JP2003201936A - Installing structure for fuel injection valve - Google Patents
Installing structure for fuel injection valveInfo
- Publication number
- JP2003201936A JP2003201936A JP2001399425A JP2001399425A JP2003201936A JP 2003201936 A JP2003201936 A JP 2003201936A JP 2001399425 A JP2001399425 A JP 2001399425A JP 2001399425 A JP2001399425 A JP 2001399425A JP 2003201936 A JP2003201936 A JP 2003201936A
- Authority
- JP
- Japan
- Prior art keywords
- injection valve
- fuel injection
- mounting member
- cylinder head
- tip
- 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
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、気筒内直接噴射式
内燃機関のシリンダヘッドに装着される燃料噴射弁の取
付構造に関する。
【０００２】
【従来の技術】このような燃料噴射弁の取付構造とし
て、特開平１０−３１８０９３号公報や特開２０００−
９０００号公報に開示されたものがある。
【０００３】図６は従来の気筒内直接噴射式内燃機関の
シリンダヘッドに装着される燃料噴射弁の取付構造の一
例を示す縦断面図である。この図において、01はシリン
ダヘッド、02は燃焼室であり、03は上記シリンダヘッド
01に穿設された噴射弁装着孔、04はその噴射弁装着孔03
に装着された燃料噴射弁である。
【０００４】上記燃料噴射弁04は大径の本体ボディ部05
と小径の先端ノズル部06を有し、その先端ノズル部06に
は燃料噴射孔が設けられている。また噴射弁装着孔03の
方も、上記燃料噴射弁04に対応して大径部03ａと小径部
03ｂより成るが、小径部03ｂの径は先端ノズル部06の径
よりも大きい。
【０００５】上記燃料噴射弁04は、噴射弁装着孔03の小
径部03ｂに先端ノズル部06がシリンダヘッド01と隙間を
へだてて挿入され、本体ボディ部05の下面を噴射弁装着
孔03の大径部03ａと小径部03ｂとの段差部に当接して固
定される。その際、燃料噴射弁04の先端ノズル部06の最
先端付近の外周に円周溝06ｂを設けて樹脂製のシールリ
ング09を嵌装し、シリンダヘッド01の噴射弁装着孔小径
部03ｂに所定の締め代をもって取付けることにより、燃
焼ガスが燃焼室02から漏出するのをシールする。
【０００６】
【解決しようとする課題】図６に示された従来の燃料噴
射弁04取付構造では、燃料噴射弁04の先端ノズル部06が
燃焼ガスに曝される面積を最小限にして、燃料噴射孔部
の温度を低く抑えることはできるが、シリンダヘッド01
の噴射弁装着孔小径部03ｂの内面の面粗度等を厳しく管
理する必要があるので、コスト高となる。また、市場に
おけるメンテナンスの際、燃料噴射弁04着脱時にシール
面に異物が混入して傷が生じ、樹脂製シールリング09の
シール保証が困難であるという問題があった。
【０００７】
【課題を解決するための手段および効果】前記従来の課
題を解決するために、本発明は、気筒内直接噴射式内燃
機関のシリンダヘッドに装着される燃料噴射弁の取付構
造であって、筒状の先端部が上記燃料噴射弁の先端ノズ
ル部を間隔をへだてて囲繞するとともに、基端部が上記
燃料噴射弁の本体ボディ部に固着された噴射弁取付部材
と、上記燃料噴射弁の先端ノズル部最先端近傍の外周と
上記噴射弁取付部材の先端部内周との間に嵌装されたシ
ール部材とを備え、上記シリンダヘッドに設けられた噴
射弁装着孔に上記噴射弁取付部材の先端部が螺着される
ようにしたことを特徴とするものである。
【０００８】本発明は上記のとおり構成され、燃料噴射
弁の本体ボディ部に基端部が固着された噴射弁取付部材
の先端部が、シリンダヘッドに設けられた噴射弁装着孔
に螺着されるので、燃料噴射弁がシリンダヘッドに強固
に固定されるばかりでなく、シリンダヘッドと噴射弁取
付部材との間の気密性もこの螺旋部により確保される。
また、燃料噴射弁の先端ノズル部外周と噴射弁取付部材
の先端部内周との間にシール部材が嵌装されるので、燃
料噴射弁と噴射弁取付部材との間の気密性も確保され
る。
【０００９】さらに本発明では、上記シール部材が燃料
噴射弁の先端ノズル部最先端近傍と噴射弁取付部材の先
端部との間に嵌装されるので、燃料噴射弁の先端ノズル
部が高温の燃焼ガスに曝される面積が最小限に抑えら
れ、かつ噴射弁取付部材および噴射弁取付部材とシール
部材との間に形成される空気層によって、シリンダヘッ
ドから燃料噴射弁の先端ノズル部への熱伝達を低減させ
ることができ、燃料噴射弁の先端ノズル部の温度上昇が
抑制されて、燃料噴射孔のカーボン付着やそれによる流
量低下が防止される。
【００１０】また燃料噴射弁の本体ボディ部に固着され
た噴射弁取付部材の先端部が燃料噴射弁の先端ノズル部
を間隔をへだてて囲繞し、その間にシール部材が嵌装さ
れるので、燃料噴射弁の保管、運搬、あるいはシリンダ
