JPS6311324Y2 - - Google Patents
Info
- Publication number
- JPS6311324Y2 JPS6311324Y2 JP20247782U JP20247782U JPS6311324Y2 JP S6311324 Y2 JPS6311324 Y2 JP S6311324Y2 JP 20247782 U JP20247782 U JP 20247782U JP 20247782 U JP20247782 U JP 20247782U JP S6311324 Y2 JPS6311324 Y2 JP S6311324Y2
- Authority
- JP
- Japan
- Prior art keywords
- joint
- injection valve
- hole
- valve
- cylinder head
- 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.)
- Expired
Links
- 238000002347 injection Methods 0.000 claims description 43
- 239000007924 injection Substances 0.000 claims description 43
- 238000003780 insertion Methods 0.000 claims description 34
- 230000037431 insertion Effects 0.000 claims description 34
- 239000000446 fuel Substances 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 19
- 239000003921 oil Substances 0.000 description 31
- 238000001816 cooling Methods 0.000 description 19
- 238000001514 detection method Methods 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 7
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 7
- 239000000295 fuel oil Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
本考案は燃料噴射弁のノズル冷却液継手接続構
造に関する。[Detailed Description of the Invention] The present invention relates to a nozzle coolant joint connection structure for a fuel injection valve.
従来の燃料噴射弁は、ノズル冷却液継手を噴射
弁の上端弁腕室内部分に接続しているが、配管事
故、例えば冷却液管の折損や締付金具等の緩みが
生じた場合には、漏れた冷却液が弁腕室内の潤滑
油を希釈し、機関焼付きや、ライナーとピストン
のスカツフイング事故の原因になる。上記潤滑油
希釈の対策として、例えば大形機関では大量のシ
ステム潤滑油保護のため、弁腕別注油システムを
採用している。ところが弁腕別注油システムを実
施するためには、特別に弁腕注油タンク、弁腕注
油ポンプ及び弁腕注油用配管を必要とし、機関と
して極めて高価になる。 In conventional fuel injection valves, the nozzle coolant joint is connected to the upper valve arm chamber of the injection valve, but in the event of a piping accident, such as a breakage of the coolant pipe or loosening of the fastening fittings, The leaking coolant dilutes the lubricating oil in the valve arm chamber, causing engine seizure and liner and piston scuffing accidents. As a measure against dilution of the lubricating oil, for example, in large engines, separate valve arm lubrication systems are used to protect large amounts of system lubricating oil. However, in order to implement a separate valve arm lubrication system, a special valve arm lubrication tank, valve arm lubrication pump, and valve arm lubrication piping are required, which makes the engine extremely expensive.
また最近では上記潤滑油希釈防止のため、第８
図に示されているように冷却液出口孔６０及び入
口孔６１をシリンダヘツド１内に形成したものが
開発されている。ところが出口孔６０及び入口孔
６１自体が直接に冷却液通路として利用されるよ
うになつているので、例えば冷却液として水を使
用する場合には、たとえ防錆剤を含んでいても、
噴射弁６やシリンダヘツド１の孔６０，６１部分
が腐蝕するおそれがある。 Recently, in order to prevent dilution of the lubricating oil,
As shown in the figure, a cooling liquid outlet hole 60 and an inlet hole 61 formed in the cylinder head 1 have been developed. However, since the outlet hole 60 and the inlet hole 61 themselves are used directly as coolant passages, for example, when water is used as the coolant, even if it contains a rust preventive,
There is a risk that the injection valve 6 and the holes 60 and 61 of the cylinder head 1 will corrode.
