CN114562378A

CN114562378A - Engine cylinder head, engine and automobile

Info

Publication number: CN114562378A
Application number: CN202210212335.4A
Authority: CN
Inventors: 赖钧明; 刘爽; 吴世友; 孟繁臣; 周洪阳
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-05-31
Anticipated expiration: 2042-03-04
Also published as: CN114562378B

Abstract

The engine cylinder cover comprises a cylinder cover body and a partition plate, wherein a cooling water jacket is arranged in the cylinder cover body, a fuel injector mounting hole communicated with the cooling water jacket, two air inlets and two air outlets which are arranged around the periphery of the fuel injector mounting hole at intervals are arranged on a bottom plate, an air inlet nose bridge area is formed between the two air inlets, and a row exhaust nose bridge area is formed between the two air outlets; the partition plate is arranged in the cylinder cover body, opposite to the bottom plate and arranged at intervals, a communication channel is arranged on the partition plate, the communication channel comprises a first channel corresponding to the nose bridge inlet area and a second channel corresponding to the nose bridge exhaust area, the cross section area of the first channel is smaller than that of the second channel along a first direction, and the first direction is the direction of the upper-layer water jacket pointing to the lower-layer water jacket. This application pertinence ground has improved the cooling water flow who arranges the nose bridge district through flowing through for arrange the cooling rate in nose bridge district.

Description

Engine cylinder head, engine and automobile

Technical Field

The application relates to the technical field of engines, in particular to an engine cylinder cover, an engine and an automobile.

Background

The engine cylinder head is an important part in an automobile engine and functions to seal a cylinder and form a combustion space together with a piston. In order to ensure the flow area of the air passage, a plurality of air inlets and a plurality of air outlets are generally arranged in the engine cylinder head, and in the working process of the engine, the temperatures of the areas between different air inlets and different air outlets are different, wherein the temperature of the position of a discharge nose bridge area between adjacent air outlets is the highest, thermal fatigue stress cracking is most likely to occur, and therefore, how to rapidly cool the discharge nose bridge area in the engine cylinder head is called as an urgent problem to be solved.

Disclosure of Invention

Based on this, it is necessary to provide an engine cylinder head, an engine and an automobile for solving the problem of how to rapidly cool down a bank nose bridge region in the engine cylinder head.

According to one aspect of the present application, an embodiment of the present application provides an engine cylinder head, comprising: the cylinder cover body comprises a bottom plate, a cooling water jacket is arranged in the cylinder cover body, a fuel injector mounting hole communicated with the cooling water jacket, two air inlets and two air outlets which are arranged around the periphery of the fuel injector mounting hole at intervals, an inlet nose bridge area is formed between the two air inlets, and a row-exhaust nose bridge area is formed between the two air outlets; and the partition plate is arranged in the cylinder cover body, is opposite to the bottom plate and is arranged at intervals, divides the cooling water jacket into an upper-layer water jacket and a lower-layer water jacket, and is provided with a communication channel for communicating the upper-layer water jacket with the lower-layer water jacket, the communication channel comprises a first channel corresponding to the nose inlet area and a second channel corresponding to the nose discharge area, the cross-sectional area of the first channel is smaller than that of the second channel along a first direction, and the first direction is the direction in which the upper-layer water jacket points to the lower-layer water jacket.

In one embodiment, a first air inlet and outlet nose bridge area is formed between one air inlet and one air outlet, and a second air inlet and outlet nose bridge area is formed between the other air inlet and the other air outlet; the communication channel also comprises a third channel corresponding to the first intake and exhaust nose bridge area and a fourth channel corresponding to the second intake and exhaust nose bridge area; along the first direction, the cross-sectional area of the third channel is larger than that of the first channel and smaller than that of the second channel; the cross-sectional area of the fourth channel is greater than the cross-sectional area of the first channel and less than the cross-sectional area of the second channel along the first direction.

In one embodiment, the cylinder head body is provided with a water inlet communicated with the cooling water jacket, and the cylinder head body is internally provided with a water guide rib at the position of the water inlet so as to guide water flow entering the cooling water jacket from the water inlet to the first inlet and outlet nose bridge area.

