JPH03182624A - Intake structure of internal combustion engine - Google Patents
Intake structure of internal combustion engineInfo
- Publication number
- JPH03182624A JPH03182624A JP32133189A JP32133189A JPH03182624A JP H03182624 A JPH03182624 A JP H03182624A JP 32133189 A JP32133189 A JP 32133189A JP 32133189 A JP32133189 A JP 32133189A JP H03182624 A JPH03182624 A JP H03182624A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- diaphragm
- internal combustion
- combustion engine
- frequency
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 230000010349 pulsation Effects 0.000 claims abstract description 16
- 238000013016 damping Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Landscapes
- Characterised By The Charging Evacuation (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〉
この発明は内燃機関の吸気構造に関し、特に吸気脈動を
利用して膜振動を発生させることで吸気効率を向上させ
る構造に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an intake structure for an internal combustion engine, and more particularly to a structure that improves intake efficiency by generating membrane vibration using intake pulsation.
（従来の技術）
最近では自動車用のエンジンの高出力化に伴い、吸入空
気量の増加が望まれている。(Prior Art) Recently, with the increase in the output of automobile engines, it has been desired to increase the amount of intake air.
このことから、現在では可変吸気システムを採用するこ
とが種々研究されている。For this reason, various studies are currently being conducted on the use of variable intake systems.
（発明が解決しようとする課題）
この発明は、内燃機関における吸入空気の脈動を利用し
て吸気構造体を膜振動させ、これにより吸入効果を増大
させることを目的としている。(Problems to be Solved by the Invention) The object of the present invention is to cause an intake structure to undergo membrane vibration by utilizing the pulsation of intake air in an internal combustion engine, thereby increasing the intake effect.
また、この発明では、以上の作動を既存の吸気系構造物
を利用して行えるようにすることを他の目的としている
。Another object of the present invention is to enable the above operations to be performed using existing intake system structures.
（課題を解決するための手段）
前記目的を達成するため、この発明は、内燃機関の吸気
系構造物にダイヤフラムを設け、このダイヤフラムを吸
気脈動に応じて振動させるようにした。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a diaphragm in the intake system structure of an internal combustion engine, and vibrates the diaphragm in accordance with intake pulsation.
またこの発明では、吸気系構造物としてエアクリーチを
用いることができる。Further, in this invention, an air creech can be used as the intake system structure.
さらには、ダイヤフラムの固有振動数を変化させる制振
手段と、内燃機関の回転数を検知する検知手段と、検知
手段の検知出力に応じて前記制振手段を作動させるため
の制御手段とを備えるように出来る。Furthermore, it includes a damping means for changing the natural frequency of the diaphragm, a detection means for detecting the rotational speed of the internal combustion engine, and a control means for operating the damping means in accordance with the detection output of the detection means. It can be done like this.
（作 用）
以上の構成によれば、吸入空気の脈動の周波数と、ダイ
ヤフラムの固有振動数とを一致させることで吸気負圧を
増大すべくダイヤプラムが振動し、吸入効果を高めるこ
とができる。(Function) According to the above configuration, by matching the frequency of the pulsation of the intake air with the natural frequency of the diaphragm, the diaphragm vibrates to increase the intake negative pressure, thereby increasing the intake effect. .
さらに、制振手段を設けることで機関の回転数変化に追
随させてダイヤフラムを必要な回転領域でのみ振動させ
ることができる。Further, by providing a vibration damping means, the diaphragm can be vibrated only in a necessary rotation range by following changes in the engine rotation speed.
（実 施 例ン
以下、この発明の一実施例を図面を用いて詳細に説明す
る。(Example) Hereinafter, an example of the present invention will be explained in detail with reference to the drawings.
第１図において、１はエンジン２のキャブレタに接続さ
れたエアクリーナであって、このエアクリーナ１は、周
囲に吸気口３ａを設け、下部に前記キャブレタに連通す
る空気出口３ｂを形成したケース３と、ケース３の上面
開口に装着されたカバー４、およびケース３内部にあっ
て吸気口３ａ側と出口３ｂ側を仕切るリング状のフィル
タエレメント５とから基本的に構成されている。In FIG. 1, reference numeral 1 denotes an air cleaner connected to a carburetor of an engine 2, and the air cleaner 1 includes a case 3 having an intake port 3a around the periphery and an air outlet 3b communicating with the carburetor at the bottom; It basically consists of a cover 4 attached to the upper opening of the case 3, and a ring-shaped filter element 5 located inside the case 3 and partitioning the intake port 3a side and the outlet 3b side.
カバー４の中央には例えばゴム膜などからなるダイヤフ
ラム６が張設され、前記空気出口３ｂの上部に対面して
いる。A diaphragm 6 made of, for example, a rubber membrane is stretched over the center of the cover 4 and faces the upper part of the air outlet 3b.
