Air inlet connecting pipe, engine and vehicle

Abstract

The utility model discloses an air inlet connecting pipe, and relates to the technical field of engines, the air inlet connecting pipe comprises a first pipe body and a second pipe body, the first pipe body is a bent pipe, an inlet end is formed at one end of the first pipe body, the inlet end is open towards a first direction, the other end of the first pipe body is connected with the second pipe body, and the second pipe body extends along a second direction; an outlet end connected with a supercharger is formed at the end, away from the first pipe body, of the second pipe body, the second direction is the direction of the center line of the outlet end, and the first direction and the second direction are orthogonal. The first connecting pipe is connected to the outer wall, away from the bent position of the first pipe body, of the first pipe body, EGR gas is introduced into the first connecting pipe, the second connecting pipe is connected to the inner wall, close to the bent position of the first pipe body, of the second pipe body, and bent gas is introduced into the second connecting pipe. According to the gas inlet connecting pipe provided by the embodiment of the invention, the gas mixing efficiency can be improved, and the gas inlet requirement of the supercharger can be met.

Description

Technical Field

[0001] This application relates to the field of engines, and more particularly to an intake manifold, an engine, and a vehicle. Background Technology

[0002] In related technologies, in the low-pressure exhaust gas recirculation (EGR) system of an engine, EGR gas is typically introduced to the front end of the compressor, and needs to be mixed with fresh air and bypass gas before entering the turbocharger compressor. However, if the EGR gas, fresh air, and bypass gas cannot achieve sufficient and uniform mixing before entering the compressor impeller, it will cause an imbalance in the airflow distribution inside the compressor, leading to a decrease in its performance and consequently affecting the overall performance of the engine. Therefore, how to improve the mixing efficiency of EGR gas, fresh air, and bypass gas is a technical problem. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide an intake manifold that can improve the gas mixing efficiency and meet the intake requirements of the turbocharger.

[0004] This application also proposes an engine having the aforementioned intake manifold.

[0005] This application also proposes a vehicle having the aforementioned engine.

[0006] According to an embodiment of this application, the intake pipe includes: a first pipe body and a second pipe body, the first pipe body being a bend, one end of the first pipe body having an inlet end that is open in a first direction, the other end of the first pipe body being connected to the second pipe body, the second pipe body extending along a second direction, and the end of the second pipe body away from the first pipe body having an outlet end connected to a turbocharger, the second direction being the direction of the centerline of the outlet end, and the first direction being orthogonal to the second direction; a first connecting pipe and a second connecting pipe, the first connecting pipe being connected to the outer wall of the first pipe body away from the bend of the first pipe body, the first connecting pipe being adapted to introduce EGR gas, and the second connecting pipe being connected to the inner wall of the second pipe body near the bend of the first pipe body, the second connecting pipe being adapted to introduce curved gas.

[0007] According to the intake manifold of this application embodiment, the intake manifold is constructed as a bend in the first pipe body, which increases the airflow velocity when fresh air flows through the first pipe body, making the mixing of fresh air and EGR gas more thorough. The mixed gas forms a pressure gradient due to the increased pressure, so when the mixed gas flows through the second pipe body, it can be fully and uniformly mixed with the bend gas through the pressure difference, thereby making the gas mixing efficiency higher and improving the performance of the compressor, and thus improving the performance of the engine.

[0008] In some embodiments of this application, the first pipe body has a corner portion connected to the second pipe body, and the first connecting pipe is connected to the outer wall of the first pipe body away from the corner portion along the second direction.

[0009] In some embodiments of this application, a first connecting hole is formed at the junction of the first connecting pipe and the first pipe body, and the angle between the center line of the first connecting hole and the tangent of the extension direction of the first pipe body is α and satisfies: 0 < α ≤ 90°.

[0010] In some embodiments of this application, a second connecting hole is formed at the junction of the second connecting pipe and the second pipe body, and the distance between the center line of the second connecting hole and the corner portion along the second direction is L and satisfies: 1cm≤L≤3cm.

