JP2003269187A - Sound insulating structure of engine - Google Patents
Sound insulating structure of engineInfo
- Publication number
- JP2003269187A JP2003269187A JP2002074955A JP2002074955A JP2003269187A JP 2003269187 A JP2003269187 A JP 2003269187A JP 2002074955 A JP2002074955 A JP 2002074955A JP 2002074955 A JP2002074955 A JP 2002074955A JP 2003269187 A JP2003269187 A JP 2003269187A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- sound insulation
- pressure pipes
- pressure
- fuel injection
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エンジンの遮音構
造、特に、各気筒の燃料噴射ノズルに高圧の燃料を分配
供給するよう配設された高圧管から発生する騒音を低減
するための遮音構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation structure for an engine, and more particularly to a sound insulation structure for reducing noise generated from a high pressure pipe arranged to distribute and supply high pressure fuel to fuel injection nozzles of each cylinder. Regarding
【０００２】[0002]
【従来の技術】エンジンの騒音を低減する技術として、
例えば特開平２００１−９８９５４号公報には、高圧燃
料噴射ポンプ或いはコモンレールの上方を遮音カバーで
覆うものが開示されている。また、実公昭５７−７７７
９号公報には、エンジン本体とそれに近接する付属装
置、部品との間に間隙にある場合に、エンジン作動時に
おいて定在波が生起することによってエンジン騒音が増
長されるのを防ぐために、それら間隙に吸音材を充填す
るものが開示されている。2. Description of the Related Art As a technique for reducing engine noise,
For example, Japanese Patent Laid-Open No. 2001-98954 discloses a high-pressure fuel injection pump or a common rail covered with a sound insulating cover. In addition, actual public Sho 57-777
No. 9 discloses that in order to prevent the engine noise from being increased by the occurrence of standing waves when the engine is operating, when there is a gap between the engine body and accessory devices and parts adjacent thereto, It is disclosed that the gap is filled with a sound absorbing material.
【０００３】[0003]
【発明が解決しようとする課題】エンジン、特にディー
ゼルエンジンの低騒音化のニーズは近年非常に高まって
いる。一方、ディーゼルエンジンのエミッションクリー
ン化は環境面で大きな問題となっている。また、それと
は別に、ディーゼルエンジンの燃料噴射システムとし
て、コモンレール式の燃料噴射システムの採用が近年増
えつつある。コモンレール式の燃料噴射システムは、高
圧燃料噴射ポンプにて加圧し高圧にした燃料をコモンレ
ールに蓄え、複数の高圧管を介して各気筒の燃料噴射弁
に高圧燃料を分配供給し、それら各気筒の燃料噴射弁を
電子制御により開閉させるよう構成したものであって、
噴射量、噴射時期、噴射圧力を電気的に制御することが
可能で、制御性に優れている。The need for noise reduction of engines, especially diesel engines, has increased significantly in recent years. On the other hand, making emission clean of diesel engines has become a major environmental issue. In addition to this, the adoption of a common rail fuel injection system has been increasing in recent years as a fuel injection system for diesel engines. The common rail type fuel injection system stores high pressure fuel that is pressurized by a high pressure fuel injection pump in a common rail and distributes and supplies high pressure fuel to the fuel injection valves of each cylinder through a plurality of high pressure pipes. The fuel injection valve is configured to open and close by electronic control,
The injection amount, injection timing, and injection pressure can be electrically controlled, and the controllability is excellent.
