CN109057931B - Motorcycle, exhaust device and pressure relief structure of exhaust device - Google Patents
Motorcycle, exhaust device and pressure relief structure of exhaust device Download PDFInfo
- Publication number
- CN109057931B CN109057931B CN201811215423.XA CN201811215423A CN109057931B CN 109057931 B CN109057931 B CN 109057931B CN 201811215423 A CN201811215423 A CN 201811215423A CN 109057931 B CN109057931 B CN 109057931B
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- exhaust
- pipe body
- pipe
- relief holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 210000001503 joint Anatomy 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 17
- 230000010349 pulsation Effects 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The application discloses a motorcycle, an exhaust device and a pressure relief structure of the exhaust device, the pressure relief structure of the exhaust device comprises: the muffler comprises an air inlet end and an air outlet end opposite to the air inlet end, and a first expansion cavity arranged close to the air inlet end is arranged in the muffler; and the exhaust pipe is communicated with an exhaust port of the engine and comprises a first pipe body, the first pipe body is arranged in the first expansion cavity, the outer wall of one end of the first pipe body is in sealing connection with the mounting port of the air inlet end, at least two pressure relief holes are formed in the side wall of the first pipe body, and all the pressure relief holes are unevenly distributed along the same circumference. The pressure relief structure can fully utilize the exhaust pulsation effect of the exhaust pipe to improve the air charging efficiency of the engine; the exhaust device adopts the pressure relief structure, so that the residual waste gas coefficient in the cylinder can be reduced, and the air charging efficiency of the engine can be improved; the motorcycle adopts the exhaust device and has better engine performance.
Description
Technical Field
The application relates to the technical field of motorcycles, in particular to a motorcycle, an exhaust device and a pressure relief structure of the exhaust device.
Background
The exhaust structure of the present motorcycle includes: an engine, an exhaust pipe connected to the engine, and an exhaust muffler connected to the exhaust pipe on the downstream side in the exhaust direction. Exhaust gas generated after fuel is combusted in the engine flows out of an exhaust port of the engine, flows in an exhaust pipe and flows to an exhaust muffler, and then is discharged from an exhaust tail pipe of the exhaust muffler to enter the atmosphere.
Exhaust gas of the exhaust device of the conventional motorcycle generates exhaust pressure reflection waves in the exhaust pipe, and if the exhaust pipe reflects positive pressure waves during the valve overlap angle, the exhaust pressure waves are blocked from being discharged; if negative pressure waves are reflected in the exhaust pipe, more exhaust gas can be sucked out, the residual exhaust gas in the combustion chamber and the cylinder is reduced, and more fresh mixed gas can enter the cylinder in the subsequent intake stroke. However, the conventional exhaust device cannot fully utilize the dynamic effect of the exhaust pipe on the gas fluid due to the defect of the pressure relief structure, so that the air charging efficiency of the engine is low.
Disclosure of Invention
Based on this, it is necessary to provide a motorcycle, an exhaust device, and a pressure release structure of the exhaust device; the pressure relief structure can fully utilize the exhaust pulsation effect of the exhaust pipe to improve the air charging efficiency of the engine; the exhaust device adopts the pressure relief structure, so that not only can the exhaust back pressure be reduced, but also the exhaust pulsation effect can be fully utilized, the exhaust pressure during the valve overlap angle is reduced, and the backflow exhaust gas is effectively pressed to flow back into the cylinder from the exhaust pipe, thereby reducing the residual exhaust gas coefficient in the cylinder and improving the air charging efficiency of the engine; the motorcycle adopts the exhaust device and has higher exhaust efficiency and better engine performance.
The technical scheme is as follows:
in one aspect, the present application provides a pressure relief structure for an exhaust device, comprising: the muffler comprises an air inlet end and an air outlet end opposite to the air inlet end, and a first expansion cavity arranged close to the air inlet end is arranged in the muffler; and the exhaust pipe is communicated with an exhaust port of the engine and comprises a first pipe body, the first pipe body is arranged in the first expansion cavity, the outer wall of one end of the first pipe body is in sealing connection with the mounting port of the air inlet end, at least two pressure relief holes are formed in the side wall of the first pipe body, and all the pressure relief holes are unevenly distributed along the same circumference.
