JPH08270524A - Fuel delivery pipe - Google Patents

Fuel delivery pipe

Info

Publication number
JPH08270524A
JPH08270524A JP7075551A JP7555195A JPH08270524A JP H08270524 A JPH08270524 A JP H08270524A JP 7075551 A JP7075551 A JP 7075551A JP 7555195 A JP7555195 A JP 7555195A JP H08270524 A JPH08270524 A JP H08270524A
Authority
JP
Japan
Prior art keywords
fuel
injection valve
fuel injection
heat
delivery pipe
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
Application number
JP7075551A
Other languages
Japanese (ja)
Inventor
Tamio Asano
民雄 浅野
Hidekazu Miyazaki
秀和 宮崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP7075551A priority Critical patent/JPH08270524A/en
Publication of JPH08270524A publication Critical patent/JPH08270524A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04Injectors with heating, cooling, or thermally-insulating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws

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

PURPOSE: To provide a fuel delivery pipe which can suppress generation of vapor due to temperature rise of fuel in a fuel injection valve. CONSTITUTION: A delivery pipe body 1 is formed of a stainless steel cylindrical pipe material. A plurality of installation holes 2 are formed on the lower surface of the delivery pipe body 1. A fuel injection valve 3 is inserted into and supported by the installation hole 2. A heat insulative cover 4 is arranged so as to surround the installation portion of the fuel injection valve 3 of he delivery pipe body 1 and an outer periphery of the fuel injection valve 3, The heat insulative cover 4 is integrated with an installation stay 7 for fixing the heat insulative cover 4 to an engine. Heat generated by the engine is interrupted reaching the fuel injection valve 3 and the pipe body 1 by means of the heat insulative cover 4. It is thus possible to suppress temperature rise in fuel in the fuel injection valve 3, and suppress the generation of vapor in the fuel.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、燃料を燃料噴射弁に
分配するための燃料デリバリパイプに関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel delivery pipe for distributing fuel to fuel injection valves.

【0002】[0002]

【従来の技術】従来、内燃機関における燃料供給系で
は、燃料タンクの燃料が燃料ポンプによって汲み上げら
れ燃料デリバリパイプに供給されるとともに、その燃料
が燃料デリバリパイプから内燃機関の各気筒毎に設けら
れた燃料噴射弁に分配される。そして、燃料噴射弁から
対応する気筒へ燃料が噴射されるようになっている。
2. Description of the Related Art Conventionally, in a fuel supply system for an internal combustion engine, fuel in a fuel tank is pumped up by a fuel pump and supplied to a fuel delivery pipe, and the fuel is provided from the fuel delivery pipe to each cylinder of the internal combustion engine. Fuel injection valve. Then, the fuel is injected from the fuel injection valve to the corresponding cylinder.

【0003】[0003]

【発明が解決しようとする課題】ところが、前記燃料噴
射弁は内燃機関近傍に配置されているため、内燃機関が
駆動されて高温となると内燃機関から発せられる熱(例
えば、輻射熱)を吸収する。その結果、同燃料噴射弁内
の燃料中にベーパが発生することがあった。すると、ベ
ーパの混入した燃料が燃料噴射弁から噴射され、所定量
の燃料が各気筒に供給されなくなり、内燃機関の空燃比
制御が不安定になるおそれがあった。
However, since the fuel injection valve is arranged in the vicinity of the internal combustion engine, when the internal combustion engine is driven to a high temperature, it absorbs heat (for example, radiant heat) emitted from the internal combustion engine. As a result, vapor was sometimes generated in the fuel in the fuel injection valve. Then, fuel mixed with vapor is injected from the fuel injection valve, and a predetermined amount of fuel is not supplied to each cylinder, which may make the air-fuel ratio control of the internal combustion engine unstable.

【0004】本発明は上記問題点を解決するためになさ
れたものであって、その目的は、燃料噴射弁内の燃料に
おけるベーパの発生を抑制することができる燃料デリバ
リパイプを提供することにある。
The present invention has been made to solve the above problems, and an object thereof is to provide a fuel delivery pipe capable of suppressing the generation of vapor in the fuel in the fuel injection valve. .

