Secondary air supply air filter noise reduction device and motorcycle

Abstract

The present application relates to a secondary air supply air filter noise reduction device and a motorcycle. The secondary air supply air filter noise reduction device comprises: an air filter, the air filter comprises a cavity and an air outlet pipe, the air outlet pipe is connected to the cavity, a connection port is provided on the wall of the air outlet pipe, and the air outlet pipe is used to connect to the engine; an air supply component, the air supply component comprises a vent pipe, one end of the vent pipe is connected to the air outlet pipe through the connection port, and the vent pipe is located outside the cavity. During operation, the air filter outlet pipe is used as a pressure-stabilizing expansion pipe connected in series on the air intake path of the secondary air supply system to form a pressure-stabilizing structure on the air intake path of the secondary air supply system, so as to achieve the effect of pressure stabilization and noise reduction of the secondary air supply system, without affecting the engine's working performance, and is conducive to reducing the abnormal airflow noise generated by the engine's secondary air supply system, and does not occupy the space of the entire vehicle, thereby reducing the difficulty of vehicle layout and the cost of modification.

Description

Technical Field

[0001] The present application relates to the technical field of motorcycle engines, and in particular to a secondary air supply air filter noise reduction device and a motorcycle. Background Art

[0002] With the advancement of motorcycle engine technology, if appropriate measures are not taken during the engine exhaust process, some of the incompletely burned combustible gases in the engine combustion chamber will be discharged into the atmosphere, becoming air pollutants. The secondary air supply system directs fresh air from the air filter into the exhaust pipe, adding more oxygen, allowing the high-temperature, incompletely burned combustible gases to fully undergo an oxidation reaction, producing carbon dioxide and water vapor, which have less atmospheric pollution. Due to the characteristics of engine exhaust, the exhaust process will produce continuously fluctuating exhaust pressure waves in the exhaust pipe.

[0003] Traditionally, the secondary air supply pipe connects directly to the clean chamber of the air filter, causing pressure fluctuations of a corresponding frequency inside the air filter, resulting in abnormal airflow noise. Currently, a pressure stabilization chamber is used to reduce pressure fluctuations. However, installing a separate pressure stabilization chamber between the clean chamber and the secondary air supply pipe increases the number of components and costs. Furthermore, the additional pressure stabilization chamber takes up additional space, making vehicle layout more difficult. Summary of the Invention

[0004] Based on this, it is necessary to provide a secondary air filter noise reduction device and a motorcycle to address the problem of high cost of the current air filter noise reduction method, which is conducive to reducing assembly and modification costs and improving the noise reduction effect of secondary air supply.

[0005] The technical solution is as follows: a secondary air supply air filter noise reduction device, the secondary air supply air filter noise reduction device includes: an air filter, the air filter includes a cavity and an outlet pipe, the outlet pipe is connected to the cavity, a connecting port is opened on the pipe wall of the outlet pipe, and the outlet pipe is used to connect to the engine; an air supply component, the air supply component includes a ventilation pipe, one end of the ventilation pipe is connected to the outlet pipe through the connecting port, and the ventilation pipe is located outside the cavity.

[0006] During the installation process of the above-mentioned secondary air supply air filter noise reduction device, the ventilation pipe is connected to the connection port on the pipe wall of the outlet pipe. During operation, the air filter outlet pipe is used as a pressure-stabilizing expansion pipe in series on the air intake path of the secondary air supply system, forming a pressure-stabilizing structure on the air intake path of the secondary air supply system, so as to achieve the effect of pressure stabilization and noise reduction of the secondary air supply system, without affecting the engine's working performance, and is conducive to reducing the abnormal airflow noise generated by the engine's secondary air supply system. It does not occupy space in the entire vehicle, reducing the difficulty of vehicle layout and modification costs.

[0007] In one embodiment, the air supply component further includes a first valve, and the first valve is openably and closably disposed on the ventilation pipe.

[0008] In one embodiment, there are at least two air outlet pipes, and at least two of the air outlet pipes are connected to the cavity. The secondary air supply air filter noise reduction device also includes a regulating valve, and the regulating valve can be set in an openable and closable manner on at least two of the air outlet pipes at the same time, so that the regulating valve can be opened or closed at the same time on at least two of the air outlet pipes.

[0009] In one embodiment, the regulating valve includes a valve body, a valve plate and a rotating shaft. The valve body is provided with at least two air passages, and the two ends of each air passage are respectively connected to the outlet pipe and the engine. There are at least two valve plates and both are connected to the rotating shaft. Each air passage corresponds to one valve plate.

