CN116006346A - Combustion chamber structure and engine - Google Patents

Abstract

The present application relates to a combustion chamber structure and an engine, including a combustion chamber body and at least two spoilers. The combustion inner wall body has an accommodating cavity and an opening communicating with the accommodating cavity, the opening is used for intake swirl to flow into the accommodating cavity, wherein the spoiler is configured to change the flow velocity and flow direction of the intake swirl. By setting the spoiler structure in the combustion chamber structure, the flow velocity and flow direction of the intake vortex entering the combustion chamber structure are changed, thereby changing the size and intensity of the intake vortex, making the gas mixing more uniform and speeding up the flame propagation rate, improving combustion efficiency.

Description

Combustion chamber structure and engine

technical field

The invention relates to the technical field of engines, in particular to a combustion chamber structure and an engine.

Background technique

Natural gas engines are combusted in the form of gas and air mixture, and the mixed gas injected into the combustion chamber structure tends to form a large vortex. In related technologies, the combustion chamber structure of the engine is in the shape of a shallow basin, which makes the vortex flow in the combustion chamber structure The strength is further improved, which is not conducive to the combustion of gas.

Contents of the invention

Based on this, it is necessary to solve the problem that the large size of the vortex in the combustion chamber structure is not conducive to the combustion of the mixed gas, and provide a method that can change the size and intensity of the intake vortex by changing the flow velocity and flow direction of the intake vortex entering the combustion chamber structure. combustion chamber structure.

One aspect of the present invention provides a combustion chamber structure, comprising:

The body of the combustion chamber has a receiving chamber and an opening communicating with the receiving chamber; the opening is used for intake swirl to flow into the receiving chamber; and

At least two spoilers, all the spoilers are arranged on the side wall of the accommodating cavity at intervals;

Wherein, the spoiler is configured to be able to change the flow velocity and flow direction of the intake vortex.

In one embodiment, the spoiler has a first curved surface and a second curved surface opposite to each other, and the first curved surface and the second curved surface are respectively smoothly connected with the side walls of the accommodating cavity.

In one embodiment, the curvatures of the first curved surface and the second curved surface gradually change.

In one embodiment, all spoilers are uniformly distributed along the circumference of the side wall of the accommodating chamber.

In one of the embodiments, the spoiler also has a third curved surface;

The third curved surface is smoothly connected between the first curved surface and the second curved surface.

In one of the embodiments, the tangent plane defining the vertices of the second curved surface is the first plane;

There is an included angle between the first plane and the plane where the opening is located.

In one embodiment, the included angle is 30°-50°.

In one of the embodiments, the accommodating chamber further has a flow guide part; the flow guide part is formed by the bottom wall of the accommodating chamber protruding toward the opening direction.

In one of the embodiments, the flow guiding part is configured as a center-symmetric structure.

In another aspect of the present application, an engine is provided, including the above combustion chamber structure.

The combustion chamber structure and engine provided by the present application change the flow velocity and flow direction of the intake vortex entering the combustion chamber structure by setting a spoiler structure in the combustion chamber structure, thereby changing the size and shape of the intake vortex The strength makes the gas mix more uniform, speeds up the flame propagation rate, and improves the combustion efficiency.

Description of drawings

Fig. 1 is the schematic diagram of the position of the combustion chamber structure of an embodiment of the present application;

Fig. 2 is the structural representation of the combustion chamber structure of an embodiment of the present application;

Fig. 3 is the cross-sectional structure diagram of the combustion chamber structure of an embodiment of the present application;

Fig. 4 is a schematic cross-sectional structure diagram of a spoiler according to an embodiment of the present application;

Fig. 5 is a schematic diagram of the formation of the first local vortex on the spoiler according to an embodiment of the present application;

FIG. 6 is a schematic diagram of tumble flow formation in a combustion chamber structure according to an embodiment of the present application.

Explanation of reference signs:

100. Combustion chamber structure; 110. Combustion chamber body; 120. Spoiler; 121. First curved surface; 122. Second curved surface; 123. Third curved surface; 150, support portion; 200, air intake channel; 300, air intake vortex; 310, first partial vortex; 320, second partial vortex; 330, tumble flow.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on 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. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. 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. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

In order to facilitate the understanding of the technical solution of the present application, before the detailed description, the structure of the combustion chamber in the related art is firstly explained.

