Engine body with cooling structure and engine

Abstract

The application discloses a machine body with a cooling structure and an engine, relates to the technical field of engine cooling, and comprises a cylinder body with a plurality of cylinder holes on two sides; a cooling cavity for mounting an oil cooler is formed between the two-side cylinder holes, the cooling cavity is provided with a main liquid inlet, and a fluid channel for cooling liquid flow is formed between the oil cooler and the inner wall of the cooling cavity; a first water jacket cavity in communication with the cooling cavity is formed on one side of the cooling cavity and surrounds the outer periphery of the cylinder hole; and a second water jacket cavity in communication with the cooling cavity is formed on the other side of the cooling cavity and surrounds the outer periphery of the cylinder hole; the arrangement of the water distribution cavity is omitted, the design without the water distribution cavity is realized, the weight of the machine body and the whole engine can be reduced, the strength and stability of the sand core are enhanced, and the casting process is improved; the cooling structure is built-in, so that the water jacket flow rate and the uniformity of water flow among the cylinders are improved, and the cylinder holes are uniformly cooled in the circumferential direction.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engine cooling, and particularly relates to a body with a cooling structure and an engine. BACKGROUND

[0002] The cylinder liner of an engine supports the reciprocating motion of a piston and, together with a cylinder head and the piston, constitutes a working space of a cylinder. The cylinder liner is divided into a wet cylinder liner and a dry cylinder liner; the wall thickness of the wet cylinder liner is generally 5-8 mm, and the outer surface thereof directly contacts cooling liquid; the wall thickness of the dry cylinder liner is 2-3 mm, and the dry cylinder liner does not contact the cooling liquid. When the dry cylinder liner is used, in order to enable the cylinder liner to transmit the heat of the piston assembly and itself to cooling water and enable the working temperature to be appropriate, two water distribution modes are generally used:

[0003] The first mode is to externally connect a water inlet pipe. In this mode, a separate water inlet pipe needs to be used, and the number of components is large, for example, components such as a water inlet pipe, a rubber ring, a gasket and a bolt are needed, and there are many sealing failure points. Because the separate water inlet pipe means that a water jacket core head needs to be designed to be connected to the water inlet pipe for each cylinder, in addition to the failure of the rubber ring or the gasket, the risk of water jacket core floating also needs to be considered. This risk is generally not easy to detect and is found only during assembly or subsequent test running, thereby affecting the production rhythm and being not conducive to the safe operation of production and vehicles.

[0004] The second mode is to use a water distribution cavity of a body to realize water inlet, and therefore a separate water distribution cavity sand core needs to be added during the design of casting, the core assembly process is more complicated, the casting production is difficult, and a special sand cleaning hole needs to be designed for the convenience of cleaning, which can cause leakage points. In addition to the necessary cavity area of the water distribution cavity, a separate core head needs to be designed at the front and rear ends of the sand core as a fixed support during core assembly, which can cause the occupation of the space of the engine and is not conducive to the arrangement of the whole machine. For example, the space of a transverse engine power device is insufficient and is biased to one side, which can cause the speed difference of front wheels and the swing of a vehicle head to the left and right, the driving space of a longitudinal engine is lost, and the safe operation of the whole vehicle is further affected. SUMMARY

[0005] The application provides a body with a cooling structure and an engine to solve the above technical problems, that is, the separate water inlet pipe causes the large number of components and many sealing failure points, the separate water distribution cavity causes the complicated core assembly process, the casting production is difficult, and the separate core head needs to be designed at the front and rear ends of the sand core as a fixed support during core assembly, which can cause the occupation of the space of the engine.

[0006] The technical scheme adopted by the application is as follows:

[0007] A machine body with a cooling structure, characterized in that it comprises a cylinder body with a plurality of cylinder bores on both sides; a cooling cavity for mounting an oil cooler is formed between the cylinder bores on both sides, the cooling cavity has a main liquid inlet; a fluid passage for cooling liquid flow is formed between the oil cooler and the inner wall of the cooling cavity; a first water jacket cavity is formed on one side of the cooling cavity around the outer periphery of the cylinder bore and is connected to the cooling cavity; a second water jacket cavity is formed on the other side of the cooling cavity around the outer periphery of the cylinder bore and is connected to the cooling cavity.

[0008] The machine body with a cooling structure of the present application also has the following additional technical features:

[0009] The cooling cavity is provided with a first distribution port for connecting the first water jacket cavity and the fluid passage, and a second distribution port for connecting the second water jacket cavity and the fluid passage; a first limiting band is connected to one side of the cooling cavity close to the main liquid inlet, and a second limiting band is connected to one side of the cooling cavity close to the second distribution port; the first limiting band and the second limiting band can guide the cooling liquid to flow along the outer periphery of the oil cooler to cool the oil inside the oil cooler.

