CN216111026U

CN216111026U - Engine cooling system

Info

Publication number: CN216111026U
Application number: CN202121694307.8U
Authority: CN
Inventors: 秦少博; 段正贺; 刘丽佳; 张岩; 赵华
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-03-22
Anticipated expiration: 2031-07-23

Abstract

The utility model discloses an engine cooling system, which comprises a cylinder body and a cylinder cover, wherein a water jacket comprises an exhaust side water jacket and an intake side water jacket, a first flow passage is formed in the exhaust side water jacket, and a second flow passage is formed in the intake side water jacket; and a third flow passage is formed in the cylinder cover and is respectively communicated with the first flow passage and the second flow passage, wherein the cooling liquid flows through the third flow passage from the first flow passage and then enters the second flow passage. According to the engine cooling system provided by the embodiment of the utility model, the starting efficiency of a vehicle is improved, connecting pipelines among the engine cooling systems are reduced, and the engine cooling system is directly communicated through water channels among the exhaust side water jacket, the cylinder cover and the intake side water jacket, so that the installation difficulty of the cooling water jacket is reduced, and the manufacturing efficiency is improved.

Description

Engine cooling system

Technical Field

The utility model relates to the field of vehicles, in particular to an engine cooling system.

Background

At present, automobile manufacturers develop engines with high thermal efficiency, and with the increasing power per liter of the engines, the requirements on cooling water circuit systems of the engines are higher and higher.

Most of existing water jackets enter a cylinder cover from the exhaust side of a cylinder body, the cylinder cover is arranged on the exhaust side after the cylinder body is cooled, water flows out from the rear end of the cylinder cover after transverse flow and longitudinal flow in the cylinder body, and the water flows into a whole vehicle radiator through an external pipeline. The cooling system cools the cylinder body more, and the temperature of the engine is slowly raised; less cooling of the cylinder head results in a higher temperature in the nose bridge region of the cylinder head.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model aims to provide an engine cooling system which improves the engine temperature rising speed and the cooling capacity of a cylinder head and reduces the temperature of a nose bridge area.

According to the engine cooling system of the embodiment of the utility model, the utility model discloses an engine cooling system comprises a cylinder body water jacket and a cylinder cover water jacket, wherein the cylinder body water jacket comprises an exhaust side water jacket and an intake side water jacket, a first flow passage is formed in the exhaust side water jacket, a second flow passage is formed in the intake side water jacket, a water jacket nose bridge area is formed between the exhaust side water jacket and the intake side water jacket, and a second connecting flow passage which is respectively communicated with the first flow passage and the second flow passage is formed in the water jacket nose bridge area; and a third flow passage is formed in the cylinder cover water jacket and is respectively communicated with the first flow passage and the second flow passage, and cooling liquid flows through the third flow passage from the first flow passage and then enters the second flow passage.

According to the engine cooling system of the embodiment of the utility model, the cooling liquid enters the exhaust side water jacket, the first flow passage in the exhaust side water jacket flows to absorb the heat of the exhaust side water jacket, the cooling liquid enters the cylinder cover after flowing through the exhaust side water jacket, the third flow passage in the cylinder cover flows to absorb the heat of the cylinder cover, the cooling liquid directly enters the cylinder cover to absorb the heat after flowing through the exhaust side water jacket, at the moment, the cooling liquid only absorbs the heat of the exhaust side water jacket, the temperature is raised, the heat of the cylinder cover is absorbed after the cooling liquid with lower temperature enters the cylinder cover, the cooling capacity of the cylinder cover is improved, the cooling liquid enters the intake side water jacket after flowing through the cylinder cover, the cooling liquid flows in the second flow passage in the intake side water jacket to absorb the heat of the intake side water jacket, the cooling liquid plays a cooling role on the nose bridge water jacket through the nose bridge area of the water jacket, and is selected to be intake side water jacket for cooling or preheating according to the working state of the intake side water jacket, when the temperature of the engine is low, the water jacket at the air inlet side can be preheated, the heating speed of the engine is increased, the starting efficiency of a vehicle is improved, connecting pipelines among cooling systems of the engine are reduced, the water jackets are directly communicated through water channels among the water jacket at the exhaust side, a cylinder cover and the water jacket at the air inlet side, the installation difficulty of the cooling water jacket is reduced, and the manufacturing efficiency is improved.