【０００４】ところで、ディーゼルエンジンのエミッシ
ョンクリーン化に結び付く技術の一つに、燃料噴射圧力
の高圧化があり、コモンレール式の燃料噴射システムを
採用する場合も、燃料噴射圧力をより高圧にしたいとい
う要求がある。しかし、燃料噴射圧力を高圧化すると、
エミッションクリーン化の面では利点が有るが、反面、
コモンレール式の燃料噴射システムでは、高圧燃料噴射
ポンプにより加圧されコモンレールにて蓄圧された高圧
燃料が脈動しながら高圧管を経由して各気筒の燃料噴射
弁に分配供給されるため、その各気筒の燃料噴射弁に高
圧燃料を分配供給する肉厚の薄い複数の高圧管の全周か
ら、高圧燃料の脈動に伴って騒音が発生し、その脈動に
伴う騒音が、燃料圧力の高圧化により一層大きくなると
いう問題が発生する。そのため、コモンレール式の燃料
噴射システムを採用したエンジンにおいて燃料噴射圧力
の一層の高圧化を図るためには、高圧燃料の脈動に伴っ
て高圧管の全周から発生する騒音を確実に低減できる技
術が必要となる。By the way, one of the technologies leading to the emission clean of a diesel engine is to increase the fuel injection pressure. Even when a common rail fuel injection system is adopted, there is a demand for higher fuel injection pressure. There is. However, if the fuel injection pressure is increased,
There are advantages in terms of emission clean, but on the other hand,
In the common-rail fuel injection system, the high-pressure fuel pressurized by the high-pressure fuel injection pump and accumulated in the common rail is pulsatingly supplied to the fuel injection valves of the respective cylinders through the high-pressure pipes. The high-pressure fuel pulsates to generate noise from the entire circumference of a plurality of thin high-pressure pipes that distribute and supply high-pressure fuel to the fuel injection valve, and the noise due to the pulsation is further increased by increasing the fuel pressure. The problem that it becomes large occurs. Therefore, in order to further increase the fuel injection pressure in an engine that employs a common rail fuel injection system, there is a technology that can reliably reduce the noise generated from the entire circumference of the high pressure pipe due to the pulsation of the high pressure fuel. Will be needed.
【０００５】騒音を低減する方法としては、上記特開平
２００１−９８９５４号公報にあるように、遮音部材等
で覆ってしまうのが一般的である。そして、コモンレー
ル式燃料噴射システムの場合に、騒音源である複数の高
圧管は、レイアウト上の制約があり、また、各気筒への
長さを等しくする必要があって、３次元的に屈曲し、か
つ、各々の高圧管がそれぞれ異なる形状になっているた
め、上記特開平２００１−９８９５４号公報に開示され
ているような遮音部材を使用して複数の高圧管を上方か
らすべて覆ってしまうのが手っ取り早い。しかし、その
ように単に上方から騒音源を覆うように遮音部材を設け
る場合、充分な遮音効果を得ようとすると、遮音部材は
相当な厚みが必要で大型化が避けられないという問題が
生じる。As a method for reducing noise, it is common to cover with a sound insulating member or the like, as disclosed in Japanese Patent Laid-Open No. 2001-98954. In the case of the common rail fuel injection system, the plurality of high-pressure pipes, which are noise sources, have layout restrictions, and the lengths of the cylinders must be equal to each other. Moreover, since each high-pressure pipe has a different shape, a plurality of high-pressure pipes are entirely covered from above by using a sound insulating member as disclosed in Japanese Patent Laid-Open No. 2001-98954. Is quick. However, in the case where the sound insulation member is simply provided so as to cover the noise source from above, if a sufficient sound insulation effect is to be obtained, the sound insulation member needs to have a considerable thickness, so that there is a problem that an increase in size cannot be avoided.