【0005】[0005]

【課題を解決するための手段】請求項1に記載の発明
は、燃料の供給を受けるデリバリパイプ本体と、前記デ
リバリパイプ本体に取着される燃料噴射弁の外周を覆う
ように前記デリバリパイプ本体に配設された熱遮断用カ
バーとを備えた燃料デリバリパイプを上記技術課題を解
決するための手段とするものである。
According to a first aspect of the present invention, there is provided a delivery pipe main body for receiving fuel supply and a delivery pipe main body so as to cover an outer periphery of a fuel injection valve attached to the delivery pipe main body. A fuel delivery pipe provided with a heat-shielding cover provided in the above is a means for solving the above technical problems.

【0006】請求項2に記載の発明は、請求項1に記載
した燃料デリバリパイプにおいて、前記熱遮断用カバー
は燃料噴射弁に加え、デリバリパイプ本体を覆うもので
あることをその要旨とするものである。
The invention according to claim 2 is summarized in that, in the fuel delivery pipe according to claim 1, the heat cutoff cover covers not only the fuel injection valve but also the delivery pipe body. Is.

【0007】[0007]

【作用】請求項1に記載の発明によれば、燃料は燃料デ
リバリパイプを通り燃料噴射弁に分配される。一方、内
燃機関の駆動に伴い内燃機関から熱が発せられる。この
熱は燃料噴射弁に至る前に熱遮断用カバーにて遮られ
る。よって、この熱による燃料の温度上昇が抑制され、
燃料噴射弁内の燃料におけるベーパの発生が抑制され
る。
According to the invention described in claim 1, the fuel is distributed to the fuel injection valve through the fuel delivery pipe. On the other hand, as the internal combustion engine is driven, heat is generated from the internal combustion engine. This heat is blocked by the heat blocking cover before reaching the fuel injection valve. Therefore, the temperature rise of the fuel due to this heat is suppressed,
Generation of vapor in the fuel in the fuel injection valve is suppressed.

【0008】請求項2に記載の発明によれば、請求項1
に記載した発明の作用に加え、熱遮断用カバーにより燃
料噴射弁及び燃料デリバリパイプが覆われているので、
より燃料の温度上昇が抑制される。
According to the invention of claim 2, claim 1
In addition to the operation of the invention described in (1), since the fuel injection valve and the fuel delivery pipe are covered by the heat blocking cover,
Further, the temperature rise of the fuel is suppressed.

【0009】[0009]

【実施例】【Example】

(第1実施例)本発明を多気筒ガソリンエンジンの燃料
デリバリパイプに具体化した第1実施例について図1、
図2、及び図5を参照して説明する。
(First Embodiment) FIG. 1 shows a first embodiment in which the present invention is embodied in a fuel delivery pipe of a multi-cylinder gasoline engine.
This will be described with reference to FIGS. 2 and 5.

【0010】本実施例における燃料デリバリパイプPは
デリバリパイプ本体1(以下、単にパイプ本体1とい
う)と、熱遮断用カバー4とを備えている。同パイプ本
体1はステンレス製(鉄製、アルミニウム製、あるいは
合成樹脂製であってもよい)の円筒形パイプ材より形成
されており、その下面には取付孔2が形成されている。
この取付孔2はパイプ本体1の軸心方向(図1において
紙面垂直方向)に沿って複数形成されている。そして、
同取付孔2にはエンジンの気筒毎に設けられた燃料噴射
弁3の上部が挿入支持されている。同燃料噴射弁3の下
部は吸気ポート(図示しない)近傍の吸気マニホールド
(図示しない)に挿入されている。また、燃料噴射弁3
の先端側(図1の下端側)は燃料を噴射する噴射孔3a
とされ、同噴射孔3aから燃料がエンジンの吸気ポート
に供給されるようになっている。パイプ本体1の内部に
は燃料タンクから燃料ポンプ(いずれも図示しない)に
より汲み上げられた燃料(ガソリン)が供給されてい
る。そして、その燃料はパイプ本体1から燃料噴射弁3
に供給され、同燃料噴射弁3の開弁に伴いエンジンの気
筒内に噴射される。
The fuel delivery pipe P in this embodiment includes a delivery pipe body 1 (hereinafter, simply referred to as the pipe body 1) and a heat blocking cover 4. The pipe body 1 is made of a stainless steel (may be made of iron, aluminum, or synthetic resin) cylindrical pipe material, and a mounting hole 2 is formed in the lower surface thereof.
A plurality of the mounting holes 2 are formed along the axial direction of the pipe body 1 (the direction perpendicular to the paper surface in FIG. 1). And
An upper portion of a fuel injection valve 3 provided for each cylinder of the engine is inserted and supported in the mounting hole 2. The lower portion of the fuel injection valve 3 is inserted into an intake manifold (not shown) near the intake port (not shown). In addition, the fuel injection valve 3
The tip side (lower end side in FIG. 1) of the injection hole 3a for injecting fuel
The fuel is supplied from the injection hole 3a to the intake port of the engine. Fuel (gasoline) pumped by a fuel pump (neither is shown) is supplied from the fuel tank to the inside of the pipe body 1. The fuel is supplied from the pipe body 1 to the fuel injection valve 3
And is injected into the cylinder of the engine when the fuel injection valve 3 is opened.

