A large displacement motorcycle muffler

Abstract

The present invention provides a large-displacement motorcycle muffler, comprising a front connection component, an outer cylinder and a tail connection component connected in sequence; further comprising a muffler component arranged in the outer cylinder; the muffler component comprises a porous mesh cylinder, a supporting partition, a porous tube, a muffler partition and at least two porous flat tubes; the supporting partition and the muffler partition divide the inner cavity of the outer cylinder into a first muffler cavity and a second muffler cavity; the porous tube is inserted through a connecting pipe on the supporting partition and is located in the first muffler cavity; the porous flat tube is inserted through the muffler partition and is located in the second muffler cavity, and the porous flat tube connects the first muffler cavity and the second muffler cavity; one end of the tail connection component extends into the second muffler cavity, and the other end is arranged outside the outer cylinder as an exhaust end; the porous mesh cylinder is arranged on the inner wall of the outer cylinder and fixed by the supporting partition. The present invention has a reasonable structural design, good muffler effect and excellent muffler performance, can reduce the noise pollution caused by motorcycles, and is particularly conducive to the use and promotion of large-displacement motorcycles.

Description

Technical Field

[0001] The invention relates to a mechanical muffler device, and more particularly to a large-displacement motorcycle muffler. Background Art

[0002] The muffler is a transition device connecting the engine and the atmosphere. Its function is to allow exhaust gas to pass through and attenuate noise, reducing the amount of exhaust pollutants. It is one of the important components of a motorcycle. It not only affects the noise and emissions of the motorcycle, but also has a significant impact on the engine's power, torque, fuel consumption and other performance.

[0003] The muffler is a device for reducing airflow noise. It is installed in the pipeline or on the inlet and outlet. It has a certain effect on reducing noise while the airflow passes through. Its performance mainly includes three aspects:

[0004] 1. Noise reduction performance, including the amount of noise reduction and spectrum characteristics;

[0005] Second, aerodynamic performance is usually expressed by the total pressure difference between the muffler inlet and outlet;

[0006] 3. Structural performance refers to its overall dimensions, strength, maintenance requirements, service life, etc.

[0007] The above three aspects of evaluating the performance of the muffler are both interrelated and mutually restrictive. From the perspective of the muffler's noise reduction performance, the greater the noise reduction within the required frequency range, the better; but at the same time, the requirements of aerodynamic performance must be considered.

[0008] Existing motorcycle mufflers generally have problems such as short buffer path, poor noise reduction effect and substandard exhaust treatment. The main reasons are insufficient internal space of the muffler, short buffer path and unreasonable structural design, resulting in unclear and unsatisfactory noise reduction effect. Summary of the invention

[0009] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and provide a large-displacement motorcycle muffler; the motorcycle muffler has a reasonable structural design, good muffler effect and excellent muffler performance, can reduce the noise pollution caused by motorcycles, and is particularly conducive to use and promotion in large-displacement motorcycles.

[0010] In order to achieve the above object, the present invention is implemented by the following technical scheme: a large-displacement motorcycle muffler, characterized in that it includes a front connection component, an outer cylinder and a rear connection component connected in sequence; and also includes a muffler component arranged in the outer cylinder; the muffler component includes a porous mesh cylinder, a supporting baffle for supporting the porous mesh cylinder, a porous tube, a muffler baffle and at least two porous flat tubes;

[0011] The supporting baffle and the silencer baffle divide the inner cavity of the outer cylinder into a first silencer cavity and a second silencer cavity; the porous tube is connected to the front connection component through a connecting pipe, and the porous tube is inserted on the supporting baffle through the connecting pipe and is located in the first silencer cavity; the porous flat tube is inserted on the silencer baffle and is located in the second silencer cavity, and the porous flat tube connects the first silencer cavity and the second silencer cavity; one end of the tail connection component extends into the second silencer cavity, and the other end is arranged outside the outer cylinder as an exhaust end; the porous mesh tube is arranged on the inner wall of the outer cylinder and fixed by the supporting baffle.