[0010] In one embodiment, the regulating valve further includes a driving member, which is drivingly connected to the rotating shaft and is used to drive the rotating shaft to rotate.

[0011] In one embodiment, the air supply component further includes a one-way valve, which is disposed on the vent pipe, and the vent pipe is connected to the engine through the one-way valve. When the vent pipe discharges air to the engine, the one-way valve opens.

[0012] In one embodiment, the one-way valve is a one-way reed valve, and the one-way reed valve is connected between an end of the vent pipe away from the cavity and the engine.

[0013] In one embodiment, the air filter further includes a pressure stabilizing component and a pressure stabilizing tube. The pressure stabilizing component is located inside the cavity, and the pressure stabilizing component is connected to the wall of the air outlet pipe through the pressure stabilizing tube.

[0014] In one embodiment, the air filter is further provided with a connecting pipe, which is arranged on the wall of the connecting port, and the ventilation pipe is detachably connected to the connecting pipe to enable the ventilation pipe to communicate with the exhaust pipe.

[0015] In one embodiment, the air filter further includes an air inlet pipe and a filter element, the cavity is provided with a filter port, the filter element covers the filter port, and the air inlet pipe is communicated with the filter port.

[0016] A motorcycle comprises the secondary air supply air filter noise reduction device described in any one of the above.

[0017] During the installation of the motorcycle, the ventilation pipe is connected to the connection port on the pipe wall of the outlet pipe. During operation, the air filter outlet pipe serves as a pressure-stabilizing expansion pipe connected in series on the air intake path of the secondary air supply system, forming a pressure-stabilizing structure on the air intake path of the secondary air supply system, so as to achieve the effect of stabilizing the pressure and reducing the noise of the secondary air supply system, without affecting the working performance of the engine, and is conducive to reducing the abnormal airflow noise generated by the secondary air supply system of the engine, and does not occupy space in the entire vehicle, thereby reducing the difficulty of vehicle layout and modification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 Schematic diagram of the overall structure of the secondary air supply air filter noise reduction device described in one embodiment.

[0021] Figure 2 Schematic diagram of the structure of the regulating valve described in one embodiment.

[0022] Figure 3 Schematic diagram of the internal structure of the air filter described in one embodiment.

[0023] Description of reference numerals:

[0024] 100. Secondary air supply air filter noise reduction device; 110. Air filter; 111. Cavity; 112. Exhaust pipe; 113. Inlet pipe; 114. Filter element; 115. Pressure stabilizer; 120. Air supply assembly; 121. Breathing pipe; 122. First valve; 123. One-way valve; 130. Regulating valve; 131. Valve body; 132. Valve plate; 133. Rotating shaft; 200. Engine. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 cannot be understood as a limitation on this application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "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 described as being "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.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, 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 embodiment.

[0031] See also Figure 1 , Figure 1 The overall structural diagram of the secondary air supply air filter noise reduction device 100 described in one embodiment of the present application is shown. A secondary air supply air filter noise reduction device 100 provided in one embodiment of the present application comprises: an air filter 110 and an air supply assembly 120. The air filter 110 comprises a cavity 111 and an air outlet pipe 112. The air outlet pipe 112 is connected to the cavity 111. A connecting port is provided on the wall of the air outlet pipe 112. The air outlet pipe 112 is used to connect to the engine 200. The air supply assembly 120 comprises a vent pipe 121. One end of the vent pipe 121 is connected to the air outlet pipe 112 via a connecting port, and the vent pipe 121 is located outside the cavity 111.

[0032] During installation, the secondary air filter noise reduction device 100 is connected to the connection port on the wall of the outlet pipe 112. During operation, the outlet pipe 112 of the air filter 110 serves as a pressure-stabilizing expansion pipe connected in series on the air intake path of the secondary air system, forming a pressure-stabilizing structure on the air intake path of the secondary air system. This achieves the function of stabilizing the pressure and reducing the noise of the secondary air system without affecting the working performance of the engine 200, and is beneficial to reducing the abnormal airflow noise generated by the secondary air system of the engine 200. It does not occupy space in the entire vehicle, thereby reducing the difficulty of vehicle layout and the cost of modification.