In addition, the engine cooling system according to the present invention may further have the following additional technical features:

further, the exhaust side water jacket comprises a plurality of first water sub-jackets, and the first flow passages are constructed by communicating the flow passages in the plurality of first water sub-jackets.

Further, the air inlet side water jacket comprises a plurality of second water sub-jackets, and the flow passages in the second water sub-jackets are communicated with each other to form the second flow passage.

Further, each first water sub-jacket is provided with a plurality of second water outlets, and the plurality of second water outlets are communicated with the third flow channel.

Further, in the engine cooling system, at least two of the second water outlets have different calibers; at least two of the second water inlets have different calibers.

Furthermore, each second water jacket is provided with a plurality of second water inlets, and the plurality of second water inlets are communicated with the third flow channel.

Further, the engine cooling system further includes: the water inlet part is arranged on the exhaust side water jacket, and a first water inlet communicated with the first flow channel is formed in the water inlet part; the water outlet part is arranged on the air inlet side water sleeve, and a first water outlet communicated with the second flow channel is formed in the water outlet part.

Further, the engine cooling system comprises two groups of cylinder bodies and two groups of cylinder covers, the water inlet part and the water outlet part are formed on the two groups of cylinder body water jackets and the two groups of cylinder cover water jackets, the two water outlet parts are connected, and the two connected water outlet parts jointly form the first water outlet.

Further, the cylinder body and the cylinder cover are cast and formed.

Furthermore, a temperature sensor is formed on the water outlet part.

Further, the cylinder head water jacket includes a cylinder head exhaust side, a cylinder head intake side, and a cylinder head nose bridge zone located between the cylinder head exhaust side and the cylinder head intake side, and the third flow passage is formed in at least one of the cylinder head intake side, the cylinder head exhaust side, and the cylinder head nose bridge zone.

Further, the third flow path includes: the first sub-runner is formed on the exhaust side of the cylinder cover; the second sub-flow passage is formed on the air inlet side of the cylinder cover; the first connecting flow passage is formed in a cylinder cover nose bridge area, the cylinder cover nose bridge area is located between the exhaust side of the cylinder cover and the air inlet side of the cylinder cover, and two ends of the first connecting flow passage are respectively communicated with the first sub-flow passage and the second sub-flow passage.

Further, the block water jacket further includes: the water jacket nose bridge area is arranged between the exhaust side water jacket and the intake side water jacket, a second connecting flow channel is formed in the water jacket nose bridge area, and two ends of the second connecting flow channel are respectively communicated with the first flow channel and the second flow channel.

The cooling liquid passing through the water jacket at the exhaust side directly enters the cylinder cover to cool the cylinder cover, the temperature of the cooling liquid is lower at the moment, and the cooling liquid with lower temperature absorbs the heat of the cylinder cover after entering the cylinder cover, so that the cooling capacity of the cooling liquid on the cylinder cover is improved; the air inlet side water jacket is selected to be cooled or preheated according to the working state of the air inlet side water jacket, and when the temperature of the engine is lower, the cooling liquid can preheat the air inlet side water jacket, so that the heating speed of the engine is increased, and the starting efficiency of the vehicle is improved; connecting pipelines among engine cooling systems are reduced, the connecting pipelines are directly communicated through water channels among the exhaust side water jacket, the cylinder cover and the intake side water jacket, the mounting difficulty of the cooling water jacket is reduced, and the manufacturing efficiency is improved.