The combustion chamber structure is an important part of the engine. The design of the combustion chamber structure directly affects the engine's charge coefficient, flame propagation rate, heat release rate, heat transfer loss, and deflagration tendency, etc., thereby affecting engine performance. How to promote full and rapid combustion of fuel in the combustion chamber structure is of great significance for reducing emissions and improving combustion efficiency. The mixture of natural gas and air enters the combustion chamber structure and is ignited by the spark plug. This mixture of natural gas and air requires a high concentration to achieve ignition. Once the mixture is uneven, it is easy to cause misfire. As the piston moves upward, the vortex is squeezed The pressure enters the combustion chamber structure, and the shallow basin-shaped structure of the combustion chamber makes the vortex intensity continuously increase. In the process, the vortex will not be broken into small-scale vortex movements. However, for a natural gas engine, small-scale eddies play a crucial role in flame propagation, and therefore, the combustion chamber structure in the related art is not conducive to the combustion of gaseous fuel. At the same time, the combustion flame propagation speed of natural gas is low, which makes the engine knock prone, and it is impossible to use high compression ratio pistons to further improve thermal efficiency.

When the engine is working, the engine piston is connected to the crankshaft and connecting rod. Driven by the crankshaft and connecting rod, the engine piston moves to form four strokes, which are suction stroke, compression stroke, power stroke and exhaust stroke. During the suction stroke, the intake passage in the engine opens, the exhaust passage closes, the engine piston moves downward, and the mixture of gas and air enters the combustion chamber structure in the piston. Wherein, the piston is the combustion chamber structure in the present application. The combustion chamber structure involved in this application is mainly aimed at improving the situation that the mixture of gas and air in the intake stroke of the engine is not uniformly mixed, and the size of the intake vortex is too large, resulting in insufficient subsequent combustion.

Therefore, in view of the fact that the structure of the combustion chamber structure in the related art is not conducive to the uniform mixing and sufficient combustion of the gas fuel, a simple structure of the combustion chamber structure that enables the gas fuel to be mixed more uniformly and burned more fully is provided.

Further, the above-mentioned Venturi effect means that when the restricted flow passes through the reduced flow section, the flow velocity of the fluid increases, and the flow velocity is inversely proportional to the flow section. According to Bernoulli's law, the increase of flow rate is accompanied by the decrease of fluid pressure, which is the common Venturi phenomenon. In simple terms, when the airflow blows through the barrier, the air pressure near the port above the leeward side of the barrier is relatively low, which creates adsorption and causes the flow of air. In layman's terms, this effect means that a low pressure will be generated near a fluid flowing at a high speed, resulting in adsorption.

In this application, the first curved surface 121 is defined as the windward surface of the intake vortex 300 , and the second curved surface 122 is defined as the leeward surface of the intake vortex 300 .

In addition, the drawings are not drawn in a 1:1 scale, and the relative sizes of the elements are drawn in the drawings by way of example only and not necessarily in true scale.

For ease of description, the drawings only show structures related to the embodiments of the present invention.

FIG. 1 shows a schematic diagram of the position of a combustion chamber structure 100 according to an embodiment of the present application, and FIG. 2 shows a schematic structural diagram of the combustion chamber structure 100 according to an embodiment of the present application.

Referring to FIG. 1 and FIG. 2 , an embodiment of the present application provides a combustion chamber structure 100 , including a combustion chamber body 110 and at least two spoilers 120 . The combustion chamber body 110 has an accommodating cavity 130 and an opening communicating with the accommodating cavity 130 for the intake vortex 300 to flow into the accommodating cavity 130 , wherein the spoiler 120 is configured to change the flow velocity and flow direction of the intake vortex 300 .

In the combustion chamber structure 100 provided by the present application, by setting the spoiler 120 in the combustion chamber structure 100, the flow velocity and flow direction of the intake vortex 300 entering the combustion chamber structure 100 are changed, thereby changing the intake vortex 300 The size and strength of the gas make the gas mixture more uniform, speed up the flame propagation rate and improve the combustion efficiency.

Fig. 3 shows a cross-sectional view of a combustion chamber structure 100 according to an embodiment of the present application, Fig. 4 shows a schematic cross-sectional structure diagram of a spoiler 120 according to an embodiment of the present application, and Fig. 5 shows a cross-sectional view of a spoiler 120 according to an embodiment of the present application A schematic diagram of the formation of the first partial vortex 310 on the top.

