Air filter and motorcycle

Abstract

The invention discloses an air filter and a motorcycle. The air filter comprises a lower shell, an upper shell, a filter element support and a flow guide support. The lower shell is connected with a high-position air inlet pipe and an air outlet pipe, an inner partition plate is arranged in an inner cavity of the lower shell to form a pre-air inlet cavity and an air outlet cavity, the upper shell is connected to the upper end face of the lower shell, a filter element is arranged on the filter element support, and the flow guide support is located in the inner cavity of the upper shell and comprises a U-shaped plate and a porous partition plate. The porous partition plates are vertically distributed on the convex face of the U-shaped plate, the edges of the U-shaped plate and the porous partition plates abut against the inner wall of the upper shell to form a silencing cavity and a main flow channel cavity, the main flow channel cavity is communicated with the pre-air-inlet cavity, the concave face of the U-shaped plate is arranged above the filter element in a covering mode to form a pre-filtering air inlet cavity, and a support air inlet pipe is arranged on the U-shaped plate to communicate the main flow channel cavity with the pre-filtering air inlet cavity. The filter element has the capacity of multi-stage filtration and multiple noise reduction, is convenient to arrange in a compact small-displacement motorcycle, and reduces the risk that the filter element loses efficacy due to the fact that rainwater is sucked in.

Description

Technical Field

[0001] The present invention relates to the technical field of motorcycles, and in particular, to an air filter and a motorcycle. Background Art

[0002] In the related art, the air filter of a motorcycle filters the air entering the engine and silences the intake noise generated by the engine. The existing silencing measures mainly utilize the principle of acoustic wave interference, such as adding a resonance cavity (Helmholtz resonator) to the air outlet pipe of the air filter or designing a 1 / 4 wavelength tube (Quarter-Wave resonator), etc. It is difficult to find space to layout the resonance cavity or 1 / 4 wavelength tube in a compact small-displacement motorcycle. In order to avoid the dust raised under the motorcycle, high-position intake is usually adopted, but there is resonance of the air flow caused by the long intake pipe, resulting in noise, and it is easy to inhale rainwater on rainy days, which may cause the filter element to fail and affect the performance of the engine seriously. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art. For this purpose, the present invention provides an air filter, which through structural improvement, does not require additional space, effectively reduces or eliminates the air flow resonance caused by the long intake pipe in high-position intake, and prevents the filter element from being wetted by inhaling rainwater when driving in rainy days.

[0004] According to an embodiment of the present invention, there is provided an air filter, including a lower housing, an upper housing, a filter element bracket, and a flow guide bracket. The lower housing is connected with a high-position intake pipe and an outlet pipe. An inner partition is arranged in the inner cavity of the lower housing to form a pre-intake cavity and an outlet cavity. The high-position intake pipe communicates with the pre-intake cavity, and the outlet pipe communicates with the outlet cavity. The upper housing is connected to the upper end surface of the lower housing. The filter element bracket is arranged between the lower housing and the upper housing, and a filter element is arranged on the filter element bracket. The filter element is located in the outlet cavity. The flow guide bracket is located in the inner cavity of the upper housing. The flow guide bracket includes a U-shaped plate and a porous partition. The porous partition is vertically distributed on the convex surface of the U-shaped plate. The edges of the U-shaped plate and the porous partition abut against the inner wall of the upper housing to form a silencing cavity and a main flow channel cavity. The main flow channel cavity communicates with the pre-intake cavity. The concave surface of the U-shaped plate covers the upper part of the filter element to form a pre-filter intake cavity. A bracket intake pipe is arranged on the U-shaped plate to communicate the main flow channel cavity and the pre-filter intake cavity.