【０００６】また、上記実公昭５７−７７７９公報に開
示されているような、エンジン本体とそれに近接する付
属装置や部品との間隙に吸音材を充填する方法は、定在
波の抑止による騒音低減には有効ではあっても、コモン
レール式燃料噴射システムの複数の高圧管の全周から発
生する騒音を遮音する手段とはならない。コモンレール
式燃料噴射システムの高圧管から発生する騒音は、定在
波とは異なり、エンジン本体と高圧管との間隙に吸音材
を充填しても低減できない。また、複数の高圧管の間の
間隙に吸音材を充填するにしても、コモンレール式燃料
噴射システムの３次元的に屈曲し各々異なる複雑な形状
になっている複数の高圧管に対して、それら高圧管の間
隙にことごとく吸音材を充填することは容易でなく、ま
た、充填できたとしても、騒音は高圧管の全周から発生
するので、充分な騒音低減効果を得ることはできない。Further, the method of filling the gap between the engine body and the auxiliary equipment or parts adjacent thereto with a sound absorbing material as disclosed in Japanese Utility Model Publication No. 57-7779, reduces noise by suppressing standing waves. However, it is not effective as a means for insulating noise generated from the entire circumference of the high pressure pipes of the common rail fuel injection system. Unlike the standing wave, the noise generated from the high-pressure pipe of the common rail fuel injection system cannot be reduced even by filling the gap between the engine body and the high-pressure pipe with a sound absorbing material. In addition, even if the space between a plurality of high pressure pipes is filled with a sound absorbing material, the high pressure pipes of the common rail fuel injection system are bent three-dimensionally and have different complicated shapes. It is not easy to fill all the gaps in the high-pressure pipe with the sound absorbing material, and even if the gap can be filled, noise is generated from the entire circumference of the high-pressure pipe, so a sufficient noise reduction effect cannot be obtained.
【０００７】したがって、燃料噴射ノズルに高圧の燃料
を分配供給する複数の高圧管の全周から発生する騒音を
確実に低減できるとともに、遮音部材を容易に装着でき
且つコンパクトに形成できるようにすることが課題であ
る。そして、その課題を解決することが本発明の目的で
ある。Therefore, it is possible to surely reduce the noise generated from the entire circumferences of a plurality of high-pressure pipes that distribute and supply high-pressure fuel to the fuel injection nozzle, and to easily mount the sound insulation member and make it compact. Is an issue. And it is an object of the present invention to solve the problem.
【０００８】[0008]
【課題を解決するための手段】本発明は、各気筒の燃料
噴射ノズルに高圧の燃料を分配供給する複数の高圧管を
備えたエンジンにおいて、上記複数の高圧管をエンジン
外方から覆うとともにそれら複数の高圧管の間に介在す
るよう遮音部材を設けたことを特徴とするエンジンの遮
音構造を提供する。SUMMARY OF THE INVENTION The present invention is an engine provided with a plurality of high-pressure pipes for distributing and supplying high-pressure fuel to the fuel injection nozzles of each cylinder. A sound insulation structure for an engine, wherein a sound insulation member is provided so as to be interposed between a plurality of high pressure pipes.
【０００９】この遮音構造は、複数の高圧管をエンジン
外方から覆うとともにそれら複数の高圧管の間に介在す
るよう遮音部材を設けたことにより、燃料噴射ノズルに
高圧の燃料を分配供給する複数の高圧管の全周から発生
する騒音を確実に遮音するようにできる。そして、単に
複数の高圧管をエンジン外方から覆うだけでなく、高圧
管の間隙に遮音部材を介在させるので、コンパクトに形
成でき、且つ、充分な遮音効果を得るようにできる。In this sound insulation structure, a plurality of high pressure pipes are covered from the outside of the engine, and a sound insulation member is provided so as to intervene between the plurality of high pressure pipes. The noise generated from the entire circumference of the high-pressure pipe can be reliably blocked. Further, not only the plurality of high-pressure pipes are covered from the outside of the engine, but also the sound insulation member is interposed in the gap between the high-pressure pipes, so that it can be made compact and a sufficient sound insulation effect can be obtained.
