Engines and vehicles

Abstract

This application relates to an engine and a vehicle, specifically in the field of engine technology. The engine includes a cylinder head, an intake component, and a first intake valve. By adjusting the opening degree, opening time, and closing time of the first intake valve, the amount of air entering the combustion chamber can be precisely controlled, thereby affecting the engine's combustion process, power output, and fuel efficiency. A plane perpendicular to the central axis of the first mounting hole is defined as a first reference plane, and a first reference line lies on the first reference plane. The first reference line intersects the central axis of the first mounting hole at a first center point. The angle between the extension direction of the tangent of the first reference line at the first center point and the first direction is set to 42 to 44 degrees. This allows the airflow to form a large tangential flow velocity with the cylinder wall, thereby creating an intake vortex. This achieves both high charging efficiency and appropriate vortex, balancing the flow coefficient and vortex, which is beneficial for improving the engine's fuel efficiency.

Description

Technical Field

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

[0002] To achieve good power, economy, and emissions characteristics, engines must have sufficiently high intake port flow coefficients and appropriate parameters such as intake swirl ratio and tumble ratio. Swirls help improve fuel-air mixing and enhance combustion quality, while high flow coefficients increase intake volume, optimize the air-fuel ratio, and reduce pumping losses. However, achieving a balance between these two aspects is a challenge in engine design, requiring comprehensive consideration of multiple factors and optimized design. Summary of the Invention

[0003] Based on this, this application provides an engine and vehicle that can balance the engine's vortex and flow coefficient.

[0004] According to one aspect of this application, an embodiment of this application provides an engine, comprising:

[0005] The cylinder head is equipped with a combustion chamber for gas combustion and an air intake port that communicates with the combustion chamber.

[0006] The intake component includes a first intake section and a second intake section; the first intake section has a first end connected to the cylinder head, and the first end has a first mounting hole that is opposite to and communicates with the intake port; the first intake section has a first airflow passage that communicates with the intake port; and

[0007] The first intake valve includes a first part and a second part connected together. The first part is located in the combustion chamber, and the second part extends out of the first intake part through the intake port and the first mounting hole. The first airflow passage is connected to the combustion chamber through the first connecting part. The maximum lift position of the first intake valve is above the first connecting part. When the first part of the first intake valve passes through the first connecting part, there is a gap between the first part and the inner surface of the first connecting part.

[0008] The first airflow channel is configured to extend along a first reference line, the first reference line is configured to be a line with continuous curvature, and the inner wall of the first airflow channel is configured to guide the airflow located in the first airflow channel to flow along the extension path of the first airflow channel.

[0009] A plane perpendicular to the central axis of the first mounting hole is defined as the first reference plane, and a first reference line is located on the first reference plane. The first reference line intersects the central axis of the first mounting hole at a first center point. The angle between the extension direction of the tangent of the first reference line at the first center point and the first direction is 42 degrees to 44 degrees.

[0010] In one embodiment, the air intake component further includes a second air intake portion spaced apart from the first air intake portion along a first direction. The second air intake portion has a second end connected to the cylinder head. The second end is provided with a second mounting hole that is opposite to and communicates with the air intake port. The second air intake portion is provided with a second airflow passage that communicates with the air intake port.

[0011] The engine also includes a second intake valve, which includes a third part and a fourth part connected together. The third part is located in the combustion chamber, and the fourth part extends out of the first intake part through an intake port and a mounting hole. The second airflow passage communicates with the combustion chamber through the second connecting part. The maximum lift position of the second intake valve is above the second connecting part. When the third part of the second intake valve passes through the second connecting part, there is a gap between the third part and the inner surface of the second connecting part.

[0012] The second airflow channel is configured to extend along the second reference line, the second reference line is configured to be a line with continuous curvature, and the inner wall of the second airflow channel is configured to guide the airflow in the second airflow channel to flow along the extension path of the second airflow channel.

[0013] A plane perpendicular to the central axis of the second mounting hole is defined as the second reference plane, and a second reference line is located on the second reference plane. The second reference line is relative to the central axis of the second mounting hole at the second center point. The angle between the extension direction of the tangent of the second reference line at the second center point and the first direction is 68 degrees to 70 degrees. The first reference plane and the second reference plane are parallel.

[0014] In one embodiment, along the extending direction of the first air intake, the first air intake has a third end disposed opposite to the first end; along the extending direction of the second air intake, the second air intake has a fourth end disposed opposite to the second end;

[0015] The engine also includes a connector that connects the second end and the fourth end, and the connector has a connecting channel that connects the first airflow passage and the second airflow passage;

[0016] The orthographic projections of the sidewalls of the first and second air intakes facing each other on the first reference plane are the first projection line and the second projection line, respectively; the sidewall of the connector is the connecting line on the first reference plane; the endpoints of the first and second projection lines that are close to each other are connected by the connecting line.