【0011】パイプ本体1における燃料噴射弁3の取り
付け箇所及び燃料噴射弁3にはその外周を覆う熱遮断用
カバー4が設けられている。同熱遮断用カバー4の上部
はパイプ本体1における燃料噴射弁3の設置部分を覆っ
ている。また、熱遮断用カバーの下部には3つの帯状部
5a〜5cが垂下され、同帯状部5a〜5cにより燃料
噴射弁3の露出した部分が覆われている。この熱遮断用
カバー4は所定の厚みを有する合成樹脂よりなり、エン
ジンから発せられる熱を遮蔽することができるようにな
っている。
The pipe body 1 is provided with a heat insulating cover 4 for covering the outer periphery of the fuel injection valve 3 and the mounting position of the fuel injection valve 3. The upper portion of the heat blocking cover 4 covers the installation portion of the fuel injection valve 3 in the pipe body 1. Further, three strip-shaped portions 5a to 5c are hung from the lower portion of the heat shield cover, and the exposed portions of the fuel injection valve 3 are covered by the strip-shaped portions 5a to 5c. The heat shield cover 4 is made of a synthetic resin having a predetermined thickness, and can shield the heat generated from the engine.

【0012】熱遮断用カバー4は前記帯状部5a〜5
c、パイプ本体1が挿通される挿通孔6、及び取付ステ
ー7を備えている。また、前記帯状部5aと、帯状部5
b及び5cとの間には前記挿通孔6に繋がる2つの切欠
き8a,8bが形成されるとともに、前記帯状部5bと
帯状部5cとの間にも同じく切欠き8cが形成されてい
る。熱遮断用カバー4を取り付ける際には、前記両切欠
き8a,8bを熱遮断用カバー4の弾性に抗して僅かに
拡げ、図2の矢印によって示す方向からパイプ本体1及
び燃料噴射弁3を覆う状態に取り付ける。熱遮断用カバ
ー4が取り付けられると、前記挿通孔6における熱遮断
用カバー4の内周壁面はパイプ本体1の外周面に密着す
る。したがって、パイプ本体1は熱遮断用カバーの挿通
孔6にて支持される。また、前記切欠き8cからは燃料
噴射弁3のコネクタ部3bが突出される。
The heat-shielding cover 4 is composed of the strip-shaped portions 5a-5.
c, an insertion hole 6 through which the pipe body 1 is inserted, and a mounting stay 7. In addition, the strip-shaped portion 5a and the strip-shaped portion 5
Two notches 8a and 8b connected to the insertion hole 6 are formed between b and 5c, and a notch 8c is also formed between the band-shaped portions 5b and 5c. When the heat shield cover 4 is attached, the notches 8a and 8b are slightly expanded against the elasticity of the heat shield cover 4, and the pipe body 1 and the fuel injection valve 3 are inserted in the direction shown by the arrow in FIG. Attach to cover. When the heat shielding cover 4 is attached, the inner peripheral wall surface of the heat shielding cover 4 in the insertion hole 6 comes into close contact with the outer peripheral surface of the pipe body 1. Therefore, the pipe body 1 is supported by the insertion hole 6 of the heat shield cover. Further, the connector portion 3b of the fuel injection valve 3 projects from the cutout 8c.