The pressure relief holes of the pressure relief structure of the exhaust pipe are asymmetrically arranged in the circumferential direction of the exhaust pipe, gas in the exhaust pipe enters the first expansion cavity through the pressure relief holes, and at the moment, the pressure relief holes play a role in releasing exhaust pressure and also play a role in exhaust resonance, which is equivalent to designing at least two resonance models (one pressure relief hole corresponds to one resonance model) on the exhaust pipe. Thus, the first chamber is expanded when compressed by the pressure of the gas, and acts as a gas spring on the gas in the exhaust pipe through the pressure relief hole, thereby changing the pulsation of the exhaust pressure. The pressure relief holes are asymmetrically arranged in the circumferential direction of the exhaust pipe, so that resonance effects among the pressure relief holes cannot offset each other, and further, the exhaust pulsation effect can be fully utilized to improve the inflation efficiency of the engine.
The technical scheme is further described as follows:
in one embodiment, the first expansion chamber, the first pipe body and one of the pressure relief holes form an exhaust resonance model; the first expansion cavity is a resonant cavity, the pressure relief hole is equal to a connecting pipe between the first pipe body and the resonant cavity, the area of the pressure relief hole is the inner cross section area of the connecting pipe, and the depth of the pressure relief hole is the length of the connecting pipe.
In one embodiment, all of the pressure relief holes share one of the resonant cavities.
In one embodiment, at least two of the pressure relief holes are arranged on the same circumference side at intervals.
In one embodiment, the pressure relief holes comprise at least two first pressure relief holes arranged on the same circumference side at intervals, and at least two second pressure relief holes arranged on the circumference side outside the first pressure relief holes at intervals; the angle between the central lines of two adjacent first pressure relief holes is A1, and the angle between the central lines of two adjacent second pressure relief holes is A2 on the same circumference; wherein A1 < A2.
In one embodiment, the areas of all the first pressure relief holes are D1, and the areas of all the second pressure relief holes are D2; wherein D1 > D2.
In one embodiment, the number of the first pressure relief holes and the second pressure relief holes is three, d1=10mm, d2=6mm, a1=50°, a1=90°, and an angle between a center line of the adjacent first pressure relief hole and a center line of the second pressure relief hole is 40 °.
On the other hand, the application also provides an exhaust device of the motorcycle, which comprises the pressure relief structure, wherein the muffler also comprises a second expansion chamber communicated with the first expansion chamber and a third expansion chamber communicated with the second expansion chamber, and the third expansion chamber is provided with an exhaust tail pipe; the air outlet of the exhaust pipe is communicated with the first expansion chamber.
The exhaust device adopts the pressure relief structure, so that not only can the exhaust back pressure be reduced, but also the exhaust pulsation effect can be fully utilized, the exhaust pressure during the valve overlap angle is reduced, and the backflow exhaust gas is effectively pressed to flow back into the cylinder from the exhaust pipe, thereby reducing the residual exhaust gas coefficient in the cylinder and improving the air charging efficiency of the engine.
The technical scheme is further described as follows:
in one embodiment, the exhaust gas purifying catalyst body, the second pipe body, the third pipe body and the fourth pipe body, the exhaust gas purifying catalyst body is arranged at the air inlet end of the first pipe body, the air inlet end of the second pipe body is in butt joint with the air outlet end of the first pipe body, the air inlet end of the third pipe body is in butt joint with the air outlet end of the fourth pipe body, the third pipe body is in a U shape and is arranged in the second expansion chamber, the air inlet pipe of the fourth pipe body is in butt joint with the air outlet end of the third pipe body, the other end of the fourth pipe body is provided with the air outlet, and the air outlet is in communication with the first expansion chamber.
In still another aspect, the present application provides a motorcycle including the exhaust apparatus described above. The motorcycle adopts the exhaust device and has higher exhaust efficiency and better engine performance.
