CN216111031U - Cooling water jacket of cylinder head, engine and vehicle - Google Patents

Abstract

The utility model provides a cooling water jacket of a cylinder head, an engine and a vehicle, wherein the cooling water jacket comprises: the main body water jacket is positioned on the lower side of the exhaust manifold; the first layer of water jacket is positioned on the upper side of the exhaust manifold; the second layer of water jacket comprises an exhaust valve intermediate water jacket, the exhaust valve intermediate water jacket is communicated with the first layer of water jacket and the main body water jacket, and after the refrigerant in the second layer of water jacket is divided by the exhaust valve intermediate water jacket, one part of the refrigerant is suitable for flowing into the main body water jacket, and the other part of the refrigerant is suitable for flowing into the first layer of water jacket. Therefore, through the cooling water jacket, the refrigerant in the second layer water jacket can flow into the first layer water jacket to cool the exhaust channel, and the refrigerant in the second layer water jacket can also flow into the main body water jacket to cool the exhaust channel, so that the heat load of the cylinder cover can be effectively reduced, the local thermal stress concentration of the cylinder cover can be avoided, the hidden troubles of thermal fatigue, cracks and the like of the cylinder cover can be avoided, and the service performance of the engine can be ensured.

Description

Cooling water jacket of cylinder head, engine and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a cooling water jacket of a cylinder cover, an engine with the cooling water jacket of the cylinder cover and a vehicle.

Background

In the related art, after an exhaust manifold of an engine and a cylinder head of the engine are integrally arranged, the heat load of the cylinder head is increased by at least 10% -20%, so that the heat load of the cylinder head is high, the cylinder head is prone to local thermal stress concentration, and hidden dangers such as thermal fatigue and cracks are prone to generating, and the service performance of the engine is affected.

However, if the capacity of the engine cooling system is increased by increasing the flow rate of the cooling water pump to reduce the heat load of the cylinder head, the cooling efficiency of the cooling system is not improved after the flow rate of the cooling water pump is increased to a certain extent, and thus the heat load of the cylinder head cannot be effectively reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a cooling water jacket for a cylinder head, which can effectively reduce a thermal load of the cylinder head, avoid local thermal stress concentration of the cylinder head, and avoid hidden troubles such as thermal fatigue and cracks of the cylinder head, so as to ensure usability of an engine.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a cooling water jacket of a cylinder head, comprising: a body water jacket located at a lower side of the exhaust manifold; a first layer of water jacket located on the upper side of the exhaust manifold; the second-layer water jacket comprises an exhaust valve intermediate water jacket, the exhaust valve intermediate water jacket is positioned between two adjacent exhaust valves, the exhaust valve intermediate water jacket is communicated with the first-layer water jacket and the main body water jacket, and after the refrigerant in the second-layer water jacket is divided by the exhaust valve intermediate water jacket, one part of the refrigerant is suitable for flowing into the main body water jacket, and the other part of the refrigerant is suitable for flowing into the first-layer water jacket.

In some examples of the utility model, the second layer water jacket further comprises: a first intake valve water jacket and a second intake valve water jacket, both disposed around the intake valve.

In some examples of the utility model, the second layer water jacket further comprises: the water holes on the air inlet sides of the multiple groups are communicated with the water jacket of the second air inlet valve.

In some examples of the utility model, the second layer water jacket further comprises: the water jacket of the oil injector is arranged around the oil injector and/or the pre-combustion chamber, the water jacket of the spark plug is arranged around the spark plug, the first intake valve water jacket is communicated with the water jacket of the oil injector, and the second intake valve water jacket is communicated with the water jacket of the spark plug.

In some examples of the utility model, the injector water jacket is in communication with the spark plug water jacket and the injector water jacket is in communication with the exhaust valve intermediate water jacket.

In some examples of the utility model, the second layer water jacket further comprises: the exhaust valve water jacket is arranged around the exhaust valve and communicated with the exhaust valve intermediate water jacket, and the exhaust valve intermediate water jacket is communicated with the first layer water jacket and the main body water jacket through the exhaust valve water jacket; the exhaust valve water jacket is provided with a first communicating hole and a second communicating hole, the first communicating hole is communicated with the main body water jacket, and the second communicating hole is communicated with the first layer water jacket.