In one embodiment, the cross-sectional area of the third channel is smaller than the cross-sectional area of the fourth channel along the first direction.

In one embodiment, the water inlet is communicated with the lower water jacket; the cylinder cover body is also provided with a water outlet communicated with the upper water jacket.

In one embodiment, the number of the water outlets is two, the two water outlets are respectively positioned at two opposite sides of the cylinder cover body along a second direction, and the second direction is not parallel to the first direction.

In one embodiment, the partition plate comprises a connecting part and an extending part, two sides of the connecting part are respectively connected with the side wall of the cylinder cover body and the extending part, and the communication channel is arranged on the extending part; the connecting part is arranged in an inclined way towards the lower-layer water jacket from the side connected with the cylinder cover body to the side connected with the extending part.

In one embodiment, the engine cylinder head further comprises a rib plate connected between the bottom plate and the side wall of the cylinder head body, and the rib plate and the connecting part are arranged opposite to each other and at intervals.

According to another aspect of the present application, an embodiment of the present application provides an engine, including: a cylinder; and the engine cylinder head as described above, the engine cylinder head being provided to the cylinder.

According to yet another aspect of the present application, an embodiment of the present application provides an automobile, including: such as the engine described above.

Based on engine cylinder lid, engine and car of this application embodiment, through setting up the cross sectional area that is less than the cross sectional area of the second passageway that is corresponding to row's nose bridge district corresponding to the first passageway that advances the nose bridge district on the baffle, so, when the cooling water in the engine cylinder lid is advancing the nose bridge district and flowing to first passageway, the resistance that receives is great relatively, then the cooling water flow that advances the nose bridge district is less relatively, simultaneously, the cooling water is when arranging the nose bridge district and flowing to the second runner, the resistance that receives is less relatively, then the cooling water flow that arranges the nose bridge district is great relatively through, the cooling water flow that arranges the nose bridge district has improved to flow through pertinence, accelerated the cooling rate to row's nose bridge district.

Drawings

FIG. 1 is a cross-sectional view of a cylinder head of an engine according to an embodiment of the present application;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 4 is a schematic illustration of cooling water flow in an engine cylinder head provided in accordance with an embodiment of the present application;

FIG. 5 is a structural schematic diagram of a lower deck water jacket in an engine cylinder head according to an embodiment of the present application.

Reference numerals:

10: a cylinder head;

100: a body, 110: bottom plate, 111: injector mounting hole, 112: air inlet, 113: exhaust port, 114: entrance to the nasal bridge region, 115: row nasal bridge area, 116: first row nasal area, 117: second row nose bridge zone, 120: cooling water jacket, 121: upper water jacket, 122: lower water jacket, 130: water inlet, 140: water guide rib, 150: a water outlet;

200: separator, 210: communication passage, 211: first passage, 212: second channel, 213: third passage, 214: fourth channel, 220: connecting portion, 230: an extension portion;

300: a rib plate;

a: first direction, b: a second direction.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in 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 present application.

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 to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

In order to ensure the air passage flow area in the engine cylinder head, a plurality of air inlets and a plurality of air outlets are generally arranged in the engine cylinder head, and in the working process of an engine, the temperatures of areas between different air inlets and different air outlets are different, wherein the temperature of the position of a discharge nose bridge area between adjacent air outlets is the highest, thermal fatigue stress cracking is most likely to occur, and therefore, the problem that how to rapidly cool the discharge nose bridge area in the engine cylinder head is to be solved is called urgent.

Fig. 1 is a structural sectional view of a cylinder head 10 of an engine according to an embodiment of the present application, fig. 2 is a sectional view taken along a line a-a in fig. 1, and fig. 3 is a sectional view taken along a line B-B in fig. 1.

In order to at least partially solve the above problem, referring to fig. 1 to 3, an embodiment of the present application provides an engine cylinder head 10, where the engine cylinder head 10 includes a cylinder head 10 body 100 and a partition plate 200.

