JP2000120508A - Fuel injector fixing device for engine - Google Patents
Fuel injector fixing device for engineInfo
- Publication number
- JP2000120508A JP2000120508A JP10297757A JP29775798A JP2000120508A JP 2000120508 A JP2000120508 A JP 2000120508A JP 10297757 A JP10297757 A JP 10297757A JP 29775798 A JP29775798 A JP 29775798A JP 2000120508 A JP2000120508 A JP 2000120508A
- Authority
- JP
- Japan
- Prior art keywords
- fuel injector
- fulcrum
- injector
- engine
- bolt
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、デイーゼルエンジ
ン又はガソリンエンジンにおいて、エンジンの固定壁に
燃料噴射器を固定するための燃料噴射器固定装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injector fixing device for fixing a fuel injector to a fixed wall of a diesel engine or a gasoline engine.
【０００２】[0002]
【前提構成】本発明のエンジンの燃料噴射器固定装置
は、例えば本発明に係る図１、又は従来技術に係る図５
及び図６に示すように、次の前提構成を有する。即ち、
噴射器押さえ具１０の基端部に支点部１１を、中間部に
力点部１２を、先端部に左右一対の作用点部１３・１３
を設け、上記支点部１１をエンジンの固定壁１に形成し
た支点受け止め部４で受け止め、固定ボルト７の押圧部
９で上記力点部１２を押圧することにより、上記作用点
部１３・１３で燃料噴射器５の受圧面６・６を押圧して
燃料噴射器５を上記固定壁１に形成した噴射器装着孔２
に固定するように構成されている。[Premise Configuration] The fuel injector fixing device for an engine according to the present invention is, for example, shown in FIG. 1 according to the present invention or FIG.
As shown in FIG. 6 and FIG. That is,
The fulcrum 11 is provided at the base end of the injector retainer 10, the power point 12 is provided at the middle, and a pair of left and right action points 13 is provided at the tip.
The fulcrum portion 11 is received by the fulcrum receiving portion 4 formed on the fixed wall 1 of the engine, and the pressing portion 9 of the fixing bolt 7 presses the force point portion 12, so that the fuel at the action point portions 13. An injector mounting hole 2 formed by pressing the pressure receiving surfaces 6 and 6 of the injector 5 to form the fuel injector 5 on the fixed wall 1.
It is configured to be fixed to.
【０００３】[0003]
【従来の技術】上記前提構成を備える従来の固定装置
は、図５及び図６に示すように、次のように構成されて
いる。即ち、支点受け止め部４は燃料噴射器５の受圧面
６・６とほぼ同じ高さに位置し、力点部１２と固定ボル
ト７との間に球面座金１６が介在し、この力点部１２と
球面座金１６とが球面座１７・１８で接当する。また、
力点部１２は縦向きの筒形に形成され、この力点部１２
から一体に突出している支点部１１及び作用点部１３・
１３は縦向きの板状に形成されている。2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional fixing device having the above-described premise is constituted as follows. That is, the fulcrum receiving portion 4 is located at substantially the same height as the pressure receiving surfaces 6 and 6 of the fuel injector 5, and a spherical washer 16 is interposed between the power point portion 12 and the fixing bolt 7. The washer 16 contacts the spherical seats 17 and 18. Also,
The power point portion 12 is formed in a vertical cylindrical shape.
Fulcrum part 11 and action point part 13
Reference numeral 13 is formed in a vertical plate shape.
【０００４】上記従来技術では、次の問題点がある。 固定ボルト７の軸心Ｓと力点部１２のボルト挿通孔
１９の軸心との間に多少の齟齬があっても、固定ボルト
７に対して噴射器押さえ具１０を自動調心させるため
に、固定ボルト７と噴射器押さえ具１０との間に球面座
金１６が必要である。 また、噴射器押さえ具１０は、その外形を鍛造加工
により叩きだし、力点部１２の球面座１８とボルト挿通
孔１９とを切削加工により形成する必要があるので、そ
の鍛造加工と機械切削加工のために製造コストが高くつ
く。The above prior art has the following problems. Even if there is some inconsistency between the axis S of the fixing bolt 7 and the axis of the bolt insertion hole 19 of the power point portion 12, in order to automatically align the injector presser 10 with respect to the fixing bolt 7, A spherical washer 16 is required between the fixing bolt 7 and the injector retainer 10. In addition, since the outer shape of the injector presser 10 needs to be knocked out by forging, and the spherical seat 18 of the power point portion 12 and the bolt insertion hole 19 must be formed by cutting, the forging and mechanical cutting are performed. Therefore, the production cost is high.