In some examples of the present invention, the second communication hole has a diameter a, and satisfies the relationship 10mm ≧ a ≧ 6 mm.

In some examples of the utility model, the second layer water jacket further comprises: and the water hole on the exhaust side is communicated with the first communicating hole.

Compared with the prior art, the cooling water jacket of the cylinder head has the following advantages:

according to the cooling water jacket of the cylinder cover, through the cooling water jacket, the refrigerant in the second layer of water jacket can flow into the first layer of water jacket to cool the exhaust channel, and the refrigerant in the second layer of water jacket can also flow into the main body water jacket to cool the exhaust channel, so that the heat load of the cylinder cover can be effectively reduced, the cylinder cover can be prevented from generating local thermal stress concentration, the cylinder cover can be prevented from generating hidden dangers such as thermal fatigue, cracks and the like, and the service performance of an engine can be ensured.

Another object of the present invention is to provide an engine.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

an engine comprises the cooling water jacket of the cylinder head.

The engine and the cooling water jacket of the cylinder head have the same advantages compared with the prior art, and the detailed description is omitted.

Another object of the utility model is to propose a vehicle.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a vehicle comprises the engine.

The vehicle has the same advantages of the engine compared with the prior art, and the detailed description is omitted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of a cooling water jacket according to an embodiment of the present invention;

FIG. 2 is a schematic view of a body water jacket and a second layer water jacket according to an embodiment of the present invention;

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

FIG. 4 is a schematic view of a cylinder head according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a cylinder head according to an embodiment of the present invention;

fig. 6 is a schematic view of a head gasket according to an embodiment of the present invention.

Description of reference numerals:

a cylinder head 100; a cooling water jacket 200;

a body water jacket 10; a first layer of water jacket 11;

a second-layer water jacket 20; an exhaust valve intermediate water jacket 21; a first intake valve water jacket 22; a second intake valve water jacket 23; an intake side upper water hole 24; a main upper water hole 25; an auxiliary upper water hole 26; a fuel injector water jacket 27; a spark plug water jacket 28; an exhaust valve water jacket 29; the second communication hole 32; an exhaust side upper water hole 33;

a cylinder head gasket 40; intake side avoidance holes 41; the exhaust side relief hole 42.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 6, a cooling water jacket 200 of a cylinder head 100 according to an embodiment of the present invention includes: a body water jacket 10, a first layer water jacket 11 and a second layer water jacket 20.

The body water jacket 10 is located on the lower side of the exhaust manifold, the first layer water jacket 11 is located on the upper side of the exhaust manifold, the second layer water jacket 20 is arranged to be communicated with the first layer water jacket 11, the second layer water jacket 20 is arranged to be communicated with the body water jacket 10, part of the refrigerant in the second layer water jacket 20 is suitable for flowing into the body water jacket 10 to cool the exhaust passage (exhaust manifold) in the cylinder head 100, and the other part of the refrigerant in the second layer water jacket 20 is suitable for flowing into the first layer water jacket 11 to cool the exhaust passage (exhaust manifold) in the cylinder head 100.

Alternatively, as an embodiment of the present invention, the first-layer water jacket 11 is provided in communication with the body water jacket 10, the first-layer water jacket 11 may be configured as an upper-layer water jacket of the cylinder head 100, the second-layer water jacket 20 may be configured as a lower-layer water jacket of the cylinder head 100, and, in the height direction of the engine, as shown in fig. 3, the second-layer water jacket 20 may be located below the first-layer water jacket 11, the body water jacket 10 may be used to cool the lower side of the exhaust passage in the cylinder head 100, and the first-layer water jacket 11 may be used to cool the upper side of the exhaust passage in the cylinder head 100.