[0010] A coordination cavity is formed on one side of the cooling cavity opposite the main liquid inlet, which can evenly distribute the cooling liquid entering the first water jacket cavity and the second water jacket cavity; the width of the coordination cavity is not less than the width of the first distribution port or the width of the second distribution port.

[0011] The first water jacket cavity is provided with a first liquid inlet connected to the first distribution port, a first guide passage is formed between the first distribution port and the first liquid inlet, a slope with a preset angle is formed between the first guide passage and the main liquid inlet, and a transition fillet is formed between the first guide passage and the first water jacket cavity.

[0012] The first water jacket cavity has a plurality of first water passing cavities connected side by side; a first inter-cylinder water blocking wall is formed on one side of the two adjacent first water passing cavities towards the inside of the machine body, one side of the first inter-cylinder water blocking wall is provided with a first water string hole capable of allowing cooling liquid to flow between the plurality of first water passing cavities; a first inter-cylinder distribution port is formed on one side of the two adjacent first water passing cavities towards the outside of the machine body.

[0013] The first water passing cavity is provided with a plurality of first upper liquid holes protruding from the end of the first water passing cavity on one side towards the outside of the machine body, and the cooling liquid can flow towards the cylinder head through the first upper liquid holes.

[0014] The bottom wall of the first inter-cylinder distribution port is located at a height of at least more than one half of the height of the first water jacket cavity; the slope formed between the first guide passage and the main liquid inlet has a value in the range of 15°-30°; and the transition fillet formed between the first guide passage and the first water jacket cavity has a value not less than 15mm.

[0015] The bottom wall of the cooling cavity is located at a height that is flush with the bottom wall of the first distribution port and the second distribution port, or the bottom wall of the cooling cavity is located at a height that is not lower than the bottom wall of the first distribution port and the second distribution port.

[0016] The bottom wall of the cooling cavity is located at a height that is flush with the bottom wall of the main liquid inlet, or the bottom wall of the cooling cavity is located at a height that is not lower than the bottom wall of the main liquid inlet.

[0017] The application also relates to an engine comprising the engine body with the cooling structure.

[0018] The engine body is a sleeveless engine body comprising a cylinder body with a plurality of cylinder holes on both sides, and the inner wall of the cylinder hole is not connected with a sleeve.

[0019] Thanks to the above technical solutions, the application has the following beneficial effects:

[0020] 1. A machine body with a cooling structure, comprising a cylinder body, the cylinder body having a plurality of cylinder bores on both sides; a cooling cavity with a main liquid inlet is formed between the cylinder bores for mounting an oil cooler; the cooling cavity of the mounted oil cooler serves as a cavity that can flow to the first water jacket cavity and the second water jacket cavity on both sides of the cooling cavity, thereby omitting the arrangement of the water distribution cavity, thereby avoiding the need to separately increase the water distribution cavity sand core in the casting process, the core assembly process is complex and difficult, and the sand core cleaning hole is additionally increased, thereby avoiding the increase in the number of leakage points, avoiding the additional core head for fixing and supporting the sand core due to the arrangement of the water distribution cavity sand core at the front and rear ends of the sand core, thereby saving the space of the entire machine arrangement and improving the safe operation of the engine; the cooling cavity can replace the water distribution cavity, so that a fluid passage for the flow of cooling liquid is formed between the oil cooler and the inner wall of the cooling cavity; the cooling liquid enters the fluid passage through the main liquid inlet, and then is divided into two paths, one path enters the first water jacket cavity on one side of the cooling cavity around the outer periphery of the cylinder bore through the first liquid outlet; the other path enters the second water jacket cavity on the other side of the cooling cavity around the outer periphery of the cylinder bore through the second liquid outlet; thereby achieving balanced cooling of each cylinder in the machine body, by opening the first water jacket cavity and the second water jacket cavity inside the machine body, the cooling structure is built-in, thereby improving the water jacket flow rate and the uniformity of water flow between the cylinders, and forcibly cooling the cylinder bore circumferentially uniformly; and opening the cooling cavity, the first water jacket cavity and the second water jacket cavity inside the machine body, realizing the design without water distribution cavity, which can reduce the weight of the machine body and the entire engine, enhance the strength and stability of the sand core, and improve the casting process.

[0021] 2. As a preferred embodiment of the present application, a first limiting band is connected to one side of the cooling cavity close to the main liquid inlet, and a second limiting band is connected to one side of the cooling cavity close to the second liquid outlet; the first limiting band and the second limiting band can guide the cooling liquid to flow around the outer periphery of the oil cooler to cool the oil inside the oil cooler.