[0017] The connecting line is located on the first reference circle, and the center of the first reference circle is on the side of the connecting line closer to the first air intake and the second air intake.

[0018] In one embodiment, the first projection line is located on the second reference circle, and the center of the second reference circle is located on the side of the first projection line closer to the second air intake; the second reference circle and the first reference circle are tangent at the endpoint where the first projection line and the connecting line meet; the radius of the first reference circle is R1, and the radius of the second reference circle is R2, where R1 and R2 satisfy: R2 / R1 = 2.87 - 2.88; and / or

[0019] The second projection line is located on the third reference circle, and the center of the third reference circle is located on the side of the second projection line closer to the first air intake. The third reference circle and the first reference circle are tangent at the endpoints where the second projection line and the connecting line are connected. The radius of the first reference circle is R1, and the radius of the third reference circle is R3. R1 and R3 satisfy: R3 / R1=7.03-7.04.

[0020] In one embodiment, the first reference line includes a first arc segment and a second arc segment that are smoothly connected to each other, wherein the endpoint of the second arc segment away from the first arc segment coincides with the first center point; the first arc segment is located on a fourth reference circle, the second arc segment is located on a fifth reference circle, and the center of the fourth reference circle and the center of the fifth reference circle are both located on the side of the first reference line closer to the second air intake.

[0021] Wherein, the radius of the first reference circle is R1, and the radius of the fourth reference circle is R4, and R1 and R4 satisfy: R4 / R1 = 3.88 - 3.89; and / or

[0022] The radius of the first reference circle is R1, and the radius of the fifth reference circle is R5. R1 and R5 satisfy: R5 / R1 = 7.22 - 7.23.

[0023] In one embodiment, the second reference line includes a third arc segment and a fourth arc segment that are smoothly connected to each other. The endpoint of the third arc segment away from the fourth arc segment is close to the connector. The third arc segment is located in a sixth reference circle, and the fourth arc segment is located in a seventh reference circle. The center of the sixth reference circle is located on the side of the second reference line away from the first air intake, and the center of the seventh reference circle is located on the side of the second reference line close to the first air intake.

[0024] Wherein, the radius of the first reference circle is R1, and the radius of the sixth reference circle is R6, and R1 and R6 satisfy: R6:R1 = 9.27 - 9.28; and / or

[0025] The radius of the first reference circle is R1, and the radius of the seventh reference circle is R7. R1 and R7 satisfy: R7:R1=5.93-5.94.

[0026] In one embodiment, the second airflow passage is configured as a tangential airway; and / or

[0027] The surface roughness of the wall of the second air intake is less than 0.1.

[0028] In one embodiment, the length of the first air intake along the extension path of the first air intake is less than the length of the second air intake along the extension path of the second air intake; the second airflow channel is configured to extend along a second reference line, the second reference line is configured to be a line with continuous curvature, and the curvature of the first reference line is greater than the curvature of the second reference line.

[0029] In one embodiment, the first airflow passage is configured as a tangential airway; and / or

[0030] The surface roughness of the wall of the first air intake is less than 0.1.

[0031] According to another aspect of this application, embodiments of this application provide a vehicle including the engine of any of the above embodiments.

[0032] The aforementioned engine and vehicle include a cylinder head, an intake assembly, and a first intake valve. The cylinder head has a combustion chamber for gas combustion and an intake port communicating with the combustion chamber. The intake assembly includes a first intake section with a first airflow passage communicating with the intake port, thereby connecting the first airflow passage to the combustion chamber and transmitting air to the combustion chamber in the cylinder head. By adjusting the opening degree, opening time, and closing time of the first intake valve, the amount of air entering the combustion chamber can be precisely controlled, thus affecting the engine's combustion process, power output, and fuel efficiency. A plane perpendicular to the central axis of the first mounting hole is defined as the first reference plane, and a first reference line is located on the first reference plane. The first reference line intersects the central axis of the first mounting hole at a first center point. The angle between the extension direction of the tangent of the first reference line at the first center point and the first direction is set to 42 to 44 degrees. This allows the airflow to form a large tangential flow velocity with the cylinder wall, thereby forming an intake vortex. This achieves both high charging efficiency and appropriate vortex, balancing the flow coefficient and vortex, which is beneficial to improving the engine's fuel efficiency. Attached Figure Description

[0033] Figure 1 This is a partial structural diagram of the engine in some embodiments of this application.

