CN217002037U

CN217002037U - Engine cooling system and vehicle with same

Info

Publication number: CN217002037U
Application number: CN202220350232.XU
Authority: CN
Inventors: 纪雷
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-07-19
Anticipated expiration: 2032-02-21

Abstract

The utility model discloses an engine cooling system and a vehicle with the same, wherein the engine cooling system comprises: the cylinder cover water jacket comprises a main body water jacket part, an exhaust upper water jacket part and an exhaust lower water jacket part, and the exhaust upper water jacket part and the exhaust lower water jacket part are both connected with the exhaust side of the main body water jacket part; the cylinder body water jacket is connected with the cylinder cover water jacket; wherein a part of the cooling water in the cylinder water jacket flows to the main body water jacket part through the exhaust upper water jacket part and the exhaust lower water jacket part, and the cooling water which has cooled the main body water jacket part flows back to the cylinder water jacket. The engine cooling system can cool different areas of the cylinder cover, is convenient for improving the cooling capacity of the cylinder cover water jacket on the cylinder cover, avoids local thermal stress concentration of the cylinder cover, meets the cooling requirement of the cylinder cover, is convenient for improving the cooling efficiency of cooling water, and is beneficial to effectively improving the cooling performance of the cylinder cover water jacket.

Description

Engine cooling system and vehicle with same

Technical Field

The utility model relates to the technical field of vehicles, in particular to an engine cooling system and a vehicle with the same.

Background

In the related art, after an exhaust manifold is integrated with a cylinder head, the heat load of the cylinder head needs to be increased by at least 10% -20%, the increased heat load needs to be cooled by a cooling water jacket, but in the prior art, the cooling capacity of the cooling water jacket is increased mostly by increasing the flow of a cooling water pump, but the research and development cost of the water pump is increased by using a high-flow cooling water pump, and after the flow of the water pump is increased to a certain degree, the cooling efficiency of the cooling water jacket is not increased along with the increase of the flow, that is, the cooling capacity of the existing cooling water jacket cannot meet the cooling demand of the cylinder head after the exhaust manifold is integrated, and local thermal stress concentration is easily caused, so that the cylinder head generates thermal fatigue, cracks and the like, and the dynamic property and the economical efficiency of an engine are reduced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an engine cooling system, which can cool different areas of a cylinder head, and is convenient for improving the cooling capacity of a cylinder head water jacket on the cylinder head.

An engine cooling system according to an embodiment of the present invention includes: the cylinder cover water jacket comprises a main body water jacket part, an exhaust upper water jacket part and an exhaust lower water jacket part, and the exhaust upper water jacket part and the exhaust lower water jacket part are both connected with the exhaust side of the main body water jacket part; the cylinder body water jacket is connected with the cylinder cover water jacket; wherein a part of the cooling water in the cylinder water jacket flows to the main body water jacket part through the exhaust upper water jacket part and the exhaust lower water jacket part, and the cooling water which has cooled the main body water jacket part flows back to the cylinder water jacket.

According to the engine cooling system provided by the embodiment of the utility model, different areas of the cylinder cover can be cooled by arranging the main body water jacket part, the exhaust upper water jacket part and the exhaust lower water jacket part, so that the cooling capacity of the cylinder cover water jacket on the cylinder cover is improved, the local thermal stress concentration of the cylinder cover is avoided, the cooling requirement of the cylinder cover is met, and the cooling water in the cylinder cover water jacket has a plurality of flow paths, so that the cooling efficiency of the cooling water is improved, the cylinder cover is effectively cooled, and the cooling performance of the cylinder cover water jacket is improved effectively.

According to the engine cooling system of the embodiment of the utility model, the body water jacket part comprises the cylinder head nose bridge area water jacket and the combustion chamber wall surface cooling water jacket, two parts of cooling water in the cylinder body water jacket flow to the cylinder head nose bridge area water jacket, three parts of cooling water in the cylinder body water jacket flow to the combustion chamber wall surface cooling water jacket, and the cooling water which has cooled the cylinder head nose bridge area water jacket and the combustion chamber wall surface cooling water jacket flows back to the cylinder body water jacket.