As shown in FIG. 4 , in some embodiments, the spoiler 120 has a first curved surface 121 and a second curved surface 122 opposite to each other, and the first curved surface 121 and the second curved surface 122 are smoothly connected with the sidewall of the receiving cavity 130 respectively. In the embodiment shown in Fig. 1, the engine includes an intake channel 200, which itself has a helical tubular structure, and the gas-air mixture circulates in the intake channel 200 to form an intake vortex 300 and enters the combustion chamber. Chamber structure 100. Since the first curved surface 121 is smoothly connected with the side wall of the housing cavity 130, the intake swirl 300 can maintain the same movement trend when entering the combustion chamber structure 100, passing through the first curved surface 121 more smoothly and completely, and subsequently More first local vortices 310 can also be generated in the Venturi effect of .

From the Venturi effect, it is known that the first partial vortex 310 will be generated on the second curved surface 122. Since the second curved surface 122 is smoothly connected with the side wall of the housing chamber 130, the generated first partial vortex 310 can maintain the same motion state and be more stable. The complete structure improves the quality of the generated first partial vortex 310 and is more conducive to the combustion efficiency in the combustion chamber structure 100 .

In some embodiments, the curvatures of the first curved surface 121 and the second curved surface 122 gradually change. As shown in FIG. 5 , the curvatures of the first curved surface 121 and the second curved surface 122 become larger from the bottom wall of the receiving chamber 130 to the top of the spoiler 120 . On the one hand, when the curvature of the end of the first curved surface 121 close to the bottom wall of the accommodation cavity 130 is small, the end of the accommodation cavity 130 close to the bottom wall is connected to the bottom wall as smoothly as possible, so that the intake vortex 300 flows through the first curved surface 121 At the same time, the intake vortex 300 will not be subject to greater resistance because the end of the first curved surface 121 near the bottom wall is too steep, thereby affecting the quality of the subsequent formation of the first partial vortex 310 . On the other hand, it can be seen from the Venturi effect that when the intake vortex 300 reaches the highest point of the first curved surface 121 , the flow area becomes smaller and the flow velocity of the airflow increases, thereby generating adsorption on the second curved surface 122 . The purpose of setting the curvature of the highest point of the first curved surface 121 to the maximum is to prevent the slope of the curved surface from being too gentle when the intake vortex 300 reaches the highest point of the first curved surface 121, so that the flow area is not significantly reduced, thereby affecting the subsequent Venturi effect. Occurrence, and then affect the quality of the first local vortex 310 generated.

The curvature of the second curved surface 122 becomes larger and larger from the bottom wall of the housing cavity 130 to the top of the spoiler 120. On the one hand, it is to prevent the intake vortex 300 from reaching the highest point of the first curved surface 121 and the second curved surface 122. The slope is too gentle so that the flow area does not decrease significantly, thus affecting the occurrence of the subsequent Venturi effect. On the other hand, when the first partial vortex 310 is generated on the second curved surface 122, the curvature of the end of the second curved surface 122 close to the bottom wall of the accommodating cavity 130 is small, which can make the end of the second curved surface 122 close to the bottom wall of the accommodating cavity 130 It is smoothly connected with the bottom wall of the accommodating cavity 130 to ensure that the first partial vortex 310 maintains the same movement tendency as much as possible, which is beneficial to improve the gas mixing and sufficient combustion in the combustion chamber structure 100 .

In some embodiments, all spoilers 120 are evenly distributed along the circumferential direction of the sidewall of the accommodating cavity 130 . As shown in FIG. 2, the spoiler 120 in the combustion chamber structure 100, on the one hand, destroys the size and strength of the intake vortex 300 by changing the flow direction and flow velocity of the intake vortex 300, and on the other hand, by forming the first The local vortex 310 makes the gas and air in the combustion chamber structure 100 mix more evenly. Distributing all spoilers 120 evenly along the circumference of the side wall of the housing cavity 130 can make the first local vortex 310 generated in all directions on the side wall of the combustion chamber structure 100 and generate the first local vortex 310 in the entire combustion chamber structure 100 The first partial vortex 310 has symmetry, so that the mixed gas can be mixed more uniformly.

