JPS62195452A - Soundproofing cover for electromagnetic type injection valve - Google Patents
Soundproofing cover for electromagnetic type injection valveInfo
- Publication number
- JPS62195452A JPS62195452A JP3556786A JP3556786A JPS62195452A JP S62195452 A JPS62195452 A JP S62195452A JP 3556786 A JP3556786 A JP 3556786A JP 3556786 A JP3556786 A JP 3556786A JP S62195452 A JPS62195452 A JP S62195452A
- Authority
- JP
- Japan
- Prior art keywords
- injection valve
- cover
- rubber
- noise
- soundproof cover
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 239000000446 fuel Substances 0.000 claims description 29
- 239000000945 filler Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 150000002739 metals Chemical class 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
- Details Of Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電磁的に作動してエンジンへ燃料を噴射供給す
る電磁式燃料噴射弁の防音カバーに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a soundproof cover for an electromagnetic fuel injection valve that operates electromagnetically to inject and supply fuel to an engine.
近年、自動車の快適性、静粛性を確保するため、車両防
音の低減が試みられているが、その中でも燃料噴射弁の
作動音は比較的高周波数域の騒音が主体的であるため、
車室内へ透過することがあり運転者や同乗者が不快感を
覚え、特に問題視されている。しかるにこの噴射弁の騒
音対策をしようとすると、衝撃発生部（弁座部や弁のス
トロークを決めるストッパの部分）の大きな変更を強い
られ、そのためにかえって噴射弁の性能を損うという不
具合があった。In recent years, attempts have been made to reduce vehicle soundproofing in order to ensure the comfort and quietness of automobiles, but among these efforts, the operating noise of fuel injection valves is mainly noise in a relatively high frequency range.
It is viewed as a particular problem because it can penetrate into the vehicle interior, causing discomfort to the driver and passengers. However, if we try to counteract the noise of this injection valve, we will be forced to make major changes to the shock generating parts (the valve seat and the stopper part that determines the valve stroke), which will actually impair the performance of the injection valve. Ta.
第５図は例えば、実公昭５５−２６５３０号公報に示さ
れるような従来の燃料噴射弁の取付構造を示すものであ
って、防音カバーのない噴射弁の構成を示している。FIG. 5 shows a conventional fuel injection valve mounting structure as disclosed in, for example, Japanese Utility Model Publication No. 55-26530, and shows the structure of the injection valve without a soundproof cover.
燃料噴射弁の衝撃発生部（弁座部や弁のストロークを決
めるストッパの部分）を大きく変更することなく、噴射
弁の性能を損うことなく、噴射弁の作動音を低減する必
要があるという問題点がある。It is necessary to reduce the operating noise of the injector without significantly changing the shock generating part of the fuel injector (the valve seat or the stopper part that determines the valve stroke) and without impairing the performance of the injector. There is a problem.
本発明は、エンジンの吸気管に取付けられた電磁式燃料
噴射弁の外周をすっぽり覆う状態でゴム製防音カバーを
取付け、このゴム製防音カバーの内壁に突起を形成する
か、または、前記ゴム製防音カバーの内側と前記噴射弁
の外周表面との間に多孔質で柔軟な充填材を充填したも
のである。According to the present invention, a rubber soundproof cover is attached to completely cover the outer periphery of an electromagnetic fuel injection valve attached to an intake pipe of an engine, and a protrusion is formed on the inner wall of this rubber soundproof cover, or A porous and flexible filler is filled between the inside of the soundproof cover and the outer peripheral surface of the injection valve.
第１発明においては、噴射弁の周囲に取付けられたゴム
製防音カバーの内壁に設けた突起に噴射弁の作動音が衝
突反射し再びその隣の突起に衝突反射してこれをくり返
し、可成りの量がゴムに吸収され減衰する。In the first invention, the operating sound of the injector collides with a protrusion provided on the inner wall of the rubber soundproof cover attached around the injector and is reflected, and again collides with the protrusion next to the injector and is reflected again, which is repeated. is absorbed by the rubber and attenuated.
また、第２発明においては、ゴム製防音カバーの内側と
噴射弁の外周表面との間に充填した多孔質で柔軟な充填
材により噴射弁の作動音が吸収され低減する。Furthermore, in the second invention, the operating noise of the injection valve is absorbed and reduced by the porous and flexible filler filled between the inside of the rubber soundproof cover and the outer peripheral surface of the injection valve.
以下、本発明を図に示す実施例について説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described.