[0005] An air filter according to an embodiment of the present invention has at least the following beneficial effects: The air filter sucks air from the high-position intake pipe. The air first enters the pre-intake cavity, which can preliminarily filter the outside air to prevent large particle dust, water droplets and oil droplets from infecting the main filter element, and can also play a role in resonance noise reduction. Then the air enters the pre-filter intake cavity through the main flow channel cavity and the support intake pipe, is filtered by the filter element, and finally is transported to the engine through the outlet pipe. The sound-absorbing cavity is separated by a porous partition. Adjusting the thickness of the porous partition and the volume of the sound-absorbing cavity can eliminate or reduce the noise of the target frequency, reduce noise radiation, reduce or eliminate the air flow resonance caused by the long intake pipe in the high-position intake, and can effectively eliminate the noise of a specific frequency band generated on the flow channel. By dividing the interior of the air filter into multiple chambers, it has the ability of multi-stage filtration and multiple noise reduction. Under the premise of ensuring the pre-defined flow-pressure drop characteristic curve, the chamber volume and position distribution are adjusted as needed to achieve continuous and stable air intake. Since no extra resonance cavity is introduced to occupy space, only the air intake method of the existing high-position intake structure is adjusted, making it convenient to be arranged in a compact small-displacement motorcycle, and reducing the risk of filter element failure caused by inhaled rainwater, thus improving the use reliability.

[0006] According to some embodiments of the first aspect of the present invention, the guiding bracket has two pieces of the porous partitions, the edges of the two pieces of the porous partitions abut against the inner wall of the upper shell, the sound-absorbing cavity includes a first sound-absorbing cavity and a second sound-absorbing cavity, and the first sound-absorbing cavity and the second sound-absorbing cavity are distributed on both sides of the main flow channel cavity.

[0007] According to some embodiments of the first aspect of the present invention, the volume of the first sound-absorbing cavity is smaller than the volume of the second sound-absorbing cavity.

[0008] According to some embodiments of the first aspect of the present invention, the filter element bracket is provided with three grooves, which respectively correspond to the first sound-absorbing cavity, the main flow channel cavity and the second sound-absorbing cavity.

[0009] According to some embodiments of the first aspect of the present invention, the support intake pipe is a flexible pipe, and the support intake pipe extends above the middle part of the filter element.

[0010] According to some embodiments of the first aspect of the present invention, the outer wall of the support intake pipe is provided with a mounting plate, the edge of the mounting plate is provided with a clamping groove, the end of the U-shaped plate is provided with a notch, the support intake pipe passes through the notch, and the U-shaped plate is clamped into the clamping groove.

[0011] According to some embodiments of the first aspect of the present invention, the filter element bracket covers the pre-intake cavity, and the filter element bracket is provided with through holes to communicate the pre-intake cavity and the main flow channel cavity.

[0012] According to some embodiments of the first aspect of the present invention, the upper housing and / or the lower housing are provided with drain holes, the filter element bracket is provided with small holes, the small holes communicate with the pre-intake cavity, and the small holes and the drain holes are located on the same side of the filter element bracket.

[0013] According to some embodiments of the first aspect of the present invention, mounting grooves are provided on the opposite end faces of the lower housing and the upper housing, and positioning flanges are provided on the edge of the filter element bracket, and the positioning flanges are installed in the mounting grooves.

[0014] A motorcycle according to an embodiment of the second aspect of the present invention includes the air filter according to the embodiment of the first aspect.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of an air filter according to an embodiment of the present invention; Figure 2 is an exploded schematic diagram of an air filter according to an embodiment of the present invention; Figure 3 is an exploded schematic diagram of the upper housing, the filter element bracket and the flow guide bracket according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of the flow guide bracket according to an embodiment of the present invention.

[0017] DESCRIPTION OF THE REFERENCE NUMERALS Lower housing 100, pre-intake cavity 101, air outlet cavity 102, mounting groove 103, high-position intake pipe 110, air outlet pipe 120, inner partition 130, upper housing 200, drain hole 201, filter element bracket 300, pre-filter intake cavity 301, groove 302, through hole 303, small hole 304, positioning flange 305, filter element 310, flow guide bracket 400, main flow channel cavity 401, first sound-absorbing cavity 402, second sound-absorbing cavity 403, U-shaped plate 410, notch 411, porous partition 420, bracket intake pipe 430, mounting plate 431. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and the understanding of "greater than", "less than", "exceeding", etc. does not include the present number, while the understanding of "above", "below", "within", etc. includes the present number. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0022] Referring to Figures 1 to 4 , this application proposes an air filter, which is applied to motorcycles, especially suitable for compact small-displacement motorcycles, and has better noise reduction and filtering effects.