[0011] In some embodiments of this application, along the radial section of the second tube, the angle between the centerline of the second connecting hole and the first direction is β and satisfies: 0≤β≤60°.

[0012] In some embodiments of this application, the distance between the center point of the first connecting hole and the center point of the outlet end along the second direction is d1 and satisfies: d1≥10cm, and the distance between the center point of the first connecting hole and the center point of the second connecting hole along the second direction is d2 and satisfies: d2≥5cm.

[0013] In some embodiments of this application, the dimension of the second tube along the second direction is H and satisfies: H≥5cm.

[0014] In some embodiments of this application, a third connecting hole is formed at the junction of the first pipe body and the second pipe body, and the angle between the center line of the third connecting hole and the center line of the inlet end is γ and satisfies: 60°≤γ≤90°.

[0015] The engine of an embodiment of this application is described below.

[0016] The engine according to the embodiments of this application is provided with a turbocharger and an intake manifold as described in the above embodiments. The intake manifold can be connected to the turbocharger. Since the engine of the embodiments of this application is provided with a turbocharger and an intake manifold as described in the above embodiments, the intake manifold of this engine increases the airflow velocity when the fresh air flows through the first pipe body by constructing it as a bend, so that the fresh air and EGR gas are mixed more thoroughly. The mixed gas forms a pressure gradient due to the increase in pressure. Therefore, when the mixed gas flows through the second pipe body, it can be fully and uniformly mixed with the bend gas through the pressure difference, thereby improving the gas mixing efficiency and the performance of the turbocharger, and thus improving the performance of the engine.

[0017] The vehicle of an embodiment of this application is described below.

[0018] The vehicle according to the embodiments of this application is equipped with the engine of the above embodiments. Since the vehicle according to the embodiments of this application is equipped with the engine of the above embodiments, the engine of the vehicle has an intake manifold. The intake manifold is constructed by making the first pipe body into a bend, so that the airflow velocity of fresh air increases when it flows through the first pipe body, and the fresh air and EGR gas are mixed more thoroughly. Due to the increase in pressure, the mixed gas forms a pressure gradient. Therefore, when the mixed gas flows through the second pipe body, it can be fully and uniformly mixed with the bend gas through the pressure difference, thereby making the gas mixing efficiency higher, improving the performance of the turbocharger, and thus improving the performance of the engine. It can also reduce the generation of noise and improve the NVH performance of the vehicle.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the intake pipe structure according to an embodiment of this application;

[0022] Figure 2 yes Figure 1 Another structural diagram of the central air intake manifold;

[0023] Figure 3 yes Figure 2 A top-down view;

[0024] Figure 4 yes Figure 3 Schematic diagram of the cross section of AA;

[0025] Figure 5 yes Figure 1 A schematic diagram of the cross-section of the second pipe body and the second connecting pipe of the central air intake pipe;

[0026] Figure 6 yes Figure 1 A schematic diagram of the cross-section of the first tube.

[0027] Figure label:

[0028] 10. Air intake pipe;

[0029] 11. First pipe body; 111. Inlet end; 112. Corner section;

[0030] 113. Third connecting hole; 114. First mounting flange;

[0031] 12. Second pipe body; 121. Outlet end; 122. Mounting section; 123. Second mounting flange;

[0032] 13. First connecting pipe; 131. First communicating hole;

[0033] 14. Second connecting pipe; 141. Second connecting hole; 142. Limiting rib. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] The following is for reference. Figures 1-5 The air intake pipe 10 according to an embodiment of the present application is described. The air intake pipe 10 includes a first pipe body 11, a second pipe body 12, a first connecting pipe 13, and a second connecting pipe 14.

[0036] The first tube 11 is a bend, with an inlet end 111 formed at one end, which is open in a first direction. The other end of the first tube 11 is connected to the second tube 12, which extends along a second direction. The end of the second tube 12 away from the first tube 11 has an outlet end 121 connected to the booster. The second direction is the direction of the centerline of the outlet end 121, and the first and second directions are orthogonal. A first connecting pipe 13 is connected to the outer wall of the first tube 11 away from the bend, and is suitable for introducing EGR gas. A second connecting pipe 14 is connected to the inner wall near the bend of the first tube 11, and is suitable for introducing curved gas.

