Engine and vehicle

Abstract

The invention relates to an engine and a vehicle. The engine comprises a cylinder cover and a water cavity plug, the cylinder cover is provided with an air inlet channel, an exhaust channel, a water inlet, a water outlet and a water flowing cavity, the water inlet is close to the exhaust channel, the water outlet is close to the air inlet channel, and the water flowing cavity is arranged on the periphery of the air inlet channel and the exhaust channel and communicated with the water inlet. The water cavity plug is arranged on the air cylinder cover and extends into the water flowing cavity, and a first intercepting channel is formed in the side, close to the exhaust channel, of the water flowing cavity. According to the engine, the water cavity plug is arranged on the air cylinder cover, the water cavity can extend into the water flowing cavity to form the first intercepting channel on the side, close to the exhaust passage, of the water flowing cavity, the sectional area of the side, close to the exhaust passage, of the water flowing cavity is reduced, and therefore the flow speed of cooling liquid on the side, close to the exhaust passage, of the water flowing cavity can be increased; the heat transfer efficiency is improved, the temperature of cooling water can be rapidly increased, the engine can rapidly enter the optimal operation state, and emission at the initial stage of starting is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an engine and a vehicle. Background Art

[0002] The four-valve water-cooled engine adopts an asymmetric cooling water channel layout, with the water inlet on one side of the exhaust channel and the water outlet on the other side of the intake channel. When the engine is running, the water will flow orderly around the spark plugs and the intake / exhaust channels. This design can effectively remove the heat generated by the cylinder head, ensuring that the engine will not be affected by overheating during operation. Performance and stability. However, after the engine is started, the water temperature rises slowly, and the engine takes a long time to enter the optimal operating state. During this period, engine combustion is not conducive to emissions. Summary of the invention

[0003] Based on this, it is necessary to provide an engine and a vehicle to address the above technical problems.

[0004] An engine, comprising:

[0005] A cylinder head, comprising an air inlet, an exhaust passage, a water inlet, a water outlet and a water cavity, wherein the water inlet is close to the exhaust passage, the water outlet is close to the air inlet, the water cavity is arranged at the periphery of the air inlet and the exhaust passage, and the water cavity is communicated with the water inlet and the water inlet; and

[0006] A water cavity plug is arranged on the cylinder head, the water cavity plug extends into the water cavity and forms a first intercepting channel on one side of the water cavity close to the exhaust passage.

[0007] The above-mentioned engine, by arranging a water chamber plug on the cylinder head, can extend the water chamber into the water chamber to form a first intercepting channel on the side of the water chamber close to the exhaust passage, so that the cross-sectional area of ​​the side of the water chamber close to the exhaust passage is reduced. In this way, the flow rate of the coolant on the side of the water chamber close to the exhaust passage can be increased, so that the heat transfer efficiency is improved, the cooling water temperature can be quickly increased, the engine can quickly enter the optimal operating state, and the emissions in the initial stage of startup are improved.

[0008] In one embodiment, a first gap is provided between the water cavity plug and the side wall surface of the water cavity close to the exhaust passage, and a second gap is provided between the water cavity plug and the bottom wall surface of the water cavity, and the first gap and the second gap cooperate to form the first intercepting channel; wherein the water cavity plug extends toward the bottom wall surface of the water cavity.

[0009] In one embodiment, the side wall surface of the water cavity close to the exhaust passage includes a first intercepting portion and a first recessed portion, the first intercepting portion cooperates with the water cavity plug to form a part of the first intercepting channel, and the first recessed portion is adjacent to the first intercepting portion.

[0010] In one embodiment, a first smooth transition zone is provided between the first recessed portion and the first intercepting portion.

[0011] In one embodiment, the engine further comprises a spark plug, wherein the spark plug is disposed on the cylinder head and located between the intake passage and the exhaust passage;

[0012] The water cavity is also arranged on the outer periphery of the spark plug, and the water cavity plug is also formed with a second intercepting channel on one side of the water cavity close to the spark plug.

[0013] In one embodiment, a third gap is provided between the water chamber plug and the side wall surface close to the spark plug, a fourth gap is provided between the water chamber plug and the bottom wall surface of the water chamber, and the third gap and the fourth gap cooperate to form the second intercepting channel; wherein the water chamber plug extends toward the bottom wall surface of the water chamber.