It should be noted that there are at least two spoilers 120, but if the number of spoilers 120 is too large, the arrangement of the spoilers 120 on the side wall of the accommodating cavity 130 will be crowded, and the first partial vortex cannot be provided. The formation of 310 and the second partial vortex 320 leaves enough space, which is not conducive to the full combustion of the mixed gas in the combustion chamber structure 100 . Based on this, the number of spoilers 120 includes but not limited to 2, 3, 4, 5, 6 or 8. In the embodiment shown in FIG. 2, the number of spoilers 120 is set to 4, The four spoilers 120 are evenly distributed on the side wall of the receiving cavity 130 , and the four spoilers 120 are symmetrical in pairs.

As shown in FIG. 4 , in some embodiments, the spoiler 120 further has a third curved surface 123 , and the third curved surface 123 is smoothly connected between the first curved surface 121 and the second curved surface 122 . It can be seen from the Venturi effect that when the intake vortex 300 reaches the highest point of the first curved surface 121, the flow area becomes smaller and the air flow velocity increases, thereby generating an adsorption effect on the second curved surface 122, making the surrounding area of the second curved surface 122 The airflow also flows toward the second curved surface 122, thereby forming the first partial vortex 310. The third curved surface 123 smoothly connects the first curved surface 121 and the second curved surface 122, so that the connection between the end of the first curved surface 121 close to the opening of the combustion chamber structure 100 and the end of the second curved surface 122 close to the opening of the combustion chamber structure 100 is not too steep As a result, the flow area of the intake vortex 300 decreases sharply when it flows through the junction of the first curved surface 121 and the second curved surface 122, thereby causing the intake swirl 300 to form a negative pressure at the junction of the first curved surface 121 and the second curved surface 122. If the space is too small, the size and intensity of the formed first partial vortex 310 may be too small, which will affect the mixing effect and combustion efficiency of the subsequent mixed gas.

In some embodiments, the tangent plane defining the vertex of the second curved surface 122 is a first plane, and there is an included angle between the first plane and the plane where the opening is located. In the embodiment shown in FIG. 2 , it can be seen that the spoiler 120 is arranged obliquely on the side wall of the accommodating cavity 130 , that is, there is an included angle between the first plane and the plane where the opening is located. When the intake vortex 300 enters the combustion chamber structure 100 through the spiral intake passage 200, the direction of the intake vortex 300 has a certain inclination angle on the plane where the opening is located, and the spoiler 120 is placed on the side wall of the accommodation chamber 130. The inclined setting can cater to the entry direction of the intake vortex 300 to a greater extent, so that the intake vortex 300 can maintain the same flow direction and flow to the middle part of the first curved surface 121, avoiding the energy of the intake vortex 300 caused by changing the flow direction. The loss improves the working efficiency of the spoiler 120 .

In some embodiments, the included angle is 30°-50°. The inventor found through research that when the included angle is within a certain range, as much intake vortex 300 as possible can flow to the middle part of the first curved surface 121, so when the included angle is 30°-50°, the turbulence Part 120 can exert the greatest effect. When the included angle is less than 30 degrees, although the intake vortex 300 can reach the first curved surface 121 at this time, it is difficult to flow to the middle part of the first curved surface 121, and most of the intake vortex 300 is affected by the first curved surface 121. The original flow direction is changed due to the blockage of the gas flow, which leads to the energy loss of the intake vortex 300 itself, which reduces the formation rate of the first partial vortex 310 and reduces the mixing rate of gas and air, which is not conducive to the combustion chamber structure 100. Complete combustion of the internal gas mixture. When the included angle is greater than 50 degrees, it is difficult for the intake vortex 300 arriving on the first curved surface 121 to flow to the middle part of the first curved surface 121, and most of the intake vortex 300 is changed due to being blocked by the first curved surface 121. The original flow direction caused the energy loss of the intake vortex 300 itself, thereby reducing the formation rate of the first partial vortex 310 and reducing the mixing rate of gas and air, which is not conducive to the full mixing of the gas mixture in the combustion chamber structure 100. combustion. Understandably, the included angle may be, but not limited to, 30 degrees, 35 degrees, 40 degrees, 45 degrees or 50 degrees.

Fig. 6 shows a schematic diagram of the formation of the tumble flow 330 in the combustion chamber structure 100 according to an embodiment of the present application.

It should be noted that, during the intake stroke phase, the operation of the piston increases the angular momentum of the gas mixture in the accommodation chamber 130 to form a tumble flow 330 .