The cylinder head 10 body 100 comprises a base plate 110, a cooling water jacket 120 is arranged in the cylinder head 10 body 100, an injector mounting hole 111 communicated with the cooling water jacket 120 is formed in the base plate 110, two air inlets 112 and two air outlets 113 are arranged around the periphery of the injector mounting hole 111 at intervals, an air inlet nose bridge area 114 is formed between the two air inlets 112, and an exhaust nose bridge area 115 is formed between the two air outlets 113. The partition plate 200 is disposed in the cylinder head 10 body 100 and opposite to and spaced from the bottom plate 110, the partition plate 200 divides the cooling water jacket 120 into an upper water jacket 121 and a lower water jacket 122, the partition plate 200 is provided with a communication passage 210 for communicating the upper water jacket 121 and the lower water jacket 122, the communication passage 210 includes a first passage 211 corresponding to the inlet nose bridge region 114 and a second passage 212 corresponding to the outlet nose bridge region 115, a cross-sectional area of the first passage 211 is smaller than a cross-sectional area of the second passage 212 along a first direction a, the first direction a being a direction in which the upper water jacket 121 points to the lower water jacket 122.

The base plate 110 is a portion of the cylinder head 10 body 100 that contacts a combustion chamber of an engine, the injector mounting hole 111 of the base plate 110 is used for mounting an injector, and the intake port 112 and the exhaust port are used for mounting valves, so that fuel and air can respectively enter the combustion chamber of the engine to realize mixed combustion and generate power, during which, the region between the intake port 112 and the exhaust port 113 is affected by the high temperature of gas combustion and the high temperature of exhaust gas of the base plate 110, resulting in the temperature rise of the whole nose bridge region including the intake nose bridge region 114 and the exhaust nose bridge region 115, wherein the temperature is highest at the position of the exhaust nose bridge region 115 between adjacent exhaust ports 113, and therefore, the nose bridge region needs to be cooled.

The cooling water jacket 120 in the cylinder head 10 body 100 is used for cooling water to flow through to achieve a cooling effect, and the partition plate 200 divides the cooling water jacket 120 into an upper layer water jacket 121 and a lower layer water jacket 122, and in use, different cooling modes can be provided according to different flow directions of the cooling water. For example, the cooling water may pass through the communication channel 210 on the partition plate 200 via the upper layer water jacket 121 and then pass through the lower layer water jacket 122, or may pass through the communication channel 210 on the partition plate 200 via the lower layer water jacket 122 and then pass through the upper layer water jacket 121, which is not particularly limited in this embodiment.

In order to perform rapid cooling for the nose discharging bridge region 115, in the embodiment of the present invention, in the first direction a that is directed to the lower layer water jacket 122 along the upper layer water jacket 121, the cross-sectional area of the first passage 211 corresponding to the nose inlet bridge region 114 is made smaller than the cross-sectional area of the second passage 212 corresponding to the nose discharging bridge region 115, so that when the cooling water in the engine cylinder head 10 flows to the first passage 211 through the nose inlet bridge region 114, the resistance received by the cooling water is relatively large, the cooling water flowing through the nose inlet bridge region 114 is relatively small, and meanwhile, when the cooling water flows to the second passage through the nose discharging bridge region 115, the resistance received by the cooling water is relatively small, the cooling water flowing through the nose discharging bridge region 115 is relatively large, so that the cooling water flowing through the nose discharging bridge region 115 can be increased in a targeted manner, and the cooling speed of the nose discharging region 115 is increased.

It should be noted that the first direction a is a downward direction in fig. 1, in the first direction a, the cross-sectional shapes of the first channel 211 and the second channel 212 may be a regular pattern or an irregular pattern, and the cross-sectional shape of the first channel 211 and the cross-sectional shape of the second channel 212 may be the same or different, and are not particularly limited as long as the size relationship of the cross-sectional areas is satisfied.