[0034] Figure 2 for Figure 1 A top-view diagram of part of the engine structure.

[0035] Figure 3 for Figure 1 Another top view of part of the engine structure.

[0036] Figure 4 for Figure 1 Another top view of part of the engine structure.

[0037] Figure 5 for Figure 1 Another top view of part of the engine structure.

[0038] The reference numerals in the detailed embodiments are as follows:

[0039] 1. Cylinder head; 11. Combustion chamber; 21. First intake section; 22. Second intake section; X1. First reference line; HD1. First arc segment; HD2. Second arc segment; X2. Second reference line; HD3. Third arc segment; HD4. Fourth arc segment; D1. First center point; D2. Second center point; Q1. First intake valve; Q2. Second intake valve; 3. Connector; T1. First projection line; T2. Second projection line; L1. Connecting line; Y1. First reference line. Reference circle, Y2, second reference circle, Y3, third reference circle, Y4, fourth reference circle, Y5, fifth reference circle, Y6, sixth reference circle, Y7, seventh reference circle, QD1, first airflow channel, QD2, second airflow channel, θ1, the angle between the extension direction of the first reference line X1 at the first center point D1 and the first direction F1, θ2, the angle between the extension direction of the second reference line X2 at the second center point D2 and the first direction F1, F1, first direction. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar tables used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0046] See Figure 1 , Figure 1 A partial structural schematic diagram of an engine according to some embodiments of this application is shown. One embodiment of this application provides an engine including a cylinder head 1 and an intake component. The cylinder head 1 is provided with a combustion chamber 11 for gas combustion and an intake port communicating with the combustion chamber 11.

[0047] Combustion chamber 11 is where fuel and air mix and burn. In combustion chamber 11, the fuel and air mix and are ignited by a spark plug or compression ignition, producing high-temperature, high-pressure combustion gases. These gases drive the piston, converting chemical energy into mechanical energy to power the engine. The intake components are part of the engine's intake system, and their main function is to guide air or an air-fuel mixture from the external environment into the engine's combustion chamber 11.

[0048] Continue reading Figure 1 And in conjunction with reference Figure 2 , Figure 2 for Figure 1 The diagram shows a top view of a portion of the engine's structure. The intake component includes a first intake section 21, which has a first end connected to the cylinder head. The first end has a first mounting hole that is opposite to and communicates with the intake port. The first intake section 21 contains a first airflow passage QD1 that communicates with the intake port. The first airflow passage QD1 is configured to extend along a first reference line X1, which is a line with continuous curvature. The inner wall of the first airflow passage QD1 is configured to guide the airflow within the first airflow passage QD1 along its extension path.

[0049] The first intake valve Q1 includes a first part and a second part connected together. The first part is located inside the combustion chamber 11, and the second part extends out of the first intake section 21 through the intake port and the first mounting hole. The first airflow passage QD1 communicates with the combustion chamber 11 through the first connecting part. The maximum lift position of the first intake valve Q1 is above the first connecting part. When the first part of the first intake valve Q1 passes through the first connecting part, there is a gap between the first part and the inner surface of the first connecting part. By adjusting the opening degree, opening time, and closing time of the first intake valve Q1, the amount of air entering the combustion chamber 11 can be precisely controlled, thereby affecting the engine's combustion process, power output, and fuel efficiency.

[0050] Curvature continuity means that the curvature of a curve at a certain point is the same as the curvature at other points in the vicinity of that point, or changes smoothly according to a certain pattern, without abrupt changes or discontinuities.

[0051] A plane perpendicular to the central axis of the first mounting hole is defined as the first reference plane, and the first reference line X1 is located on the first reference plane. The first reference line X1 intersects the central axis of the first mounting hole at the first center point D1. The angle between the extension direction of the tangent of the first reference line X1 at the first center point D1 and the first direction F1 is 42 to 44 degrees, which makes the airflow form a large tangential flow velocity with the cylinder head 1 wall, thereby forming an intake vortex. This achieves both high charging efficiency and appropriate vortex, balancing the flow coefficient and vortex, which is beneficial to improving the fuel efficiency of the engine.

[0052] In some embodiments of this application, see further reference. Figure 1 and Figure 2 The air intake component also includes a second air intake 22 spaced apart from the first air intake 21 along a first direction F1. Providing two air intakes, the first air intake 21 and the second air intake 22, increases the amount of air entering the engine compared to providing a single air intake. Furthermore, multiple air intakes can be designed with different shapes and lengths to optimize airflow speed and pressure, thereby improving intake efficiency.

