Engine water jacket structure

Abstract

The invention discloses an engine water jacket structure, and relates to the field of engine cooling. The water jacket structure specifically comprises a plurality of water jacket units which are arranged side by side and communicated with one another, each water jacket unit comprises a cylinder cover upper-layer water jacket, a cylinder cover lower-layer water jacket, a cylinder body water jacket and a cylinder body auxiliary water jacket, the cylinder cover upper-layer water jackets transversely extend and are located above the cylinder cover lower-layer water jackets, flow guide parts are arranged on the cylinder cover upper-layer water jackets, and the cylinder cover lower-layer water jackets are located above the cylinder cover lower-layer water jackets; the cylinder cover lower-layer water jacket is vertically arranged in an extending mode and communicated with the cylinder cover upper-layer water jacket, the cylinder body water jacket is located below the cylinder cover lower-layer water jacket and communicated with the cylinder cover lower-layer water jacket, and the cylinder body auxiliary water jacket is located on one side of the cylinder body water jacket and communicated with the cylinder body water jacket. According to the water jacket structure, the flowing resistance of the cooling liquid can be effectively reduced, uniform distribution and flow control of the cooling liquid can be achieved, the cooling efficiency is improved, and the problems of cooling dead zones and the like are solved.

Description

Technical Field

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

[0002] With the national energy diversification strategy, the use of low-carbon green methanol as an alternative fuel has become an indispensable choice. It has obvious economic effects and high fuel economy. The development of large and efficient methanol engines is an important part of the application of methanol fuel in commercial vehicles. The development of a reliable and efficient large engine requires a good cooling system, especially the cooling water jacket. Limited by large and efficient methanol engines, most of the existing engine water jackets have problems such as large pressure drop resistance, uneven heat exchange, dead zone formation in the flow process of the cylinder block and cylinder head, and even high temperature. Summary of the invention

[0003] In view of this, the present invention provides an engine water jacket structure, which can effectively reduce the flow resistance of coolant and improve the cooling efficiency.

[0004] The present invention provides an engine water jacket structure, comprising a plurality of water jacket units arranged side by side and interconnected, wherein the water jacket units include an upper water jacket of a cylinder head, a lower water jacket of a cylinder head, a cylinder body water jacket, and a cylinder body auxiliary water jacket, wherein the upper water jacket of the cylinder head is extended transversely and is located above the lower water jacket of the cylinder head, a guide portion is provided on the upper water jacket of the cylinder head, the lower water jacket of the cylinder head is extended vertically and is connected with the upper water jacket of the cylinder head, the cylinder body water jacket is located below the lower water jacket of the cylinder head and is connected with the lower water jacket of the cylinder head, and the cylinder body auxiliary water jacket is located on one side of the cylinder body water jacket and is connected with the cylinder body water jacket.

[0005] Furthermore, it also includes a water inlet and a water outlet, the water inlet is arranged on the upper water jacket of the cylinder head, and the water outlet is arranged on the auxiliary water jacket of the cylinder body.

[0006] Furthermore, the upper water jackets of the cylinder heads in two adjacent water jacket units are interconnected, the cylinder body water jackets in two adjacent water jacket units are interconnected, and the cylinder body auxiliary water jackets in two adjacent water jacket units are interconnected.

[0007] Furthermore, the guide portion is arranged on an end of the upper water jacket of the cylinder head close to the water inlet, and the bottom of the guide portion extends upward from the end close to the water inlet and to the end away from the water inlet.

[0008] Furthermore, the lower water jacket of the cylinder head includes a connecting portion, a nose portion, and an extending portion, the connecting portion is connected to the upper water jacket of the cylinder head, the top of the nose portion is connected to the connecting portion, the bottom of the nose portion is connected to the extending portion, and the extending portion is connected to the cylinder body water jacket and the cylinder body auxiliary water jacket.

