder head body 1.
[0042] In the prior art, the water outlets of the cylinder head water jacket are usually arranged at the rear end of the cylinder head body 1, so the mounting surface 11 is arranged on the rear side wall surface of the cylinder head body 1. And the total vehicle water inlet interface is located at the front end of the engine, which requires designing a longer water outlet main pipe to connect the thermostat 4 and the vehicle pipeline, resulting in high cost and large weight of the whole engine, and the water outlet main pipe will also occupy space, and the engine layout is not compact.
[0043] In this embodiment, the mounting surface 11 is designed at the front part of the intake side 13 of the cylinder head body 1, which is closer to the total vehicle water inlet interface compared with the prior art. Therefore, the length of the water outlet main pipe can be correspondingly shortened, the cost can be reduced, and the weight can be reduced.
[0044] It should be noted that the intake side 13 and the exhaust side 14 of the cylinder head body 1 are oppositely arranged. For a four-cylinder engine, the four side surfaces of the cylinder head body 1 can be regarded as the front side surface, the intake side 13, the rear side surface and the exhaust side 14.
[0045] In some embodiments, the above-mentioned cylinder head body 1 can also adopt the structure as Figure 3 and Figure 4 shown, see Figure 3 and Figure 4 , and an overflow hole 15 is opened on the cylinder head body 1, and the overflow hole 15 communicates with the sinking groove 12.
[0046] In the prior art, the outlet of the cylinder head water jacket is usually arranged at the rear end of the cylinder head body 1. One of the reasons is that the coolant carrying gas directly enters the thermostat 4 from the upper water jacket 2 and the lower water jacket 3, and enters the vehicle radiator through the thermostat 4. Under the action of the bubbles, abnormal noises are likely to occur in the pipeline, affecting the NVH performance of the vehicle. To reduce the risk of abnormal noises, the thermostat 4 can only be arranged at the low point at the rear end of the engine (the front end of the engine is high and the rear end is low) to prevent bubbles from entering the thermostat 4, resulting in limited freedom of arrangement of the thermostat 4, and further increasing the length of the outlet manifold.
[0047] In this embodiment, in order to reduce the length of the outlet manifold, the thermostat 4 is arranged at the front end of the intake side 13 of the cylinder head body 1. And, in order to prevent the bubbles in the coolant from entering the thermostat 4, an overflow hole 15 is also opened on the cylinder head body 1; the coolant carrying gas in the upper water jacket 2 and the lower water jacket 3 is premixed in the sinking groove 12 before entering the thermostat 4, and the gas can be discharged from the overflow hole 15 out of the cylinder head body 1 to separate the gas from the liquid, thereby eliminating the hidden danger of abnormal noises and improving the NVH performance of the vehicle.
[0048] In some embodiments, the above mounting surface 11 can also adopt structures such as Figure 1 and Figure 2 shown in, see Figure 1 and Figure 2 , taking the outer wall surface of the intake side 13 of the cylinder head body 1 as the reference surface, the mounting surface 11 is inclined relative to the reference surface, and the mounting surface 11 is inclined upward from bottom to top towards the direction close to the reference surface.
[0049] If the mounting surface 11 is inclined relative to the reference surface, then the axis of the sinking groove 12 is also inclined relative to the reference surface. Further, the assembly surface of the thermostat 4 is not perpendicular to the reference surface, but is inclined upward relative to the reference surface.
[0050] One end of the thermostat 4 is embedded in the sinking groove 12, and the other end is inclined upward relative to the embedded end. In the left-right direction of the cylinder head body 1, the installation height of the thermostat 4 can be further reduced, improving the overall compactness of the engine.
[0051] Preferably, the included angle between the mounting surface 11 and the reference surface is 10 - 90°.
[0052] Please refer to Figure 2 and Figure 5 , on the basis of the above embodiment, the axis of the first outlet 21 and the axis of the second outlet 31 are both perpendicular to the mounting surface 11.
[0053] The main parts of the upper water jacket 2 and the lower water jacket 3 are parallel to the horizontal plane of the cylinder head body 1, and only the first water outlet 21 and the second water outlet 31 are upwardly tilted, which makes the water flow direction of the first water outlet 21 and the water flow direction of the second water outlet 31 parallel to the axial direction of the sinking groove 12 and the axial direction of the thermostat 4, so that the coolant enters the thermostat 4 smoothly without changing direction and hitting the thermostat 4 to produce abnormal noise.
[0054] In addition, the coolant passing through the first water outlet 21 and the coolant passing through the second water outlet 31 are mixed in advance in the sink 12 before entering the thermostat 4, which can further reduce abnormal noise.
[0055] In some embodiments, the upper water jacket 2 and the lower water jacket 3 may be provided with Figure 2 and Figure 3 The structure shown, see Figure 2 and Figure 3 The upper water jacket 2 and the lower water jacket 3 are separated by a middle partition 16, and a connecting hole is provided on the middle partition 16.
[0056] The upper water jacket 2 and the lower water jacket 3 are directly formed on the cylinder head body 1, so the middle partition 16 can be understood as a partition inside the cylinder head body 1. The middle partition 16 is also used to increase the strength of the cylinder head body 1.
[0057] Specifically, the bottom surface of the lower water jacket 3 is the cylinder head fire surface. Since the cylinder head body 1 forms the upper water jacket 2 and the lower water jacket 3, the cross-sectional area of each water jacket is relatively small, so that the coolant will accelerate the flow rate in the lower water jacket 3, thereby enhancing the cooling capacity of the cylinder head fire surface.
