JPH07167008A - Connection structure between flow pipe and fuel distribution pipe in fuel distribution line for internal combustion engine - Google Patents
Connection structure between flow pipe and fuel distribution pipe in fuel distribution line for internal combustion engineInfo
- Publication number
- JPH07167008A JPH07167008A JP5344295A JP34429593A JPH07167008A JP H07167008 A JPH07167008 A JP H07167008A JP 5344295 A JP5344295 A JP 5344295A JP 34429593 A JP34429593 A JP 34429593A JP H07167008 A JPH07167008 A JP H07167008A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- pipe
- flow pipe
- control valve
- pressure control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関に燃料を供給
するための燃料分配路における流通管と燃料分配管との
接続に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection between a distribution pipe and a fuel distribution pipe in a fuel distribution passage for supplying fuel to an internal combustion engine.
【０００２】[0002]
【従来の技術】従来、内燃機関の燃料噴射装置において
は、図５に示すように、図示しない燃料ポンプから圧送
された燃料を各燃料噴射弁２４へ分配するための燃料分
配管１と、前記燃料ポンプから圧送される燃料の圧力を
所定圧力に制御する圧力制御弁８と、圧力制御弁８から
燃料タンクへ戻される余分な燃料が流通する流通管２と
からなる燃料流通路Ａが使用されている。そして、燃料
分配管１内に設置された流通管２の両端は、圧力制御弁
８と燃料分配管１に夫々Ｏリング取り付け溝に嵌合した
Ｏリング２２、２３により液密的に固定していた。2. Description of the Related Art Conventionally, in a fuel injection device for an internal combustion engine, as shown in FIG. 5, a fuel distribution pipe 1 for distributing fuel pressure-fed from a fuel pump (not shown) to each fuel injection valve 24, and A fuel flow passage A including a pressure control valve 8 for controlling the pressure of the fuel pumped from the fuel pump to a predetermined pressure and a flow pipe 2 through which the excess fuel returned from the pressure control valve 8 to the fuel tank flows is used. ing. Both ends of the flow pipe 2 installed in the fuel distribution pipe 1 are liquid-tightly fixed to the pressure control valve 8 and the fuel distribution pipe 1 by O-rings 22 and 23 fitted in O-ring mounting grooves, respectively. It was
【０００３】[0003]
【発明が解決しようとする課題】上記従来のものにおい
ては、Ｏリング取り付け溝の加工に工数がかかる。ま
た、組み付けに際しては、カバー４を具備した流通管２
を圧力制御弁８と反対側における燃料分配管１開口端か
ら挿入して、その流通管２の先端部を圧力制御弁８のＯ
リング２２へ嵌合すると共に、カバー４に備えたＯリン
グ２５を燃料分配管１の端部に嵌合して組み付けるが、
カバー４の挿入部が短く、かつ隙間ばめなので真直度が
出にくい、また流通管２に備えたＯリング２３をカバー
４に嵌合して組み付けるが、流通管２の挿入部も短く、
かつ隙間ばめなので真直度がでにくく、流通管２がうま
く取り付かない。また、長い流通管２の両端を弾性体の
Ｏリング２２、２３で固定するため、流通管２が振動し
やすく、騒音も発生しやすいという問題がある。本発明
は、Ｏリング取り付け用溝に嵌合したＯリングにより流
通管２の両端部を支持することを廃止し、流通管の組み
付け性の向上と、流通管の振動、騒音の発生を防止する
ことを目的とするものである。In the above-mentioned conventional one, it takes a lot of man-hours to process the O-ring mounting groove. In addition, at the time of assembly, the distribution pipe 2 equipped with a cover 4
Is inserted from the opening end of the fuel distribution pipe 1 on the side opposite to the pressure control valve 8, and the tip of the flow pipe 2 is inserted into the O of the pressure control valve 8.
While being fitted to the ring 22, the O-ring 25 provided on the cover 4 is fitted to the end portion of the fuel distribution pipe 1 to be assembled.
Since the insertion portion of the cover 4 is short and the clearance fits, it is difficult to obtain straightness. Also, the O-ring 23 provided for the distribution pipe 2 is fitted and assembled to the cover 4, but the insertion portion of the distribution pipe 2 is also short,
Moreover, since it is a clearance fit, the straightness is difficult to be obtained, and the distribution pipe 2 cannot be attached properly. Further, since both ends of the long flow pipe 2 are fixed by the elastic O-rings 22 and 23, there is a problem that the flow pipe 2 is easily vibrated and noise is easily generated. The present invention eliminates the support of both ends of the flow pipe 2 by the O-rings fitted in the O-ring mounting grooves, improves the assembling property of the flow pipe, and prevents the vibration and noise of the flow pipe. That is the purpose.