[0009] Furthermore, a through slot and four connecting arms are provided in the middle of the nose bridge, one end of the four connecting arms are connected and communicated with the slot arms of the through slot, and the other end of the four connecting arms are connected to the outer wall of the connecting part and communicated with the interior of the connecting part.

[0010] Furthermore, the four connecting arms divide the through groove into a first air inlet groove, a second air inlet groove, a first exhaust groove, and a second exhaust groove. The first air inlet groove and the second air inlet groove are arranged side by side on the side of the nose bridge close to the cylinder body auxiliary water jacket, and the first exhaust groove and the second exhaust groove are arranged side by side on the side of the nose bridge away from the cylinder body auxiliary water jacket.

[0011] Further, the extension portion includes an intake side extension portion and an exhaust side extension portion, the intake side extension portion is connected to the cylinder body secondary water jacket, and the exhaust side extension portion is connected to and communicated with the cylinder body water jacket.

[0012] Furthermore, a degassing port is provided on the upper water jacket of the cylinder head, and the degassing port and the water inlet are located at the same end of the upper water jacket of the cylinder head.

[0013] Furthermore, a water inlet is provided on the cylinder body auxiliary water jacket, and the water inlet and the water outlet are located on the same side of the cylinder body auxiliary water jacket.

[0014] Compared with the existing technology, the present invention has the following beneficial technical effects: The present invention provides an engine water jacket structure, which adopts a double-layer cylinder head water jacket structure consisting of an upper cylinder head water jacket and a lower cylinder head water jacket, and a cylinder body water jacket structure consisting of a cylinder body water jacket and a cylinder body auxiliary water jacket, and the water inlet is arranged on the cylinder head water jacket, and the water outlet is arranged on the cylinder body water jacket, so that the coolant can first cool the cylinder head with a higher temperature, and then cool the cylinder body with a lower temperature, thereby improving the cooling efficiency; the cylinder head upper water jacket adopts a horizontal arrangement scheme, which can effectively shorten the engine's intake and exhaust horizontal arrangement space size, making it more compact, so as to match more vehicle boundaries; the water jacket unit can realize the corresponding cooling of each cylinder separately, which can effectively reduce the flow resistance of the coolant and improve the cooling efficiency; adding a guide part to the cylinder head upper water jacket can make the coolant distribution more uniform and avoid the problem of insufficient cooling; by changing the thickness of the inner wall at the connection between the extension arm and the connection part, the flow distribution can be controlled, and the cooling effect of the key parts can be effectively guaranteed to be optimal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of an engine water jacket structure provided by the present invention.

[0016] Figure 2 The present invention provides a front view of an engine water jacket structure.

[0017] Figure 3 This is a rear view of an engine water jacket structure provided by the present invention.

[0018] Figure 4 The present invention provides a top view of an engine water jacket structure.

[0019] Figure 5 The present invention provides a side view of an engine water jacket structure.

[0020] Figure 6 It is a front view of the cylinder head water jacket in the present invention.

[0021] Figure 7 For the present invention Figure 6 A magnified view of the local structure.

[0022] Figure 8 It is a bottom view of the cylinder head water jacket in the present invention.

[0023] Fig. 9 It is a structural schematic diagram of the nose bridge portion in the present invention.