It is understood that the cooling jacket 200 of the cylinder head 100 is provided inside the cylinder head 100, in other words, the cooling jacket 200 of the cylinder head 100 is defined by the cylinder head 100. The engine includes a cylinder head 100 and a cylinder block, the cylinder head 100 is disposed above the cylinder block in a height direction of the engine, and a head gasket 40 is disposed between the cylinder head 100 and the cylinder block.

In the prior art, after an exhaust manifold of an engine and a cylinder head of the engine are integrally arranged, the heat load of the cylinder head is increased by at least 10% -20%, so that the heat load of the cylinder head is high, the cylinder head is easy to generate local thermal stress concentration, and hidden dangers such as thermal fatigue and cracks are easy to generate, so that the service performance of the engine can be influenced. However, if the capacity of the engine cooling system is increased by increasing the flow rate of the cooling water pump to reduce the heat load of the cylinder head, the cooling efficiency of the cooling system is not improved after the flow rate of the cooling water pump is increased to a certain extent, so that the heat load of the cylinder head cannot be effectively reduced, and the development cost and the procurement cost of the cooling water pump are increased by using the high-flow cooling water pump, so that the manufacturing cost of the engine is high.

In the present application, by configuring the cooling water jacket 200 in the form of a structure including the body water jacket 10, the first-layer water jacket 11, and the second-layer water jacket 20, part of the refrigerant in the second-layer water jacket 20 can flow into the first-layer water jacket 11, to cool the upper side of the exhaust passage in the cylinder head 100, and, another part of the refrigerant in the second-stage water jacket 20 may flow into the body water jacket 10, to cool the lower side of the exhaust passage in the cylinder head 100, thus, the overall arrangement form of the cooling water jacket 200 of the present application can be made reasonable, the water flow form in the cooling water jacket 200 can be made reasonable, thereby effectively reducing the heat load of the cylinder cover 100, avoiding the hidden troubles of thermal fatigue, cracks and the like of the cylinder cover 100, ensuring the service performance of the engine, moreover, the cooling water jacket 200 of the present application does not substantially increase the manufacturing cost of the engine, thereby not causing a high cost.

Therefore, through the cooling water jacket 200 of the present application, the refrigerant in the second layer water jacket 20 can flow into the first layer water jacket 11 to cool the exhaust passage, and the refrigerant in the second layer water jacket 20 can also flow into the main body water jacket 10 to cool the exhaust passage, so that the heat load of the cylinder head 100 can be effectively reduced, the local thermal stress concentration of the cylinder head 100 can be avoided, the hidden troubles of thermal fatigue, cracks and the like of the cylinder head 100 can be avoided, and the service performance of the engine can be ensured.

Further, as shown in fig. 2, the second-layer water jacket 20 may include: the exhaust valve intermediate water jacket 21 is arranged to be communicated with the main body water jacket 10, the exhaust valve intermediate water jacket 21 is arranged to be communicated with the first layer water jacket 11, the refrigerant in the second layer water jacket 20 can be split by the exhaust valve intermediate water jacket 21 to flow into the main body water jacket 10 and the first layer water jacket 11, specifically, part of the refrigerant in the second layer water jacket 20 can flow into the main body water jacket 10, and the other part of the refrigerant in the second layer water jacket 20 can flow into the first layer water jacket 11.

Alternatively, the exhaust valve intermediate water jackets 21 may be provided in correspondence with the cylinders of the engine, for example, as shown in fig. 2, if the engine is a four-cylinder engine and two exhaust valves are provided in correspondence with each cylinder, the number of the exhaust valve intermediate water jackets 21 may be set to four, the four exhaust valve intermediate water jackets 21 may be provided in one-to-one correspondence with the four cylinders, and each exhaust valve intermediate water jacket 21 may be provided between the corresponding two exhaust valves. Of course, the engine may also be a three-cylinder engine or a six-cylinder engine, which is not limited in this application.

