Engine cooling water jacket structure

Abstract

This invention relates to an engine cooling water jacket structure, comprising: a water distribution chamber disposed inside the engine cylinder, the water distribution chamber having a cylinder block inlet; a cylinder head water jacket disposed inside the cylinder head, including an upper cylinder head water jacket and a lower cylinder head water jacket connected to each other, the upper cylinder head water jacket being connected to the water distribution chamber; and a cylinder block water jacket disposed inside the cylinder block, the cylinder block water jacket having a cylinder block outlet, the cylinder block water jacket being connected to the upper and lower cylinder head water jackets. This engine cooling water jacket structure can improve the cooling effect of various engine components and enhance their reliability.

Description

Technical Field

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

[0002] With increasingly stringent requirements for energy conservation and emission reduction, and greater user focus on vehicle fuel consumption, engines need to continuously increase their combustion pressure and reduce fuel consumption through thermal management. While increasing combustion pressure, the thermal load on components such as the cylinder block, cylinder head, and pistons also increases. Therefore, innovative cooling methods are needed to improve the cooling effect of these components and ensure more reliable engine operation.

[0003] Traditional coolant circulation systems use a bottom-up series cooling method, which results in poor cooling of engine components and reduces their reliability. Summary of the Invention

[0004] Therefore, it is necessary to provide an engine cooling water jacket structure to address the problem that poor cooling performance of various engine components reduces their reliability.

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

[0006] The water distribution chamber is located inside the cylinder of the engine, and the water distribution chamber is provided with a cylinder inlet.

[0007] A cylinder head water jacket is installed inside the cylinder head and includes an upper cylinder head water jacket and a lower cylinder head water jacket that are connected to each other. The upper cylinder head water jacket is connected to the water distribution chamber.

[0008] A cylinder water jacket is installed inside the cylinder block. The cylinder water jacket has a cylinder outlet and is connected to the upper cylinder head water jacket and the lower cylinder head water jacket.

[0009] In one embodiment, the water distribution chamber includes a water distribution chamber outlet, which is connected to the upper water jacket of the cylinder head.

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

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

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

[0013] In one embodiment, the water distribution chamber is located inside the cylinder body or cylinder head of the cylinder.

[0014] In one embodiment, the upper water jacket of the cylinder head includes a first water outlet channel disposed in the nose 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 disposed 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 head gasket hole, and the cylinder block water jacket includes cross holes;

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

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

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

[0020] The third water outlet channel is located above the piston position in the cylinder block;

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

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

[0023] The cylinder water jacket is installed inside the cylinder block of a multi-cylinder engine, and the cylinder water jackets inside the multi-cylinder engine are connected to each other.

[0024] The above-described method involves setting a water distribution chamber inside the engine cylinder, with a cylinder block inlet on the water distribution chamber. A cylinder head water jacket is installed inside the cylinder head, comprising an upper cylinder head water jacket and a lower cylinder head water jacket that are connected to each other. The upper cylinder head water jacket is connected to the water distribution chamber. A cylinder block water jacket is installed inside the cylinder block, connected to both the upper and lower cylinder head water jackets, and has a cylinder block outlet on the cylinder block water jacket. By setting up the above-mentioned engine cooling water jacket structure, water flows from the water distribution chamber into the upper cylinder head water jacket, and then through the upper and lower cylinder head water jackets into the cylinder block water jacket. The water distribution chamber can introduce the cooling water output by the water pump to each cylinder head, improving the uniformity of water flow to each cylinder head. At the same time, it enables the cooling water to focus on cooling the cylinder head bottom plate area and nose bridge area, and then cool the upper part of the cylinder block water jacket. This can better utilize the role of the cooling water, improve the cooling effect on the engine cylinder head, cylinder block and other parts, thereby improving the engine's fuel economy and the reliability of engine parts. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the engine cooling water jacket structure in one embodiment;

[0026] Figure 2 This is a schematic diagram of the engine cooling water jacket structure in another embodiment;

[0027] Figure 3 This is a partial structural diagram of the engine cooling water jacket structure in another embodiment.