[0012] The wall of the porous mesh cylinder is provided with a plurality of groups of sound-absorbing holes; the plurality of groups of sound-absorbing holes are arranged along the length direction of the porous mesh cylinder.

[0013] The outer wall of the porous mesh tube is provided with a glass fiber layer for consuming sound energy. The sound waves flowing out of the porous mesh tube can consume the sound energy through the friction of the glass fiber layer, thereby further improving the sound elimination effect.

[0014] The wall of the porous tube is provided with a plurality of first muffler holes; the porous tube is arranged at the same height as the muffler hole group.

[0015] One end of the porous tube is connected to the front connection component through a connecting pipe, and the other end is provided with a plugging cover to form a blind end.

[0016] One end of the porous flat tube is connected to the first muffler cavity, and the other end is provided with a second plugging cover to form a blind end.

[0017] The multi-hole flat tubes are arranged obliquely from top to bottom. This design makes the sound elimination uniform, and the oblique design of the multi-hole flat tubes can further improve the sound elimination effect.

[0018] The tube wall of the porous flat tube is provided with a plurality of second sound-absorbing holes.

[0019] The front connection assembly comprises a front cone and a front pipe; the front cone is connected to the outer cylinder; one end of the front pipe serves as an air inlet, and the other end is connected to the porous pipe through a connecting pipe.

[0020] The tail connection assembly comprises a tail cover and a tail pipe; the tail cover is connected to the outer cylinder; one end of the tail pipe extends into the second muffler cavity, and the other end is arranged outside the outer cylinder as an exhaust end.

[0021] The exhaust muffler principle of the large-displacement motorcycle muffler of the present invention is as follows: the airflow and the sound wave enter from the front pipe and reach the inner cavity of the porous tube. At this time, the sound wave and the inner wall reflection of the porous tube will offset a part of the sound wave, and the remaining sound wave will diverge through the first muffler hole of the porous tube and flow into the first muffler cavity, and then most of the sound waves enter the glass fiber layer through the muffler hole group on the porous mesh tube. The sound waves entering the glass fiber layer consume the sound energy through the friction of the glass fiber layer. Another part of the sound wave enters the inner cavity of the porous flat tube, and is offset by the reflection of the inner wall of the porous flat tube, consuming part of the sound energy. The remaining sound wave flows into the second muffler cavity through the second muffler hole of the porous flat tube. Since the porous flat tube is arranged in parallel, the air molecules of some high-speed airflows collide with each other elastically, so that the movement direction of the airflow molecules becomes chaotic and no longer bundled, thereby losing part of the impact force. The sound wave also consumes part of the sound energy through continuous reflection interference. Part of the remaining sound waves are discharged through the tail pipe.

[0022] Among them, the airflow and sound waves discharged from the front pipe directly pass through the porous tube to the plug cover one and collide with each other at one place of the plug cover. The continuous pulsed airflow forms a relatively high air pressure at the blind end of the plug cover one. Through the completely elastic collision between molecules, between molecules and plug cover one, and between molecules and the tube wall, the molecular motion after the collision eventually changes from being directional to being chaotic, no longer having a flow direction, and no longer forming a bundle, and becoming impact-free, so that the collision between gas molecules will not produce metallic sound, that is, no regenerative noise and noise pollution. Similarly, the principle that the airflow and sound waves discharged from the porous tube directly pass through the porous flat tube to the plug cover two and perform silencing at the plug cover two is the same as above.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects: the large-displacement motorcycle muffler of the present invention has a reasonable structural design, good muffler effect and excellent muffler performance, can reduce the noise pollution caused by motorcycles, and is particularly conducive to use and promotion in large-displacement motorcycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an internal schematic diagram of a motorcycle muffler of the present invention;

[0025] Figure 2 It is a schematic diagram of the interior of a porous mesh cylinder in a motorcycle muffler of the present invention;