【０００４】[0004]
【課題を解決するための手段】本発明者は前記目的を達
成するために第１の発明は、燃料タンクから燃料を圧送
する燃料ポンプと、燃料ポンプから圧送される燃料を各
燃料噴射弁に分配する燃料分配管（１）と、燃料ポンプ
から圧送される燃料の圧力を所定圧力に制御する圧力制
御弁（８）と、圧力制御弁（８）から燃料タンクヘ戻さ
れる余分な燃料が流通する流通管（２）とを具備し、か
つ上記の流通管（２）が圧力制御弁（８）を介して、燃
料分配管（１）の中に設けられた内燃機関の燃料分配路
（Ａ）において、流通管（２）の一端である圧力制御弁
（８）との接続部に円錐形状の弾性体を設け、圧力制御
弁（８）の流通管（２）との接続部入り口をテ−パ状又
はＲ形状とし、かつ流通管（２）の他端をろう付け又は
溶接にて接続したことを特徴とするものである。Means for Solving the Problems In order to achieve the above-mentioned object, the present invention relates to a first invention, in which a fuel pump for pumping fuel from a fuel tank and a fuel pumped from the fuel pump are supplied to each fuel injection valve. The fuel distribution pipe (1) to be distributed, the pressure control valve (8) for controlling the pressure of the fuel pumped from the fuel pump to a predetermined pressure, and the excess fuel returned from the pressure control valve (8) to the fuel tank circulate. A fuel distribution passage (A) for an internal combustion engine, which is provided with a distribution pipe (2) and which is provided in the fuel distribution pipe (1) through the pressure control valve (8). At the end of the flow pipe (2), a conical elastic body is provided at the connection with the pressure control valve (8), and the inlet of the connection part of the pressure control valve (8) with the flow pipe (2) is connected to the end. It has a pear shape or an R shape, and the other end of the flow pipe (2) is connected by brazing or welding. And it is characterized in and.
【０００５】第２の発明は、燃料タンクから燃料を圧送
する燃料ポンプと、燃料ポンプから圧送される燃料を各
燃料噴射弁に分配する燃料分配管（１）と、燃料ポンプ
から圧送される燃料の圧力を所定圧力に制御する圧力制
御弁（８）と、圧力制御弁（８）から燃料タンクヘ戻さ
れる余分な燃料が流通する流通管（２）とを具備し、か
つ、上記流通管（２）が圧力制御弁（８）を介して、燃
料分配管（１）の中に設けられた内燃機関の燃料分配路
（Ａ）において、流通管（２）の一端にＯリング（１
９）を取り付け、かつ圧力制御弁（８）の流通管（２）
との接続部の入り口部をテ−パ状又はＲ形状とし、Ｏリ
ング（１１）をそのテ−パ部又はＲ形状部に圧着してシ
−ルさせ、かつ流通管（２）の他端をろう付け又は溶接
にて接続したことを特徴とする。A second aspect of the present invention is a fuel pump that pumps fuel from a fuel tank, a fuel distribution pipe (1) that distributes the fuel that is pumped from the fuel pump to each fuel injection valve, and a fuel that is pumped from the fuel pump. A pressure control valve (8) for controlling the pressure of the pressure control valve to a predetermined pressure and a flow pipe (2) through which excess fuel returned from the pressure control valve (8) to the fuel tank flows, and the flow pipe (2) ) Via the pressure control valve (8), in the fuel distribution passage (A) of the internal combustion engine provided in the fuel distribution pipe (1), an O-ring (1) is attached to one end of the flow pipe (2).
9) is attached, and the flow pipe (2) of the pressure control valve (8)
The inlet portion of the connection portion with and is formed into a taper shape or an R shape, the O ring (11) is crimped to the taper portion or the R shape portion to seal, and the other end of the flow pipe (2). Are connected by brazing or welding.
