An ABS valve assembly

Abstract

The utility model relates to an ABS valve assembly, wherein the ABS valve assembly at least comprises: a valve body provided with an air inlet, an air outlet and an exhaust section; and a silencer provided with a silencer cover detachably assembled on the exhaust section and flexible porous silencer cotton filled in the silencer cover and completely covering the cross section of the exhaust section perpendicular to the exhaust direction. The utility model can provide optimized noise reduction effect, has good maintainability and durability, and thus significantly improves the riding experience of passengers.

Description

Technical Field

[0001] This utility model relates to the field of ABS valves, and more particularly to an ABS valve assembly. Background Technology

[0002] Anti-lock Braking System (ABS) is a crucial active safety device in vehicles. During emergency braking, the ABS dynamically adjusts the braking pressure by monitoring the wheel speed, thereby preventing the wheels from locking up completely and maintaining the adhesion between the tires and the ground. This ensures the vehicle's steering ability and driving stability, and avoids dangerous loss of control situations such as skidding and fishtailing. Therefore, it is widely used in commercial vehicles, especially heavy-duty vehicles.

[0003] The ABS valve, as the actuator of the anti-lock braking system, is responsible for the high-frequency dynamic regulation of braking pressure. The ABS valve typically has three states: "pressure increase," "pressure holding," and "pressure reduction." In the "pressure reduction" state, to quickly reduce the braking force on wheels about to lock, the high-pressure compressed gas in the brake chamber is rapidly released into the external environment through the exhaust port. However, as the high-pressure compressed gas is ejected from the exhaust port in a very short time, it generates violent pressure pulsations and turbulence, resulting in significant noise. This noise reduces the acoustic comfort inside the cabin and can easily cause discomfort to the occupants. Summary of the Invention

[0004] Therefore, the purpose of this utility model is to propose an improved ABS valve assembly, which can provide optimized noise reduction effect, as well as good maintainability and durability, thereby significantly improving the passenger riding experience.

[0005] According to this utility model, an ABS valve assembly is provided, wherein the ABS valve assembly includes at least: - Valve body, the valve body having an air inlet, an air outlet, and an exhaust section; and - A muffler having a muffler cover detachably mounted on the exhaust section and flexible porous sound-absorbing cotton filling the muffler cover and completely covering the cross section of the exhaust section perpendicular to the exhaust direction.

[0006] In the ABS valve assembly according to this utility model, the muffler has flexible, porous sound-absorbing cotton filled in the muffler cover. This sound-absorbing cotton completely covers the cross-section of the exhaust section, ensuring that the discharged high-pressure compressed gas must pass through the porous sound-absorbing cotton before being released into the external environment. The main energy of the exhaust noise from the ABS valve assembly is concentrated in the mid-to-high frequency range, which is the area of ​​greatest sensitivity for the human ear. When sound waves enter the sound-absorbing cotton, their short wavelength allows them to easily penetrate the tiny pores. The sound waves force air to reciprocate through the tortuous channels of the porous structure of the sound-absorbing cotton. The air then experiences friction and viscosity against the microporous surfaces, converting the kinetic energy of the sound waves into heat energy, thereby reducing noise. Furthermore, the muffler cover is detachably mounted on the exhaust section of the valve body. When the sound-absorbing cotton becomes degraded or clogged due to exposure to oil, moisture, or impurities, it can be easily cleaned or replaced without replacing the entire muffler. This allows for cost-effective maintenance of the ABS valve assembly and extends its service life.

[0007] According to one exemplary embodiment, the muffler has an assembly section that mates with the exhaust section, the assembly section surrounding the exhaust section, wherein a fastening clamp is provided on the outer peripheral wall of the assembly section, the fastening clamp being configured to fasten the assembly section to the exhaust section.

[0008] According to an exemplary embodiment, the assembly section has a receiving groove on its outer peripheral wall, and the fastening clamp is partially embedded in the receiving groove; and / or, the fastening clamp has an interruption portion to achieve elastic deformation of the fastening clamp.

[0009] According to an exemplary embodiment, the exhaust section has a positioning protrusion on its outer peripheral wall, and the assembly section has a positioning recess on its inner peripheral wall corresponding to the positioning protrusion.