[0024] Among them: 10-water inlet; 20-water outlet; 30-water jacket unit; 31-cylinder head upper water jacket; 311-guide part; 32-cylinder head lower water jacket; 321-connecting part; 322-nose bridge; 322a-connecting arm; 322a1-first air inlet groove; 322a2-second air inlet groove; 322a3-first exhaust groove; 322a4-second exhaust groove; 323-extension part; 323a-inlet side extension part; 323b-exhaust side extension part; 33-cylinder water jacket; 34-cylinder auxiliary water jacket; 40-degassing port; 50-water intake. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated in the description is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred parts or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] See also Figure 1-5 The present invention provides an engine water jacket structure, comprising a water inlet 10, a water outlet 20, and a plurality of water jacket units 30. The plurality of water jacket units 30 are arranged side by side and are interconnected. The water inlet 10 and the water outlet 20 are located on the water jacket unit 30. The water jacket unit 30 comprises a cylinder head upper water jacket 31, a cylinder head lower water jacket 32, a cylinder body water jacket 33, and a cylinder body auxiliary water jacket 34. The cylinder head upper water jacket 31 is located above the cylinder head lower water jacket 32 ​​and is communicated with the cylinder head lower water jacket 32. The cylinder body water jacket 33 is located below the cylinder head lower water jacket 32 ​​and is communicated with the cylinder head lower water jacket 32. The cylinder body auxiliary water jacket 34 is located on one side of the cylinder body water jacket 33 and is communicated with the cylinder body water jacket 33. The cylinder head upper water jacket 31, the cylinder head lower water jacket 32, the cylinder body water jacket 33, and the cylinder body auxiliary water jacket 34 in the present invention are set on the periphery of the engine, wherein the water inlet 10 and the water outlet 20 are located on the outermost water jacket unit 30, which is convenient for connecting with the radiator, the water inlet 10 is connected to the water outlet pipe of the radiator, and the water outlet 20 is connected to the water inlet pipe of the radiator. The coolant flowing out of the radiator enters the cylinder head upper water jacket 31, the cylinder head lower water jacket 32, the cylinder body water jacket 33, and the cylinder body auxiliary water jacket 34 in the water jacket unit 30 in turn to provide cooling for the engine, and the heated liquid after cooling enters the radiator through the water outlet 20 to cool down, and then forms coolant to enter the water jacket unit 30, and circulates continuously. The number of water jacket units 30 can be determined according to the number of cylinders of the engine, that is, each cylinder is equipped with a water jacket unit, so the water jacket structure provided by the present invention can effectively reduce the flow resistance of the coolant and improve the cooling speed. It should be noted that the engines to which the water jacket structure provided by the present invention is applicable include but are not limited to methanol engines.

[0028] Specifically, each water jacket unit 30 is formed by casting, and a cavity structure is formed inside the cylinder head upper water jacket 31, the cylinder head lower water jacket 32, the cylinder body water jacket 33, and the cylinder body auxiliary water jacket 34, and the coolant flows in the cavity. The cylinder head upper water jacket 31 in two adjacent water jacket units 30 is connected to each other, the cylinder body water jacket 33 in two adjacent water jacket units 30 is connected to each other, and the cylinder body auxiliary water jacket 34 in two adjacent water jacket units 30 is connected to each other. The water inlet 10 is provided on the cylinder head upper water jacket 31 in the outermost water jacket unit 30 among the multiple water jacket units 30, so as to be connected to the water outlet pipe of the radiator, and the water outlet 20 is provided on the cylinder body auxiliary water jacket 34 in the outermost water jacket unit 30 among the multiple water jacket units 30, so as to be connected to the water inlet pipe of the radiator. Therefore, after the coolant enters from the water inlet 10, it can flow into each water jacket unit 30. The coolant in each water jacket unit 30 can flow in the cylinder head upper water jacket 31, the cylinder head lower water jacket 32, the cylinder body water jacket 33, and the cylinder body auxiliary water jacket 34 in sequence to cool down each corresponding cylinder body. The arrangement of multiple water jacket units 30 can effectively reduce the flow resistance of the coolant and increase the cooling speed.

