Air cleaner for two-wheeled motor vehicle and two-wheeled motor vehicle

Abstract

This application relates to an air filter for a two-wheeled motorcycle and the two-wheeled motorcycle itself. The air filter includes a housing, a filter element, and a first baffle. The housing has an internal mounting cavity. A portion of the housing's sidewall extends into the mounting cavity to form an air intake pipe, which communicates with the mounting cavity. The air intake pipe has an air inlet communicating with the external environment. The filter element is installed in the mounting cavity. The first baffle is located on the side of the housing where the air inlet is located. The first baffle is connected to the housing and protrudes from the outer wall of the housing. The first baffle is positioned close to the filter element relative to the air intake pipe. This air filter for a two-wheeled motorcycle reduces the number of parts to improve assembly efficiency and increases the volume of the mounting cavity to improve filtration efficiency, while simultaneously reducing the risk of engine damage from water ingress.

Description

Technical Field

[0001] This application relates to the field of air filter technology, and in particular to an air filter for a two-wheeled motorcycle and the motorcycle itself. Background Technology

[0002] As a crucial component of motorcycles, the air filter's function is to filter and purify the air entering the engine, removing dust, sand, and other particles. In related technologies, an air filter includes a housing, an intake pipe, and a waterproof cover. The housing has an internal mounting cavity and is assembled from the housing and a cover. The cover also has a connection structure for mounting to the intake pipe. Air filters have a large number of parts, resulting in low assembly efficiency. Furthermore, the air filter's dimensions are limited by the installation space on the motorcycle. The multiple connection structures on the housing result in a small mounting cavity, reducing the air filter's filtration efficiency. Additionally, the installation gap between the waterproof cover and the housing allows rainwater to easily enter the intake pipe, potentially causing engine damage. Summary of the Invention

[0003] Therefore, it is necessary to provide an air filter for a two-wheeled motorcycle and a two-wheeled motorcycle, which reduces the number of parts in the air filter to improve assembly efficiency, increases the volume of the mounting cavity to improve filtration efficiency, and reduces the risk of engine damage from water ingress.

[0004] In a first aspect, embodiments of this application provide an air filter for a two-wheeled motorcycle, comprising:

[0005] The housing has an internal mounting cavity, and a portion of the housing's sidewall extends toward the interior of the mounting cavity to form an air intake pipe. The air intake pipe communicates with the mounting cavity and has an air inlet that communicates with the external environment.

[0006] The filter element is installed in the mounting cavity;

[0007] A first baffle is located on the side of the housing where the air inlet is located. The first baffle is connected to the housing and protrudes from the outer wall of the housing. The first baffle is positioned relative to the air inlet pipe and close to the filter element.

[0008] In one embodiment, the extension direction of the first baffle is parallel to the extension direction of the air intake pipe.

[0009] In one embodiment, the minimum distance between the outer wall of the air intake pipe and the filter element is M, where M ≥ 15 mm.

[0010] In one embodiment, the distance between the end of the first baffle away from the housing and the outer wall of the housing is L1, where L1 ≥ 10 mm.

[0011] In one embodiment, the minimum distance between the filter element and the sidewall opposite to the mounting cavity is T, where T ≥ 6 mm, in the direction from the filter element to the air intake pipe.

[0012] In one embodiment, the volume of the mounting cavity is greater than 635 mL.

[0013] In one embodiment, the filter element divides the mounting cavity into a dirty cavity and a clean cavity, the volume of the dirty cavity being V1 and the volume of the clean cavity being V2, where 1 ≤ V1 : V2 ≤ 1.1.

[0014] Secondly, embodiments of this application also provide a two-wheeled motorcycle, including a waterproof cover and an air filter for the two-wheeled motorcycle as described in any one of the first aspects. The waterproof cover is connected to the housing and surrounds the first baffle and the air inlet. The distance between the end of the first baffle away from the housing and the inner wall of the waterproof cover is L2, where L2 ≥ 5 mm.

[0015] In one embodiment, a mudguard is further included, wherein a portion of the outer wall of the housing extends in a direction opposite to the mounting cavity to form a second baffle, at least a portion of the second baffle being located between the waterproof cover and the mudguard; and / or,

[0016] The two-wheeled motorcycle also includes a seat support, the waterproof cover is located between the housing and the seat support, and the seat support and the waterproof cover together form an air guide channel, which is connected to the air inlet.