[0058] In some embodiments, the intermediate partition 16 may also be formed as follows: Figure 3 The structure shown, see Figure 3 A notch 17 is provided at the end of the middle partition 16 , and the notch 17 is connected to the first water outlet 21 , the second water outlet 31 and the sinking trough 12 .
[0059] The notch 17 is recessed relative to the sink 12 toward the first water outlet 21 and the second water outlet 31, that is, in the direction of water flow, the notch 17 is located upstream and the sink 12 is located downstream. Part of the coolant flowing out of the first water outlet 21 and the second water outlet 31 can first be collected at the notch 17 and then enter the sink 12.
[0060] The setting of the notch 17 can make part of the coolant mix in advance, thereby increasing the space for coolant mixing, further avoiding the impact of the thermostat 4 due to the excessive flow rate of the coolant, and further avoiding the generation of abnormal noise.
[0061] See also Figure 3, on the basis of the above - mentioned embodiments, the notch 17 has an arc - shaped outward - expanding portion 171 extending towards the first water outlet 21 and the second water outlet 31.
[0062] The cross - section of the arc - shaped outward - expanding portion 171 can be similar to a sector - shaped surface or a circular surface. It can be understood that the end of the intermediate partition 16 forms a protruding portion, and the protruding portion protrudes outward relative to the thickness direction of the intermediate partition 16 (i.e., towards the first water outlet 21 and the second water outlet 31), and the above - mentioned arc - shaped outward - expanding portion 171 is provided on the protruding portion.
[0063] The arc - shaped outward - expanding portion 171 extends towards the first water outlet 21 and the second water outlet 31, which is used to increase the volume of the notch 17, so as to further increase the space for the coolant to mix in advance, fully separate the gas and liquid, and further avoid generating abnormal noises.
[0064] Take Figure 3 as an example, the cross - section of the arc - shaped outward - expanding portion 171 in this embodiment is a sector. In addition, the notch 17 also has a strip - shaped portion 172, and the strip - shaped portion 172 and the arc - shaped outward - expanding portion 171 together form the notch 17.
[0065] Please refer to Figure 3 , on the basis of the above - mentioned embodiments, the center line of the end face of the intermediate partition 16 coincides with the radial center line of the bottom wall of the sinking groove 12.
[0066] The center line of the end face of the intermediate partition 16 coincides with the radial center line of the bottom wall of the sinking groove 12. That is to say, the intermediate partition 16 is located in the middle part of the sinking groove 12, and the spaces corresponding to the first water outlet 21 and the second water outlet 31 in the sinking groove 12 are equal. In this way, the flow rate and flow velocity of the coolant flowing through the first water outlet 21 and the coolant flowing through the second water outlet 31 are approximately equal, avoiding the reduction in speed or abnormal noise caused by uneven mixing of the coolant due to too large a difference in speed or flow rate.
[0067] In addition, the arc - shaped outward - expanding portion 171 is symmetrically arranged with respect to the center line of the end face of the intermediate partition 16.
[0068] Based on the same inventive concept, the embodiment of the present application also provides a vehicle, including the above - mentioned cylinder head water jacket structure.
[0069] For the vehicle provided by the present utility model, since the above - mentioned cylinder head water jacket structure is adopted, the thermostat 4 can be partially embedded in the sinking groove 12 of the cylinder head body 1, reducing the occupied space and installation height of the thermostat 4 and improving the compactness of the engine.
[0070] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A cylinder head water jacket structure, characterized in that, Comprising: A cylinder head body (1); an upper water jacket (2) and a lower water jacket (3) are formed on the cylinder head body (1); the upper water jacket (2) has a first water outlet (21), and the lower water jacket (3) has a second water outlet (31); an outer wall surface of the cylinder head body (1) has a mounting surface (11), and a sinking groove (12) is formed in the mounting surface (11), and the sinking groove (12) is respectively communicated with the first water outlet (21) and the second water outlet (31); and A thermostat (4), fixedly connected to the mounting surface (11), and one end thereof is embedded in the sinking groove (12).
2. The cylinder head water jacket structure according to claim 1, characterized in that, The mounting surface (11) is located at a front end portion of the intake side (13) of the cylinder head body (1).
3. The cylinder head water jacket structure according to claim 2, wherein, An air overflow hole (15) is formed in the cylinder head body (1), and the air overflow hole (15) is communicated with the sinking groove (12).
4. The cylinder head water jacket structure according to claim 1, characterized in that, Taking an outer wall surface of the intake side (13) of the cylinder head body (1) as a reference surface, the mounting surface (11) is inclined with respect to the reference surface, and the mounting surface (11) is inclined upward in a direction approaching the reference surface.
5. The cylinder head water jacket structure according to claim 4, characterized in that, Axes of the first water outlet (21) and the second water outlet (31) are both perpendicular to the mounting surface (11).
6. The cylinder head water jacket structure according to claim 1, characterized in that, The upper water jacket (2) and the lower water jacket (3) are isolated by an intermediate partition plate (16), and a communication hole is provided on the intermediate partition plate (16).
7. The cylinder head water jacket structure according to claim 6, wherein, An end portion of the intermediate partition plate (16) is provided with a notch (17), and the notch (17) is communicated with the first water outlet (21), the second water outlet (31) and the sinking groove (12).
8. The cylinder head water jacket structure according to claim 7, characterized in that, The notch (17) has an arc-shaped outward expansion portion (171) extending toward the first water outlet (21) and the second water outlet (31).
9. The cylinder head water jacket structure according to claim 6, wherein, A center line of an end face of the intermediate partition plate (16) coincides with a radial center line of a bottom wall of the sinking groove (12).
10. A vehicle, characterized in that, Including the cylinder head water jacket structure according to any one of claims 1-9.