【０００６】第３の発明は、燃料タンクから燃料を圧送
する燃料ポンプと、燃料ポンプから圧送される燃料を各
燃料噴射弁に分配する燃料分配管（１）と、燃料ポンプ
から圧送される燃料の圧力を所定圧力に制御する圧力制
御弁（８）と、圧力制御弁（８）から燃料タンクヘ戻さ
れる余分な燃料が流通する流通管（２）とを具備し、か
つ、上記流通管（２）が圧力制御弁（８）を介して、燃
料分配管（１）の中に設けられた内燃機関の燃料分配管
（１）において、流通管（２）の一端と圧力制御弁
（８）を接着剤で固定し、圧力制御弁（８）の流通管
（２）との接続部入り口をテ−パ状又はＲ形状とし、か
つ流通管（２）の他端をろう付け又は溶接にて接続した
ことを特徴とするものである。A third aspect of the invention is a fuel pump for pumping fuel from a fuel tank, a fuel distribution pipe (1) for distributing the fuel pumped from the fuel pump to each fuel injection valve, and a fuel pumped for fuel from the fuel pump. A pressure control valve (8) for controlling the pressure of the pressure control valve to a predetermined pressure and a flow pipe (2) through which excess fuel returned from the pressure control valve (8) to the fuel tank flows, and the flow pipe (2) ) Via the pressure control valve (8), in the fuel distribution pipe (1) of the internal combustion engine provided in the fuel distribution pipe (1), one end of the flow pipe (2) and the pressure control valve (8) The pressure control valve (8) is fixed with an adhesive, the inlet of the connection portion with the flow pipe (2) of the pressure control valve (8) is tapered or R-shaped, and the other end of the flow pipe (2) is connected by brazing or welding. It is characterized by having done.
【０００７】[0007]
【作用】流通管（２）をろう付け又は溶接にて固定する
ことで流通管（２）の真直度が出しやすく、かつしっか
り固定できる。また圧力制御弁（８）の挿入穴（１５
ａ）入り口部をテ−パ状又はＲ形状としたことで流通管
（２）の挿入性をよくした。また流通管（２）の一端を
弾性体に押し圧力をもって、あるいは接着剤により、他
端をろう付けでしっかり固定されるため、流通管（２）
の振動や騒音も防止できる。By fixing the flow pipe (2) by brazing or welding, the straightness of the flow pipe (2) can be easily obtained and can be firmly fixed. Further, the pressure control valve (8) has an insertion hole (15
a) By making the inlet part tapered or R-shaped, the insertability of the flow pipe (2) was improved. Further, since one end of the flow pipe (2) is firmly fixed to the elastic body by pressing pressure or an adhesive, the other end of the flow pipe (2) is firmly fixed by brazing.
Vibration and noise can be prevented.
【０００８】[0008]
【実施例】本発明の第１実施例について１図及び２図に
基ずき説明する。図１は燃料分配路Ａを示し、燃料は図
示しない燃料タンクから図示しない電動式燃料噴射ポン
プより圧送される。この圧送された燃料は燃料分配管１
にメインパイプ３より導入され、この燃料分配管１のそ
れぞれの燃料噴射弁取り付け穴６より、前記従来のよう
な燃料噴射弁２４に分配される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a fuel distribution path A, and fuel is pressure-fed from a fuel tank (not shown) by an electric fuel injection pump (not shown). This pumped fuel is the fuel distribution pipe 1
Is introduced from the main pipe 3 into each of the fuel distribution pipes 1 and is distributed to the conventional fuel injection valves 24 through the respective fuel injection valve mounting holes 6.
【０００９】燃料分配管１のメインパイプ３の反対側の
端部には、圧力制御弁８が取り付け板７によりボルト９
で固定され、この圧力制御弁８の一端は、燃料分配管１
の内部に突出している。なお燃料分配管１と圧力制御弁
８の間は液密を保つためにＯリング１１でシ−ルしてい
る。At the end of the fuel distribution pipe 1 opposite to the main pipe 3, a pressure control valve 8 is attached by a mounting plate 7 to a bolt 9
The pressure control valve 8 has one end fixed to the fuel distribution pipe 1
Protruding inside. An O-ring 11 seals between the fuel distribution pipe 1 and the pressure control valve 8 to maintain liquid tightness.