[0017] In one embodiment, the waterproof cover has an opening on the side facing the air intake pipe, and the seat cushion bracket has a third baffle that surrounds the opening.

[0018] The air filter for the aforementioned two-wheeled motorcycle has an internal mounting cavity within its housing. A portion of the housing's sidewall extends into the mounting cavity to form an intake pipe, which communicates with the mounting cavity and has an air inlet connecting to the external environment. The mounting cavity is formed within the housing, eliminating the need for a cover to be attached to it. Furthermore, the housing and intake pipe are integrally molded, reducing the number of parts in the air filter and improving assembly efficiency. The absence of connecting structures on the housing increases the volume of the mounting cavity, thereby enhancing filtration efficiency. Additionally, a first baffle is located on the side of the housing where the air inlet is located. The first baffle is connected to the housing and protrudes from its outer wall. Positioned closer to the filter element than the intake pipe, the first baffle effectively blocks rainwater from entering through the mounting gap between the waterproof cover and the housing, reducing the risk of engine damage from water ingress. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation of an air filter for a two-wheeled motorcycle in one embodiment of this application.

[0020] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0021] Figure 3 This is a schematic diagram showing the distribution of the filter elements in one embodiment of this application.

[0022] The attached figures are labeled as follows:

[0023] 1. Housing; 11. Second baffle; 100. Mounting cavity; 110. Dirty cavity; 120. Clean cavity; 2. Air intake pipe; 21. Air inlet; 3. Filter element; 4. First baffle; 5. Waterproof cover; 51. Opening; 6. Mudguard; 7. Seat cushion bracket; 71. Third baffle; 8. Air guide channel. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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 expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figure 1An embodiment of this application provides an air filter for a two-wheeled motorcycle, comprising a housing 1, a filter element 3, and a first baffle 4. The housing 1 has an internal mounting cavity 100. A portion of the sidewall of the housing 1 extends into the mounting cavity 100 to form an intake pipe 2, which communicates with the mounting cavity 100. The intake pipe 2 has an air inlet 21 that communicates with the external environment. In this application, the mounting cavity 100 is formed inside the housing 1, and the housing 1 and the intake pipe 2 are integrally formed. Compared to related technologies where the air filter's outer shell is assembled from the housing 1 and a cover, and the intake pipe 2 and cover are separate designs, this application eliminates the need for a separate cover to be assembled with the housing 1 to form the mounting cavity 100, reducing the number of parts in the air filter and improving assembly efficiency. Furthermore, the housing 1 does not require connecting structures, increasing the volume of the mounting cavity 100 to improve filtration efficiency. The filter element 3 is installed in the mounting cavity 100 to filter the air entering the mounting cavity 100 through the intake pipe 2, removing dust, sand and other impurities from the air. The purified clean air is then delivered to the engine intake manifold to ensure the quality of air supply to the combustion chamber, improve combustion efficiency and extend engine service life.

[0031] like Figure 2 As shown, there is an installation gap between the air filter's waterproof cover 5 and the housing 1 on the side near the mudguard 6. Rainwater can easily flow along the path shown in the figure (in the direction of the solid arrow) on the outer wall of the housing 1 and approach the intake pipe 2. Under the suction of the intake pipe 2, the rainwater can easily enter the mounting cavity 100, causing water ingress and damage to the engine. In this application, as... Figure 2 As shown, the first baffle 4 is located on the side of the housing 1 where the air inlet 21 is located. The first baffle 4 is connected to the housing 1 and protrudes from the outer wall of the housing 1. The first baffle 4 is positioned relative to the air intake pipe 2 and close to the filter element 3. The first baffle 4 can block rainwater that passes through the installation gap between the waterproof cover 5 and the housing 1, reducing the risk of engine damage from water ingress.

[0032] In related technologies, the air intake pipe is connected to the housing via a connecting structure on the cover. Due to the limitations of this connecting structure, the gaps between the air intake pipe, the filter element, and the inner wall of the cover are relatively small. After air flows into the installation cavity from the air intake pipe, it is obstructed by the pipe wall and the inner wall of the cover, resulting in less contact between the end of the filter element near the air intake pipe and the air. The filtration area of ​​the filter element is concentrated at the end furthest from the air intake pipe, reducing the air filtration efficiency. In this application, as... Figure 3 As shown, since the intake pipe 2 and the housing 1 are integrally formed, the minimum distance between the outer wall of the intake pipe 2 and the filter element 3 is M, where M ≥ 15mm. When M < 15mm, the gap between the intake pipe 2 and the filter element 3 is too small, affecting the filtration efficiency of the filter element 3. M can be 15mm, 20mm, or 23mm, etc., and can be adjusted according to actual needs.