ヘッドへの着脱に際して、燃料噴射弁の先端ノズル部は
常に噴射弁取付部材によって保護されており、締付け等
による外力や万一の衝撃力が加わっても、それらの力は
シール部材によって吸収され、極めて高い精度が要求さ
れる先端ノズル部の燃料噴射孔近傍に直接作用する恐れ
はなく、したがって歪発生による燃料噴射の悪化を招く
こともない。
【００１１】
【発明の実施の形態】図１は本発明による気筒内直接噴
射式内燃機関のシリンダヘッドに装着される燃料噴射弁
の取付構造の一例を示す縦断面図である。この図におい
て、１はシリンダヘッド、２は燃焼室であり、３は上記
シリンダヘッド１に穿設された噴射弁装着孔、４はその
噴射弁装着孔３に装着された燃料噴射弁である。
【００１２】燃料噴射弁４は大径の本体ボディ部５と小
径の先端ノズル部６を有し、その先端ノズル部６には燃
料噴射孔６ａが設けられている。そして本体ボディ部５
にフランジ７が形成されている。また噴射弁装着孔３の
方も、上記燃料噴射弁４に対応して、大径部３ａと小径
部３ｂより成る。
【００１３】本実施例では、燃料噴射弁４とシリンダヘ
ッド１との間に噴射弁取付部材８が介装される。この噴
射弁取付部材８は大径の基端部８ａの上端が上記燃料噴
射弁４の本体ボディ部５に全周溶接（符号11）されると
ともに、小径筒状の先端部８ｂが上記先端ノズル部６を
間隔をへだてて囲繞している。そして先端ノズル部６の
最先端近傍の外周に円周溝６ｂが設けられ、この円周溝
６ｂに樹脂製のシール部材９が嵌装されて、上記噴射弁
取付部材８の先端部８ｂ内周との間を密封している。
【００１４】上記噴射弁取付部材８の筒状先端部８ｂの
外側面にはおねじ８ｃが形成されており、噴射弁装着孔
３の小径部３ｂ内面に形成されためねじ３ｃに、ガスケ
ット10を介装して、ねじ込まれている。こうして燃料噴
射弁４がシリンダヘッド１に装着・固定される。
【００１５】本実施例においては、燃料噴射弁４の本体
ボディ部５に溶接により固着された噴射弁取付部材８の
先端部８ｂがシリンダヘッド１の噴射弁装着孔３小径部
３ｂに螺着されるので、燃料噴射弁４がシリンダヘッド
１に強固に固定されるばかりでなく、シリンダヘッド１
と噴射弁取付部材８との間の気密性もこの螺旋部により
確保される。またその際ガスケット10を介装するので、
この気密性は更に高められる。
【００１６】本実施例ではまた、燃料噴射弁４の先端ノ
ズル部６と噴射弁取付部材８の先端部８ｂとの間にシー
ル部材９が嵌装されるので、燃料噴射弁４と噴射弁取付
部材８との間の気密性も確保される。そして燃料噴射弁
４の本体ボディ部５に噴射弁取付部材８の基端部８ａが
全周溶接されているので、燃料噴射弁４と噴射弁取付部
材８との気密性は更に確実になり、万一シール部材９が
シール性を失っても、燃焼ガスが外部に漏れることはな
い。
【００１７】更に本実施例では、上記シール部材９が燃
料噴射弁４の先端ノズル部６の最先端近傍に配されてい
るので、燃料噴射弁４の先端ノズル部６が燃焼室２内の
高温の燃焼ガスに曝される面積が格段に狭くなり、かつ
噴射弁取付部材８および噴射弁取付部材８と断熱性の高
い樹脂製のシール部材９との間に形成される空気層によ
って、シリンダヘッド１から燃料噴射弁４の先端ノズル
部６への熱伝達を低減させることができ、燃料噴射弁４
の先端ノズル部６の温度上昇が抑制されて、燃料噴射孔
６ａのカーボン付着やそれによる流量低下が防止され
る。
【００１８】本実施例では、燃料噴射弁４の本体ボディ
部５に固着されてシリンダヘッド１に螺着される噴射弁
取付部材８が燃料噴射弁４の先端ノズル部６を空間をへ
だてて囲繞しており、その間に樹脂製のシール部材９が
嵌装されるが、このシール部材９は燃料噴射弁４の製造
時に組付けられており、市場で燃料噴射弁４を保管、運
搬、あるいはシリンダヘッド１へ着脱するに際して、燃
料噴射弁４の先端ノズル部６は常に噴射弁取付部材８に
よって保護されており、締付け等による外力や万一の衝
撃が加わっても、それらの力はシール部材９により吸収
され、極めて高い精度が要求される先端ノズル部６の燃
料噴射孔６ａ近傍に直接影響を及ぼす恐れはなく、した
がって歪発生による燃料噴射の悪化を招くことはない。
また、燃料噴射弁４着脱時でもシール部材９が着脱され
ることはないので、異物の噛込みやシール面の損傷等に
より、気密性が悪化することもない。
【００１９】次に図２は、噴射弁取付部材８の基端部８
ａを燃料噴射弁４の本体ボディ部５に固着する方法の別
の例を示す図である。この実施例では、燃料噴射弁４の
本体ボディ部５下端におねじ５ａが形成される一方、噴
射弁取付部材８の基端部８ａ上端内面にめねじ８ｄが形
成されており、噴射弁取付部材８の基端部８ａが燃料噴
射弁の本体ボディ部５に螺着される。そしてその際、噴
射弁取付部材８の基端部８ａの端面と燃料噴射弁４の本
体ボディ部５のフランジ７との間にシール部材13が嵌装
される。
【００２０】本実施例においては、噴射弁取付部材８の
基端部８ａが燃料噴射弁４の本体ボディ部５に螺着され
るので、噴射弁取付部材８と燃料噴射弁４の本体ボディ
部５との結合は強固である。そして噴射弁取付部材８の
基端部８ａとフランジ７との間にシール部材13が嵌装さ
れるので、前記第１実施例と同様シール部材９の作用を
補って、燃料噴射弁４と噴射弁取付部材８との気密性も
確実に保持される。
【００２１】次に図３は、噴射弁取付部材８の基端部８
ａを燃料噴射弁４の本体ボディ部５に固着する方法の更
に別の例を示す図である。この第３実施例でも、前記第
