Cooling water jacket structure of engine

Abstract

The invention relates to an engine cooling water jacket structure which comprises a water distribution cavity, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, and the water distribution cavity is arranged in an air cylinder of an engine; the cylinder cover water jacket is arranged in the cylinder cover and comprises a cylinder cover upper-layer water jacket and a cylinder cover lower-layer water jacket which are communicated with each other, and the cylinder cover upper-layer water jacket is communicated with the water diversion cavity; the cylinder body water jacket is arranged in the cylinder body, a cylinder body water outlet is formed in the cylinder body water jacket, and the cylinder body water jacket is communicated with the cylinder cover upper-layer water jacket and the cylinder cover lower-layer water jacket. The engine cooling water jacket structure can improve the cooling effect of all parts of the engine and improve the reliability of all the parts of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to an engine cooling water jacket structure. Background Art

[0002] As energy conservation and emission reduction requirements continue to tighten, and users pay more attention to vehicle fuel consumption, engines need to continuously increase explosion pressure and continuously reduce fuel consumption through thermal management. While increasing explosion pressure, the heat load of components such as cylinder blocks, cylinder heads and pistons continues to increase. Therefore, innovative cooling methods are needed to improve the cooling effect of components such as cylinder blocks, cylinder heads and pistons to ensure more reliable engine operation.

[0003] The traditional coolant circulation system adopts a bottom-up series cooling method, which results in poor cooling effect of various engine parts and reduces the reliability of various engine parts. Summary of the invention

[0004] Based on this, it is necessary to provide an engine cooling water jacket structure to address the problem that the cooling effect of various engine parts is poor and the reliability of various engine parts is reduced.

[0005] In one embodiment, an engine cooling water jacket structure includes:

[0006] A water-dividing chamber is arranged inside the cylinder of the engine, and a cylinder water inlet is arranged on the water-dividing chamber;

[0007] A cylinder head water jacket is arranged inside the cylinder head, comprising an upper cylinder head water jacket and a lower cylinder head water jacket which are connected, wherein the upper cylinder head water jacket is connected to the water dividing chamber;

[0008] The cylinder water jacket is arranged inside the cylinder body, the cylinder water jacket is provided with a cylinder water outlet, and the cylinder water jacket is communicated with the cylinder head upper water jacket and the cylinder head lower water jacket.

[0009] In one of the embodiments, the water diversion chamber includes a water diversion chamber outlet, and the water diversion chamber outlet is communicated with the upper water jacket of the cylinder head.

[0010] In one embodiment, the engine cooling water jacket structure further includes a first cylinder gasket water hole, and the cylinder head upper water jacket includes a first water inlet channel;

[0011] The first cylinder gasket water hole is arranged at the water outlet of the water dividing chamber, and the first cylinder gasket water hole is used to connect the water outlet of the water dividing chamber with the first water inlet channel.

[0012] In one of the embodiments, the size of the water hole of the first cylinder gasket is greater than or equal to the cross-sectional area of ​​the water outlet of the water diversion chamber.

[0013] In one of the embodiments, the water diversion chamber is arranged inside the cylinder body or cylinder head of the cylinder.

[0014] In one of the embodiments, the upper water jacket of the cylinder head includes a first water outlet channel, which is arranged in the nose bridge area of ​​the cylinder head, and the first water outlet channel is connected to the lower water jacket of the cylinder head.

[0015] In one embodiment, the upper water jacket of the cylinder head includes a second water outlet channel, which is arranged in the bottom plate area of ​​the cylinder head, and the second water outlet channel is connected to the lower water jacket of the cylinder head; the cross-sectional area of ​​the second water outlet channel is smaller than the cross-sectional area of ​​the first water outlet channel.

[0016] In one embodiment, the engine cooling water jacket structure further includes a second cylinder gasket water hole, and the cylinder water jacket includes a cross hole;

[0017] The second cylinder gasket water hole is arranged at the water inlet of the cylinder water jacket and is used to connect the upper water jacket of the cylinder head with the cross hole;

[0018] The cross hole is arranged at the top of the piston of the cylinder body and is used to connect the upper water jacket of the cylinder head with the water jacket of the cylinder body.