[0026] Figure 3 It is a schematic diagram of a muffler baffle in a motorcycle muffler of the present invention;

[0027] Among them, 1 is the front connecting pipe, 2 is the connecting sleeve, 3 is the front cone, 4 is the supporting baffle, 5 is the connecting pipe, 6 is the outer cylinder, 7 is the porous mesh cylinder, 8 is the porous tube, 9 is the plugging cover one, 10 is the porous flat tube, 11 is the silencer baffle, 12 is the plugging cover two, 13 is the first silencer chamber, 14 is the tail cover, 15 is the tail pipe, 16 is the second silencer chamber, and 17 is the silencer hole group. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Example

[0030] like Figures 1 to 3 As shown, the large-displacement motorcycle muffler of the present invention comprises a front connection assembly, an outer cylinder 6 and a rear connection assembly connected in sequence, and the muffler also comprises a muffler assembly arranged in the outer cylinder 6, and the muffler assembly comprises a porous mesh cylinder 7, a supporting baffle 4 for supporting the porous mesh cylinder 7, a porous pipe 8, a muffler baffle 11 and two porous flat pipes 10. Among them, the front connection assembly comprises a front cone 3 connected to the outer cylinder 6 and a front pipe 1 as an air inlet, and the rear connection assembly comprises a tail cover 14 connected to the outer cylinder 6 and a tail pipe 15 as an exhaust end.

[0031] The support baffle 4 and the silencer baffle 11 of the present invention divide the inner cavity of the outer cylinder 6 into a first silencer cavity 13 and a second silencer cavity 16. The porous tube 8 is connected to the front connecting pipe 1 through the connecting pipe 5 and the connecting sleeve 2. The porous tube 8 is inserted on the support baffle 4 through the connecting pipe 5 and is located in the first silencer cavity 13. The porous flat tube 10 is inserted on the silencer baffle 11 and is located in the second silencer cavity 16. The porous flat tube 10 connects the first silencer cavity 13 and the second silencer cavity 16, and one end of the tail pipe 15 extends into the second silencer cavity 16, and the other end is arranged outside the outer cylinder 6 as an exhaust end. The porous mesh tube 7 is arranged on the inner wall of the outer cylinder 6 and fixed by the support baffle 4.

[0032] Specifically, the wall of the porous mesh tube 7 is provided with a plurality of groups of muffler holes 17; the plurality of groups of muffler holes 17 are arranged along the length direction of the porous mesh tube 7. In order to further improve the muffler effect, a glass fiber layer for consuming sound energy is provided on the outer wall of the porous mesh tube 7. In the present invention, the sound waves flowing out of the porous mesh tube 7 can consume the sound energy through the friction of the glass fiber layer.

[0033] The wall of the porous tube 8 of the present invention is provided with a plurality of first muffler holes, one end of which is connected to the front pipe 1 through the connecting pipe 5 and the connecting sleeve 2, and the other end is provided with a plugging cover 9 to form a blind end. The porous tube 8 and the muffler hole group 17 are arranged at the same height.

[0034] One end of the porous flat tube 10 is connected to the first muffler chamber 13, and the other end is provided with a second plug cover 12 to form a blind end. In order to make the muffler uniform, the two porous flat tubes 2 are arranged obliquely from top to bottom, and the tube wall of the porous flat tube 2 is provided with a plurality of second muffler holes.

[0035] The exhaust muffler principle of the large-displacement motorcycle muffler of the present invention is as follows: the airflow and sound waves enter from the front pipe 1 and reach the inner cavity of the porous tube 8. At this time, the sound waves and the inner wall reflection of the porous tube 8 will offset a part of the sound waves, and the remaining sound waves will diverge through the first muffler hole of the porous tube 8 and flow into the first muffler cavity 13. Then most of the sound waves enter the glass fiber layer through the muffler hole group 17 on the porous mesh tube 7. The sound waves entering the glass fiber layer consume the sound energy through the friction of the glass fiber layer. Another part of the sound waves enters the inner cavity of the porous flat tube 10, and is offset by the inner wall reflection of the porous flat tube 10, consuming part of the sound energy. The remaining sound waves flow into the second muffler cavity 17 through the second muffler hole of the porous flat tube 10. Since the porous flat tube 10 is arranged in two pieces tilted and side by side, the air molecules of some high-speed airflows collide with each other elastically, so that the movement direction of the airflow molecules becomes chaotic and no longer bundled, thereby losing part of the impact force. The sound waves also consume part of the sound energy through continuous reflection interference. The remaining sound waves are partially discharged through the tail pipe 15 .