Drawings
FIG. 1 is a schematic illustration of an exhaust apparatus in a semi-section of an embodiment;
FIG. 2 is a schematic view in semi-section of the exhaust apparatus of FIG. 1 from another perspective;
FIG. 3 is a schematic three-dimensional structure of an exhaust device according to an embodiment;
FIG. 4 is a graph comparing performance curves of an exhaust apparatus;
FIG. 5 is a schematic diagram of a flow rate vector simulation comparison of an exhaust apparatus;
fig. 6 is a comparative schematic diagram of torque output simulation of an engine of a motorcycle.
Reference numerals illustrate:
100. the muffler, 110, the first expansion chamber, 120, the second expansion chamber, 130, the third expansion chamber, 132, the tail pipe, 102, the intake end, 104, the exhaust end, 200, the exhaust pipe, 210, the first pipe body, 212, the first relief hole, 214, the second relief hole, 220, the second pipe body, 230, the third pipe body, 240, the fourth pipe body, 242, the gas outlet, 250, the exhaust gas purifying catalyst body, 10, the performance curve of the non-perforated exhaust device, 20, the performance curve of the symmetrically perforated exhaust device, 30, the performance curve of the exhaust device in the present embodiment, 40, the valve overlap region, 50, the flow velocity vector of the exhaust device in the present embodiment, 60, the torque output curve of the engine of the motorcycle in the present embodiment.
Detailed Description
The present application will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "mounted," "positioned," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is perpendicular or nearly perpendicular to another element, it is meant that the ideal conditions for both are perpendicular, but certain vertical errors may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" as used herein do not denote a particular quantity or order, but rather are used to distinguish one element from another.
As shown in fig. 1 to 3, in the present embodiment, the pressure relief structure of the exhaust device includes: the muffler 100, the muffler 100 includes an air inlet end 102 and an air outlet end 104 opposite to the air inlet end 102, a first expansion cavity 110 arranged near the air inlet end 102 is arranged in the muffler 100; and the exhaust pipe 200 is communicated with an exhaust port of the engine, the exhaust pipe 200 comprises a first pipe body 210, the first pipe body 210 is arranged in the first expansion cavity 110, the outer wall of one end of the first pipe body 210 is in sealing connection with the mounting port of the air inlet end 102, at least two pressure relief holes are formed in the side wall of the first pipe body 210, and all the pressure relief holes are unevenly distributed along the same circumference.
As can be seen from fig. 4 to fig. 5, the pressure relief holes of the pressure relief structure of the exhaust pipe 200 are asymmetrically arranged along the circumferential direction of the exhaust pipe 200, and the gas in the exhaust pipe 200 enters the first expansion chamber 110 through the pressure relief holes, so that the pressure relief holes not only release the action of the exhaust pressure, but also play the role of exhaust resonance, which is equivalent to designing at least two resonance models (one pressure relief hole corresponds to one resonance model) on the exhaust pipe 200. Thus, the first chamber gas pressure is compressed and expands as a gas spring acts on the gas in the exhaust pipe 200 through the pressure relief hole, thereby changing pulsation of the exhaust pressure. The pressure relief holes are asymmetrically arranged in the circumferential direction of the exhaust pipe 200, so that resonance effects among the pressure relief holes cannot cancel each other, and further, the exhaust pulsation effect can be fully utilized to improve the engine charging efficiency. In addition, the main parameters affecting reflection of the exhaust wave are the first pipe 210 and the first expansion chamber 110, and the pressure release holes (such as the first pressure release hole 212 and the second pressure release hole 214) are opened in the first expansion chamber 110, so that the short-circuit phenomenon of the gas can be avoided, and the performance of the exhaust device is further improved.