本考案は上記各種従来例の欠点に鑑みてなされ
たものであり、コストを高くすることなく潤滑油
希釈を確実に防止でき、ノズル冷却液として水を
使用した場合における噴射弁及びシリンダヘツド
の腐蝕を防止でき、しかも噴射弁を太くしたりす
ることなく冷却液継手を接続できるようにするこ
とを目的としている。その要旨は、シリンダヘツ
ドの噴射弁挿入孔に燃料噴射弁を挿入し、シリン
ダヘツド側面からノズル冷却液継手を噴射弁と概
ね直角方向にシリンダヘツド内に挿入し、噴射弁
の筒状胴部に、噴射弁中心線に対して概ね直角で
しかも弁中心から一定距離偏心する継手挿入孔を
形成し、上記継手挿入孔にＯリングを介して上記
継手を液密状態に差し込むことにより、上記継手
が弁中心から一定距離偏心するように一定の圧力
で継手挿入孔に嵌合接続していることである。以
下実施例図面に基づいて本考案を説明する。 The present invention has been developed in view of the drawbacks of the various conventional examples described above, and it can reliably prevent dilution of lubricating oil without increasing costs, and prevent corrosion of the injection valve and cylinder head when water is used as the nozzle cooling fluid. The purpose of this invention is to prevent this and also to allow a coolant joint to be connected without making the injection valve thicker. The gist is to insert the fuel injection valve into the injection valve insertion hole of the cylinder head, insert the nozzle coolant joint from the side of the cylinder head into the cylinder head in a direction approximately perpendicular to the injection valve, and insert it into the cylindrical body of the injection valve. , by forming a joint insertion hole that is approximately perpendicular to the center line of the injection valve and eccentric by a certain distance from the valve center, and inserting the joint into the joint insertion hole through an O-ring in a liquid-tight state, the joint can be The fitting is connected to the joint insertion hole with a constant pressure so as to be eccentric by a certain distance from the center of the valve. The present invention will be explained below based on the drawings.
第１図において、１はシリンダヘツド、２は燃
料噴射弁挿入孔であつて、挿入孔２の上端は弁腕
室３に開口し、下端は燃料室５に開口している。
燃料噴射弁６は燃料噴射ノズル７とノズルホルダ
ー８等とからなつており、挿入孔２に弁腕室３側
から挿入され、挿入孔２の内周面に第１、第２、
第３「Ｏ」リング９，１０，１１を介して嵌合し
ている。ノズル７はノズル取付ナツト１２により
スペーサ１３を介してホルダー８の下端に連結さ
れている。噴射弁６内にはノズルスプリング１
４、スプリングシート１５、スプリング押え１
６、噴射圧調節用ロツド１７等が挿入されてお
り、ロツド挿通孔１８の上端部分にはロツド１７
の上端噴射圧調節ねじ部１９が螺挿されている。
２０は止めナツト、２１はキヤツプである。 In FIG. 1, 1 is a cylinder head, 2 is a fuel injection valve insertion hole, and the upper end of the insertion hole 2 opens into a valve arm chamber 3, and the lower end opens into a fuel chamber 5.
The fuel injection valve 6 consists of a fuel injection nozzle 7, a nozzle holder 8, etc., and is inserted into the insertion hole 2 from the valve arm chamber 3 side.
They are fitted through third "O" rings 9, 10, 11. The nozzle 7 is connected to the lower end of the holder 8 by a nozzle mounting nut 12 via a spacer 13. There is a nozzle spring 1 inside the injection valve 6.
4, Spring seat 15, Spring presser 1
6. A rod 17 for adjusting the injection pressure is inserted, and the rod 17 is inserted into the upper end of the rod insertion hole 18.
An upper end injection pressure adjusting screw portion 19 is screwed into the upper end injection pressure adjusting screw portion 19 .
20 is a locking nut, and 21 is a cap.
ノズルホルダー８の弁腕室３内部分（フランジ
８ａ部分）には横向きのめねじ孔２２が形成され
ており、めねじ孔２２には噴射管継手２４が螺着
され、継手２４には燃料噴射管が接続される。継
手２４のめねじ孔２２内の先端面は液密状態でめ
ねじ孔２２の奥端面に圧接している。継手２４内
の燃料通路２７はホルダー８（第２図）内の水平
な燃料通路２８と、ホルダー軸心と平行な燃料通
路２９を介してノズル７（第１図）の燃料通路３
０に連通している。 A sideways female threaded hole 22 is formed in the internal portion of the valve arm chamber 3 (flange 8a portion) of the nozzle holder 8, and an injection pipe joint 24 is screwed into the female threaded hole 22. The tubes are connected. The distal end surface of the female threaded hole 22 of the joint 24 is in pressure contact with the inner end surface of the female threaded hole 22 in a liquid-tight state. The fuel passage 27 in the joint 24 connects to the fuel passage 3 of the nozzle 7 (Fig. 1) via a horizontal fuel passage 28 in the holder 8 (Fig. 2) and a fuel passage 29 parallel to the holder axis.