２の実施例と同様に、燃料噴射弁４の本体ボディ部５の
下端に形成されたおねじ５ａと噴射弁取付部材８の基端
部８ａ上端に形成されためねじ８ｄにより、噴射弁取付
部材８の基端部８ａが燃料噴射弁４の本体ボディ部５に
螺着される。ただしこの実施例では、燃料噴射弁４の大
径の本体ボディ部５と小径の先端ノズル部６との段差部
および噴射弁取付部材８の大径の基端部８ａと小径の先
端部８ｂとの段差部の間にシール部材14が嵌装される。
【００２２】次に図４は、噴射弁取付部材８の基端部８
ａを燃料噴射弁の本体ボディ部５に固着する方法の第４
の例を示す図である。この実施例は、前記第３の実施例
（図３）のように噴射弁取付部材８の基端部８ａを燃料
噴射弁４の本体ボディ部５に螺着する代りに、噴射弁取
付部材８の基端部８ａ上端を燃料噴射弁４のフランジ７
上縁にかしめる（符号12）ことによって、噴射弁取付部
材８を燃料噴射弁４に固着するものである。
【００２３】次に図５は、噴射弁取付部材８の基端部８
ａを燃料噴射弁４の本体ボディ部５に固着する方法の第
５の例を示す図である。この実施例は、前記第３の実施
例（図３）と同様に、噴射弁取付部材８の基端部８ａを
燃料噴射弁４の本体ボディ部５に螺着するものである
が、シール部材15の位置は、燃料噴射弁４と噴射弁取付
部材８の各段差部ではなく、燃料噴射弁４の先端ノズル
部６外周と噴射弁取付部材８の先端部８ｂとの間の前記
シール部材９の上方に設けられる。このようにシール部
材９，15を併設することにより、シール部材９の効果が
補強される。
【００２４】図５では、噴射弁取付部材８の基端部８ａ
が燃料噴射弁４の本体ボディ部５に螺着されているが、
前記図１に示されたように、噴射弁取付部材８の基端部
８ａを燃料噴射弁４の本体ボディ部５に全周溶接しても
よい。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a fuel injection valve mounted on a cylinder head of a direct injection type internal combustion engine. 2. Description of the Related Art Japanese Patent Laid-Open Publication No. 10-318093 and Japanese Patent Laid-Open Publication
There is one disclosed in Japanese Patent Publication No. 9000. FIG. 6 is a longitudinal sectional view showing an example of a mounting structure of a fuel injection valve mounted on a cylinder head of a conventional direct injection type internal combustion engine. In this figure, 01 is a cylinder head, 02 is a combustion chamber, and 03 is the cylinder head.
The injection valve mounting hole drilled at 01, 04 is the injection valve mounting hole 03
It is a fuel injection valve attached to. The fuel injection valve 04 has a large-diameter main body part 05.
And a small-diameter tip nozzle portion 06, and the tip nozzle portion 06 is provided with a fuel injection hole. The injection valve mounting hole 03 also has a large-diameter portion 03a and a small-diameter portion corresponding to the fuel injection valve 04.
The diameter of the small diameter portion 03b is larger than the diameter of the tip nozzle portion 06. [0005] In the fuel injection valve 04, the tip nozzle portion 06 is inserted into the small diameter portion 03b of the injection valve mounting hole 03 with a gap from the cylinder head 01, and the lower surface of the main body portion 05 is enlarged by the large size of the injection valve mounting hole 03. It is fixed in contact with the step between the diameter part 03a and the small diameter