Based on the above embodiments, in one embodiment, the first expansion chamber 110, the first pipe 210 and a pressure relief hole form an exhaust resonance model; the first expansion chamber 110 is a resonant cavity, the pressure relief hole is equal to a connecting pipe between the first pipe body 210 and the resonant cavity, the area of the pressure relief hole is an inner cross-sectional area of the connecting pipe, and the depth of the pressure relief hole is the length of the connecting pipe. Whether the arrangement between at least two pressure relief holes is symmetrical or asymmetrical has little effect on the average exhaust back pressure from a steady-state flow of fluid, as long as the total flow area of all pressure relief holes is ensured to be the same. The pressure relief holes are unevenly distributed, so that resonance effects among the pressure relief holes cannot offset each other, and further exhaust pulsation effect can be fully utilized while exhaust back pressure is reduced, and the air charging efficiency of the engine can be improved. The volume of the resonant cavity is equal to the volume of the first expansion chamber 110 minus the volume occupied by all of the tubes within the first expansion chamber 100. When the pressure relief hole is a circular hole, the inner diameter of the pressure relief hole is the inner diameter of the connecting pipe.
Further, in one embodiment, all the pressure relief holes share a resonant cavity. Therefore, the position of the resonant cavity in the axial direction of the exhaust pipe is not changed, and a better resonant effect can be obtained.
Based on any of the above embodiments, in one embodiment, all the pressure relief holes are disposed on the cone of the first pipe 210. The pressure relief hole is arranged on the cone of the first pipe body 210, the sectional area of the cone is closed from large to small, the pressure is increased sharply, the pressure change of the gas on the cone surface is large, especially the high-temperature high-pressure exhaust is carried out, the pressure relief effect is best, and the flow rate of the pipe with a longer diameter and smaller diameter behind the cone can be reduced, so that the resistance is reduced; meanwhile, the direct collision of high-speed air flow to the wall surface of the surrounding cylinder body can be avoided, and the flow resistance loss of resistance air is reduced.
It should be noted that "all the pressure relief holes are unevenly arranged along the same circumference" means that at least one pressure relief hole has an area size that is asymmetric with the area sizes of other pressure relief holes, or/and all the pressure relief holes are asymmetrically arranged.
In addition, at least two pressure release holes interval sets up in same week side.
On the basis of the above embodiment, in an embodiment, as shown in fig. 4 and 5, the pressure relief holes include at least two first pressure relief holes 212 disposed at intervals on the same peripheral side, and at least two second pressure relief holes 214 disposed at intervals on the peripheral side outside the first pressure relief holes 212; wherein, on the same circumference, the angle between the center lines of two adjacent first pressure relief holes 212 is A1, and the angle between the center lines of two adjacent second pressure relief holes 214 is A2; wherein A1 < A2.
Further, in an embodiment, the areas of all the first pressure relief holes 212 are D1, and the areas of all the second pressure relief holes 214 are D2; wherein D1 > D2. Thus, the shapes of the first pressure relief hole 212 and the second pressure relief hole 214 can be selected according to actual needs. When the first pressure relief hole 212 and the second pressure relief hole 214 are both circular holes, the aperture can be used for calculation.
Specifically, the number of the first relief holes 212 and the second relief holes 214 is three, d1=10mm, d2=6mm, a1=50°, a1=90°, and the angle between the center line of the adjacent first relief holes 212 and the center line of the second relief hole 214 is 40 °.
In another embodiment, as shown in fig. 1 to 3, there is further provided an exhaust apparatus of a motorcycle, including the above-mentioned pressure relief structure, the muffler 100 further including a second expansion chamber communicating with the first expansion chamber, a third expansion chamber communicating with the second expansion chamber, the third expansion chamber being provided with an air outlet 232; the tail pipe 132 of the exhaust pipe 200 communicates with the first expansion chamber.
As can be seen from the analysis of fig. 4 and 5, the exhaust device adopts the pressure relief structure, which not only can reduce the exhaust back pressure, but also can fully utilize the exhaust pulsation effect, reduce the exhaust pressure during the valve overlap angle, and effectively suppress the backflow exhaust gas from the exhaust pipe 200 to flow back into the cylinder, thereby reducing the residual exhaust gas coefficient in the cylinder and improving the charging efficiency of the engine. In addition, the first expansion chamber 110 has a much greater degree of influence on the performance than the second expansion chamber 120, so that the exhaust pipe is communicated with the first expansion chamber 110, and the reflection of the exhaust pipe pressure wave can be directly influenced, which is easy to improve the performance of the engine.
