Air inlet system and vertical shaft engine

Abstract

The utility model provides an intake system and vertical axis engine, intake system includes connecting seat, two intake pipe and two cylinder head body, two intake pipe are connected with connecting seat respectively, intake pipe is communicated with intake hole, two intake pipe respectively smooth bend extension from connecting seat front side towards connecting seat both sides, and the cylinder head body is connected with the connecting seat. The inner wall of the air inlet pipe is in smooth transition. The cylinder head body is provided with an air inlet channel, a first connecting hole and a combustion chamber which are sequentially communicated, the inner wall of the first connecting hole is an outwards-protruding arc face, and the inner diameter of the first connecting hole is gradually increased in the direction towards the combustion chamber. And the filtered air flows into the air inlet channel of the cylinder head body along the smooth inner wall of the air inlet pipe, so that the flowing resistance of the air in the air inlet pipe is reduced. In addition, due to the fact that the first connecting hole with the cambered inner wall is formed in the connecting position of the air inlet channel and the combustion chamber, resistance borne by air in the flowing process is further reduced, the air inlet efficiency is improved, and the dynamic property of the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an air intake system and a vertical axis engine. Background Art

[0002] Vertical-axis engines are distinguished by their compact design, high efficiency, and low noise levels. With their cylinders and crankshaft positioned vertically, they offer a more compact design and are easier to install and maintain. Their low noise levels make them particularly suitable for applications requiring a quiet environment.

[0003] A twin-cylinder vertical axis engine is a two-cylinder engine consisting of two identical single cylinders arranged in a single block, sharing a common crankshaft for power output. A twin-cylinder engine has two cylinder heads, requiring two intake pipes to connect them to each cylinder head for efficient air supply. To achieve a more compact overall engine structure, the intake pipes must ensure efficient air intake while minimizing their footprint.

[0004] Also, see Figure 6 The existing cylinder head has a step in the intake passage (the circle in the figure). The step blocks the airflow in the intake passage, reducing the flow rate and intake efficiency of the airflow, thereby affecting the power of the engine. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide an air intake system and a vertical axis engine to reduce the resistance encountered by air during flow, increase the air intake speed, and improve the air intake efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an intake system, including a connecting seat, which is provided with two intake holes; two intake pipes, respectively connected to the connecting seat, each of the intake pipes is connected to the corresponding intake hole, the two intake pipes are respectively bent and extended toward the two sides of the connecting seat, and the inner walls of the intake pipes have a smooth transition; and two cylinder head bodies, respectively arranged on both sides of the connecting seat, the cylinder head bodies are provided with an intake channel, a first connecting hole and a combustion chamber connected in sequence, the intake channel is connected to the intake pipe at one end away from the first connecting hole, the inner wall of the first connecting hole is an outwardly convex arc surface, and the inner diameter of the first connecting hole gradually increases in the direction toward the combustion chamber.

[0007] Preferably, the axis of the air intake passage intersects with the axis of the first connecting hole.

[0008] Preferably, a first conduit hole and a first step hole are provided in the cylinder head body, the first conduit hole is connected to the intake passage and the first connecting hole respectively, and the first step hole is connected to the combustion chamber; the first connecting hole is provided between the first conduit hole and the first step hole, and the axes of the first conduit hole, the first connecting hole and the first step hole coincide with each other.

[0009] Preferably, the angle between the air inlet channel and the horizontal plane is 17° to 20°.

[0010] Preferably, a second connecting hole and an exhaust passage are provided in the cylinder head body, the second connecting hole is connected to the combustion chamber, the inner wall of the second connecting hole is an outwardly convex arc surface, and the inner diameter of the second connecting hole gradually increases in the direction toward the combustion chamber.

[0011] Preferably, a second conduit hole and a second step hole are provided in the cylinder head body, the second conduit hole is connected to the exhaust passage and the second connecting hole respectively, and the second step hole is communicated with the combustion chamber; the second connecting hole is provided between the second conduit hole and the second step hole, and the axes of the second conduit hole, the second connecting hole and the second step hole coincide with each other.

[0012] Preferably, a fuel injector is provided on the air intake pipe, and the fuel injector extends into the air intake pipe and is close to the air intake channel.

[0013] Preferably, a support ear is provided on the outer side wall of the air inlet pipe, and a limiting groove is provided on the support ear.

[0014] Preferably, a clamping block is provided between the two air intake pipes, the clamping block is connected to the two air intake pipes respectively, and a clamping groove is provided on the air intake pipes.

[0015] The utility model also provides a vertical axis engine, comprising the above-mentioned air intake system.