【００１０】また、本発明は、各気筒の燃料噴射ノズル
に高圧の燃料を分配供給する複数の高圧管を備えたエン
ジンにおいて、上記複数の高圧管の形状に合わせて形成
された凹部を有し上記複数の高圧管をエンジン外方から
覆うとともにそれら複数の高圧管を上記凹部に嵌まり込
ませる遮音部材を設けたことを特徴とするエンジンの遮
音構造を提供する。Further, according to the present invention, in an engine having a plurality of high-pressure pipes for distributing and supplying high-pressure fuel to the fuel injection nozzles of each cylinder, the engine has a recess formed in conformity with the shape of the plurality of high-pressure pipes. A sound insulation structure for an engine, comprising: a sound insulation member that covers the plurality of high-pressure tubes from the outside of the engine and that fits the plurality of high-pressure tubes into the recesses.
【００１１】この遮音構造は、複数の高圧管の形状に合
わせて形成された凹部を有し上記複数の高圧管をエンジ
ン外方から覆うとともにそれら複数の高圧管を上記凹部
に嵌まり込ませる遮音部材を設けたことにより、複数の
高圧管が遮音部材によりエンジン外方から覆われるとと
もに、複数の高圧管が遮音部材の凹部に嵌まり込むた
め、遮音効果が高く、燃料噴射ノズルに高圧の燃料を分
配供給する複数の高圧管の全周から発生する騒音を確実
に遮音するようにでき、かつ、コンパクトに形成でき
る。また、遮音部材は凹部に複数の高圧管を嵌まり込ま
せるよう装着するので、装着が容易である。This sound insulation structure has a recess formed in conformity with the shape of the plurality of high-pressure pipes, and covers the plurality of high-pressure pipes from the outside of the engine and fits the plurality of high-pressure pipes into the recesses. By providing the member, the plurality of high-pressure pipes are covered from the outside of the engine by the sound insulation member, and the plurality of high-pressure pipes are fitted in the recesses of the sound insulation member. The noise generated from the entire circumference of the plurality of high-pressure pipes that are distributed and supplied can be surely insulated, and can be made compact. Further, since the sound insulation member is mounted so that a plurality of high-pressure pipes are fitted in the recess, it is easy to mount.
【００１２】また、上記遮音構造において、遮音部材
は、複数の高圧管の間の空間を埋めるように形成するの
がよく、それにより、遮音部材による高圧管の制振作用
を高めることができ、また、水の飛散に対する対食性を
向上させることができる。In the sound insulation structure, the sound insulation member is preferably formed so as to fill the space between the plurality of high pressure pipes, whereby the vibration insulation effect of the high pressure pipe by the sound insulation member can be enhanced. Further, it is possible to improve the corrosion resistance against water splash.
【００１３】また、上記遮音部材は一体物で形成するの
がよく、それにより、遮音部材の装着が一層容易とな
る。Further, it is preferable that the sound insulation member is formed as an integral body, which makes it easier to mount the sound insulation member.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１〜図３は本発明の実施の形態の一例を
示す。図１は遮音構造を示すエンジン全体の斜視図、図
２は遮音部材の構造および配置を示す断面図、図３は遮
音部材の凹部構造を示すを斜視図である。1 to 3 show an example of an embodiment of the present invention. FIG. 1 is a perspective view of the entire engine showing a sound insulation structure, FIG. 2 is a sectional view showing the structure and arrangement of a sound insulation member, and FIG. 3 is a perspective view showing a recessed structure of the sound insulation member.