[0022] The purpose of arranging the first limiting band and the second limiting band on both sides in the cooling cavity is to enable the cooling liquid to be forcibly cooled around the oil cooler under the guidance of the first limiting band and the second limiting band. Because the cooling liquid can be forced to flow around the outer periphery of the oil cooler in the cooling cavity under the blocking action of the first limiting band and the second limiting band, the uniform distribution around the outer periphery of the oil cooler can be further achieved, and the oil inside the oil cooler can be further fully cooled.

[0023] 3. As a preferred embodiment of the present application, a coordination cavity is formed on one side of the cooling cavity corresponding to the main liquid inlet, the coordination cavity can evenly distribute the cooling liquid entering the first water jacket cavity and the second water jacket cavity; the width of the coordination cavity is not less than the width of the first liquid outlet or the width of the second liquid outlet.

[0024] The purpose of the coordination cavity is to be able to balance the cooling liquid in the first water jacket cavity and the second water jacket cavity, so that the flow of the cooling liquid flowing to the first water jacket cavity and the cooling liquid flowing to the second water jacket cavity is balanced, so the width of the coordination cavity cannot be too narrow, and needs to have a certain width or a certain cross-sectional area, which is similar to the width of the first distribution port or the second distribution port, and at least cannot be lower than the width of the first distribution port or the second distribution port, so that the cooling liquid flowing through the coordination cavity can further balance the cooling liquid of the first distribution port and the second distribution port, and can play a role in balancing the water distribution to a certain extent, and improve the efficiency of pressure stabilization.

[0025] 4. As a preferred embodiment of the present application, the first water jacket cavity is provided with a first liquid inlet communicated with the first distribution port, and the first distribution port and the first liquid inlet are connected to form a first guide passage, and the first guide passage and the main liquid inlet form a slope with a preset angle, and the first guide passage and the first water jacket cavity form a transition fillet.

[0026] In order to make the cooling liquid in the cooling cavity enter the first water jacket cavity or the second water jacket cavity to sufficiently cool the upper cylinder head part, a certain slope is formed between the first distribution port and the first liquid inlet, and the angle is preferably 15°-30°, which can play a good cooling effect.

[0027] 5. As a preferred embodiment of the present application, the height of the bottom wall of the cooling cavity can be flush with the height of the bottom wall of the first distribution port and the second distribution port; or the height of the bottom wall of the cooling cavity can be not lower than the height of the bottom wall of the first distribution port and the second distribution port.

[0028] The bottom wall of the main liquid inlet is higher than the bottom wall of the first distribution port and the second distribution port, so that the liquid level of the cooling liquid entering from the main liquid inlet is higher than the liquid level of the cooling liquid distributed to the first distribution port and the second distribution port, thereby increasing the flow pressure of the liquid, so that the cooling liquid can flow in the flow passage after entering the cooling cavity from the main liquid inlet, enhancing the flow performance of the cooling liquid, and further flowing the cooling liquid from the main liquid inlet towards the first distribution port and the second distribution port, so that the cooling liquid can be completely discharged, achieving sufficient cooling. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 It is a structure schematic view of a water jacket sand core for casting a body with a cooling structure according to an embodiment of the present application.

[0031] Figure 2 A front view structural schematic diagram of a first water jacket cavity sand core of a water jacket sand core for casting a body with a cooling structure according to an embodiment of the present application;

[0032] Figure 3 A top view structural schematic diagram of a first water jacket cavity sand core of a water jacket sand core for casting a body with a cooling structure according to an embodiment of the present application;

[0033] Figure 4 A left side sectional view structural schematic diagram of a first water jacket cavity sand core of a water jacket sand core for casting a body with a cooling structure according to an embodiment of the present application;

[0034] Figure 5 A sectional view structural schematic diagram of a single cylinder water jacket sand core of a water jacket sand core for casting a body with a cooling structure according to an embodiment of the present application;

[0035] In the figure,

[0036] 1, oil cooler installation position; 2, cooling cavity; 3, main liquid inlet; 4, first water jacket cavity; 5, second water jacket cavity; 6, first liquid distribution port; 7, second liquid distribution port; 8, first limiting belt; 9, second limiting belt; 10, coordination cavity; 11, first guide passage; 12, second guide passage; 13, first water passing cavity; 14, second water passing cavity; 15, first inter-cylinder water blocking wall; 16, first water leakage hole; 17, first inter-cylinder liquid distribution port; 18, first liquid upward hole; 19, second liquid upward hole; 20, first liquid inlet;

[0037] θ, a slope with a preset angle is formed between the first guide passage and the main liquid inlet;

[0038] R, a transition fillet is formed between the first guide passage and the first water jacket cavity;

[0039] L, cylinder hole height;

[0040] l- Height of the single cylinder water jacket sand core;

[0041] l 1- Thickness of the top plate of the top of the single cylinder water jacket sand core. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be explicitly described or illustrated herein.