このダイヤフラム６の固有振動数は、エンジン２の吸入
効率を高めたい回転数領域に合わせた振動数に設定され
ている。The natural frequency of this diaphragm 6 is set to a frequency that matches the rotational speed range in which the suction efficiency of the engine 2 is desired to be increased.
また、このダイヤフラム６の周囲部にあって、カバー５
上には、一端を前記ダイヤフラム６に結合した制振手段
としてのアクチュエータ７が設けられている。Also, a cover 5 is provided around the diaphragm 6.
An actuator 7 serving as vibration damping means and having one end coupled to the diaphragm 6 is provided on the top.
一方エンジン２の出力軸には、回転検出手段としての回
転計８が設けられ、この回転計８の検知出力はワンチッ
プマイコンなどによって構成される制御部９に人力され
る。On the other hand, a tachometer 8 as a rotation detecting means is provided on the output shaft of the engine 2, and the detection output of the tachometer 8 is manually inputted to a control section 9 constituted by a one-chip microcomputer or the like.
この制御部９にはエンジン２の回転数に応じたダイヤフ
ラム６の最適張力に相当するアクチュエータフの駆動力
が予めプログラムされており、前記回転計８の検出出力
に応じて前記アクチュエータ７に対する駆動信号を出力
し、これに応じてアクチュエータ７はダイヤフラム６に
対する張力を調整し、固有振動数を変化させる。A driving force for the actuator tough corresponding to the optimum tension of the diaphragm 6 according to the rotational speed of the engine 2 is programmed in advance in the control unit 9, and a driving force for the actuator 7 is sent in accordance with the detection output of the tachometer 8. Accordingly, the actuator 7 adjusts the tension on the diaphragm 6 and changes the natural frequency.
以上の構成において、エンジン２が回転し、その結果エ
アクリーナ１に空気が吸入されると、回転周波数に応じ
た周波数の吸気脈動がエアクリーナ１の内部に発生する
。そして、この吸気脈動の周波数がダイヤフラム６の固
有振動数に一致する、すなわち、エンジン２に要求され
る吸入効率を高めたい回転数領域になると、ダイヤフラ
ム６は吸気脈動と同期して振動し、その結果、吸気脈動
と共鳴し、ダイヤフラム６がポンプの役目をはたし、吸
入効率を高めることになる。In the above configuration, when the engine 2 rotates and air is sucked into the air cleaner 1 as a result, intake pulsation occurs inside the air cleaner 1 at a frequency corresponding to the rotational frequency. Then, when the frequency of this intake pulsation matches the natural frequency of the diaphragm 6, that is, when the engine 2 is in the rotational speed region where the intake efficiency required to be increased is desired, the diaphragm 6 vibrates in synchronization with the intake pulsation. As a result, the diaphragm 6 resonates with the intake pulsation, and the diaphragm 6 functions as a pump, increasing the intake efficiency.
さらに、回転数変化に応じてアクチュエータ７が駆動さ
れると、ダイヤフラム６の張力は変化し、その固有振動
数は吸気脈動の周波数に追随するので、吸気効率を高め
たい領域以外であっても、吸気効率が向上することにな
る。Furthermore, when the actuator 7 is driven according to a change in the rotational speed, the tension of the diaphragm 6 changes and its natural frequency follows the frequency of intake pulsation, so even if the intake efficiency is not in the region where you want to increase the intake efficiency, Intake efficiency will improve.
なお、例えば前記ダイヤフラム６の材料を鉄板とし、半
径が１５０ａ＋ｍ、板厚２．Ｏｍｍとすると、共振周波
数ｆは以下の近似式で求めることができ −
ｈ １
１２ （−μ）
但しＤ−曲げ剛性
Ｒ−半径−１５０ｍｍ
ｈ−板厚−２，Ｏｌ鳳
ρ−密度−０． ７８５ Ｘ １０−２ｋｇ／Ｃｌ１ｌ
’Ｅ−ヤング率−２１０００ｋｇ／關２
μｍポアソン比−０，３
以上の条件によって、計算し、解を求めると周波数ｆ”
３４Ｈｚとなる。すなわちエンジンの回転数２０００ｒ
、ｐ、ｍで前記ダイヤフラムは共振し、吸入効率が高め
られることになる。Note that, for example, the diaphragm 6 is made of an iron plate, has a radius of 150 a+m, and a plate thickness of 2. Omm, the resonant frequency f can be determined by the following approximate formula - h 1 12 (-μ) where D - bending rigidity R - radius - 150 mm h - plate thickness - 2, Olho ρ - density - 0. 785 X 10-2kg/Cl1l
'E - Young's modulus - 21000 kg/2 μm Poisson's ratio - 0.3 Calculate and find the solution using the above conditions, frequency f'
It becomes 34Hz. In other words, the engine speed is 2000 r.
, p, and m, the diaphragm resonates and the suction efficiency is increased.