【０００５】そこで上記不都合を解決するために、図２
〜図４に示す燃料噴射器固定装置を提案した（特願平９
−２６１２１４号：以下これを「先提案例」という）。
この先提案例は、図２〜図４に示すように、噴射器押さ
え具１０を金属板のプレスによる打ち抜き加工と曲げ加
工とにより上下逆Ｌ字状に形成し、支点受け止め部４の
高さ位置を燃料噴射器５の受圧面６・６よりも低く位置
させ、この支点受け止め部４で支点部１１を位置決めす
るように構成されている。[0005] In order to solve the above inconvenience, FIG.
4 to FIG. 4 have been proposed.
-261214: This is hereinafter referred to as a “prior proposal example”).
In this prior proposal example, as shown in FIGS. 2 to 4, the injector presser 10 is formed in an upside-down L-shape by punching and bending by pressing a metal plate. Are positioned lower than the pressure receiving surfaces 6.6 of the fuel injector 5, and the fulcrum receiving portion 4 positions the fulcrum portion 11.
【０００６】上記噴射器押さえ具１０には、力点部１２
から作用点部１３にかけて長孔２８があけられ、この長
孔２８に固定ボルト７と燃料噴射器５の上半部が挿通さ
れる。そして長孔２８の左右両側の肉壁部分２９・２９
で、左右一対の力点部１２・１２と作用点部１３・１３
を形成し、左右一対の作用点部１３・１３の先端部同士
を連結部１５で一体に連結してある。また、力点部１２
は側面視で固定ボルト７の押圧部９に向かって凸となる
円弧面に形成され、作用点部１３は側面視で燃料噴射器
５の受圧面６に向かって凸となる円弧面に形成されてい
る。[0006] The injector holder 10 has a power point 12
An elongated hole 28 is formed from to the action point portion 13, and the fixing bolt 7 and the upper half of the fuel injector 5 are inserted into the elongated hole 28. And the wall portions 29, 29 on the left and right sides of the long hole 28
A pair of left and right force points 12 and 12 and action points 13 and 13
Are formed, and the distal end portions of the pair of left and right action points 13 are integrally connected by a connecting portion 15. In addition, the emphasis portion 12
Is formed on an arc surface that protrudes toward the pressing portion 9 of the fixing bolt 7 in a side view, and the action point portion 13 is formed on an arc surface that protrudes toward the pressure receiving surface 6 of the fuel injector 5 in a side view. ing.
【０００７】この先提案例によれば、固定ボルト７を締
め付けて行くと、逆Ｌ字状の押さえ具１０が変形して図
４に示す作用点Ｂが前方（反支点側）へ偏位する。これ
は当該噴射器押さえ具１０が材料力学上の「曲がり梁」
として挙動するためと考えられる。即ち、逆Ｌ字状の噴
射器押さえ具１０の力点Ｃに下向きの押圧力Ｆが作用す
ると、支点Ａには上向きの反力ＦA1 と水平方向の水平
反力ＦA2 が、作用点Ｂには上向きの反力ＦB1 と水平方
向の反力ＦB2 が、それぞれ作用する。According to this prior proposal, when the fixing bolt 7 is tightened, the inverted L-shaped presser 10 is deformed, and the action point B shown in FIG. 4 is shifted forward (opposite the fulcrum side). This is because the injector holder 10 is a “bent beam” in material mechanics.
It is considered to behave as That is, when a downward pressing force F acts on the force point C of the inverse L-shaped injector retainer 10, an upward reaction force F A1 and a horizontal reaction force F A2 on the fulcrum A are applied to the application point B. The upward reaction force F B1 and the horizontal reaction force F B2 act respectively.
【０００８】図４より、支点Ａに関する全回転モーメン
トは釣り合うので、次式を得る。 ＦB1・（ａ＋ｂ）＋ＦB2・ｈ−Ｆ・ａ＝０ ＦB2 ＝〔Ｆ・ａ−ＦB1 ・（ａ＋ｂ）〕／ｈ ただ
し、ＦA2 ＝ＦＢ２ ところが支点Ａは位置決めされているため、水平反力Ｆ
Ｂ２ に対応する分だけ噴射器押さえ具１０の作用点Ｂ
が前方へ偏位する。つまり、作用点Ｂが燃料噴射器５の
軸心から前方へ偏位し、固定ボルト７の締め付け力を管
理するだけでは適正な締結力が得られなくなる。From FIG. 4, since the total rotational moment about the fulcrum A is balanced, the following equation is obtained. F B1 · (a + b) + F B2 · h-F · a = 0 F B2 = [F · a-F B1 · ( a + b) ] / h However, since the F A2 = F B2 However fulcrum A is positioned, Horizontal reaction force F
Action point B of injector presser 10 corresponding to B2
Is displaced forward. That is, the point of action B is displaced forward from the axis of the fuel injector 5, and an appropriate fastening force cannot be obtained only by controlling the fastening force of the fixing bolt 7.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、このような
事情を考慮してなされたもので、（イ）従来技術に必要
な「球面座金」を省略できるようにすること、（ロ）固
定ボルトの締め付け力を管理するだけで、燃料噴射器の
適正な締結力が得られるようにすること、（ハ）噴射器
押さえ具の製造コストを大幅に引き下げること、を技術
課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and (A) is to make it possible to omit the "spherical washer" required for the prior art; It is an object of the present invention to obtain a proper fastening force of a fuel injector only by managing a bolt tightening force, and to (c) significantly reduce the manufacturing cost of an injector presser.