[0053] The second intake section 22 has a second end connected to the cylinder head 1. The second end is provided with a second mounting hole that is opposite to and communicates with the intake port. The second intake section 22 is provided with a second airflow passage QD2 that communicates with the intake port.

[0054] The engine also includes a second intake valve Q2, which comprises a third part and a fourth part connected together. The third part is located inside the combustion chamber 11, and the fourth part extends out of the first intake section 21 via an intake port and a mounting hole. A second airflow passage QD2 communicates with the combustion chamber 11 through a second connecting part. The maximum lift position of the second intake valve Q2 is above the second connecting part 22. When the third part of the second intake valve Q2 passes through the second connecting part 22, there is a gap between the third part and the inner surface of the second connecting part 22. The second airflow passage QD2 is configured to extend along a second reference line X2, which is a line with continuous curvature. The inner wall of the second airflow passage QD2 is configured to guide the airflow within the second airflow passage QD2 along its extension path. A plane perpendicular to the central axis of the second mounting hole is defined as the second reference plane, and the second reference line X2 lies on the second reference plane. The second reference line X2 is perpendicular to the central axis of the second mounting hole relative to the second center point D2. The angle between the extension direction of the tangent of the second reference line X2 at the second center point D2 and the first direction F1 is 68 to 70 degrees. The first and second reference planes are parallel. The extension path of the second airflow channel QD2 is designed in such a way that the airflow forms a large tangential flow velocity with the cylinder head 1 wall, thereby forming an intake vortex. This achieves both high charging efficiency and appropriate vortex, balancing the flow coefficient and vortex, which is beneficial to improving the engine's fuel efficiency. The parallel arrangement of the first and second reference planes means that the central axes of the first and second mounting holes are also parallel to each other. The parallel arrangement of the first and second mounting holes allows the first intake valve Q1 and the second intake valve Q2 to be aligned after installation, which is beneficial to achieving synchronous movement of the intake valves in the same direction.

[0055] In some embodiments of this application, reference continues to be made to... Figure 1 and Figure 2Along the extending direction of the first air intake 21, the first air intake 21 has a third end disposed opposite to the first end; along the extending direction of the second air intake 22, the second air intake 22 has a fourth end disposed opposite to the second end.

[0056] The engine also includes a connector 3, which connects the second end and the fourth end. Connector 3 has a connecting channel linking the first airflow passage QD1 and the second airflow passage 1D2. This allows air to be delivered from connector 3 into the first air intake 21 and then into the combustion chamber 11. One end of the second air intake 22 along its extending direction is connected to connector 3, and the other end is connected to the combustion chamber 11. Similarly, air can also be delivered from connector 3 into the second air intake 22 and then into the combustion chamber 11.

[0057] The orthographic projections of the sidewalls of the first air intake 21 and the second air intake 22 facing each other on the first reference plane are the first projection line T1 and the second projection line T2, respectively. The sidewall of the connector 3 is connected by a connecting line L1 on the first reference plane; the endpoints of the first projection line T1 and the second projection line T2 that are close to each other are connected by the connecting line L1.

[0058] The connecting line L1 is located on the first reference circle Y1, and the center of the first reference circle Y1 is on the side of the connecting line L1 that is close to the first air intake 21 and the second air intake 22.

[0059] For details, please refer to this application. Figure 2 The length of the first air intake 21 is shorter than the length of the second air intake 22. The longer second air intake 22 can directly introduce more air into the combustion chamber 11, while the shorter first air intake 21 can be used to form more vortices.

[0060] In some embodiments of this application, reference continues to be made to... Figure 2 and in conjunction with reference Figure 3 , Figure 3 It shows Figure 1This is another top view of a portion of the engine's structure. The first projection line T1 lies on the second reference circle Y2, and the center of the second reference circle Y2 is located on the side of the first projection line T1 closest to the second air intake 22. The second reference circle Y2 and the first reference circle Y1 are tangent at the endpoint where the first projection line T1 and the connecting line L1 meet. The radius of the first reference circle Y1 is R1, and the radius of the second reference circle Y2 is R2. R1 and R2 satisfy: R2:R1 = 2.87 - 2.88; and / or, the second projection line T2 lies on the third reference circle Y3, and the center of the third reference circle Y3 is located on the side of the second projection line T2 closest to the first air intake 21. The third reference circle Y3 and the first reference circle Y1 are tangent at the endpoint where the second projection line T2 and the connecting line L1 meet. The radius of the first reference circle Y1 is R1, and the radius of the third reference circle Y3 is R3. R1 and R3 satisfy: R3:R1 = 7.03 - 7.04.