[0028] Attached image annotations:

[0029] 100. Water distribution chamber; 201. Upper water jacket of cylinder head; 202. Lower water jacket of cylinder head; 300. Cylinder block water jacket; 400. Cylinder block water inlet; 500. Cylinder block water outlet; 600. First cylinder gasket hole; 700. Second cylinder gasket hole. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Traditional coolant circulation systems employ a bottom-up, series cooling method, resulting in poor cooling of engine components and reduced reliability. Specifically, a novel diesel engine cooling system includes interconnected cylinder block and cylinder head water jackets. The cylinder head water jacket has parallel-connected first, second, and cooling circulation pipes, as well as a radiator pipe. The other ends of these pipes are connected to the cylinder block water jacket via a water pump. However, this novel diesel engine cooling system focuses primarily on the cooling circulation pipes, emphasizing external circulation for cooling, without specifying the detailed structure of the cylinder block and cylinder head water jackets. Another type of diesel engine cooling water jacket includes a cylinder block, cylinder block water jacket, piston, cylinder head, and cylinder head water jacket. The cylinder block contains a cylinder liner, and the cylinder block water jacket is located outside the cylinder liner. The cylinder block water jacket includes a cylinder coolant chamber and cooling pipes. The piston is located inside the cylinder liner, and the cylinder head is located at the top of the cylinder block. A cylinder head water jacket is located inside the cylinder head, directly opposite the combustion chamber, and water inlet holes are provided on the side wall of the cylinder head. This diesel engine cooling water jacket primarily achieves full cooling of the cylinder block, cylinder head, and piston through multiple machined holes, but it does not address the specific flow direction within the cylinder block and cylinder head water jackets, nor does it address how to specifically address the thermal load issues of the cylinder block and cylinder head.

[0037] To address the problems of traditional technologies, an engine cooling water jacket structure is proposed that can improve the cooling effect and reliability of various engine components.

[0038] See Figure 1 , Figure 1 A schematic diagram of an engine cooling water jacket structure according to an embodiment of the present invention is shown. The engine cooling water jacket structure includes a water distribution chamber 100, a cylinder head water jacket, and a cylinder block water jacket 300, wherein...

[0039] A water distribution chamber 100 is located inside the engine cylinder, and a cylinder block inlet 400 is provided on the water distribution chamber 100. A cylinder head water jacket is located inside the cylinder head, including an upper cylinder head water jacket 201 and a lower cylinder head water jacket 202 that are connected to each other. The upper cylinder head water jacket 201 is connected to the water distribution chamber 100. A cylinder block water jacket 300 is located inside the cylinder block, and a cylinder block water outlet 500 is provided on the cylinder block water jacket 300. The cylinder block water jacket 300 is connected to the upper cylinder head water jacket 201 and the lower cylinder head water jacket 202.

[0040] Optionally, the water distribution chamber 100 is disposed inside the cylinder of the engine. In this embodiment, the engine type can be an inline engine, which can include multiple cylinders, and the multiple cylinders are connected in series.

[0041] The internal structure of the water distribution chamber 100 is as smooth as possible, and its cross-sectional area is as large as possible, which can be determined based on the flow rate and temperature of the cooling water. By setting a larger cross-sectional area and a smoother internal structure, the flow resistance of the cooling water can be reduced. At the same time, the water distribution chamber 100 is provided with a cylinder block inlet 400. The cooling water pumped by the water pump enters the water distribution chamber 100 through the cylinder block inlet 400. The water distribution chamber 100 delivers the cooling water pumped by the water pump to the cylinder head water jacket, thereby introducing cooling water to each cylinder head and making the water flow uniformity of each cylinder head better.

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

[0043] In one embodiment, the water distribution chamber 100 is disposed inside the cylinder block or cylinder head. The water distribution chamber 100 can be disposed inside either the cylinder block or the cylinder head; specifically, it can be disposed on the surface of the cylinder block water jacket 300 or the cylinder head water jacket. This allows for flexible placement of the water distribution chamber 100.

[0044] The cylinder head water jacket includes an upper cylinder head water jacket 201 and a lower cylinder head water jacket 202. 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, with the flow direction as follows: Figure 1 As shown in ①, the upper cylinder head water jacket 201 is mainly used to evenly distribute water flow, reduce structural resistance, and provide power for the water to flow towards the cylinder head nose area. 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 block water jacket 300 is located inside the cylinder block and is connected to the upper cylinder head water jacket 201 and the lower cylinder head water jacket 202. The upper cylinder head water jacket 201 can directly introduce coolant into the cylinder block water jacket 300, or the coolant can first be introduced into the lower cylinder head water jacket 202 and then introduced into the cylinder block water jacket 300 through the lower cylinder head water jacket 202.