【００１０】[0010]
【課題を解決するための手段】本発明は、例えば図１に
示すように、以下の基本構成を備える。噴射器押さえ具
１０の基端部に支点部１１を、中間部に力点部１２を、
先端部に左右一対の作用点部１３・１３を設け、上記支
点部１１をエンジンの固定壁１に形成した支点受け止め
部４で受け止め、固定ボルト７の押圧部９で上記力点部
１２を押圧することにより、上記作用点部１３・１３で
燃料噴射器５の受圧面６・６を押圧して燃料噴射器５を
上記固定壁１に形成した噴射器装着孔２に固定する。こ
こで、エンジンの固定壁１とは、例えばシリンダブロッ
ク、シリンダヘッド、又は吸気管を意味し、上記固定ボ
ルト７の押圧部９は、当該ボルト７が頭付きボルトの場
合にはボルト頭部を、スタッドボルトの場合にはナット
を、それぞれ意味する。The present invention has the following basic structure, for example, as shown in FIG. A fulcrum 11 at the base end of the injector retainer 10, a power point 12 at the middle,
A pair of left and right action points 13 is provided at the tip, the fulcrum 11 is received by a fulcrum receiving part 4 formed on the fixed wall 1 of the engine, and the pressing part 9 of the fixing bolt 7 presses the force point 12. As a result, the pressure receiving surfaces 6.6 of the fuel injector 5 are pressed by the action points 13, and the fuel injector 5 is fixed to the injector mounting hole 2 formed in the fixed wall 1. Here, the fixed wall 1 of the engine means, for example, a cylinder block, a cylinder head, or an intake pipe. When the bolt 7 is a bolt with a head, the pressing portion 9 of the fixing bolt 7 has a bolt head. In the case of a stud bolt, it means a nut.
【００１１】請求項１に記載の発明は、上記課題（イ）
（ロ）を解決するもので、例えば図１に示すように、以
下の特徴構成を備える。即ち、上記基本構成を備えるエ
ンジンの燃料噴射器固定装置において、噴射器押さえ具
１０を金属板により上下逆Ｌ字状に形成し、支点受け止
め部４の高さ位置を受圧面６・６よりも低く位置させ、
この支点受け止め部４で上記押さえ具１０の支点部１１
を受け止めて位置決めする。この噴射器押さえ具１０
は、力点部１２から作用点部１３にかけて長孔２８をあ
け、この長孔２８に固定ボルト７と燃料噴射器５の上半
部を挿通するとともに、上記固定ボルト７に長孔２８の
ボルト側内端面２８ａを接当させて作用点Ｂが前方へ偏
位するのを規制するように構成する。なお、上記金属板
としては、曲げ強度およびプレス加工性に優れるものが
好ましく、例えば鉄・鋼・および鉄合金を含む鉄系金属
がある。鉄合金としては、ステンレス鋼やニクロム鋼な
どがある。[0011] The first aspect of the present invention provides the above-mentioned object (a).
(B) is solved, for example, as shown in FIG. That is, in the fuel injector fixing device for an engine having the above basic configuration, the injector presser 10 is formed in an upside-down L-shape with a metal plate, and the height position of the fulcrum receiving portion 4 is higher than the pressure receiving surface 6. Position it low,
The fulcrum receiving portion 4 supports the fulcrum portion 11 of the holding tool 10.
And position it. This injector holder 10
A hole 28 is formed from the point of force 12 to the point of action 13, the fixing bolt 7 and the upper half of the fuel injector 5 are inserted into the hole 28, and the fixing bolt 7 is inserted into the bolt side of the hole 28. The inner end surface 28a is abutted to restrict the point of action B from shifting forward. The metal plate preferably has excellent bending strength and press workability, and examples thereof include iron-based metals including iron, steel, and iron alloys. Examples of the iron alloy include stainless steel and nichrome steel.
【００１２】請求項２に記載の発明は、請求項１に記載
したエンジンの燃料噴射器固定装置において、力点部１
２を側面視で固定ボルト７の押圧部９に向かって凸とな
る円弧面に形成し、作用点部１３を側面視で燃料噴射器
５の受圧面６に向かって凸となる円弧面に形成したこと
を特徴とする。According to a second aspect of the present invention, in the fuel injector fixing device for an engine according to the first aspect, the power point portion 1 is provided.
2 is formed in an arc surface that is convex toward the pressing portion 9 of the fixing bolt 7 in a side view, and the action point portion 13 is formed in an arc surface that is convex toward the pressure receiving surface 6 of the fuel injector 5 in a side view. It is characterized by having done.