第１図（ａｌは本発明の第１発明になる電磁式燃料噴射
弁用防音カバーの一実施例の構成を示す要部縦断面図で
、１はエンジンの吸気管２へ図示セぬコンピュータがエ
ンジン回転数及び吸入空気量の信号から適切な時間開弁
じて燃料を噴射する電磁式燃料噴射弁、３はアルミ等金
属製の燃料分岐管であって、図示せぬフューエルポンプ
で圧送された燃料を各噴射弁１へ配給する。５は燃料分
岐管３と一体的に結合されたブラケット４を吸気管２に
固定するボルトである。７は防音カバーで噴射弁１の外
周をすっぽり覆う状態でその先端部を吸気管２に設けた
凹部２ａに挿入して取付けられており、この防音カバー
７の内壁にはくさび状の突起７ａが形成されている。FIG. 1 (al is a longitudinal cross-sectional view of a main part showing the structure of an embodiment of a soundproof cover for an electromagnetic fuel injection valve according to the first invention of the present invention, and 1 is a vertical cross-sectional view of a main part showing the structure of an embodiment of a soundproof cover for an electromagnetic fuel injection valve, which is the first invention of the present invention. An electromagnetic fuel injection valve that injects fuel by opening the valve for an appropriate time based on signals from the engine speed and intake air amount; 3 is a fuel branch pipe made of metal such as aluminum; fuel is pumped by a fuel pump (not shown); is distributed to each injection valve 1. Numeral 5 is a bolt that fixes the bracket 4, which is integrally connected to the fuel branch pipe 3, to the intake pipe 2. Numeral 7 is a bolt that completely covers the outer periphery of the injection valve 1 with a soundproof cover. The soundproof cover 7 is attached by inserting its tip into a recess 2a provided in the intake pipe 2, and a wedge-shaped projection 7a is formed on the inner wall of the soundproof cover 7.
次に上記構成になる本発明電磁式燃料噴射弁用防音カバ
ーの作用について説明する。噴射弁１に周期的な電気信
号が印加されると、噴射弁の開閉をくり返し、弁体のス
トッパ部及び弁座部で金属同志の機械的衝撃が起るため
、比較的高周波の金属打音を発生する。この音は噴射弁
１の外周に伝達し周囲に放射されるが、第１図（ｂ）に
示すように噴射弁１の周囲に取付けられたゴム製防音カ
バー７の内壁に設けた突起７ａに衝突反射し再びその隣
の突起７ａに衝突反射してこれをくり返す。このくり返
しの中に作動音は突起７ａの根元付近まで伝わり、可成
りの量がゴムに吸収され減衰してしまう。結果としてゴ
ム製防音カバーのない状態に比較し噴射弁１の作動音は
より静かなものとなる。第３図は上記の作動音の減衰状
態を示す特性図で、図中Ａは前記第５図図示の従来の防
音カバーの作動音の状態を示し、Ｂは第１図図示の防音
カバーを取付けた場合の作動音の減衰状態を示している
。Next, the operation of the soundproof cover for an electromagnetic fuel injection valve of the present invention having the above structure will be explained. When a periodic electric signal is applied to the injection valve 1, the injection valve repeats opening and closing, and a mechanical impact between metals occurs at the stopper and valve seat of the valve body, resulting in a relatively high-frequency metal tapping sound. occurs. This sound is transmitted to the outer periphery of the injection valve 1 and radiated to the surrounding area, but as shown in FIG. It collides and is reflected, and then it collides and is reflected again to the protrusion 7a next to it, and this process is repeated. During this repetition, the operating sound is transmitted to the vicinity of the base of the protrusion 7a, and a considerable amount is absorbed by the rubber and attenuated. As a result, the operating noise of the injection valve 1 becomes quieter compared to the state without the rubber soundproof cover. FIG. 3 is a characteristic diagram showing the state of attenuation of the above-mentioned operating sound, in which A shows the operating sound state of the conventional soundproof cover shown in FIG. 5, and B shows the state of the soundproof cover with the soundproof cover shown in FIG. This shows the attenuation state of operating sound when
また、この防音カバーのゴムの硬さについては、発明者
らの実験結果によれば、第４図に８曲線にて示す通り、
ゴムの硬さが軟らかいほどよく、ショア硬さで６０以下
にすると十分な音低減効果が得られる。Furthermore, as for the hardness of the rubber of this soundproof cover, according to the inventors' experimental results, as shown by the 8 curve in Fig. 4,
The softer the rubber hardness, the better, and a Shore hardness of 60 or less will provide a sufficient sound reduction effect.