【００１６】この実施の形態のエンジンは、４気筒の直
噴式ディーゼルエンジンで、図１に示すように、エンジ
ン本体１の上部には、気筒毎にピストン上部の燃焼室凹
部に直接燃料を噴射する燃料噴射ノズル（図示せず）を
備えた４本の燃料噴射弁２が配設されている（図１には
エンジン本体１のシリンダヘッドカバーの部分に燃料噴
射弁２の上端が現れている）。これら燃料噴射弁２は、
電子制御により電磁式の針弁を駆動し燃料噴射ノズルを
開閉させるもので、噴射量、噴射時期、噴射圧力を電気
的に制御可能である。そして、高圧燃料噴射ポンプ（図
示せず）にて加圧し高圧にした燃料を蓄えるコモンレー
ル３が、エンジン本体１の一側に気筒列方向に長い配置
で設けられ、このコモンレール３から各気筒の燃料噴射
弁２に高圧燃料を分配供給するよう、コモンレール３と
各気筒の燃料噴射弁２の間に長さが略等しい４本の高圧
管４が曲折して配設されている。The engine of this embodiment is a 4-cylinder direct injection type diesel engine. As shown in FIG. 1, in the upper part of the engine body 1, the fuel is directly injected into the combustion chamber concave part above the piston for each cylinder. Four fuel injection valves 2 provided with fuel injection nozzles (not shown) are arranged (in FIG. 1, the upper end of the fuel injection valve 2 appears at the cylinder head cover portion of the engine body 1). These fuel injection valves 2 are
The electronically controlled solenoid valve is driven to open and close the fuel injection nozzle, and the injection amount, injection timing, and injection pressure can be electrically controlled. Then, a common rail 3 for storing the fuel pressurized to a high pressure by a high-pressure fuel injection pump (not shown) is provided on one side of the engine body 1 in a long arrangement in the cylinder row direction. Four high pressure pipes 4 having substantially the same length are bent and arranged between the common rail 3 and the fuel injection valves 2 of the respective cylinders so as to distribute and supply the high pressure fuel to the injection valves 2.
【００１７】そして、それら４本の高圧管４をエンジン
外方から覆うとともに各高圧管４の間に介在して、隣接
する高圧管４の間の空間を埋めるよう、エンジン本体１
の上方から遮音部材５が装着されている。Then, the four main high-pressure pipes 4 are covered from the outside of the engine and are interposed between the high-pressure pipes 4 so that the space between the high-pressure pipes 4 adjacent to each other is filled up.
The sound insulation member 5 is attached from above.
【００１８】上記遮音部材５は、ウレタン成形あるいは
ゴム成形等による一体物で、図２および図３に示すよう
に、高圧管４の形状に合わせて形成された凹部６を有
し、４本の高圧管４が凹部６に嵌まり込んで、それら高
圧管４の間の空間を遮音部材５が埋めるように形成した
ものである。この遮音部材５は、別途固定手段を設けて
もよいが、通常は見栄えカバー（図示せず）がエンジン
上方を覆うように配置されることにより固定される。The sound insulating member 5 is an integral member formed by urethane molding, rubber molding, or the like, and has a recess 6 formed in conformity with the shape of the high-pressure pipe 4 as shown in FIGS. The high-pressure pipe 4 is fitted in the recess 6 so that the space between the high-pressure pipes 4 is filled with the sound insulation member 5. The sound insulation member 5 may be provided with a separate fixing means, but is normally fixed by disposing a good-looking cover (not shown) so as to cover the upper side of the engine.
【００１９】こうしてエンジン本体１と遮音部材５とで
４本の高圧管４の全周を覆う遮音構造をコンパクトに形
成でき、高圧管４の全周から発生する騒音を確実に低減
できる。また、遮音部材５は凹部６に高圧管４を嵌まり
込ませるよう装着するので、装着が容易である。そし
て、遮音部材５が４本の高圧管４の間の空間を埋めるこ
とにより、高圧管４の振動を抑制することができ、ま
た、水の飛散による腐食を防止することができる。In this manner, the engine body 1 and the sound insulating member 5 can compactly form a sound insulating structure that covers the entire circumference of the four high-pressure pipes 4, and noise generated from the entire circumference of the high-pressure pipe 4 can be reliably reduced. Further, since the sound insulation member 5 is mounted so that the high pressure pipe 4 is fitted in the recess 6, the mounting is easy. Then, the sound insulation member 5 fills the space between the four high-pressure pipes 4, whereby the vibration of the high-pressure pipe 4 can be suppressed, and the corrosion due to the scattering of water can be prevented.