[0044] In addition, in the description of the present application, it needs to be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description referring to the terms "embodiment", "example", "one embodiment", "exemplary" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The present application relates to a cylinder with a cooling structure, as shown in Figures 1-5 As shown, it comprises a cylinder body, the cylinder body has a plurality of cylinder holes on both sides; a cooling cavity 2 with a main liquid inlet 3 is formed between the cylinder holes, the center of the cooling cavity 2 has an oil cooler mounting position 1 for mounting an oil cooler, a fluid passage for cooling liquid flow is formed between the oil cooler and the inner wall of the cooling cavity 2; a first water jacket cavity 4 is opened around the outer periphery of the cylinder hole on one side of the cooling cavity 2, the cooling cavity 2 is provided with a first distribution port 6 for communicating the first water jacket cavity 4 with the fluid passage; a second water jacket cavity 5 is opened around the outer periphery of the cylinder hole on the other side of the cooling cavity 2, the cooling cavity 2 is provided with a second distribution port 7 for communicating the second water jacket cavity 5 with the fluid passage.

[0048] The engine body with a cooling structure of the present application is formed with a cooling cavity in the middle for storing cooling liquid, and first and second water jacket cavities capable of realizing cooling liquid flowing space are arranged on both sides of the cooling cavity, so that the whole can be in V-shaped, H-shaped or other structures, preferably in V-shaped structure, the position of the whole cooling cavity in the middle for storing cooling liquid is close to the lower side of the first and second water jacket cavities on both sides, which is beneficial to the uniform cooling of the cooling liquid in the cooling cavity first and then flowing to the first and second water jacket cavities;

[0049] The cylinder body has a plurality of cylinder holes on both sides; a cooling cavity 2 with a main liquid inlet 3 for installing an oil cooler is formed between the cylinder holes, and the cooling cavity 2 for installing the oil cooler serves as a cavity capable of flowing to the first and second water jacket cavities 4 and 5 on both sides of the cooling cavity 2, thereby omitting the arrangement of the water distribution cavity, avoiding the increase of the leakage points caused by the separate increase of the sand core sand core hole for cleaning the sand core in the casting process, and avoiding the increase of the core head for fixing and supporting the sand core at the front and rear ends of the sand core due to the arrangement of the water distribution cavity sand core, thereby saving the space of the whole machine and improving the safe operation of the engine;

[0050] The cooling cavity 2 of the present application can replace the water distribution cavity, thereby omitting the water distribution cavity, and the cooling cavity 2 can realize the formation of a cooling liquid flowing fluid passage between the oil cooler and the inner wall of the cooling cavity 2 in addition to accommodating the oil cooler; the flow path of the cooling liquid into the cooling cavity 2 is as follows: the cooling liquid enters the fluid passage through the main liquid inlet 3, and then is divided into two paths, one path enters the first water jacket cavity 4 on one side of the cooling cavity 2 around the outer periphery of the cylinder hole through the first liquid distribution port 6; the other path enters the second water jacket cavity 5 on the other side of the cooling cavity 2 around the outer periphery of the cylinder hole through the second liquid distribution port 7; thereby realizing the balanced cooling of each cylinder in the engine body, by opening the first and second water jacket cavities 4 and 5 in the engine body, realizing the built-in cooling structure, thereby improving the water jacket flow rate and the uniformity of the water flow between the cylinders, and forcibly cooling the cylinder holes uniformly in the circumferential direction; and opening the cooling cavity 2, the first and second water jacket cavities 4 and 5 in the engine body realizes the design without water distribution cavity, which can reduce the weight of the engine body and the whole engine, enhance the strength and stability of the sand core, and improve the casting process.

[0051] The traditional oil cooler is arranged outside the engine body, and in the present application, the position originally required for storing the oil cooler is designed inside the engine body and between the two side cylinder holes, and a cooling cavity for containing the cooling liquid is formed in the cavity where the oil cooler is arranged; no additional water distribution cavity is required, which simplifies the structure, makes the entire engine more compact, and can also enhance the rapid flow of the cooling liquid to the surroundings of each cylinder hole on both sides, achieving uniform cooling.