[0023] In the structure of a motorcycle, the air filter is responsible for filtering dust, water droplets and oil droplets in the air to ensure the cleanliness of the air entering the engine, thereby protecting the normal operation of the engine. The noise reduction measures of the air filter, such as adding a resonance cavity (Helmholtz resonator) to the air outlet pipe of the air filter or designing a 1 / 4 wavelength tube (Quarter-Wave resonator) using the principle of acoustic wave interference, etc., face the problem of space limitation in compact small-displacement motorcycles. Due to the compact structure, it is very difficult to set aside space to layout these noise reduction devices.

[0024] In addition, in order to avoid the dust raised under the motorcycle, a high-position intake design is usually adopted. However, the high-position intake structure has a long intake duct, which is prone to cause resonance of the air flow, thereby generating noise. In rainy days, the high-position intake structure is also prone to inhaling rainwater. After the rainwater enters the air filter, it will wet the filter element, and in severe cases, it will cause the filter element to fail, thereby affecting the performance of the engine.

[0025] The air filter proposed in this application includes a lower housing 100, an upper housing 200, a filter element bracket 300, and a flow guide bracket 400. The lower housing 100 is connected with a high-position intake pipe 110 and an outlet pipe 120. An inner partition 130 is arranged in the inner cavity of the lower housing 100 to form a pre-intake cavity 101 and an air outlet cavity 102. The high-position intake pipe 110 communicates with the pre-intake cavity 101 for sucking in external air; the outlet pipe 120 communicates with the air outlet cavity 102 for delivering the filtered air to the engine. The upper housing 200 is connected to the upper end face of the lower housing 100 to close the upper opening of the lower housing 100 and jointly form the outer shell of the air filter with the lower housing 100. The filter element bracket 300 is arranged between the lower housing 100 and the upper housing 200 for installing the filter element 310. Most of the filter element 310 is located in the air outlet cavity 102 for filtering dust, water droplets, and oil droplets in the air.

[0026] The flow guide bracket 400 is located in the inner cavity of the upper housing 200 and is one of the key components of this application. The flow guide bracket 400 includes a U-shaped plate 410 and a porous partition 420. The porous partition 420 is vertically distributed on the convex surface of the U-shaped plate 410. The edges of the U-shaped plate 410 and the porous partition 420 abut against the inner wall of the upper housing 200 and form a silencing cavity and a main flow channel cavity 401. The concave surface of the U-shaped plate 410 covers the upper part of the filter element 310 to form a pre-filter intake cavity 301. The main flow channel cavity 401 communicates with the pre-intake cavity 101. A bracket intake pipe 430 is arranged on the U-shaped plate 410 to communicate the main flow channel cavity 401 and the pre-filter intake cavity 301, so as to guide the air to the filter element 310.

[0027] It can be understood that an inner partition 130 is arranged in the inner cavity of the lower housing 100. The inner partition 130 divides the inner cavity of the lower housing 100 into a pre-intake cavity 101 and an air outlet cavity 102, and the volume of the pre-intake cavity 101 is relatively small. When the air filter is installed on a motorcycle, the high-position intake pipe 110 is vertical. After the air sucked in from the high-position intake pipe 110 enters the pre-intake cavity 101, due to the action of gravity, large particles of dust and water droplets remain in the pre-intake cavity 101 for the first rough filtration.

[0028] Then the air enters the main flow channel cavity 401. Part of the air enters the silencing cavity through the holes of the porous partition 420. The silencing cavity has the function of a resonance cavity to help reduce noise. Then, the air enters the pre-filter intake cavity 301 through the bracket intake pipe 430. Since the volume of the pre-filter intake cavity 301 is relatively large, it can reduce the air turbulence and collision and help reduce noise.