【0013】前記帯状部5aにおいてパイプ本体1寄り
の位置にはボルト孔7aを有する取付ステー7が外方に
突出されて形成されている。ボルト孔7aにはボルト9
が挿通され、取付ステー7はカラー10を介し同ボルト
9にてエンジンのシリンダヘッド11に固定されてい
る。このように、熱遮断用カバー4が取付ステー7にて
シリンダヘッド11に取り付けられると、パイプ本体1
もシリンダヘッド11に対して固定される。
A mounting stay 7 having a bolt hole 7a is formed at a position near the pipe body 1 in the strip-shaped portion 5a so as to project outward. The bolt 9 is in the bolt hole 7a.
The mounting stay 7 is fixed to the cylinder head 11 of the engine with the bolt 9 via the collar 10. In this way, when the heat insulation cover 4 is attached to the cylinder head 11 by the attachment stay 7, the pipe body 1
Is also fixed to the cylinder head 11.

【0014】つぎに、上記構成を備えた第1実施例にお
ける作用及び効果について説明する。エンジンの運転が
開始されると燃料タンクの燃料が燃料ポンプによって汲
み上げられ、パイプ本体1に供給される。そして、所定
の燃料噴射タイミングになると燃料噴射弁3が開弁さ
れ、この開弁により燃料がパイプ本体1を通り燃料噴射
弁3の噴射口3aからエンジンの各気筒に噴射される。
Next, the operation and effect of the first embodiment having the above structure will be described. When the operation of the engine is started, the fuel in the fuel tank is pumped up by the fuel pump and supplied to the pipe body 1. Then, at a predetermined fuel injection timing, the fuel injection valve 3 is opened, and by this opening, fuel is injected from the injection port 3a of the fuel injection valve 3 to each cylinder of the engine through the pipe body 1.

【0015】このような燃料噴射動作に伴いエンジンの
運転がおこなわれ、その運転に伴ってエンジンは高温の
状態となる。そして、高温の状態となったエンジンから
は輻射熱等の熱が発せられる。熱の一部は前記燃料噴射
弁3及びパイプ本体1に対して放射されるが、この熱は
燃料噴射弁3及びパイプ本体1に至る前に熱遮断用カバ
ー4にて遮られる。より詳しくは、エンジンから燃料噴
射弁3及びパイプ本体1に対して直接に放射される輻射
熱、他の部材により反射されパイプ本体1や燃料噴射弁
3に対して放射される輻射熱、あるいはエンジンから空
気層を介して伝達される熱が前記熱遮断用カバー4によ
り遮蔽される。よって、燃料噴射弁3及びパイプ本体1
内の燃料においては、その熱による燃料の温度上昇が抑
制され、燃料中でのベーパの発生が抑制される。したが
って、例えばエンジンが高負荷で運転されても燃料噴射
弁3内の燃料にベーパが発生しにくくなり、ベーパの混
入した燃料が燃料噴射弁3から噴射される現象が抑制さ
れる。その結果、燃料噴射弁3から目的とする量の燃料
を各気筒に噴射させることが可能となるため、空燃比制
御不良といった不具合を未然に防止できる。
The engine is operated in accordance with such a fuel injection operation, and the engine is brought into a high temperature state with the operation. Then, heat such as radiant heat is emitted from the engine in a high temperature state. A part of the heat is radiated to the fuel injection valve 3 and the pipe body 1, but this heat is blocked by the heat blocking cover 4 before reaching the fuel injection valve 3 and the pipe body 1. More specifically, the radiant heat directly radiated from the engine to the fuel injection valve 3 and the pipe body 1, the radiant heat reflected by another member and radiated to the pipe body 1 and the fuel injection valve 3, or the air from the engine. The heat transmitted through the layers is shielded by the heat shield cover 4. Therefore, the fuel injection valve 3 and the pipe body 1
In the fuel inside, the temperature rise of the fuel due to the heat is suppressed, and the generation of vapor in the fuel is suppressed. Therefore, even if the engine is operated under a high load, for example, vapor is less likely to be generated in the fuel in the fuel injection valve 3, and the phenomenon in which fuel mixed with vapor is injected from the fuel injection valve 3 is suppressed. As a result, it is possible to inject a desired amount of fuel from the fuel injection valve 3 into each cylinder, so that it is possible to prevent problems such as poor air-fuel ratio control.