[0033] Furthermore, in the direction from the filter element 3 to the air intake duct 2, the minimum distance between the filter element 3 and the opposite sidewall of the mounting cavity 100 is T, where T ≥ 6 mm. This increases the airflow space around the filter element 3, allowing the airflow from the air intake duct 2 to be evenly distributed or flow around the filter element 3. This significantly increases the effective contact area and airflow volume between the end of the filter element 3 near the air intake duct 2 and the air to be purified per unit time. The airflow no longer only filters impurities through a localized area of ​​the filter element 3; it can intercept impurities in the air throughout all areas of the filter element 3, effectively improving air purification efficiency and the utilization rate of the filter element 3. If T < 6 mm, the gap between the filter element 3 and the sidewall of the mounting cavity 100 is too small, and the airflow can only concentrate and pass through the central area of ​​the filter element 3. The filter surface near the air intake duct 2 cannot fully participate in the filtration work, reducing filtration efficiency and easily leading to premature clogging of the filter element and concentrated dust accumulation. In addition, impurities are prone to accumulating in narrow gaps, which can cause localized air blockage with long-term use, shortening the service life of the filter element 3. T can be 6mm, 8mm or 9mm, etc., and can be adaptively optimized and adjusted according to the overall cavity structure of the air filter, the diameter of the intake pipe 2, the outer dimensions of the filter element 3 and the overall vehicle layout space.

[0034] Furthermore, such as Figure 2 As shown, to simplify the connection structure between the first baffle 4 and the housing 1, in one embodiment, the first baffle 4 and the housing 1 are integrally molded by injection molding, which improves the connection efficiency between the housing 1 and the first baffle 4. Furthermore, to facilitate demolding of the first baffle 4, in one embodiment, the first baffle 4 extends along the direction from the housing 1 towards the mudguard 6, and the extension direction of the first baffle 4 is parallel to the extension direction of the air intake pipe 2. That is, the extension direction of the first baffle 4 is parallel to the axial direction of the air intake pipe 2. This avoids the formation of an undercut structure due to an angular difference between the first baffle 4 and the air intake pipe 2, improving the demolding efficiency of the housing 1. Simultaneously, it increases the axial dimension of the first baffle 4 in the air intake pipe 2, increasing the area of ​​the first baffle 4 that blocks rainwater and further reducing the risk of rainwater entering the air intake pipe 2.

[0035] Furthermore, such as Figure 3As shown, the distance between the end of the first baffle 4 furthest from the housing 1 and the outer wall of the housing 1 is L1, where L1 ≥ 10 mm. When L1 ≥ 10 mm, the first baffle 4 has a good water-blocking effect. The first baffle 4 and the outer wall of the housing 1 form a groove structure. This groove can effectively receive rainwater or splashing water droplets flowing through the gap between the housing 1 and the waterproof cover on the outer wall of the housing 1. It allows water to accumulate and converge in the groove and drain along a preset path. At the same time, it extends the flow path required for the water to bypass the top of the first baffle, suppressing the risk of the water rising upwards and overturning the first baffle 4 due to inertia, capillary action, or airflow entrainment. It effectively blocks the flow path of water flowing through the outer wall of the housing 1, bypassing the end of the first baffle 4 furthest from the outer wall of the housing 1, to the air inlet 21 of the air inlet pipe 2, reducing the risk of water entering the air filter. If L1 < 10mm, when water flows through the outer wall of the housing 1, due to the small volume of the groove structure formed between the first baffle 4 and the outer wall of the housing 1, the water can easily bypass the end of the first baffle 4 away from the outer wall of the housing 1 and flow into the air intake pipe 2, causing water to enter the air filter. L1 can be 10mm, 12mm or 15mm, etc., and can be adjusted according to actual needs.