【００１０】この圧力制御弁８の内部には、保持部１２
を介してバルブ１３を備えたダイアフラム（図示せず）
が設けられていると共に、スプリング（図示せず）によ
りバルブ１３を閉じる方向に付勢している。またバルブ
１３はシート部材１４に上記のスプリングの押圧力で当
接し、シールするようになっている。このシート部材１
４は、ホルダー１５を介してケーシング１６に取り付け
られている。またケーシング１６には連通穴１６ａが設
けられている。そして燃料分配管１の内部の燃料圧力が
所定値より大きくなると連通穴１６ａを介してバルブ１
３にこの圧力が伝えられ、バルブ１３を図示しないスプ
リングの付勢力に抗してリフトさせ余分な燃料をシート
部材１４、流通管２を経由して燃料タンクに戻すように
なっている。Inside the pressure control valve 8, a holding portion 12 is provided.
Diaphragm with valve 13 through (not shown)
And a spring (not shown) urges the valve 13 in the closing direction. Further, the valve 13 comes into contact with the seat member 14 by the pressing force of the spring to seal the seat member 14. This sheet member 1
4 is attached to the casing 16 via the holder 15. Further, the casing 16 is provided with a communication hole 16a. When the fuel pressure inside the fuel distribution pipe 1 becomes higher than a predetermined value, the valve 1 passes through the communication hole 16a.
This pressure is transmitted to the valve 3, and the valve 13 is lifted against the urging force of a spring (not shown) to return excess fuel to the fuel tank via the seat member 14 and the flow pipe 2.
【００１１】流通管２と圧力制御弁８の接続は、ケーシ
ング１６に取り付けられたホルダー１５に流通管２の端
部を挿入して行う。このホルダー１５の一端部内には、
シート部材１４が取り付けられており、他端部内には、
流通管２の外径より少し大きな径の挿入穴１５ａが設け
られている。また挿入穴１５ａの入り口部には、テーパ
部１５ｂが設けられており、流通管２の挿入時に、この
テーパ部１５ｂがガイドの役割をはたし流通管２が挿入
しやすくなっている。又このテーパ部１５ｂは、Ｒ形状
でも同様の効果を有する。The connection between the flow pipe 2 and the pressure control valve 8 is performed by inserting the end of the flow pipe 2 into the holder 15 attached to the casing 16. In one end of this holder 15,
A seat member 14 is attached, and in the other end,
An insertion hole 15a having a diameter slightly larger than the outer diameter of the flow pipe 2 is provided. Further, a taper portion 15b is provided at the entrance of the insertion hole 15a, and when the flow pipe 2 is inserted, the taper portion 15b serves as a guide so that the flow pipe 2 can be easily inserted. Further, the tapered portion 15b has the same effect even if it has an R shape.
【００１２】一方、流通管２の外周には、組み付けた状
態でホルダーのテーパ部１５ｂに押圧して固定できる位
置に弾性体でできた円錐状のブッシュ１７が取り付けら
れており、その円錐状のブッシュ１７とテーパ部１５ｂ
間でシールできるようになっている。弾性体で出来た円
錐状のブッシュ１７としては、例えば、ゴムや樹脂でい
えばエラストマが該当する。On the other hand, a conical bush 17 made of an elastic body is attached to the outer circumference of the flow pipe 2 at a position where it can be pressed and fixed to the tapered portion 15b of the holder in the assembled state. Bush 17 and tapered portion 15b
You can seal between them. The cone-shaped bush 17 made of an elastic body corresponds to, for example, an elastomer in the case of rubber or resin.
【００１３】また、円錐形状のブッシュ１７の底部側に
は、ブッシュ１７のズレ防止のため、流通管２に突起２
ａが設けられている。一方圧力制御弁８が取り付けられ
てない方は、ろう付け又は溶接によりカバー４に垂直に
固定されている。On the bottom side of the conical bush 17, a projection 2 is formed on the flow pipe 2 to prevent the bush 17 from being displaced.
a is provided. On the other hand, the one without the pressure control valve 8 is vertically fixed to the cover 4 by brazing or welding.