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 an embodiment of the present invention;

FIG. 2 is a schematic structural view of a water jacket of an engine cooling system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another angle of the water jacket of the engine cooling system according to an embodiment of the present invention;

FIG. 4 is an external structural view of a water jacket of an engine cooling system according to an embodiment of the present invention;

reference numerals: 100-an engine cooling system;

1-cylinder water jacket; 11-exhaust side water jacket; 111-a first sub-water jacket; 112-a second water outlet;

12-an air inlet side water jacket; 121-a second sub-water jacket; 122-a second water inlet; 13-water jacket nose bridge zone;

2-cylinder cover water jacket; 21-exhaust side of cylinder head; 22-cylinder head inlet side; 23-cylinder head nose bridge area;

3-a first water inlet; 4-a first water outlet; 5-temperature sensor.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, 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 specifically defined otherwise.

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; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

An engine cooling system 100 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1, an engine cooling system 100 according to an embodiment of the present invention includes a block water jacket 1 and a cylinder head water jacket 2, the block water jacket 1 is connected to the cylinder head water jacket 2, the block water jacket 1 includes an exhaust side water jacket 11 and an intake side water jacket 12, the exhaust side water jacket 11 of the block water jacket 1 is connected to the intake side water jacket 12 to form a water jacket, but the exhaust side water jacket 11 is not directly communicated with the inside of the intake side water jacket 12, a first flow passage is formed in the exhaust side water jacket 11, the first flow passage is provided in the exhaust side water jacket 11 to provide a cooling passage for coolant, a second flow passage is formed in the intake side water jacket 12, and the second flow passage is provided in the intake side water jacket 12 to provide a cooling passage for coolant; a water jacket nose bridge area 13 is formed between the exhaust side water jacket 11 and the intake side water jacket 12, a second connecting flow passage respectively communicated with the first flow passage and the second flow passage is formed in the water jacket nose bridge area 13, and cooling liquid passes through the water jacket nose bridge area 13 and plays a role in cooling the water jacket nose bridge area 13; a third flow passage is formed in the cylinder head water jacket 2, the third flow passage is arranged in the cylinder head water jacket 2 and is used for providing a cooling passage for cooling liquid, the third flow passage is respectively communicated with the first flow passage and the second flow passage and is used for providing a passage for flowing of the cooling liquid, the cooling liquid flows through the third flow passage from the first flow passage and then enters the second flow passage, the flowing paths of the cooling liquid are the exhaust side water jacket 11, the cylinder head water jacket 2 and the intake side water jacket 12, the exhaust side water jacket 11, the cylinder head water jacket 2 and the intake side water jacket 12 are further sequentially cooled by the cooling liquid, and larger cooling capacity is provided for cooling the cylinder head water jacket 2.

According to the engine cooling system 100 of the embodiment of the utility model, the cooling liquid enters the exhaust side water jacket 11, the first flow passage in the exhaust side water jacket 11 flows to absorb the heat of the exhaust side water jacket 11, the cooling liquid enters the cylinder head water jacket 2 after flowing through the exhaust side water jacket 11, the third flow passage in the cylinder head water jacket 2 flows to absorb the heat of the cylinder head water jacket 2, the cooling liquid directly enters the cylinder head to absorb the heat after flowing through the exhaust side water jacket 11, the cooling liquid only absorbs the heat of the exhaust side water jacket 11 at the moment, the temperature is raised relatively low, the cooling liquid with lower temperature absorbs the heat of the cylinder head water jacket 2 after entering the cylinder head water jacket 2, the cooling capacity of the cooling liquid on the cylinder head water jacket 2 is improved, the cooling liquid enters the intake side water jacket 12 after flowing through the cylinder head, the cooling liquid flows in the second flow passage in the intake side water jacket 12 to absorb the heat of the intake side water jacket 12, and is selected as cooling or preheating for the intake side water jacket 12 according to the working state of the intake side water jacket 12, when the temperature of the engine is low, the water jacket 12 at the air inlet side can be preheated, the heating speed of the engine is increased, the starting efficiency of the vehicle is improved, connecting pipelines among the engine cooling system 100 are reduced, the water jackets are directly communicated through water channels among the water jacket 11 at the exhaust side, the water jacket 2 at the cylinder cover and the water jacket 12 at the air inlet side, the installation difficulty of the cooling water jacket is reduced, and the manufacturing efficiency is improved.