【００１３】請求項３に記載の発明は、請求項１又は請
求項２に記載したエンジンの燃料噴射器固定装置におい
て、上記噴射器押さえ具１０は、金属板のプレスによる
打ち抜き加工と曲げ加工とにより形成するとともに、支
点部１１の少なくとも周面はさらにプレスによるヘッダ
ー加工により形成したことを特徴とする。According to a third aspect of the present invention, in the fuel injector fixing device for an engine according to the first or second aspect, the injector presser 10 is formed by punching and bending a metal plate by pressing. , And at least the peripheral surface of the fulcrum portion 11 is further formed by header processing by press.
【００１４】[0014]
【発明の作用・効果】本発明によれば、以下の作用・効
果を奏する。 （イ）請求項１に記載の発明によれば、従来技術の「球
面座金」を省略できる。即ち、前記基本構成を備えるエ
ンジンの燃料噴射器固定装置において、噴射器押さえ具
１０を金属板により上下逆Ｌ字状に形成し、支点受け止
め部４の高さ位置を受圧面６・６よりも低く位置させ、
この支点受け止め部４で噴射器押さえ具１０の支点部１
１を位置決めしたことから、固定ボルト７を締め付けて
行くと、逆Ｌ字状の噴射器押さえ具１０が材料力学上の
「曲がり梁」として挙動し、その作用点Ｂが前方（反支
点側）へ偏位しようとする。しかし、この噴射器押さえ
具１０には力点部１２から作用点部１３にかけて長孔２
８があけられ、固定ボルト７にこの長孔２８のボルト側
内端面２８ａを接当させてあるので、作用点Ｂが燃料噴
射器５の軸心から前方へ偏位するのを規制する。つま
り、固定ボルト７を締め付けて行くことで、噴射器押さ
え具１０自体に自動調心と同様の作用が生じる。これに
より従来技術の「球面座金」を省略できる。According to the present invention, the following functions and effects are obtained. (A) According to the first aspect of the invention, the conventional "spherical washer" can be omitted. That is, in the fuel injector fixing device for an engine having the above basic configuration, the injector presser 10 is formed in an upside-down L-shape with a metal plate, and the height position of the fulcrum receiving portion 4 is higher than the pressure receiving surface 6. Position it low,
The fulcrum receiving portion 4 supports the fulcrum portion 1 of the injector presser 10.
When the fixing bolt 7 is tightened since the position 1 has been positioned, the inverted L-shaped injector retainer 10 behaves as a “bent beam” in material mechanics, and its action point B moves forward (opposite the fulcrum side). Try to deviate to However, the injector holder 10 has a long hole 2 from the point of force 12 to the point of action 13.
8, the bolt-side inner end surface 28a of the elongated hole 28 is in contact with the fixing bolt 7, so that the point of action B is prevented from deviating forward from the axis of the fuel injector 5. That is, by tightening the fixing bolt 7, the same effect as the self-alignment is generated in the injector presser 10 itself. As a result, the conventional "spherical washer" can be omitted.
【００１５】（ロ）請求項１に記載の発明によれば、固
定ボルトの締め付け力を管理するだけで、適正な締結力
が得られる。即ち、固定ボルト７を締め付けて行くと、
固定ボルト７に長孔２８のボルト側内端面２８ａが接当
して作用点Ｂが燃料噴射器５の軸心から前方へ偏位する
のを規制し、噴射器押さえ具１０自体に自動調心と同様
の作用が生じるので、固定ボルト７の締め付け力を管理
するだけで適正な締結力が得られることとなる。According to the first aspect of the present invention, an appropriate fastening force can be obtained only by controlling the fastening force of the fixing bolt. That is, when the fixing bolt 7 is tightened,
The bolt-side inner end surface 28a of the elongated hole 28 abuts against the fixing bolt 7 to restrict the point of action B from being displaced forward from the axis of the fuel injector 5 and to automatically align the injector holding member 10 itself. Since the same operation as described above occurs, an appropriate fastening force can be obtained only by controlling the fastening force of the fixing bolt 7.
【００１６】（ハ）請求項２に記載の発明では、請求項
１に記載したエンジンの燃料噴射器固定装置において、
力点部１２を側面視で固定ボルト７の押圧部９に向かっ
て凸となる円弧面に形成し、作用点部１３を側面視で燃
料噴射器５の受圧面６に向かって凸となる円弧面に形成
したことから、力点部１２及び作用点部１３を平坦に形
成したものと比較して、前記自動調心作用が生じ易くな
るので、上記作用・効果（イ）（ロ）を促進する。(C) According to the second aspect of the invention, in the fuel injector fixing device for an engine according to the first aspect,
The power point portion 12 is formed in an arc surface that is convex toward the pressing portion 9 of the fixing bolt 7 in a side view, and the application point portion 13 is an arc surface that is convex toward the pressure receiving surface 6 of the fuel injector 5 in a side view. As described above, the self-centering effect is more likely to occur as compared with the case where the force point portion 12 and the action point portion 13 are formed flat, so that the above-mentioned effects and effects (a) and (b) are promoted.
