JPH03114513U - - Google Patents
Info
- Publication number
- JPH03114513U JPH03114513U JP2363990U JP2363990U JPH03114513U JP H03114513 U JPH03114513 U JP H03114513U JP 2363990 U JP2363990 U JP 2363990U JP 2363990 U JP2363990 U JP 2363990U JP H03114513 U JPH03114513 U JP H03114513U
- Authority
- JP
- Japan
- Prior art keywords
- pressure sensor
- exhaust
- diagram showing
- muffler
- fluctuating
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
第１図〜第２図は本考案の一実施例を示す図で
、第１図は概略全体構成図、第２図は制御関係回
路を示すブロツク図、第３図は本考案の作動原理
を示す説明図、第４図〜第６図は排気管内現象説
明図で、第４図は高周波異音発生時の３節音圧モ
ードを示す説明図、第５図は高周波異音が発生し
ていない場合の音圧モード例を示す説明図、第６
図は実機における高周波異音発生時の音圧モード
例を示す説明図、第７図は従来例を示す図である
。
１……エンジン、２……排気マニホルド、３…
…排気管、４……吐出口、５……触媒コンバータ
、６……プリマフラ、７……メインマフラ、１１
，１２……圧力センサ、１３，１４……絞り弁、
１５……コントロールユニツト、１６……アクチ
ユエータ。
Figures 1 and 2 are diagrams showing one embodiment of the present invention. Figure 1 is a schematic overall configuration diagram, Figure 2 is a block diagram showing control related circuits, and Figure 3 illustrates the operating principle of the present invention. Figures 4 to 6 are explanatory diagrams of phenomena in the exhaust pipe. Figure 4 is an explanatory diagram showing the three-node sound pressure mode when high-frequency abnormal noise occurs, and Figure 5 is an explanatory diagram showing the three-bar sound pressure mode when high-frequency abnormal noise is generated. Explanatory diagram showing an example of sound pressure mode when no
The figure is an explanatory diagram showing an example of the sound pressure mode when high-frequency abnormal noise occurs in an actual machine, and FIG. 7 is a diagram showing a conventional example. 1...Engine, 2...Exhaust manifold, 3...
...Exhaust pipe, 4...Discharge port, 5...Catalytic converter, 6...Primary muffler, 7...Main muffler, 11
, 12...pressure sensor, 13, 14...throttle valve,
15...control unit, 16...actuator.
Claims (1)
端部等の排気系拡張部端に設置され該位置の変動
圧を検出する圧力センサと、該圧力センサによつ
て検出された変動圧の正側と負側との絶対値の差
が所定値より大きくなつたときに信号を出力する
制御部と、前記信号によつて駆動される、排気系
に生ずる共鳴音圧モードの節となる位置付近に設
置された可動型絞り機構とを有することを特徴と
する自動車用排気音低減装置。 A pressure sensor installed at the end of an exhaust system expansion part such as the discharge end of an exhaust pipe or the opening end of a muffler to an expansion chamber, and detects the fluctuating pressure at that position, and the fluctuating pressure detected by the pressure sensor. a control unit that outputs a signal when the difference in absolute value between the positive side and negative side of An exhaust noise reduction device for an automobile, comprising a movable diaphragm mechanism installed near a position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2363990U JPH03114513U (en) | 1990-03-08 | 1990-03-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2363990U JPH03114513U (en) | 1990-03-08 | 1990-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03114513U true JPH03114513U (en) | 1991-11-25 |
Family
ID=31526620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2363990U Pending JPH03114513U (en) | 1990-03-08 | 1990-03-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03114513U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011055415A1 (en) * | 2009-11-09 | 2011-05-12 | トヨタ自動車株式会社 | Exhaust device of internal combustion engine |
-
1990
- 1990-03-08 JP JP2363990U patent/JPH03114513U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011055415A1 (en) * | 2009-11-09 | 2011-05-12 | トヨタ自動車株式会社 | Exhaust device of internal combustion engine |
| JP5298202B2 (en) * | 2009-11-09 | 2013-09-25 | トヨタ自動車株式会社 | Exhaust device for internal combustion engine |
| US8763384B2 (en) | 2009-11-09 | 2014-07-01 | Toyota Jidosha Kabushiki Kaisha | Exhaust apparatus of internal combustion engine |
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