The arrangement can lead the refrigerant in the second layer water jacket 20 to be collected to the exhaust valve intermediate water jacket 21, lead the refrigerant in the second layer water jacket 20 to be shunted from the exhaust valve intermediate water jacket 21 to flow into the main body water jacket 10 and the first layer water jacket 11, ensure that the sufficient refrigerant in the main body water jacket 10 cools the lower side of the exhaust channel in the cylinder cover 100, and also ensure that the sufficient refrigerant in the first layer water jacket 11 cools the upper side of the exhaust channel in the cylinder cover 100, thereby ensuring that the cooling water jacket 200 can effectively cool the exhaust channel in the cylinder cover 100, effectively reducing the heat load of the cylinder cover 100, avoiding the local thermal stress concentration of the cylinder cover 100, avoiding the hidden troubles of thermal fatigue, cracks and the like of the cylinder cover 100, and ensuring the service performance of the engine.

In some embodiments of the present invention, as shown in fig. 2 and 3, the second layer water jacket 20 may further include: the first intake valve water jacket 22 and the second intake valve water jacket 23, and the first intake valve water jacket 22 and the second intake valve water jacket 23 can be arranged around an intake valve of the engine, and a refrigerant can flow through the first intake valve water jacket 22 and the second intake valve water jacket 23 to cool the intake valve of the engine. The arrangement can effectively cool the intake valve of the engine, thereby reducing the temperature of the gas entering the cylinder cover 100, being beneficial to improving the air input of the engine and being beneficial to improving the working performance of the engine.

In some embodiments of the present invention, as shown in fig. 2-4, the second layer water jacket 20 may further include: the plurality of sets of inlet side water supply holes 24, alternatively, as shown in fig. 4, if the engine is a four-cylinder engine, the second layer water jacket 20 may include four sets of inlet side water supply holes 24, and the four sets of inlet side water supply holes 24 may be provided in one-to-one correspondence with four cylinders, and each set of inlet side water supply holes 24 may include a main water supply hole 25 and an auxiliary water supply hole 26, where the main water supply hole 25 may be provided in communication with the first inlet valve water jacket 22, and the auxiliary water supply hole 26 may be provided in communication with the second inlet valve water jacket 23.

It is understood that the refrigerant in the cylinder block of the engine may flow into the second-layer water jacket 20 through the intake-side upper water hole 24, specifically, the refrigerant in the cylinder block of the engine may flow into the first intake-valve water jacket 22 through the main upper water hole 25, and the refrigerant in the cylinder block of the engine may also flow into the second intake-valve water jacket 23 through the auxiliary upper water hole 26.

Optionally, as shown in fig. 2, each group of the inlet side water holes 24 may include a main water hole 25 and two auxiliary water holes 26, one main water hole 25 may be located between the two auxiliary water holes 26, and each auxiliary water hole 26 may be communicated with one second inlet valve water jacket 23, so that the structural style of the second layer water jacket 20 may be reasonable, and the refrigerant flowing into the second layer water jacket 20 through the inlet side water holes 24 may cool the inlet valve of the engine, thereby further reducing the temperature of the gas entering the cylinder head 100, facilitating further improving the air intake amount of the engine, and further improving the working performance of the engine.

Of course, the specific form of the inlet side water holes 24 may be arranged according to actual requirements, and is not limited to the above-described form, for example, when the engine is a longitudinal engine, as shown in fig. 4, the inlet side water holes 24 at the front end (i.e., in the left-right direction shown in fig. 4, the inlet side water holes 24 at the left end, or the inlet side water holes 24 farthest from the cab may be configured as an integral large hole, so that the arrangement may not only ensure that the water feeding area of the group of inlet side water holes 24 is the same as that of the other groups of inlet side water holes 24, but also may avoid other structures of the engine, thereby facilitating the arrangement of other structures of the engine.

In some embodiments of the present invention, as shown in fig. 2 and 3, the second layer water jacket 20 may further include: a fuel injector water jacket 27 and a spark plug water jacket 28, the fuel injector water jacket 27 may be disposed around the fuel injector and/or the pre-chamber, and the spark plug water jacket 28 may be disposed around the spark plug. Also, the first intake valve water jacket 22 may be provided in communication with a fuel injector water jacket 27, which fuel injector water jacket 27 may be used to cool the pre-chamber and/or fuel injector. Specifically, coolant within the cylinder block of the engine may flow into the first intake valve water jacket 22 through the main fill hole 25, and coolant within the first intake valve water jacket 22 may flow into the injector water jacket 27 to cool the prechamber and/or the injector.