The nose bridge region within the cylinder head 10 body 100 includes an inlet nose bridge region 114 between the two inlet ports 112 and an outlet nose bridge region 115 between the two outlet ports 113, except that in some embodiments, optionally, a first inlet and outlet nose bridge region 116 is formed between one of the inlet ports 112 and one of the outlet ports 113, and a second inlet and outlet nose bridge region 117 is formed between the other of the inlet ports 112 and the other of the outlet ports 113; the communication channel 210 further includes a third channel 213 corresponding to the first inlet and outlet nose bridge region 116, and a fourth channel 214 corresponding to the second inlet and outlet nose bridge region 117; the sectional area of the third channel 213 is larger than that of the first channel 211 and smaller than that of the second channel 212 in the first direction a; the cross-sectional area of the fourth channel 214 is larger than the cross-sectional area of the first channel 211 and smaller than the cross-sectional area of the second channel 212 in the first direction a.

That is, among the first, second, third and

fourth passages

211, 212, 213 and 214, the sectional area of the second passage 212 in the first direction a is the largest, the sectional area of the first passage 211 in the first direction a is the smallest, and the sectional areas of the third and

fourth passages

213 and 214 in the first direction a are moderate. Therefore, in this embodiment, the cooling water will experience the greatest resistance when flowing through the nose entrance area 114 to the first passage 211, the moderate resistance when flowing through the first nose entrance and exit area 116 to the third passage 213, and the second nose entrance and exit area 117 to the fourth passage 214, and the least resistance when flowing through the nose exit area 115 to the second passage, which, taken together, still provides the greatest flow of cooling water through the nose exit area 115 and the fastest cooling rate of the nose exit area 115.

FIG. 4 is a schematic illustration of the flow of cooling water in the engine cylinder head 10 provided by an embodiment of the present application.

Referring to fig. 1 to 4, in addition to the above embodiment, a water inlet 130 is disposed on the cylinder head 10 body 100 and is communicated with the cooling water jacket 120, and a water guiding rib 140 is disposed at the position of the water inlet 130 in the cylinder head 10 body 100 to guide the water flow entering the cooling water jacket 120 from the water inlet 130 to the first inlet/outlet bridge region 116.

The water inlet 130 is for inflow of cooling water to introduce the cooling water into the cooling water jacket 120. Since the first inlet and outlet nose bridge region 116 and the second inlet and outlet nose bridge region 117 are respectively located at opposite sides within the cooling water jacket 120, specifically, the water inlet 130 is located at a side of the cylinder head 10 body 100 close to the first inlet and outlet nose bridge region 116. Meanwhile, the water guide rib 140 is further arranged at the position of the water inlet 130, the water guide rib 140 can guide and distribute cooling water entering from the water inlet 130, and the reasonable arrangement of the positions of the air inlet 112 and the air outlet 113 is matched, so that water flow can flow in the cooling water jacket 120 along a specific direction, and cooling effect is achieved on all areas.

Illustratively, as shown in the drawing, the first inlet and outlet nose bridge region 116 is located on the left side of the axis of the water inlet 130, and at this time, the water guiding rib 140 is disposed on the right side of the water inlet 130, and the water guiding rib 140 is disposed obliquely to the left side of the water inlet 130, so that after the cooling water enters the cooling water jacket 120 from the water inlet 130, the cooling water rotates and flows in the counterclockwise direction under the action of the water guiding rib 140, and covers the first inlet and outlet nose bridge region 116, the outlet nose bridge region 115, the second inlet and outlet nose bridge region 117, and the inlet nose bridge region 114. Of course, in other embodiments, the flow direction of the cooling water may be any other direction, which is not described herein.

In some embodiments, optionally, the cross-sectional area of the third channel 213 is smaller than the cross-sectional area of the fourth channel 214 along the first direction a. Thus, when the cooling water flows to the third channel 213 through the first inlet/outlet nose bridge region 116, the resistance is relatively large, and the flow rate of the cooling water flowing through the first inlet/outlet nose bridge region 116 is relatively small, meanwhile, when the cooling water flows to the fourth flow channel through the second inlet/outlet nose bridge region 117, the resistance is relatively small, and the flow rate of the cooling water flowing through the second inlet/outlet nose bridge region 117 is relatively large, so that the flow rate of the cooling water flowing through the second inlet/outlet nose bridge region 117 is relatively increased, and the cooling speed of the second inlet/outlet nose bridge region 117 is increased.