【００１７】（ニ）請求項３に記載の発明では、請求項
１又は請求項２に記載したエンジンの燃料噴射器固定装
置において、噴射器押さえ具１０を金属板のプレスによ
る打ち抜き加工と曲げ加工とにより形成するとともに、
支点部１１の少なくとも周面をプレスによるヘッダー加
工により形成したことから、上記作用・効果（イ）を奏
する他に、押さえ具の製造コストを大幅に引き下げるこ
とができる。(D) In the invention according to claim 3, in the fuel injector fixing device for an engine according to claim 1 or 2, the injector presser 10 is stamped and bent by pressing a metal plate. And formed by
Since at least the peripheral surface of the fulcrum portion 11 is formed by header processing using a press, in addition to the above-described operation and effect (a), the manufacturing cost of the holding member can be significantly reduced.
【００１８】[0018]
【発明の実施の形態】以下、本発明の実施の形態を、図
１に基き説明する。エンジンのシリンダヘッド１に噴射
器装着孔２・ボルト締結ねじ穴３及び支点受け止め部４
を前後に整列させて形成する。噴射器装着孔２は、噴射
器本体嵌入孔２１の孔底面２２に小径のノズル挿通孔２
３を貫通させたものから成る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Injector mounting hole 2, bolt fastening screw hole 3, and fulcrum receiving portion 4 in cylinder head 1 of the engine
Are aligned back and forth. The injector mounting hole 2 is provided with a small-diameter nozzle insertion hole 2 in the bottom surface 22 of the injector body fitting hole 21.
3 is formed.
【００１９】噴射器装着孔２の噴射器本体嵌入孔２１及
びノズル挿通孔２３内に、燃料噴射器５の噴射器本体２
４の下半部及び噴射ノズル２５を内嵌させ、噴射器本体
２４の下端面２６を銅パッキン２７を挟んで噴射器本体
嵌入孔２１の孔底面２６に受け止めさせる。燃料噴射器
５の上半部に左右一対の受圧面６・６を形成する。ボル
ト締結ねじ穴３に固定ボルト７のねじ脚部８をねじ嵌合
する。この固定ボルト７は座付き六角頭ボルトから成
り、そのボルト頭部９が押圧部になっている。The injector main body 2 of the fuel injector 5 is inserted into the injector main body insertion hole 21 and the nozzle insertion hole 23 of the injector mounting hole 2.
4 and the injection nozzle 25 are fitted inside, and the lower end surface 26 of the injector body 24 is received by the hole bottom surface 26 of the injector body fitting hole 21 with the copper packing 27 interposed therebetween. A pair of left and right pressure receiving surfaces 6.6 are formed in the upper half of the fuel injector 5. The screw foot 8 of the fixing bolt 7 is screwed into the bolt fastening screw hole 3. The fixing bolt 7 is composed of a hexagonal head bolt with a seat, and the bolt head 9 serves as a pressing portion.
【００２０】噴射器押さえ具１０は、その一端部に支点
部１１を、中間部に力点部１２を、他端部に左右一対の
作用点部１３・１３を、それぞれ形成して成る。この噴
射器押さえ具１０の支点部１１を支点受け止め部４に、
作用点部１３・１３を受圧面６・６に、それぞれ接当さ
せた状態で、固定ボルト７のボルト頭部９で力点部１２
を押圧することにより、作用点部１３・１３で燃料噴射
器５の受圧面６・６を押圧して当該燃料噴射器５を噴射
器装着孔２に固定するように構成されている。The injector retainer 10 has a fulcrum 11 at one end, a power point 12 at an intermediate portion, and a pair of left and right action points 13 at the other end. The fulcrum portion 11 of the injector presser 10 is used as the fulcrum receiving portion 4,
With the action point portions 13 contacting the pressure receiving surfaces 6.6, respectively, the power point portions 12 are
, The pressure receiving surfaces 6.6 of the fuel injector 5 are pressed by the action points 13, 13, and the fuel injector 5 is fixed to the injector mounting hole 2.