[0061] Given that "the first projection line T1 is located on the second reference circle Y2, and the center of the second reference circle Y2 is located on the side of the first projection line T1 closer to the second air intake 22; the second reference circle Y2 and the first reference circle Y1 are tangent at the endpoints where the first projection line T1 and the connecting line L1 are connected. The radius of the first reference circle Y1 is R1, and the radius of the second reference circle Y2 is R2, with R1 and R2 satisfying: R2:R1=2.87-2.88", in the design of the air intake component, a larger radius R2 of the second reference circle Y2 means a smoother first projection line T1, allowing the airflow to enter the combustion chamber 11 faster, improving intake efficiency and thus increasing the flow coefficient. However, a larger radius R2 also leads to a reduction in vortices. Therefore, to simultaneously achieve suitable vortices and a high flow coefficient, R2 cannot be designed to be too large or too small. The applicant found that when the value of R2:R1 is in the range of 2.87-2.88, it is possible to achieve both suitable vortices and a high flow coefficient. The "flow coefficient" is used to describe the ability of fluid to flow through valves, pipes or other fluid control equipment, and is an important parameter for measuring the performance of fluid control equipment.

[0062] In the case where "the second projection line T2 is located on the third reference circle Y3, the center of the third reference circle Y3 is located on the side of the second projection line T2 closer to the first air intake 21; the third reference circle Y3 and the first reference circle Y1 are tangent at the endpoints where the second projection line T2 and the connecting line L1 are connected, the radius of the first reference circle Y1 is R1, the radius of the third reference circle Y3 is R3, and R1 and R3 satisfy: R3:R1=7.03-7.04", the second air intake 22 is longer than the first air intake 21. Its main function is to quickly guide the airflow into the combustion chamber 11. Therefore, the second projection line T2 is designed to be smoother to reduce the energy loss of the airflow during the flow process. The applicant found that when the value of R3:R1 is in the range of 7.03-7.04, it can have both suitable vortices and a high flow coefficient.

[0063] Furthermore, in the design of the first projection line T1, the second projection line T2, and the connecting line L1, the spacing between the first projection line T1 and the second projection line T2 gradually decreases.

[0064] The aforementioned "first projection line T1 is located on the second reference circle Y2, and the center of the second reference circle Y2 is located on the side of the first projection line T1 near the second air intake 22; the second reference circle Y2 and the first reference circle Y1 are tangent at the endpoint where the first projection line T1 and the connecting line L1 are connected. The radius of the first reference circle Y1 is R1, and the radius of the second reference circle Y2 is R2, with R1 and R2 satisfying: R2:R1=2.87-2.88" and "second projection line T2 is located on the third reference circle Y3, and the center of the third reference circle Y3 is located on the side of the second projection line T2 near the first air intake 21; the third reference circle Y3 and the first reference circle Y1 are tangent at the endpoint where the second projection line T2 and the connecting line L1 are connected. The radius of the first reference circle Y1 is R1, and the radius of the third reference circle Y3 is R3, with R1 and R3 satisfying: R3:R1=7.03-7.04" can be arbitrarily combined and set according to actual conditions.

[0065] In some embodiments of this application, reference continues to be made to... Figure 2 and Figure 3 and in conjunction with reference Figure 4 , Figure 4 It shows Figure 1Another top view of the engine's partial structure. The first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 connected to each other. The endpoint of the second arc segment HD2 away from the first arc segment HD1 coincides with the first center point D1. The first arc segment HD1 is located on the fourth reference circle Y4, and the second arc segment HD2 is located on the fifth reference circle Y5. The centers of the fourth reference circle Y4 and the fifth reference circle Y5 are both located on the side of the first reference line X1 closer to the second air intake 22. The radius of the first reference circle Y1 is R1, and the radius of the fourth reference circle Y4 is R4. R1 and R4 satisfy: R4:R1=3.88-3.89; and / or, the radius of the first reference circle Y1 is R1, and the radius of the fifth reference circle Y5 is R5. R1 and R5 satisfy: R5:R1=7.22-7.23.

[0066] In the case that "the first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 connected to each other, the endpoint of the second arc segment HD2 away from the first arc segment HD1 coincides with the first center point D1; the first arc segment HD1 is located on the fourth reference circle Y4, the second arc segment HD2 is located on the fifth reference circle Y5, and the center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air intake 22, wherein the radius of the first reference circle Y1 is R1, the radius of the fourth reference circle Y4 is R4, and R1 and R4 satisfy: R4:R1=3.88-3.89", the applicant found that when the value of R4:R1 is between 3.88 and 3.89, a large vortex can be generated rapidly in the first airflow channel QD1.