As mentioned above, depending on the flow direction of the cooling water, different cooling manners are possible, and in some embodiments, the water inlet 130 is optionally communicated with the lower water jacket 122; the cylinder head 10 body 100 is further provided with a water outlet 150 communicated with the upper water jacket 121. That is, the cooling water in this embodiment passes through the lower layer water jacket 122, passes through the communication channel 210 on the partition plate 200, and then passes through the upper layer water jacket 121.

On the basis of the above embodiment, further, the number of the water outlets 150 is two, the two water outlets 150 are respectively located on two opposite sides of the cylinder head 10 body 100 along the second direction b, and the second direction b is not parallel to the first direction a. The second direction b is the right direction in fig. 5, and the cooling water in this embodiment has two different flow modes, one is to flow to the cylinder body water diversion pipe under the action of the water pump, to flow into different cylinder sleeves in multiple ways under the action of the water diversion pipe, to flow through the communication channel 210 on the partition plate 200 through the lower layer water jacket 122, to pass through the upper layer water jacket 121, and finally to return to the water pump to realize circulation. The other mode is that the water flows to a cylinder body shunt pipe under the action of the water pump, and the water flows into different cylinder sleeves in a multi-path manner under the action of the shunt pipe, passes through a communication channel 210 on the partition plate 200 through the lower layer water jacket 122, then passes through the upper layer water jacket 121, and finally returns to the water pump through a retarder to realize circulation. Different cooling water flow modes can be selected according to different finished automobile requirements, and the finished automobile adaptability is good.

The partition plate 200 is provided in the cylinder head 10 body 100 to divide the cooling water jacket 120 into the upper-stage water jacket 121 and the lower-stage water jacket 122, and in some embodiments, optionally, the partition plate 200 includes a connecting portion 220 and an extending portion 230, both sides of the connecting portion 220 are respectively connected with the side wall of the cylinder head 10 body 100 and the extending portion 230, and the communication passage 210 is provided on the extending portion 230; the connecting portion 220 is provided obliquely toward the lower water jacket 122 from the side connected to the head body 100 to the side connected to the extending portion 230. That is, the partition plate 200 forms a recessed funnel-shaped space surrounded by the connecting portion 220 and the extending portion 230 in the cooling water jacket 120, so that when the cylinder head 10 body 100 is subjected to explosion pressure, the funnel-shaped partition plate 200 can transmit stress to the support bolt holes, further enhancing the rigidity of the base plate 110.

In some embodiments, the engine cylinder head 10 further includes a rib plate 300 connected between the bottom plate 110 and the side wall of the cylinder head 10 body 100, and the rib plate 300 and the connecting portion 220 are opposite and spaced apart from each other. Similarly, when the cylinder head 10 body 100 is subjected to a detonation pressure, the rib plate 300 may also transmit the stress to the support bolt holes, further strengthening the base plate 110.

According to another aspect of the present application, embodiments of the present application provide an engine comprising a cylinder and an engine cylinder head 10 as described above, the engine cylinder head 10 covering the cylinder. By adopting the engine cylinder head 10, in the first direction a from the upper water jacket 121 to the lower water jacket 122, the cross-sectional area of the first passage 211 corresponding to the intake nose bridge region 114 is made smaller than the cross-sectional area of the second passage 212 corresponding to the exhaust nose bridge region 115, so that when the cooling water in the engine cylinder head 10 flows to the first passage 211 through the intake nose bridge region 114, the resistance is relatively large, the flow rate of the cooling water flowing through the intake nose bridge region 114 is relatively small, and meanwhile, when the cooling water flows to the second passage through the exhaust nose bridge region 115, the resistance is relatively small, the flow rate of the cooling water flowing through the exhaust nose bridge region 115 is relatively large, so that the flow rate of the cooling water flowing through the exhaust nose bridge region 115 can be improved in a targeted manner, and the cooling speed of the exhaust nose bridge region 115 is increased.