[0029] Furthermore, a degassing port 40 is provided on the upper water jacket 31 of the cylinder head, and the degassing port 40 and the water inlet 10 are located at the same end of the upper water jacket 31 of the cylinder head. When water vapor is generated due to evaporation in the upper water jacket 31 of the cylinder head due to excessive temperature, the water vapor can be discharged from the degassing port 40 to avoid excessive pressure in the upper water jacket 31 of the cylinder head, which affects the cooling effect of the engine. A water intake port 50 is provided on the cylinder body auxiliary water jacket 34, and the water intake port 50 and the water outlet 20 are located on the same side of the cylinder body auxiliary water jacket 34. The water intake port 50 is connected to components such as heaters, EGR, and superchargers, and the water intake port 50 can meet the cooling and water intake needs of other components such as heaters, EGR, and superchargers.

[0030] Please also read Figure 6-8 The upper water jacket 31 of the cylinder head extends horizontally to cool the top of the cylinder head, and the lower water jacket 32 ​​of the cylinder head extends vertically to cool the bottom of the cylinder head; the bottom of the upper water jacket 31 of the cylinder head is connected to the top of the lower water jacket 2 of the cylinder head. The horizontal arrangement of the upper water jacket 31 of the cylinder head can effectively shorten the lateral size of the engine on the intake and exhaust sides, making it more compact so as to match more vehicle models; the end of the upper water jacket 31 of the cylinder head close to the water inlet 10 is provided with a guide part 311, and the bottom of the guide part 311 extends upward from the end close to the water inlet 10 and to the end away from the water inlet 10, that is, the inner cavity diameter of the guide part 311 gradually decreases from the end close to the water inlet 10 to the end away from the water inlet 10. The function of the guide part 311 is that when the coolant enters from the water inlet 10, the coolant is first pushed to the connection point between the upper water jacket 31 of the cylinder head and the lower water jacket 32 ​​of the cylinder head by the action of the guide part 311, and then redistributed there. Under the action of gravity, part of the coolant flows to the lower water jacket 32 ​​of the cylinder head, and under the thrust after more coolant enters, part of the coolant flows to the adjacent water jacket unit 30. If the guide part 311 is not provided, the coolant entering from the water inlet 10 will first flow to the lowest point, and cannot all flow to the connection point between the upper water jacket 31 of the cylinder head and the lower water jacket 32 ​​of the cylinder head, and enter the lower water jacket 32 ​​of the cylinder head or the adjacent water jacket unit 30 at the maximum flow rate, which is easy to form a dead zone, affecting the cooling speed and effect of the engine. Therefore, the guide part 311 can play a role in uniformly distributing the coolant.

[0031] Please also read Fig. 9 The lower water jacket 32 ​​of the cylinder head extends vertically to cool the bottom of the cylinder head; the lower water jacket 32 ​​of the cylinder head includes a connecting portion 321, a nose bridge portion 322, and an extending portion 323.

[0032] Among them, there are two connecting parts 321, which are cylindrical structures and are arranged vertically side by side. The two connecting parts 321 are connected to the upper water jacket 31 of the cylinder head. The two first connecting parts 321 are respectively sleeved on the outer periphery of the spark plug and the injector, which can cool the spark plug and the injector. The two first connecting parts 321 are connected to the upper water jacket 31 of the cylinder head.