According to the engine cooling system of some embodiments of the present invention, a gasket is sandwiched between the cylinder block water jacket and the cylinder head water jacket, and the gasket has a gasket first water feeding port, a gasket second water feeding port, and a gasket auxiliary water feeding port; the cylinder cover water jacket is provided with a cylinder cover first water feeding port, a cylinder cover second water feeding port and a cylinder cover auxiliary water feeding port, the cylinder cover first water feeding port is positioned on the exhaust water feeding jacket part, the cylinder cover second water feeding port is positioned between the main body water jacket part and the exhaust water feeding jacket part, and the cylinder cover auxiliary water feeding port is positioned on the combustion chamber wall surface cooling water jacket; wherein a part of the cooling water flows to the exhaust water jacket part through the gasket first water feeding port and the cylinder cover first water feeding port in sequence, a second part of the cooling water flows to the cylinder cover nose bridge area water jacket through the gasket second water feeding port and the cylinder cover second water feeding port in sequence, and a third part of the cooling water flows to the combustion chamber wall surface cooling water jacket through the gasket auxiliary water feeding port and the cylinder cover auxiliary water feeding port.

According to the engine cooling system of some embodiments of the present invention, the cylinder head water jacket is provided with a cylinder head water return port, the cylinder head water return port is located on the air inlet side of the main body water jacket portion, the gasket is further provided with a gasket water return port, the cylinder body water jacket is provided with a cylinder body water return port, the cylinder body water return port is located on the air inlet side of the cylinder body water jacket, the cooling water in the cylinder head water jacket sequentially flows back into the cylinder body water jacket through the cylinder head water return port, the gasket water return port and the cylinder body water return port, the cylinder body water jacket is provided with a cylinder body water outlet communicated with the cooling circulation pipeline of the entire vehicle, and the cylinder body water outlet is located on the air outlet side of the cylinder body water jacket.

According to some embodiments of the utility model, the cylinder water jacket includes a plurality of cylinder sub-water jackets respectively corresponding to the cylinders one by one, the combustion chamber wall surface cooling water jacket includes a plurality of combustion chamber sub-cooling water jackets respectively corresponding to the combustion chambers one by one, the cylinder water jacket has a cylinder inter-cylinder water jacket upper water gap, the gasket has a gasket inter-cylinder water jacket upper water gap, the cylinder cover water jacket has a cylinder cover inter-cylinder water jacket upper water gap, the cylinder inter-cylinder water jacket upper water gap is located between two adjacent cylinder sub-water jackets, and four portions of cooling water in the cylinder water jacket flow into the cylinder cover water jacket through the cylinder inter-cylinder water jacket upper water gap, the gasket inter-cylinder water jacket upper water gap and the cylinder cover inter-cylinder water jacket upper water gap and flow back to the main body water jacket portion from the cylinder cover water return port.

According to the engine cooling system of some embodiments of the present invention, the area of the flow cross section of the water feeding port of the water jacket between the gasket cylinders is S, and the following requirements are satisfied: s is less than or equal to pi 2.5²。

According to the engine cooling system of some embodiments of the present invention, the water content of the part of the cooling water accounts for 20% to 45% of the water content of all the cooling water in the head water jacket.

According to the engine cooling system of some embodiments of the present invention, the body water jacket portion includes a plurality of sub-body water jackets respectively corresponding to the cylinders one by one, the head nose bridge area water jacket includes a plurality of head nose bridge area water jackets respectively corresponding to the cylinders one by one, the sub-body water jacket includes one combustion chamber sub-cooling water jacket and one head nose bridge area water jacket, and the amount of cooling water in each sub-body water jacket accounts for 15% to 25% of the amount of cooling water in all the head water jackets.

According to the engine cooling system of some embodiments of the present invention, the cylinder cover water return port includes a plurality of cylinder cover sub water return ports respectively corresponding to the sub body water jackets in a one-to-one manner, and of all the cylinder cover sub water return ports, the water amount of the cylinder cover water return port arranged near the cylinder block water outlet is the smallest and is less than or equal to 1/n of the water amount of all the cooling water in the cylinder cover water jacket, or is less than or equal to 1/n of the water amount of the cylinder block water outlet, where n is the number of cylinders.

The utility model also provides a vehicle.

According to the vehicle of the embodiment of the utility model, the engine cooling system of any one of the embodiments is provided.

The vehicle has the same advantages of the engine cooling system described above over the prior art and will not be described in detail here.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic block diagram of an engine cooling system according to some embodiments of the present disclosure;

FIG. 2 is a schematic illustration (from another perspective) of the construction of an engine cooling system according to some embodiments of the present invention;

FIG. 3 is a schematic structural view of a cylinder head water jacket according to some embodiments of the present invention;

FIG. 4 is a schematic illustration of the assembly of a cylinder head water jacket and gasket according to some embodiments of the utility model;

FIG. 5 is a schematic structural view (another perspective) of a cylinder head water jacket according to some embodiments of the present invention;

FIG. 6 is a cross-sectional view taken at A-A in FIG. 5;

FIG. 7 is a schematic structural view of a block jacket according to some embodiments of the present invention.