【００１４】次に前記構成部品の組み付け方法を説明す
る。Ｏリング１１を組み付けた状態の圧力制御弁８を燃
料分配管１に挿入した後、取り付け板７をはめ込みボル
ト９で固定する。一方カバー４にメインパイプ３と流通
管２をろう付け又は溶接で垂直に固定しておくと共に流
通管２の先端部にブッシュ１７を流通管２の突起２ａに
当接するまで挿入する。この状態で前記圧力制御弁８を
組み付けた状態の燃料分配管１側にＯリング５を取り付
けてから、前記の流通管２を挿入する。この時、流通管
２の先端が圧力制御弁８の挿入穴１５ａ内に入るように
挿入する。次にボルト１０で固定する。次に図示しない
燃料噴射弁を燃料噴射弁取り付け穴６に取り付けた後、
図示しないエンジンに組み付ける。Next, a method of assembling the above-mentioned components will be described. After inserting the pressure control valve 8 with the O-ring 11 assembled into the fuel distribution pipe 1, the mounting plate 7 is fixed with the fitting bolt 9. On the other hand, the main pipe 3 and the distribution pipe 2 are vertically fixed to the cover 4 by brazing or welding, and the bush 17 is inserted into the tip of the distribution pipe 2 until it abuts on the projection 2a of the distribution pipe 2. In this state, the O-ring 5 is attached to the fuel distribution pipe 1 side with the pressure control valve 8 assembled, and then the flow pipe 2 is inserted. At this time, the distal end of the flow pipe 2 is inserted so as to enter the insertion hole 15a of the pressure control valve 8. Next, it is fixed with the bolt 10. Next, after attaching a fuel injection valve (not shown) to the fuel injection valve attachment hole 6,
Attach to an engine (not shown).
【００１５】以上のように、上記の燃料分配管１におい
て流通管２のシール用に従来用いられていた２個のＯリ
ングをろう付けと、円錐ブッシュ１７で代用したことに
より、Ｏリング取り付け溝の加工が不要になった。また
流通管２とカバー４をあらかじめろう付け又は溶接にて
固定することで流通管２の真直度が出しやすくなった。
また、圧力制御弁８の挿入穴入り口部をテーパ状又はＲ
形状としたことで流通管２の組み付け性がよくなった。
またＯリングを廃止したことで挿入時のＯリング切れも
なくせる。また流通管２を組み付けた状態では、一端が
円錐ブッシュ１７に押圧力をもって固定され、他端はろ
う付け又は溶接にてしっかり固定されているため、流通
管２の振動や騒音も防止できる。As described above, by brazing the two O-rings conventionally used for sealing the flow pipe 2 in the fuel distribution pipe 1 and substituting the conical bush 17, the O-ring mounting groove is formed. No more processing is required. Further, by fixing the distribution pipe 2 and the cover 4 in advance by brazing or welding, the straightness of the distribution pipe 2 can be easily obtained.
Further, the inlet of the pressure control valve 8 is tapered or R-shaped.
The shape makes the assembling property of the flow pipe 2 better.
Also, by eliminating the O-ring, it is possible to prevent the O-ring from breaking during insertion. Further, when the flow pipe 2 is assembled, one end is fixed to the conical bush 17 with a pressing force and the other end is firmly fixed by brazing or welding, so that the vibration and noise of the flow pipe 2 can be prevented.
【００１６】次に第２実施例について３図を用いて説明
する。第２実施例は第１実施例の円錐ブッシュ１７をＯ
リング１９に変更し、そのＯリング１９の切れを防止
し、かつ正確に押圧するためのスペーサー２０を設けた
ところのみが異なり、他の構成においては第１実施例と
同じである。Ｏリング１９は取り付け状態で圧力制御弁
８のテーパ部１５ｂに押圧力をもって取り付けられると
共にスペーサー２０を介して突起２ａに当接する。Ｏリ
ング１９がテーパ部１５ｂに押圧力をもって当接するた
め第１実施例と同様の効果を有する。又、テーパ部１５
ｂはＲ形状としても同様の効果を有する。Next, a second embodiment will be described with reference to FIG. In the second embodiment, the conical bush 17 of the first embodiment is replaced with O
The ring 19 is changed to a spacer 20 for preventing the O-ring 19 from being broken and for accurately pressing the ring 19, and is otherwise the same as the first embodiment. In the attached state, the O-ring 19 is attached to the tapered portion 15b of the pressure control valve 8 with a pressing force and abuts the protrusion 2a via the spacer 20. Since the O-ring 19 comes into contact with the tapered portion 15b with a pressing force, it has the same effect as that of the first embodiment. Also, the tapered portion 15
b has the same effect even if it has an R shape.