第２図は本発明になる電磁式燃料噴射弁用防音カバーの
第２発明の一実施例の構成を示す要部縦断面図で、前記
第１図図示の電磁式燃料噴射弁と同様に噴射弁１の外周
をすっぽり覆う状態でゴム製防音カバー７を取付け、こ
の防音カバー７の内側と噴射弁１の外周表面との間に、
吸音材としての役割を果す多孔質で柔軟な充填材８、例
えばグラスウールを充填したもので、その他の構成は前
起筆１図図示の第１発明の実施例の構成と同じで、前記
第３図図示のＣ及び第４図図示のＣ曲線に示すような作
動音低減効果が得られる。FIG. 2 is a vertical cross-sectional view of a main part showing the structure of a second embodiment of the soundproof cover for an electromagnetic fuel injection valve according to the invention, and similar to the electromagnetic fuel injection valve shown in FIG. A rubber soundproof cover 7 is attached to completely cover the outer circumference of the valve 1, and between the inside of this soundproof cover 7 and the outer circumferential surface of the injection valve 1,
It is filled with a porous and flexible filler 8 that serves as a sound absorbing material, such as glass wool, and the other configuration is the same as the configuration of the embodiment of the first invention shown in Figure 1 of the previous draft, and as shown in Figure 3 above. The effect of reducing operating noise as shown in the curve C shown in the figure and the curve C shown in FIG. 4 can be obtained.
本発明の第１発明においては、電磁式燃料噴射弁の外周
をすっぽり覆う状態でゴム製防音カバーを取付け、この
ゴム製防音カバーの内壁に突起を形成しであるから、噴
射弁の作動音を吸収して低減させる効果が大であり、ま
た、第２発明においては、電磁式燃料噴射弁の外周をす
っぽり覆う状態でゴム製防音カバーを取付け、この防音
カバーの内側と噴射弁の外周表面との間に多孔質で柔軟
な充填材を充填しであるから、噴射弁の作動音を低減さ
せる効果が大である。In the first aspect of the present invention, a rubber soundproof cover is attached to completely cover the outer periphery of the electromagnetic fuel injection valve, and a protrusion is formed on the inner wall of the rubber soundproof cover to reduce the operating noise of the injection valve. In addition, in the second invention, a rubber soundproof cover is attached to completely cover the outer circumference of the electromagnetic fuel injection valve, and the inside of this soundproof cover and the outer circumferential surface of the injection valve are Since a porous and flexible filler is filled between the holes, it is highly effective in reducing the operating noise of the injection valve.
第１図（ａｌは本発明の第１発明になる電磁式燃料噴射
弁用防音カバーの一実施例の構成を示す要部縦断面図、
第１図（ｂｌは第１図（ａ）図示の防音カバーにおける
作動音低減状態を説明するための要部断面図、第２図は
本発明の第２発明になる電磁式燃料噴射弁用防音カバー
〇一実施例の構成を示す要部断面図、第３図は本発明の
作動音低減効果を説明する特性図、第４図は本発明にお
けるゴムの硬さによる作動音低減効果を説明するための
特性図、第５図は従来の燃料噴射弁の取付構造を示す断
面図である。
１・・・電磁式燃料噴射弁、２・・・吸気管、２ａ・・
・吸気管の凹部、３・・・燃料分岐管、６・・・ゴム部
材、７・・・防音カバー、？ａ・・・突起、８・・・充
填材。FIG. 1 (al is a longitudinal sectional view of a main part showing the structure of an embodiment of a soundproof cover for an electromagnetic fuel injection valve according to the first invention of the present invention,
FIG. 1 (bl is a sectional view of the main part for explaining the operating noise reduction state in the soundproof cover shown in FIG. 1(a), and FIG. 2 is a soundproofing for an electromagnetic fuel injection valve according to the second invention of the present invention. A sectional view of the main parts showing the structure of the embodiment of the cover 〇1, Fig. 3 is a characteristic diagram illustrating the operational noise reduction effect of the present invention, and Fig. 4 illustrates the operation noise reduction effect due to the hardness of the rubber in the present invention. Fig. 5 is a sectional view showing the mounting structure of a conventional fuel injection valve.1...Electromagnetic fuel injection valve, 2...Intake pipe, 2a...
・Recessed part of intake pipe, 3...Fuel branch pipe, 6...Rubber member, 7...Soundproof cover, ? a...Protrusion, 8...Filling material.
Claims (3)
射弁の外周をすっぼり覆う状態でゴム製防音カバーを取
付け、このゴム製防音カバーの内壁に突起を形成したこ
とを特徴とする電磁式燃料噴射弁用防音カバー。(1) An electromagnetic type characterized in that a rubber soundproof cover is attached to completely cover the outer circumference of an electromagnetic fuel injection valve attached to an intake pipe of an engine, and a protrusion is formed on the inner wall of this rubber soundproof cover. Soundproof cover for fuel injection valves.