Reference numerals:

the cooling system 100 of the engine is provided with,

a cylinder cover water jacket 1, a main body water jacket part 11, an exhaust upper water jacket part 12, an exhaust lower water jacket part 13, a sub-main body water jacket 14, a cylinder cover first water feeding port 15, a cylinder cover second water feeding port 16, a cylinder cover auxiliary water feeding port 17, a cylinder cover water returning port 18, a cylinder cover inter-cylinder water jacket water feeding port 19,

a cylinder water jacket 2, a cylinder water inlet 21, a cylinder water return 22, a cylinder water outlet 23, a cylinder inter-cylinder water jacket upper water inlet 24, a cylinder upper water inlet 25,

the device comprises a gasket 3, a first gasket water feeding port 31, a second gasket water feeding port 32, an auxiliary gasket water feeding port 33, a gasket water returning port 34, a gasket inter-cylinder water jacket water feeding port 35 and an exhaust passage 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

Referring to fig. 1-7, an engine cooling system 100 according to an embodiment of the present invention will be described, and it should be noted that a cylinder head of the engine cooling system 100 of the present invention is integrated with an exhaust manifold, in other words, the exhaust manifold and an end cover are an integral structure, so that an exhaust passage 4 is formed on the end cover, and high-temperature exhaust gas generated in a cylinder block can be exhausted through the exhaust passage 4.

As shown in fig. 1 and 2, an engine cooling system 100 according to an embodiment of the present invention includes: a cylinder cover water jacket 1 and a cylinder body water jacket 2.

Specifically, as shown in fig. 5 and 6, the cylinder head water jacket 1 includes a main body water jacket portion 11, an exhaust upper water jacket portion 12, and an exhaust lower water jacket portion 13, and the exhaust upper water jacket portion 12 and the exhaust lower water jacket portion 13 each connect the exhaust side of the main body water jacket portion 11.

Preferably, the main water jacket portion 11, the upper exhaust water jacket portion 12 and the lower exhaust water jacket portion 13 are all communicated with each other, and the cylinder head water jacket 1 can be sleeved on the cylinder head so as to exchange heat with the cylinder head through cooling water in the cylinder head water jacket 1, wherein the main water jacket portion 11 is used for cooling a combustion chamber of the cylinder head, that is, the cooling water in the main water jacket portion 11 exchanges heat with heat transferred to a wall surface of the combustion chamber by high-temperature gas in the combustion chamber, the upper exhaust water jacket portion 12 and the lower exhaust water jacket portion 13 are respectively arranged on two sides of the exhaust passage 4 of the cylinder head, and the two portions are used for cooling structures on two sides of the exhaust passage 4 of the cylinder head together, that is, the cooling water in the upper exhaust water jacket portion 12 and the cooling water in the lower exhaust water jacket portion 13 exchange heat with heat transferred to the wall surface of the exhaust passage 4 by high-temperature exhaust gas.

Therefore, the main body water jacket part 11, the exhaust upper water jacket part 12 and the exhaust lower water jacket part 13 are arranged on the cylinder cover water jacket 1, heat exchange can be performed on different areas of the cylinder cover in a targeted mode, the heat exchange requirements of the different areas of the cylinder cover are met, the cooling capacity of the cylinder cover water jacket 1 on the cylinder cover is further improved, and the problem of local thermal stress concentration of the cylinder cover is avoided.

Wherein, a part of the cooling water in the cylinder water jacket 2 flows to the main body water jacket 11 through the exhaust upper water jacket part 12 and the exhaust lower water jacket part 13, and the cooling water which has cooled the main body water jacket 11 flows back to the cylinder water jacket 2.

It is understood that a part of the cooling water in the block water jacket 2 may cool the exhaust upper water jacket portion 12, the exhaust lower water jacket portion 13, and the body water jacket portion 11 in this order, and then the cooled part of the cooling water may flow back into the block water jacket 2. This facilitates circulation of a part of the cooling water between the cylinder block water jacket 2 and the cylinder head water jacket 1, thereby improving the cooling efficiency of the cylinder head water jacket 1.

According to the engine cooling system 100 provided by the embodiment of the utility model, by arranging the main body water jacket part 11, the exhaust upper water jacket part 12 and the exhaust lower water jacket part 13, different areas of the cylinder cover can be cooled, the cooling capacity of the cylinder cover water jacket 1 on the cylinder cover is improved, the local thermal stress concentration of the cylinder cover is avoided, the cooling requirement of the cylinder cover is met, the cooling water in the cylinder cover water jacket 1 can have multiple flow paths, the cooling efficiency of the cooling water is improved, the cylinder cover is cooled effectively, and the cooling performance of the cylinder cover water jacket 1 is improved effectively.