[0019] In one embodiment, the engine cooling water jacket structure further includes a second cylinder gasket water hole, and the cylinder head lower water jacket includes a third water outlet channel;

[0020] The third water outlet channel is arranged above the piston position of the cylinder body;

[0021] The second cylinder gasket water hole is arranged at the water inlet of the cylinder water jacket, and is used to connect the third water outlet channel with the cylinder water jacket.

[0022] In one embodiment, the cylinder head water jacket is arranged inside the cylinder head of the multi-cylinder engine, the cylinder head upper water jackets inside the multi-cylinder head are connected, and the cylinder head lower water jackets inside the multi-cylinder head are independent of each other;

[0023] The cylinder water jacket is arranged inside the cylinder body of the multi-cylinder engine, and the cylinder water jackets inside the multi-cylinder bodies are connected.

[0024] The above method is to set a water dividing chamber inside the cylinder of the engine, and a cylinder water inlet is set on the water dividing chamber. A cylinder head water jacket is set inside the cylinder head, and the cylinder head water jacket includes an upper cylinder head water jacket and a lower cylinder head water jacket that are connected, and the upper cylinder head water jacket is connected to the water dividing chamber. A cylinder water jacket is set inside the cylinder body, and the cylinder water jacket is connected to the upper cylinder head water jacket and the lower cylinder head water jacket, and a cylinder water outlet is set on the cylinder water jacket. By providing the above-mentioned engine cooling water jacket structure, water flows from the water distribution chamber into the upper water jacket of the cylinder head, and then flows into the cylinder body water jacket through the upper water jacket of the cylinder head and the lower water jacket of the cylinder head. The water distribution chamber can introduce the cooling water output by the water pump into each cylinder head, thereby improving the uniformity of the water flow of each cylinder head, and at the same time realizing that the cooling water is cooled mainly in the bottom plate area and the nose bridge area of ​​the cylinder head, and then the upper part of the cylinder body water jacket is cooled, so that the cooling water can be better exerted, and the cooling effect of various parts of the engine such as the cylinder head and the cylinder body is improved, thereby improving the fuel saving effect of the engine and improving the reliability of various parts of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of an engine cooling water jacket structure in one embodiment;

[0026] FIG2 is a schematic structural diagram of an engine cooling water jacket structure in another embodiment;

[0027] FIG. 3 is a partial structural diagram of an engine cooling water jacket structure in another embodiment.

[0028] Notes on the attached drawings:

[0029] 100, water distribution chamber; 201, upper water jacket of cylinder head; 202, lower water jacket of cylinder head; 300, cylinder body water jacket; 400, cylinder body water inlet; 500, cylinder body water outlet; 600, first cylinder gasket water hole; 700, second cylinder gasket water hole. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] The traditional coolant circulation system adopts a bottom-up series cooling method, which results in poor cooling effect of various engine parts and reduces the reliability of various engine parts. Specifically, a new diesel engine cooling system includes a cylinder water jacket and a cylinder head water jacket that are connected. The cylinder head water jacket is connected in parallel with a first cooling circulation pipeline, a second cooling circulation pipeline, and a heat dissipation pipeline. The other ends of the first cooling circulation pipeline, the second cooling circulation pipeline and the heat dissipation pipeline are all connected to the cylinder water jacket through a water pump. However, this new diesel engine cooling system mainly describes the cooling circulation pipeline and relies more on external circulation for cooling, without explaining the specific structure of the cylinder water jacket. Another diesel engine cooling water jacket includes a cylinder block, a cylinder block water jacket, a piston, a cylinder head and a cylinder head water jacket. The cylinder block is provided with a cylinder liner, the cylinder liner is provided with a cylinder block water jacket outside, the cylinder block water jacket includes a columnar cold water cavity and a cooling pipe, the cylinder liner is provided with a piston, the cylinder block is provided with a cylinder head at the top, the cylinder head is provided with a cylinder head water jacket facing the combustion chamber, and the cylinder head side wall is provided with a water inlet hole. The diesel engine cooling water jacket mainly realizes full cooling of the cylinder block, cylinder head, piston, etc. through multiple machine-added holes, but does not involve the specific flow direction inside the cylinder block and cylinder head water jacket, nor does it involve how to specifically solve the problem of heat load of the cylinder block and cylinder head.