[0037] Currently, in the low-pressure exhaust gas recirculation (EGR) system of an engine, EGR gas is typically introduced to the front end of the compressor, and it needs to be mixed with fresh air and bypass gas before entering the turbocharger compressor. However, if the EGR gas, fresh air, and bypass gas cannot achieve sufficient and uniform mixing before entering the compressor impeller, it will cause an imbalance in the airflow distribution inside the compressor, leading to a decrease in its performance and consequently affecting the overall performance of the engine. Therefore, improving the mixing efficiency of EGR gas, fresh air, and bypass gas is a technical problem.

[0038] In response, this application proposes an intake pipe 10, which can improve the gas mixing efficiency and meet the intake requirements of the turbocharger.

[0039] Specifically, the intake pipe 10 includes a first pipe body 11 and a second pipe body 12. The first pipe body 11 is a bent pipe, and one end of the first pipe body 11 forms an inlet end 111, which can be used to introduce fresh air. The inlet end 111 is open in a first direction, and a first mounting flange 114 can be provided at the inlet end 111 to fix it to the pipeline. The other end of the first pipe body 11 can be connected to the second pipe body 12. Optionally, the first pipe body 11 and the second pipe body 12 can be fixed by welding or the first pipe body 11 and the second pipe body 12 can be constructed as an integral part. The second pipe body 12 can extend in a second direction, and the end of the second pipe body 12 away from the first pipe body 11 can form an outlet end 121. The outlet end 121 can be connected to the turbocharger, and a second mounting flange 123 can be provided at the outlet end 121. The second mounting flange 123 can be used for installation. Specifically, the outlet end 121 is connected to the compressor inlet in the turbocharger. The second direction is the direction of the centerline of the outlet end 121, and the first direction is orthogonal to the second direction.

[0040] Furthermore, such as Figure 1 , Figure 2 and Figure 3As shown, the intake pipe 10 also includes a first connecting pipe 13 and a second connecting pipe 14. The first connecting pipe 13 is connected to the first pipe body 11 and is disposed near the inlet end 111. The first connecting pipe 13 can be connected to the outer wall of the first pipe body 11 away from its bend. The second connecting pipe 14 is connected to the second pipe body 12 and is disposed near the outlet end 121. The second connecting pipe 14 can be connected to the inner wall of the second pipe body 12 near the bend of the first pipe body 11. In some embodiments, the second pipe body 12 may have a mounting portion 122, which can communicate with the interior of the second pipe body 12. The second connecting pipe 14 can be connected to the mounting portion 122, and the outer wall of the second connecting pipe 14 may have a limiting rib 142 that abuts against the mounting portion 122. It should be noted that the first connecting pipe 13 is closer to the inlet end 111 than the second connecting pipe 14, and the second connecting pipe 14 is closer to the outlet end 121 than the first connecting pipe 13. The first connecting pipe 13 can be used to introduce EGR gas, and the second connecting pipe 14 can be used to introduce curved gas. Since the pressure of EGR gas is higher than that of fresh air, after the EGR gas enters the curved pipe through the first connecting pipe 13, the increased airflow velocity after entering the curved pipe enhances the gas convection and diffusion effect, allowing the EGR gas to mix with the fresh air and form a pressure gradient. Due to the positional distribution of the first connecting pipe 13 and the second connecting pipe 14, the mixed gas will not affect the pressure at the second connecting pipe 14. The mixed gas is further mixed through the pressure difference in the second pipe body 12, making the gas mixing more thorough and improving the mixing efficiency. After the gas is subsequently input to the compressor, it can further improve the compressor performance, reduce noise generation, and improve the vehicle's NVH performance.

[0041] It should be noted that the pressure difference between the EGR gas and air at the high pressure and the bypass gas at the low pressure gradually decreases, the airflow velocity tends to be consistent, and the pressure distribution gradually becomes more balanced, thereby ensuring that the mixed gas can enter the compressor normally.