[0014] In one embodiment, the side wall surface of the water cavity close to the spark plug includes a second cut-off portion and a second recessed portion, the second cut-off portion cooperates with the water cavity plug to form a part of the second cut-off channel, and the second recessed portion is adjacent to the second cut-off portion.

[0015] In one embodiment, a second smooth transition zone is provided between the first and second cut-off portions.

[0016] In one embodiment, the number of each of the intake passage and the exhaust passage is two, and the intake passage and the exhaust passage are arranged on different sides of the cylinder head.

[0017] A vehicle comprises the engine as described in any one of the above items.

[0018] The above-mentioned vehicle, by arranging a water chamber plug on the cylinder head of the engine, can extend the water chamber into the water chamber to form a first intercepting channel on the side of the water chamber close to the exhaust passage, so that the cross-sectional area of ​​the side of the water chamber close to the exhaust passage is reduced. In this way, the flow rate of the coolant on the side of the water chamber close to the exhaust passage can be increased, so that the heat transfer efficiency is improved, the cooling water temperature can be quickly increased, the engine can quickly enter the optimal operating state, and the emissions in the initial stage of startup are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the flow of coolant in the cylinder head of an engine provided by an embodiment of the present application. Figure 1 The dashed arrows in the figure represent the flow direction of the coolant.

[0020] Figure 2 for Figure 1Schematic diagram of the local section at AA.

[0021] Figure 3 for Figure 1 A partial enlarged schematic diagram of .

[0022] Figure 4 for Figure 1 Schematic diagram of the local section at BB.

[0023] The description of the numbers of the accompanying drawings is as follows:

[0024] 110, air inlet; 120, exhaust duct; 130, water inlet; 140, water outlet; 150, water cavity; 151, first intercepting channel; 151a, first gap; 151b, second gap; 152, second intercepting channel; 152a, third gap; 152b, fourth gap; 153, first intercepting portion; 154, first recessed portion; 155, first smooth transition zone; 200, water cavity plug; 210, screw portion; 220, mounting portion; 300, spark plug. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0031] In the automotive field, especially in high-performance cars and SUVs (Sports Utility Vehicles), four-valve water-cooled engines are very common. When a car is driving, the engine runs at high load for a long time, which will generate a lot of heat. The powerful heat dissipation capacity of the four-valve water-cooled engine can ensure that the engine can work stably under various road conditions and provide the vehicle with continuous and strong power output. In addition, it can also be seen on some medium and large motorcycles. The speed of a motorcycle changes frequently when riding, and the response speed and heat dissipation performance of the engine are strictly required. The four-valve water-cooled engine can meet these needs and ensure the smooth and safe riding.

[0032] The four-valve water-cooled engine includes components such as the cylinder block, cylinder head, cooling system and spark plugs. The cylinder block is the basic component of the engine, and is equipped with cylinder holes for piston movement; the cylinder head is installed above the cylinder block and cooperates with the cylinder block to form a combustion chamber. The cylinder head is equipped with an intake duct and an exhaust duct, which are respectively connected to the two intake valves and two exhaust valves of the combustion chamber to achieve efficient gas exchange. The cooling system introduces coolant into the water channels inside the cylinder block and cylinder head through the water inlet, and discharges it from the water outlet after absorbing heat to ensure stable engine temperature. The spark plug is installed on the cylinder head, and its ignition end extends into the combustion chamber to ignite the mixture, thereby achieving combustion and work. The spark plug is surrounded by the intake and exhaust valves to ensure the coordination of ignition and valve movement, thereby improving engine performance.

[0033] When the engine is running, the water will flow in an orderly manner around the spark plugs and the intake / exhaust passages. This design can efficiently remove the heat generated by the cylinder head, ensuring that the engine will not be affected by overheating during operation and affecting performance and stability. However, after the engine is started, it takes a long time for the coolant to absorb enough heat after entering from the water inlet and circulate to the radiator through the water outlet. At the same time, the engine has low combustion efficiency at low temperatures, and the mixture is not fully burned, resulting in less heat generation. Therefore, it takes a long time for the engine to enter the optimal operating state, and the incomplete combustion during this period will have an adverse effect on emissions and increase the emission of harmful gases.

[0034] In this regard, an embodiment of the present application provides an engine, which can be a four-valve water-cooled engine, which can be applied to vehicles such as high-performance sedans, SUVs or motorcycles to provide a guarantee for the stable operation of the vehicle. Of course, the engine can also be a two-valve engine.