【００２０】なお、この例では、遮音部材５の凹部６
は、図２に示す構造では高圧管４が嵌まり込むことによ
り高圧管４側方の空間を埋めるよう形成され、遮音部材
５の内面に対し略直角に開口させているが、これを、図
４に示すように、高圧管４下部の空間も埋めるよう、遮
音部材５の内面に対し鋭角に開口させてることも可能で
ある。In this example, the recess 6 of the sound insulation member 5 is used.
In the structure shown in FIG. 2, the high-pressure pipe 4 is fitted so as to fill the space on the side of the high-pressure pipe 4 and is opened substantially at a right angle to the inner surface of the sound insulation member 5. As shown in FIG. 4, it is also possible to open the sound insulation member 5 at an acute angle so as to fill the space below the high-pressure pipe 4.
【００２１】また、上記実施の形態では４気筒の直噴式
ディーゼルエンジンの場合を説明したが、本発明は４気
筒以外の他の多気筒エンジンにも適用でき、直噴以外の
ディーゼルエンジンおよびガソリンエンジン等、様々に
適用可能である。Further, although the case of the 4-cylinder direct injection type diesel engine has been described in the above embodiment, the present invention can be applied to a multi-cylinder engine other than the 4-cylinder engine, and a diesel engine and a gasoline engine other than the direct injection type. And so on.
【００２２】[0022]
【発明の効果】以上の説明から明らかなように、本発明
の遮音構造は、燃料噴射ノズルに高圧の燃料を分配供給
するよう配設された複数の高圧管の全周を、エンジン本
体と遮音部材とで覆うことにより、それら高圧管から発
生する騒音を確実に低減することができるとともに、遮
音部材を容易に装着でき、且つ、コンパクトに形成でき
る。As is clear from the above description, the sound insulation structure of the present invention provides sound insulation between the engine main body and the entire circumference of a plurality of high pressure pipes arranged to distribute and supply high-pressure fuel to the fuel injection nozzles. By covering with a member, noise generated from these high-pressure pipes can be surely reduced, and the sound insulating member can be easily mounted and can be made compact.
【図１】本発明の実施の形態の遮音構造を示すエンジン
全体の斜視図である。FIG. 1 is a perspective view of an entire engine showing a sound insulation structure according to an embodiment of the present invention.
【図２】本発明の実施の形態のエンジンの遮音部材の構
造および配置を示す断面図である。FIG. 2 is a cross-sectional view showing the structure and arrangement of the sound insulation member of the engine according to the embodiment of the present invention.
【図３】本発明の実施の形態のエンジンの遮音部材の凹
部構造を示す斜視図である。FIG. 3 is a perspective view showing a recess structure of the sound insulation member of the engine according to the embodiment of the present invention.
【図４】本発明の実施の形態のエンジンの遮音部材の他
の例の構造および配置を示す断面図である。FIG. 4 is a cross-sectional view showing the structure and arrangement of another example of the sound insulation member for the engine according to the embodiment of the present invention.
１ エンジン本体 ２ 燃料噴射弁 ３ コモンレール ４ 高圧管 ５ 遮音部材 ６ 凹部 1 engine body 2 fuel injection valve 3 common rail 4 high pressure pipe 5 Sound insulation member 6 recess
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小川 英二 広島県安芸郡府中町新地３番１号 マツダ 株式会社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Eiji Ogawa 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Within the corporation
Claims (4)
分配供給する複数の高圧管を備えたエンジンにおいて、
上記複数の高圧管をエンジン外方から覆うとともにそれ
ら複数の高圧管の間に介在するよう遮音部材を設けたこ
とを特徴とするエンジンの遮音構造。1. An engine provided with a plurality of high-pressure pipes for distributing and supplying high-pressure fuel to a fuel injection nozzle of each cylinder,
A sound insulation structure for an engine, characterized in that a sound insulation member is provided so as to cover the plurality of high pressure pipes from the outside of the engine and to intervene between the plurality of high pressure pipes.