In the engine cooling system, at least two second water outlets in the plurality of second water outlets have different calibers; at least two of the second water inlets have different calibers, and the temperatures of the cylinder body and the cylinder cover are well balanced and cooled by setting the second water outlets and the second water inlets with different calibers to coordinate the temperatures of different positions of the cylinder body and the water jacket.

As shown in fig. 2 and 3, further, the exhaust side water jacket 11 includes a plurality of first water sub-jackets 111, and the flow passages in the plurality of first water sub-jackets 111 are communicated with each other to configure a first flow passage; the engine cooling system 100 is provided with the exhaust side water jacket 11, the first sub-water jackets 111 are connected to each other, and the first sub water jackets 111 are internally provided with communicated first flow passages, the communicated first flow passages in the first sub water jackets 111 provide cooling passages for cooling liquid, the cooling liquid sequentially passes through each first sub water jacket 111 through the first flow passages and then enters the third flow passages of the cylinder head water jackets 2, enters the cylinder head water jackets 2 and then cools the cylinder head water jackets 2, flows through the third flow passages from the first flow passages and then enters the second flow passages, so that the flow paths of the coolant are the exhaust side water jacket 11 and its first sub-water jacket 111, the head water jacket 2 and the intake side water jacket 12, the coolant then cools the exhaust side water jacket 11 and its first sub-water jacket 111, the cylinder head water jacket 2, and the intake side water jacket 12 in turn, providing greater cooling capacity for cooling the cylinder head water jacket 2.

The cooling liquid enters the exhaust side water jacket 11 and the first water jacket 111 thereof, the heat of the exhaust side water jacket 11 and the first water jacket 111 thereof is absorbed by flowing through the first flow passage in the exhaust side water jacket 11 and the first water jacket 111 thereof, the cooling liquid enters the cylinder head water jacket 2 after flowing through the exhaust side water jacket 11 and the first water jacket 111 thereof, the heat of the cylinder head water jacket 2 is absorbed by flowing through the third flow passage in the cylinder head water jacket 2, the heat of the cylinder head water jacket 2 is absorbed by directly entering the cylinder head after flowing through the exhaust side water jacket 11 and the first water jacket 111 thereof, at the moment, the heat of the exhaust side water jacket 11 and the water jacket thereof is absorbed by the cooling liquid, the temperature is relatively low, the heat of the cylinder head water jacket 2 is absorbed by the cooling liquid after entering the cylinder head water jacket 2, the cooling capacity of the cylinder head water jacket 2 by the cooling liquid is improved, and the heat is absorbed by entering the intake side water jacket 12 after flowing through the cylinder head water jacket 2.

As shown in fig. 3 and 4, further, the intake-side water jacket 12 includes a plurality of second water jackets 121, the flow passages in the plurality of second water jackets 121 are communicated with each other to form a second flow passage, the engine cooling system 100 is provided with the intake-side water jackets 12 according to the number of internal combustion engines provided for the vehicle, the second water jackets 121 are connected with each other, and the second water jackets 121 are formed with communicating second flow passages, the communicating second flow passages in the second water jackets 121 provide cooling passages for the coolant, the coolant passes through the first flow passages and enters the third flow passage of the cylinder head 22 after passing through each first water jacket 111 in sequence, the coolant passing through the cylinder head 22 enters the second flow passage, the coolant passes through each second water jacket 121 in sequence, so that the coolant passes through the exhaust-side water jacket 11 and its first water jacket 111, the cylinder head 2 and the intake-side water jacket 12 and its second water jacket 121, the coolant then cools the exhaust side water jacket 11 and its first sub-water jacket 111, the cylinder head water jacket 2, and the intake side water jacket 12 and its second sub-water jacket 121 in turn, providing greater cooling capacity for cooling the cylinder head water jacket 2.