Connected to 0.
シリンダヘツド１内には上側から順に燃料戻り
孔３１、ノズル冷却油（又はノズル冷却水）出口
孔３２及びノズル冷却油（又はノズル冷却水）入
口孔３３が形成されており、各孔３１，３２，３
３はシリンダヘツド１の側面から概ね水平にシリ
ンダヘツド１内を通過して噴射弁挿入孔２に開口
している。各孔３１，３２，３３は、それらの中
心線O1，O2，O3が第１図に示すように噴射弁６
の中心線Ｏに対して概ね直角でかつ第４〜第６図
に示すように噴射弁６の中心Ｏから一定距離Ｌを
隔てるように形成されている。 Inside the cylinder head 1, a fuel return hole 31, a nozzle cooling oil (or nozzle cooling water) outlet hole 32, and a nozzle cooling oil (or nozzle cooling water) inlet hole 33 are formed in order from the top. ,3
3 passes through the cylinder head 1 generally horizontally from the side surface of the cylinder head 1 and opens into the injection valve insertion hole 2. Each hole 31, 32, 33 has its center line O 1 , O 2 , O 3 aligned with the injection valve 6 as shown in FIG.
The injection valve 6 is formed approximately at right angles to the center line O of the injection valve 6, and is spaced a certain distance L from the center O of the injection valve 6, as shown in FIGS.
冷却油入口継手３６は第６図に示すように入口
孔３３内に、入口孔中心O3と同一中心でシリン
ダヘツド１の側面（図示せず）から挿入されてお
り、一方ホルダー８の円筒状胴部８ｂには入口孔
中心O3と同一中心の入口継手挿入孔３８が形成
されており、冷却油入口継手３６はＯリング５８
を介して継手挿入孔３８に液密状態で差し込まれ
ている。即ち冷却油入口継手３６は噴射弁６（第
１図）と概ね直角方向に配置されると共に、上方
から見て（第６図）、継手３６の中心O3が弁中心
Ｏに向わずに弁中心Ｏから一定距離Ｌを隔てるよ
うに配置され、挿入孔３８に嵌合接続されてい
る。 As shown in FIG. 6, the cooling oil inlet joint 36 is inserted into the inlet hole 33 from the side surface (not shown) of the cylinder head 1 at the same center as the inlet hole center O 3 . An inlet joint insertion hole 38 coaxial with the inlet hole center O 3 is formed in the body 8b, and the cooling oil inlet joint 36 is connected to an O ring 58.
It is inserted into the joint insertion hole 38 in a liquid-tight manner through. That is, the cooling oil inlet joint 36 is arranged approximately at right angles to the injection valve 6 (Fig. 1), and the center O3 of the joint 36 does not face the valve center O when viewed from above (Fig. 6). It is arranged so as to be spaced a certain distance L from the valve center O, and is fitted and connected to the insertion hole 38.
入口継手挿入孔３８（第６図）は、胴部８ｂ内
の水平な第１冷却油入口通路３９と、下方へ延び
る第２冷却油入口通路４０を介してノズル冷却通
路４１（第１図）に連通し、さらにノズル先端部
の環状冷却通路４２に連通している。 The inlet joint insertion hole 38 (Fig. 6) connects to the nozzle cooling passage 41 (Fig. 1) via a horizontal first cooling oil inlet passage 39 in the body 8b and a second cooling oil inlet passage 40 extending downward. It communicates with the annular cooling passage 42 at the tip of the nozzle.