【0016】さらに、熱遮断用カバー4は燃料噴射弁3
に加え、パイプ本体1も覆っているため、燃料の温度上
昇がより抑制される。また、本実施例では熱遮断用カバ
ー4の材料として熱伝導率の小さい合成樹脂を採用して
いる。したがって、エンジンの熱が取付ステー7を介し
て熱遮断用カバー4側に伝導することが抑制される。す
なわち、熱遮断用カバー4が伝導熱により高温となるこ
とが防止されるため、燃料噴射弁3の伝導熱による温度
上昇を抑制できる。
Further, the heat insulating cover 4 is provided on the fuel injection valve 3
In addition, since the pipe body 1 is also covered, the temperature rise of the fuel is further suppressed. Further, in this embodiment, a synthetic resin having a small thermal conductivity is adopted as the material of the heat blocking cover 4. Therefore, the heat of the engine is suppressed from being conducted to the heat blocking cover 4 side via the mounting stay 7. That is, the heat-shielding cover 4 is prevented from reaching a high temperature due to conduction heat, so that the temperature rise due to conduction heat of the fuel injection valve 3 can be suppressed.

【0017】さらに、本実施例における熱遮断用カバー
4はパイプ本体1をエンジンに対して固定する際の支持
部材でもあるため、パイプ本体1における取付ブラケッ
ト等の取付部材が不要となっている。また、図5に示す
ように、本実施例における取付ステー7とカラー10と
を一体的に形成するとともに、ボルト孔7aを前記取付
ステー7及びカラー10を貫通するように形成すれば、
熱遮断カバー4のシリンダヘッド11への組み付けが容
易となる。
Further, since the heat shield cover 4 in this embodiment is also a supporting member for fixing the pipe body 1 to the engine, a mounting member such as a mounting bracket in the pipe body 1 is unnecessary. Further, as shown in FIG. 5, if the mounting stay 7 and the collar 10 in this embodiment are integrally formed and the bolt hole 7a is formed so as to penetrate the mounting stay 7 and the collar 10,
The heat insulation cover 4 can be easily assembled to the cylinder head 11.

【0018】(第2実施例)次に、本発明を第1実施例
と同じく多気筒ガソリンエンジンに取着される燃料デリ
バリパイプPとして具体化した第2実施例について図3
及び図4を参照して説明する。尚、上記第1実施例と同
様な構成については同一の符号を付すとともにその説明
を省略する。
(Second Embodiment) Next, a second embodiment in which the present invention is embodied as a fuel delivery pipe P attached to a multi-cylinder gasoline engine as in the first embodiment will be described with reference to FIG.
And FIG. 4 will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

【0019】本実施例において、エンジンから発せられ
る熱を遮断するための熱遮断用カバー4は合成樹脂から
なり、挿入孔4aを有した略円筒状に形成されている。
同熱遮断用カバー4には、これをシリンダヘッド11に
対して取り付けるためのボルト孔12aを有するカラー
12が一体的に形成されている。熱遮断用カバー4の上
部には燃料噴射弁3のコネクタ部3bが突出される切欠
き13が形成されている。パイプ本体1にはボルト孔1
4aを有する取付ブラケット14がロウ付けにより設け
られている。そして、前記カラー12及び取付ブラケッ
ト14のボルト孔12a,14aにはボルト9が挿通さ
れ、パイプ本体1及び熱遮断用カバー4は同ボルト9に
よりシリンダヘッド11に対して固定される。このと
き、パイプ本体1の取付孔2に取着されている燃料噴射
弁3は熱遮断用カバー4の挿入孔4aに挿入され、同燃
料噴射弁3の外周は熱遮断用カバー4により覆われた状
態となる。
In this embodiment, the heat blocking cover 4 for blocking the heat generated from the engine is made of synthetic resin and is formed in a substantially cylindrical shape having an insertion hole 4a.
The heat shield cover 4 is integrally formed with a collar 12 having a bolt hole 12a for attaching the heat shield cover 4 to the cylinder head 11. A notch 13 through which the connector portion 3b of the fuel injection valve 3 projects is formed in the upper portion of the heat blocking cover 4. Bolt hole 1 in pipe body 1
A mounting bracket 14 having 4a is provided by brazing. Bolts 9 are inserted into the bolt holes 12a and 14a of the collar 12 and the mounting bracket 14, and the pipe body 1 and the heat blocking cover 4 are fixed to the cylinder head 11 by the bolts 9. At this time, the fuel injection valve 3 attached to the mounting hole 2 of the pipe body 1 is inserted into the insertion hole 4a of the heat cutoff cover 4, and the outer periphery of the fuel injection valve 3 is covered with the heat cutoff cover 4. It will be in a state of being.