【００１７】次に第３実施例について４図を用いて説明
する。第３実施例は、第１実施例の円錐ブッシュ１７と
そのストッパの役目をする突起２ａをなくしたものであ
り、その代用として、流通管２の圧力制御弁８への挿入
部分を接着剤２１で固定したものである。第３実施例に
おいても圧力制御弁８を接着剤２１にて強固に固定する
ため、第１実施例と同様の効果を有する。Next, a third embodiment will be described with reference to FIG. In the third embodiment, the conical bush 17 of the first embodiment and the projection 2a serving as a stopper thereof are eliminated, and as an alternative, the insertion portion of the flow pipe 2 into the pressure control valve 8 is provided with an adhesive 21. It is fixed with. Also in the third embodiment, since the pressure control valve 8 is firmly fixed with the adhesive 21, the same effect as that of the first embodiment is obtained.
【００１８】[0018]
【発明の効果】以上述べてきたように本発明において
は、流通管の固定及びシールを一端は、ろう付け又は溶
接で他端は円錐ブッシュで行うことにより、従来必要だ
ったＯリング取り付け溝の加工を不要とした。また流通
管とカバーをあらかじめろう付け又は溶接にて固定する
ことで流通管の真直度を出しやすくしたことと、圧力制
御弁の挿入穴入り口部をテーパ状又はＲ形状としたこと
で流通管の挿入性がよくなった。また流通管を組み付け
た状態で円錐ブッシュに押圧力をもって固定され、他端
はろう付け又は溶接にてしっかり固定されているため、
流通管の振動や騒音も防止できる。As described above, according to the present invention, the fixing and sealing of the flow pipe is performed by brazing or welding at one end and a conical bush at the other end. No need for processing. Also, by fixing the flow pipe and the cover in advance by brazing or welding, it is easy to obtain the straightness of the flow pipe, and the inlet of the pressure control valve has a tapered or R shape to make the flow pipe Insertability has improved. Also, since the flow pipe is assembled, it is fixed to the conical bush with a pressing force, and the other end is firmly fixed by brazing or welding.
Vibration and noise of the distribution pipe can also be prevented.
【００１９】[0019]
【図１】 本発明の第１実施例を示す縦断面図。FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
【図２】 本発明の第１実施例の圧力制御弁まわりの拡
大縦断面図。FIG. 2 is an enlarged vertical sectional view around the pressure control valve according to the first embodiment of the present invention.
【図３】 本発明の第２実施例の圧力制御弁まわりの拡
大縦断面図。FIG. 3 is an enlarged vertical sectional view around a pressure control valve according to a second embodiment of the present invention.
【図４】 本発明の第３実施例の圧力制御弁まわりの拡
大縦断面図。FIG. 4 is an enlarged vertical sectional view around a pressure control valve according to a third embodiment of the present invention.
【図５】 従来構造を示す図。FIG. 5 is a view showing a conventional structure.
Ａ 燃料分配路 １ 燃料分配管 ２ 流通管 ８ 圧力制御弁 １５ｂ テーパ部 １７ 円錐状のブッシュ １９ Ｏリング ２１ 接着剤 A fuel distribution passage 1 fuel distribution pipe 2 flow pipe 8 pressure control valve 15b taper portion 17 conical bush 19 O-ring 21 adhesive
Claims (3)
プと、燃料ポンプから圧送される燃料を各燃料噴射弁に
分配する燃料分配管と、燃料ポンプから圧送される燃料
の圧力を所定圧力に制御する圧力制御弁と、圧力制御弁
から燃料タンクヘ戻される余分な燃料が流通する流通管
とを具備し、かつ、上記の流通管が圧力制御弁を介し
て、燃料分配管の中に設けられた内燃機関の燃料分配路
において、流通管の一端である圧力制御弁との接続部に
円錐形状の弾性体を設け、圧力制御弁の流通管との接続
部入り口をテ−パ状又はＲ形状とし、かつ流通管の他端
をろう付け又は溶接にて接続したことを特徴とする内燃
機関の燃料分配路における流通管と燃料分配管との接続
構造。1. A fuel pump for pumping fuel from a fuel tank, a fuel distribution pipe for distributing fuel pumped from the fuel pump to each fuel injection valve, and a pressure of fuel pumped from the fuel pump to a predetermined pressure. And a flow pipe through which excess fuel returned from the pressure control valve to the fuel tank flows, and the above-mentioned flow pipe is provided in the fuel distribution pipe via the pressure control valve. In a fuel distribution passage of an internal combustion engine, a conical elastic body is provided at a connection portion with one end of a flow pipe to a pressure control valve, and a connection portion inlet of the pressure control valve with the flow pipe is tapered or R-shaped. And a connection structure between a distribution pipe and a fuel distribution pipe in a fuel distribution passage of an internal combustion engine, characterized in that the other end of the distribution pipe is connected by brazing or welding.