[0067] In the case that "the first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 connected to each other, the endpoint of the second arc segment HD2 away from the first arc segment HD1 coincides with the first center point D1; the first arc segment HD1 is located on the fourth reference circle Y4, the second arc segment HD2 is located on the fifth reference circle Y5, the center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air intake 22, the radius of the first reference circle Y1 is R1, the radius of the fifth reference circle Y5 is R5, and R1 and R5 satisfy: R5:R1=7.22-7.23", the applicant found that when R5:R1 is 7.22-7.23, the airflow generates a large vortex after passing through the first arc segment HD1, which prolongs the flow path of the airflow, and then can enter the combustion chamber 11 more quickly after passing through the second arc segment HD2.

[0068] "Smooth connection" means that the connection between the first arc segment HD1 and the second arc segment HD2 is not abrupt, but rather a continuous and gradual connection, so that the curvature change at the connection is uniform and there are no obvious corners or protrusions.

[0069] The aforementioned "first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 that are smoothly connected to each other. The termination point of the second arc segment HD2 is the first center point D1. The first arc segment HD1 is located on the fourth reference circle Y4, and the second arc segment HD2 is located on the fifth reference circle Y5. The center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 closest to the second air intake 22. The radius of the fourth reference circle Y4 is R4, and R1 and R4 satisfy: R4:R1=3.88-3.89" and "first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 that are smoothly connected to each other. The termination point of the second arc segment HD2 is the first center point D1. The first arc segment HD1 is located on the fourth reference circle Y4, and the second arc segment HD2 is located on the fifth reference circle Y5. The center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 closest to the second air intake 22. The radius of the fifth reference circle Y5 is R5. R1 and R5 satisfy: R5:R1=7.22-7.23". They can be arbitrarily combined and set according to actual conditions.

[0070] In some embodiments of this application, reference continues to be made to... Figures 2 to 4 and in conjunction with reference Figure 5 , Figure 5 It shows Figure 1 This is another top view of a portion of the engine structure. The second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 that are smoothly connected to each other. The endpoint of the third arc segment HD3, away from the fourth arc segment HD4, is close to the connector 3. The third arc segment HD3 is located in the sixth reference circle Y6, and the fourth arc segment HD4 is located in the seventh reference circle Y7. The center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake 21, and the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake 21. The radius of the first reference circle Y1 is R1, and the radius of the sixth reference circle Y6 is R6. R1 and R6 satisfy: R6:R1 = 9.27-9.28; and / or, the radius of the first reference circle Y1 is R1, and the radius of the seventh reference circle Y7 is R7. R1 and R7 satisfy: R7:R1 = 5.93-5.94.

[0071] In the case where "the second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 that are smoothly connected to each other, the endpoint of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connector 3, the third arc segment HD3 is located in the sixth reference circle Y6, the fourth arc segment HD4 is located in the seventh reference circle Y7, the center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake 21, the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake 21, the radius of the first reference circle Y1 is R1, the radius of the sixth reference circle Y6 is R6, and R1 and R6 satisfy: R6:R1=9.27-9.28", the applicant found that by designing the third arc segment HD3 in this way, the curvature of the third arc segment HD3 is smaller, and the third arc segment HD3 is more straight, which allows the vortex to enter the combustion chamber 11 more quickly.

[0072] In the case that "the second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 that are smoothly connected to each other, the end of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connector 3, the third arc segment HD3 is located in the sixth reference circle Y6, the fourth arc segment HD4 is located in the seventh reference circle Y7, the center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake 21, the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake 21, the radius of the first reference circle Y1 is R1, the radius of the seventh reference circle Y7 is R7, and R1 and R7 satisfy: R7:R1=5.93-5.94", after the airflow flows rapidly along the third arc segment HD3, the centers of the third reference circle Y3 where the third arc segment HD3 is located and the fourth reference circle Y4 where the fourth arc segment HD4 is located are located on different sides of the second reference line X2, so that the airflow direction tends to be straight and can be introduced into the combustion chamber 11.

[0073] The aforementioned "second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 that are smoothly connected to each other. The endpoint of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connector 3. The third arc segment HD3 is located in the sixth reference circle Y6, and the fourth arc segment HD4 is located in the seventh reference circle Y7. The center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake 21, and the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake 21. The radius of the first reference circle Y1 is R1, and the radius of the sixth reference circle Y6 is R6. R1 and R6 satisfy: R6:R1=9.27-9.28" and "second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 that are smoothly connected to each other. The endpoint of the third arc segment HD3, which is away from the fourth arc segment HD4, is close to the connector 3. The third arc segment HD3 is located in the sixth reference circle Y6, and the fourth arc segment HD4 is located in the seventh reference circle Y7. The center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake 21, and the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake 21. The radius of the first reference circle Y1 is R1, and the radius of the seventh reference circle Y7 is R7. R1 and R7 satisfy: R7:R1=5.93-5.94”, which can be arbitrarily combined and set according to actual conditions.