[0046] In one embodiment, the cylinder block water jacket 300 is designed to be as short as possible, that is, as short as possible along the height of the cylinder block. This is more conducive to amplifying the warm-up effect, while the cooling water flow can be concentrated to play a cooling role and avoid unnecessary diversion.

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

[0048] In this embodiment, a water distribution chamber 100 is provided inside the engine cylinder, and a cylinder block inlet 400 is provided on the water distribution 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 to each other. The upper cylinder head water jacket 201 is connected to the water distribution chamber 100. A cylinder block water jacket 300 is provided inside the cylinder block, and the cylinder block water jacket 300 is connected to the upper cylinder head water jacket 201 and the lower cylinder head water jacket 202. A cylinder block outlet 500 is provided on the cylinder block water jacket 300. By setting up the above-mentioned engine cooling water jacket structure, water flows from the water distribution chamber 100 into the upper cylinder head water jacket 201, and then through the upper cylinder head water jacket 201 and the lower cylinder head water jacket 202 into the cylinder block water jacket 300. The water distribution chamber 100 can introduce the cooling water output by the water pump to each cylinder head, improve the uniformity of water flow in each cylinder head, and at the same time achieve the goal of focusing the cooling water on cooling the cylinder head bottom plate area and nose bridge area, and then cooling the upper part of the cylinder block water jacket 300. This can better utilize the role of the cooling water, improve the cooling effect on the engine cylinder head, cylinder block and other parts, thereby improving the engine's fuel economy and the reliability of the engine parts.

[0049] In an exemplary embodiment, the water distribution chamber 100 is connected to the lower cylinder head water jacket 202. Cooling water from the water distribution chamber 100 can first enter the lower cylinder head water jacket 202, which can directly introduce coolant into the upper cylinder head water jacket 201 and the cylinder block water jacket 300. The coolant passing through the upper cylinder head water jacket 201 then flows into the cylinder block water jacket 300 and finally flows out through the cylinder block outlet 500 provided on the cylinder block water jacket 300. This allows for the cooling of the cylinder head bottom plate area and the nose bridge area first.

[0050] In one exemplary embodiment, please continue to refer to Figure 1 Cylinder head water jacket, which is installed inside the cylinder head of a multi-cylinder engine. The upper cylinder head water jackets 201 inside the multi-cylinder engine are connected, while the lower cylinder head water jackets 202 inside the multi-cylinder engine are independent of each other. Cylinder block water jacket 300, which is installed inside the cylinder block of a multi-cylinder engine. The cylinder block water jackets 300 inside the multi-cylinder engine are 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. Each cylinder head has an internal cylinder head water jacket, and each cylinder block has an internal cylinder block water jacket 300. The multiple upper cylinder head water jackets 201 located inside the multiple cylinder heads are interconnected and can work together with the water distribution chamber 100 to allow coolant to fill the upper cylinder head water jackets 201 more quickly, reducing energy loss during the flow process.

[0052] The multiple lower water jackets 202 located inside the cylinder head are independent and not connected, which is more conducive to cooling the cylinder head base plate, especially the exhaust nose area, which refers to the area formed between the exhaust ports 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 embodiment, the multiple upper water jackets 201 of the cylinder heads disposed inside the cylinder heads can 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 distribution chamber 100 includes multiple water distribution chamber outlets, each of which is connected to the upper water jacket 201 of the corresponding cylinder head. The water distribution chamber 100 can communicate with multiple upper water jackets 201 of the cylinder head through multiple water distribution chamber outlets to introduce coolant into multiple upper water jackets 201 of the cylinder head, thereby improving the uniformity of water flow in each upper water jacket 201 of the cylinder head.

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

[0057] A first cylinder head gasket hole 600 is provided at the outlet of the water distribution chamber. This hole connects the outlet of the water distribution chamber to the first water inlet channel, thus enabling communication between the water distribution chamber 100 and the upper water jacket 201 of the cylinder head. Cooling water from the water distribution chamber 100 flows out through the outlet, passes through the first cylinder head gasket hole 600, and directly enters the upper water jacket 201 of the cylinder head. The cooling water flow direction is as follows: Figure 1 As shown in ①, that is, the direction of the arrow in the figure.