As shown in fig. 1 and fig. 2, further, each first water jacket sub 111 has a plurality of second water outlets 112, each of the plurality of second water outlets 112 is communicated with a third flow passage, the coolant enters the exhaust-side water jacket 11 through the first flow passage and sequentially passes through each first water jacket sub 111, the coolant flows through the exhaust-side water jacket 11 and each first water jacket sub 111 and then enters the third flow passage of the cylinder head water jacket 2 through the second water outlets 112, and the cylinder head water jacket 2 is cooled after entering the cylinder head water jacket 2, so as to provide a greater cooling capacity for cooling the cylinder head water jacket 2.

As shown in fig. 1 and 3, each of the second water sub-jackets 121 further has a plurality of second water inlets 122, and the plurality of second water inlets 122 are communicated with the third flow passage. The cooling liquid enters the exhaust side water jacket 11 through the first flow passage and sequentially passes through each first sub water jacket 111, the cooling liquid flows through the exhaust side water jacket 11 and each first sub water jacket 111 and then enters a third flow passage of the cylinder head water jacket 2 through the second water outlet 112, the cylinder head water jacket 2 is cooled after entering the cylinder head water jacket 2, and the cooling liquid flows through the third flow passage from the first flow passage and then enters the second flow passage through the second water inlet 122, so that the flowing path of the cooling liquid is the exhaust side water jacket 11 and the first sub water jackets 111 thereof, the cylinder head water jacket 2 and the intake side water jacket 12, and greater cooling capacity is provided for cooling the cylinder head water jacket 2.

As shown in fig. 2 and 3, further, the engine cooling system 100 further includes: a water inlet part and a water outlet part, wherein the water inlet part is arranged on the exhaust side water jacket 11, and a first water inlet 3 communicated with the first flow passage is formed on the water inlet part; the cooling liquid enters the exhaust side water jacket 11 through the first water inlet 3, the heat of the exhaust side water jacket 11 is absorbed by flowing through a first flow passage in the exhaust side water jacket 11, the cooling liquid enters the cylinder cover water jacket 2 after flowing through the exhaust side water jacket 11, the heat of the cylinder cover water jacket 2 is absorbed by flowing through a third flow passage in the cylinder cover water jacket 2, and the cooling liquid directly enters the cylinder cover water jacket 2 to absorb the heat after flowing through the exhaust side water jacket 11; the water outlet part is arranged on the air inlet side water jacket 12, a first water outlet 4 communicated with a second flow channel is formed in the water outlet part, cooling liquid flows in the second flow channel in the air inlet side water jacket 12 to absorb heat of the air inlet side water jacket 12, the cooling liquid is discharged from the first water outlet 4 after passing through the air inlet side water jacket 12, the cooling liquid is discharged from the first water outlet 4 and enters a whole vehicle radiator at the front end of the engine, the whole water jacket is formed by casting, a water pipe does not need to be connected to the front end of the engine from the rear end of the engine, engine pipelines are reduced, cost is reduced, meanwhile, difficulty in engine arrangement is lowered, the engine cooling system 100 jointly uses the water inlet and the water outlet, difficulty in installation of the cooling water jacket is lowered, and manufacturing efficiency is improved.

As shown in fig. 1, further, the engine cooling system 100 includes two sets of cylinder body water jackets 1 and two sets of cylinder head water jackets 2, a water inlet portion and a water outlet portion are formed on each of the two sets of cylinder body water jackets 1 and the two sets of cylinder head water jackets 2, wherein the two water outlet portions are connected, a first water outlet 4 is formed on the two connected water outlet portions, the number of the engine cooling systems 100 is selected according to the number of the internal combustion engines of the vehicle, the vehicle running power is better matched, the internal combustion engines are cooled down integrally, the two engine cooling systems 100 share the first water outlet 4 to discharge cooling liquid, external pipelines are reduced, the installation difficulty of the cylinder body water jackets 1 is reduced, and the manufacturing efficiency is improved.

As shown in fig. 1, further, the cylinder water jacket 1 and the cylinder water jacket 2 are cast and formed, and the engine cooling system 100 is manufactured in a casting and forming manner, so that the installation difficulty is reduced, the internal flow channels are arranged in a communicated manner, external pipelines are reduced, and the processing difficulty and the processing cost are reduced.