[0036] Among them, the airflow and sound waves discharged from the front pipe 1 directly pass through the porous tube 8 to the plugging cover 1 9 and collide with each other at the plugging cover 1 9. The continuous pulsed airflow forms a relatively high air pressure at the blind end of the plugging cover 1 9. Through the complete elastic collision between molecules, between molecules and the plugging cover 1 9, and between molecules and the tube wall, the molecular motion after the collision eventually changes from being directional to being chaotic, no longer having a flow direction, and no longer forming a bundle, and becoming impact-free, so that the collision between gas molecules will not produce metallic sound, that is, no regenerative noise and noise pollution. Similarly, the airflow and sound waves discharged from the porous tube 8 directly pass through the porous flat tube 10 to the plugging cover 2 12 and the principle of silencing at the plugging cover 2 12 is the same as above.

[0037] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A large displacement motorcycle muffler, characterized in that: It includes a front connection component, an outer cylinder and a rear connection component connected in sequence; it also includes a muffler component arranged in the outer cylinder; the muffler component includes a porous mesh cylinder, a supporting baffle for supporting the porous mesh cylinder, a porous tube, a muffler baffle and at least two porous flat tubes; The supporting baffle and the muffler baffle divide the inner cavity of the outer cylinder into a first muffler cavity and a second muffler cavity; the porous tube is connected to the front connection component through a connecting pipe, and the porous tube is inserted on the supporting baffle through the connecting pipe and is located in the first muffler cavity; the porous flat tube is inserted on the muffler baffle and is located in the second muffler cavity, and the porous flat tube connects the first muffler cavity and the second muffler cavity; one end of the tail connection component extends into the second muffler cavity, and the other end is arranged outside the outer cylinder as an exhaust end; the porous mesh cylinder is arranged on the inner wall of the outer cylinder and fixed by the supporting baffle; One end of the porous tube is connected to the front connection component through a connecting pipe, and the other end is provided with a plugging cover to form a blind end; One end of the porous flat tube is connected to the first muffler cavity, and the other end is provided with a second plugging cover to form a blind end; the porous flat tubes are arranged obliquely from top to bottom; and a plurality of second muffler holes are provided on the tube wall of the porous flat tube.

2. The large displacement motorcycle muffler according to claim 1, characterized in that: The wall of the porous mesh cylinder is provided with a plurality of groups of sound-absorbing holes; the plurality of groups of sound-absorbing holes are arranged along the length direction of the porous mesh cylinder.

3. The large-displacement motorcycle muffler according to claim 2, characterized in that: The outer wall of the porous mesh tube is provided with a glass fiber layer for consuming sound energy.

4. The large displacement motorcycle muffler according to claim 2, characterized in that: The wall of the porous tube is provided with a plurality of first muffler holes; the porous tube is arranged at the same height as the muffler hole group.

5. The large displacement motorcycle muffler according to claim 1, characterized in that: The front connection assembly comprises a front cone and a front pipe; the front cone is connected to the outer cylinder; one end of the front pipe serves as an air inlet, and the other end is connected to the porous pipe through a connecting pipe.

6. The large displacement motorcycle muffler according to claim 1, characterized in that: The tail connection assembly comprises a tail cover and a tail pipe; the tail cover is connected to the outer cylinder; one end of the tail pipe extends into the second muffler cavity, and the other end is arranged outside the outer cylinder as an exhaust end.

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