[0052] As shown in Figure 1 the water jacket sand core forming the cooling structure of the present application needs to be placed in the sand box during the casting process, the sand mold and the water jacket sand core are combined together according to the requirements to complete the casting mold, and then pouring is carried out in the sand box, that is, the liquid metal is filled into the casting mold, and the casting needs to be shaken out after cooling to a certain extent in the sand mold, and the qualified engine body is obtained after the sand core is taken out. At this time, the position originally occupied by the water jacket sand core in the engine body forms a cooling cavity 2, a first water jacket cavity 4 and a second water jacket cavity 5, so that a water jacket-free cavity structure is formed in the engine body, and the cooling liquid flows in the cooling cavity 2, the first water jacket cavity 4 and the second water jacket cavity 5 to achieve sufficient cooling of the engine body. Since the first water jacket cavity 4 and the second water jacket cavity 5 are formed in the engine body in the present application, the setting of the traditional water jacket and the water distribution cavity is avoided, so that the wall thickness of the engine in the region without the water jacket setting is reduced, thereby achieving the effect of weight reduction.

[0053] As shown in Figure 2 one side of the water jacket sand core forms a first water jacket cavity sand core for making the first water jacket cavity 4, and the other side of the water jacket sand core forms a second water jacket cavity sand core for making the second water jacket cavity 5.

[0054] As a preferred embodiment, the cooling cavity 2 is provided with a first distribution port 6 for connecting the first water jacket cavity 4 with the fluid channel, and a second distribution port 7 for connecting the second water jacket cavity 5 with the fluid channel; a first limiting belt 8 is connected to one side of the cooling cavity 2 close to the main liquid inlet 3, and a second limiting belt 9 is connected to one side of the cooling cavity 2 close to the second distribution port 7; the first limiting belt 8 and the second limiting belt 9 can guide the cooling liquid to flow around the outer periphery of the oil cooler to cool the oil inside the oil cooler.

[0055] The purpose of arranging the first limiting belt 8 and the second limiting belt 9 on both sides in the cooling cavity 2 is to enable the cooling liquid to be guided by the first limiting belt 8 and the second limiting belt 9 to flow around the outer periphery of the oil cooler to fully cool the oil cooler. Because the cooling liquid can be forced to flow around the outer periphery of the oil cooler in the cooling cavity 2 under the blocking action of the first limiting belt 8 and the second limiting belt 9, the uniform distribution of the cooling liquid around the outer periphery of the oil cooler can be further achieved, and the oil inside the oil cooler can be further cooled.

[0056] As a preferred embodiment, a coordination cavity 10 is formed on one side of the corresponding main liquid inlet 3 in the cooling cavity 2, which can balance the distribution of the cooling liquid into the first water jacket cavity 4 and the second water jacket cavity 5; the width of the coordination cavity 10 is not less than the width of the first liquid outlet 6 or the width of the second liquid outlet 7.

[0057] The purpose of the coordination cavity 10 is to balance the cooling liquid in the first water jacket cavity 4 and the second water jacket cavity 5, so that the flow of the cooling liquid flowing into the first water jacket cavity 4 and the second water jacket cavity 5 is balanced, so the width of the coordination cavity 10 cannot be too narrow, and needs to have a certain width or a certain cross-sectional area, which is similar to the width of the first liquid outlet 6 or the second liquid outlet 7, at least cannot be lower than the width of the first liquid outlet 6 or the second liquid outlet 7, so that the cooling liquid flowing through the coordination cavity 10 can further balance the distribution of the cooling liquid to the first liquid outlet 6 and the second liquid outlet 7, and can play a role in balancing the water distribution to a certain extent, and improve the efficiency of pressure stabilization.

[0058] Further, the first water jacket cavity 4 is provided with a first liquid inlet 20 communicating with the first liquid outlet 6, and an inclined first guide passage 11 is formed between the first liquid outlet 6 and the first liquid inlet 20, so that a slope with a preset angle is formed between the first guide passage 11 and the main liquid inlet 3, and further, the slope with a preset angle between the first guide passage 11 and the main liquid inlet 3 is 15°-30°.

[0059] The second water jacket cavity 5 is provided with a second liquid inlet communicating with the second liquid outlet 7, and an inclined second guide passage 12 is formed between the second liquid outlet 7 and the second liquid inlet, so that a slope with a preset angle θ is formed between the second guide passage 12 and the main liquid inlet 3, and further, the slope with a preset angle θ between the second guide passage 12 and the main liquid inlet 3 is 15°-30°.

[0060] In order to make the cooling liquid in the cooling cavity 2 enter the first water jacket cavity 4 or the second water jacket cavity 5 to fully cool the upper cylinder head part, a certain slope is formed between the first liquid outlet 6 and the first liquid inlet 20, and the angle is preferably 15°-30°, which can achieve good cooling effect.