[0037] In view of the problems existing in the traditional technology, an engine cooling water jacket structure is proposed which can improve the cooling effect of various engine parts and improve the reliability of various engine parts.

[0038] Referring to FIG. 1 , FIG. 1 shows a schematic diagram of the structure of an engine cooling water jacket structure in an embodiment of the present invention. The engine cooling water jacket structure includes a water separation chamber 100, a cylinder head water jacket and a cylinder body water jacket 300, wherein:

[0039] The water-dividing chamber 100 is arranged inside the cylinder of the engine, and a cylinder water inlet 400 is arranged on the water-dividing chamber 100. The cylinder head water jacket is arranged inside the cylinder head, and includes a cylinder head upper water jacket 201 and a cylinder head lower water jacket 202 which are connected, and the cylinder head upper water jacket 201 is connected to the water-dividing chamber 100. The cylinder body water jacket 300 is arranged inside the cylinder body, and a cylinder body water outlet 500 is arranged on the cylinder body water jacket 300, and the cylinder body water jacket 300 is connected to the cylinder head upper water jacket 201 and the cylinder head lower water jacket 202.

[0040] Optionally, the water diversion chamber 100 is disposed inside a cylinder of an engine. The type of the engine in this embodiment may be an in-line structure engine. The in-line structure engine may include a plurality of cylinders, and the connection between the plurality of cylinders is a series connection.

[0041] The internal structure of the water-dividing chamber 100 is as smooth as possible, and the cross-sectional area of ​​the water-dividing chamber 100 is as large as possible, which can be determined specifically according to the flow rate and temperature of the cooling water. By setting a larger cross-sectional area and an internal structure that is as smooth as possible, the flow resistance to the cooling water can be reduced. At the same time, a cylinder water inlet 400 is provided on the water-dividing chamber 100, and the cooling water pumped by the water pump enters the water-dividing chamber 100 from the cylinder water inlet 400. The water-dividing chamber 100 delivers the cooling water pumped by the water pump to the cylinder head water jacket, thereby introducing the cooling water into each cylinder head, so that the water flow uniformity of each cylinder head is better.

[0042] In one embodiment, the shape of the cylinder water inlet 400 can be rectangular, cylindrical, etc. The cross-sectional area of ​​the cylinder water inlet 400 is as large as possible to reduce throttling and lower resistance.

[0043] In one embodiment, the water dividing chamber 100 is disposed inside the cylinder body or the cylinder head of the cylinder. The water dividing chamber 100 can be disposed inside the cylinder body or the cylinder head, and can be disposed on the surface of the cylinder body water jacket 300 or the surface of the cylinder head water jacket, so as to realize the flexible setting of the position of the water dividing chamber 100.

[0044] The cylinder head water jacket includes an upper cylinder head water jacket 201 and a lower cylinder head water jacket 202, and the upper cylinder head water jacket 201 is connected to the water distribution chamber 100. The water distribution chamber 100 introduces cooling water into the upper cylinder head water jacket 201, and the flow direction is shown as ① in Figure 1. The upper cylinder head water jacket 201 is mainly used to evenly distribute the water flow, while reducing the resistance caused by the structure and providing power to dive toward the nose bridge area of ​​the cylinder head. Since the upper cylinder head water jacket 201 and the lower cylinder head water jacket 202 are connected, the cooling water flowing through the upper cylinder head water jacket 201 can flow into the lower cylinder head water jacket 202.

[0045] The cylinder water jacket 300 is arranged inside the cylinder block, and the cylinder water jacket 300 is connected with the cylinder head upper water jacket 201 and the cylinder head lower water jacket 202. The cylinder head upper water jacket 201 can directly introduce cooling water into the cylinder water jacket 300, or the cooling water can be first introduced into the cylinder head lower water jacket 202, and then introduced into the cylinder water jacket 300 through the cylinder head lower water jacket 202.

