JPH0231317U - - Google Patents
Info
- Publication number
- JPH0231317U JPH0231317U JP10841088U JP10841088U JPH0231317U JP H0231317 U JPH0231317 U JP H0231317U JP 10841088 U JP10841088 U JP 10841088U JP 10841088 U JP10841088 U JP 10841088U JP H0231317 U JPH0231317 U JP H0231317U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust outlet
- outlet pipe
- pipe
- valve
- passage length
- 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
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Exhaust Silencers (AREA)
Description
第１図は本考案に係るデユアルモードマフラの
一実施例を示す断面図、第２図は第１図に示すデ
ユアルモードマフラの高速域における状態を示す
図、第３図はエンジン回転速度―音圧レベル・背
圧の関係を示す特性図である。
１…デユアルモードマフラ、２…マフラ本体、
３〜６…室、８…排気導入管、９〜１１，１３，
１４…導管、１２…排気導出管、１５…バルブ、
１６…弁体、１７…索、２０…制御装置、２１…
アクチユエータ、２２…制御回路。
Fig. 1 is a sectional view showing an embodiment of the dual mode muffler according to the present invention, Fig. 2 is a diagram showing the state of the dual mode muffler shown in Fig. 1 in a high speed range, and Fig. 3 is a diagram showing engine rotation speed - noise. It is a characteristic diagram showing the relationship between pressure level and back pressure. 1...Dual mode muffler, 2...Muffler body,
3-6...chamber, 8...exhaust introduction pipe, 9-11, 13,
14... Conduit, 12... Exhaust outlet pipe, 15... Valve,
16...Valve body, 17...Cable, 20...Control device, 21...
Actuator, 22...control circuit.
Claims (1)
される共鳴室を、当該排気導出管に設けたバルブ
により当該排気導出管と連通可能とし、且つ当該
排気導出管を二重管としてその通路長さを可変と
し、エンジンの低速域において前記バルブを閉弁
して前記排気導出管の通路長さを略外管と内管と
の長さの和とし、エンジンの高速域において前記
バルブを開弁させて前記共鳴室を拡張室変更する
と共に排気導出管の通路長さを略内管の長さとす
ることを特徴とするデユアルモードマフラ。 A resonance chamber that communicates with the expansion chamber to which the exhaust outlet pipe of the muffler is connected is made to be able to communicate with the exhaust outlet pipe by a valve provided on the exhaust outlet pipe, and the exhaust outlet pipe is made into a double pipe with a passage length. The valve is closed in the low speed range of the engine so that the passage length of the exhaust outlet pipe is approximately the sum of the lengths of the outer pipe and the inner pipe, and the valve is opened in the high speed range of the engine. A dual mode muffler characterized in that the resonance chamber is changed into an expansion chamber and the passage length of the exhaust outlet pipe is made approximately the length of the inner pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10841088U JPH075215Y2 (en) | 1988-08-18 | 1988-08-18 | Dual mode muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10841088U JPH075215Y2 (en) | 1988-08-18 | 1988-08-18 | Dual mode muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0231317U true JPH0231317U (en) | 1990-02-27 |
| JPH075215Y2 JPH075215Y2 (en) | 1995-02-08 |
Family
ID=31343712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10841088U Expired - Lifetime JPH075215Y2 (en) | 1988-08-18 | 1988-08-18 | Dual mode muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075215Y2 (en) |
-
1988
- 1988-08-18 JP JP10841088U patent/JPH075215Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH075215Y2 (en) | 1995-02-08 |