【００２１】シリンダヘッド１の支点受け止め部４の高
さ位置は、上記受圧面６・６よりも格段に低く位置させ
る。この支点受け止め部４はシリンダヘッド１の上面に
あけた縦穴１４の底面で形成する。この縦穴１４に支点
部１１を挿嵌して、支点部１１を支点受け止め部４で前
後方向に位置決めする。また、力点部１２は側面視で固
定ボルト７の押圧部９に向かって凸となる円弧面に形成
し、作用点部１３は側面視で燃料噴射器５の受圧面６に
向かって凸となる円弧面に形成する。これは力点部１２
及び作用点部１３を平坦に形成したものと比較して、後
述する自動調心作用を生じ易くすることを意図したもの
である。なお、力点部１２の円弧面の曲率半径Ｒの中心
Ｏは、側面視で固定ボルト７の軸心Ｓと支点受け止め部
４の水平面との交点の近傍部に位置させる。The height position of the fulcrum receiving portion 4 of the cylinder head 1 is set significantly lower than the pressure receiving surfaces 6.6. The fulcrum receiving portion 4 is formed at the bottom surface of a vertical hole 14 formed on the upper surface of the cylinder head 1. The fulcrum 11 is inserted into the vertical hole 14, and the fulcrum 11 is positioned by the fulcrum receiving portion 4 in the front-rear direction. In addition, the power point portion 12 is formed on an arc surface that is convex toward the pressing portion 9 of the fixing bolt 7 in a side view, and the action point portion 13 is convex toward the pressure receiving surface 6 of the fuel injector 5 in a side view. Formed on an arc surface. This is the emphasis part 12
In addition, it is intended to make it easier to produce the self-aligning action described later as compared with the case where the action point portion 13 is formed flat. The center O of the radius of curvature R of the arc surface of the power point portion 12 is located near the intersection of the axis S of the fixing bolt 7 and the horizontal plane of the fulcrum receiving portion 4 in a side view.
【００２２】上記噴射器押さえ具１０は、金属板のプレ
スによる打ち抜き加工と曲げ加工とにより上下逆Ｌ字状
に形成する。この金属板としては、曲げ強度およびプレ
ス加工性に優れるものが好ましく、例えば鉄・鋼・およ
び鉄合金を含む鉄系金属がある。鉄合金としては、ステ
ンレス鋼やニクロム鋼などがある。支点部１１の周面
は、プレスによるヘッダー加工により円柱形に形成す
る。支点部１１の底面は、プレスによるヘッダー加工に
より凸の部分球面に形成する。The injector presser 10 is formed in an inverted L-shape by punching and bending a metal plate by pressing. The metal plate preferably has excellent bending strength and press workability, and examples thereof include iron-based metals including iron, steel, and iron alloys. Examples of the iron alloy include stainless steel and nichrome steel. The peripheral surface of the fulcrum portion 11 is formed into a cylindrical shape by header processing using a press. The bottom surface of the fulcrum 11 is formed into a convex partial spherical surface by header processing by pressing.
【００２３】上記噴射器押さえ具１０の前半部分の左右
方向の中央部に、前後方向に長軸の長孔２８をあける。
この長孔２８の左右両側の肉壁部分２９・２９で、左右
一対の力点部１２・１２及び作用点部１３・１３を形成
し、左右一対の作用点部１３・１３の先端部同士を連結
部１５で一体に連結してある。A long hole 28 having a long axis is formed in the front-rear direction at the center in the left-right direction of the front half of the injector presser 10.
The left and right wall portions 29, 29 on the left and right sides of the elongated hole 28 form a pair of left and right force points 12, 12 and action points 13, 13, and connect the tips of the pair of left and right action points 13, 13. The parts 15 are integrally connected.
【００２４】上記長孔２８は、そのボルト側内端面２８
ａを固定ボルト７に接当させた状態では、作用点Ｂが燃
料噴射器５の軸心と合致するように構成されており、固
定ボルト７を締め付けて行くとボルト側内端面２８ａが
固定ボルト７に接当して作用点Ｂが燃料噴射器５の軸心
から前方へ偏位するのを規制する。つまり、固定ボルト
７を締め付けることで、噴射器押さえ具１０自体に自動
調心と同様の作用が生じる。これにより、従来技術の
「球面座金」を省略でき、固定ボルト７の締め付け力を
管理するだけで適正な締結力が得られることとなる。The elongated hole 28 has a bolt-side inner end surface 28.
In the state where a is in contact with the fixing bolt 7, the action point B is configured to coincide with the axis of the fuel injector 5, and when the fixing bolt 7 is tightened, the bolt-side inner end surface 28a becomes 7 and restricts the point of action B from deviating forward from the axis of the fuel injector 5. That is, by tightening the fixing bolt 7, the same effect as the self-alignment is generated in the injector presser 10 itself. Thereby, the conventional "spherical washer" can be omitted, and an appropriate fastening force can be obtained only by controlling the fastening force of the fixing bolt 7.
【図１】本発明に係るエンジンの燃料噴射器固定装置の
実施の形態を示す、要部縦断側面図である。FIG. 1 is a longitudinal sectional side view showing a main part of an embodiment of a fuel injector fixing device for an engine according to the present invention.
【図２】先提案例に係る図１相当図である。FIG. 2 is a diagram corresponding to FIG. 1 according to a prior proposal example.
【図３】先提案例に係る噴射器押さえ具の一部切除斜視
図である。FIG. 3 is a partially cutaway perspective view of an injector presser according to a previously proposed example.