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

[0059] Combination Figure 2 and Figure 3As shown, Figure 2 A schematic diagram of the engine cooling water jacket structure according to another embodiment of the present invention is shown. Figure 3 A partial structural schematic diagram of an engine cooling water jacket structure according to another embodiment of the present invention is shown. The upper cylinder head water jacket 201 includes a first water outlet channel disposed in the nose region of the cylinder head, and the first water outlet channel is connected to the lower cylinder head water jacket 202.

[0060] The first water outlet channel of the upper water jacket 201 of the cylinder head is as follows Figure 2 and Figure 3 As indicated by the arrow ②, the direction of the arrow indicates the flow of cooling water. The first water outlet channel is located in the nose area of ​​the cylinder head and is connected to the lower water jacket 202 of the cylinder head. Most of the cooling water in 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. Because the first water outlet channel is located in the nose area of ​​the cylinder head, most of the cooling water in the upper water jacket 201 will concentrate and rush towards the nose area, significantly improving the cooling effect.

[0061] In one exemplary embodiment, please refer to Figure 2 and Figure 3 The upper water jacket 201 of the cylinder head includes a second water outlet channel, which is located in the bottom plate area of ​​the cylinder head. 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 that of the first water outlet channel.

[0062] The second water outlet channel of the upper water jacket 201 of the cylinder head is as follows Figure 2 and Figure 3 As indicated by arrow ③, the direction of the arrow indicates the flow of cooling water. The second water outlet channel is located in the bottom plate area of ​​the cylinder head and is connected to the lower water jacket 202 of the cylinder head. Most of the cooling water in the upper water jacket 201 of the cylinder head flows into the lower water jacket 202 of the cylinder head through the first and second water outlet channels. Because the second water outlet channel is located in the bottom plate area of ​​the cylinder head, for the poorly cooled bottom plate area, the cooling water flows into the lower water jacket 202 through the second water outlet channel, which can improve the cooling effect on the bottom plate area. The cross-sectional area of ​​the second water outlet channel is smaller than that of the first water outlet channel, causing most of the cooling water to concentrate at the bridge area and cascade down, which can significantly improve the cooling effect and help improve the reliability of the cylinder head.

[0063] In one exemplary embodiment, please refer to Figure 2 and Figure 3The engine cooling water jacket structure also includes a second cylinder head gasket water hole 700, and the cylinder block water jacket 300 includes a cross hole. The second cylinder head gasket water hole 700 is located at the water inlet of the cylinder block water jacket 300 and is used to connect the upper cylinder head water jacket 201 to the cross hole. The cross hole is located at the piston top position of the cylinder block and is used to connect the upper cylinder head water jacket 201 to the cylinder block water jacket 300.

[0064] Optionally, a second cylinder head gasket hole 700 is provided at the inlet of the cylinder block water jacket 300, through which the upper cylinder head water jacket 201 is connected to the cross hole. The cross hole on the cylinder block water jacket 300 is located at the piston top position of the cylinder block, and the upper cylinder head water jacket 201 is connected to the cylinder block water jacket 300 through the cross hole. Part of the coolant in the upper cylinder head water jacket 201 enters the cylinder block water jacket 300 through water outlet channels ④ and ⑤, then through the second cylinder head gasket hole 700, and then through the cross hole. The cross hole is provided at the cylinder block water jacket 300 to cool the piston top position, i.e., the piston ring position, to reduce the piston thermal load. The cross-sectional area at ④ and ⑤ should be small to avoid affecting the cooling of the cylinder head nose area.

[0065] In this embodiment, the upper cylinder head water jacket 201 can directly introduce cooling water into the cylinder block water jacket 300. Through the energy of the plunger and the design of the cross hole, the cooling effect of the piston rings is more significant, greatly improving the reliability of the piston and cylinder.

[0066] In one exemplary embodiment, please refer to Figure 2 and Figure 3 The engine cooling water jacket structure also includes a second cylinder head gasket water hole 700, and the lower cylinder head water jacket 202 includes a third water outlet channel. The third water outlet channel is located above the piston position in the cylinder block. The second cylinder head gasket water hole 700 is located at the water inlet of the cylinder block water jacket 300 and is used to connect the third water outlet channel to the cylinder block water jacket 300.