[0016] Beneficial effects of the utility model:

[0017] The utility model discloses an intake system and a vertical axis engine. By designing a smoothly curved intake duct, filtered air flows along the smooth inner wall of the intake duct into the intake passage of the cylinder head body, thereby reducing resistance to air flow within the intake duct. A first connecting hole with a curved inner wall is designed at the junction of the intake passage and the combustion chamber, further reducing resistance to air flow, increasing intake velocity, thereby improving intake efficiency and, in turn, enhancing engine power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1 A schematic structural diagram of an air intake system provided in one embodiment of the present utility model;

[0020] Figure 2 is a structural diagram of the other side of the intake system;

[0021] Figure 3 Schematic diagram of the cross section of the cylinder head body;

[0022] Figure 4 It is a structural diagram of the connection between the connecting seat and the two intake pipes;

[0023] Figure 5 This is a schematic diagram of the structure in which the connecting pipe is fixed on two intake pipes;

[0024] Figure 6 It is a cross-sectional schematic diagram of a cylinder head in the prior art;

[0025] Reference numerals:

[0026] 10. Connecting seat; 11. Intake hole; 20. Intake pipe; 21. Support ear; 22. Limiting groove; 30. Cylinder head body; 31. Intake channel; 32. First connecting hole; 33. Combustion chamber; 34. First conduit hole; 35. First step hole; 36. Second connecting hole; 37. Exhaust channel; 38. Second conduit hole; 39. Second step hole; 40. Injector; 50. Block; 51. Slot. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0029] In the description of this application, 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 device or element referred to 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.

[0030] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] like Figure 1-5 As shown, in one embodiment of the present invention, an intake system is provided, including a connecting seat 10, two intake pipes 20 and two cylinder head bodies 30, the connecting seat 10 is provided with two intake holes 11, the two intake pipes 20 are respectively connected to the connecting seat 10, each intake pipe 20 is connected to the corresponding intake hole 11, the two intake pipes 20 respectively extend from the front side of the connecting seat 10 toward the two sides of the connecting seat 10 in a smooth curved manner, and the inner wall of the intake pipe 20 has a smooth transition.

[0034] The two cylinder head bodies 30 are respectively arranged on both sides of the connecting seat 10. The cylinder head body 30 is provided with an intake channel 31, a first connecting hole 32 and a combustion chamber 33 which are connected in sequence. The end of the intake channel 31 away from the first connecting hole 32 is connected to the intake pipe 20. The inner wall of the first connecting hole 32 is an outwardly convex arc surface, and the inner diameter of the first connecting hole 32 gradually increases in the direction toward the combustion chamber 33.

[0035] The intake system disclosed in this embodiment utilizes a smoothly curved intake pipe 20, allowing filtered air to flow along the smooth inner wall of the intake pipe 20 into the intake passage 31 of the cylinder head body 30. This reduces resistance to air flow within the intake pipe 20. Because the first connecting hole 32 with a curved inner wall is designed at the junction of the intake passage 31 and the combustion chamber 33, this further reduces resistance to air flow, increases intake velocity, and thus improves intake efficiency, thereby enhancing engine power.

[0036] In one embodiment, in order to further increase the flow rate of air flowing through the air intake channel 31 and the first connecting hole 32 , the axis of the air intake channel 31 intersects with the axis of the first connecting hole 32 .

[0037] In one embodiment, a first conduit hole 34 and a first stepped hole 35 are defined within the cylinder head body 30. The first conduit hole 34 connects to the intake passage 31 and the first connecting hole 32, respectively, while the first stepped hole 35 communicates with the combustion chamber 33. The first connecting hole 32 is positioned between the first conduit hole 34 and the first stepped hole 35, with the axes of the first conduit hole 34, the first connecting hole 32, and the first stepped hole 35 coinciding. This structural design facilitates machining of the first conduit hole 34, the first connecting hole 32, and the first stepped hole 35, thereby reducing machining difficulty.

[0038] In one embodiment, the angle between intake passage 31 and the horizontal plane is 17° to 20°. Because the cylinder head of a vertical-axis engine is positioned differently than that of a conventional engine, the angle of intake passage 31 is more appropriately adapted to the location of cylinder head body 30. This optimizes the angle of intake passage 31, thereby increasing the velocity of air entering combustion chamber 33.

[0039] In one embodiment, a second connecting hole 36 and an exhaust passage 37 are provided in the cylinder head body 30. The second connecting hole 36 communicates with the combustion chamber 33. The inner wall of the second connecting hole 36 is an outwardly convex arc surface, and the inner diameter of the second connecting hole 36 gradually increases toward the combustion chamber 33. By improving the inner wall of the second connecting hole 36, the exhaust resistance of the cylinder head body 30 is reduced, thereby effectively lowering the temperature of the cylinder head body 30.