【図４】先提案例に係る噴射器押さえ具の材料力学的作
用説明図である。FIG. 4 is an explanatory diagram of a material mechanical action of an injector presser according to a previously proposed example.
【図５】従来例に係る図１相当図である。FIG. 5 is a diagram corresponding to FIG. 1 according to a conventional example.
【図６】図５の要部取り出し斜視図である。FIG. 6 is a perspective view of a main part taken out of FIG. 5;
１…固定壁（シリンダヘッド）、２…噴射器装着孔、３
…ボルト締結ねじ穴、４…支点受け止め部、５…燃料噴
射器、６…燃料噴射器の受圧面、７…固定ボルト、９…
固定ボルトの押圧部、１０…噴射器押さえ具、１１…押
さえ具の支点部、１２…押さえ具の力点部、１３…押さ
え具の作用点部、Ｂ…作用点、２８…長孔、２８ａ…長
孔のボルト側内端面。1 ... fixed wall (cylinder head) 2 ... injector mounting hole 3
... bolt fastening screw hole, 4 ... fulcrum receiving part, 5 ... fuel injector, 6 ... pressure receiving surface of fuel injector, 7 ... fixing bolt, 9 ...
Pressing portion of fixing bolt, 10: injector holding member, 11: fulcrum portion of holding member, 12: force point portion of holding member, 13: action point portion of holding member, B: action point, 28: elongated hole, 28a ... Bolt side inner end face of long hole.
Claims (3)
部（１１）を、中間部に力点部（１２）を、先端部に左
右一対の作用点部（１３・１３）を設け、上記支点部
（１１）をエンジンの固定壁（１）に形成した支点受け
止め部（４）で受け止め、固定ボルト（７）の押圧部
（９）で上記力点部（１２）を押圧することにより、上
記作用点部（１３・１３）で燃料噴射器（５）の受圧面
（６・６）を押圧して燃料噴射器（５）を上記固定壁
（１）に形成した噴射器装着孔（２）に固定するように
構成した、エンジンの燃料噴射器固定装置において、 上記噴射器押さえ具（１０）は、金属板により上下逆Ｌ
字状に形成し、支点受け止め部（４）の高さ位置を燃料
噴射器（５）の受圧面（６・６）よりも低く位置させ、
この支点受け止め部（４）で支点部（１１）を受け止め
て位置決めし、力点部（１２）から作用点部（１３）に
かけて長孔（２８）をあけ、この長孔（２８）に固定ボ
ルト（７）と燃料噴射器（５）の上半部を挿通するとと
もに、固定ボルト（７）に長孔（２８）のボルト側内端
面（２８ａ）を接当させて作用点（Ｂ）が前方へ偏位す
るのを規制するように構成した、ことを特徴とするエン
ジンの燃料噴射器固定装置。1. A fulcrum (11) is provided at a base end of an injector presser (10), a force application part (12) is provided at an intermediate part, and a pair of right and left action points (13, 13) is provided at a tip. The fulcrum portion (11) is received by a fulcrum receiving portion (4) formed on the fixed wall (1) of the engine, and the pressing portion (12) of the fixing bolt (7) is pressed against the force point portion (12). The pressure receiving surface (6.6) of the fuel injector (5) is pressed by the action point portion (13/13) to form the fuel injector (5) on the fixed wall (1). In the fuel injector fixing device for an engine configured to be fixed to 2), the injector presser (10) is upside down L by a metal plate.
The fulcrum receiving portion (4) is positioned lower than the pressure receiving surface (6.6) of the fuel injector (5),
The fulcrum receiving portion (4) receives and positions the fulcrum portion (11), and drills a long hole (28) from the force point portion (12) to the application point portion (13). 7) and the upper half of the fuel injector (5) and the bolt-side inner end surface (28a) of the elongated hole (28) is brought into contact with the fixing bolt (7) so that the point of action (B) moves forward. A fuel injector fixing device for an engine, wherein the device is configured to restrict deviation.
器固定装置において、上記押さえ具（１０）は、力点部
（１２）を側面視で固定ボルト（７）の押圧部（９）に
向かって凸となる円弧面に形成し、作用点部（１３）を
側面視で燃料噴射器（５）の受圧面（６）に向かって凸
となる円弧面に形成した、ことを特徴とするエンジンの
燃料噴射器固定装置。2. The fuel injector fixing device for an engine according to claim 1, wherein the pressing member (10) faces the pressing part (9) of the fixing bolt (7) in a side view when the force point part (12) is viewed. An engine characterized in that the operating point (13) is formed in an arc surface that is convex toward the pressure receiving surface (6) of the fuel injector (5) in a side view. Fuel injector fixing device.