[0042] In short, the intake pipe 10 of this application embodiment includes a first pipe body 11 and a second pipe body 12 connected to each other. The first pipe body 11 is constructed as a bend. A first connecting pipe 13 is connected to the first pipe body 11 and is adapted to introduce EGR gas into the first pipe body 11. A second connecting pipe 14 is connected to the second pipe body 12 and is adapted to introduce curved gas into the second pipe body 12. By constructing the first pipe body 11 as a bend, the airflow velocity of fresh air increases when it flows through the first pipe body 11, making the mixing of fresh air and EGR gas more thorough. Due to the increase in pressure, the mixed gas forms a pressure gradient. Therefore, when the mixed gas flows through the second pipe body 12, it can be fully and uniformly mixed with the curved gas through the pressure difference, thereby improving the gas mixing efficiency and the performance of the compressor, and thus improving the performance of the engine.

[0043] like Figure 1 and Figure 4 As shown, in some embodiments of this application, the first tube 11 has a corner portion 112 connected to the second tube 12. The corner portion 112 can be the bending point where the first tube 11 bends in the second direction. The corner portion 112 can be connected to the second tube 12, and the first connecting pipe 13 can be connected to the outer wall of the first tube 11. The outer wall is the outer wall away from the corner portion 112 along the second direction. By connecting the first connecting pipe 13 at the above position, the airflow velocity of the fresh air in the first tube 11 on the outside can be increased, and the fresh air generates convection and diffusion effects, making it easier for the fresh air to mix with the EGR gas in the first connecting pipe 13, thereby improving the mixing efficiency of air and EGR gas.

[0044] like Figure 4 As shown, in some embodiments of this application, a first connecting hole 131 is formed at the junction of the first connecting pipe 13 and the first pipe body 11. The EGR gas in the first connecting pipe 13 can flow into the first pipe body 11 through the first connecting hole 131. The angle between the center line of the first connecting hole 131 and the tangent of the extension direction of the first pipe body 11 is α, and α satisfies the relationship: 0 < α ≤ 90°. It can be understood that when α equals 90 degrees, the first connecting pipe 13 is perpendicular to the first pipe body 11. At this time, when the EGR gas in the first connecting pipe 13 enters the first pipe body 11, there will be no backflow problem, avoiding the EGR gas from seriously affecting the air flow and ensuring the air flow rate. When α is between 0 degrees and 90 degrees, the EGR gas in the first connecting pipe 13 can flow with the air, so that the EGR gas can be fully mixed with the air. Therefore, setting the angle between the center line of the first connecting hole 131 and the extension direction of the first pipe body 11 within the above range can ensure the normal input of EGR gas and make the EGR gas and fresh air mix more evenly.

[0045] like Figure 4As shown, in some embodiments of this application, a second connecting hole 141 is formed at the junction of the second connecting pipe 14 and the second pipe body 12. The gas in the second connecting pipe 14 can flow to the second pipe body 12 through the second connecting hole 141. The distance between the center line of the second connecting hole 141 and the corner portion 112 along the second direction is L, which satisfies the relationship: 1cm≤L≤3cm. It can be understood that the distance between the center line of the second connecting hole 141 and the corner portion 112 along the second direction can be any value between 1cm and 3cm. For example, the distance between the center line of the second connecting hole 141 and the corner portion 112 along the second direction can be, but is not limited to, 1cm, 1.5cm, 2cm, 2.5cm, 3cm, etc. This setting can ensure that the idle crankcase pressure is between -0.1 and 0.05kPa. The operator can adjust the distance between the center line of the second connecting hole 141 and the corner portion 112 along the second direction within the above range to change the idle crankcase pressure so that the pressure in the idle crankcase meets the requirements and standards.

[0046] like Figure 5 As shown, in some embodiments of this application, along the radial cross section of the second tube 12, the angle between the centerline of the second connecting hole 141 and the first direction is β, satisfying the relationship: 0≤β≤60°. It can be understood that the angle between the centerline of the second connecting hole 141 and the first direction can be any value between 0 and 60 degrees. For example, the angle between the centerline of the second connecting hole 141 and the first direction can be, but is not limited to, 0, 20°, 40°, 60°, etc. This setting can make the crankshaft gas mixing more uniform. It should be noted that the high-pressure gas after the EGR gas and air are mixed can flow through the first tube 11 to the second tube 12. Since the flow velocity is fast on the outside of the first tube 11, the pressure on the side of the second tube 12 near the inlet end 111 is small, that is, the pressure gradient is large and the negative pressure is greater. By setting the second connecting pipe 14 at the above position, the crankshaft gas can be further mixed with the mixed high-pressure gas after entering the second tube 12, thereby improving the gas mixing efficiency.

[0047] like Figure 4As shown, in some embodiments of this application, the distance d1 between the center point of the first connecting hole 131 and the center point of the outlet end 121 along the second direction satisfies the relationship: d1≥10cm. It can be understood that the distance between the center point of the first connecting hole 131 and the center point of the outlet end 121 along the second direction is greater than or equal to 10cm. The distance d2 between the center point of the first connecting hole 131 and the center point of the second connecting hole 141 along the second direction satisfies the relationship: d2≥5cm. It can be understood that the distance between the center point of the first connecting hole 131 and the center point of the second connecting hole 141 along the second direction is greater than or equal to 5cm. By setting the distances along the second direction between the center point of the first connecting hole 131 and the center point of the outlet end 121 and between the center point of the first connecting hole 131 and the center point of the second connecting hole 141, the mutual influence between the EGR gas in the first connecting pipe 13 and the tortuous gas in the second connecting pipe 14 can be avoided, making the EGR gas and fresh air mix more evenly. Furthermore, after the tortuous gas enters the second pipe body 12, it can eliminate the pressure gradient generated by the mixed gas flowing through the bend before entering the turbocharger, ensuring that the intake efficiency of the turbocharger is not affected.

[0048] like Figure 4 As shown, in some embodiments of this application, the dimension of the second tube 12 along the second direction is H, which satisfies the relationship: H≥5cm. It can be understood that the dimension of the second tube 12 along the second direction is greater than or equal to 5cm. By setting the dimension of the second tube 12 along the second direction within the above range, it can be ensured that the pressure distribution is uniform when the gas enters the booster, so that the pressure gradient generated by the gas flowing through the bend before entering the booster can be eliminated, thereby reducing the impact on the intake efficiency of the booster.

[0049] like Figure 4 and Figure 6As shown, in some embodiments of this application, a third connecting hole 113 is formed at the junction of the first tube 11 and the second tube 12. Gas in the first tube 11 can enter the second tube 12 through the third connecting hole 113. The angle between the center line of the third connecting hole 113 and the center line of the inlet end 111 is γ, which satisfies the relationship: 60°≤γ≤90°. It can be understood that the angle between the center line of the third connecting hole 113 and the center line of the inlet end 111 can be any value between 60° and 90°. For example, the angle between the center line of the third connecting hole 113 and the center line of the inlet end 111 can be, but is not limited to, 60°, 70°, 80°, 90°, etc. This setting can generate a pressure gradient when the gas flows in the first tube 11, and the magnitude of the negative pressure in the first tube 11 can be further changed by changing the magnitude of γ. This allows the fresh air and EGR gas to be mixed evenly, and the pressure gradient can also be used to fully and evenly mix the mixed gas with the circulating gas, thereby making the gas mixing efficiency higher.

[0050] The engine of an embodiment of this application is described below.

[0051] The engine according to the embodiment of this application is provided with a turbocharger and the intake pipe 10 of the above embodiment. The intake pipe 10 can be connected to the turbocharger. Since the engine of the embodiment of this application is provided with a turbocharger and the intake pipe 10 of the above embodiment, the intake pipe 10 of the engine is constructed with the first pipe 11 as a bend, so that the airflow velocity of fresh air increases when it flows through the first pipe 11, and the fresh air and EGR gas are mixed more fully. The mixed gas forms a pressure gradient due to the increase in pressure. Therefore, when the mixed gas flows through the second pipe 12, it can be fully and uniformly mixed with the bend gas through the pressure difference, so as to improve the gas mixing efficiency and improve the performance of the turbocharger, thereby improving the performance of the engine.

[0052] The vehicle of an embodiment of this application is described below.

[0053] The vehicle according to the embodiments of this application is equipped with the engine of the above embodiments. Since the vehicle according to the embodiments of this application is equipped with the engine of the above embodiments, the engine of the vehicle has an intake manifold 10. The intake manifold 10 is constructed by making the first pipe 11 into a bend, so that the airflow velocity of fresh air increases when it flows through the first pipe 11, and the fresh air and EGR gas are mixed more fully. The mixed gas forms a pressure gradient due to the increase in pressure. Therefore, when the mixed gas flows through the second pipe 12, it can be fully and uniformly mixed with the bend gas through the pressure difference, so as to improve the gas mixing efficiency, improve the performance of the turbocharger, and thus improve the performance of the engine. It can also reduce the generation of noise and improve the NVH performance of the vehicle.

[0054] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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.

[0055] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0056] In the description of this application, "multiple" means two or more.

[0057] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0058] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An air intake adapter, comprising: include: The first pipe (11) and the second pipe (12) are a bend in the pipe. One end of the first pipe (11) is formed with an inlet end (111) which is open in a first direction. The other end of the first pipe (11) is connected to the second pipe (12). The second pipe (12) extends in a second direction. The end of the second pipe (12) away from the first pipe (11) is formed with an outlet end (121) connected to the booster. The second direction is the direction of the center line of the outlet end (121). The first direction is orthogonal to the second direction. A first connecting pipe (13) and a second connecting pipe (14), wherein the first connecting pipe (13) is connected to the outer wall of the first pipe body (11) away from the bend of the first pipe body (11), and the first connecting pipe (13) is adapted to introduce EGR gas, and the second connecting pipe (14) is connected to the inner wall of the second pipe body (12) near the bend of the first pipe body (11), and the second connecting pipe (14) is adapted to introduce curved gas.

2. The air intake adapter of claim 1, wherein, The first tube (11) has a corner portion (112) connected to the second tube (12), and the first connecting tube (13) is connected to the outer wall of the first tube (11) away from the corner portion (112) along the second direction.

3. The air intake adapter of claim 2, wherein, A first connecting hole (131) is formed at the junction of the first connecting pipe (13) and the first pipe body (11). The angle between the center line of the first connecting hole (131) and the tangent of the extension direction of the first pipe body (11) is α and satisfies: 0<α≤90°.

4. The air intake pipe according to claim 2, characterized in that, A second connecting hole (141) is formed at the junction of the second connecting pipe (14) and the second pipe body (12). The distance between the center line of the second connecting hole (141) and the corner part (112) along the second direction is L and satisfies: 1cm≤L≤3cm.

5. The air intake adapter of claim 4, wherein, The centerline of the second connecting hole (141) makes an angle β with the first direction and satisfies: 0≤β≤60°.

6. The air intake adapter of claim 3, wherein, The distance between the center point of the first connecting hole (131) and the center point of the outlet end (121) along the second direction is d1 and satisfies: d1≥10cm. The distance between the center point of the first connecting hole (131) and the center point of the second connecting hole (141) along the second direction is d2 and satisfies: d2≥5cm.

7. The air intake adapter of claim 3, wherein, The second tube (12) has a dimension of H along the second direction and satisfies: H≥5cm.

8. The air intake adapter of claim 1, wherein, A third connecting hole (113) is formed at the junction of the first tube (11) and the second tube (12). The angle between the center line of the third connecting hole (113) and the center line of the inlet end (111) is γ and satisfies: 60°≤γ≤90°.

9. An engine characterized by, It includes a turbocharger and an intake manifold as described in any one of claims 1-8, the intake manifold being connected to the turbocharger.

10. A vehicle characterized by comprising: Including the engine as described in claim 9.

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