Further, the main body water jacket portion 11 includes a cylinder head bridge region water jacket and a combustion chamber wall surface cooling water jacket, two portions of cooling water in the cylinder body water jacket 2 flow to the cylinder head bridge region water jacket, and three portions of cooling water flow to the combustion chamber wall surface cooling water jacket, and the cooling water which has cooled the cylinder head bridge region water jacket and the combustion chamber wall surface cooling water jacket flows back to the cylinder body water jacket 2.

It can be understood that at least three flow paths of cooling water are formed in the cylinder head water jacket 1, and the three flow paths of cooling water can all be in a parallel relation, that is, the flow paths of cooling water can work simultaneously, so that the cooling water in different flow paths is used for cooling different areas of the cylinder head simultaneously, and then the cooling water in the cylinder head water jacket 1 can flow back to the cylinder body water jacket 2 simultaneously, thereby facilitating the improvement of the flow efficiency of the cooling water entering the cylinder head water jacket 1, and further improving the cooling effect of the cylinder head water jacket 1.

Preferably, the block water jacket 2 is connected with the block for exchanging heat with the block in the engine, and as shown in fig. 7, one end of the block water jacket 2 is provided with a block water inlet 21, and the block water jacket 2 is connected with a cooling water pump through the block water inlet 21, it can be understood that the cooling water pump pumps cooling water into the block water jacket 2 through the block water inlet 21, and then part of the cooling water in the block water jacket 2 flows into the head nose bridge region water jacket and the combustion chamber wall surface cooling water jacket, respectively.

Therefore, two parts of cooling water in the cylinder body water jacket 2 flow into the cylinder head nose bridge area water jacket, in other words, one part of cooling water in the cylinder body water jacket 1 and the cooling water entering the cylinder head nose bridge area water jacket are jointly used for cooling the cylinder head nose bridge area water jacket, and meanwhile, the flow rate of the part of cooling water is high, so that the capacity of the cooling water for taking away heat from the wall surface of the nose bridge area is enhanced, and the cooling effect on the nose bridge area of the cylinder head is further improved.

Furthermore, the cooling water entering the cooling water jacket on the wall surface of the combustion chamber is used for cooling the relevant wall surface of the combustion chamber, and meanwhile, the flow velocity of the cooling water is high, so that the wall surface between the exhaust passage 4 and the combustion chamber is conveniently cooled, and the temperature of each relevant wall surface is reduced.

It should be noted that the cooling water entering the water jacket in the cylinder head nose bridge area and the cooling water entering the cooling water jacket on the wall surface of the combustion chamber are arranged in parallel, so that the cooling water in the cylinder body water jacket 2 can simultaneously enter the water jacket in the cylinder head nose bridge area and the cooling water jacket on the wall surface of the combustion chamber, the cooling efficiency of the cylinder head is improved, and the cooling performance of the water jacket 1 of the cylinder head is effectively improved.

In some embodiments, as shown in fig. 1 and 2, a gasket 3 is sandwiched between the block water jacket 2 and the cylinder head water jacket 1, that is, the gasket 3 is sandwiched between the block water jacket 2 and the cylinder head water jacket 1, so that the gasket 3 is used for enhancing the connection sealing performance between the block water jacket 2 and the cylinder head water jacket 1.

Further, as shown in fig. 4, the gasket 3 has a gasket first upper nozzle 31, a gasket second upper nozzle 32, and a gasket auxiliary upper nozzle 33, and as shown in fig. 3, the cylinder head water jacket 1 has a cylinder head first upper nozzle 15, a cylinder head second upper nozzle 16, and a cylinder head auxiliary upper nozzle 17, the cylinder head first upper nozzle 15 is located on the exhaust upper water jacket portion 12, the cylinder head second upper nozzle 16 is located between the main body water jacket portion 11 and the exhaust upper water jacket portion 12, and the cylinder head auxiliary upper nozzle 17 is located on the combustion chamber wall surface cooling water jacket.

Wherein, a part of cooling water flows to the exhaust upper water jacket part 12 through the gasket first upper water gap 31 and the cylinder cover first upper water gap 15 in sequence, a part of cooling water flows to the cylinder cover nose bridge area water jacket through the gasket second upper water gap 32 and the cylinder cover second upper water gap 16 in sequence, and a part of cooling water flows to the combustion chamber wall surface cooling water jacket through the gasket auxiliary upper water gap 33 and the cylinder cover auxiliary upper water gap 17 in sequence.

It can be understood that the gasket first water feeding port 31 is opposite to the cylinder cover first water feeding port 15, the gasket second water feeding port 32 is opposite to the cylinder cover second water feeding port 16, and the gasket auxiliary water feeding port 33 is opposite to the cylinder cover auxiliary water feeding port 17.