[0033] See also Figure 3 , Figure 3A schematic diagram of the internal structure of the air filter 110 described in one embodiment of the present application is shown. In one embodiment, the air filter 110 further includes a pressure stabilizer 115 and a pressure-stabilizing tube. The pressure stabilizer 115 is located within the cavity 111 and communicates with the wall of the outlet pipe 112 via the pressure-stabilizing tube. Therefore, the pressure-stabilizing chamber can provide pressure stabilization for the outlet pipe 112 without occupying vehicle body space, reducing the difficulty of vehicle layout. Furthermore, the vent pipe 121 is directly connected to the outlet pipe 112 of the air filter 110, located outside the air filter 110. This allows the outlet pipe 112 to function as a series-connected pressure-stabilizing expansion conduit in the secondary air supply system's intake path. Simultaneously, the built-in pressure stabilizer 115 of the air filter 110 functions as a parallel-connected pressure-stabilizing chamber in the secondary air supply system's intake path, forming a series-parallel dual-pressure-stabilizing structure in the secondary air supply system's intake path, thereby achieving the goal of stabilizing and reducing noise in the secondary air supply system. It also serves as a resonant cavity connected in parallel with the secondary air supply system, providing voltage stabilization and noise reduction. This three-in-one solution eliminates the need for additional components, saving costs while not taking up additional space on the vehicle and increasing design freedom.

[0034] See also Figure 1 In one embodiment, the air replenishment component 120 further includes a first valve 122, which is openably and closably disposed on the vent pipe 121. In this way, the vent pipe 121 can be opened and closed automatically, thereby improving the control convenience during the secondary air replenishment.

[0035] Alternatively, the first valve 122 may be a pneumatic valve, a hydraulic valve, an electric valve, a solenoid valve, or other valve types.

[0036] Specifically, the first valve 122 is a solenoid valve. This provides simple control and strong stability. The on-board computer controls the switch to adjust the operating state of the secondary air supply system according to different operating conditions. This embodiment provides only one specific implementation of the first valve 122, but is not intended to be limiting.

[0037] In one embodiment, see Figure 1 There are at least two outlet pipes 112, both of which are in communication with the cavity 111. The secondary air supply air filter noise reduction device 100 also includes a regulating valve 130, which is simultaneously closable and disposed on the at least two outlet pipes 112, allowing the regulating valve 130 to be opened or closed simultaneously on the at least two outlet pipes 112. This allows the air filter 110 to be suitable for use with a two-cylinder or multi-cylinder engine 200, and the air output volume can be adjusted using the regulating valve 130.

[0038] See also Figure 2 , Figure 2The figure shows a schematic diagram of the structure of the regulating valve 130 described in one embodiment of the present application. In one embodiment, the regulating valve 130 includes a valve body 131, a valve plate 132, and a rotating shaft 133. The valve body 131 defines at least two air passages, each of which connects to the outlet pipe 112 and the engine 200 at both ends. There are at least two valve plates 132, each connected to the rotating shaft 133, with one valve plate 132 corresponding to each air passage. Thus, by controlling the rotation of the rotating shaft 133, the two air passages can be opened or closed simultaneously.

[0039] Optionally, the regulating valve 130 may be a pneumatic valve, a hydraulic valve, an electric valve, a solenoid valve, or other valve types.

[0040] Specifically, see Figure 1 and Figure 2 The regulating valve 130 further includes a driving member that is drivably connected to the rotating shaft 133 and is configured to rotate the rotating shaft 133. For example, the regulating valve 130 may be an electric regulating valve, and the driving member may be a motor. In this manner, the motor controls the rotation of the rotating shaft 133, thereby controlling the rotation of the valve plate 132 to switch the regulating valve 130 between open and closed positions and the degree of opening, thereby controlling the air output. This provides simple control and high reliability. This embodiment merely provides one specific implementation of the regulating valve 130, but is not intended to be limiting.

[0041] In one embodiment, see Figure 1 and Figure 2 The air supply assembly 120 further includes a one-way valve 123, which is disposed on the vent pipe 121 and connected to the engine 200 via the one-way valve 123. When the vent pipe 121 discharges air to the engine 200, the one-way valve 123 opens. Due to the exhaust characteristics of the engine 200, the exhaust process of the engine 200 generates fluctuating exhaust pressure waves in the engine exhaust pipe. When the pressure in the engine exhaust pipe falls below the pressure upstream of the one-way valve 123, the one-way valve 123 opens due to the negative pressure, allowing fresh air to enter the engine exhaust pipe from the clean chamber of the air filter 110 through the secondary air supply system. When the pressure in the engine exhaust pipe exceeds the pressure upstream of the one-way valve 123, the one-way valve 123 closes to prevent exhaust gas from flowing back into the air filter 110.

[0042] Specifically, see Figure 1 and Figure 2 The one-way valve 123 is a one-way reed valve, which is connected between the end of the vent pipe 121 away from the cavity 111 and the engine 200. In this way, the function of the one-way valve 123 is completed by the elastic deformation of the reed itself, with a simple structure, strong sealing, long service life and high stability.