part 03b. At this time, a circumferential groove 06b is provided on the outer periphery near the forefront of the tip end nozzle portion 06 of the fuel injection valve 04, a resin seal ring 09 is fitted, and a predetermined diameter is set in the injection valve mounting hole small diameter portion 03b of the cylinder head 01. , The leakage of the combustion gas from the combustion chamber 02 is sealed. [0006] In the conventional fuel injection valve 04 mounting structure shown in FIG. 6, the area where the tip nozzle portion 06 of the fuel injection valve 04 is exposed to the combustion gas is minimized. Although the temperature of the injection hole can be kept low, the cylinder head 01
It is necessary to strictly control the surface roughness and the like of the inner surface of the small-diameter portion 03b of the injection valve mounting hole, which increases the cost. Further, at the time of maintenance in the market, when the fuel injection valve 04 is attached / detached, foreign matter is mixed into the sealing surface to cause damage, and it is difficult to guarantee the sealing of the resin seal ring 09. [0007] In order to solve the above-mentioned conventional problems, the present invention relates to a mounting structure of a fuel injection valve mounted on a cylinder head of an in-cylinder direct injection type internal combustion engine. A fuel injection valve mounting member having a cylindrical distal end portion surrounding the distal end nozzle portion of the fuel injection valve with a space therebetween, and a base end portion fixed to a main body portion of the fuel injection valve; A sealing member fitted between an outer periphery near the tip end of the valve tip nozzle portion and an inner periphery at the tip end of the injector mounting member, wherein the injector is attached to an injector mounting hole provided in the cylinder head. The distal end of the member is screwed. The present invention is configured as described above, and the distal end of an injection valve mounting member having a base end fixed to the main body of the fuel injection valve is screwed into an injection valve mounting hole provided in the cylinder head. Therefore, not only the fuel injection valve is firmly fixed to the cylinder head, but also the airtightness between the cylinder head and the injection valve mounting member is ensured by the spiral portion.
