JPS57191409A - Silencer - Google Patents
SilencerInfo
- Publication number
- JPS57191409A JPS57191409A JP7728381A JP7728381A JPS57191409A JP S57191409 A JPS57191409 A JP S57191409A JP 7728381 A JP7728381 A JP 7728381A JP 7728381 A JP7728381 A JP 7728381A JP S57191409 A JPS57191409 A JP S57191409A
- Authority
- JP
- Japan
- Prior art keywords
- flowpath
- spiral
- sound wave
- inner cylinder
- flowpaths
- 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.)
- Granted
Links
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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
PURPOSE:To deviate the phase of a sound wave generated from the outlet side of a main tubular body and improve the silencing effect with a simple construction by providing a multiplexed and spiral partition plate in a space between the inner cylinder and outer cylinder to divide the flowpath outside the inner cylinder. CONSTITUTION:An inner cylinder 4 is inserted into the inner side of an outer cylinder 3 both ends of which are connected to each of pipelines 1 and 2 at the inlet side and outlet side. A partition plate 5 partitioning the space in a double and spiral manner is provided in a space between the above both cylinders 3 and 4, and the flowpath between the cylinders 3 and 4 is divided into two spiral flowpaths 6 and 7. Further, one spiral flowpath 7 is partitioned in the midway by a partition plate 8. Accordingly, the sound wave propagated through the pipeline 1 is divided into a sound wave propagated through the flowpath 9 within the inner cylinder and a sound wave propagated through the spiral flowpath 6. Since the lengths of both flowpaths 6 and 9 differ from each other, the phases are generally different from each other at the outlet amalgamated point. Accordingly sound waves of the frequency component determined by the difference between the lengths of both flowpaths 6 and 9 are cancelled by the mutual interference and propagation to the pipeline 2 is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7728381A JPS57191409A (en) | 1981-05-21 | 1981-05-21 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7728381A JPS57191409A (en) | 1981-05-21 | 1981-05-21 | Silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57191409A true JPS57191409A (en) | 1982-11-25 |
| JPS6154928B2 JPS6154928B2 (en) | 1986-11-25 |
Family
ID=13629533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7728381A Granted JPS57191409A (en) | 1981-05-21 | 1981-05-21 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57191409A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606808U (en) * | 1983-06-28 | 1985-01-18 | スズキ株式会社 | internal combustion engine muffler |
| US6796859B1 (en) * | 2000-11-16 | 2004-09-28 | Bombardier Recreational Products Inc. | Air intake silencer |
| JP2008050989A (en) * | 2006-08-24 | 2008-03-06 | Denso Corp | Muffler |
| EP3830404A4 (en) * | 2018-08-03 | 2022-04-27 | Trustees of Boston University | Air-transparent selective sound silencer using ultra-open metamaterial |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5364369B2 (en) * | 2006-03-31 | 2013-12-11 | 株式会社ブリヂストン | Pneumatic tire |
-
1981
- 1981-05-21 JP JP7728381A patent/JPS57191409A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606808U (en) * | 1983-06-28 | 1985-01-18 | スズキ株式会社 | internal combustion engine muffler |
| JPH0121125Y2 (en) * | 1983-06-28 | 1989-06-23 | ||
| US6796859B1 (en) * | 2000-11-16 | 2004-09-28 | Bombardier Recreational Products Inc. | Air intake silencer |
| JP2008050989A (en) * | 2006-08-24 | 2008-03-06 | Denso Corp | Muffler |
| EP3830404A4 (en) * | 2018-08-03 | 2022-04-27 | Trustees of Boston University | Air-transparent selective sound silencer using ultra-open metamaterial |
| US11846217B2 (en) | 2018-08-03 | 2023-12-19 | Trustees Of Boston University | Air-transparent selective sound silencer using ultra-open metamaterial |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6154928B2 (en) | 1986-11-25 |
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