射弁の外周をすっぼり覆う状態でゴム製防音カバーを取
付け、この防音カバーの内側と前記噴射弁の外周表面と
の間に多孔質で柔軟な充填材を充填したことを特徴とす
る電磁式燃料噴射弁用防音カバー。(2) A rubber soundproof cover is attached to completely cover the outer circumference of the electromagnetic fuel injection valve attached to the intake pipe of the engine, and a porous rubber cover is installed between the inside of this soundproof cover and the outer circumferential surface of the injection valve. A soundproof cover for an electromagnetic fuel injection valve characterized by being filled with a flexible filler.
６０以下であることを特徴とする特許請求の範囲第１項
または第２項に記載の電磁式燃料噴射弁用防音カバー。(3) The soundproof cover for an electromagnetic fuel injection valve according to claim 1 or 2, characterized in that the hardness of the rubber of the soundproof cover is 60 or less in shore hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3556786A JPS62195452A (en) | 1986-02-20 | 1986-02-20 | Soundproofing cover for electromagnetic type injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3556786A JPS62195452A (en) | 1986-02-20 | 1986-02-20 | Soundproofing cover for electromagnetic type injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62195452A true JPS62195452A (en) | 1987-08-28 |
Family
ID=12445329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3556786A Pending JPS62195452A (en) | 1986-02-20 | 1986-02-20 | Soundproofing cover for electromagnetic type injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62195452A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0500139A2 (en) * | 1991-02-22 | 1992-08-26 | Yamaha Hatsudoki Kabushiki Kaisha | Induction system for a multiple valve internal combustion engine |
| US5505166A (en) * | 1993-01-13 | 1996-04-09 | Sanshin Kogyo Kabushiki Kaisha | Induction system for engine |
| JP2001271723A (en) * | 2000-03-29 | 2001-10-05 | Honda Motor Co Ltd | Engine with injector soundproof cover |
| JP2004239102A (en) * | 2003-02-04 | 2004-08-26 | Honda Motor Co Ltd | Installing structure of fuel injector for engine |
| JP2004360626A (en) * | 2003-06-06 | 2004-12-24 | Hitachi Unisia Automotive Ltd | Fuel injection valve |
| WO2005083259A1 (en) | 2004-02-27 | 2005-09-09 | Keihin Corporation | Electromagnetic fuel injection valve |
| JP2006150191A (en) * | 2004-11-26 | 2006-06-15 | Honda Motor Co Ltd | Silencer for injector |
| DE10164850B4 (en) * | 2000-03-29 | 2006-06-22 | Honda Giken Kogyo K.K. | Motor for fuel injection unit; has vibration protection cover for injection device, fuel supply pipe connected to injection unit, cable connected to electrical supply connection and elastic cover |
| US20170356395A1 (en) * | 2016-06-13 | 2017-12-14 | Hyundai Kefico Corporation | Noise reduction type purge control solenoid valve |
-
1986
- 1986-02-20 JP JP3556786A patent/JPS62195452A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0500139A2 (en) * | 1991-02-22 | 1992-08-26 | Yamaha Hatsudoki Kabushiki Kaisha | Induction system for a multiple valve internal combustion engine |
| US5505166A (en) * | 1993-01-13 | 1996-04-09 | Sanshin Kogyo Kabushiki Kaisha | Induction system for engine |
| JP2001271723A (en) * | 2000-03-29 | 2001-10-05 | Honda Motor Co Ltd | Engine with injector soundproof cover |
| DE10164850B4 (en) * | 2000-03-29 | 2006-06-22 | Honda Giken Kogyo K.K. | Motor for fuel injection unit; has vibration protection cover for injection device, fuel supply pipe connected to injection unit, cable connected to electrical supply connection and elastic cover |
| DE10114274B4 (en) * | 2000-03-29 | 2009-04-09 | Honda Giken Kogyo K.K. | Engine with soundproof cover for an injection device |
| JP2004239102A (en) * | 2003-02-04 | 2004-08-26 | Honda Motor Co Ltd | Installing structure of fuel injector for engine |
| JP2004360626A (en) * | 2003-06-06 | 2004-12-24 | Hitachi Unisia Automotive Ltd | Fuel injection valve |
| WO2005083259A1 (en) | 2004-02-27 | 2005-09-09 | Keihin Corporation | Electromagnetic fuel injection valve |
| JP2006150191A (en) * | 2004-11-26 | 2006-06-15 | Honda Motor Co Ltd | Silencer for injector |
| US20170356395A1 (en) * | 2016-06-13 | 2017-12-14 | Hyundai Kefico Corporation | Noise reduction type purge control solenoid valve |
| CN107489808A (en) * | 2016-06-13 | 2017-12-19 | 现代凯菲克株式会社 | Lower noise type purification control magnetic valve |
| US11821391B2 (en) * | 2016-06-13 | 2023-11-21 | Hyundai Kefico Corporation | Noise reduction type purge control solenoid valve |
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