【0020】本実施例では上記第1実施例と同様に、燃
料噴射弁3の燃料中におけるベーパの発生を抑制するこ
とができる。また、熱遮断用カバー4にはカラー12が
一体的に設けられているため、同熱遮断用カバー4のエ
ンジンへの取付工程が容易となる。
In this embodiment, similarly to the first embodiment, it is possible to suppress the generation of vapor in the fuel of the fuel injection valve 3. Further, since the collar 12 is integrally provided on the heat shield cover 4, the process of mounting the heat shield cover 4 on the engine becomes easy.

【0021】以上、本発明を具体化した実施例について
説明したが、上記実施例の構成を以下のように変更する
こともできる。 (1) 上記実施例ではパイプ本体1をステンレス製の
円筒状パイプ材から構成したが、これは例えば、合成樹
脂製のパイプ材であってもよい。また、パイプ材に限定
されず、アルミ合金を押出成形することによって形成さ
れるパイプ本体を使用してもよい。
Although the embodiment of the present invention has been described above, the configuration of the above embodiment can be modified as follows. (1) In the above embodiment, the pipe body 1 is made of a stainless steel cylindrical pipe material, but it may be a synthetic resin pipe material, for example. Further, the pipe body is not limited to the pipe material, and a pipe body formed by extruding an aluminum alloy may be used.

【0022】(2) 上記実施例において熱遮断用カバ
ー4は合成樹脂により構成されているが、同熱遮断用カ
バー4は金属材料により構成することも可能である。ま
た、同熱遮断用カバー4は合成樹脂の表面に金属箔をコ
ーティングし、輻射熱の吸収率を低下させるようにした
多層構造の合成樹脂により構成されるものであってもよ
い。
(2) In the above embodiment, the heat blocking cover 4 is made of synthetic resin, but the heat blocking cover 4 can be made of a metal material. The heat blocking cover 4 may be made of a synthetic resin having a multi-layer structure in which a metal foil is coated on the surface of the synthetic resin so as to reduce the absorption rate of radiant heat.

【0023】以下に、特許請求の範囲に記載されないも
のであって、上記実施例から把握される技術的思想につ
いて記載する。 (a) 熱遮断用カバーは合成樹脂によって形成されて
なる請求項1に記載した燃料デリバリパイプ。
The technical ideas which are not described in the scope of claims but are understood from the above-mentioned embodiments will be described below. (A) The fuel delivery pipe according to claim 1, wherein the heat insulation cover is made of synthetic resin.

【0024】かかる構成によれば、熱遮断用カバーが熱
伝導率の小さい合成樹脂によって形成されるため、同熱
遮断用カバーの温度上昇が抑制され、燃料噴射弁内にお
ける燃料の温度上昇が抑制される。
According to this structure, since the heat cutoff cover is made of a synthetic resin having a small thermal conductivity, the temperature rise of the heat cutoff cover is suppressed, and the temperature rise of the fuel in the fuel injection valve is suppressed. To be done.

【0025】[0025]

【発明の効果】請求項1に記載の発明によれば、燃料噴
射弁における燃料の温度上昇が抑制され、燃料中でのベ
ーパの発生を抑制することができる。
According to the invention described in claim 1, the temperature rise of the fuel in the fuel injection valve is suppressed, and the generation of vapor in the fuel can be suppressed.

【0026】請求項2に記載の発明によれば、請求項1
に記載した発明の効果に加え、より燃料の温度上昇が抑
制される。
According to the invention of claim 2, claim 1
In addition to the effect of the invention described in (1), the temperature rise of the fuel is further suppressed.