プと、燃料ポンプから圧送される燃料を各燃料噴射弁に
分配する燃料分配管と、燃料ポンプから圧送される燃料
の圧力を所定圧力に制御する圧力制御弁と、圧力制御弁
から燃料タンクヘ戻される余分な燃料が流通する流通管
とを具備し、かつ、上記流通管が圧力制御弁を介して、
燃料分配管の中に設けられた内燃機関の燃料分配路にお
いて、流通管の一端にＯリングを取り付け、かつ圧力制
御弁の流通管との接続部入り口をテ−パ状又はＲ形状と
し、Ｏリングをそのテ−パ部又はＲ形状部に圧着してシ
−ルさせ、かつ流通管の他端をろう付け又は溶接にて接
続したことを特徴とする内燃機関の燃料分配路における
流通管と燃料分配管との接続構造。2. A fuel pump for pumping fuel from a fuel tank, a fuel distribution pipe for distributing the fuel pumped from the fuel pump to each fuel injection valve, and a pressure of the fuel pumped from the fuel pump to a predetermined pressure. Pressure control valve, and a flow pipe through which excess fuel returned from the pressure control valve to the fuel tank flows, and the flow pipe via the pressure control valve,
In the fuel distribution passage of the internal combustion engine provided in the fuel distribution pipe, an O-ring is attached to one end of the flow pipe, and the inlet of the connection portion of the pressure control valve with the flow pipe is tapered or R-shaped. A distribution pipe in a fuel distribution passage of an internal combustion engine, characterized in that the ring is crimped to the taper portion or the R-shaped portion for sealing, and the other end of the distribution pipe is connected by brazing or welding. Connection structure with fuel distribution pipe.
プと、燃料ポンプから圧送される燃料を各燃料噴射弁に
分配する燃料分配管と、燃料ポンプから圧送される燃料
の圧力を所定圧力に制御する圧力制御弁と、圧力制御弁
から燃料タンクヘ戻される余分な燃料が流通する流通管
とを具備し、かつ、上記流通管が圧力制御弁を介して、
燃料分配管の中に設けられた内燃機関の燃料分配路にお
いて、流通管の一端と圧力制御弁を接着剤で固定し、圧
力制御弁の流通管との接続部入り口をテーパ状又はＲ形
状としかつ流通管の他端をろう付け又は溶接にて接続し
たことを特徴とする内燃機関の燃料分配路における流通
管と燃料分配管との接続構造。3. A fuel pump for pumping fuel from a fuel tank, a fuel distribution pipe for distributing the fuel pumped from the fuel pump to each fuel injection valve, and a pressure of fuel pumped from the fuel pump to a predetermined pressure. Pressure control valve, and a flow pipe through which excess fuel returned from the pressure control valve to the fuel tank flows, and the flow pipe via the pressure control valve,
In the fuel distribution passage of the internal combustion engine provided in the fuel distribution pipe, one end of the flow pipe and the pressure control valve are fixed with an adhesive, and the inlet of the connection portion of the pressure control valve with the flow pipe is tapered or R-shaped. A connecting structure between the distribution pipe and the fuel distribution pipe in a fuel distribution passage of an internal combustion engine, characterized in that the other end of the distribution pipe is connected by brazing or welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5344295A JPH07167008A (en) | 1993-12-17 | 1993-12-17 | Connection structure between flow pipe and fuel distribution pipe in fuel distribution line for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5344295A JPH07167008A (en) | 1993-12-17 | 1993-12-17 | Connection structure between flow pipe and fuel distribution pipe in fuel distribution line for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07167008A true JPH07167008A (en) | 1995-07-04 |
Family
ID=18368138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5344295A Pending JPH07167008A (en) | 1993-12-17 | 1993-12-17 | Connection structure between flow pipe and fuel distribution pipe in fuel distribution line for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07167008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979110A (en) * | 1995-09-13 | 1997-03-25 | Unisia Jecs Corp | Fuel piping device |
-
1993
- 1993-12-17 JP JP5344295A patent/JPH07167008A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979110A (en) * | 1995-09-13 | 1997-03-25 | Unisia Jecs Corp | Fuel piping device |
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