According to yet another aspect of the present application, an embodiment of the present application provides an automobile including an engine as described above. Because the engine is adopted, in the first direction a along which the upper water jacket 121 points to the lower water jacket 122, the cross-sectional area of the first passage 211 corresponding to the intake nose bridge region 114 is made smaller than the cross-sectional area of the second passage 212 corresponding to the exhaust nose bridge region 115, so that when the cooling water in the engine cylinder head 10 flows to the first passage 211 through the intake nose bridge region 114, the resistance is relatively large, the flow rate of the cooling water flowing through the intake nose bridge region 114 is relatively small, and meanwhile, when the cooling water flows to the second passage through the exhaust nose bridge region 115, the resistance is relatively small, the flow rate of the cooling water flowing through the exhaust nose bridge region 115 is relatively large, so that the flow rate of the cooling water flowing through the exhaust nose bridge region 115 can be pertinently increased, and the cooling speed of the exhaust nose bridge region 115 is increased.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An engine cylinder head, comprising:

the cylinder cover body comprises a bottom plate, a cooling water jacket is arranged in the cylinder cover body, a fuel injector mounting hole communicated with the cooling water jacket, two air inlets and two air outlets which are arranged around the periphery of the fuel injector mounting hole at intervals are arranged on the bottom plate, an air inlet nose bridge area is formed between the two air inlets, and a row discharge nose bridge area is formed between the two air outlets; and

the baffle, set up in the cylinder head body and with the bottom plate is relative and the interval sets up, the baffle will the cooling water jacket separates for upper water jacket and lower floor's water jacket, be equipped with on the baffle and be used for the intercommunication upper water jacket with the intercommunication passageway of lower floor's water jacket, the intercommunication passageway including corresponding to advance the first passageway in nose bridge district, and corresponding to arrange the second passageway in nose bridge district, along first direction, the cross sectional area of first passageway is less than the cross sectional area of second passageway, first direction is upper water jacket is directional the direction of lower floor's water jacket.

2. The engine cylinder head according to claim 1, wherein a first intake and exhaust nose bridge region is formed between one of the intake ports and one of the exhaust ports, and a second intake and exhaust nose bridge region is formed between the other of the intake ports and the other of the exhaust ports;

the communication channel also comprises a third channel corresponding to the first intake and exhaust nose bridge area and a fourth channel corresponding to the second intake and exhaust nose bridge area;

along the first direction, the cross-sectional area of the third channel is larger than that of the first channel and smaller than that of the second channel; along the first direction, the cross-sectional area of the fourth channel is larger than the cross-sectional area of the first channel and smaller than the cross-sectional area of the second channel.

3. The engine cylinder head according to claim 2, wherein a water inlet communicating with the cooling jacket is provided in the cylinder head body, and a water guide rib is provided in the cylinder head body at a position of the water inlet to guide a flow of water entering the cooling jacket from the water inlet to the first intake and exhaust nose bridge region.

4. The engine cylinder head of claim 3, wherein a cross-sectional area of the third passage is smaller than a cross-sectional area of the fourth passage in the first direction.

5. The engine cylinder head according to claim 3, wherein the water inlet communicates with the lower water jacket;

and the cylinder cover body is also provided with a water outlet communicated with the upper water jacket.

6. The engine cylinder head according to claim 5, wherein the number of the water outlets is two, the two water outlets being respectively located on opposite sides of the cylinder head body in a second direction that is not parallel to the first direction.

7. The engine cylinder head according to claim 1, wherein the bulkhead includes a connecting portion and an extending portion, both sides of the connecting portion being connected with the side wall of the cylinder head body and the extending portion, respectively, the communication passage being provided on the extending portion;

the connecting part is arranged in an inclined mode towards the direction of the lower-layer water jacket from the side connected with the cylinder cover body to the side connected with the extending part.

8. The engine cylinder head according to claim 7, further comprising a rib plate connected between the bottom plate and the side wall of the cylinder head body, the rib plate and the connecting portion being opposed to each other and spaced apart.

9. An engine, comprising:

a cylinder; and

an engine cylinder head according to any one of claims 1 to 8, which is provided to the cylinder.

10. An automobile, comprising:

the engine of claim 9.