【図面の簡単な説明】[Brief description of drawings]

【図1】 第1実施例におけるデリバリパイプ本体及び
熱遮断用カバーの断面図。
FIG. 1 is a cross-sectional view of a delivery pipe body and a heat blocking cover according to a first embodiment.

【図2】 同じく、熱遮断用カバーの形状を示す斜視
図。
FIG. 2 is a perspective view showing the shape of a heat blocking cover in the same manner.

【図3】 第2実施例におけるデリバリパイプ本体及び
熱遮断用カバーの断面図。
FIG. 3 is a cross-sectional view of a delivery pipe body and a heat blocking cover in the second embodiment.

【図4】 同じく、熱遮断用カバーの形状を示す斜視
図。
FIG. 4 is a perspective view showing the shape of a heat blocking cover.

【図5】 第1実施例における取付ステーの形状の変形
例を示す斜視図。
FIG. 5 is a perspective view showing a modification of the shape of the mounting stay in the first embodiment.

【符号の説明】[Explanation of symbols]

1…デリバリパイプ本体、3…燃料噴射弁、4…熱遮断
用カバー、5…シリンダヘッド(内燃機関)、P…燃料
デリバリイプ。
1 ... Delivery pipe main body, 3 ... Fuel injection valve, 4 ... Heat blocking cover, 5 ... Cylinder head (internal combustion engine), P ... Fuel delivery type.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 燃料の供給を受けるデリバリパイプ本体
と、 前記デリバリパイプ本体に取着される燃料噴射弁の外周
を覆うように前記デリバリパイプ本体に配設された熱遮
断用カバーとを備えたことを特徴とする燃料デリバリパ
イプ。
1. A delivery pipe main body for receiving fuel supply, and a heat-shielding cover arranged on the delivery pipe main body so as to cover an outer periphery of a fuel injection valve attached to the delivery pipe main body. A fuel delivery pipe characterized by that.
【請求項2】 前記熱遮断用カバーは燃料噴射弁に加
え、デリバリパイプ本体を覆うものである請求項1に記
載の燃料デリバリパイプ。
2. The fuel delivery pipe according to claim 1, wherein the heat blocking cover covers the delivery pipe main body in addition to the fuel injection valve.
JP7075551A 1995-03-31 1995-03-31 Fuel delivery pipe Pending JPH08270524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7075551A JPH08270524A (en) 1995-03-31 1995-03-31 Fuel delivery pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7075551A JPH08270524A (en) 1995-03-31 1995-03-31 Fuel delivery pipe

Publications (1)

Publication Number Publication Date
JPH08270524A true JPH08270524A (en) 1996-10-15

Family

ID=13579444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7075551A Pending JPH08270524A (en) 1995-03-31 1995-03-31 Fuel delivery pipe

Country Status (1)

Country Link
JP (1) JPH08270524A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006010244B3 (en) * 2006-03-02 2007-09-06 Benteler Automobiltechnik Gmbh Fuel distribution, for an internal combustion motor, has an injection molded plastics shrouding at the junction between the distribution tube and branch connections to the injectors with sleeve sections around them
JP2007247558A (en) * 2006-03-16 2007-09-27 Toyoda Gosei Co Ltd Heat insulating cover
CN100422539C (en) * 2002-10-31 2008-10-01 浙江飞亚电子有限公司 Electric controlled fuel oil injection four stroke gasoline engine
JP2013072430A (en) * 2011-09-29 2013-04-22 Denso Corp Mounting structure of fuel distribution pipe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100422539C (en) * 2002-10-31 2008-10-01 浙江飞亚电子有限公司 Electric controlled fuel oil injection four stroke gasoline engine
DE102006010244B3 (en) * 2006-03-02 2007-09-06 Benteler Automobiltechnik Gmbh Fuel distribution, for an internal combustion motor, has an injection molded plastics shrouding at the junction between the distribution tube and branch connections to the injectors with sleeve sections around them
JP2007247558A (en) * 2006-03-16 2007-09-27 Toyoda Gosei Co Ltd Heat insulating cover
JP2013072430A (en) * 2011-09-29 2013-04-22 Denso Corp Mounting structure of fuel distribution pipe

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