[0033] Furthermore, the top of the nose bridge portion 322 is communicated with the connecting portion 321, the bottom of the nose bridge portion 322 is communicated with the extension portion 323, and the extension portion 323 is connected to the cylinder water jacket 33 and the cylinder auxiliary water jacket 34. A through slot and four connecting arms 322a are provided in the middle of the nose bridge portion 322, one end of the four connecting arms 322a is connected to the slot arm of the through slot and communicated with the inside of the through slot, and the other end of the four connecting arms 322a is connected to the outer wall of the connecting portion 321 and communicated with the inside of the connecting portion 321. The four connecting arms 322a divide the through groove into a first air intake groove 322a1, a second air intake groove 322a2, a first exhaust groove 322a3, and a second exhaust groove 322a4. The first air intake groove 322a1 and the second air intake groove 322a2 are arranged side by side on the side of the nose bridge 322 close to the cylinder body auxiliary water jacket 34. The first air intake groove 322a1 and the second air intake groove 322a2 are sleeved on the intake valve to cool the intake valve; the first exhaust groove 322a3 and the second exhaust groove 322a4 are arranged side by side on the side of the nose bridge 322 away from the cylinder body auxiliary water jacket 34. The first exhaust groove 322a3 and the second exhaust groove 322a4 are sleeved on the exhaust valve to cool the exhaust valve. Since the four extension arms 322a are connected to the outer wall of the connecting part 321 and are connected to the interior of the connecting part 32, the flow rate and flow rate of the coolant flowing to the nose bridge part 322 can be improved by improving the thickness of the inner wall at the connection between the four extension arms 322a and the connecting part 321. Specifically, according to the needs of cooling the spark plugs, injectors, intake valves and exhaust valves, the thickness of the inner wall at the four extension arms 322a and the connecting part 321 can be reasonably determined, and the flow rate and flow rate of the coolant in the connecting part 321 and the extension arms 322a can be reasonably allocated, thereby improving the cooling effect of key parts of the engine.

[0034] Further, the extension part 323 includes an intake side extension part 323a and an exhaust side extension part 323b, wherein the intake side extension part 323a is connected to the cylinder body auxiliary water jacket 34 but not in communication, and the exhaust side extension part 323b is connected to and in communication with the cylinder body water jacket 33. That is, the coolant flows in from the water inlet 10, then enters the cylinder head upper water jacket 31, and is evenly distributed to the cylinder body lower water jacket 32 ​​and the adjacent water jacket unit 30 through the action of the guide part 311, and the flow is correspondingly distributed through the action of the four extension arms 322a with different inner wall thicknesses, and then uniformly flows to the cylinder body water jacket 33.

[0035] Specifically, the cylinder water jacket 33 is a cylindrical structure for cooling the cylinder. One side of the cylinder water jacket 33 is connected to the exhaust side extension 323b, and the other side is connected to the cylinder auxiliary water jacket 34. The cylinder auxiliary water jacket 34 is connected to the cylinder auxiliary water jacket 34 in the adjacent water jacket unit 30; therefore, the coolant in the cylinder water jacket 33 can be completely concentrated in the cylinder auxiliary water jacket 34, and then flow out through the water outlet 20 on the cylinder auxiliary water jacket 34. The setting of the cylinder auxiliary water jacket 34 can concentrate the coolant after the engine is cooled and increase the discharge speed of the coolant.

[0036] From the above description, it can be known that the engine water jacket structure provided by the present invention adopts a double-layer cylinder head water jacket structure consisting of a cylinder head upper water jacket 31 and a cylinder head lower water jacket 32, and a cylinder body water jacket structure consisting of a cylinder body water jacket 33 and a cylinder body auxiliary water jacket 34, and the water inlet 10 is arranged on the cylinder head water jacket, and the water outlet 20 is arranged on the cylinder body water jacket, so that the coolant can first cool the cylinder head with a higher temperature and then cool the cylinder body with a lower temperature, thereby improving the cooling efficiency; the cylinder head upper water jacket 32 ​​adopts a horizontal arrangement scheme, which can effectively shorten the lateral size of the engine on the intake and exhaust sides, making it more compact so as to match more vehicle models; the water jacket unit 30 can realize the corresponding cooling of each cylinder separately, effectively reduce the flow resistance of the coolant, and improve the cooling efficiency; adding a guide part 311 to the cylinder head upper water jacket 31 can make the coolant distribution more uniform and avoid the problem of insufficient cooling; by changing the thickness of the inner wall at the connection between the extension arm 322a and the connecting part 321, the flow distribution can be controlled, and the cooling effect of key parts can be effectively guaranteed to be optimal.