Therefore, in the actual cooling process, the cooling water in the cylinder water jacket 2 can enter the cylinder head water jacket 1 through the gasket first water feeding port 31, the gasket second water feeding port 32 and the gasket auxiliary water feeding port 33 of the gasket 3, so that the cooling water in the cylinder water jacket 2 can enter the cylinder head water jacket 1 through the three flow paths, the flowing efficiency of the cooling water is improved, and the cooling capacity of the cylinder head water jacket 1 on a cylinder head is improved.

In some embodiments, as shown in fig. 4, the cylinder head water jacket 1 is provided with a cylinder head water return port 18, and the cylinder head water return port 18 is located on the intake side of the main body water jacket portion 11, and the gasket 3 further has a gasket water return port 34.

Further, the cylinder water jacket 2 is provided with a cylinder water return port 22, the cylinder water return port 22 is positioned on the air inlet side of the cylinder water jacket 2, cooling water in the cylinder water jacket 1 sequentially flows back into the cylinder water jacket 2 through the cylinder water return port 18, the gasket water return port 34 and the cylinder water return port 22, the cylinder water jacket 2 is provided with a cylinder water outlet 23 communicated with a cooling circulation pipeline of the whole vehicle, and the cylinder water outlet 23 is positioned on the air exhaust side of the cylinder water jacket 2.

Preferably, the cylinder water jacket 2 is provided with a cylinder water inlet 21, a cylinder water return port 22 and a cylinder water outlet 23, wherein the cylinder water inlet 21 is connected with a cooling water pump, and the cylinder water outlet 23 is communicated with a cooling circulation pipeline of the whole vehicle, so that the cylinder water jacket 2, the gasket 3 and the cylinder cover water jacket 1 are connected in the cooling circulation pipeline of the whole vehicle, and the design and arrangement difficulty of the cylinder cover water jacket 1 is further reduced.

It is understood that, in the present invention, the partial cycle of the engine cooling system 100 is: the cooling water pump pumps the cooling water into the cylinder water jacket 2, the cooling water in the cylinder water jacket 2 flows into the cylinder head water jacket 1 through the gasket first water feeding port 31, the gasket second water feeding port 32 and the gasket auxiliary water feeding port 33 of the gasket 3, and then the cooling water in the cylinder head water jacket 1 flows back into the cylinder water jacket 2 through the cylinder head water returning port 18, the gasket water returning port 34 and the cylinder body water returning port 22 in sequence, and then flows into a cooling circulation pipeline of the whole vehicle through the cylinder water outlet 23, so that the cooling circulation of the engine cooling system 100 is formed.

From this, the cooling water in the cylinder cap water jacket 1 can carry out the heat transfer to the different regions of cylinder cap to be convenient for improve the cooling capacity of cylinder cap water jacket 1 to the cylinder cap, avoid the local thermal stress concentration of cylinder cap, satisfy the cooling demand of cylinder cap, and can make the cooling water in the cylinder cap water jacket 1 have many flow paths, be convenient for improve the cooling efficiency of cooling water, and then cool off the cylinder cap effectively, do benefit to effectively promoting the cooling performance of cylinder cap water jacket 1.

In some embodiments, the block water jacket 2 includes a plurality of block water sub-jackets corresponding to the cylinders one by one, the combustion chamber wall cooling water jacket includes a plurality of combustion chamber water sub-jackets corresponding to the combustion chambers one by one, and as shown in fig. 3 and 4, the block water jacket 2 has a block water-feeding port 25 and a block inter-cylinder water-jacket water-feeding port 24, the block inter-cylinder water-jacket water-feeding port 24 is located between two adjacent block water sub-jackets, the gasket 3 is provided with a gasket inter-cylinder water-jacket water-feeding port 35, the head water jacket 1 is provided with a head inter-cylinder water-jacket water-feeding port 19, and the head inter-cylinder water-jacket water-feeding port 19 is located between two adjacent combustion chamber water sub-cooling jackets.

Preferably, a part of the cooling water in the cylinder water jacket 2, and three parts of the cooling water flow into the cylinder head water jacket 1 through the gasket 3, and four parts of the cooling water in the cylinder water jacket 2 flow to the body water jacket portion 11 through the inter-cylinder water jacket upper water port 24, the gasket inter-cylinder water jacket upper water port 35, and the cylinder head inter-cylinder water jacket upper water port 19, and flow back to the cylinder water jacket 2 through the cylinder head water return port 18.

