Air passage structure, engine and vehicle

Abstract

The utility model discloses an air passage structure, an engine and a vehicle. The air passage structure comprises at least one air passage body, at least one valve seat ring and at least one air passage connecting part. One end of the airway body is provided with an airway inlet, and the other end of the airway body is provided with an airway throat. The air valve seat ring is arranged at the air passage throat, the air passage connecting part is connected between the air passage throat and the air valve seat ring, and on the longitudinal section of the air passage connecting part, the contour line of the side wall of the joint of the air passage connecting part and the air valve seat ring forms a straight line; or on the longitudinal cross section of the air passage connecting part, the contour line of the side wall at the joint of the air passage connecting part and the valve seat ring forms an arc line. Therefore, the impact of the airflow on the valve seat ring is reduced, the phenomena of airflow speed reduction and airflow turbulence can be avoided, the tumble ratio of the airflow in the air passage structure is effectively increased while the flow coefficient of the air passage structure is met, and the air passage structure can be applied to an engine cylinder cover with the higher requirement for the tumble ratio.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an airway structure, an engine and a vehicle. Background Art

[0002] In the prior art, the intake airway structure of the vehicle engine is reasonably designed to achieve good fuel economy. However, engines with different requirements have different structural requirements for the airway structure, and the existing airway structure has a relatively low tumble ratio and cannot meet the requirements of special engine cylinder heads. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide an airway structure that can increase the tumble ratio in the engine.

[0004] The second objective of the present invention is to provide an engine, comprising the airway structure described above.

[0005] The third object of the present utility model is to provide a vehicle, comprising the airway structure or the engine described above.

[0006] According to the airway structure of the embodiment of the first aspect of the utility model, it includes: at least one airway body, at least one valve seat ring, and at least one airway connecting part, one end of the airway body has an airway inlet, and the other end of the airway body has an airway throat; the valve seat ring is arranged at the airway throat; the airway connecting part is connected between the airway throat and the valve seat ring, and the side wall contour line of the airway connecting part and the valve seat ring is formed as a straight line on the longitudinal cross-section of the airway connecting part; or the side wall contour line of the airway connecting part and the valve seat ring is formed as an arc line on the longitudinal cross-section of the airway connecting part.

[0007] According to the airway structure of the embodiment of the utility model, the side wall contour line of the airway connecting part is a straight line or an arc line, which can reduce the flow resistance, guide the airflow in the airway structure to the valve seat ring and enter the engine cylinder body, reduce the impact of the airflow on the valve seat ring, and avoid the phenomenon of airflow velocity reduction and airflow turbulence. Therefore, while meeting the flow coefficient of the airway structure, the tumble ratio of the airflow in the airway structure is effectively improved, so that the airway structure can be applied to the engine cylinder head with higher requirements for the tumble ratio.

[0008] In some embodiments, the radius of the arc is R, wherein R satisfies: 0≤R≤1mm.

[0009] In some embodiments, a cross-sectional area of ​​the airway connecting portion gradually increases along a direction from an end of the airway connecting portion connected to the airway throat toward an end of the airway connecting portion connected to the valve seat ring.

[0010] In some embodiments, in the longitudinal cross-section of the airway connecting portion, the angle between the two side wall contour lines of the airway connecting portion is α, and α satisfies: 80°≤α≤110°.

[0011] In some embodiments, the centerline of the airway body is formed as a straight line.

[0012] In some embodiments, the angle between the center line of the airway body and the horizontal plane is β, and β satisfies: 20°≤β≤40°.

[0013] In some embodiments, along the direction away from the airway entrance, the airway connecting portion extends obliquely in a direction deviating from the centerline of the airway body; along the direction from the airway entrance toward the airway throat, the surface of the airway body on the side corresponding to the airway connecting portion includes a ventral surface, and the ventral surface first extends in a direction away from the centerline of the airway body and then extends in a direction close to the centerline of the airway body.

[0014] In some embodiments, a surface of the airway body on one side corresponding to the airway connecting portion includes a first airway inlet surface, and a contour line of the first airway inlet surface relative to a center line of the airway body is a straight line.

[0015] In some embodiments, there are multiple airway bodies, and the multiple airway bodies are arranged side by side, and the side surfaces of the one ends of the multiple airway bodies are connected to each other to share the same airway entrance.