[0061] As a preferred embodiment, the first water jacket cavity 4 has a plurality of first water passing cavities 13 connected side by side; a first inter-cylinder water blocking wall 15 is formed on the side of the two adjacent first water passing cavities 13 towards the inside of the machine body, and a first water string hole 16 is formed on one side of the first inter-cylinder water blocking wall 15, which can flow the cooling liquid between the plurality of first water passing cavities 13; a first inter-cylinder liquid outlet 17 is formed on the side of the two adjacent first water passing cavities 13 towards the outside of the machine body;

[0062] Further, the second water jacket cavity 5 has a plurality of second water passing cavities 14 connected side by side; a second inter-cylinder water blocking wall is formed on the side of the second water passing cavities 14 towards the inside of the cylinder block; the second inter-cylinder water blocking wall has a second water string hole capable of allowing the cooling liquid to flow between the plurality of second water passing cavities 14; a second inter-cylinder distribution port is formed on the side of the second water passing cavities 14 towards the outside of the cylinder block.

[0063] As shown in Figure 3 and Figure 4 , since the first inter-cylinder water blocking wall 15 and the second inter-cylinder water blocking wall have the same structure, the first inter-cylinder water blocking wall 15 is taken as an example for detailed description. A through hole is formed between the plurality of first water passing cavities 13. Since the through hole is on the water jacket sand core, a solid structure of the inside of the cylinder block, i.e. the first inter-cylinder water blocking wall 15, is formed at the position of the through hole after casting. The purpose of arranging the first inter-cylinder water blocking wall 15 is to make the flow of the cooling liquid between the first water passing cavities 13 more uniform, so that the cooling liquid can be uniformly cooled in the circumferential direction of the cavity wall of the first water passing cavities 13 under the distribution of the first inter-cylinder water blocking wall 15, the flow pressure of the cooling liquid is enhanced, and especially the long path area is forcedly cooled. Therefore, the first inter-cylinder water blocking wall 15 is arranged between the first water passing cavities 13 on the opposite side of the first distribution port 6, and the first inter-cylinder water blocking wall 15 can enhance the rigidity of the cylinder head, improve the sealing reliability of the cylinder gasket, and reduce the deformation of the cylinder hole.

[0064] As shown in Figure 3 and Figure 4 , since the first inter-cylinder distribution port 17 and the second inter-cylinder distribution port have the same structure, the first inter-cylinder distribution port 17 is taken as an example for description. The first inter-cylinder distribution port 17 is further formed between the first water passing cavities 13. The cooling liquid enters the first inter-cylinder distribution port 17 from the first distribution port 6 and then enters the first inter-cylinder distribution port 17 through the first liquid inlet 20, and flows between the plurality of first water passing cavities 13 through the first inter-cylinder distribution port 17, thereby further improving the circumferential uniform cooling of the cooling liquid between the plurality of first water passing cavities 13.

[0065] As shown in Figure 4 , since the first water string hole 16 and the second water string hole have the same structure, the first water string hole 16 is taken as an example for description. The first water string hole 16 is further connected between the bottoms of the plurality of first water passing cavities 13. The purpose is to make the cooling liquid sufficiently flow between the plurality of first water passing cavities 13 to be fully drained, thereby avoiding the phenomenon that the cooling liquid is unable to be drained and is retained at the bottom of the first water passing cavities 13, so that the bottoms of the first water passing cavities 13 are connected in series, the cooling liquid is gathered and then discharged outward together, the leakage points of the first water passing cavities 13 are reduced, and the leakage of the cooling liquid due to the failure to be discharged in time is prevented.

[0066] Further, the first water passage 13 is provided with a plurality of first upper liquid holes 18 protruding from the end of the first water passage 13 on the side facing the outside of the engine block, and the cooling liquid can flow towards the cylinder head through the first upper liquid holes 18; in addition, the second water passage 14 is provided with a plurality of second upper liquid holes 19 protruding from the end of the second water passage 14 on the side facing the outside of the engine block, and the cooling liquid can flow towards the cylinder head through the second upper liquid holes 19.

[0067] As shown in Figure 3 , the first upper liquid hole 18 and the second upper liquid hole 19 are the same structure, and the first upper liquid hole 18 is taken as an example for description, at least one first upper liquid hole 18 is arranged on the top of each first water passage 13, and the cooling liquid in the first water passage 13 can flow upwards through the first upper liquid hole 18, and the cooling liquid can flow upwards through the first upper liquid hole 18 to cool the cylinder head on the upper part of the engine block.

[0068] As shown in Figure 5 , the sand core structure of the first water passage 13 in the first water jacket cavity 4 or the second water passage 14 in the second water jacket cavity 5 is shown, which is a single-cylinder water jacket sand core, the cylinder hole height L, the height of the single-cylinder water jacket sand core is l , the thickness of the top plate on the top of the single-cylinder water jacket sand core is l 1, in order to achieve good cooling of the piston ring and reduce the weight, and also to ensure the stiffness of the top surface of the engine block, the thickness of the top plate is l 1, the value range is 10-15mm; the design of thin top plate can better cool the piston ring, avoid a series of problems such as excessive temperature at the top, coke of engine oil, deformation of cylinder hole, abnormal wear of cylinder sleeve, etc.