[0035] like Figure 1 As shown, the engine housing includes a cylinder block, a cylinder head, a cooling system, a spark plug 300 and a water cavity plug 200. The cylinder block is a basic component of the engine, and a cylinder hole for piston movement is provided inside the cylinder block.

[0036] The cylinder head is installed above the cylinder block and cooperates with the cylinder block to form a combustion chamber. Figure 1 As shown, the cylinder head has an intake passage 110, an exhaust passage 120, a water inlet 130, a water outlet 140 and a water cavity 150. The intake passage 110 and the exhaust passage 120 are respectively connected to the intake valve and the exhaust valve of the combustion chamber. The water inlet 130 is close to the exhaust passage 120, and the water outlet 140 is close to the intake passage 110. The water cavity 150 is arranged at the periphery of the intake passage 110 and the exhaust passage 120, and the water cavity 150 is connected to the water inlet 130 and the water inlet 130. It should be noted here that when the engine is running, the temperature of the exhaust passage 120 is the highest, the temperature of the intake passage 110 is the lowest, and the temperature of the spark plug 300 intervenes between the exhaust passage 120 and the intake passage 110.

[0037] The number of the intake passages 110 and the exhaust passages 120 may be set accordingly according to the number of the intake valves and the exhaust valves of the combustion chamber. Figure 1 As shown, when the engine is a four-valve water-cooled engine, the combustion chamber has two intake valves and two exhaust valves, and the intake passage 110 and the exhaust passage 120 are also provided in two, each intake passage 110 is connected to a corresponding intake valve, and each exhaust passage 120 is connected to a corresponding exhaust valve, wherein the two intake passages 110 are provided on a side of the cylinder head close to the water outlet 140, and the two intake passages 110 are provided on a side of the cylinder head close to the water inlet 130, that is, the intake passage 110 and the exhaust passage 120 are provided on different sides of the cylinder head. Again, for example, when the engine is a two-valve engine, the combustion chamber has one intake valve and one exhaust valve, and the intake passage 110 and the exhaust passage 120 are also provided in one, and the intake passage 110 is connected to the intake valve, and the exhaust passage 120 is connected to the exhaust valve.

[0038] The number of water inlet 130 and water outlet 140 can be 1 or 2 respectively, and the specific number can depend on the cooling requirements and design layout of the engine. Among them, the single-inlet and single-outlet design is simple and practical, while the double-inlet and double-outlet design is more suitable for high-performance engines to ensure efficient cooling effect. Of course, it can also be as follows Figure 1 As shown, it is designed as double inlet and single outlet, that is, two water inlets 130 and one water outlet 140 are provided.

[0039] The water chamber 150 needs to be arranged closely around the high temperature areas such as the combustion chamber, intake valve, exhaust valve and spark plug 300 to ensure that these areas are fully cooled; it is also necessary to ensure the structural strength of the cylinder head, especially under high load conditions, the cylinder head needs to withstand the impact of combustion pressure and valve mechanism. Figure 1 The annular form shown may also be arranged in a longitudinal or transverse cross form.

[0040] The cooling system introduces coolant into the water channels inside the cylinder block and the cylinder head through the water inlet 130, and discharges the coolant from the water outlet 140 after absorbing heat, thereby ensuring a stable engine temperature.

[0041] The spark plug 300 is mounted on the cylinder head and is located between the intake passage 110 and the exhaust passage 120. The water chamber 150 is also arranged on the periphery of the spark plug 300. The ignition end of the spark plug 300 extends into the combustion chamber to ignite the mixture, thereby achieving combustion work. The spark plug 300 is surrounded by the intake and exhaust valves to ensure the coordination of ignition and valve movement, thereby improving engine performance.

[0042] like Figure 1 As shown, the water cavity plug 200 is arranged on the cylinder head, the water cavity plug 200 extends into the water cavity 150 and forms a first intercepting channel 151 on the side of the water cavity 150 close to the exhaust passage 120. Among them, the cylinder head is provided with a water cavity plug mounting hole on the side of the water cavity 150 close to the exhaust passage 120, the water cavity plug 200 can be installed in the water cavity plug mounting hole and extend into the water cavity 150 from the water cavity plug mounting hole. The water cavity plug mounting hole can be a threaded hole, and the water cavity plug 200 can be screwed to the water cavity plug mounting hole to facilitate the disassembly and assembly of the water cavity plug 200. Of course, the water cavity plug 200 can also be installed in the water cavity plug mounting hole by welding, bonding, clamping, integral molding, etc. Regarding the structure of the water cavity plug 200, it can be as shown Figure 2 As shown, the water cavity plug 200 includes a connected mounting portion 220 and a screw portion 210, the screw portion 210 is screwed to the water cavity plug mounting hole, and the mounting portion 220 facilitates the screwing of the water cavity plug 200. The present application does not limit the structure of the water cavity plug 200.