Also, the second intake valve water jacket 23 may be provided in communication with the plug water jacket 28, and the plug water jacket 28 may be used to cool the main combustion chamber spark plug, specifically, the refrigerant in the cylinder block of the engine may flow into the second intake valve water jacket 23 through the auxiliary fill hole 26, and the refrigerant in the second intake valve water jacket 23 may flow into the plug water jacket 28 to cool the main combustion chamber spark plug. The arrangement can effectively cool the spark plug, the pre-combustion chamber and the oil injector, and can avoid overhigh temperature of the spark plug, the pre-combustion chamber and the oil injector, thereby reducing the temperature transmitted by the spark plug, the pre-combustion chamber and the oil injector to the cylinder cover 100 and ensuring the use reliability of the cylinder cover 100.

Further, an injector water jacket 27 may be provided in communication with the spark plug water jacket 28, and coolant within the spark plug water jacket 28 may flow into the injector water jacket 27 to cool the pre-chamber and the injector. It should be explained that, when the engine is in operation, the temperature of the pre-combustion chamber can reach 700 ℃ to 900 ℃ at most, and the fuel injector water jacket 27 is communicated with the spark plug water jacket 28, so that the coolant in the spark plug water jacket 28 can flow into the fuel injector water jacket 27, and all the coolant flowing into the second layer water jacket 20 through the air inlet side upper water hole 24 can flow through the fuel injector water jacket 27, thereby effectively cooling the pre-combustion chamber, and avoiding local thermal stress concentration of the cylinder cover 100.

In addition, the arrangement can ensure that the flow velocity of the refrigerant in the water jacket 27 of the oil injector reaches 3.5-5 m/s, so that the pre-combustion chamber can be cooled more effectively, the local thermal stress concentration of the cylinder cover 100 can be further avoided, and the service performance of the engine can be ensured.

Further, the injector water jacket 27 may be communicated with the exhaust valve intermediate water jacket 21, and it is understood that all the refrigerants flowing into the second layer water jacket 20 through the intake side upper water hole 24 can flow through the injector water jacket 27, and the refrigerants in the injector water jacket 27 can flow to the exhaust valve intermediate water jacket 21 by communicating the injector water jacket 27 with the exhaust valve intermediate water jacket 21, so that all the refrigerants in the second layer water jacket 20 can flow into the exhaust valve intermediate water jacket 21. The arrangement can ensure reasonable water flow form of the refrigerant in the cooling water jacket 200 and smooth circulation of the refrigerant.

In some embodiments of the present invention, as shown in fig. 2, the second-layer water jacket 20 may further include an exhaust valve water jacket 29, the exhaust valve water jacket 29 may be disposed around the exhaust valve, the exhaust valve water jacket 29 may be disposed in communication with the exhaust valve intermediate water jacket 21, the exhaust valve intermediate water jacket 21 may be in communication with the first-layer water jacket 11 and the main body water jacket 10 respectively through the exhaust valve water jacket 29, and the refrigerant in the exhaust valve intermediate water jacket 21 may flow into the exhaust valve water jacket 29 to cool the exhaust valve of the engine, which may be configured to effectively cool the exhaust valve of the engine.

Further, the exhaust valve water jacket 29 may be provided with a first communication hole that may be provided in communication with the main body water jacket 10, and a part of the refrigerant in the exhaust valve water jacket 29 may flow into the main body water jacket 10 through the first communication hole to cool the lower side of the exhaust passage in the cylinder head 100. Also, the exhaust valve water jacket 29 may be provided with a second communication hole 32, the second communication hole 32 may be provided in communication with the first-stage water jacket 11, and another portion of the refrigerant in the exhaust valve water jacket 29 may flow into the first-stage water jacket 11 through the second communication hole 32 to cool the upper side of the exhaust passage in the cylinder head 100. Due to the arrangement, the refrigerant can flow into the first-layer water jacket 11 and the main water jacket 10 to cool the exhaust channel in the cylinder cover 100, so that the temperature of the exhaust channel in the cylinder cover 100 can be effectively reduced, the cylinder cover 100 can be prevented from generating hidden dangers such as thermal fatigue and cracks, and the service performance of the engine can be ensured.