[0043] In one embodiment, the air filter 110 is further provided with a connecting pipe (not shown in the figure), which is arranged on the wall of the connecting port. The vent pipe 121 is detachably connected to the connecting pipe so that the vent pipe 121 is connected to the outlet pipe 112. This facilitates the connection and removal of the vent pipe 121 from the outlet pipe 112, thereby improving the convenience of assembly and disassembly.

[0044] In one embodiment, see Figure 3 Air filter 110 also includes an intake pipe 113 and a filter element 114. A filter port is defined in cavity 111, and filter element 114 covers the filter port. The intake pipe 113 communicates with the filter port. This allows air to pass through the filter element 114 from the intake pipe 113 and into the cavity 111, eliminating the need to open the entire cavity 111. This facilitates installation and replacement of the filter element 114.

[0045] In one embodiment, a motorcycle (not shown) includes any one of the above-mentioned secondary air filter noise reduction devices 100 .

[0046] During installation of the motorcycle, the vent pipe 121 is connected to a connection port on the wall of the outlet pipe 112. During operation, the outlet pipe 112 of the air filter 110 serves as a pressure-stabilizing expansion pipe connected in series on the intake path of the secondary air supply system, forming a pressure-stabilizing structure on the intake path of the secondary air supply system. This achieves the function of stabilizing pressure and reducing noise of the secondary air supply system without affecting the working performance of the engine 200, and is beneficial for reducing abnormal airflow noise generated by the secondary air supply system of the engine 200. Furthermore, the system does not occupy space on the entire vehicle, thereby reducing the difficulty of vehicle layout and modification costs.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0048] The above-described embodiments merely represent several implementation methods of the present application. 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 a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A secondary air supply air filter noise reduction device, characterized in that: The secondary air supply air filter noise reduction device includes: An air filter, the air filter comprising a cavity and an air outlet pipe, the air outlet pipe being in communication with the cavity, a connecting port being provided on a wall of the air outlet pipe, and the air outlet pipe being used to connect to the engine; An air supply assembly, the air supply assembly comprising a vent pipe and a first valve, one end of the vent pipe being connected to the air outlet pipe through the connecting port, and the vent pipe being located outside the cavity, the air supply assembly further comprising the first valve being openably and closably disposed on the vent pipe; The air filter is further provided with a connecting pipe, which is arranged on the wall of the connecting port. The vent pipe is detachably connected to the connecting pipe so that the vent pipe is communicated with the air outlet pipe.

2. The secondary air supply air filter noise reduction device according to claim 1, characterized in that: The first valve is a solenoid valve.

3. The secondary air supply air filter noise reduction device according to claim 1, characterized in that: There are at least two air outlet pipes, and at least two of the air outlet pipes are connected to the cavity. The secondary air supply air filter noise reduction device also includes a regulating valve, and the regulating valve can be simultaneously opened and closed on at least two of the air outlet pipes so that the regulating valve can be opened or closed at the same time on at least two of the air outlet pipes.

4. The secondary air supply air filter noise reduction device according to claim 3, characterized in that: The regulating valve includes a valve body, a valve plate and a rotating shaft. The valve body is provided with at least two air passages. The two ends of each air passage are respectively connected to the outlet pipe and the engine. There are at least two valve plates and both are connected to the rotating shaft. Each air passage corresponds to one valve plate.

5. The secondary air supply air filter noise reduction device according to claim 4, characterized in that: The regulating valve further includes a driving member, which is drivingly connected to the rotating shaft and is used to drive the rotating shaft to rotate.

6. The secondary air supply air filter noise reduction device according to claim 1, characterized in that: The air supply component further includes a one-way valve, which is arranged on the vent pipe. The vent pipe is connected to the engine through the one-way valve. When the vent pipe discharges air to the engine, the one-way valve opens.

7. The secondary air supply air filter noise reduction device according to claim 6, characterized in that: The one-way valve is a one-way reed valve, and the one-way reed valve is connected between the end of the vent pipe away from the cavity and the engine.

8. The secondary air supply air filter noise reduction device according to claim 6, characterized in that: The air filter further includes a pressure stabilizing component and a pressure stabilizing tube. The pressure stabilizing component is located inside the cavity, and the pressure stabilizing component is connected to the pipe wall of the air outlet pipe through the pressure stabilizing tube.

9. The secondary air supply air filter noise reduction device according to any one of claims 1 to 8, characterized in that: The air filter further comprises an air intake pipe and a filter element. The cavity is provided with a filter port. The filter element covers the filter port. The air intake pipe is communicated with the filter port.

10. A motorcycle, characterized in that: The motorcycle includes the secondary air filter noise reduction device according to any one of claims 1 to 9.

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