[0040] In one embodiment, a second conduit hole 38 and a second stepped hole 39 are defined within the cylinder head body 30. The second conduit hole 38 is connected to the exhaust passage 37 and the second connecting hole 36, respectively, while the second stepped hole 39 communicates with the combustion chamber 33. The second connecting hole 36 is positioned between the second conduit hole 38 and the second stepped hole 39, with their axes coinciding. This structural design facilitates machining of the second conduit hole 38, the second connecting hole 36, and the second stepped hole 39, thereby reducing the machining difficulty.

[0041] In one embodiment, the intake pipe 20 is provided with a fuel injector 40, which extends into the intake pipe 20 and is close to the intake passage 31. The fuel sprayed by the fuel injector 40 can enter the cylinder head body 30 in a timely manner for combustion, thereby improving combustion efficiency.

[0042] In one embodiment, a lug 21 is provided on the outer wall of the intake pipe 20, and a retaining groove 22 is provided in the lug 21. A connecting pipe is connected between the two injectors 40, and the connecting pipe can be secured to the two intake pipes 20 using a cable tie. By designing the lug 21 with the retaining groove 22 on the intake pipe 20, the cable tie is restrained in the retaining groove 22 to prevent slipping, thereby improving the tightening effect of the connecting pipe.

[0043] In one embodiment, in order to facilitate the limiting of other pipelines, a clamping block 50 is provided between the two air inlet pipes 20 , and the clamping block 50 is respectively connected to the two air inlet pipes 20 . The clamping block 50 is close to the connecting seat 10 , and a clamping groove 51 is provided on the air inlet pipe 20 .

[0044] This embodiment also provides a vertical axis engine, including the above-mentioned air intake system. Due to the use of the above-mentioned air intake system, it has the same working principle and technical effects as the air intake system in the above-mentioned embodiment, and will not be described in detail here.

[0045] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An air intake system, characterized in that: include: The connecting seat (10) is provided with two air inlet holes (11); Two air inlet pipes (20) are respectively connected to the connecting seat (10), each of the air inlet pipes (20) is communicated with the corresponding air inlet hole (11), the two air inlet pipes (20) are respectively bent and extended toward the two sides of the connecting seat (10), and the inner walls of the air inlet pipes (20) are smoothly transitioned; and Two cylinder head bodies (30) are respectively arranged on both sides of the connecting seat (10), and the cylinder head body (30) is provided with an intake channel (31), a first connecting hole (32) and a combustion chamber (33) which are connected in sequence. The end of the intake channel (31) away from the first connecting hole (32) is connected to the intake pipe (20), the inner wall of the first connecting hole (32) is an outwardly convex arc surface, and the inner diameter of the first connecting hole (32) gradually increases in a direction toward the combustion chamber (33).

2. The air intake system according to claim 1, characterized in that The axis of the air intake channel (31) intersects with the axis of the first connecting hole (32).

3. The air intake system according to claim 1, characterized in that: A first conduit hole (34) and a first step hole (35) are provided in the cylinder head body (30), wherein the first conduit hole (34) is connected to the intake passage (31) and the first connecting hole (32) respectively, and the first step hole (35) is communicated with the combustion chamber (33); The first connecting hole (32) is provided between the first conduit hole (34) and the first step hole (35), and the axes of the first conduit hole (34), the first connecting hole (32) and the first step hole (35) coincide with each other.

4. The air intake system according to claim 1, characterized in that The included angle between the air inlet channel (31) and the horizontal plane is 17° to 20°.

5. The air intake system according to claim 1, characterized in that A second connecting hole (36) and an exhaust passage (37) are provided in the cylinder head body (30). The second connecting hole (36) is connected to the combustion chamber (33). The inner wall of the second connecting hole (36) is an outwardly convex arc surface. The inner diameter of the second connecting hole (36) gradually increases in a direction toward the combustion chamber (33).

6. The air intake system according to claim 5, characterized in that: A second conduit hole (38) and a second step hole (39) are provided in the cylinder head body (30), the second conduit hole (38) being connected to the exhaust passage (37) and the second connecting hole (36) respectively, and the second step hole (39) being communicated with the combustion chamber (33); The second connecting hole (36) is provided between the second conduit hole (38) and the second step hole (39), and the axes of the second conduit hole (38), the second connecting hole (36) and the second step hole (39) coincide with each other.

7. The air intake system according to claim 1, characterized in that The air intake pipe (20) is provided with an injector (40), and the injector (40) extends into the air intake pipe (20) and is close to the air intake channel (31).

8. The air intake system according to claim 1, characterized in that A support ear (21) is provided on the outer side wall of the air inlet pipe (20), and a limiting groove (22) is provided on the support ear (21).

9. The air intake system according to claim 1, characterized in that A clamping block (50) is provided between the two air intake pipes (20), and the clamping block (50) is connected to the two air intake pipes (20) respectively. A clamping groove (51) is provided on the air intake pipe (20).

10. A vertical axis engine, characterized in that: An air intake system comprising the air intake system according to any one of claims 1 to 9.

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