[0010] According to one exemplary embodiment, the silencing cover has a receiving section for accommodating the sound-absorbing cotton, and the assembly section is constructed radially outward relative to the receiving section such that a stop is formed between the assembly section and the receiving section, and the end of the exhaust section abuts against the stop.

[0011] According to one exemplary embodiment, the thickness of the sound-absorbing cotton along the exhaust direction is configured such that the sound-absorbing cotton is flush with or extends beyond the end of the assembly section.

[0012] According to one exemplary embodiment, the end of the exhaust section is provided with a guide ramp to guide the sound-absorbing cotton into the exhaust section.

[0013] According to an exemplary embodiment, an expansion chamber is provided upstream of the sound-absorbing cotton in the exhaust section, and the exhaust port of the valve body leads to the expansion chamber; and / or, a flow guide is provided upstream of the sound-absorbing cotton in the exhaust section, and the flow guide has a plurality of flow guide holes to divide the exhaust flow into a plurality of sub-flows.

[0014] According to one exemplary embodiment, the sound-absorbing cotton is hydrophobic; and / or, the sound-absorbing cotton is made of polyester fiber cotton or melamine foam.

[0015] According to one exemplary embodiment, the muffler has a plurality of spaced-apart tabs forming an exhaust gap between adjacent tabs, wherein reinforcing ribs are provided on the tabs. Attached Figure Description

[0016] The present invention will now be described in more detail with reference to the accompanying drawings, which will provide a better understanding of its principles, features, and advantages. The drawings include: Figure 1 A front view of an ABS valve assembly according to an exemplary embodiment of the present invention is shown; Figures 2a to 2c Partial cross-sectional views of ABS valve assemblies according to different exemplary embodiments of the present invention are shown. Detailed Implementation

[0017] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model. Here, for the sake of brevity, elements with the same reference numerals are indicated only once in the drawings.

[0018] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection, an indirect connection via an intermediate support plate, or a connection within two components. Those skilled in the art will understand the meaning of these terms in this disclosure as appropriate.

[0019] Figure 1 A front view of an ABS valve assembly 100 according to an exemplary embodiment of the present invention is shown. Here, the ABS valve assembly 100 is used particularly in anti-lock braking systems of commercial vehicles, such as heavy-duty trucks, and performs a pressure regulation function.

[0020] like Figure 1As shown, the ABS valve assembly 100 includes a valve body 10, which has an air inlet 11, an air outlet 12, and an exhaust section 13. The air inlet 11 is connected to the control air source of the braking system to receive braking command air pressure. The air outlet 12 is connected to the brake chamber of the target wheel to output controlled braking pressure. The exhaust section 13 is configured to discharge high-pressure compressed air to the external environment. The high-pressure compressed air mainly flows into the exhaust section 13 from the exhaust port 14 of the valve body 10. Here, the valve body 10 is made of materials such as aluminum alloy by casting or machining and integrates multiple gas flow channels and a diaphragm driven by a solenoid valve inside, through which the opening and closing of different gas flow channels can be realized. When the ABS valve assembly 100 is activated, its operating states include three states: "pressure boosting," "pressure holding," and "pressure depressurization." In the pressure boosting state, the intake diaphragm is open and the exhaust diaphragm is closed. Compressed air from the intake port 11 passes through the valve body 10 and is output to the brake chamber from the outlet port 12, thereby driving the brake actuator to generate braking force, while the exhaust section 13 is completely closed. In the pressure holding state, both the intake and exhaust diaphragms are closed, sealing the intake port 11 and the exhaust section 13. The outlet port 12 and the brake chamber form a closed space, maintaining a constant braking pressure. In the pressure depressurization state, the intake diaphragm is closed, while the exhaust diaphragm is open, allowing the high-pressure compressed air in the brake chamber to enter the exhaust section 13 through the outlet port 12 and be released into the external environment through the exhaust section 13, thereby rapidly reducing the braking pressure and allowing the locked wheels to rotate again. For the sake of simplicity, the internal flow channels and diaphragms of the valve body 10 are not shown here.

[0021] like Figure 1 As shown, the ABS valve assembly 100 includes a muffler 20, which is mounted on the exhaust section 13 of the valve body 10. In the depressurization state, high-pressure compressed air from the brake chamber is rapidly ejected from the exhaust section 13 along the exhaust direction L. The high-pressure potential energy stored in the high-pressure compressed air is converted into intense aerodynamic kinetic energy and acoustic energy in a very short time, thereby generating pulsed aerodynamic noise. The muffler 20 mounted on the exhaust section 13 can effectively reduce or eliminate the generated noise. The muffler 20 is described in detail below with reference to different embodiments.