[0036] Furthermore, in this application, since there is no need to install a cover and the complex connection structures such as flanges, threaded interfaces, sealing rings, and matching fasteners that rigidly connect the cover, intake pipe 2, and housing 1 are omitted, the overall assembly process of the air filter is simplified, fundamentally releasing the spatial constraints inside the mounting cavity 100 and increasing the volume of the mounting cavity 100. In some embodiments, the volume of the mounting cavity 100 is greater than 635mL. In this way, all the space originally occupied by the connected structures in the mounting cavity 100 is converted into effective filtration volume, increasing the amount of gas entering the mounting cavity 100 per unit time, and further improving the filtration efficiency of the air filter. Specifically, in one embodiment, the volume of the mounting cavity 100 can reach 760mL. Compared with air filters with a cover in related technologies, the volume of the mounting cavity is increased by about 28% to 42% (based on the standard value of 635mL for conventional air filters of the same class of vehicles), increasing the transient air storage capacity of the air filter, effectively buffering intake pulsation under rapid engine acceleration, reducing the amplitude of airflow pressure fluctuations, and improving intake uniformity. In addition, the residence time and flow path of the airflow in the mounting cavity 100 are extended so that impurities can settle fully under the action of gravity, thereby improving the filtration effect.

[0037] Furthermore, the filter element 3 is fixed inside the mounting cavity 100 in a sealed assembly manner. Its circumferential edge is airtightly connected to the inner wall of the mounting cavity 100 via an elastic sealing ring or structured snap-fit, thereby dividing the mounting cavity 100 into a mutually isolated and leak-free dirty cavity 110 and a clean cavity 120. For example... Figure 2As shown, the dirty chamber 110 is located above the filter element 3 and is connected to the intake duct 2. The static chamber is located below the filter element 3. After air enters the dirty chamber 110 from the intake duct 2, a preliminary stable flow is formed within the dirty chamber 110. Driven by the negative pressure of the engine intake, the air is uniformly penetrated through the filter element 3 to remove impurities. The purified clean air then passes through the filter element 3 and enters the clean chamber 120, and is stably and with low pulsation delivered to the engine interior through the outlet of the clean chamber 120. Since the dirty chamber 110 mainly serves the functions of intake buffering, airflow uniform distribution, and initial impurity settling, its volume needs to be large enough to reduce local flow velocity, suppress turbulence disturbance, and delay premature clogging of the filter element surface by dust layer. The volume of the dirty chamber 110 is V1. The clean chamber 120 primarily functions as a pressure stabilizer, energy storage unit, and pressure smoother. Its volume needs to be moderate to reduce intake response delay, while avoiding excessive volume that could increase intake pressure fluctuations under dynamic conditions. The volume of the clean chamber 120 is V2, where 1 ≤ V1:V2 ≤ 1.1. If V1:V2 < 1, the dirty chamber 110 has insufficient volume, resulting in excessively high gas velocity in the intake pipe 2. A large amount of impurities directly impacts the filter element 3, accumulating on its surface and causing blockage, thus affecting filtration efficiency. If V1:V2 > 1.1, the dirty chamber 110 is too large, prolonging the airflow path and residence time from the intake pipe 2 to the filter element 3. This increases the risk of condensation buildup in high humidity environments and also reduces air filtration efficiency.

[0038] Based on the same concept, this application also provides a two-wheeled motorcycle, including a waterproof cover 5 and the aforementioned air filter. The waterproof cover 5 is connected to the housing 1 and surrounds the first baffle 4 and the air inlet 21. Specifically, the waterproof cover 5 is fixed to the outer periphery of the housing 1 by means of buckles, elastic clamps, or screws, and completely covers the outside of the first baffle 4 and the air inlet 21 of the air intake pipe 2. This not only prevents splashed mud, sand, and road debris from directly impacting the air inlet 21 during riding, but also reduces turbulent noise and pressure pulsation induced by high-speed airflow at the edge of the air inlet, thus improving the overall NVH performance of the vehicle. To avoid interference between the first baffle 4 and the waterproof cover 5 during installation, the distance between the end of the first baffle 4 away from the housing 1 and the inner wall of the waterproof cover 5 is L2, where L2 ≥ 5mm. If L2 < 5mm, the waterproof cover 5 may vibrate and contact the first baffle 4, causing abnormal noise when the motorcycle is in motion. L2 can be 5mm, 6mm, or 8mm, etc., and can be adjusted adaptively according to actual design requirements.