Further, since the seal member is fitted between the outer periphery of the tip nozzle portion of the fuel injection valve and the inner periphery of the tip portion of the injection valve mounting member, airtightness between the fuel injection valve and the injection valve mounting member is also ensured. . Further, in the present invention, since the seal member is fitted between the vicinity of the tip end of the tip end portion of the fuel injection valve and the tip end of the injection valve mounting member, the tip end portion of the fuel injection valve has a high temperature. The area exposed to the combustion gas is minimized, and the injection valve mounting member and the air layer formed between the injection valve mounting member and the seal member allow the cylinder head to move to the tip nozzle portion of the fuel injection valve. The heat transfer can be reduced, and the temperature rise at the tip nozzle portion of the fuel injection valve is suppressed, so that the carbon deposition on the fuel injection hole and the decrease in the flow rate due to it are prevented. [0010] Further, the distal end of the injector mounting member fixed to the main body of the fuel injection valve surrounds the distal end nozzle of the fuel injector with a space therebetween, and the seal member is fitted between them. When the injector is stored, transported, or attached to or detached from the cylinder head, the nozzle at the tip of the injector is always protected by an injector mounting member. This force is absorbed by the seal member, and there is no possibility that the force directly acts on the vicinity of the fuel injection hole of the tip nozzle portion where extremely high accuracy is required, and therefore, the fuel injection is not deteriorated due to distortion. FIG. 1 is a longitudinal sectional view showing an example of a mounting structure of a fuel injection valve mounted on a cylinder head of an in-cylinder direct injection type internal combustion engine according to the present invention. In this figure, 1 is a cylinder head, 2 is a combustion chamber, 3 is an injection valve mounting hole formed in the cylinder head 1, and 4 is a fuel injection valve mounted in the injection valve mounting hole 3. The fuel injection valve 4 has a large-diameter main body 5 and a small-diameter tip nozzle 6, and the tip nozzle 6 is provided with a fuel injection hole 6a. And body 5
Is formed with a flange 7. The injection valve mounting hole 3 also includes a large diameter portion 3a and a small diameter portion 3b corresponding to the fuel injection valve 4. In this embodiment, an injection valve mounting member 8 is interposed between the fuel injection valve 4 and the cylinder head 1. The upper end of the large-diameter base end portion 8a of the injection valve mounting member 8 is welded to the main body 5 of the fuel injection valve 4 all around (reference numeral 11), and the small-diameter cylindrical tip portion 8b is connected to the tip nozzle. The part 6 is surrounded at intervals. A circumferential groove 6b is provided on the outer periphery near the front end of the tip nozzle portion 6, and a resin sealing member 9 is fitted into the circumferential groove 6b, and an inner periphery of the tip portion 8b of the injection valve mounting member 8 is formed. Between the seals. A male screw 8c is formed on the outer surface of the cylindrical distal end portion 8b of the injection valve mounting member 8, and is formed on the inner surface of the small diameter portion 3b of the injection valve mounting hole 3. And is screwed. Thus, the fuel injection valve 4 is mounted and fixed to the cylinder head 1. In this embodiment, a tip 8b of an injection valve mounting member 8 fixed to the main body 5 of the fuel injection valve 4 by welding is screwed into the injection valve mounting hole 3 small diameter portion 3b of the cylinder head 1. Therefore, not only is the fuel injection valve 4 firmly fixed to the cylinder head 1, but also the cylinder head 1