分配供給する複数の高圧管を備えたエンジンにおいて、
上記複数の高圧管の形状に合わせて形成された凹部を有
し上記複数の高圧管をエンジン外方から覆うとともにそ
れら複数の高圧管を上記凹部に嵌まり込ませる遮音部材
を設けたことを特徴とするエンジンの遮音構造。2. An engine provided with a plurality of high-pressure pipes for distributing high-pressure fuel to fuel injection nozzles of each cylinder,
A sound insulating member is provided which has a recess formed in conformity with the shape of the plurality of high-pressure pipes, covers the plurality of high-pressure pipes from the outside of the engine, and fits the plurality of high-pressure pipes into the recesses. Sound insulation structure for the engine.
空間を埋めるように形成されていることを特徴とする、
請求項１または２に記載のエンジンの遮音構造。3. The sound insulating member is formed so as to fill a space between the plurality of high pressure pipes.
The sound insulation structure for the engine according to claim 1.
ことを特徴とする、請求項１、２または３に記載のエン
ジンの遮音構造。4. The sound insulation structure for an engine according to claim 1, 2 or 3, wherein the sound insulation member is formed as an integral body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002074955A JP4238510B2 (en) | 2002-03-18 | 2002-03-18 | Engine sound insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002074955A JP4238510B2 (en) | 2002-03-18 | 2002-03-18 | Engine sound insulation structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003269187A true JP2003269187A (en) | 2003-09-25 |
| JP4238510B2 JP4238510B2 (en) | 2009-03-18 |
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ID=29204211
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002074955A Expired - Fee Related JP4238510B2 (en) | 2002-03-18 | 2002-03-18 | Engine sound insulation structure |
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| Country | Link |
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| JP (1) | JP4238510B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013222765A1 (en) * | 2012-11-08 | 2014-05-08 | Honda Motor Co., Ltd. | Cover structure for internal combustion engine for passenger vehicle, has sound insulation cover arranged in space between motor cover and cylinder head and covering passenger compartment side of fuel supply section |
| DE102014221662A1 (en) * | 2013-10-25 | 2015-04-30 | Honda Motor Co., Ltd. | Sound-insulating structure of an internal combustion engine |
| CN107208551A (en) * | 2015-02-02 | 2017-09-26 | 本田技研工业株式会社 | The sound-insulating structure of internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821340A (en) * | 1994-06-27 | 1996-01-23 | Robert Bosch Gmbh | Fuel injector for internal combustion engine |
-
2002
- 2002-03-18 JP JP2002074955A patent/JP4238510B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821340A (en) * | 1994-06-27 | 1996-01-23 | Robert Bosch Gmbh | Fuel injector for internal combustion engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013222765A1 (en) * | 2012-11-08 | 2014-05-08 | Honda Motor Co., Ltd. | Cover structure for internal combustion engine for passenger vehicle, has sound insulation cover arranged in space between motor cover and cylinder head and covering passenger compartment side of fuel supply section |
| DE102013222765B4 (en) * | 2012-11-08 | 2014-12-24 | Honda Motor Co., Ltd. | Cover structure for an internal combustion engine |
| DE102014221662A1 (en) * | 2013-10-25 | 2015-04-30 | Honda Motor Co., Ltd. | Sound-insulating structure of an internal combustion engine |
| DE102014221662B4 (en) * | 2013-10-25 | 2015-09-24 | Honda Motor Co., Ltd. | Sound-insulating structure of an internal combustion engine |
| CN107208551A (en) * | 2015-02-02 | 2017-09-26 | 本田技研工业株式会社 | The sound-insulating structure of internal combustion engine |
| CN107208551B (en) * | 2015-02-02 | 2019-07-30 | 本田技研工业株式会社 | The sound-insulating structure of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4238510B2 (en) | 2009-03-18 |
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