[0046] In one of the embodiments, the cylinder water jacket 300 is designed to be as short as possible, that is, as short as possible along the height direction of the cylinder body, which is more conducive to amplifying the warm-up effect. At the same time, the cooling water flow can be concentrated to play a cooling role and avoid unnecessary diversion.

[0047] The cylinder water jacket 300 is provided with a cylinder water outlet 500 , and the coolant in the cylinder water jacket 300 flows out through the cylinder water outlet 500 .

[0048] In this embodiment, a water dividing chamber 100 is provided inside the cylinder of the engine, and a cylinder water inlet 400 is provided on the water dividing chamber 100. A cylinder head water jacket is provided inside the cylinder head, and the cylinder head water jacket includes an upper cylinder head water jacket 201 and a lower cylinder head water jacket 202 that are connected, and the upper cylinder head water jacket 201 is connected to the water dividing chamber 100. A cylinder water jacket 300 is provided inside the cylinder body, and the cylinder water jacket 300 is connected to the upper cylinder head water jacket 201 and the lower cylinder head water jacket 202, and a cylinder water outlet 500 is provided on the cylinder water jacket 300. By providing the above-mentioned engine cooling water jacket structure, water flows from the water dividing chamber 100 into the cylinder head upper water jacket 201, and then flows into the cylinder body water jacket 300 through the cylinder head upper water jacket 201 and the cylinder head lower water jacket 202. The water dividing chamber 100 can introduce the cooling water output by the water pump into each cylinder head, thereby improving the uniformity of the water flow of each cylinder head, and at the same time realizing that the cooling water is cooled mainly in the cylinder head bottom plate area and the nose bridge area, and then cools the upper part of the cylinder body water jacket 300, which can better play the role of cooling water and improve the cooling effect of various parts of the engine such as the cylinder head and cylinder body, thereby improving the fuel saving effect of the engine and improving the reliability of various parts of the engine.

[0049] In an exemplary embodiment, the water-dividing chamber 100 is connected to the lower water jacket 202 of the cylinder head, and the cooling water from the water-dividing chamber 100 can first enter the lower water jacket 202 of the cylinder head, and the lower water jacket 202 of the cylinder head can directly introduce the coolant into the upper water jacket 201 of the cylinder head and the cylinder water jacket 300. The coolant passing through the upper water jacket 201 of the cylinder head then flows into the cylinder water jacket 300, and finally flows out through the cylinder water outlet 500 provided on the cylinder water jacket 300. It can be achieved that the bottom plate area and the nose bridge area of ​​the cylinder head are cooled first.

[0050] In an exemplary embodiment, please continue to refer to Figure 1, the cylinder head water jacket is arranged inside the cylinder head of a multi-cylinder engine, the cylinder head upper water jacket 201 inside the multi-cylinder head is connected, and the cylinder head lower water jacket 202 inside the multi-cylinder head is independent of each other; the cylinder body water jacket 300 is arranged inside the cylinder body of a multi-cylinder engine, and the cylinder body water jacket 300 inside the multi-cylinder body is connected.

[0051] Optionally, the engine in this embodiment is a multi-cylinder engine, including multiple cylinders, each cylinder including a cylinder block and a cylinder head. A cylinder head water jacket is provided inside each cylinder head, and a cylinder block water jacket 300 is provided inside each cylinder block. The multiple cylinder head upper water jackets 201 provided inside the multiple cylinder heads are interconnected, and can be combined with the water distribution chamber 100 to allow the cooling water to fill the cylinder head upper water jacket 201 faster, thereby reducing the energy loss of the process flow.

[0052] The multiple cylinder head lower water jackets 202 arranged inside the multi-cylinder head are independent of each other and not connected, which is more conducive to cooling the cylinder head bottom plate, especially the row of nose bridge areas, which refers to the area formed between the exhaust port openings in the cylinder head.