[0043] like Figure 2 As shown, the water cavity plug 200 extends into the water cavity 150, and can occupy a part of the water cavity 150, so that the cross-sectional area of ​​the water cavity 150 close to the exhaust passage 120 is reduced. According to the fluid continuity equation, if the flow rate of the fluid remains unchanged, when the cross-sectional area decreases, the flow rate will inevitably increase. The specific relationship is as follows: 2 =(A 1 ×ν 1 ) / A 2 , where A 1 , A 2 is the cross-sectional area, ν 1 , ν 2is the flow rate. It can be seen from the formula that if the cross-sectional area becomes smaller, the flow rate increases. When the flow rate of the coolant (such as cooling water) increases, the relative movement between the coolant and the wall of the water cavity 150 on the side close to the exhaust duct 120 intensifies, which will cause more heat to be transferred from the high-temperature surface to the coolant through convection heat transfer. The high-speed flowing coolant can take away the heat faster, thereby improving the heat transfer efficiency, and can quickly increase the cooling water temperature, so that the engine can quickly enter the optimal operating state and improve the emissions at the initial start-up; moreover, the high flow rate can easily change the coolant from a laminar state to a turbulent state. In the turbulent state, the mixing inside the coolant is more intense, and the heat distribution is more uniform, thereby significantly improving the heat transfer efficiency. The disturbance of turbulence can break the thermal boundary layer and further enhance the heat transfer.

[0044] Therefore, the engine provided by the present application, by arranging a water chamber plug 200 on the cylinder head, can extend the water chamber plug 200 into the water chamber 150 to form a first intercepting channel 151 on the side of the water chamber 150 close to the exhaust passage 120, so that the cross-sectional area of ​​the water chamber 150 on the side close to the exhaust passage 120 is reduced, thereby increasing the flow rate of the coolant on the side of the water chamber 150 close to the exhaust passage 120, thereby improving the heat transfer efficiency, quickly increasing the cooling water temperature, allowing the engine to quickly enter the optimal operating state, and improving emissions in the initial stage of startup.

[0045] In some embodiments of the present application, Figure 2 As shown, there is a first gap 151a between the water cavity plug 200 and the side wall of the water cavity 150 close to the exhaust passage 120, and a second gap 151b between the water cavity plug 200 and the bottom wall of the water cavity 150. The first gap 151a and the second gap 151b cooperate to form a first intercepting channel 151; wherein the water cavity plug 200 extends toward the bottom wall of the water cavity 150, for example, the bottom wall of the water cavity 150 is perpendicular to the central axis of the water cavity plug 200. By such an arrangement, as Figure 2 As shown, not only the width W of the water passage 150 on the side close to the exhaust passage 120 is 1 And length L 1 The cross-sectional area of ​​the water cavity 150 on the side close to the exhaust passage 120 can be effectively reduced, and a gap is left between the water cavity plug 200 and the side wall surface of the water cavity 150 close to the exhaust passage 120 and between the water cavity plug 200 and the bottom wall surface of the water cavity 150, thereby reducing the dead zone or the area with poor flow in the water cavity 150 to avoid local overheating, and also reducing the flow resistance of the coolant in the water cavity 150 to ensure that the coolant can flow smoothly and improve the cooling efficiency.

[0046] The sizes of the first gap 151a and the second gap 151b can be set accordingly according to requirements, and this application does not impose any specific restrictions on this.

[0047] In some embodiments of the present application, Figure 2 As shown, the surface of the water cavity plug 200 facing the bottom wall of the water cavity 150 is a plane. Compared with other structures, for example, the surface of the water cavity plug 200 facing the bottom wall of the water cavity 150 is set to a triangular structure protruding outward, the plane structure of the present application facilitates the production and processing of the water cavity plug 200 and the water cavity 150, and can also reduce the flow resistance of cooling, ensure that the coolant can flow smoothly, and improve the cooling efficiency.