ンの燃料噴射器固定装置において、上記押さえ具（１
０）は、金属板のプレスによる打ち抜き加工と曲げ加工
とにより形成するとともに、支点部（１１）の少なくと
も周面はさらにプレスによるヘッダー加工により形成し
た、ことを特徴とするエンジンの燃料噴射器固定装置。3. The fuel injector fixing device for an engine according to claim 1, wherein the holding member (1) is provided.
0) The fuel injector fixing of the engine, wherein the metal plate is formed by punching and bending by pressing, and at least the peripheral surface of the fulcrum (11) is further formed by header processing by pressing. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29775798A JP3535981B2 (en) | 1998-10-20 | 1998-10-20 | Engine fuel injector fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29775798A JP3535981B2 (en) | 1998-10-20 | 1998-10-20 | Engine fuel injector fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000120508A true JP2000120508A (en) | 2000-04-25 |
| JP3535981B2 JP3535981B2 (en) | 2004-06-07 |
Family
ID=17850788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29775798A Expired - Fee Related JP3535981B2 (en) | 1998-10-20 | 1998-10-20 | Engine fuel injector fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3535981B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002066821A1 (en) * | 2001-02-21 | 2002-08-29 | Robert Bosch Gmbh | Hold-down metal plate for securing a fuel injection valve |
| WO2006125686A1 (en) * | 2005-05-25 | 2006-11-30 | Robert Bosch Gmbh | Connection system |
| FR2887303A1 (en) * | 2005-06-20 | 2006-12-22 | Renault Sas | Fuel injector mounting flange for use in diesel engine, has central part connecting fingers and including spherical bulge supported on bearing cap casing and bore situated between fingers and spherical bulge |
| EP1746282A1 (en) * | 2005-07-19 | 2007-01-24 | Siemens Aktiengesellschaft | Connector and system |
| EP1746283A1 (en) * | 2005-07-19 | 2007-01-24 | Siemens Aktiengesellschaft | Verbindung und System |
| EP1837517A1 (en) * | 2006-03-23 | 2007-09-26 | Delphi Technologies, Inc. | Injector mounting arrangement |
| WO2008009842A1 (en) * | 2006-07-21 | 2008-01-24 | Peugeot Citroën Automobiles SA | Combustion engine injector holder retaining fork |
| EP1887215A1 (en) * | 2006-08-01 | 2008-02-13 | Siemens Aktiengesellschaft | Clamping device and cylinder head arrangement |
| WO2012054601A3 (en) * | 2010-10-20 | 2012-08-23 | Illinois Tool Works Inc. | Fuel injector bracket assembly |
-
1998
- 1998-10-20 JP JP29775798A patent/JP3535981B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100840521B1 (en) * | 2001-02-21 | 2008-06-24 | 로베르트 보쉬 게엠베하 | Hold-down metal plate for securing a fuel injection valve |
| US6769408B2 (en) | 2001-02-21 | 2004-08-03 | Robert Bosch Gmbh | Hold-down metal plate for securing a fuel injection valve |
| WO2002066821A1 (en) * | 2001-02-21 | 2002-08-29 | Robert Bosch Gmbh | Hold-down metal plate for securing a fuel injection valve |
| WO2006125686A1 (en) * | 2005-05-25 | 2006-11-30 | Robert Bosch Gmbh | Connection system |
| US7461638B2 (en) | 2005-05-25 | 2008-12-09 | Robert Bosch Gmbh | Connector system |
| FR2887303A1 (en) * | 2005-06-20 | 2006-12-22 | Renault Sas | Fuel injector mounting flange for use in diesel engine, has central part connecting fingers and including spherical bulge supported on bearing cap casing and bore situated between fingers and spherical bulge |
| EP1746282A1 (en) * | 2005-07-19 | 2007-01-24 | Siemens Aktiengesellschaft | Connector and system |
| EP1746283A1 (en) * | 2005-07-19 | 2007-01-24 | Siemens Aktiengesellschaft | Verbindung und System |
| EP1837517A1 (en) * | 2006-03-23 | 2007-09-26 | Delphi Technologies, Inc. | Injector mounting arrangement |
| US7735474B2 (en) | 2006-03-23 | 2010-06-15 | Delphi Technologies, Inc. | Injector mounting arrangement |
| FR2904059A1 (en) * | 2006-07-21 | 2008-01-25 | Peugeot Citroen Automobiles Sa | HOLDING FORK OF A THERMAL MOTOR INJECTOR HOLDER. |
| WO2008009842A1 (en) * | 2006-07-21 | 2008-01-24 | Peugeot Citroën Automobiles SA | Combustion engine injector holder retaining fork |
| EP1887215A1 (en) * | 2006-08-01 | 2008-02-13 | Siemens Aktiengesellschaft | Clamping device and cylinder head arrangement |
| WO2012054601A3 (en) * | 2010-10-20 | 2012-08-23 | Illinois Tool Works Inc. | Fuel injector bracket assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3535981B2 (en) | 2004-06-07 |
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