[0022] Figures 2a to 2c Partial cross-sectional views of the ABS valve assembly 100 according to different exemplary embodiments of the present invention are shown. Here, only the exhaust section 13 and the muffler 20 of the ABS valve assembly 100 are shown in cross-section, while other parts remain unsectioned.

[0023] like Figures 2a to 2cAs shown, the muffler 20 has a muffler cover 21 detachably mounted on the exhaust section 13 and a flexible, porous sound-absorbing cotton 22. The sound-absorbing cotton fills the muffler cover 21 and completely covers the cross-section of the exhaust section 13 perpendicular to the exhaust direction L, so that the compressed air entering the exhaust section 13 must pass through the sound-absorbing cotton 22 before being discharged to the external environment. Here, the sound-absorbing cotton 22 has a three-dimensional fiber mesh and microporous structure. When a high-pressure airflow carrying air kinetic energy and sound energy enters the sound-absorbing cotton 22, the sound waves are guided into the fiber mesh and microporous structure. The air and the fiber surface generate intense friction and viscous resistance, so that the kinetic energy of the sound wave vibration is continuously converted into heat energy and dissipated, thereby achieving resistive noise reduction. In particular, mid-to-high frequency sound waves are easily absorbed by the tiny pores of the sound-absorbing cotton 22, thereby achieving an optimized noise reduction effect. In addition, the muffler 20 of the ABS valve assembly 100 is inevitably exposed to a humid and oily environment for a long time, and the sound-absorbing cotton 22 may experience performance degradation or blockage. By detachably mounting the muffler 21 onto the exhaust section 13, the muffler 21 and the sound-absorbing cotton 22 can be easily removed from the exhaust section 13, and the sound-absorbing cotton 22 can be cleaned or replaced without replacing the entire muffler. This significantly reduces the maintenance difficulty and cost of the ABS valve assembly 100.

[0024] For example, the sound-absorbing cotton 22 is hydrophobic, which ensures that the sound-absorbing cotton 22 is not easily soaked by water in a humid environment, thereby effectively avoiding problems such as decreased sound-absorbing performance, material caking, pore blockage, and increased weight caused by water absorption. This significantly extends the service life and maintenance cycle of the muffler 20. Here, the sound-absorbing cotton 22 can be made of, for example, polyester fiber cotton or melamine foam, especially after hydrophobic treatment. Of course, other materials that those skilled in the art may consider are also acceptable.

[0025] like Figures 2a to 2c As shown, the muffler 21 has an assembly section 23 that mates with the exhaust section 13. The assembly section at least partially overlaps with and surrounds the exhaust section 13. A fastening clamp 24 is provided on the outer peripheral wall of the assembly section 23. This fastening clamp is configured to secure the assembly section 23 to the exhaust section 13 by applying an elastic clamping force to the assembly section 23. This elastic clamping force generates friction between the inner peripheral wall of the assembly section 23 and the outer peripheral wall of the exhaust section 13. This friction prevents relative movement between the assembly section 23 and the exhaust section 13, thereby achieving a secure assembly of the muffler 21 onto the exhaust section 13. The muffler 21 can be easily disassembled by removing the fastening clamp 24. This allows for simple and tool-free assembly and disassembly of the muffler 20.

[0026] For example, such as Figures 2a to 2cAs shown, the assembly section 23 has a surrounding receiving groove 241 on its outer peripheral wall. This receiving groove, for example, has a semi-circular cross-section, and the fastening clamp 24 is partially embedded in it. This prevents displacement of the fastening clamp 24 during assembly and prevents it from unintentionally falling off the assembly section 23, thus ensuring that the assembly section 23 is always securely fastened to the exhaust section 13. In particular, as... Figure 1 As shown, the fastening clamp 24 has an interruption portion 242, which allows for elastic deformation of the fastening clamp 24, thereby allowing the fastening clamp 24 to be more easily fitted into the receiving groove 241 of the assembly section 23.