[0048] In some embodiments of the present application, Figure 3 As shown, the side wall surface of the water cavity 150 near the exhaust passage 120 includes a first intercepting portion 153 and a first recessed portion 154. The first intercepting portion 153 cooperates with the water cavity plug 200 to form a part of the first intercepting passage 151, and the first recessed portion 154 is adjacent to the first intercepting portion 153. The first recessed portion 154 can increase the side wall surface area of ​​the water cavity 150 near the exhaust passage 120, increase the heat transfer area between the water cavity 150 and the exhaust passage 120, further increase the heat transfer amount, quickly increase the cooling water temperature, enable the engine to quickly enter the optimal operating state, and improve the emission at the initial start-up.

[0049] The number of the first intercepting portions 153 and the first recessed portions 154 can be set accordingly according to the number of the exhaust passages 120. Figure 1 and Figure 3 As shown, when there are two exhaust passages 120, two first intercepting portions 153 and two first recessed portions 154 are provided, and each exhaust passage 120 corresponds to one first intercepting portion 153 and one first recessed portion 154. Again, by way of example, when there is only one exhaust passage 120, one first intercepting portion 153 and one first recessed portion 154 are provided.

[0050] like Figure 3 As shown, there is a first smooth transition zone 155 between the first recessed portion 154 and the first intercepting portion 153. The setting of the first smooth transition zone 155 can reduce the flow resistance of the coolant in the water cavity 150, ensure that the coolant can flow smoothly, and improve the cooling efficiency. Among them, the wall surfaces of the first recessed portion 154 and the first intercepting portion 153 are both set to streamline structures, for example, the first recessed portion 154 is set to a semicircular shape, and the first intercepting portion 153 is set to an arc shape. Such a setting can also further reduce the flow resistance of the coolant in the water cavity 150, ensure that the coolant can flow smoothly, and improve the cooling efficiency.

[0051] As engine emissions continue to become more stringent, engines usually use methods such as increasing compression ratio, lean combustion or increasing exhaust gas recirculation (EGR) to make combustion cleaner, but these methods will increase the temperature of the combustion chamber, causing the temperature of the cylinder head (especially around the spark plug 300) to rise, causing local overheating of the cylinder head, and abnormal combustion such as knocking will occur under high load operation, damaging the engine. In this regard, Figure 4 As shown, in some embodiments of the present application, the water cavity plug 200 also forms a second intercepting channel 152 on one side of the water cavity 150 close to the spark plug 300. Figure 4 As shown, the water chamber plug 200 extends into the water chamber 150 and may occupy a portion of the water chamber 150, thereby reducing the cross-sectional area of ​​the side of the water chamber 150 close to the spark plug 300, increasing the coolant flow rate, improving the heat transfer efficiency, and reducing the temperature at the spark plug 300, thereby avoiding abnormal combustion such as detonation.

[0052] like Figure 4 As shown, in some embodiments, there is a third gap 152a between the water cavity plug 200 and the side wall surface close to the spark plug 300, and there is a fourth gap 152b between the water cavity plug 200 and the bottom wall surface of the water cavity 150. The third gap 152a and the fourth gap 152b cooperate to form the second intercepting channel 152. By such a configuration, not only the width W of the side of the water cavity 150 close to the spark plug 300 is 2 And length L 2 The cross-sectional area of ​​the water cavity 150 on the side close to the spark plug 300 can be effectively reduced, and a gap is left between the water cavity plug 200 and the side wall surface of the water cavity 150 close to the spark plug 300 and between the water cavity plug 200 and the bottom wall surface of the water cavity 150, thereby reducing the dead zone or the area with poor flow in the water cavity 150 to avoid local overheating, and also reducing the flow resistance of the coolant in the water cavity 150 to ensure that the coolant can flow smoothly and improve the cooling efficiency.

[0053] The sizes of the third gap 152a and the fourth gap 152b can be set accordingly according to the requirements, and this application does not impose any specific restrictions on this.

[0054] In some embodiments of the present application, the side wall surface of the water cavity 150 near the spark plug 300 includes a second intercepting portion and a second recessed portion, the second intercepting portion and the spark plug 300 cooperate to form a part of the second intercepting channel 152, and the second recessed portion is adjacent to the second intercepting portion. The second recessed portion can increase the side wall surface area of ​​the water cavity 150 near the spark plug 300, increase the heat transfer area between the water cavity 150 and the spark plug 300, further increase the heat transfer amount, effectively reduce the temperature at the spark plug 300, and avoid abnormal combustion such as detonation.