[0037] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An engine water jacket structure, characterized in that: The invention comprises a plurality of water jacket units (30) arranged side by side and interconnected, wherein the water jacket unit (30) comprises a cylinder head upper water jacket (31), a cylinder head lower water jacket (32), a cylinder body water jacket (33), and a cylinder body auxiliary water jacket (34); the cylinder head upper water jacket (31) is arranged to extend transversely and is located above the cylinder head lower water jacket (32); a guide portion (311) is provided on the cylinder head upper water jacket (31); the cylinder head lower water jacket (32) is arranged to extend vertically and is connected to the cylinder head upper water jacket (32); the cylinder body water jacket (33) is located below the cylinder head lower water jacket (32) and is connected to the cylinder head lower water jacket (32); and the cylinder body auxiliary water jacket (34) is located on one side of the cylinder body water jacket (33) and is connected to the cylinder body water jacket (33).

2. The engine water jacket structure according to claim 1, characterized in that: It also comprises a water inlet (10) and a water outlet (20), wherein the water inlet (10) is arranged on the upper water jacket (31) of the cylinder head, and the water outlet (20) is arranged on the secondary water jacket (34) of the cylinder body.

3. The engine water jacket structure according to claim 1, characterized in that: The cylinder head upper water jackets (31) in two adjacent water jacket units (30) are interconnected, the cylinder body water jackets (33) in two adjacent water jacket units (30) are interconnected, and the cylinder body auxiliary water jackets (34) in two adjacent water jacket units (30) are interconnected.

4. The engine water jacket structure according to claim 2, characterized in that: The guide portion (311) is arranged on an end of the upper water jacket (31) of the cylinder head close to the water inlet (10), and the bottom of the guide portion (311) extends upward from the end close to the water inlet (10) and towards the end away from the water inlet (10).

5. The engine water jacket structure according to claim 1, characterized in that: The cylinder head lower water jacket (32) comprises a connecting portion (321), a nose bridge portion (322), and an extension portion (323); the connecting portion (321) is in communication with the cylinder head upper water jacket (31); the top of the nose bridge portion (322) is in communication with the connecting portion (321); the bottom of the nose bridge portion (322) is in communication with the extension portion (323); and the extension portion (323) is connected to the cylinder body water jacket (33) and the cylinder body auxiliary water jacket (34).

6. The engine water jacket structure according to claim 5, characterized in that: A through slot and four connecting arms (322a) are provided in the middle of the nose bridge portion (322), one end of the four connecting arms (322a) being connected to and in communication with the slot arms of the through slot, and the other end of the four connecting arms (322a) being connected to the outer wall of the connecting portion (321) and in communication with the interior of the connecting portion (321).

7. The engine water jacket structure according to claim 6, characterized in that: The four connecting arms (322a) divide the through groove into a first air intake groove (322a1), a second air intake groove (322a2), a first air exhaust groove (322a3), and a second air exhaust groove (322a4); the first air intake groove (322a1) and the second air intake groove (322a2) are arranged side by side on a side of the nose bridge (322) close to the cylinder body auxiliary water jacket (34); and the first air exhaust groove (322a3) and the second air exhaust groove (322a4) are arranged side by side on a side of the nose bridge (322) away from the cylinder body auxiliary water jacket (34).

8. The engine water jacket structure according to claim 6, characterized in that: The extension portion (323) comprises an intake side extension portion (323a) and an exhaust side extension portion (323b); the intake side extension portion (323a) is connected to the cylinder body secondary water jacket (34); and the exhaust side extension portion (323b) is connected to and communicates with the cylinder body water jacket (33).

9. The engine water jacket structure according to claim 1, characterized in that: The cylinder head upper water jacket (31) is provided with a degassing port (40), and the degassing port (40) and the water inlet (10) are located at the same end of the cylinder head upper water jacket (31).

10. The engine water jacket structure according to claim 1, characterized in that: The cylinder body auxiliary water jacket (34) is provided with a water intake port (50), and the water intake port (50) and the water outlet port (20) are located on the same side of the cylinder body auxiliary water jacket (34).

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