[0016] In some embodiments, along the direction away from the airway entrance, the airway connecting portion extends obliquely in a direction deviating from the center line of the airway body; the connection between two adjacent airway bodies has an avoidance portion, and the avoidance portion is located on the side of the airway body corresponding to the airway connecting portion; and / or the connection between two adjacent airway bodies has a protrusion, and the protrusion is located on the side of the airway body away from the airway connecting portion.

[0017] In some embodiments, the plane where the airway entrance is located is perpendicular to the horizontal plane.

[0018] In some embodiments, the cross-sectional area of ​​the airway inlet is S1, the cross-sectional area of ​​the valve seat ring is S2, and S1 and S2 satisfy: 1.1≤S1 / S2≤1.3.

[0019] The engine according to the embodiment of the second aspect of the utility model comprises the airway structure described in any one of the above embodiments.

[0020] The vehicle according to the third aspect of the present utility model comprises the airway structure or the engine described in any one of the above embodiments.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 Schematic diagram of the airway structure according to an embodiment of the utility model.

[0024] Figure 2 It is a right side schematic diagram of the airway structure according to an embodiment of the utility model.

[0025] Figure 3 yes Figure 2 Schematic diagram of the enlarged P region.

[0026] Figure 4 yes Figure 3 A schematic diagram of an embodiment of the M region.

[0027] Figure 5 yes Figure 3 A schematic diagram of another embodiment of the M region.

[0028] Figure 6 It is a cross-sectional schematic diagram of an engine cylinder head according to an embodiment of the utility model.

[0029] Reference numerals:

[0030] 1. Engine; 2. Airway structure;

[0031] 10. Airway body; 11. Airway entrance; 12. Airway throat; 13. Fish ventral surface; 14. First airway entrance surface;

[0032] 20. Valve seat ring;

[0033] 30. Airway connection. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 6The airway structure 2 according to the embodiment of the utility model is described, comprising: at least one airway body 10 , at least one valve seat ring 20 , and at least one airway connecting portion 30 .

[0035] Specifically, if Figure 1-Figure 5 As shown, one end of the airway body 10 has an airway inlet 11, and the other end of the airway body 10 has an airway throat 12. The valve seat ring 20 is arranged at the airway throat 12, and the airway connecting portion 30 is connected between the airway throat 12 and the valve seat ring 20. On the longitudinal section of the airway connecting portion 30, the side wall contour line of the connection between the airway connecting portion 30 and the valve seat ring 20 is formed as a straight line; or on the longitudinal section of the airway connecting portion 30, the side wall contour line of the connection between the airway connecting portion 30 and the valve seat ring 20 is formed as an arc line.

[0036] In the embodiment of the utility model, the contour line of the side wall of the airway connecting part 30 extends from the airway body 10 to the valve seat ring 20 along the center line of the airway connecting part 30, and the contour line is a straight line, and the end of the contour line adjacent to the valve seat ring 20 gradually extends in a direction away from the center line, that is, the airway connecting part 30 and the valve seat ring 20 adopt a non-rounded design and a straight transition, and the angle between the side wall contour line of the airway connecting part 30 and the side wall contour line of the valve seat ring 20 is an obtuse angle. Alternatively, the side wall contour line of the airway connecting part 30 along the axial direction is an arc line, that is, the rounded transition between the airway connecting part 30 and the valve seat ring 20. In this embodiment, it is preferred that the side wall contour line of the airway connecting part 30 is an approximate straight line or a straight line design, so that the airflow entering from the airway inlet 11 can quickly enter the cylinder body through the valve seat ring 20 along the airway connecting part 30, avoid turbulence in the airflow, and improve the tumble ratio.

[0037] According to the airway structure 2 of the embodiment of the utility model, the side wall contour line of the airway connecting part 30 is a straight line or an arc line, which can reduce the flow resistance, guide the airflow in the airway structure 2 to the valve seat ring 20 and enter the cylinder body of the engine 1, reduce the impact of the airflow on the valve seat ring 20, and avoid the phenomenon of airflow velocity reduction and airflow turbulence. Therefore, while meeting the flow coefficient of the airway structure 2, the tumble ratio of the airflow in the airway structure 2 is effectively improved, so that the airway structure 2 can be applied to the cylinder head of the engine 1 with higher requirements for the tumble ratio.