[0039] like Figure 2 As shown, the motorcycle also includes a mudguard 6, used to block mud, gravel, and road water splashed out during wheel rotation. When the motorcycle is in motion, because the mudguard 6 (specifically the mudguard at the rear wheel) is located close to the housing 1, rainwater can easily flow from below the mudguard 6 through the gap between the waterproof cover 5 and the housing 1 towards the air intake pipe 2. To block the rainwater, such as... Figure 2As shown, a second baffle 11 is formed by a portion of the outer wall of the housing 1 extending in the direction opposite to the mounting cavity 100. At least a portion of the second baffle 11 is located between the waterproof cover 5 and the mudguard 6. That is, the second baffle 11 fills the gap between the waterproof cover 5 and the mudguard 6 and can block water droplets splashing from below the mudguard 6, further reducing the risk of water ingress into the air filter.

[0040] Furthermore, the motorcycle also includes a seat support 7, with a waterproof cover 5 located between the housing 1 and the seat support 7 to facilitate the introduction of air from the external environment into the air intake duct 2. For example... Figure 2 As shown, in one embodiment, an air duct 8 is formed between the seat cushion support 7 and the waterproof cover 5, and the air duct 8 communicates with the air inlet 21. Figure 2 As shown in the diagram, the direction indicated by the dashed arrows is the direction of airflow. Air enters the dirty chamber 110 through the air intake pipe 2 via the air guide channel 8, then passes through the filter element 3 to filter impurities, and subsequently enters the clean chamber 120.

[0041] Furthermore, the waterproof cover 5 has an opening 51 on the side facing the air intake pipe 2. In order to prevent rainwater from entering the air intake pipe 2 along the length of the seat support 7, a third baffle 71 is provided on the seat support 7. The third baffle 71 is arranged around the opening 51 to block rainwater and further reduce the risk of water entering the air filter.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0043] The embodiments described above are merely illustrative of 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 air filter for a two-wheeled motorcycle, characterized in that, include: The housing has an internal mounting cavity, and a portion of the housing's sidewall extends toward the interior of the mounting cavity to form an air intake pipe. The air intake pipe communicates with the mounting cavity and has an air inlet that communicates with the external environment. The filter element is installed in the mounting cavity; A first baffle is located on the side of the housing where the air inlet is located. The first baffle is connected to the housing and protrudes from the outer wall of the housing. The first baffle is positioned relative to the air inlet pipe and close to the filter element.

2. The air filter for a two-wheeled motorcycle according to claim 1, characterized in that, The extension direction of the first baffle is parallel to the extension direction of the air intake pipe.

3. The air filter for a two-wheeled motorcycle according to claim 1, characterized in that, The minimum distance between the outer wall of the air intake pipe and the filter element is M, where M ≥ 15 mm.

4. The air filter for a two-wheeled motorcycle according to claim 1, characterized in that, The distance between the end of the first baffle away from the housing and the outer wall of the housing is L1, where L1 ≥ 10 mm.

5. The air filter for a two-wheeled motorcycle according to claim 1, characterized in that, In the direction from the filter element to the air intake pipe, the minimum distance between the filter element and the side wall opposite to the mounting cavity is T, where T ≥ 6 mm.

6. The air filter for a two-wheeled motorcycle according to claim 1, characterized in that, The volume of the mounting cavity is greater than 635 mL.

7. The air filter for a two-wheeled motorcycle according to claim 1, characterized in that, The filter element divides the mounting cavity into a dirty cavity and a clean cavity, the volume of the dirty cavity is V1, and the volume of the clean cavity is V2, where 1≤V1:V2≤1.

1.

8. A two-wheeled motorcycle, characterized in that, The invention includes a waterproof cover and an air filter for a two-wheeled motorcycle as described in any one of claims 1-7. The waterproof cover is connected to the housing and surrounds the first baffle and the air inlet. The distance between the end of the first baffle away from the housing and the inner wall of the waterproof cover is L2, where L2 ≥ 5 mm.

9. The two-wheeled motorcycle according to claim 8, characterized in that, It also includes a mudguard, wherein a portion of the outer wall of the housing extends in a direction opposite to the mounting cavity to form a second baffle, at least a portion of the second baffle being located between the waterproof cover and the mudguard; and / or, The two-wheeled motorcycle also includes a seat support, the waterproof cover is located between the housing and the seat support, and the seat support and the waterproof cover together form an air guide channel, which is connected to the air inlet.

10. The two-wheeled motorcycle according to claim 9, characterized in that, The waterproof cover has an opening on the side facing the air intake pipe, and the seat cushion bracket has a third baffle that surrounds the opening.

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