Referring to FIG. 6 , in some embodiments, the accommodating chamber 130 further has a flow guide portion 140 , and the flow guide portion 140 is configured by the bottom wall of the accommodating chamber 130 protruding toward the opening direction. When the intake vortex 300 enters the combustion chamber structure 100, not only the first partial vortex 310 will be formed on the side wall of the accommodation cavity 130 through the spoiler 120, but also the first partial vortex 310 will be formed in the vertical direction of the accommodation cavity 130 through the guide part 140. A tumble 330 is formed. The convex structure of the bottom wall of the receiving cavity 130 is beneficial to the flow of the mixed air flow, and can improve the formation of the tumble flow 330 movement. The newly formed tumble flow 330 can make the gas and air mix more evenly, thereby speeding up the propagation speed of the flame.

Due to the setting of the flow guide part 140 , the bottom wall of the accommodating chamber 130 has an inclined surface 141 . The inclined surface 141 can further accelerate the flow velocity of the mixed gas, so that the gas is mixed more uniformly and the combustion is more complete.

In some embodiments, as shown in FIG. 3 , the side wall of the housing chamber 130 and the bottom wall of the housing chamber 130 are smoothly connected with large rounded corners, which can guide the airflow of the mixed gas and prevent the occurrence of combustion dead zones, so that the air in the housing chamber 130 The mixed gas can be fully burned.

In some embodiments, the air guiding part 140 is configured as a center-symmetric structure. The guide part 140 is located at the center of the bottom wall of the housing chamber 130 and has a centrally symmetrical structure, which enables the intake vortex 300 to form a tumble flow 330 in the vertical space of each position of the housing chamber 130, further accelerating the flow rate in the housing chamber 130. The mixing speed of gas and air makes the mixed gas more evenly mixed.

In the foregoing, due to the Venturi effect, a local negative pressure zone is formed on the third curved surface 123, which causes a pressure difference, and the mixed gas near the position of the second curved surface 122 moves along the The second curved surface 122 flows to the local negative pressure area, and the mixed gas from other positions is continuously replenished into the middle part of the second curved surface 122, thereby forming a first local area perpendicular to the direction of the side wall of the accommodation chamber 130 in the middle part of the second curved surface 122. Vortex 310.

Referring to FIG. 2, in some embodiments, the local vortex formed on one side of the second curved surface 122 exists not only in the middle of the second curved surface 122, but also at the end of the second curved surface 122 that is close to the opening and the bottom wall of the accommodating cavity 130, respectively. One end also generates a second local vortex 320 parallel to the side wall of the accommodation cavity 130 due to the existence of a local negative pressure area. Since the size of the second partial vortex 320 is small, it will not affect the overall flow direction of the mixed gas, but can speed up the flow rate and mixing effect of the mixed gas.

It should be noted that the engine in this application adopts a compression ratio of 14-17, so that the power of the engine is greater, the power is higher, the efficiency is higher, and the fuel consumption is less. When the compression ratio is less than 14-17, the power of the engine is insufficient, the power and efficiency are not high, and the function of the combustion chamber structure 100 may not be satisfied. When the engine compression ratio is greater than 14-17, the stability will be reduced and the engine life will be shortened.

In some embodiments, the surface of the combustion chamber body 110 facing the direction of the intake passage 200 has a support portion 150. As shown in FIG. On the surface on the side of the intake valve direction. When the engine is in the intake stroke, the intake valve moves toward the opening of the combustion chamber body 110 , and the setting of the support portion 150 can prevent the intake valve from crushing the combustion chamber body 110 during the intake stroke, thereby causing the intake valve to be damaged.

In some embodiments, the tip of the spoiler 120 close to the bottom wall of the receiving cavity 130 and the tip of the spoiler close to the opening are set to have a tendency to approach each other in the plane space where the first curved surface 121 is located. As shown in FIG. 2 , the advantage of such an arrangement is that when the intake vortex 300 enters the accommodation cavity 130 , as many intake vortexes 300 as possible can pass through the first curved surface 121 , avoiding approaching the accommodation cavity from the first curved surface 121 respectively. The bottom wall of 130 flows out from both ends of the opening of the accommodating cavity 130 , so that more intake vortices 300 can be transformed into first partial vortices 310 and second partial vortices 320 , improving the combustion efficiency of the mixed gas.