[0053] In one embodiment, the structure of the upper water jacket 201 of each cylinder head is as thin as possible to reduce the total volume of the water jacket.

[0054] In one of the embodiments, the multiple cylinder head upper water jackets 201 disposed inside the multiple cylinder heads may also be disconnected, independent of each other, and not connected to each other, which is more conducive to cooling the cylinder head bottom plate.

[0055] In an exemplary embodiment, the water-dividing chamber 100 includes a plurality of water-dividing chamber outlets, each of which is connected to the cylinder head upper water jacket 201 of the corresponding cylinder head. The water-dividing chamber 100 can be connected to the plurality of cylinder head upper water jackets 201 through the plurality of water-dividing chamber outlets to introduce the coolant into the plurality of cylinder head upper water jackets 201, thereby improving the uniformity of the water flow of each cylinder head upper water jacket 201.

[0056] In an exemplary embodiment, please continue to refer to Figure 1, the engine cooling water jacket structure also includes a first cylinder gasket water hole 600, and the cylinder head upper water jacket 201 includes a first water inlet channel; the first cylinder gasket water hole 600 is arranged at the water outlet of the water dividing chamber, and the first cylinder gasket water hole 600 is used to connect the water outlet of the water dividing chamber with the first water inlet channel.

[0057] The water outlet of the water diversion chamber is provided with a first cylinder gasket water hole 600, and the water outlet of the water diversion chamber is connected with the first water inlet channel through the first cylinder gasket water hole 600, so as to realize the communication between the water diversion chamber 100 and the cylinder head upper water jacket 201. The cooling water from the water diversion chamber 100 flows out through the water diversion chamber outlet, passes through the first cylinder gasket water hole 600 and directly enters the cylinder head upper water jacket 201, and the cooling water flows in the direction shown in ① of FIG1, that is, the direction of the arrow in the figure.

[0058] Optionally, the size of the first cylinder gasket water hole 600 is greater than or equal to the cross-sectional area of ​​the water outlet of the water diversion chamber to reduce flow resistance.

[0059] As shown in Figure 2 and Figure 3, Figure 2 shows a schematic diagram of the structure of an engine cooling water jacket in another embodiment of the present invention, and Figure 3 shows a schematic diagram of a portion of the structure of an engine cooling water jacket in another embodiment of the present invention. The upper water jacket 201 of the cylinder head includes a first water outlet channel, which is arranged in the nose bridge area of ​​the cylinder head, and the first water outlet channel is connected to the lower water jacket 202 of the cylinder head.

[0060] The first water outlet channel of the upper water jacket 201 of the cylinder head is shown as ② indicated by the arrow in Figures 2 and 3, and the direction of the arrow indicates the flow direction of the cooling water. The first water outlet channel is arranged in the nose bridge area of ​​the cylinder head, and the first water outlet channel is connected to the lower water jacket 202 of the cylinder head. Most of the cooling water of the upper water jacket 201 of the cylinder head flows into the lower water jacket 202 of the cylinder head through the first water outlet channel. Since the first water outlet channel is arranged in the nose bridge area of ​​the cylinder head, most of the cooling water in the upper water jacket 201 of the cylinder head will be concentrated and dived toward the nose bridge area, which can significantly improve the cooling effect.

[0061] In an exemplary embodiment, referring to Figures 2 and 3, the upper water jacket 201 of the cylinder head includes a second water outlet channel, which is arranged in the bottom plate area of ​​the cylinder head, and the second water outlet channel is connected to the lower water jacket 202 of the cylinder head; the cross-sectional area of ​​the second water outlet channel is smaller than the cross-sectional area of ​​the first water outlet channel.