冷却油出口継手３５（第５図）は、出口孔３２
と同一中心でシリンダヘツド１の側面から出口孔
３２に挿入されており、一方ホルダー胴部８ｂに
は出口孔中心O2と同一中心の継手挿入孔３７が
形成されており、冷却油出口継手３５はＯリング
５９を介して継手挿入孔３７に液密状態で差し込
まれている。即ち前述の入口継手３６と同様に、
出口継手３５は噴射弁６（第１図）と概ね直角方
向に配置されると共に、上方から見て（第５図）、
継手３５の中心O2が弁中心Ｏに向わずに弁中心
Ｏから一定距離Ｌを隔てるように配置され、挿入
孔３７に嵌合接続されている。 The cooling oil outlet joint 35 (FIG. 5) is connected to the outlet hole 32.
The cooling oil outlet joint 35 is inserted into the outlet hole 32 from the side surface of the cylinder head 1 at the same center as the outlet hole center O2 . is inserted into the joint insertion hole 37 via an O-ring 59 in a liquid-tight manner. That is, similar to the above-mentioned inlet joint 36,
The outlet joint 35 is arranged generally perpendicular to the injection valve 6 (FIG. 1), and when viewed from above (FIG. 5),
The center O 2 of the joint 35 is arranged so as not to face the valve center O, but is spaced a certain distance L from the valve center O, and is fitted and connected to the insertion hole 37 .
出口継手挿入孔３７は、胴部８ｂ内の水平な第
１冷却液出口通路４３と、下方に延びかつ前記第
２冷却油入口通路４０（第６図）と180゜の位相差
を有する第２冷却油出口通路４４等を介して前記
環状冷却通路４２（第１図）に連通している。 The outlet joint insertion hole 37 has a horizontal first coolant outlet passage 43 in the body portion 8b and a second coolant outlet passage 43 extending downward and having a phase difference of 180° with respect to the second coolant inlet passage 40 (FIG. 6). It communicates with the annular cooling passage 42 (FIG. 1) via a cooling oil outlet passage 44 and the like.
第５、第６図の４４ａ，３９ａは止めねじであ
る。 44a and 39a in FIGS. 5 and 6 are set screws.
なお継手３５，３６はシリンダヘツド１の側面
において、適宜に押付具により噴射弁６側へ押し
付けられている。 The joints 35 and 36 are pressed toward the injection valve 6 by appropriate pressing tools on the side surfaces of the cylinder head 1.
漏油排出孔４６（第１図）は冷却油入口孔３３
より下側のシリンダヘツド１部分に形成されてお
り、シリンダヘツド１の側面からシリンダヘツド
１内を略水平に通過して、噴射弁挿入孔２に開口
している。 The oil leakage hole 46 (Fig. 1) is the cooling oil inlet hole 33.
It is formed in the lower part of the cylinder head 1, passes approximately horizontally through the cylinder head 1 from the side surface of the cylinder head 1, and opens into the injection valve insertion hole 2.
漏油排出孔４６が開口している挿入孔２部分の
下側には環状の漏油仕切り４８が嵌着されてお
り、漏油仕切り４８は漏油排出孔４６の上端より
も上方へ延びると共に、挿入孔２の内周面との間
で環状の漏油ガイド路５０を形成している。 An annular oil leak partition 48 is fitted to the lower side of the insertion hole 2 portion where the oil leak drain hole 46 is open, and the oil leak partition 48 extends upward from the upper end of the oil leak drain hole 46. , and the inner circumferential surface of the insertion hole 2 to form an annular oil leakage guide path 50.