[0074] In some embodiments of this application, reference continues to be made to... Figure 1 and Figure 2 The second airflow channel QD2 is configured as a tangential airflow channel; and / or, the surface roughness of the wall of the second air intake 22 is less than 0.1.

[0075] When the second airflow passage QD2 is configured as a tangential airflow passage, the tangential airflow passage allows the airflow entering the second airflow passage QD2 to rotate, which helps to better mix fuel and air and improve combustion efficiency.

[0076] When the surface roughness of the wall of the second air intake 22 is less than 0.1, the smooth wall design can reduce the energy loss caused by the airflow encountering sharp parts, and the smooth wall reduces the friction between the airflow and the wall, thereby reducing frictional resistance and further improving the flow coefficient.

[0077] The aforementioned "the second airflow channel QD2 is constructed as a tangential airflow channel" and "the surface roughness of the wall of the second air intake 22 is less than 0.1" can be arbitrarily combined according to actual conditions.

[0078] In some embodiments of this application, reference continues to be made to... Figure 1 and Figure 2The length of the first air intake 21 along its extension path is less than the length of the second air intake 22 along its extension path; the second airflow channel QD2 is configured to extend along the second reference line X2, the second reference line X2 is configured to be a line with continuous curvature, and the curvature of the first reference line X1 is greater than the curvature of the second reference line X2.

[0079] The longer second air intake 22 can directly introduce more air into the combustion chamber 11, while the shorter first air intake 21 can be used to form more vortices. The second reference line X2 is constructed as a line with continuous curvature, and the curvature of the first reference line X1 is greater than that of the second reference line X2, so that the air can have both suitable vortices and a high flow coefficient during the process of being transported to the combustion chamber 11.

[0080] In some embodiments of this application, the first airflow channel QD1 is configured as a tangential airflow channel; and / or, the surface roughness of the wall of the first air intake 21 is less than 0.1.

[0081] When the first airflow passage QD1 is configured as a tangential airflow passage, the tangential airflow passage configuration can also cause the airflow entering the second airflow passage QD2 to rotate, which helps to better mix fuel and air and improve combustion efficiency.

[0082] When the surface roughness of the wall of the first air intake 21 is less than 0.1, the smooth wall design can reduce the energy loss caused by the airflow encountering sharp parts, and the smooth wall reduces the friction between the airflow and the wall, thereby reducing frictional resistance and further improving the flow coefficient.

[0083] The aforementioned "first airflow channel QD1 is constructed as a tangential airflow channel" and "the surface roughness of the wall of the first air intake 21 is less than 0.1" can be arbitrarily combined according to actual conditions.

[0084] According to some embodiments of this application, this application provides a vehicle including the engine in any of the above embodiments.

[0085] In the technical solutions of this application embodiment, since the vehicle includes the engine in any of the above embodiments, it also has the advantages of any of the above embodiments.