In some embodiments of the present invention, as shown in FIG. 1, the diameter of the second communicating hole 32 may be a, and a may satisfy the relation 10mm ≧ a ≧ 6mm, i.e., the diameter of the second communicating hole 32 may be any number between 6mm and 10 mm. This arrangement ensures that the pressure loss of the coolant flow in the cooling jacket 200 is small, and the second communication holes 32 can serve as support points for the first-stage water jacket 11 during the manufacturing process of the sand core, thereby ensuring accurate positioning during the casting process.

In some embodiments of the present invention, as shown in fig. 1 and 4, the second layer water jacket 20 may further include: the water hole 33 on the exhaust side, the water hole 33 on the exhaust side can be set up with first through-hole intercommunication, optionally, the quantity of the water hole 33 on the exhaust side can be the same with the quantity of first through-hole to, the water hole 33 can set up with a plurality of first through-hole one-to-one on a plurality of exhaust sides. The refrigerant in the cylinder block of the engine may flow into the main water jacket 10 through the exhaust side upper water hole 33 and the first communication hole to cool the lower side of the exhaust passage in the cylinder head 100, and the refrigerant in the cylinder block of the engine may flow into the exhaust valve water jacket 29 through the exhaust side upper water hole 33 and then may flow into the first-stage water jacket 11 through the second communication hole 32 to cool the upper side of the exhaust passage in the cylinder head 100. This can more effectively reduce the thermal load on the cylinder head 100, and can further avoid the occurrence of thermal fatigue, cracks, and the like in the cylinder head 100.

As some embodiments of the present invention, as shown in fig. 6, a head gasket 40 may be disposed between the cylinder head 100 and the cylinder block, the head gasket 40 may be formed with a plurality of intake side avoidance holes 41 and a plurality of exhaust side avoidance holes 42, a part of the intake side avoidance holes 41 of the plurality of intake side avoidance holes 41 may be disposed to correspond to the plurality of main upper water holes 25, another part of the intake side avoidance holes 41 of the plurality of intake side avoidance holes 41 may be disposed to correspond to the plurality of auxiliary upper water holes 26, and the plurality of exhaust side avoidance holes 42 may be disposed to correspond to the plurality of exhaust side upper water holes 33. The coolant in the cylinder block of the engine may flow into the second-layer water jacket 20 through the plurality of intake-side relief holes 41 and the plurality of sets of intake-side upper water holes 24, and the coolant in the cylinder block of the engine may flow into the second-layer water jacket 20 and/or the main water jacket 10 through the plurality of exhaust-side relief holes 42 and the plurality of exhaust-side upper water holes 33.

Through the cooling water jacket 200, the temperature of the combustion chamber of the cylinder cover 100 can be reduced by 30 ℃, and the structural temperature of other parts can be reduced by 10-40 ℃, so that the thermal stress of the engine can be effectively reduced, and the thermal deformation of the engine can be avoided.

According to the engine of the embodiment of the utility model, the cooling water jacket 200 of the embodiment is included, through the cooling water jacket 200 of the utility model, the refrigerant in the second layer water jacket 20 can flow into the first layer water jacket 11 to cool the exhaust passage, and the refrigerant in the second layer water jacket 20 can also flow into the main body water jacket 10 to cool the exhaust passage, so that the heat load of the cylinder cover 100 can be effectively reduced, the local heat stress concentration of the cylinder cover 100 can be avoided, the hidden troubles of thermal fatigue, cracks and the like of the cylinder cover 100 can be avoided, and the service performance of the engine can be ensured.