The airtightness between the fuel injection valve and the injection valve mounting member 8 is also ensured by the spiral portion. Also, at that time, since the gasket 10 is interposed,
This tightness is further enhanced. In this embodiment, since the sealing member 9 is fitted between the tip nozzle 6 of the fuel injection valve 4 and the tip 8b of the injection valve mounting member 8, the fuel injection valve 4 and the injection valve mounting Airtightness with the member 8 is also ensured. Since the base end 8a of the injection valve mounting member 8 is welded to the main body 5 of the fuel injection valve 4 over the entire circumference, the airtightness between the fuel injection valve 4 and the injection valve mounting member 8 is further ensured. Even if the seal member 9 loses sealing properties, the combustion gas does not leak to the outside. Further, in the present embodiment, since the seal member 9 is disposed near the tip of the tip nozzle portion 6 of the fuel injection valve 4, the tip nozzle portion 6 of the fuel injection valve 4 has a high temperature inside the combustion chamber 2. The area exposed to the combustion gas of the cylinder head is remarkably reduced, and the cylinder head is formed by the injection valve mounting member 8 and the air layer formed between the injection valve mounting member 8 and the highly heat-insulating resin sealing member 9. 1 to the tip nozzle 6 of the fuel injection valve 4 can be reduced.
The temperature rise of the tip nozzle portion 6 is suppressed, and carbon deposition on the fuel injection hole 6a and a decrease in flow rate due to the carbon adhesion are prevented. In this embodiment, an injection valve mounting member 8 fixed to the main body 5 of the fuel injection valve 4 and screwed to the cylinder head 1 surrounds the front end nozzle 6 of the fuel injection valve 4 with a space. In the meantime, a resin sealing member 9 is fitted. The sealing member 9 is assembled when the fuel injection valve 4 is manufactured, and the fuel injection valve 4 is stored, transported, or cylinder-mounted in the market. At the time of attachment / detachment to / from the head 1, the tip nozzle portion 6 of the fuel injection valve 4 is always protected by the injection valve mounting member 8. Therefore, there is no possibility of directly affecting the vicinity of the fuel injection hole 6a of the tip nozzle portion 6 where extremely high accuracy is required, and therefore, deterioration of fuel injection due to generation of distortion does not occur.
Further, even when the fuel injection valve 4 is attached / detached, the seal member 9 is not attached / detached, so that the airtightness is not deteriorated due to foreign matter biting or damage to the seal surface. Next, FIG. 2 shows a base end portion 8 of the injection valve mounting member 8.
FIG. 9 is a view showing another example of a method of fixing a to the main body 5 of the fuel injection valve 4. In this embodiment, a screw 5a is formed at the lower end of the main body 5 of the fuel injection valve 4, while a female thread 8d is formed at the inner surface of the upper end of the base end 8a of the injection valve mounting member 8. A base end 8a of the member 8 is screwed to the main body 5 of the fuel injection valve. At this time, a seal member 13 is fitted between the end face of the base end 8 a of the injection valve mounting member 8 and the flange 7 of the main body 5 of the fuel injection valve 4. In this embodiment, since the base end 8a of the injector mounting member 8 is screwed to the main body 5 of the fuel injector 4, the injector mounting member 8 and the main body of the injector 4 are screwed. The bond with 5 is strong. Since the seal member 13 is fitted between the base end portion 8a of the injection valve mounting member 8 and the flange 7, the operation of the seal member 9 is supplemented similarly to the first embodiment, and the fuel injection valve 4 and the injection The airtightness with the valve mounting member 8 is also reliably maintained. FIG. 3 shows a base end portion 8 of the injection valve mounting member 8.