[0086] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0087] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An engine, characterized in that, include: The cylinder head is provided with a combustion chamber for gas combustion and an air intake port communicating with the combustion chamber; An air intake component includes a first air intake section; the first air intake section has a first end connected to the cylinder head, the first end is provided with a first mounting hole that is opposite to and communicates with the air intake port, and the first air intake section is provided with a first airflow passage that communicates with the air intake port. and The first intake valve includes a first part and a second part connected together. The first part is located in the combustion chamber, and the second part extends out of the first intake part through the intake port and the first mounting hole. The first airflow passage communicates with the combustion chamber through the first connecting part. The maximum lift position of the first intake valve is located above the first connecting part. When the first part of the first intake valve passes through the first connecting part, there is a gap between the first part and the inner surface of the first connecting part. The first airflow channel is configured to extend along a first reference line, the first reference line is configured to be a line with continuous curvature, and the inner wall of the first airflow channel is configured to guide the airflow located in the first airflow channel to flow along the extension path of the first airflow channel. A plane perpendicular to the central axis of the first mounting hole is defined as the first reference plane, and the first reference line is located on the first reference plane. The first reference line intersects the central axis of the first mounting hole at a first center point. The air intake component further includes a second air intake portion spaced apart from the first air intake portion. The second air intake portion has a second end connected to the cylinder head. The second end is provided with a second mounting hole that is opposite to and communicates with the air intake port. The second air intake portion is provided with a second airflow passage that communicates with the air intake port. The engine further includes a second intake valve, which includes a third part and a fourth part connected together. The third part is located in the combustion chamber, and the fourth part extends out of the first intake part through the intake port and the mounting hole. The second airflow passage communicates with the combustion chamber through the second connecting part. The maximum lift position of the second intake valve is located above the second connecting part. When the third part of the second intake valve passes through the second connecting part, there is a gap between the third part and the inner surface of the second connecting part. The second airflow channel is configured to extend along a second reference line, the second reference line is configured to be a line with continuous curvature, and the inner wall of the second airflow channel is configured to guide the airflow in the second airflow channel to flow along the extension path of the second airflow channel. A plane perpendicular to the central axis of the second mounting hole is defined as the second reference plane, and the second reference line is located on the second reference plane. The second reference line is located relative to the central axis of the second mounting hole at a second center point. The first reference plane and the second reference plane are parallel. Along the extending direction of the first air intake portion, the first air intake portion has a third end disposed opposite to the first end; along the extending direction of the second air intake portion, the second air intake portion has a fourth end disposed opposite to the second end; The engine further includes a connector, which is connected between the second end and the fourth end, and the connector has a communication channel connecting the first airflow channel and the second airflow channel; The orthographic projections of the sidewalls of the first air intake and the second air intake facing each other onto the first reference plane are respectively the first projection line and the second projection line; the sidewall of the connector is a connecting line on the first reference plane; the endpoints of the first projection line and the second projection line that are close to each other are connected by the connecting line. The connecting line is located on a first reference circle, and the center of the first reference circle is located on the side of the connecting line that is close to the first air intake and the second air intake. The first projection line is located on the second reference circle, and the center of the second reference circle is located on the side of the first projection line closer to the second air intake. The second reference circle and the first reference circle are tangent at the endpoint where the first projection line and the connecting line are connected. The radius of the first reference circle is R1, and the radius of the second reference circle is R2. R1 and R2 satisfy: R2 / R1 = 2.87-2.

88. The second projection line is located on the third reference circle, and the center of the third reference circle is located on the side of the second projection line closer to the first air intake. The third reference circle and the first reference circle are tangent at the endpoint where the second projection line and the connecting line are connected. The radius of the third reference circle is R3, and R1 and R3 satisfy: R3 / R1=7.03-7.

04.

2. The engine according to claim 1, characterized in that, The first reference line includes a first arc segment and a second arc segment that are smoothly connected to each other. The endpoint of the second arc segment away from the first arc segment coincides with the first center point. The first arc segment is located on a fourth reference circle, and the second arc segment is located on a fifth reference circle. The center of the fourth reference circle and the center of the fifth reference circle are both located on the side of the first reference line closer to the second air intake. Wherein, the radius of the first reference circle is R1, the radius of the fourth reference circle is R4, and R1 and R4 satisfy: R4 / R1 = 3.88 - 3.89; and / or The radius of the first reference circle is R1, and the radius of the fifth reference circle is R5. R1 and R5 satisfy: R5 / R1 = 7.22-7.

23.

3. The engine according to claim 1, characterized in that, The second reference line includes a third arc segment and a fourth arc segment that are smoothly connected to each other. The endpoint of the third arc segment away from the fourth arc segment is close to the connector. The third arc segment is located in the sixth reference circle, and the fourth arc segment is located in the seventh reference circle. The center of the sixth reference circle is located on the side of the second reference line away from the first air intake, and the center of the seventh reference circle is located on the side of the second reference line close to the first air intake. Wherein, the radius of the first reference circle is R1, and the radius of the sixth reference circle is R6, wherein R1 and R6 satisfy: R6:R1 = 9.27-9.28; and / or The radius of the first reference circle is R1, and the radius of the seventh reference circle is R7. R1 and R7 satisfy: R7:R1=5.93-5.

94.

4. The engine according to any one of claims 1 to 3, characterized in that, The second airflow channel is configured as a tangential airway; and / or The surface roughness of the wall of the second air intake is less than 0.

1.

5. The engine according to any one of claims 1 to 3, characterized in that, The length of the first air intake along its extension path is less than the length of the second air intake along its extension path; the second airflow channel is configured to extend along a second reference line, the second reference line being a line with continuous curvature, and the curvature of the first reference line being greater than the curvature of the second reference line.

6. The engine according to any one of claims 1 to 3, characterized in that, The first airflow channel is configured as a tangential airway; and / or The surface roughness of the wall of the first air intake is less than 0.

1.

7. A vehicle, characterized in that, Includes the engine as described in any one of claims 1 to 6.

Images