An exhaust plug with flow limiting function

Abstract

This invention relates to an exhaust plug with a flow-limiting function. The exhaust plug includes a fixed connector, an exhaust quick connector, and a flow-limiting valve assembly. The fixed connector body has a first channel, a receiving cavity, and a second channel connected in sequence. The exhaust quick connector body has a third channel and a fourth channel connected in sequence. The flow-limiting valve assembly includes a partition plate, a connecting rod penetrating the partition plate, a valve body connected to one end of the connecting rod, and a valve plate connected to the other end of the connecting rod. The partition plate is sandwiched between the end of the exhaust quick connector body and the fixed connector body, thereby separating the receiving cavity and the third channel. The connecting rod penetrates the valve hole, and the inner diameter of the valve hole is larger than the outer diameter of the connecting rod, thus forming a flow annular channel. Compared with the prior art, this invention limits the gas discharge speed and eliminates noise while achieving gas discharge, and has a simple structure and stable performance.

Description

Technical Field

[0001] This invention relates to an exhaust plug, and more particularly to an exhaust plug with a flow-limiting function. Background Technology

[0002] Various exhaust plugs with noise reduction functions are widely used in the exhaust structure of engines of various power machinery.

[0003] The automotive exhaust system primarily discharges the exhaust gases produced by the engine, while simultaneously reducing pollution and noise. Automotive exhaust systems are mainly used in light vehicles, minivans, buses, motorcycles, and other motor vehicles. In existing technologies, reducing noise from the sound source requires first understanding the mechanism and patterns of noise generation. Then, it can be achieved through improvements in machine design, the adoption of advanced processes to reduce the excitation force that generates noise, decrease the response of the sound-generating components in the system to this force, and improve machining and assembly precision.

[0004] The commonly used approach in the current technology is the concept and technology of exhaust pipe modification, which strictly controls every aspect of the modification process and controls the exhaust flow rate to achieve noise control and exhaust volume regulation. However, the current technology usually uses a regulating valve with a spring for improvement, because the spring structure is prone to failure in high temperature environments, leading to exhaust structure failure. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art by providing an exhaust plug with a flow-limiting function, which limits the exhaust speed and eliminates noise while achieving gas discharge. It also has a simple structure and stable performance.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] The purpose of this invention is to provide an exhaust plug with a flow-limiting function. The exhaust plug is connected to the engine exhaust port and includes a fixed connector, an exhaust quick connector, and a flow-limiting valve assembly. Specifically:

[0008] A fixed connector, the fixed connector comprising a fixed connector body, wherein the fixed connector body is provided with a first channel, a receiving cavity and a second channel connected in sequence;

[0009] An exhaust quick connector includes an exhaust quick connector body, in which a third channel and a fourth channel are sequentially connected. One end of the exhaust quick connector body corresponding to the third channel is inserted into the second channel to form an interference fit structure.

[0010] A flow restrictor valve assembly includes a partition, a connecting rod passing through the partition, a valve body connected to one end of the connecting rod, and a valve plate connected to the other end of the connecting rod. The partition is sandwiched between the end of the exhaust quick connector body and the fixed connector body, thereby separating the accommodating cavity and the third channel. A valve hole is provided in the middle of the partition, and the connecting rod passes through the valve hole, such that the inner diameter of the valve hole is larger than the outer diameter of the connecting rod, thereby forming a flow annular channel.

[0011] Furthermore, the valve body is shaped as a sphere, a portion of a sphere, a cone, or a cylinder.

[0012] Furthermore, the valve body is made of metal.

[0013] Furthermore, the valve body can fall under gravity in its natural state, thereby causing the valve plate to press against the partition plate, thus maximizing the cross-section of the annular channel.

[0014] Furthermore, when the valve body is impacted by engine exhaust, it can partially or completely press against the partition plate, causing the cross-section of the annular gap channel to be smaller than the maximum value.

[0015] Furthermore, the width of the valve plate is greater than the inner diameter of the valve hole.

[0016] Furthermore, the exhaust quick connector body has an annular flange in the middle, and the annular flange abuts against the end of the fixed connector body.