FIG. 9 is a view showing still another example of a method of fixing a to the main body 5 of the fuel injection valve 4. In the third embodiment, similarly to the second embodiment, a male screw 5a formed at the lower end of the main body 5 of the fuel injection valve 4 and an upper end of the base end 8a of the injection valve mounting member 8 are formed. The base end 8a of the injection valve mounting member 8 is screwed to the main body 5 of the fuel injection valve 4 by the set screw 8d. However, in this embodiment, a step portion between the large-diameter main body portion 5 of the fuel injection valve 4 and the small-diameter tip nozzle portion 6 and the large-diameter base end portion 8a and the small-diameter tip portion 8b of the injection valve mounting member 8 are formed. The seal member 14 is fitted between the steps. FIG. 4 shows a base end portion 8 of the injection valve mounting member 8.
a of the method of fixing a to the body 5 of the fuel injection valve.
It is a figure showing the example of. This embodiment is different from the third embodiment (FIG. 3) in that the base end portion 8a of the injection valve mounting member 8 is screwed to the main body 5 of the fuel injection valve 4, instead of the injection valve mounting member 8. The upper end of the base end 8a of the flange 7 of the fuel injection valve 4
The injection valve mounting member 8 is fixed to the fuel injection valve 4 by caulking to the upper edge (reference numeral 12). FIG. 5 shows a base end portion 8 of the injection valve mounting member 8.
FIG. 9 is a view showing a fifth example of a method of fixing a to the body 5 of the fuel injection valve 4. In this embodiment, as in the third embodiment (FIG. 3), the base end 8a of the injection valve mounting member 8 is screwed to the main body 5 of the fuel injection valve 4. The position of 15 is not the step portion of the fuel injection valve 4 and the injection valve mounting member 8, but the seal member 9 between the outer periphery of the tip nozzle portion 6 of the fuel injection valve 4 and the tip portion 8 b of the injection valve mounting member 8. Is provided above. By providing the seal members 9 and 15 in this manner, the effect of the seal member 9 is reinforced. In FIG. 5, the base end 8a of the injection valve mounting member 8 is shown.
Is screwed to the main body 5 of the fuel injection valve 4,
As shown in FIG. 1, the base end 8a of the injector mounting member 8 may be welded to the main body 5 of the fuel injector 4 all around.
【図面の簡単な説明】
【図１】図１は本発明による気筒内直接噴射式内燃機関
のシリンダヘッドに装着される燃料噴射弁の取付構造の
一例を示す縦断面図である。
【図２】図２は噴射弁取付部材の基端部を燃料噴射弁の
本体ボディ部に固着する構造の第２の例を示す図であ
る。
【図３】図３は噴射弁取付部材の基端部を燃料噴射弁の
本体ボディ部に固着する構造の第３の例を示す図であ
る。
【図４】図４は噴射弁取付部材の基端部を燃料噴射弁の
本体ボディ部に固着する構造の第４の例を示す図であ
る。
【図５】図５は噴射弁取付部材の基端部を燃料噴射弁の
本体ボディ部に固着する構造の第５の例を示す図であ
る。
【図６】図６は従来の気筒内直接噴射式内燃機関のシリ
ンダヘッドに装着される燃料噴射弁の取付構造の一例を
示す縦断面図である。
【符号の説明】
１…シリンダヘッド、２…燃焼室、３…噴射弁装着孔、
３ａ…大径部、３ｂ…小径部、３ｃ…めねじ、４…燃料
噴射弁、５…本体ボディ部、５ａ…おねじ、６…先端ノ
ズル部、６ａ…燃料噴射孔、６ｂ…円周溝、７…フラン
ジ、８…噴射弁取付部材、８ａ…基端部、８ｂ…先端
部、８ｃ…おねじ、８ｄ…めねじ、９…シール部材、10
…ガスケット、11…溶接部、12…かしめ部、13，14，15
…シール部材。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing one example of a mounting structure of a fuel injection valve mounted on a cylinder head of an in-cylinder direct injection type internal combustion engine according to the present invention. FIG. 2 is a view showing a second example of a structure in which a base end of an injection valve mounting member is fixed to a main body of a fuel injection valve. FIG. 3 is a view showing a third example of a structure in which a base end of an injection valve mounting member is fixed to a main body of a fuel injection valve. FIG. 4 is a view showing a fourth example of a structure in which a base end of an injection valve mounting member is fixed to a main body of a fuel injection valve. FIG. 5 is a view showing a fifth example of a structure in which a base end portion of an injection valve mounting member is fixed to a main body portion of a fuel injection valve. FIG. 6 is a longitudinal sectional view showing an example of a mounting structure of a fuel injection valve mounted on a cylinder head of a conventional direct injection internal combustion engine of a cylinder. [Description of Signs] 1 ... Cylinder head, 2 ... Combustion chamber, 3 ... Injection valve mounting hole,