It can be understood that the cylinder water jacket 2 includes an inter-cylinder water jacket, and during actual cooling, four portions of cooling water in the cylinder water jacket 2 flow into the inter-cylinder water jacket between two adjacent cylinders, and then the cooling water enters the cylinder head through the gasket inter-cylinder water jacket water feeding port 35 and the cylinder head inter-cylinder water jacket water feeding port 19, so as to enhance heat exchange between the cooling water and the two adjacent cylinders, further to uniformly cool the combustion chamber of each cylinder, promote good combustion consistency of each cylinder, reduce occurrence probability of combustion cyclic variation and knocking, and facilitate improvement of dynamic performance and economy of the engine.

Further, the area of the flow cross section of the water inlet 35 of the water jacket between the gasket cylinders is S, and the following conditions are met: s is less than or equal to pi 2.5²。

For example, S ═ 1 pi, or S ═ 2 pi, or further, S ═ 4 pi, preferably, S ═ 2.5 pi, and the inter-gasket water jacket upper nozzle 35 may be configured as a circular hole or other regular through holes of equal area, in other words, the inter-gasket water jacket upper nozzle 35 is a circular hole of 5mm diameter. It will be appreciated that the cross-section of the spacer inter-cylinder water jacket top nozzle 35 is not too large to ensure the flow of cooling water. It should be noted that the spacer inter-cylinder water jacket water supply port 35 may be configured as a circular or other regular through hole, and is not limited herein.

In some embodiments, the amount of water of a portion of the cooling water is 20% to 45% of the amount of water of all the cooling water in the cylinder head water jacket 1.

For example, the amount of water of a portion of the cooling water may be 30% of the amount of water of all the cooling water in the cylinder head water jacket 1, or the amount of water of a portion of the cooling water may be 35% of the amount of water of all the cooling water in the cylinder head water jacket 1, or the amount of water of a portion of the cooling water may be 40% of the amount of water of all the cooling water in the cylinder head water jacket 1, and when the ratio of the amount of water of a portion of the cooling water to the amount of water of all the cooling water in the cylinder head water jacket 1 satisfies the above value range, it is possible to ensure that the exhaust wall surface of the exhaust passage 4 can be sufficiently cooled by a portion of the cooling water.

It can be understood that a part of the cooling water is mainly used for cooling the exhaust wall surface of the exhaust passage 4 of the cylinder head, and more cooling water is needed to cool the exhaust wall surface in view of the high-temperature thermal load of the exhaust wall surface, so that the cooling water meeting the value range is convenient for better cooling the high-temperature area of the exhaust passage 4 of the cylinder head, thereby being beneficial to preventing the problem of thermal stress concentration at the exhaust passage 4 and reducing the thermal deformation of the exhaust passage 4.

In some embodiments, the main body water jacket 11 includes a plurality of sub-body water jackets 14 corresponding to the cylinders, respectively, the head nose bridge area water jacket includes a plurality of head nose bridge area water jackets corresponding to the cylinders, respectively, the sub-body water jacket 14 includes a combustion chamber sub-cooling water jacket and a head nose bridge area water jacket, respectively, the number of the sub-body water jackets 14 is the same as the number of the cylinders, and the plurality of sub-body water jackets 14 correspond to the plurality of cylinders, respectively, so that the plurality of sub-body water jackets 14 cool the wall surfaces of the plurality of cylinders, respectively, thereby reducing the temperature of the respective cylinders.

Wherein, the water amount of the cooling water in each sub-body water jacket 14 accounts for 15 to 25 percent of the water amount of all the cooling water in the cylinder cover water jacket 1. Preferably, the cylinder head water jacket 1 may include three sub-body water jackets 14, and the amount of cooling water in each of the three sub-body water jackets 14 accounts for 15% to 25% of the amount of all the cooling water within the cylinder head water jacket 1.

Preferably, the proportion of the water volume of the cooling water in each sub-body water jacket 14 to the total water volume of the cooling water in the cylinder head is the same, so that the cooling consistency and uniformity of each sub-body water jacket 14 to the corresponding cylinder body can be effectively ensured, and the local high-temperature failure caused by the local insufficient cooling can be effectively prevented.

Further, the difference in the amount of water between any two sub-body water jackets 14 among the plurality of sub-body water jackets 14 is less than 10%. For example, the water amount difference between any two of the plurality of sub-body water jackets 14 may be 5% or 6%, and of course, the water amount difference between any two of the sub-body water jackets 14 may also be zero.

It should be noted that, in order to ensure the cooling of the wall surface of each cylinder and control the water supply amount of each sub-body water jacket 14 to be approximately the same, the cooling consistency and uniformity of each cylinder can be effectively ensured, and the local high-temperature failure caused by local insufficient cooling can be effectively prevented.