[0029] The filter element bracket 300 is arranged between the lower housing 100 and the upper housing 200 for supporting the filter element 310. The shape and size of the filter element bracket 300 should be designed according to the shape and size of the filter element 310 to ensure that the filter element 310 can be stably installed on the filter element bracket 300.

[0030] The filter element 310 is the core component of the air filter, which is used to filter dust, water droplets and oil droplets in the air. The material of the filter element 310 should be selected as high-efficiency filter materials, such as paper filter elements, fiber filter elements, etc., to ensure the filtering effect and durability. The filtering accuracy and filtering area of the filter element 310 should be designed according to the intake air requirements of the engine and the overall size of the air filter. The filter element support 300 adopts a frame structure, which has sufficient strength and stiffness to bear the weight of the filter element 310 and various loads during the working process.

[0031] The U-shaped plate 410 has a convex surface and a concave surface. The convex surface faces the inner wall of the upper housing 200, and the concave surface covers the upper part of the filter element 310. The U-shaped plate 410, the upper housing 200 and the filter element support 300 jointly enclose the forward filter intake chamber 301. The edge of the U-shaped plate 410 is in close contact with the inner wall of the upper housing 200, which can prevent air leakage. The porous partition plate 420 is vertically distributed on the convex surface of the U-shaped plate 410. The porous partition plate 420, the U-shaped plate 410 and the upper housing 200 jointly form a sound-absorbing chamber and a main flow channel chamber 401. The thickness and porosity of the porous partition plate 420 can be adjusted according to the target frequency noise to eliminate or reduce the target frequency noise and reduce noise radiation.

[0032] As Figure 4 shown, the U-shaped plate 410 and the porous partition plate 420 of the flow guide support 400 are integrally formed, and there are rib plates between them to improve the structural strength and stiffness, reduce vibration and avoid generating new noise. Moreover, the rib plates can be fixed to the upper housing 200 by screws to accurately fix the flow guide support 400. The flow guide support 400 and the filter element support 300 are also fixed by screws, which is beneficial to form an integral structure and improve vibration.

[0033] When the engine of the motorcycle is running, air enters the pre-intake chamber 101 from the high-position intake pipe 110. The pre-intake chamber 101 can preliminarily filter the outside air to prevent large-particle dust, water droplets and oil droplets from infecting the filter element 310. At the same time, the pre-intake chamber 101 can also play a role in resonance noise reduction and reduce the air noise entering the air filter.

[0034] The preliminarily filtered air enters the main flow channel chamber 401, and the flow noise is reduced by using the porous partition plate 420 and the sound-absorbing chamber during the flowing process. Then it enters the forward filter intake chamber 301 through the support intake pipe 430, and then passes through the filtration of the filter element 310 to further remove dust, water droplets and oil droplets in the air. The filtering accuracy and filtering area of the filter element 310 can be designed according to the intake air requirements of the engine and the overall size of the air filter to ensure the filtering effect and durability. The air filtered by the filter element 310 enters the outlet chamber 102 and is finally delivered to the engine through the outlet pipe 120.

[0035] Adjusting the thickness of the porous partition 420 and the volume of the sound absorption cavity can eliminate or reduce the noise at the target frequency and reduce noise radiation.

[0036] The air filter of the present application sucks air from the high-position intake pipe 110. The air first enters the pre-intake cavity 101 for preliminary filtration and noise reduction, then passes through the main flow channel cavity 401 and the support intake pipe 430 to enter the pre-filter intake cavity 301, and then passes through the filtration of the filter element 310, and finally is delivered to the engine through the outlet pipe 120. This design of multi-stage filtration and multiple noise reduction enables the air filter to have excellent filtration effect and noise reduction performance.

[0037] The porous partition 420 is used to divide the sound absorption cavity. The porous partition 420 and the sound absorption cavity can eliminate or reduce the noise at the target frequency and reduce noise radiation. This design not only reduces the airflow resonance noise caused by the long intake pipe in the high-position intake, but also effectively eliminates the noise at a specific frequency band generated on the flow channel.