3a: large diameter portion, 3b: small diameter portion, 3c: female screw, 4: fuel injection valve, 5: main body portion, 5a: male screw, 6: tip nozzle portion, 6a: fuel injection hole, 6b: circumferential groove Reference numeral 7, 7 flange, 8 injection valve mounting member, 8a base end portion, 8b distal end portion, 8c male screw, 8d female screw, 9 seal member, 10
... gasket, 11 ... welded part, 12 ... caulked part, 13, 14, 15
... Seal member.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 広瀬 研二 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 Ｆターム(参考） 3G024 AA04 BA21 GA25 3G066 AA02 AB02 BA56 BA61 CC01 CD04 CE22 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kenji Hirose 1-4-1 Chuo, Wako-shi, Saitama Stock Association Inside the Honda Research Laboratory F term (reference) 3G024 AA04 BA21 GA25 3G066 AA02 AB02 BA56 BA61 CC01 CD04 CE22
Claims (1)
ドに装着される燃料噴射弁の取付構造であって、筒状の
先端部が上記燃料噴射弁の先端ノズル部を間隔をへだて
て囲繞するとともに、基端部が上記燃料噴射弁の本体ボ
ディ部に固着された噴射弁取付部材と、上記燃料噴射弁
の先端ノズル部最先端近傍の外周と上記噴射弁取付部材
の先端部内周との間に嵌装されたシール部材とを備え、
上記シリンダヘッドに設けられた噴射弁装着孔に上記噴
射弁取付部材の先端部が螺着されるようにしたことを特
徴とする燃料噴射弁の取付構造。Claims 1. A mounting structure for a fuel injection valve mounted on a cylinder head of an in-cylinder direct injection type internal combustion engine, wherein a cylindrical tip portion corresponds to a tip nozzle portion of the fuel injection valve. An injection valve mounting member whose base end is fixed to the main body portion of the fuel injection valve, and an outer periphery near the tip end of the front end nozzle portion of the fuel injection valve and the injection valve mounting member are surrounded at a distance. A seal member fitted between the inner periphery of the distal end portion,
A mounting structure for a fuel injection valve, wherein a tip end of the injection valve mounting member is screwed into an injection valve mounting hole provided in the cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001399425A JP3894791B2 (en) | 2001-12-28 | 2001-12-28 | Fuel injection valve mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001399425A JP3894791B2 (en) | 2001-12-28 | 2001-12-28 | Fuel injection valve mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003201936A true JP2003201936A (en) | 2003-07-18 |
| JP3894791B2 JP3894791B2 (en) | 2007-03-22 |
Family
ID=27639718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001399425A Expired - Fee Related JP3894791B2 (en) | 2001-12-28 | 2001-12-28 | Fuel injection valve mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3894791B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100653167B1 (en) | 2005-12-09 | 2006-12-04 | (주)모토닉 | Injector |
| WO2007058103A1 (en) * | 2005-11-16 | 2007-05-24 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve |
| KR100741672B1 (en) | 2006-05-16 | 2007-07-25 | (주)모토닉 | Mounting structure of injector for vehicle |
-
2001
- 2001-12-28 JP JP2001399425A patent/JP3894791B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007058103A1 (en) * | 2005-11-16 | 2007-05-24 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve |
| KR100653167B1 (en) | 2005-12-09 | 2006-12-04 | (주)모토닉 | Injector |
| KR100741672B1 (en) | 2006-05-16 | 2007-07-25 | (주)모토닉 | Mounting structure of injector for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3894791B2 (en) | 2007-03-22 |
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