JPS63164556U - - Google Patents
Info
- Publication number
- JPS63164556U JPS63164556U JP5717587U JP5717587U JPS63164556U JP S63164556 U JPS63164556 U JP S63164556U JP 5717587 U JP5717587 U JP 5717587U JP 5717587 U JP5717587 U JP 5717587U JP S63164556 U JPS63164556 U JP S63164556U
- Authority
- JP
- Japan
- Prior art keywords
- engine
- peripheral surface
- inner peripheral
- sectional area
- intake
- 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
- 230000030279 gene silencing Effects 0.000 claims description 6
- 239000011358 absorbing material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 2
- 239000012528 membrane Substances 0.000 claims 1
- 230000003584 silencer Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
第１図〜第７図は本考案の一実施例を示し、第
１図はエンジンの吸気系を示す一部断面平面図、
第２図は第１図―線における断面図、第３図
は第１図―線における断面図、第４図はエン
ジン付近の平面図である。第５図は騒音低減装置
の基本構造を示す縦断面図、第６図は消音量を示
す図、第７図は従来例と比較して示す音圧レベル
の測定結果図である。第８図〜第１１図は従来例
を示し、第８図は膨張型サイレンサの縦断面図、
第９図は膨張型サイレンサの消音量を示す図、第
１０図は共鳴型サイレンサの縦断面図、第１１図
は共鳴型サイレンサの消音量を示す図である。
１…エンジン、９…エアクリーナ、１０…吸気
管、１１，１２，１３…騒音低減装置、２１…消
音室、２２…ケース、２３…吸音材、２４…金属
板、２４ａ…小孔、２５…流入口、２６…流出口
。
1 to 7 show an embodiment of the present invention, and FIG. 1 is a partially sectional plan view showing the intake system of the engine;
FIG. 2 is a sectional view taken along the line in FIG. 1, FIG. 3 is a sectional view taken along the line in FIG. 1, and FIG. 4 is a plan view of the vicinity of the engine. FIG. 5 is a vertical cross-sectional view showing the basic structure of the noise reduction device, FIG. 6 is a view showing the amount of silencing, and FIG. 7 is a diagram showing the measurement results of the sound pressure level in comparison with a conventional example. 8 to 11 show conventional examples, and FIG. 8 is a longitudinal cross-sectional view of an expansion type silencer;
FIG. 9 is a diagram showing the silencing amount of the expansion type silencer, FIG. 10 is a longitudinal sectional view of the resonance type silencer, and FIG. 11 is a diagram showing the silencing amount of the resonance type silencer. DESCRIPTION OF SYMBOLS 1... Engine, 9... Air cleaner, 10... Intake pipe, 11, 12, 13... Noise reduction device, 21... Silencing chamber, 22... Case, 23... Sound absorbing material, 24... Metal plate, 24a... Small hole, 25... Flow Inlet, 26...outlet.
Claims (1)
通路断面積より大きい断面積の消音室と、該消音
室の内周面に配設され、吸排気音を吸収する吸音
材と、該吸音材の内周面にフロート支持され、膜
振動で吸排気音を吸収する金属板とを備えている
ことを特徴とするエンジンの騒音低減装置。 a silencing chamber formed in the middle of a passage communicating with the engine and having a cross-sectional area larger than the sectional area of the passage; a sound-absorbing material disposed on the inner peripheral surface of the silencing chamber for absorbing intake and exhaust sounds; An engine noise reduction device characterized by comprising a metal plate that is float-supported on an inner peripheral surface and absorbs intake and exhaust noise through membrane vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5717587U JPH0543262Y2 (en) | 1987-04-15 | 1987-04-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5717587U JPH0543262Y2 (en) | 1987-04-15 | 1987-04-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63164556U true JPS63164556U (en) | 1988-10-26 |
| JPH0543262Y2 JPH0543262Y2 (en) | 1993-10-29 |
Family
ID=30886642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5717587U Expired - Lifetime JPH0543262Y2 (en) | 1987-04-15 | 1987-04-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543262Y2 (en) |
-
1987
- 1987-04-15 JP JP5717587U patent/JPH0543262Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0543262Y2 (en) | 1993-10-29 |
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