Based on the above embodiment, in an embodiment, the exhaust pipe 200 further includes an exhaust gas purifying catalyst 250, a second pipe 220, a third pipe 230 and a fourth pipe 240, the exhaust gas purifying catalyst 250 is disposed at the air inlet end of the first pipe 210, the air inlet end of the second pipe 220 is in butt joint with the air outlet end of the first pipe 210, the air inlet end of the third pipe 230 is in butt joint with the air outlet end of the fourth pipe 240, the third pipe 230 is in a U shape and is disposed in the second expansion chamber 120, the air inlet pipe of the fourth pipe 240 is in butt joint with the air outlet end of the third pipe 230, the other end of the fourth pipe 240 is provided with an air outlet 242, and the air outlet 242 is in communication with the first expansion chamber 110. So through setting up second body 220, third body 230 and fourth body 240 and prolonging the length of blast pipe 200, make from the gaseous and the gaseous interact of follow first, two relief hole exhaust of gas outlet 242 reach better resonance effect, can make the exhaust more thoroughly, and then can promote the low rotational speed moment of torsion in the engine.
In another embodiment, there is also provided a motorcycle including the exhaust apparatus described above. As can be seen from fig. 6, the motorcycle has higher exhaust efficiency and better engine performance by using the exhaust device.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (7)
1. A pressure relief structure for an exhaust device, comprising:
the muffler comprises an air inlet end and an air outlet end opposite to the air inlet end, and a first expansion cavity arranged close to the air inlet end is arranged in the muffler; and
The exhaust pipe is communicated with an exhaust port of the engine and comprises a first pipe body, the first pipe body is arranged in the first expansion cavity, at least two pressure relief holes are formed in the side wall of the first pipe body, and all the pressure relief holes are unevenly distributed along the same circumference;
the first expansion cavity, the first pipe body and the pressure relief hole form an exhaust resonance model; the first expansion cavity is a resonant cavity, the pressure relief hole is equal to a connecting pipe between the first pipe body and the resonant cavity, the area of the pressure relief hole is the inner sectional area of the connecting pipe, and the depth of the pressure relief hole is the length of the connecting pipe;
all the pressure relief holes are arranged on the cone of the first pipe body;
the pressure relief holes comprise at least two first pressure relief holes arranged on the same circumference side at intervals and at least two second pressure relief holes arranged on the circumference side outside the first pressure relief holes at intervals; the angle between the central lines of two adjacent first pressure relief holes is A1, and the angle between the central lines of two adjacent second pressure relief holes is A2 on the same circumference; wherein A1 < A2.
2. The pressure relief structure of claim 1, wherein all of said pressure relief holes share one of said resonant cavities.
3. The pressure relief structure of claim 1, wherein the areas of all of the first pressure relief holes are D1 and the areas of all of the second pressure relief holes are D2; wherein D1 > D2.
4. The pressure relief structure of claim 3, wherein the number of the first pressure relief holes and the second pressure relief holes is three, d1=10mm, d2=6mm, a1=50°, a1=90°, and an angle between a center line of the adjacent first pressure relief holes and a center line of the second pressure relief holes is 40 °.
5. An exhaust device for a motorcycle, comprising the pressure release structure according to any one of claims 1 to 4, the muffler further comprising a second expansion chamber communicating with the first expansion chamber, a third expansion chamber communicating with the second expansion chamber, the third expansion chamber being provided with a tail pipe; the air outlet of the exhaust pipe is communicated with the first expansion chamber.
6. The exhaust device according to claim 5, wherein the exhaust pipe further comprises an exhaust gas purifying catalyst body, a second pipe body, a third pipe body and a fourth pipe body, the exhaust gas purifying catalyst body is disposed at the air inlet end of the first pipe body, the air inlet end of the second pipe body is in butt joint communication with the air outlet end of the first pipe body, the air inlet end of the third pipe body is in butt joint communication with the air outlet end of the fourth pipe body, the third pipe body is in a U shape and is disposed in the second expansion chamber, the air inlet pipe of the fourth pipe body is in butt joint communication with the air outlet end of the third pipe body, the other end of the fourth pipe body is provided with the air outlet, and the air outlet is in communication with the first expansion chamber.