[0062] The second water outlet channel of the upper water jacket 201 of the cylinder head is shown as ③ indicated by the arrow in Figures 2 and 3, and the direction of the arrow indicates the flow direction of the cooling water. The second water outlet channel is arranged in the bottom plate area of ​​the cylinder head, and the second water outlet channel is connected to the lower water jacket 202 of the cylinder head. Most of the cooling water of the upper water jacket 201 of the cylinder head flows into the lower water jacket 202 of the cylinder head through the first water outlet channel and the second water outlet channel. Since the second water outlet channel is arranged in the bottom plate area of ​​the cylinder head, for the bottom plate area of ​​the cylinder head with poor cooling effect, the cooling water flows into the lower water jacket 202 of the cylinder head through the second water outlet channel, which can improve the cooling effect of the bottom plate area. The cross-sectional area of ​​the second water outlet channel is smaller than the cross-sectional area of ​​the first water outlet channel, so that most of the cooling water is concentrated to the nose bridge area to dive, which can significantly improve the cooling effect and help improve the reliability of the cylinder head.

[0063] In an exemplary embodiment, referring to FIG. 2 and FIG. 3 , the engine cooling water jacket structure further includes a second cylinder gasket water hole 700, and the cylinder water jacket 300 includes a cross hole. The second cylinder gasket water hole 700 is provided at the water inlet of the cylinder water jacket 300, and is used to connect the cylinder head upper water jacket 201 with the cross hole. The cross hole is provided at the top position of the piston of the cylinder body, and is used to connect the cylinder head upper water jacket 201 with the cylinder water jacket 300.

[0064] Optionally, a second cylinder gasket water hole 700 is provided at the water inlet of the cylinder water jacket 300, and the cylinder head upper water jacket 201 is connected to the cross hole through the second cylinder gasket water hole 700. The cross hole on the cylinder water jacket 300 is provided at the piston top position of the cylinder body, and the cylinder head upper water jacket 201 is connected to the cylinder water jacket 300 through the cross hole. Part of the coolant of the cylinder head upper water jacket 201 passes through the water outlet channels ④ and ⑤, and then passes through the second cylinder gasket water hole 700, and then enters the cylinder water jacket 300 through the cross hole. A cross hole is provided at the cylinder water jacket 300 for cooling the top position of the piston, that is, the piston first ring position, to reduce the heat load of the piston. The cross-sectional area at ④ and ⑤ should be small to avoid affecting the cooling at the nose bridge area of ​​the cylinder head.

[0065] In this embodiment, the cylinder head upper water jacket 201 can directly introduce cooling water into the cylinder body water jacket 300. Through the energy of diving and the design of cross holes, the cooling effect of the piston ring is more significant, which greatly improves the reliability of the piston and the cylinder body.

[0066] In an exemplary embodiment, referring to FIG. 2 and FIG. 3 , the engine cooling water jacket structure further includes a second cylinder gasket water hole 700, and the cylinder head lower water jacket 202 includes a third water outlet channel. The third water outlet channel is arranged above the piston position of the cylinder body. The second cylinder gasket water hole 700 is arranged at the water inlet of the cylinder water jacket 300, and is used to connect the third water outlet channel with the cylinder water jacket 300.

[0067] The lower water jacket 202 of the cylinder head includes a third water outlet channel, a second cylinder gasket water hole 700 disposed at the water inlet of the cylinder water jacket 300, and is also used to connect the third water outlet channel with the cylinder water jacket 300. The third water outlet channel may include ⑥, ⑦, ⑧ and ⑨ in Figures 2 and 3. The third water outlet channel is disposed above the piston position of the cylinder body. The cooling water of the lower water jacket 202 of the cylinder head passes through the third water outlet channels ⑥, ⑦, ⑧ and ⑨, and enters the cylinder water jacket 300 through the second cylinder gasket water hole 700, so as to reduce the heat load of the piston.

[0068] Optionally, the second cylinder gasket water holes 700 may have structures of different sizes, and the cross-sectional area of ​​each hole may be determined according to the flow rate and temperature of the cooling water. The cross-sectional area of ​​each hole is designed to make the water flow of each cylinder as evenly distributed as possible.