[0017] Furthermore, the diameter of the third channel gradually decreases from the end closest to the partition.

[0018] Furthermore, the diameter of the second channel is larger than the diameter of the accommodating cavity.

[0019] Furthermore, the exhaust quick connector body has an annular protrusion at the end away from the partition plate, and the annular protrusion forms an interference fit with the exhaust pipe;

[0020] The fixed connector body has an external thread at the end away from the partition, so that the fixed connector body is screwed onto the engine exhaust port.

[0021] Compared with the prior art, the present invention has the following technical advantages:

[0022] 1) While achieving gas discharge, the gas discharge speed is limited, noise is eliminated, and the structure is simple and the performance is stable, avoiding the failure of spring structures in high-temperature environments.

[0023] 2) Through a uniquely designed exhaust method, namely a gravity-driven exhaust valve structure, the valve body can fall under gravity in its natural state, causing the valve plate to press against the partition, thus maximizing the cross-section of the annular gap channel. When the valve body is impacted by the engine exhaust, it can partially or completely press against the partition, making the cross-section of the annular gap channel smaller than the maximum value. When the cross-section of the annular gap channel reaches its minimum, it can slowly release pressure and exhaust, avoiding the huge noise caused by the instantaneous pressure release process. As the pressure decreases, the cross-section of the annular gap channel gradually increases, realizing a rapid exhaust process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the exhaust plug with flow-limiting function in this technical solution.

[0025] Figure 2 This is a schematic diagram of the flow limiting valve assembly in this technical solution;

[0026] Figure 3 This is a schematic diagram of the exhaust quick connector in this technical solution;

[0027] Figure 4 This is a schematic diagram of the fixed joint in this technical solution.

[0028] In the diagram: 1. Exhaust quick connector, 11. Exhaust quick connector body, 12. Third channel, 14. Annular flange, 15. Annular protrusion, 2. Flow restrictor assembly, 21. Valve body, 22. Partition plate, 23. Valve plate, 24. Connecting rod, 3. Fixed connector, 31. Fixed connector body, 32. First channel, 33. Receiving cavity. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0030] The exhaust plug with flow-limiting function in this invention is connected to the engine exhaust port. The exhaust plug includes a fixed connector 3, an exhaust quick connector 1, and a flow-limiting valve assembly 2, as detailed below. Figures 1 to 4 .

[0031] The fixed connector 3 includes a fixed connector body 31, in which a first channel 32, a receiving cavity 33, and a second channel are sequentially connected. The exhaust quick connector 3 includes an exhaust quick connector body 11, in which a third channel 12 and a fourth channel 13 are sequentially connected. One end of the exhaust quick connector body 11 corresponding to the third channel 12 is inserted into the second channel, thereby forming an interference fit structure.

[0032] The flow restrictor assembly 2 includes a partition 22, a connecting rod 24 passing through the partition 22, a valve body 21 connected to one end of the connecting rod 24, and a valve plate 23 connected to the other end of the connecting rod 24. The partition 22 is sandwiched between the end of the exhaust quick connector body 11 and the fixed connector body 31, so that the partition 22 separates the accommodating cavity 33 and the third channel 12. A valve hole is provided in the middle of the partition 22, and the connecting rod 24 passes through the valve hole, such that the inner diameter of the valve hole is larger than the outer diameter of the connecting rod 24, thereby forming a flow annular gap channel.

[0033] The valve body 21 is shaped like a sphere, a portion of a sphere, a cone, or a cylinder. The valve body 21 is made of metal. Under natural conditions, the valve body 21 can fall under gravity, thereby causing the valve plate 23 to press against the partition plate 22, maximizing the cross-section of the annular channel.

[0034] When subjected to the impact of engine exhaust, valve body 21 can partially or completely press against partition plate 22, causing the cross-section of the annular gap channel to be less than its maximum value. The width of valve plate 23 is greater than the inner diameter of valve hole. An annular flange 14 is provided in the middle of exhaust quick connector body 11, and the annular flange 14 abuts against the end of fixed connector body 31.