[0069] In addition, in order to increase the flow speed of the cooling liquid at the bottom of the engine block, the single-cylinder water jacket sand core is made into a short water jacket sand core form, so that the ratio of the height of the single-cylinder water jacket sand core to the cylinder hole height L is l , the value range is l / L: 40%~60%, so that the flow speed of the lower cooling liquid is improved, the height difference of the cooling liquid flowing from the cooling cavity 2 to the first water jacket cavity 4 and the second water jacket cavity 5 is reduced, thereby improving the flow performance and flow speed, avoiding waste of cooling liquid, further enhancing the heat exchange efficiency, and because the cavity is arranged inside the engine block, the height of the single-cylinder water jacket sand core is effectively reduced, thereby further reducing the overall weight of the entire water jacket sand core, enhancing the strength and stability performance of the water jacket sand core, and improving the casting process.

[0070] Further, the bottom wall of the first inter-cylinder distribution port 17 is located at a height of at least one half of the height of the first water jacket cavity 4; the bottom wall of the second inter-cylinder distribution port is located at a height of at least one half of the height of the second water jacket cavity 5. This makes the cooling liquid have a high height difference when flowing from the main liquid inlet port 3 into the cooling cavity 2 and then through the first liquid inlet port 20 and the second liquid inlet port, so that the cooling liquid has good flow pressure, increases the flow capacity, and thus improves the flow performance of the cooling liquid.

[0071] Further, in order to make the cooling liquid flowing out of the first water jacket cavity 4 flow uniformly between each of the first water passing cavities 13 described below, or the cooling liquid flowing out of the second water jacket cavity 5 flow uniformly between each of the second water passing cavities 14 described below, and to sufficiently cool the upper cylinder head, the first guide passage 11 between the first water jacket cavity 4 and the cooling cavity 2 is arranged obliquely, the second guide passage 12 between the second water jacket cavity 5 and the cooling cavity 2 is arranged obliquely, and a transition fillet is formed between the first guide passage 11 and the peripheral surface of the first water jacket cavity 4, and a transition fillet is formed between the second guide passage 12 and the peripheral surface of the second water jacket cavity 5, and the transition fillet needs to be large and smooth enough.

[0072] Preferably, the transition fillet formed between the first guide passage 11 and the first water jacket cavity 4, and the transition fillet R formed between the second guide passage 12 and the second water jacket cavity 5 are each not less than 15 mm, so as to increase the fluid pressure of the cooling liquid flowing into the plurality of first water passing cavities 13 or the plurality of second water passing cavities 14, thereby further improving the cooling capacity.

[0073] As a preferred embodiment, the bottom wall of the main liquid inlet port 3 is located at a height that is flush with the bottom wall of the first distribution port 6 and the second distribution port 7; or the bottom wall of the main liquid inlet port 3 is located at a height that is not lower than the bottom wall of the first distribution port 6 and the second distribution port 7.

[0074] The bottom wall of the cooling cavity 2 is higher than the bottom wall of the first distribution port 6 and the second distribution port 7, so that the liquid level of the cooling liquid entering the cooling cavity 2 from the main liquid inlet port 3 is higher than the liquid level of the cooling liquid distributed to the first distribution port 6 and the second distribution port 7, thereby increasing the flow pressure of the liquid, enabling the cooling liquid to flow sufficiently in the flow passage from the main liquid inlet port 3 into the cooling cavity 2, enhancing the flow performance of the cooling liquid, and further enabling the cooling liquid to flow from the main liquid inlet port 3 towards the first distribution port 6 and the second distribution port 7, so that the cooling liquid can be completely discharged and fully cooled.

[0075] As a preferred embodiment, the bottom wall of the cooling cavity 2 is located at a height that is flush with the bottom wall of the main liquid inlet port 3; or the bottom wall of the cooling cavity 2 is located at a height that is not lower than the bottom wall of the main liquid inlet port 3.

[0076] It is worth noting here that the bottom wall height of the cooling cavity 2 is slightly higher than that of the main liquid inlet 3, and the purpose is to enable the cooling liquid to be completely discharged during the process of flowing to the first water jacket cavity 4 or the second water jacket cavity 5 in the cooling cavity 2; the bottom wall height of the cooling cavity 2 can also be flush with that of the main liquid inlet 3, so as to facilitate the cooling liquid to enter the cooling cavity 2 from the main liquid inlet 3. By such arrangement, the cooling liquid can be completely discharged, and water can be ensured not to be stored in the engine body when the vehicle is parked.

[0077] The application also relates to an engine comprising the engine body with the cooling structure.