[0067] The lower cylinder head water jacket 202 includes a third water outlet channel and a second cylinder gasket hole 700 located at the water inlet of the cylinder block water jacket 300, which also connects the third water outlet channel to the cylinder block water jacket 300. The third water outlet channel may include... Figure 2 and Figure 3 ⑥, ⑦, ⑧, and ⑨ are the third water outlet channels, located above the piston position in the cylinder block. The cooling water from the lower cylinder head water jacket 202 passes through the third water outlet channels ⑥, ⑦, ⑧, and ⑨, and enters the cylinder block water jacket 300 through the second cylinder head gasket water hole 700 to reduce the piston's thermal load.

[0068] Optionally, the second cylinder water gasket hole 700 can adopt a structure of different sizes. The cross-sectional area of ​​each hole can 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 uniform as possible.

[0069] In this embodiment, the engine cooling water jacket structure further includes a second cylinder head gasket water hole 700. The lower cylinder head water jacket 202 includes a third water outlet channel, which is located above the piston position in the cylinder block. The second cylinder head gasket water hole 700 is located at the water inlet of the cylinder block water jacket 300, connecting the third water outlet channel to the cylinder block water jacket 300. Because the third water outlet channel is located above the piston position in the cylinder block, the cooling water from the lower cylinder head water jacket 202 passes through the third water outlet channel and enters the cylinder block water jacket 300 through the second cylinder head gasket water hole 700, which can reduce the piston thermal load in the cylinder block.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An engine cooling water jacket structure, characterized in that, The engine cooling water jacket structure includes: The water distribution chamber is located inside the cylinder of the engine, and the water distribution chamber is provided with a cylinder inlet. A cylinder head water jacket is installed inside the cylinder head and includes an upper cylinder head water jacket and a lower cylinder head water jacket that are connected to each other. The upper cylinder head water jacket is connected to the water distribution chamber. A cylinder water jacket is installed inside the cylinder block. The cylinder water jacket is provided with a cylinder water outlet. The cylinder water jacket is connected to the upper cylinder head water jacket and the lower cylinder head water jacket. The water distribution chamber is located on the surface of the cylinder water jacket; the cross-sectional area of ​​the water distribution chamber is determined according to the flow rate and temperature of the cooling water. The cylinder head water jacket is installed inside the cylinder head of a multi-cylinder engine. The upper water jackets inside the multi-cylinder head are connected, while the lower water jackets inside the multi-cylinder head are independent of each other. The cylinder water jacket is installed inside the cylinder block of a multi-cylinder engine, and the cylinder water jackets inside the multi-cylinder engine are connected to each other. The upper water jacket of the cylinder head includes a first water outlet channel and a second water outlet channel. The first water outlet channel is located in the nose area of ​​the cylinder head, and the second water outlet channel is located in the bottom plate area of ​​the cylinder head. Both the first water outlet channel and the second water outlet channel are connected to the lower water jacket of the cylinder head. The cross-sectional area of ​​the second water outlet channel is smaller than that of the first water outlet channel.

2. The engine cooling water jacket structure according to claim 1, characterized in that, The water distribution chamber includes a water distribution chamber outlet, which is connected to 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 also includes a first cylinder head gasket hole, and the upper cylinder head water jacket includes a first water inlet channel; The first cylinder head gasket water hole is located at the outlet of the water distribution chamber, and the first cylinder head gasket water hole is used to connect the outlet of the water distribution 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 first cylinder gasket water hole is greater than or equal to the cross-sectional area of ​​the water outlet of the water distribution chamber.

5. The engine cooling water jacket structure according to claim 1, characterized in that, The water distribution chamber is connected to the lower water jacket of the cylinder head.

6. The engine cooling water jacket structure according to claim 1, characterized in that, The multiple upper water jackets of the cylinder heads, which are disposed inside the cylinder heads, are disconnected and independent of each other, and there is no communication between the upper water jackets of each cylinder head.

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

8. The engine cooling water jacket structure according to claim 1, characterized in that, The engine cooling water jacket structure also includes a second cylinder head gasket hole, and the lower cylinder head water jacket includes a third water outlet channel. The third water outlet channel is located above the piston position in the cylinder block; The second cylinder gasket water hole is located at the water inlet of the cylinder water jacket and is used to connect the third water outlet channel to the cylinder water jacket.

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