As shown in fig. 4, a temperature sensor 5 is further formed on the water outlet portion, the water outlet temperature of the water outlet portion is measured by the temperature sensor 5, the flowing speed of the coolant is adjusted according to the current water outlet temperature, when the water outlet temperature is high and the heat of the engine cooling system 100 cannot be absorbed well, the flowing speed of the coolant is increased to accelerate the absorption of the heat of the engine cooling system 100 by the coolant, and when the water outlet temperature is low, the current flowing speed can meet or even exceed the heat absorption of the engine cooling system 100, the flowing speed of the coolant is decreased, and the energy loss is reduced.

As shown in fig. 1, further, the cylinder head water jacket 2 includes a cylinder head exhaust side 23, a cylinder head intake side 24 and a cylinder head nose bridge area 25 located between the cylinder head exhaust side 23 and the cylinder head intake side 24, the connection portion of the cylinder head exhaust side 23 and the cylinder head intake side 24 is cooled by providing the cylinder head nose bridge area 25, so as to enhance the cooling capability, a third flow passage is formed on at least one of the cylinder head intake side 24, the cylinder head exhaust side 23 and the cylinder head nose bridge area 25, and the cooling liquid flows in the third flow passage to cool the cylinder head water jacket 2.

Further, the third flow path includes: a first sub-flow passage, a second sub-flow passage and a first connecting flow passage, the first sub-flow passage being formed on the cylinder head exhaust side 23; the second sub-flow channel is formed on the cylinder head inlet side 24; the cooling liquid enters the exhaust side water jacket 11 through the first flow channel and sequentially passes through each first sub-water jacket 111, the cooling liquid flows through the exhaust side water jacket 11 and each first sub-water jacket 111 and then enters a third flow channel of the cylinder head water jacket 2 through the second water outlet 112, the cooling liquid in the third flow channel sequentially passes through the first sub-flow channel, the first connecting flow channel and the second sub-flow channel to cool the cylinder head water jacket 2, and the cooling liquid enters the second flow channel to cool the intake side water jacket 12 after passing through the second sub-flow channel, so that higher cooling capacity is provided for cooling the cylinder head water jacket 2.

As shown in fig. 1, the first connecting flow passage is formed in the cylinder head nose bridge area 25, the cylinder head nose bridge area 25 is located between the cylinder head exhaust side 23 and the cylinder head intake side 24, two ends of the first connecting flow passage are respectively communicated with the first sub-flow passage and the second sub-flow passage, the cylinder head water jacket 2 is cooled by the cooling liquid in the third flow passage sequentially through the first sub-flow passage, the first connecting flow passage and the second sub-flow passage, and the cooling liquid passing through the first connecting flow passage cools the cylinder head nose bridge area 25, so as to provide a greater cooling capacity for cooling the cylinder head water jacket 2.

As shown in fig. 2, further, the block water jacket 1 further includes: the water jacket nose bridge area 13 is arranged between the exhaust side water jacket 11 and the intake side water jacket 12, a second connecting flow passage is formed in the water jacket nose bridge area 13, two ends of the second connecting flow passage are respectively communicated with the first flow passage and the second flow passage, cooling liquid entering the first flow passage enters the water jacket nose bridge area 13 through the second connecting flow passage to cool the water jacket nose bridge area 13, and the cooling liquid enters the intake side water jacket 12 after passing through the water jacket nose bridge area 13 to cool the intake side water jacket 12, so that the cylinder body is cooled more efficiently.