[0078] The engine body is a dry cylinder liner engine body, and the dry cylinder liner engine body comprises a cylinder body with a plurality of cylinder holes on two sides.

[0079] The application does not describe the places that can be realized by using or referring to the existing technology.

[0080] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment mainly describes the differences from other embodiments.

[0081] The above only describes the embodiments of the application and is not used to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. An engine block having a cooling structure, characterized by, The application relates to a cylinder body with multiple cylinder bores on two sides; a cooling cavity (2) for mounting an oil cooler is formed between the cylinder bores on the two sides, the cooling cavity (2) has a main liquid inlet (3), a fluid passage for cooling liquid flow is formed between the oil cooler and the inner wall of the cooling cavity (2); a first water jacket cavity (4) is formed on one side of the cooling cavity (2) and surrounds the outer periphery of the cylinder bore and is connected with the cooling cavity (2); a second water jacket cavity (5) is formed on the other side of the cooling cavity (2) and surrounds the outer periphery of the cylinder bore and is connected with the cooling cavity (2); the cooling cavity (2) is provided with a first liquid distribution port (6) for connecting the first water jacket cavity (4) with the fluid passage and a second liquid distribution port (7) for connecting the second water jacket cavity (5) with the fluid passage; a first limiting belt (8) is connected to one side of the cooling cavity (2) close to the main liquid inlet (3), and a second limiting belt (9) is connected to one side of the cooling cavity (2) close to the second liquid distribution port (7); the first limiting belt (8) and the second limiting belt (9) can guide the cooling liquid to flow along the outer periphery of the oil cooler and cool the oil in the oil cooler; a coordination cavity (10) is formed on one side of the cooling cavity (2) opposite to the main liquid inlet (3), the coordination cavity (10) can evenly distribute the cooling liquid entering the first water jacket cavity (4) and the second water jacket cavity (5); the first water jacket cavity (4) is provided with a first liquid inlet (20) connected with the first liquid distribution port (6), a first guiding passage (11) is formed between the first liquid distribution port (6) and the first liquid inlet (20), a slope with a preset angle is formed between the first guiding passage (11) and the main liquid inlet (3), and a transition round corner is formed between the first guiding passage (11) and the first water jacket cavity (4); the first water jacket cavity (4) has multiple first water passing cavities (13) connected side by side; a first cylinder interval liquid distribution port (17) is formed on one side of two adjacent first water passing cavities (13) facing the outside of the engine body.

2. The engine block having a cooling structure according to claim 1, characterized by The width of the coordination cavity (10) is not less than the width of the first liquid distribution port (6) or the width of the second liquid distribution port (7).

3. The engine block having a cooling structure according to claim 1, characterized by A first cylinder interval water blocking wall (15) is formed on one side of two adjacent first water passing cavities (13) facing the inside of the engine body, and a first water string hole (16) is formed on one side of the first cylinder interval water blocking wall (15) and can make the cooling liquid flow between multiple first water passing cavities (13).

4. The engine block having a cooling structure according to claim 3, characterized by Multiple first liquid holes (18) are arranged on one side of the first water passing cavity (13) and protrude from the end of the first water passing cavity (13), and the cooling liquid can flow towards the cylinder cover through the first liquid holes (18).

5. The engine block having a cooling structure according to claim 4, wherein The bottom wall of the first inter-cylinder distribution port (17) is located at a height of at least one half of the height of the first water jacket cavity (4); the slope formed between the first guide passage (11) and the main liquid inlet (3) has a value in the range of 15°-30°; and the transition fillet formed between the first guide passage (11) and the first water jacket cavity (4) has a value not less than 15 mm.

6. The engine block with cooling structure according to claim 1, wherein The bottom wall of the cooling cavity (2) is located at a height that is flush with the bottom wall of the first distribution port (6) and the second distribution port (7); or the bottom wall of the cooling cavity (2) is located at a height not lower than the bottom wall of the first distribution port (6) and the second distribution port (7).

7. The engine block with cooling structure according to claim 1, wherein The bottom wall of the cooling cavity (2) is located at a height that is flush with the bottom wall of the main liquid inlet (3); or the bottom wall of the cooling cavity (2) is located at a height not lower than the bottom wall of the main liquid inlet (3).

8. An engine characterized by, The machine body has a cooling structure as claimed in any one of claims 1-7; the machine body is a dry cylinder liner machine body, the dry cylinder liner machine body comprising a cylinder body having a plurality of cylinder holes on both sides; the inner wall of the cylinder hole is connected with a dry cylinder liner; or, The machine body is a cylinder liner-free machine body, the cylinder liner-free machine body comprising a cylinder body having a plurality of cylinder holes on both sides, and the inner wall of the cylinder hole is not connected with a cylinder liner.

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