[0027] For example, such as Figures 2a to 2c As shown, the exhaust section 13 has a positioning protrusion 131 on its outer peripheral wall, while the assembly section 23 has a positioning recess 231 on its inner peripheral wall corresponding to the positioning protrusion 131. When in the assembly state, the positioning protrusion 131 is embedded in the positioning recess 231, thereby achieving precise positioning of the assembly section 23 on the exhaust section 13 and preventing undesirable displacement of the assembly section 23 relative to the exhaust section 13. Furthermore, the positioning protrusion 131 can be elastically deformable, allowing the assembly section 23 to be fitted onto the exhaust section 13 without obstruction.

[0028] For example, such as Figures 2a to 2c As shown, the muffler 21 has a receiving section 25 for receiving sound-absorbing cotton 22. The receiving section is constructed in a hollow cylindrical shape and its inner diameter substantially corresponds to the inner diameter of the exhaust section 13, so that the sound-absorbing cotton 22 in the receiving section 25 can be inserted into the exhaust section 13. The assembly section 23 is constructed radially outward relative to the receiving section 25, such that the inner diameter of the assembly section 23 corresponds to the outer diameter of the exhaust section 13. A stop 26 is formed between the assembly section 23 and the receiving section 25, and the end of the exhaust section 13 facing the muffler 21 abuts against the stop, thereby enabling precise positioning of the assembly section 23 on the exhaust section 13 during the assembly process.

[0029] For example, such as Figure 2a As shown, an expansion chamber 15 is provided upstream of the sound-absorbing cotton 22 in the exhaust section 13. The exhaust port 14 of the valve body 10 leads to the expansion chamber, so that the high-pressure compressed gas is ejected from the narrow exhaust port 14 and immediately enters the expansion chamber 15 with a significantly increased cross-section. This utilizes the reflection, interference and expansion deceleration effects of sound waves at the abrupt change in cross-section to consume sound energy and reduce pressure fluctuations. This can significantly reduce the pressure and velocity of the airflow output to the downstream sound-absorbing cotton 22. The expansion chamber 15 and the sound-absorbing cotton 22 can jointly form a composite noise reduction system, which can significantly improve the noise reduction effect and achieve optimized noise reduction across the entire frequency band.

[0030] For example, such as Figure 2b As shown, a conical flow guide shroud 16 is provided upstream of the sound-absorbing cotton 22 in the exhaust section 13. The flow guide shroud has multiple flow guide holes 161. The flow guide shroud 16 can guide and diffuse the concentrated high-pressure compressed airflow, preventing the airflow from directly impacting the sound-absorbing cotton 22 and effectively eliminating the mid-to-low frequency pulsating energy in the airflow. The flow guide holes 161 transform the airflow into smooth, dispersed multiple fine airflows. These fine airflows further flow through the sound-absorbing cotton 22, which has a sorting effect on the airflow and reduces some low-frequency noise. The flow guide shroud 16 and the sound-absorbing cotton 22 can also form a composite silencing system, which can significantly improve the silencing effect and achieve optimized noise reduction across the entire frequency range.

[0031] For example, such as Figure 2c As shown, the thickness of the sound-absorbing cotton 22 along the exhaust direction L, or axial direction, is configured such that the sound-absorbing cotton 22 is flush with or extends beyond the end of the assembly section 23. This increases the thickness of the sound-absorbing cotton 22 to some extent and allows the sound-absorbing cotton 22 to be partially inserted into the exhaust section 13, with the thickness of the inserted portion corresponding to or greater than the axial extension of the assembly section 23. This allows mid-to-high frequency sound waves to penetrate deep into the sound-absorbing cotton 22 and be continuously consumed over a longer propagation path, thus optimizing the sound-absorbing performance of the sound-absorbing cotton 22, especially for mid-to-high frequency noise. Furthermore, it is also possible to reduce the overall size of the ABS valve assembly 100 by decreasing the extension of the exhaust section 13 along the exhaust direction L and / or by increasing the insertion size of the assembly section 23 on the exhaust section 13, thereby achieving a compact configuration of the ABS valve assembly 100.

[0032] For example, such as Figures 2a to 2c As shown, the end of the exhaust section 13 facing the muffler 20 is provided with a guide slope 132. The guide slope is provided on the inner peripheral wall of the muffler 20 and is constructed to gradually expand outward toward the opening, so as to guide the sound-absorbing cotton 22 into the exhaust section 13 and prevent the sound-absorbing cotton 22 from being squeezed at the opening of the exhaust section 13.