[0038] By dividing the interior of the air filter into multiple chambers, the present invention has the ability of multi-stage filtration and multiple noise reduction. Under the condition of ensuring the pre-defined flow rate-pressure drop characteristic curve, the volume and position distribution of the chambers can be adjusted as needed to achieve continuous and stable air intake. This design enables the air filter to adapt to different engine air intake requirements and working environments, and improves the adaptability and reliability of the air filter.

[0039] In addition, since no extra resonance cavity is introduced to occupy space and only the air intake mode of the existing high-position intake structure is adjusted, the air filter of the present invention is convenient to be arranged in a compact small-displacement motorcycle. At the same time, the risk of the filter element 310 failing due to inhaled rainwater is reduced, and the use reliability is improved.

[0040] Refer to Figure 3 and Figure 4 , in some embodiments of the present application, the guide bracket 400 is designed with two porous partitions 420, and the edges of the two porous partitions 420 are on the inner wall of the upper shell 200, thereby forming two sound absorption cavities, namely the first sound absorption cavity 402 and the second sound absorption cavity 403, which are distributed on both sides of the main flow channel cavity 401. The two sound absorption cavities are used to help eliminate the noise of air flow and reduce noise propagation.

[0041] Furthermore, the volume of the second sound absorption cavity 403 is set to be larger than that of the first sound absorption cavity 402, which can specifically eliminate the noise at two frequencies.

[0042] Refer to Figure 2, in some embodiments of the present application, the filter element support 300, as an important component for supporting the filter element 310 and guiding the air flow, is designed to have three grooves 302, and the three grooves 302 respectively correspond to the positions of the first sound absorption cavity 402, the main flow channel cavity 401, and the second sound absorption cavity 403. When air enters the three grooves 302 and has a short stay, it is conducive to leaving large particle dust, water droplets, etc., reducing the contamination of the filter element 310. Moreover, the three grooves 302 function as resonance cavities to help reduce noise.

[0043] Referring to Figures 2 to 4 , the support intake pipe 430, as a channel for guiding air into the pre-filter intake cavity 301, is made of a soft material such as a rubber tube or a silicone tube, which has good flexibility and corrosion resistance, and plays a role in restricting the air flow, weakening the vibration, and locally pre-filtering dust and water droplets. The support intake pipe 430 is designed to extend above the middle part of the filter element 310. Such a layout ensures that the air can be evenly distributed before entering the filter element 310, avoiding the risks of local overload and early blockage, and improving the filtering efficiency and service life of the filter element 310.

[0044] Furthermore, an installation plate 431 is provided on the outer wall of the support intake pipe 430. The installation plate 431 is made of a light metal or plastic, and its edge is designed with a card slot. The U-shaped plate 410 is designed with a notch 411 to allow the support intake pipe 430 to pass through, and the U-shaped plate 410 is tightly connected to the installation plate 431 by inserting into the card slot to prevent air leakage. This not only simplifies the assembly steps, reduces the installation time, but also ensures the stability and safety of the support intake pipe 430 during long-term use.

[0045] Refer to Figure 2 , in some embodiments of the present application, the filter element support 300 is designed to cover the pre-intake cavity 101, and the through holes 303 provided on the filter element support 300 enable the pre-intake cavity 101 to communicate with the main flow channel cavity 401. The through holes 303 can not only ensure a sufficient air flow through amount, but also effectively block larger particulate matters and water droplets from entering the main flow channel cavity 401.

[0046] Referring to Figure 2 and Figure 3 , drain holes 201 are provided on the upper housing 200 and / or the lower housing 100. According to the usage state of the air filter, the drain holes 201 are located at the bottom of the air filter to facilitate the rapid drainage of accumulated water. At the same time, small holes 304 are also provided on the filter element support 300. The small holes 304 are located on the same side of the filter element support 300 as the drain holes 201 and are connected to the pre-intake cavity 101 to facilitate draining the accumulated water in the pre-intake cavity 101.