また第１図の燃料噴射弁６には継手２４とめね
じ孔２２とのシール部分２６からの燃料の漏れを
検出するために、第２図に示すように継手２４の
先端外周空間部分に漏油検出孔５１を連通してい
る。漏油検出孔５１はホルダー８内を下方へ延
び、第７図の第２漏油検出枝孔５３及びホルダー
８の外周環状隙間５３ａ（第５、第６図）を介し
て環状の漏油ガイド路５０に連通している。即ち
高圧燃料油が継手２４とめねじ孔２２とのシール
部分２６から漏れ始めると、漏油検出孔５１を通
つて漏油排出孔４６から外部に至るので、作業者
は高圧燃料油漏れを検知（目視）することができ
る。 In addition, in order to detect fuel leakage from the seal portion 26 between the joint 24 and the female threaded hole 22 in the fuel injection valve 6 shown in FIG. 1, as shown in FIG. The detection hole 51 is communicated with the detection hole 51 . The oil leakage detection hole 51 extends downward inside the holder 8 and connects to the annular oil leakage guide via the second oil leakage detection branch hole 53 in FIG. 7 and the outer annular gap 53a of the holder 8 (FIGS. 5 and 6). It is connected to Road 50. That is, when high-pressure fuel oil begins to leak from the seal portion 26 between the joint 24 and the female threaded hole 22, it passes through the oil leak detection hole 51 and reaches the outside from the oil leak discharge hole 46, so that the operator can detect the high-pressure fuel oil leak ( visual inspection).
また漏油検出孔５１は、燃料戻り孔３１（第１
図）より上側の第１、第２「Ｏ」リング９，１０
間の嵌合部分にも、第３図に示すように水平な第
１漏油検出枝孔５２を介して連通している。なお
前記第２漏油検出枝孔５３は、第３「Ｏ」リング
１１より下側で冷却油出口孔３２より上側の嵌合
部分に備えられている。 Further, the oil leakage detection hole 51 is connected to the fuel return hole 31 (first
Figure) The first and second "O" rings 9, 10 on the upper side
As shown in FIG. 3, the fitting portion between the two is also communicated through a horizontal first oil leakage detection branch hole 52. The second oil leakage detection branch hole 53 is provided at a fitting portion below the third "O" ring 11 and above the cooling oil outlet hole 32.
即ち上記漏油検出孔５１等を備えると、継手２
４等からの燃料油の漏れによる弁腕室３内の潤滑
油希釈を確実に防止することができ、また「Ｏ」
リング９，１０，１１等の破損による戻り燃料油
の漏れも速やかに検知することができる。 That is, if the oil leakage detection hole 51 and the like are provided, the joint 2
It is possible to reliably prevent dilution of the lubricating oil in the valve arm chamber 3 due to leakage of fuel oil from the "O"
Leakage of return fuel oil due to damage to rings 9, 10, 11, etc. can also be quickly detected.
なお第１図において、５５は冷却水ジエツト
孔、５６は冷却水ジヤケツト、５７はノズルパツ
キンである。 In FIG. 1, 55 is a cooling water jet hole, 56 is a cooling water jacket, and 57 is a nozzle packing.
以上説明したように本考案は、シリンダヘツド
１の噴射弁挿入孔２に燃料噴射弁６を挿入し、シ
リンダヘツド側面からノズル冷却液継手、例えば
冷却油（又は冷却水）出口継手３５と冷却油（又
は冷却水）入口継手６を噴射弁６と概ね直角方向
にシリンダヘツド１内に挿入し、上記継手３５，
３６を弁中心Ｏに向わせずに弁中心Ｏから一定距
離Ｌ偏心させて、噴射弁挿入孔内円筒状胴部８ｂ
に液密状態に差し込んでいるので、次のような利
点がある。 As explained above, in the present invention, the fuel injection valve 6 is inserted into the injection valve insertion hole 2 of the cylinder head 1, and the nozzle coolant joint, such as the cooling oil (or cooling water) outlet joint 35, is connected from the side of the cylinder head. (or cooling water) Insert the inlet joint 6 into the cylinder head 1 in a direction approximately perpendicular to the injection valve 6, and connect the joint 35,
36 is not directed toward the valve center O, but is eccentrically set a certain distance L from the valve center O, and the cylindrical body portion 8b is inserted into the injection valve insertion hole.
Since it is inserted in a liquid-tight state, it has the following advantages.