Furthermore, the cylinder cover water return port 18 includes a plurality of cylinder cover sub water return ports corresponding to the sub-body water jackets 14 one to one, so that the cooling water in each sub-body water jacket 14 can flow back to the cylinder body water jacket 2 through the corresponding cylinder cover sub water return port, and then the cooling water in the cylinder cover water jacket 1 can flow back to the cylinder body water jacket 2 through a plurality of paths, which is beneficial to improving the flow rate of the cooling water in the cylinder cover water jacket 1.

Among all the cylinder cover water return ports, the water quantity of the cylinder cover sub water return port arranged close to the cylinder body water outlet 23 is the smallest and is less than or equal to 1/n of the water quantity of all cooling water in the cylinder cover water jacket 1, or less than or equal to 1/n of the water quantity of the cylinder body water outlet 23, wherein n is the number of cylinders.

For example, when there are three sub-body water jackets 14, that is, n is 3, at this time, the amount of water in the sub-body water jacket 14 closest to the first head water supply port 15 and the second head water return port 18 among the three sub-body water jackets 14 is less than or equal to 1/3 of the total amount of water returned or the total amount of water discharged from the head water jacket 1, thereby facilitating reduction of the influence of the difference in the arrangement positions of the block water inlet 21 and the block water outlet 23 on the cylinder head cooling uniformity.

It should be noted that, the cylinder head water jacket 1 of the engine cooling system 100 of the present invention, which is arranged according to the cooling requirements of the cylinder body and the cylinder head, can effectively improve the cooling efficiency of the cooling water, effectively improve the cooling performance of the engine, and compared with the cooling water jacket in the prior art, during actual cooling, the temperature of the combustion chamber of the cylinder head of the present invention is reduced by 50 ℃, the structural temperature of other parts is reduced by 10 ℃ to 60 ℃ and the like, thereby effectively reducing the thermal stress and thermal deformation of the engine, and improving the reliability of the engine; meanwhile, the cooling of the combustion chambers of the cylinders is uniform, so that the combustion consistency of the cylinders is good, the occurrence probability of combustion cyclic variation, detonation and the like is reduced, the dynamic property and the economical efficiency of the engine are favorably improved, and the market competitiveness is improved.

The utility model also provides a vehicle.

According to the vehicle of the embodiment of the utility model, the engine cooling system 100 of any one of the above embodiments is provided.

According to the vehicle provided by the embodiment of the utility model, the cylinder cover water jacket 1 is provided with the main body water jacket part 11, the exhaust upper water jacket part 12 and the exhaust lower water jacket part 13, different areas of a cylinder cover can be cooled, the cooling capacity of the cylinder cover by the cylinder cover water jacket 1 is convenient to improve, the local thermal stress concentration of the cylinder cover is avoided, the cooling requirement of the cylinder cover is met, and the cylinder cover can be effectively cooled by arranging the cylinder cover first water inlet 15, the cylinder cover second water inlet 16 and the cylinder cover auxiliary water inlet 17, so that the cooling water in the cylinder cover water jacket 1 has multiple flow paths, the cooling efficiency of the cooling water is convenient to improve, and the cylinder cover is effectively cooled, and the cooling performance of the cylinder cover water jacket 1 is favorably improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An engine cooling system (100), comprising:

the cylinder cover water jacket (1) comprises a main body water jacket part (11), an exhaust upper water jacket part (12) and an exhaust lower water jacket part (13), wherein the exhaust upper water jacket part (12) and the exhaust lower water jacket part (13) are connected with the exhaust side of the main body water jacket part (11);

the cylinder body water jacket (2), the cylinder body water jacket (2) is connected with the cylinder cover water jacket (1); wherein

And a part of cooling water in the cylinder water jacket (2) flows to the main body water jacket part (11) through the exhaust upper water jacket part (12) and the exhaust lower water jacket part (13), and the cooling water which is cooled by the main body water jacket part (11) flows back to the cylinder water jacket (2).

2. The engine cooling system (100) according to claim 1, wherein the body water jacket portion (11) includes a head-nose-bridge-region water jacket and a combustion-chamber-wall-surface cooling water jacket, two portions of the cooling water in the block water jacket (2) flow to the head-nose-bridge-region water jacket, and three portions of the cooling water flow to the combustion-chamber-wall-surface cooling water jacket, and the cooling water that has cooled the head-nose-bridge-region water jacket and the combustion-chamber-wall-surface cooling water jacket flows back to the block water jacket (2).