According to the engine cooling system 100 provided by the embodiment of the utility model, the cooling liquid passing through the exhaust side water jacket 11 directly enters the cylinder cover water jacket 2 to cool the cylinder cover water jacket 2, at the moment, the temperature of the cooling liquid is lower, and the cooling liquid with lower temperature enters the cylinder cover water jacket 2 to absorb the heat of the cylinder cover water jacket 2, so that the cooling capacity of the cooling liquid on the cylinder cover water jacket 2 is improved; the cooling or preheating of the water jacket 12 at the air inlet side is selected according to the working state of the water jacket 12 at the air inlet side, and when the temperature of the engine is lower, the cooling liquid can preheat the water jacket 12 at the air inlet side, so that the heating speed of the engine is increased, and the starting efficiency of the vehicle is improved; connecting pipelines among the engine cooling systems 100 are reduced, and the exhaust side water jacket 11, the cylinder cover water jacket 2 and the intake side water jacket 12 are directly communicated through water channels, so that the installation difficulty of the cylinder body water jacket 1 is reduced, and the manufacturing efficiency is improved.

In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean 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 utility model. 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, comprising:

the cylinder body water jacket (1), the cylinder body water jacket (1) comprises an exhaust side water jacket (11) and an intake side water jacket (12), a first flow passage is formed in the exhaust side water jacket (11), a second flow passage is formed in the intake side water jacket (12), a water jacket nose bridge area (13) is formed between the exhaust side water jacket (11) and the intake side water jacket (12), and a second connecting flow passage communicated with the first flow passage and the second flow passage is formed in the water jacket nose bridge area (13);

the cylinder cover water jacket (2) is internally provided with a third flow passage, the third flow passage is respectively communicated with the first flow passage and the second flow passage, one part of cooling liquid flows through the third flow passage from the first flow passage and then enters the second flow passage, and the other part of cooling liquid flows through the second connecting flow passage from the first flow passage and then enters the second flow passage.

2. Engine cooling system according to claim 1,

the exhaust side water jacket (11) comprises a plurality of first water sub-jackets (111), and the first flow passages are formed by mutually communicating flow passages in the plurality of first water sub-jackets (111);

the air inlet side water jacket (12) comprises a plurality of second water sub-jackets (121), and the flow passages in the second water sub-jackets (121) are communicated with each other to form the second flow passages.

3. Engine cooling system according to claim 2,

each first water sub-jacket (111) is provided with a plurality of second water outlets (112), and the plurality of second water outlets (112) are communicated with the third flow channel;

each second water sub-jacket (121) is provided with a plurality of second water inlets (122), and the plurality of second water inlets (122) are communicated with the third flow channel.

4. Engine cooling system according to claim 3,

at least two of the second water outlets have different calibers;

at least two of the second water inlets have different calibers.

5. The engine cooling system of claim 1, further comprising:

a water inlet portion provided on the exhaust side water jacket (11), the water inlet portion being formed with a first water inlet (3) communicating with the first flow passage;

and the water outlet part is arranged on the air inlet side water jacket (12), and a first water outlet (4) communicated with the second flow passage is formed in the water outlet part.

6. Engine cooling system according to claim 5, characterized in that it comprises two sets of said block water jackets (1) and two sets of said cylinder head water jackets (2), said water inlet portion and said water outlet portion being formed on both sets of said block water jackets (1) and said cylinder head water jackets (2), wherein two of said water outlet portions are connected, and said first water outlet (4) is formed on both of said connected water outlet portions.

7. Engine cooling system according to any one of claims 1-6, characterized in that the block water jacket (1) and the head water jacket (2) are cast.

8. Engine cooling system according to claim 5, characterized in that a temperature sensor (5) is formed on the water outlet portion.

9. Engine cooling system according to claim 1, characterized in that the head jacket (2) comprises a head outlet side (23), a head inlet side (24) and a head nose bridge area (25) between the head outlet side (23) and the head inlet side (24), the third flow channel being formed on at least one of the head inlet side (24), the head outlet side (23) and the head nose bridge area (25).

10. The engine cooling system of claim 1, wherein the third flow passage comprises:

a first sub-flow passage formed on a cylinder head exhaust side (23);

a second sub-channel formed on the cylinder head intake side (24);

and the first connecting flow channel is formed in a cylinder cover nose bridge area (25), the cylinder cover nose bridge area (25) is positioned between the exhaust side (23) of the cylinder cover and the air inlet side (24) of the cylinder cover, and two ends of the first connecting flow channel are respectively communicated with the first sub flow channel and the second sub flow channel.