[0035] The diameter of the third channel 12 gradually decreases from the end closest to the partition 22, forming a narrowing structure. The diameter of the second channel is larger than the diameter of the receiving cavity 33, and the receiving cavity 33 should also have a large space to allow the valve body 21 to move under the action of airflow.

[0036] This technical solution employs a uniquely designed exhaust method, namely a gravity-driven exhaust valve structure. In its natural state, the valve body 21 can fall under gravity, causing the valve plate 23 to press against the partition plate 22, maximizing the cross-section of the annular gap channel. When impacted by engine exhaust, the valve body 21 can partially or completely press against the partition plate 22, reducing the annular gap channel cross-section to its maximum value. When the annular gap channel cross-section reaches its minimum, slow pressure release and exhaust can occur, avoiding the significant noise caused by instantaneous pressure release. As the pressure decreases, the annular gap channel cross-section gradually increases, achieving a rapid exhaust process. Therefore, it can be used with confidence even under high-pressure environments.

[0037] The exhaust quick connector body 11 has an annular protrusion 15 at the end away from the partition 22, and the annular protrusion 15 forms an interference fit with the exhaust pipe. The fixed connector body 31 has an external thread at the end away from the partition 22, so that the fixed connector body 31 is screwed onto the engine exhaust port. The exhaust plug with flow-limiting function in this technical solution can be used with commercially available exhaust catalytic converters to achieve noise reduction while treating exhaust gases.

[0038] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. An exhaust plug with a flow-limiting function, characterized in that, The exhaust plug is connected to the engine exhaust port, and the exhaust plug includes: The fixed connector (3) includes a fixed connector body (31), and the fixed connector body (31) is provided with a first channel (32), a receiving cavity (33) and a second channel connected in sequence. The exhaust quick connector (1) includes an exhaust quick connector body (11), in which a third channel (12) and a fourth channel (13) are connected in sequence. One end of the exhaust quick connector body (11) corresponding to the third channel (12) is inserted into the second channel to form an interference fit structure. The flow limiting valve assembly (2) includes a partition (22), a connecting rod (24) passing through the partition (22), a valve body (21) connected to one end of the connecting rod (24), and a valve plate (23) connected to the other end of the connecting rod (24). The partition (22) is sandwiched between the end of the exhaust quick connector body (11) and the fixed connector body (31), so that the partition (22) separates the accommodating cavity (33) and the third channel (12). The partition (22) has a valve hole in the middle, and the connecting rod (24) passes through the valve hole, and the inner diameter of the valve hole is larger than the outer diameter of the connecting rod (24), so as to form a flow annular gap channel. The valve body (21) can fall under gravity in its natural state, thereby causing the valve plate (23) to press against the partition plate (22) and maximizing the cross-section of the annular channel. When the valve body (21) is impacted by the engine exhaust, the valve body (21) can be partially or completely pressed against the partition plate (22), so that the cross section of the annular gap channel is less than the maximum value. The exhaust quick connector body (11) is provided with an annular flange (14) in the middle, and the annular flange (14) abuts against the end of the fixed connector body (31).

2. The exhaust plug with flow-limiting function according to claim 1, characterized in that, The valve body (21) is shaped as one of the following: sphere, part of a sphere, cone, or cylinder.

3. The exhaust plug with flow-limiting function according to claim 1, characterized in that, The valve body (21) is made of metal.

4. The exhaust plug with flow-limiting function according to claim 1, characterized in that, The width of the valve plate (23) is greater than the inner diameter of the valve hole.

5. The exhaust plug with flow-limiting function according to claim 1, characterized in that, The diameter of the third channel (12) gradually decreases from the end closest to the partition (22).

6. The exhaust plug with flow-limiting function according to claim 1, characterized in that, The diameter of the second channel is larger than the diameter of the accommodating cavity (33).

7. The exhaust plug with flow-limiting function according to claim 1, characterized in that, The exhaust quick connector body (11) has an annular protrusion (15) at one end away from the partition (22), and the annular protrusion (15) forms an interference fit with the exhaust pipe. The fixed connector body (31) has an external thread at one end away from the partition (22), so that the fixed connector body (31) is screwed onto the engine exhaust port.

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