(1) 継手３５，３６の折損事故やＯリング５８，
５９の破損事故が発生しても、ノズル冷却油
（又は冷却水）が弁腕室３内へ混入することが
ないので弁腕室３内における潤滑油希釈を確実
に防止することができる。従つて潤滑油希釈に
より発生する機関焼付き、ライナーとピストン
のスカツフイング等の事故を未然に防ぐことが
できる。(1) Breakage of joints 35 and 36, O-ring 58,
Even if a breakage accident occurs, the nozzle cooling oil (or cooling water) will not enter the valve arm chamber 3, so dilution of the lubricating oil in the valve arm chamber 3 can be reliably prevented. Therefore, accidents such as engine seizure and liner and piston scuffing caused by lubricating oil dilution can be prevented.
(2) 潤滑油希釈を確実に防止できることにより、
大形機関においても弁腕別注油システムを採用
する必要がなくなり、中小機関並みに１系統の
潤滑油注油システムに統一することができ、機
関の価格が安くなる。(2) By reliably preventing lubricant dilution,
Even in large engines, there is no need to adopt a separate valve arm lubrication system, and the lubricant lubrication system can be unified to a single system similar to that used in small and medium-sized engines, reducing the price of the engine.
(3) シリンダヘツド１内に挿入した継手３５，３
６内を冷却液が通過するようにし、また継手３
５，３６を胴部８ｂに差し込んでいるので、た
とえ冷却液として水を使用しても、シリンダヘ
ツド１の入口孔３３や出口孔３２の内周面及び
胴部８ｂの外周面に水が接触することはなく、
従つてシリンダヘツド１や噴射弁６の腐蝕を未
然に防止することができる。(3) Joints 35 and 3 inserted into cylinder head 1
6 so that the cooling liquid passes through the joint 3.
5 and 36 are inserted into the body 8b, even if water is used as the coolant, water will not come into contact with the inner circumferential surfaces of the inlet hole 33 and outlet hole 32 of the cylinder head 1 and the outer circumferential surface of the body 8b. There's nothing to do,
Therefore, corrosion of the cylinder head 1 and the injection valve 6 can be prevented.
(4) 継手３５，３６を弁中心Ｏから一定距離Ｌ偏
心させて胴部８ｂに差し込んでいるので、胴部
８ｂに特別の接続用枝管部等を一体に形成した
りあるいは胴部８ｂの直径を太くしたりする必
要がない。即ち胴部８ｂを小さく形成しながら
も、継手３５，３６の胴部８ｂ内の差込長さを
充分に採ることができ、確実に接続することが
できる。(4) Since the joints 35 and 36 are inserted into the body 8b at a certain distance L eccentric from the valve center O, special connecting branch pipes etc. may be integrally formed on the body 8b or the body 8b may be There is no need to increase the diameter. That is, even though the body portion 8b is formed small, a sufficient length of insertion of the joints 35 and 36 into the body portion 8b can be ensured, and a reliable connection can be achieved.
弁中心線に対して一定の距離を隔てて偏心する
継手挿入孔３７，３８に対し、ノズル冷却液継手
３５，３６はそれぞれＯリング５９，５８を介し
て液密状態に差し込まれており、ねじ込み式では
ない。従つて継手挿入孔３７，３８や継手３５，
３６にねじ加工する必要はなく、加工及び構造が
簡単である。 The nozzle coolant joints 35 and 36 are inserted into the joint insertion holes 37 and 38, which are eccentric at a certain distance from the valve center line, through O-rings 59 and 58, respectively, and are screwed into the joint insertion holes 37 and 38, which are eccentric to the valve center line. It's not a ceremony. Therefore, the joint insertion holes 37, 38 and the joint 35,
36 is not required to be threaded, and the processing and structure are simple.
即ち継手３５，３６を偏心させることにより、
差込み長さを充分に確保し、しかも本考案の継手
３５，３６は、一般に燃料高圧管の燃料油よりも
低い圧力の冷却液が流れる冷却液継手として利用
しているので、上記のような差し込み式の簡単な
接続構造にすることができると共に、差込み長さ
を充分に確保することにより確実に接続状態を維
持できるのである。 That is, by making the joints 35 and 36 eccentric,
Sufficient insertion length is ensured, and since the joints 35 and 36 of the present invention are generally used as coolant joints through which coolant with a pressure lower than that of the fuel oil in the high-pressure fuel pipe flows, the above-mentioned insertion length is sufficient. Not only can the connection structure be made simple as shown in the formula, but also the connection state can be maintained reliably by ensuring a sufficient insertion length.