3. The engine cooling system (100) according to claim 2, wherein a gasket (3) is interposed between the block water jacket (2) and the cylinder head water jacket (1), the gasket (3) has a gasket first water feeding port (31), a gasket second water feeding port (32) and a gasket auxiliary water feeding port (33), the cylinder head water jacket (1) has a cylinder head first water feeding port (15), a cylinder head second water feeding port (16) and a cylinder head auxiliary water feeding port (17), the cylinder head first water feeding port (15) is located on the exhaust water feeding jacket portion (12), the cylinder head second water feeding port (16) is located between the main body water jacket portion (11) and the exhaust water feeding jacket portion (12), and the cylinder head auxiliary water feeding port (17) is located on the combustion chamber wall cooling water jacket; wherein

A part of cooling water flows to the exhaust water jacket part (12) through the gasket first water feeding port (31) and the cylinder cover first water feeding port (15) in sequence, a second part of cooling water flows to the cylinder cover nose bridge area water jacket through the gasket second water feeding port (32) and the cylinder cover second water feeding port (16) in sequence, and a third part of cooling water flows to the combustion chamber wall surface cooling water jacket through the gasket auxiliary water feeding port (33) and the cylinder cover auxiliary water feeding port (17) in sequence.

4. Engine cooling system (100) according to claim 3, the cylinder cover water jacket (1) is provided with a cylinder cover water return port (18), the cylinder cover water return port (18) is positioned on the air inlet side of the main body water jacket part (11), the gasket (3) is also provided with a gasket water return opening (34), the cylinder water jacket (2) is provided with a cylinder water return opening (22), the cylinder body water return port (22) is positioned on the air inlet side of the cylinder body water jacket (2), the cooling water in the cylinder cover water jacket (1) flows back to the cylinder body water jacket (2) through the cylinder cover water return port (18), the gasket water return port (34) and the cylinder body water return port (22) in sequence, and the cylinder body water jacket (2) is provided with a cylinder body water outlet (23) communicated with a cooling circulation pipeline of the whole vehicle, the cylinder water outlet (23) is positioned on the exhaust side of the cylinder water jacket (2).

5. The engine cooling system (100) according to claim 4, wherein the block water jacket (2) comprises a plurality of block water sub-jackets corresponding to the cylinders one by one, the combustion chamber wall surface cooling water jacket comprises a plurality of combustion chamber water sub-jackets corresponding to the combustion chambers one by one, the block water jacket (2) has a block inter-cylinder water jacket upper water gap (24), the block inter-cylinder water jacket upper water gap (24) is located between two adjacent block water sub-jackets, the gasket (3) is provided with a gasket inter-cylinder water jacket upper water gap (35), the cylinder head water jacket (1) is provided with a cylinder head inter-cylinder water jacket upper water gap (19), the cylinder head inter-cylinder water jacket upper water gap (19) is located between two adjacent combustion chamber water sub-jackets, and four portions of cooling water in the block water jacket (2) pass through the block inter-cylinder water jacket upper water gap (24), The gasket inter-cylinder water jacket upper water gap (35) and the cylinder head inter-cylinder water jacket upper water gap (19) flow to the body water jacket portion (11).

6. Engine cooling system (100) according to claim 5, characterized in that the gasket inter-cylinder water jacket top nozzle (35) has a flow cross-section area S satisfying: s is less than or equal to pi 2.5²。

7. The engine cooling system (100) according to any one of claims 1 to 6, characterized in that the water content of the portion of cooling water thereof is 20% to 45% of the water content of all cooling water in the head jacket (1).

8. The engine cooling system (100) according to claim 5, wherein the main body water jacket portion (11) includes a plurality of sub-main body water jackets (14) corresponding to the cylinders one by one, respectively, the cylinder head-nose-bridge region water jackets include a plurality of cylinder head-nose-bridge region water jackets corresponding to the cylinders one by one, respectively, the sub-main body water jackets (14) include one combustion chamber sub-cooling water jacket and one cylinder head-nose-bridge region water jacket, and the amount of cooling water in each sub-main body water jacket (14) is 15% to 25% of the amount of cooling water in all the cylinder head water jackets (1).

9. The engine cooling system (100) according to claim 8, wherein the cylinder cover water return port (18) comprises a plurality of cylinder cover sub water return ports corresponding to the sub-body water jackets (14) one by one, and the water volume of the cylinder cover water return port arranged near the cylinder body water outlet (23) in all the cylinder cover sub water return ports is the smallest and is less than or equal to 1/n of the water volume of all the cooling water in the cylinder cover water jacket (1) or less than or equal to 1/n of the water volume of the cylinder body water outlet (23), wherein n is the number of cylinders.

10. A vehicle, characterized in that an engine cooling system (100) according to any one of claims 1-9 is provided.