[0047] It is understandable that, in order to achieve a firm and reliable installation, mounting grooves 103 are provided on the opposite end faces of the lower housing 100 and the upper housing 200. The shape and size of the mounting grooves 103 match the positioning flanges 305 at the edge of the filter element bracket 300. As a part of the filter element bracket 300, the positioning flanges 305 are designed to consider both the convenience of installation and ensure the stability and sealing performance of the filter element bracket 300 after installation.

[0048] During the installation process, the positioning flanges 305 of the filter element bracket 300 are accurately inserted into the mounting grooves 103 of the upper housing 200 and the lower housing 100, and then the upper housing 200 and the lower housing 100 are fixedly connected by fasteners (such as bolts, rivets, buckles, etc.) to clamp the filter element bracket 300, achieving installation fixation and sealing. This not only simplifies the assembly steps but also ensures the stability and reliability of the filter element bracket 300 during long-term use.

[0049] An embodiment of the second aspect of the present application provides a motorcycle. The motorcycle adopts the air filter of the embodiment of the first aspect, including all the technical solutions of the air filter, and has all the technical solutions of the air filter, which will not be elaborated one by one.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. An air filter, characterized in that: include: A lower shell body, wherein the lower shell body is connected with a high-position air inlet pipe and an air outlet pipe, an inner partition is arranged in the inner cavity of the lower shell body to form a pre-air inlet cavity and an air outlet cavity, the high-position air inlet pipe is connected with the pre-air inlet cavity, and the air outlet pipe is connected with the air outlet cavity; An upper shell body connected to the upper end surface of the lower shell body; A filter element support, arranged between the lower shell and the upper shell, a filter element is arranged on the filter element support, and the filter element is located in the air outlet cavity; The guide bracket is located in the inner cavity of the upper shell body, and the guide bracket includes a U-shaped plate and a porous partition. The porous partition is vertically distributed on the convex surface of the U-shaped plate. The edges of the U-shaped plate and the porous partition abut the inner wall of the upper shell body to form a silencer cavity and a main channel cavity. The main channel cavity is connected to the pre-intake cavity. The concave cover of the U-shaped plate is arranged above the filter element to form a pre-filtration intake cavity. A bracket intake pipe is arranged on the U-shaped plate to connect the main channel cavity and the pre-filtration intake cavity.

2. The air filter according to claim 1, characterized in that: The guide bracket has two porous partitions, the edges of which abut against the inner wall of the upper shell, and the silencer cavity includes a first silencer cavity and a second silencer cavity, which are distributed on both sides of the main channel cavity.

3. The air filter according to claim 2, characterized in that: The volume of the first silencing chamber is smaller than the volume of the second silencing chamber.

4. The air filter according to claim 2 or 3, characterized in that: The filter element support is provided with three grooves, which respectively correspond to the first silencing cavity, the main channel cavity and the second silencing cavity.

5. The air filter according to claim 1, characterized in that: The support air inlet pipe is a soft pipe, and the support air inlet pipe extends to the upper middle part of the filter element.

6. The air filter according to claim 1 or 5, characterized in that: The outer wall of the bracket air inlet pipe is provided with a mounting plate, the edge of the mounting plate is provided with a slot, the end of the U-shaped plate is provided with a notch, the bracket air inlet pipe passes through the notch, and the U-shaped plate is inserted into the slot.

7. The air filter according to claim 1, characterized in that: The filter element support covers the pre-intake cavity, and the filter element support is provided with a through hole to connect the pre-intake cavity and the main flow channel cavity.

8. The air filter according to claim 7, characterized in that: The upper shell and / or the lower shell is provided with a drainage hole, the filter element bracket is provided with a small hole, the small hole is connected to the pre-intake cavity, and the small hole and the drainage hole are located on the same side of the filter element bracket.

9. The air filter according to claim 1, characterized in that: The opposite end surfaces of the lower shell and the upper shell are both provided with mounting grooves, and the edge of the filter element bracket is provided with a positioning flange, and the positioning flange is installed in the mounting groove.

10. A motorcycle, characterized in that Comprising the air filter according to any one of claims 1 to 9.

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