なお図示の継手３５，３６はＯリング５８，５
９を介して単に一定の圧力で差し込んでいるだけ
であるが、継手３５，３６の外周面に先細テーパ
部を形成し、継手挿入孔３７，３８の内周面にも
テーパ部を形成し、継手３５，３６を挿入孔３
７，３８にＯリングを介してテーパ嵌合するよう
にしてもよい。 The illustrated joints 35 and 36 are O-rings 58 and 5.
9, the outer peripheral surfaces of the joints 35 and 36 are formed with tapered portions, and the inner peripheral surfaces of the joint insertion holes 37 and 38 are also formed with tapered portions, Insert joints 35 and 36 into hole 3
7 and 38 through an O-ring.
第１図は本考案を適用した燃料噴射弁の縦断面
図、第２〜第５図はそれぞれ第１図の−、
−、−、−断面図、第６図は第１図の
−断面拡大図、第７図は第４図の−断面
図、第８図は従来例の縦断面図である。１……シ
リンダヘツド、２……噴射弁挿入孔、６……燃料
噴射弁、８ｂ……円筒状胴部、３５，３６……ノ
ズル冷却油出口継手、ノズル冷却油入口継手（ノ
ズル冷却液継手の一例）。
FIG. 1 is a longitudinal sectional view of a fuel injection valve to which the present invention is applied, and FIGS. 2 to 5 are -, respectively, in FIG. 1.
6 is an enlarged sectional view of FIG. 1, FIG. 7 is a sectional view of FIG. 4, and FIG. 8 is a vertical sectional view of the conventional example. 1...Cylinder head, 2...Injection valve insertion hole, 6...Fuel injection valve, 8b...Cylindrical body, 35, 36...Nozzle cooling oil outlet joint, nozzle cooling oil inlet joint (nozzle cooling liquid joint) example).
Claims (1)
挿入し、シリンダヘツド側面からノズル冷却液継
手を噴射弁と概ね直角方向にシリンダヘツド内に
挿入し、噴射弁の筒状胴部に、噴射弁中心線に対
して概ね直角でしかも弁中心から一定距離偏心す
る継手挿入孔を形成し、上記継手挿入孔にＯリン
グを介して上記継手を液密状態に差し込むことに
より、上記継手が弁中心から一定距離偏心するよ
うに一定の圧力で継手挿入孔に嵌合接続している
ことを特徴とする燃料噴射弁のノズル冷却液継手
接続構造。 Insert the fuel injection valve into the injection valve insertion hole of the cylinder head, insert the nozzle coolant joint from the side of the cylinder head into the cylinder head in a direction approximately perpendicular to the injection valve, and insert the nozzle coolant joint into the cylindrical body of the injection valve at the center of the injection valve. By forming a joint insertion hole that is approximately perpendicular to the line and offset a certain distance from the valve center, and inserting the joint into the joint insertion hole in a fluid-tight manner via an O-ring, the joint can be placed at a constant distance from the valve center. A nozzle coolant joint connection structure for a fuel injection valve, characterized in that the joint is fitted and connected to a joint insertion hole at a constant pressure so as to be eccentric by a distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20247782U JPS59105061U (en) | 1982-12-29 | 1982-12-29 | Fuel injection valve nozzle coolant joint connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20247782U JPS59105061U (en) | 1982-12-29 | 1982-12-29 | Fuel injection valve nozzle coolant joint connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59105061U JPS59105061U (en) | 1984-07-14 |
| JPS6311324Y2 true JPS6311324Y2 (en) | 1988-04-02 |
Family
ID=30427948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20247782U Granted JPS59105061U (en) | 1982-12-29 | 1982-12-29 | Fuel injection valve nozzle coolant joint connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59105061U (en) |
-
1982
- 1982-12-29 JP JP20247782U patent/JPS59105061U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59105061U (en) | 1984-07-14 |
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