According to the vehicle of the embodiment of the utility model, including the engine of the above embodiment, through the cooling water jacket 200 of the present application, the refrigerant in the second layer water jacket 20 can flow into the first layer water jacket 11 to cool the exhaust passage, and the refrigerant in the second layer water jacket 20 can also flow into the main body water jacket 10 to cool the exhaust passage, so that the heat load of the cylinder head 100 can be effectively reduced, the local thermal stress concentration of the cylinder head 100 can be avoided, the thermal fatigue, cracks and other hidden troubles of the cylinder head 100 can be avoided, and the service performance of the engine can be ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

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 device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 (10)

1. A cooling water jacket (200) of a cylinder head (100), characterized by comprising:

a body water jacket (10), the body water jacket (10) being located on a lower side of an exhaust manifold;

a first layer of water jacket (11), wherein the first layer of water jacket (11) is positioned on the upper side of the exhaust manifold;

the second-layer water jacket (20) comprises an exhaust valve intermediate water jacket (21), the exhaust valve intermediate water jacket (21) is located between two adjacent exhaust valves, the exhaust valve intermediate water jacket (21) is communicated with the first-layer water jacket (11) and the main body water jacket (10), and after the refrigerant in the second-layer water jacket (20) is split by the exhaust valve intermediate water jacket (21), one part of the refrigerant is suitable for flowing into the main body water jacket (10), and the other part of the refrigerant is suitable for flowing into the first-layer water jacket (11).

2. The cooling water jacket (200) of the cylinder head (100) according to claim 1, wherein the second-tier water jacket (20) further includes: a first intake valve water jacket (22) and a second intake valve water jacket (23), the first intake valve water jacket (22) and the second intake valve water jacket (23) each being disposed around an intake valve.

3. The cooling water jacket (200) of the cylinder head (100) according to claim 2, wherein the second-tier water jacket (20) further includes: the water hole (24) on the side of multiunit admit air, every group admit air side water hole (24) including main water hole (25) and assist water hole (26), main water hole (25) of going up with first intake valve water jacket (22) intercommunication, assist water hole (26) with second intake valve water jacket (23) intercommunication.

4. The cooling water jacket (200) of the cylinder head (100) according to claim 2, wherein the second-tier water jacket (20) further includes: the water-cooled fuel injector comprises an injector water jacket (27) and a spark plug water jacket (28), wherein the injector water jacket (27) is arranged around an injector and/or a pre-combustion chamber, the spark plug water jacket (28) is arranged around a spark plug, the first air inlet valve water jacket (22) is communicated with the injector water jacket (27), and the second air inlet valve water jacket (23) is communicated with the spark plug water jacket (28).

5. The cooling water jacket (200) of the cylinder head (100) according to claim 4, characterized in that the injector water jacket (27) communicates with the plug water jacket (28), and the injector water jacket (27) communicates with the exhaust valve intermediate water jacket (21).

6. The cooling water jacket (200) of the cylinder head (100) according to claim 1, wherein the second-tier water jacket (20) further includes: an exhaust valve water jacket (29), wherein the exhaust valve water jacket (29) is arranged around the exhaust valve, the exhaust valve water jacket (29) is communicated with the exhaust valve intermediate water jacket (21), and the exhaust valve intermediate water jacket (21) is communicated with the first layer water jacket (11) and the main body water jacket (10) through the exhaust valve water jacket (29);

the exhaust valve water jacket (29) is provided with a first communication hole and a second communication hole (32), the first communication hole is communicated with the main body water jacket (10), and the second communication hole (32) is communicated with the first layer water jacket (11).

7. The cooling water jacket (200) of the cylinder head (100) according to claim 6, wherein the diameter of the second communication hole (32) is a, satisfying the relation 10mm ≧ a ≧ 6 mm.

8. The cooling water jacket (200) of the cylinder head (100) according to claim 6, wherein the second-tier water jacket (20) further includes: an exhaust side upper water hole (33), the exhaust side upper water hole (33) communicating with the first communication hole.

9. An engine, characterized by comprising the cooling water jacket (200) of the cylinder head (100) according to any one of claims 1 to 8.

10. A vehicle characterized by comprising the engine according to claim 9.

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