In addition, the body shape of the combustion chamber body 110 in this application is an open basin shape, which can make the combustion chamber body 110 have a smaller surface-to-volume ratio, reduce the heat loss of the mixed gas in the accommodating chamber 130, and improve combustion efficiency.

The present application provides an engine, including the above-mentioned combustion chamber structure 100 . By setting the spoiler 120 in the combustion chamber structure 100, the flow velocity and flow direction of the intake vortex 300 entering the combustion chamber structure 100 are changed, thereby changing the size and strength of the intake vortex 300, so that the gas is mixed more uniformly, The speed of flame propagation is accelerated, and the combustion efficiency of the engine is improved.

In the combustion chamber structure 100 provided by the embodiment of the present application, at least two spoilers 120 are arranged in the combustion chamber structure 100, and the spoilers 120 are configured to change the flow velocity and flow direction of the intake vortex 300, thereby making it possible to enter the combustion chamber structure The flow velocity and flow direction of the intake vortex 300 in 100 are changed, changing the size and strength of the intake vortex 300, making the gas mixing more uniform, speeding up the flame propagation rate and improving the combustion efficiency. Wherein, the spoiler 120 uniformly distributed along the circumference of the side wall of the accommodating chamber 130 makes the first partial vortex 310 generated in the entire combustion chamber structure 100 symmetrical, so that the mixed gas can be mixed more uniformly. Moreover, the spoiler 120 is arranged obliquely on the side wall of the accommodating cavity 130 to cater to the entry direction of the intake vortex 300 to a greater extent, so that the intake vortex 300 can maintain the same flow direction and flow to the middle of the first curved surface 121 In terms of position, the energy loss of the intake vortex 300 caused by changing the flow direction is avoided, and the working efficiency of the spoiler 120 is improved. The combustion chamber structure 100 also includes a guide part 140, by means of the guide part 140, the mixed gas can form a tumble flow 330 in the space of the accommodating cavity 130, and the guide part 140 is arranged as a centrally symmetrical structure, which can further accelerate the flow of the mixed gas. the mixing rate. The support portion 150 on the combustion chamber body 110 can prevent the intake valve from crushing the combustion chamber body 110 during the intake stroke, thereby reducing the probability of the intake valve being damaged. In addition, the side wall of the accommodation chamber 130 and the bottom wall of the accommodation chamber 130 are smoothly connected with large rounded corners, which can guide the airflow of the mixed gas and prevent combustion dead zones, so that the mixed gas in the accommodation chamber 130 can be fully burned . It should also be noted that the engine using the combustion chamber structure 100 of the present application adopts a compression ratio of 14-17, which has greater power, higher power, higher efficiency and less fuel consumption.

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

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A combustion chamber structure comprising:

a combustion chamber body having a receiving chamber and an opening communicating with the receiving chamber; the opening is used for enabling the air inlet vortex flow to flow into the accommodating cavity; and

At least two turbulence pieces, all of which are arranged on the side wall of the accommodating cavity at intervals;

wherein the spoiler is configured to be able to change the flow speed and direction of the intake swirl.

2. The combustion chamber structure of claim 1, wherein the spoiler has a first curved surface and a second curved surface disposed opposite to each other, the first curved surface and the second curved surface being smoothly connected to a side wall of the accommodating chamber, respectively.

3. The combustor structure of claim 2, wherein the curvature of the first curved surface and the second curved surface is graded.

4. The combustor structure of claim 1, wherein all of said turbulators are uniformly distributed circumferentially along a sidewall of said receiving cavity.

5. The combustor structure of claim 1, wherein the spoiler further has a third curved surface;

the third curved surface is smoothly connected between the first curved surface and the second curved surface.

6. The combustor structure of claim 2, wherein a tangent plane defining an apex of the second curved surface is a first plane;

an included angle is formed between the first plane and the plane where the opening is located.

7. The combustion chamber structure of claim 6, wherein the included angle is 30 degrees to 50 degrees.

8. The combustor structure of claim 1, wherein the receiving chamber further has a flow guide;

the flow guiding part is formed by protruding the bottom wall of the accommodating cavity towards the opening direction.

9. The combustor structure of claim 8, wherein the flow guide is configured as a centrosymmetric structure.

10. An engine comprising a combustion chamber arrangement according to any one of claims 1-9.

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