7. A motorcycle comprising an exhaust apparatus according to claim 5 or 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215423.XA CN109057931B (en) | 2018-10-18 | 2018-10-18 | Motorcycle, exhaust device and pressure relief structure of exhaust device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215423.XA CN109057931B (en) | 2018-10-18 | 2018-10-18 | Motorcycle, exhaust device and pressure relief structure of exhaust device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109057931A CN109057931A (en) | 2018-12-21 |
| CN109057931B true CN109057931B (en) | 2023-09-01 |
Family
ID=64764234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811215423.XA Active CN109057931B (en) | 2018-10-18 | 2018-10-18 | Motorcycle, exhaust device and pressure relief structure of exhaust device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109057931B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821600A (en) * | 2019-10-14 | 2020-02-21 | 江门市大长江集团有限公司 | Engine exhaust structure, engine and motorcycle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55137307A (en) * | 1979-04-14 | 1980-10-27 | Yamaha Motor Co Ltd | Exhaust pipe |
| JPH04140413A (en) * | 1990-10-01 | 1992-05-14 | Yamaha Motor Co Ltd | Exhaust emission control device for internal combustion engine |
| CN101487411A (en) * | 2007-10-31 | 2009-07-22 | 雅马哈发动机株式会社 | Waste gas processing system, engion unit and vehicle |
| CN208934782U (en) * | 2018-10-18 | 2019-06-04 | 江门市大长江集团有限公司 | The pressure relief of motorcycle, exhaust apparatus and exhaust apparatus |
-
2018
- 2018-10-18 CN CN201811215423.XA patent/CN109057931B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55137307A (en) * | 1979-04-14 | 1980-10-27 | Yamaha Motor Co Ltd | Exhaust pipe |
| JPH04140413A (en) * | 1990-10-01 | 1992-05-14 | Yamaha Motor Co Ltd | Exhaust emission control device for internal combustion engine |
| CN101487411A (en) * | 2007-10-31 | 2009-07-22 | 雅马哈发动机株式会社 | Waste gas processing system, engion unit and vehicle |
| CN208934782U (en) * | 2018-10-18 | 2019-06-04 | 江门市大长江集团有限公司 | The pressure relief of motorcycle, exhaust apparatus and exhaust apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109057931A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080308346A1 (en) | Muffler having fluid swirling vanes | |
| KR100853583B1 (en) | Counterflow control circulation exhaust device of engine | |
| CN108425719A (en) | Muffler and automobile | |
| CN109057931B (en) | Motorcycle, exhaust device and pressure relief structure of exhaust device | |
| US20100146956A1 (en) | Automotive exhaust system | |
| CN201865727U (en) | Silencing device for reducing noise of internal combustion engine | |
| CN210195846U (en) | Silencer and automobile exhaust system comprising same | |
| CN217206614U (en) | Novel conical silencer with pressure relief structure | |
| CN208934782U (en) | The pressure relief of motorcycle, exhaust apparatus and exhaust apparatus | |
| CN201173143Y (en) | Low noise automobile exhaust silencer | |
| CN102619591A (en) | Airflow reverse opposite-impact silencing unit in exhaust silencer of internal combustion engine | |
| CN211500751U (en) | Engine exhaust structure, engine and motorcycle | |
| CN105927594A (en) | Muffler of turbocharger | |
| CN208441906U (en) | Muffler and automobile | |
| CN103696840B (en) | A kind of silencing apparatus | |
| JP2007270817A (en) | Exhaust gas muffler of engine | |
| CN215109103U (en) | Motorcycle silencer | |
| CN214330727U (en) | Silencer | |
| CN213574284U (en) | Low-noise multi-cavity silencer | |
| CN208396778U (en) | Silencer | |
| CN218882396U (en) | Air inlet pipe with pressure stabilizing function at one end of diesel engine | |
| CN110821600A (en) | Engine exhaust structure, engine and motorcycle | |
| KR101708532B1 (en) | Muffler for Vehicle | |
| CN208534574U (en) | Silencer | |
| CN215292624U (en) | Silencer with multistage amortization structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |