CN201277079Y - Rear silencer of car engine - Google Patents
Rear silencer of car engine Download PDFInfo
- Publication number
- CN201277079Y CN201277079Y CNU2008201596981U CN200820159698U CN201277079Y CN 201277079 Y CN201277079 Y CN 201277079Y CN U2008201596981 U CNU2008201596981 U CN U2008201596981U CN 200820159698 U CN200820159698 U CN 200820159698U CN 201277079 Y CN201277079 Y CN 201277079Y
- Authority
- CN
- China
- Prior art keywords
- expansion cavity
- expansion chamber
- noise reduction
- horns
- ram
- 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.)
- Expired - Fee Related
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses an automobile engine exhaust rear muffler, which belongs to automobile chassis accessories. The technical scheme comprises that the automobile engine rear muffler comprises a body, a shunt pipe, a gas outlet pipe, a front end plate, a rear end plate, a first spacer plate and a second spacer plate, wherein the front end plate, the rear end plate, the first spacer plate and the second spacer plate respectively separate the body into a first expansion chamber, a second expansion chamber and a third expansion chamber, a first eyelet group is further arranged surrounding the shunt pipe which is surrounded in the first expansion chamber, a first resistance muffling chamber is arranged surrounding the first eyelet group, a second eyelet group is further arranged surrounding the shunt pipe which is surrounded in the first expansion chamber, a third eyelet group is arranged surrounding the shunt pipe which is surrounded in the second expansion chamber, a fourth eyelet group is arranged surrounding the gas outlet pipe which is surrounded in the second expansion chamber, a second resistance muffling chamber is arranged surrounding the fourth eyelet group, and an elbow and a syphon tube are arranged at one end of the gas outlet pipe in the first expansion chamber. The first resistance muffling chamber and the second resistance muffling chamber are equipped with sound absorption materials.
Description
Technical field
The utility model relates to a kind of automobile engine to exhaust rear muffler, belongs to the automobile chassis annex.
Background technique
The effect of automotive muffler is to reduce the noise that motor produces; reduce vibration; improve the travelling comfort that automobile uses; the protection environment; the noise elimination poor effect of rear muffler in the prior art; noise height, the vibration that automobile is caused are big, and gases such as CO, the HC that gives off in the silencing apparatus, NO generate H under the effect of catalyst converter simultaneously
2O, CO
2, NO
2Deng material, therefore ponding in the silencing apparatus increase, add and contain some sulphide in the domestic oil product, ponding just becomes the sulphur material, and is very big to the corrosion of silencing apparatus, so just reduced the working life of silencing apparatus, and because the increase of ponding, the volume of eliminating the noise has reduced, use a period of time after, the performance of silencing apparatus noise reduction is also had certain influence.
Summary of the invention
The purpose of this utility model is to solve above-mentioned deficiency, improves the ability of rear muffler noise reduction, reduces noise, improves the travelling comfort of automobile, reduces the ponding in the rear muffler.
The technical solution of the utility model is a kind of rear noise deadener of automobile engine, comprise body, ram's horns, steam outlet pipe, front end-plate, end plate, first every dish, second every dish, front end-plate, end plate and first is every dish, second every the dish with body respectively enclosure become first expansion cavity, second expansion cavity, the 3rd expansion cavity, offer the first aperture group around being enclosed in the ram's horns in first expansion cavity, be provided with the first resistance noise reduction chamber around the first aperture group, also offer the second aperture group around being enclosed in the ram's horns in first expansion cavity, offer the 3rd aperture group around being enclosed in the ram's horns in second expansion cavity, offer the 4th aperture group around being enclosed in the steam outlet pipe in second expansion cavity, be provided with the second resistance noise reduction chamber around the 4th aperture group, steam outlet pipe is provided with elbow and syphon tube at an end of first expansion cavity.
Be provided with sound-absorbing material in the described first resistance noise reduction chamber; The described second resistance noise reduction chamber is provided with sound-absorbing material.
Beneficial effect: air-flow flows into ram's horns, and portion gas flow in the first resistance noise reduction chamber by the first aperture group aperture on the ram's horns, and the sound-absorbing material in the first resistance noise reduction chamber is favourable to reducing high-frequency noises, can the absorption portion high-frequency noises.The gas that flow in the first resistance noise reduction chamber turns back in the ram's horns by the first aperture group aperture again, and in process of flowing back and forth, air-flow bumps against, and produces friction with pipe fitting, lowers acoustic energy, thus reducing noise.Flow to gas in the 3rd expansion cavity by second the orifice flow on dish to second expansion cavity, and bump by the gas that flow into second expansion cavity from the 3rd aperture group aperture, reduce acoustic energy, reduce noise; Again by in second expansion cavity by first the orifice flow on dish in first expansion cavity, flow into the first resistance noise reduction chamber with the first aperture group aperture from ram's horns and to interfere, reduce noise.The steam outlet pipe that last gas enters by elbow and syphon tube, flow in the second resistance noise reduction chamber by the aperture that offers the 4th aperture group around the steam outlet pipe, sound-absorbing material in the second resistance noise reduction chamber is favourable to reducing high-frequency noises, absorption high-frequency noises that can be once more.When the flow velocity of air-flow and flow reached a certain amount of, the ponding in the silencer cylinder can be by syphon tube along with air-flow is discharged.
Description of drawings
Fig. 1 is the utility model rear noise deadener of automobile engine structural drawing;
Fig. 2 be among Fig. 1 A-A to sectional view;
Fig. 3 be among Fig. 1 B-B to sectional view.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
A kind of rear noise deadener of automobile engine, comprise body 2, ram's horns 1, steam outlet pipe 7, front end-plate 11, end plate 12, first every dish 4, second every dish 42, front end-plate 11, end plate 12 and first is every dish 4, second every the dish 42 with body 2 respectively enclosure become first expansion cavity 50, second expansion cavity 70, the 3rd expansion cavity 80, offer the first aperture group 20 around being enclosed in the ram's horns 1 in first expansion cavity 50, be provided with the first resistance noise reduction chamber 30 around the first aperture group 20, also offer the second aperture group 40 around being enclosed in the ram's horns 1 in first expansion cavity 50, offer the 3rd aperture group 60 around being enclosed in the ram's horns 1 in second expansion cavity 70, offer the 4th aperture group 120 around being enclosed in the steam outlet pipe 7 in second expansion cavity 70, be provided with the second resistance noise reduction chamber 130 around the 4th aperture group 120, steam outlet pipe 7 is provided with elbow 8 and syphon tube 9 at an end of first expansion cavity 50.
Be provided with sound-absorbing material 3 in the described first resistance noise reduction chamber 30.
Be provided with sound-absorbing material 6 in the described second resistance noise reduction chamber 130.
Air-flow flows into ram's horns 1, portion gas flow in the first resistance noise reduction chamber 30 by the aperture of the first aperture group 20 that is provided with on the ram's horns 1, it is favourable that 3 pairs of sound-absorbing materials in the first resistance noise reduction chamber 30 reduce high-frequency noises, can the absorption portion high-frequency noises.The gas that flow in the first resistance noise reduction chamber 30 turns back in the ram's horns 1 by the aperture of the first aperture group 20 on the ram's horns 1 again, and in process of flowing back and forth, air-flow bumps against, and produces friction with pipe fitting, reduces acoustic energy, thereby reduces noise.
Flow in first expansion cavity 50 by the aperture that is enclosed in the second aperture group of offering around the ram's horns 1 in first expansion cavity 50 40 again by the fraction gas that returns in the first resistance noise reduction chamber 30, a part flow in second expansion cavity 70 by the aperture that is enclosed in the 3rd aperture group of offering around the ram's horns 1 in second expansion cavity 70 60, and some flows in the 3rd expansion cavity 80.
The gas that flows in the 3rd expansion cavity 80 flow back in second expansion cavity 70 every the hole 90 of dish on 42 by second, and is flowed out to by the aperture from the 3rd aperture group 60 that gas bumps second expansion cavity 70, reduces acoustic energy, reduces noise; Gas is again by in second expansion cavity 70, flows in first expansion cavity 50 by first the hole 100 on dish 4, and the gas that flow into the first resistance noise reduction chamber 30 with the aperture of the first aperture group 20 from ram's horns 1 interferes, and reduces noise.
The steam outlet pipe 7 that last gas enters by elbow 8 and syphon tube 9, aperture by the 4th aperture group 120 offered around the steam outlet pipe in second expansion cavity 70 7 flow in the second resistance noise reduction chamber 130, it is favourable that 6 pairs of sound-absorbing materials in the second resistance noise reduction chamber 130 reduce high-frequency noises, can again absorb high-frequency noises, gas flows out rear muffler at last.
Gases such as the CO that gives off in the silencing apparatus, HC, NO generate H under the effect of catalyst converter
2O, CO
2, NO
2Deng material, therefore ponding in the silencing apparatus increase, and adds and contain some sulphide in the oil product that ponding just becomes the sulphur material, corrosion to silencing apparatus is very big, so just reduced the working life of silencing apparatus, and because the increase of ponding, the volume of noise elimination has reduced, after using a period of time, performance to the silencing apparatus noise reduction also has certain influence, and when the flow velocity of air-flow and flow reached a certain amount of, the ponding in the silencer cylinder can be by syphon tube along with air-flow is discharged.
Claims (3)
1, a kind of rear noise deadener of automobile engine, comprise body (2), ram's horns (1), steam outlet pipe (7), front end-plate (11), end plate (12), first every dish (4), second every dish (42), it is characterized in that: front end-plate (11), end plate (12) and first is every dish (4), second every the dish (42) with body (2) respectively enclosure become first expansion cavity (50), second expansion cavity (70), the 3rd expansion cavity (80), the ram's horns (1) that is enclosed in first expansion cavity (50) offers the first aperture group (20) all around, the first aperture group (20) is provided with the first resistance noise reduction chamber (30) on every side, the ram's horns (1) that is enclosed in first expansion cavity (50) also offers the second aperture group (40) all around, the ram's horns (1) that is enclosed in second expansion cavity (70) offers the 3rd aperture group (60) all around, the steam outlet pipe (7) that is enclosed in second expansion cavity (70) offers the 4th aperture group (120) all around, the 4th aperture group (120) is provided with the second resistance noise reduction chamber (130) on every side, and steam outlet pipe (7) is provided with elbow (8) and syphon tube (9) at an end of first expansion cavity (50).
2, rear noise deadener of automobile engine according to claim 1 is characterized in that: be provided with sound-absorbing material (3) in the described first resistance noise reduction chamber (30).
3, rear noise deadener of automobile engine according to claim 2 is characterized in that: be provided with sound-absorbing material (6) in the described second resistance noise reduction chamber (130).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201596981U CN201277079Y (en) | 2008-10-31 | 2008-10-31 | Rear silencer of car engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201596981U CN201277079Y (en) | 2008-10-31 | 2008-10-31 | Rear silencer of car engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201277079Y true CN201277079Y (en) | 2009-07-22 |
Family
ID=40894664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201596981U Expired - Fee Related CN201277079Y (en) | 2008-10-31 | 2008-10-31 | Rear silencer of car engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201277079Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865125A (en) * | 2012-05-23 | 2013-01-09 | 柳州利和排气控制系统有限公司 | Automobile muffler |
-
2008
- 2008-10-31 CN CNU2008201596981U patent/CN201277079Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865125A (en) * | 2012-05-23 | 2013-01-09 | 柳州利和排气控制系统有限公司 | Automobile muffler |
| CN102865125B (en) * | 2012-05-23 | 2015-05-20 | 柳州利和排气控制系统有限公司 | Automobile muffler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20151031 |
|
| EXPY | Termination of patent right or utility model |