[0038] In some embodiments, Figure 4 and Figure 5 As shown, the radius of the arc is R, where R satisfies: 0≤R≤1mm. For example, R=0mm, that is, the side wall at the connection between the airway connecting portion 30 and the valve seat ring 20 transitions in a straight line. When R>0, the side wall at the connection between the airway connecting portion 30 and the valve seat ring 20 transitions in an arc. Thus, the tumble ratio of the airway structure 2 can be increased, and the airway structure 2 can be used in an engine 1 including a GDI cylinder head that has a high requirement for the tumble ratio.

[0039] In some embodiments, Figure 2 As shown, the cross-sectional area of ​​the airway connecting part 30 gradually increases along the direction from the end of the airway connecting part 30 connected to the airway throat 12 toward the end of the airway connecting part 30 connected to the valve seat ring 20. That is, the airflow flows into the airway structure 2 from the airway inlet 11 of the airway body 10, flows to the airway connecting part 30 through the airway throat 12, and then flows from the valve seat ring 20 to the inside of the cylinder body. Along the flow direction of the airflow inside the airway structure 2, the cross-sectional area of ​​the airway connecting part 30 gradually increases, the cross-sectional area of ​​one end of the airway body 10 corresponding to the airway throat 12 gradually decreases, the airway flow resistance increases, the airway flow coefficient decreases, the airflow accelerates when flowing through the airflow throat, and when flowing through the airway connecting part 30, the cross-sectional area of ​​the airway connecting part 30 gradually increases, and the side wall contour line of the airway connecting part 30 is a straight line or an approximate straight line, which can reduce the flow resistance of the airflow, increase the airway flow coefficient, and meet the intake volume while significantly increasing the tumble ratio of the airway structure 2.

[0040] In some embodiments, Figure 3 As shown, in the longitudinal section of the airway connecting portion 30, the angle between the two side wall contour lines of the airway connecting portion 30 is α, and α satisfies: 80°≤α≤110°. That is, the angle between the two side wall contour lines of the airway connecting portion 30 opposite to each other in the direction perpendicular to the center line is 80°-110°, and α=90° is preferred.

[0041] That is, the angle between the side wall contour line and the center line is 45°. If the angle between the two side wall contour lines is less than 80°, the side wall contour line is tilted at a smaller angle than the center line, the airway flow resistance is larger, the flow coefficient is reduced, and the tumble ratio of the airway is relatively small and cannot meet the requirements of a specific cylinder head; if the angle between the two side wall contour lines is greater than 110°, the side wall contour line is tilted at a larger angle than the center line, the opening of the airway connection part 30 is larger, and the airflow cannot flow along the direction of the side wall contour line of the airway connection part 30 when flowing through the airway connection part 30, and turbulence is likely to occur, affecting the tumble ratio of the airway, and the size of the tumble ratio formed by the airway structure 2 is uncertain.

[0042] Thus, the angle between the two side wall contour lines is defined so that the airway structure 2 can have a higher tumble ratio, so that the engine 1 having the airway structure 2 has good fuel economy. The tumble ratio refers to the ratio of the cross-sectional efficiency of the airway connecting portion 30 to the minimum cross-sectional area of ​​the airway connecting portion 30.

[0043] In some embodiments, the center line of the airway body 10 is formed as a straight line. The center line of the airway body 10 is a straight line, which can effectively reduce the flow resistance of the airflow in the airway body 10 when the airflow flows through the airway body 10, increase the flow coefficient, ensure the intake volume, and further improve the tumble ratio of the airway structure 2.

[0044] Optionally, combined Figure 2 , the angle between the center line of the airway body 10 and the horizontal plane is β, β satisfies: 20°≤β≤40°. After the airway structure 2 is installed, the angle between the center line of the airway structure and the horizontal plane is 20°-40°, where the horizontal plane can refer to the plane where the vertical airway inlet 11 is located. The center line of the airway body 10 can be an arc.

[0045] In some embodiments, Figure 3 As shown, along the direction away from the airway inlet 11, the airway connection part 30 extends obliquely in the direction deviating from the center line of the airway body 10. That is, the airway connection part 30 is provided at one end of the airway body 10 where the airway throat 12 is provided, the center line of the airway connection part 30 forms an angle with the center line of the airway body 10, and the airway connection part 30 is obliquely provided toward the end of the airway body 10 away from the airway inlet 11. Along the direction from the airway inlet 11 toward the airway throat 12, the surface of the side of the airway body 10 where the corresponding airway connection part 30 is located includes a ventral surface 13, and the ventral surface 13 first extends in the direction away from the center line of the airway body 10, and then extends in the direction close to the center line of the airway body 10.

[0046] The airway body 10 has a first contour line and a second contour line, the first contour line is the upper part of the airway body 10 extending in the extension direction of the center line, the second contour line is the lower part of the airway body 10 extending in the extension direction of the center line, the lower part of the airway body 10 is formed with a ventral surface 13, and the contour line of the ventral surface 13 along the airway body 10 from the airway entrance 11 to the airway throat 12 is constructed as a second contour line, and the second contour line first gradually tilts away from the first contour line in the direction perpendicular to the center line and then tilts toward the first contour line. That is, the radius of curvature of the second contour line first increases and then decreases.

[0047] Therefore, a ventral surface 13 is provided at the lower part of the airway body 10, that is, the airway body 10 is a ventral structure. When the airflow enters the airway body 10, it is guided to the upper part of the airway structure 2 through the ventral surface 13 and enters the airway connecting part 30 from the airway throat 12, thereby increasing the flow velocity of the airflow in the airway structure 2 and effectively improving the tumble ratio of the airway structure 2.

[0048] In some embodiments, Figure 2As shown, the surface of one side of the airway body 10 corresponding to the airway connecting portion 30 includes a first airway inlet surface 14, and the contour line of the first airway inlet surface 14 relative to the center line of the airway body 10 is a straight line. Therefore, the contour line of the airway body 10 corresponding to the first airway inlet surface 14 is a straight line, that is, the cross-sectional area of ​​the airway body 10 corresponding to the part of the airway body 10 where the first airway inlet surface 14 is located remains unchanged, which can reduce the resistance of the airflow into the airway structure 2, and facilitate the airflow to be directed to different airway bodies 10.

[0049] Alternatively, if Figure 1 As shown, there are multiple airway bodies 10, and the multiple airway bodies 10 are arranged side by side, and the sides of one end of the multiple airway bodies 10 are connected to each other to share the same airway inlet 11. That is, the airway structure 2 has an airway inlet 11 and two airway throats 12. After the airflow enters the airway structure 2 through the airway inlet 11, it flows out from the two airway throats 12 respectively, thereby increasing the flow velocity of the airflow inside the airway structure 2.

[0050] In some embodiments, Figure 1 and Figure 2 As shown, along the direction away from the airway inlet 11, the airway connection part 30 extends obliquely in the direction away from the center line of the airway body 10, and one end of the airway body 10 away from the airway connection part 30 deviates from the center line of the airway body 10 and tilts toward the airway connection part 30, and the center line of the airway body 10 forms an angle with the center line of the airway connection part 30. The connection between two adjacent airway bodies 10 has a avoidance part, and the avoidance part is located on the side where the corresponding airway connection part 30 of the airway body 10 is located. The airway inlet 11 includes an upper part of the airway inlet 11 and a lower part of the airway inlet 11. The avoidance part is arranged on one side of the upper part of the airway inlet 11 for avoiding structures such as fuel injectors. Or the connection between two adjacent airway bodies 10 has a protrusion, and the protrusion is located on the side of the airway body 10 away from the airway connection part 30, so that the cross-sectional area of ​​the airway inlet 11 can be increased, thereby increasing the air intake. In this embodiment, the avoidance part and the protrusion are arranged at the same time.

[0051] In some embodiments, the plane where the airway inlet 11 is located is perpendicular to the horizontal plane. For example, after the airway structure 2 is installed on the cylinder head of the engine 1, the plane where the airway inlet 11 is located is a vertical plane, which facilitates the connection between the airway structure 2 and the external structure, increases the sealing of the connection part, and simplifies the connection structure.

[0052] In some embodiments, the cross-sectional area of ​​the airway inlet 11 is S1, and the cross-sectional area of ​​the valve seat ring 20 is S2, and S1 and S2 satisfy: 1.1≤S1 / S2≤1.3. If the ratio of the cross-sectional area of ​​the airway inlet 11 to the valve seat ring 20 is less than 1.1 or 1.3, the tumble ratio of the airflow structure will be reduced. In this embodiment, S1 / S2=1.2, which reduces the flow resistance while enhancing the tumble ratio of the airway structure 2, optimizes the combustion efficiency, and reduces the knock tendency of the engine 1 provided with the airway structure 2.