但し、以上の計算例は一例であって、ダイヤフラム６の
径や、厚み、材質を、要求される回転数領域に合わせて
自在に設定できることは勿論である。However, the above calculation example is just an example, and it goes without saying that the diameter, thickness, and material of the diaphragm 6 can be freely set according to the required rotation speed range.
また、これと併せて前記アクチュエータにより固有振動
数を変化させることで、該当する回転領域以外での吸気
効率も高めることができる。Furthermore, by changing the natural frequency using the actuator in conjunction with this, it is also possible to increase the intake efficiency outside the relevant rotation range.
しかしながら、この発明では以上の制振手段を必ずしも
必要せず、最適回転数領域に合わせた固有振動数に設定
されたダイヤフラム単独だけでもよいことは勿論であり
、この場合には吸気系の構成がより簡素化する。However, in this invention, the above-mentioned vibration damping means is not necessarily required, and it is of course possible to use only a diaphragm set to a natural frequency that matches the optimum rotational speed region, and in this case, the configuration of the intake system may be changed. Make it simpler.
（発明の効果）
以上実施例によって詳細に説明したように、この発明に
よる内燃機関の吸気構造にあっては、吸入空気の脈動の
周波数と、ダイヤフラムの固有振動が一致することで、
吸気負圧を増大すべくダイヤフラムが振動し、吸入効果
を高めることができる。(Effects of the Invention) As described above in detail through the embodiments, in the intake structure of an internal combustion engine according to the present invention, the frequency of the pulsation of the intake air matches the natural vibration of the diaphragm, so that
The diaphragm vibrates to increase the intake negative pressure, making it possible to enhance the intake effect.
また、前述の作用をなすダイヤフラムを含む制御手段を
エアクリーナのカバーに設けることで、既存の吸気構造
物の大幅な改変を伴うことな〈実施ができる。Further, by providing a control means including a diaphragm that performs the above-mentioned function on the cover of the air cleaner, the present invention can be implemented without significantly modifying the existing intake structure.
さらに制振手段を設けることで、機関の回転数変化に追
随させてダイヤフラムを振動させることができ、特定の
回転数領域以外での吸入効果も高めることができる。Further, by providing a vibration damping means, the diaphragm can be caused to vibrate in accordance with changes in engine speed, and the suction effect outside a specific speed range can also be enhanced.
第１図はこの発明を適用したエアクリーナおよびその制
御系統を示す説明図である。
（吸気系構造物〉
１・・・エアクリーナ
２・・・エンジン
４・・・カバー
６・・・ダイヤフラム
７・・・アクチュエータ（制振手段）
８・・・回転計（回転数検出手段）
９・・・制御部（制御手段）FIG. 1 is an explanatory diagram showing an air cleaner to which the present invention is applied and its control system. (Intake system structure) 1... Air cleaner 2... Engine 4... Cover 6... Diaphragm 7... Actuator (vibration damping means) 8... Tachometer (rotation speed detection means) 9.・Control unit (control means)
Claims (3)
このダイヤフラムを吸気脈動に応じて振動させるように
したことを特徴とする内燃機関の吸気構造。(1) A diaphragm is installed in the intake system structure of the internal combustion engine,
An intake structure for an internal combustion engine, characterized in that the diaphragm vibrates in response to intake pulsation.
けられていることを特徴とする請求項１記載の内燃機関
の吸気構造。(2) The intake structure for an internal combustion engine according to claim 1, wherein the diaphragm is provided on a cover of an air cleaner.
手段と、内燃機関の回転数を検知する検知手段と、この
検知手段の検知出力に応じて前記制振手段を作動させる
ための制御手段とを備えたことを特徴とする請求項１ま
たは２記載の内燃機関の吸気構造。(3) a damping means for changing the natural frequency of the diaphragm, a detection means for detecting the rotational speed of the internal combustion engine, and a control means for operating the damping means in accordance with the detection output of the detection means; The intake structure for an internal combustion engine according to claim 1 or 2, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32133189A JP2832050B2 (en) | 1989-12-13 | 1989-12-13 | Intake structure of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32133189A JP2832050B2 (en) | 1989-12-13 | 1989-12-13 | Intake structure of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03182624A true JPH03182624A (en) | 1991-08-08 |
| JP2832050B2 JP2832050B2 (en) | 1998-12-02 |
Family
ID=18131399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32133189A Expired - Lifetime JP2832050B2 (en) | 1989-12-13 | 1989-12-13 | Intake structure of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2832050B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007120430A (en) * | 2005-10-28 | 2007-05-17 | Honda Motor Co Ltd | Vehicle air cleaner structure |
-
1989
- 1989-12-13 JP JP32133189A patent/JP2832050B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007120430A (en) * | 2005-10-28 | 2007-05-17 | Honda Motor Co Ltd | Vehicle air cleaner structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2832050B2 (en) | 1998-12-02 |
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