[0055] The number of the second intercepting portions and the second recessed portions can be set accordingly according to the circumstances, and this application does not impose any specific restrictions on this.

[0056] There is a second smooth transition zone between the second recessed portion and the second intercepting portion. The setting of the second smooth transition zone can reduce the flow resistance of the coolant in the water cavity 150, ensure that the coolant can flow smoothly, and improve the cooling efficiency. Among them, the wall surfaces of the second recessed portion and the second intercepting portion are both set to streamlined structures. For example, the second recessed portion is set to a semicircular shape, and the second intercepting portion is set to a circular arc shape. Such a setting can also further reduce the flow resistance of the coolant in the water cavity 150, ensure that the coolant can flow smoothly, and improve the cooling efficiency.

[0057] On the other hand, an embodiment of the present application further provides a vehicle, the vehicle comprising any of the above-mentioned engines. The vehicle may be a high-performance sedan, SUV, motorcycle, or other vehicles.

[0058] The vehicle provided in the present application is provided with a water chamber plug 200 on the cylinder head of the engine, and the water chamber plug 200 can be extended into the water chamber 150 to form a first intercepting channel 151 on the side of the water chamber 150 close to the exhaust passage 120, so that the cross-sectional area of ​​the water chamber 150 on the side close to the exhaust passage 120 is reduced, thereby increasing the flow rate of the coolant on the side of the water chamber 150 close to the exhaust passage 120, thereby improving the heat transfer efficiency, quickly increasing the cooling water temperature, allowing the engine to quickly enter the optimal operating state, and improving emissions in the initial stage of startup.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An engine, characterized in that: include: A cylinder head, comprising an air inlet, an exhaust passage, a water inlet, a water outlet and a water cavity, wherein the water inlet is close to the exhaust passage, the water outlet is close to the air inlet, the water cavity is arranged at the periphery of the air inlet and the exhaust passage, and the water cavity is communicated with the water inlet and the water inlet; and A water cavity plug is arranged on the cylinder head, the water cavity plug extends into the water cavity and forms a first intercepting channel on one side of the water cavity close to the exhaust passage.

2. The engine according to claim 1, characterized in that A first gap is defined between the water cavity plug and the side wall of the water cavity close to the exhaust passage, and a second gap is defined between the water cavity plug and the bottom wall of the water cavity. The first gap and the second gap cooperate to form the first intercepting channel; wherein the water cavity plug extends toward the bottom wall of the water cavity.

3. The engine according to claim 1, characterized in that The side wall surface of the water cavity close to the exhaust passage includes a first intercepting portion and a first recessed portion. The first intercepting portion cooperates with the water cavity plug to form a part of the first intercepting channel. The first recessed portion is adjacent to the first intercepting portion.

4. The engine according to claim 3, characterized in that A first smooth transition zone is defined between the first recessed portion and the first intercepting portion.

5. The engine according to any one of claims 1 to 4, characterized in that: The engine further comprises a spark plug, which is arranged on the cylinder head and located between the intake passage and the exhaust passage; The water cavity is also arranged on the outer periphery of the spark plug, and the water cavity plug is also formed with a second intercepting channel on one side of the water cavity close to the spark plug.

6. The engine according to claim 5, characterized in that A third gap is provided between the water chamber plug and the side wall surface close to the spark plug, a fourth gap is provided between the water chamber plug and the bottom wall surface of the water chamber, and the third gap and the fourth gap cooperate to form the second intercepting channel; wherein the water chamber plug extends toward the bottom wall surface of the water chamber.

7. The engine according to claim 5, characterized in that The side wall surface of the water cavity close to the spark plug includes a second intercepting portion and a second recessed portion. The second intercepting portion cooperates with the water cavity plug to form a part of the second intercepting channel. The second recessed portion is adjacent to the second intercepting portion.

8. The engine according to claim 7, characterized in that A second smooth transition zone is provided between the first and second intercepting portions.

9. The engine according to any one of claims 1 to 4, characterized in that: The intake passage and the exhaust passage are both provided in two numbers, and the intake passage and the exhaust passage are arranged on different sides of the cylinder head.

10. A vehicle, characterized in that: Comprising an engine as claimed in any one of claims 1 to 9.

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