[0069] In this embodiment, the engine cooling water jacket structure further includes a second cylinder gasket water hole 700, the cylinder head lower water jacket 202 includes a third water outlet channel, the third water outlet channel is arranged above the piston position of the cylinder body, and the second cylinder gasket water hole 700 is arranged at the water inlet of the cylinder body water jacket 300, which is used to connect the third water outlet channel with the cylinder body water jacket 300. Since the third water outlet channel is arranged above the piston position of the cylinder body, the cooling water of the cylinder head lower water jacket 202 passes through the third water outlet channel and enters the cylinder body water jacket 300 through the second cylinder gasket water hole 700, which can reduce the heat load of the piston in the cylinder body.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An engine cooling water jacket structure, characterized in that: The engine cooling water jacket structure comprises: A water-dividing chamber is arranged inside the cylinder of the engine, and a cylinder water inlet is arranged on the water-dividing chamber; A cylinder head water jacket is arranged inside the cylinder head, comprising an upper cylinder head water jacket and a lower cylinder head water jacket which are connected, wherein the upper cylinder head water jacket is connected to the water dividing chamber; The cylinder water jacket is arranged inside the cylinder body, the cylinder water jacket is provided with a cylinder water outlet, and the cylinder water jacket is communicated with the cylinder head upper water jacket and the cylinder head lower water jacket.

2. The engine cooling water jacket structure according to claim 1, characterized in that: The water diversion chamber comprises a water diversion chamber water outlet, and the water diversion chamber water outlet is communicated with the upper water jacket of the cylinder head.

3. The engine cooling water jacket structure according to claim 2, characterized in that: The engine cooling water jacket structure further includes a first cylinder gasket water hole, and the cylinder head upper water jacket includes a first water inlet channel; The first cylinder gasket water hole is arranged at the water outlet of the water dividing chamber, and the first cylinder gasket water hole is used to connect the water outlet of the water dividing chamber with the first water inlet channel.

4. The engine cooling water jacket structure according to claim 3, characterized in that: The size of the water hole of the first cylinder gasket is greater than or equal to the cross-sectional area of ​​the water outlet of the water diversion chamber.

5. The engine cooling water jacket structure according to claim 1, characterized in that: The water-dividing chamber is arranged inside the cylinder body or the cylinder cover of the cylinder.

6. The engine cooling water jacket structure according to claim 1, characterized in that: The upper water jacket of the cylinder head comprises a first water outlet channel, which is arranged in the nose bridge area of ​​the cylinder head, and the first water outlet channel is communicated with the lower water jacket of the cylinder head.

7. The engine cooling water jacket structure according to claim 6, characterized in that: The upper water jacket of the cylinder head includes a second water outlet channel, which is arranged in the bottom plate area of ​​the cylinder head. The second water outlet channel is connected to the lower water jacket of the cylinder head. The cross-sectional area of ​​the second water outlet channel is smaller than the cross-sectional area of ​​the first water outlet channel.

8. The engine cooling water jacket structure according to claim 1, characterized in that: The engine cooling water jacket structure further includes a second cylinder gasket water hole, and the cylinder water jacket includes a cross hole; The second cylinder gasket water hole is arranged at the water inlet of the cylinder water jacket and is used to connect the upper water jacket of the cylinder head with the cross hole; The cross hole is arranged at the top of the piston of the cylinder body and is used to connect the upper water jacket of the cylinder head with the water jacket of the cylinder body.

9. The engine cooling water jacket structure according to claim 1, characterized in that: The engine cooling water jacket structure further includes a second cylinder gasket water hole, and the cylinder head lower layer water jacket includes a third water outlet channel; The third water outlet channel is arranged above the piston position of the cylinder body; The second cylinder gasket water hole is arranged at the water inlet of the cylinder water jacket, and is used to connect the third water outlet channel with the cylinder water jacket.

10. The engine cooling water jacket structure according to claim 1, characterized in that: The cylinder head water jacket is arranged inside the cylinder head of the multi-cylinder engine, the cylinder head upper water jackets inside the multi-cylinder head are connected, and the cylinder head lower water jackets inside the multi-cylinder head are independent of each other; The cylinder water jacket is arranged inside the cylinder body of the multi-cylinder engine, and the cylinder water jackets inside the multi-cylinder bodies are connected.

Images