[0033] For example, such as Figure 1As shown, the silencer 21 has multiple spaced-apart tabs 271 that together form a receiving section 25 for accommodating the sound-absorbing cotton 22. An exhaust gap 272 is formed between adjacent tabs 271, allowing airflow through the sound-absorbing cotton 22 to be released into the external environment. Reinforcing ribs 273 are provided on each tab 271 to effectively increase its support strength and prevent undesirable deformation of the silencer 271. A porous structure is provided at the bottom of the silencer 21, which increases the airflow exhaust area while eliminating low- and mid-frequency noise.

[0034] The foregoing description of the embodiments is limited to the framework of the examples described herein. Of course, the various features of the embodiments can be freely combined with each other without departing from the framework of this invention, as long as it is technically meaningful.

[0035] Other advantages and alternative embodiments of this invention will be apparent to those skilled in the art. Therefore, this invention is not, in its broader sense, limited to the specific details, representative structures, and exemplary embodiments shown and described. Rather, those skilled in the art can make various modifications and substitutions without departing from the basic spirit and scope of this invention.

Claims

1. An ABS valve assembly (100), characterized in that, The ABS valve assembly (100) includes at least: - Valve body (10), the valve body (10) being provided with an air inlet (11), an air outlet (12), and an exhaust section (13); and - Muffler (20), the muffler (20) having a muffler cover (21) detachably mounted on the exhaust section (13) and a flexible porous sound-absorbing cotton (22) that fills the muffler cover (21) and completely covers the cross section of the exhaust section (13) perpendicular to the exhaust direction (L).

2. The ABS valve assembly (100) according to claim 1, characterized in that, The muffler (21) has an assembly section (23) that mates with the exhaust section (13), the assembly section (23) surrounding the exhaust section (13), wherein a fastening clamp (24) is provided on the outer peripheral wall of the assembly section (23), the fastening clamp (24) being configured to fasten the assembly section (23) to the exhaust section (13).

3. The ABS valve assembly (100) according to claim 2, characterized in that, The assembly section (23) has a receiving groove (241) on its outer peripheral wall, and the fastening clamp (24) is partially embedded in the receiving groove (241); and / or The fastening clamp (24) has an interruption (242) to achieve elastic deformation of the fastening clamp (24).

4. The ABS valve assembly (100) according to claim 2 or 3, characterized in that, The exhaust section (13) has a positioning protrusion (131) on its outer peripheral wall, and the assembly section (23) has a positioning recess (231) on its inner peripheral wall that corresponds to the positioning protrusion (131).

5. The ABS valve assembly (100) according to claim 2 or 3, characterized in that, The muffler (21) has a receiving section (25) for receiving the sound-absorbing cotton (22), and the assembly section (23) is constructed radially outward relative to the receiving section (25) such that a stop (26) is formed between the assembly section (23) and the receiving section (25), and the end of the exhaust section (13) abuts against the stop (26).

6. The ABS valve assembly (100) according to claim 2 or 3, characterized in that, The sound-absorbing cotton (22) is configured such that its thickness along the exhaust direction (L) is flush with or extends beyond the end of the assembly section (23).

7. The ABS valve assembly (100) according to any one of claims 1 to 3, characterized in that, The exhaust section (13) is provided with a guide ramp (132) at its end to guide the sound-absorbing cotton (22) into the exhaust section (13).

8. The ABS valve assembly (100) according to any one of claims 1 to 3, characterized in that, An expansion chamber (15) is provided upstream of the sound-absorbing cotton (22) in the exhaust section (13), and the exhaust port (14) of the valve body (10) leads to the expansion chamber (15); and / or In the exhaust section (13), a conical flow guide (16) is provided upstream of the sound-absorbing cotton (22), and the flow guide is provided with multiple flow guide holes (161).

9. The ABS valve assembly (100) according to any one of claims 1 to 3, characterized in that, The sound-absorbing cotton (22) is hydrophobic; and / or The sound-absorbing cotton (22) is made of polyester fiber cotton or melamine foam.

10. The ABS valve assembly (100) according to any one of claims 1 to 3, characterized in that, The muffler (21) has a plurality of spaced-apart tabs (271) forming an exhaust gap (272) between adjacent tabs (271), wherein reinforcing ribs (273) are provided on the tabs (271).

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