[0053] The engine 1 according to the embodiment of the second aspect of the utility model comprises the airway structure 2 of any one of the above embodiments.

[0054] According to the engine 1 of the utility model, combined Figure 6 The engine 1 includes a cylinder head and a cylinder block, and an airway structure 2 is arranged in the cylinder head. The cylinder head includes multiple airway structures 2. By limiting the design of the connection between the airway body 10 and the airway connecting part 30 included in the airway structure 2, the airflow passes through the airway structure 2 and enters the cylinder block to mix with other fluids. The connection between the airway body 10 and the airway connecting part 30 adopts a straight line transition to avoid the design of chamfered corners. Combined with the approximate straight line design of the center line of the airway body 10, the tumble ratio of the airway can be greatly improved while ensuring that the airway flow coefficient remains unchanged, thereby improving the combustion efficiency of the engine 1 and ensuring the power output of the engine 1.

[0055] The vehicle according to the third aspect of the present utility model comprises the airway structure 2 or the engine 1 of any one of the above embodiments.

[0056] According to the vehicle of the embodiment of the utility model, the tumble ratio of the cylinder head of the engine 1 can be improved by optimizing the airway structure 2 to make the performance of the engine 1 stronger, improve the fuel economy of the vehicle, and improve the user experience.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An airway structure, characterized in that: include: At least one airway body, one end of the airway body having an airway inlet, and the other end of the airway body having an airway throat; At least one valve seat ring, wherein the valve seat ring is arranged at the throat of the airway; at least one airway connection portion, the airway connection portion being connected between the airway throat and the valve seat ring, On the longitudinal cross section of the airway connecting portion, a side wall contour line at a connection between the airway connecting portion and the valve seat ring is formed as an arc line; In the longitudinal cross section of the airway connecting portion, the angle between the two side wall contour lines of the airway connecting portion is α, and α satisfies: 80°≤α≤110°.

2. The airway structure according to claim 1, characterized in that: The radius of the arc is R, wherein R satisfies: 0≤R≤1mm.

3. The airway structure according to claim 1, characterized in that: The cross-sectional area of ​​the airway connecting portion gradually increases along a direction from an end of the airway connecting portion connected to the airway throat toward an end of the airway connecting portion connected to the valve seat ring.

4. The airway structure according to claim 1, characterized in that: The centerline of the airway body is formed as a straight line.

5. The airway structure according to claim 1, characterized in that: The included angle between the center line of the airway body and the horizontal plane is β, and β satisfies: 20°≤β≤40°.

6. The airway structure according to claim 1, characterized in that: In a direction away from the airway entrance, the airway connecting portion extends obliquely in a direction deviating from the center line of the airway body; Along the direction from the airway entrance toward the airway throat, the surface of the airway body on one side corresponding to the airway connecting portion includes a ventral surface, which first extends in a direction away from the center line of the airway body and then extends in a direction close to the center line of the airway body.

7. The airway structure according to claim 6, characterized in that: The surface of the airway body on one side corresponding to the airway connecting portion includes a first airway inlet surface, and a contour line of the first airway inlet surface relative to the center line of the airway body is a straight line.

8. The airway structure according to claim 1, characterized in that: There are a plurality of airway bodies, and the plurality of airway bodies are arranged side by side. The side surfaces of the one ends of the plurality of airway bodies are connected to each other to share the same airway inlet.

9. The airway structure according to claim 8, characterized in that: In a direction away from the airway entrance, the airway connecting portion extends obliquely in a direction deviating from the center line of the airway body; A connection between two adjacent airway bodies has an avoidance portion, and the avoidance portion is located on a side of the airway body corresponding to the airway connection portion; and / or A protrusion is provided at the connection between two adjacent airway bodies, and the protrusion is located on a side of the airway body away from the airway connection portion.

10. The airway structure according to claim 1, characterized in that: The plane where the airway entrance is located is perpendicular to the horizontal plane.

11. The airway structure according to any one of claims 1 to 10, characterized in that: The cross-sectional area of ​​the airway inlet is S1, the cross-sectional area of ​​the valve seat ring is S2, and S1 and S2 satisfy: 1.1≤S1 / S2≤1.

3.

12. An engine, characterized in that: The invention comprises the airway structure according to any one of claims 1 to 11.

13. A vehicle, characterized in that: The invention comprises the airway structure described in any one of claims 1 to 11 or the engine described in claim 12.

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