JPS63297764A - Manufacture of fuel feeding pipe in fuel injector - Google Patents
Manufacture of fuel feeding pipe in fuel injectorInfo
- Publication number
- JPS63297764A JPS63297764A JP62133736A JP13373687A JPS63297764A JP S63297764 A JPS63297764 A JP S63297764A JP 62133736 A JP62133736 A JP 62133736A JP 13373687 A JP13373687 A JP 13373687A JP S63297764 A JPS63297764 A JP S63297764A
- Authority
- JP
- Japan
- Prior art keywords
- fuel supply
- fuel feeding
- fuel
- feeding pipe
- supply 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は内燃機関へ供給される燃料量を制御する燃料供
給装置に関し、特に高圧燃料ポンプにて加圧された高圧
燃料を、内部に燃料供給路とこの燃料供給路に連結され
たインジェクターを有する燃料供給管を介して機関へ燃
料を供給した燃料噴射装置における前記燃料供給管の製
造方法に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a fuel supply device that controls the amount of fuel supplied to an internal combustion engine, and particularly relates to a fuel supply device that controls the amount of fuel supplied to an internal combustion engine. The present invention relates to a method of manufacturing a fuel supply pipe in a fuel injection device that supplies fuel to an engine through a fuel supply pipe having a supply path and an injector connected to the fuel supply path.
かかる燃料供給管の製造においては従来以下の如き方法
が一般的である。Conventionally, the following methods are generally used to manufacture such fuel supply pipes.
（１）燃料供給管自体を引抜き成形した後に燃料供給路
等の所望通路を加工する方法。(1) A method in which the fuel supply pipe itself is pultruded and then a desired passage such as a fuel supply channel is formed.
（２）鉄パイプと挽物部品とを熔接し、次いでメッキ処
理をする方法。(2) A method in which iron pipes and turned parts are welded and then plated.
（３）低圧鋳造にて燃料供給管を成形し、次いで所望の
通路、孔を加工する方法。(3) A method in which the fuel supply pipe is formed by low-pressure casting, and then the desired passages and holes are processed.
かかる従来の燃料供給管の製造方法によると各製造方法
には次の欠点を有する。Each of the conventional fuel supply pipe manufacturing methods has the following drawbacks.
前記第１の方法によると；
■引抜き加工による為に引抜き方向には同一断面形状で
しか抜くことができないもので、これによると駄肉が多
く付き、製品を軽量にできずまた材料費のアップにつな
がる。According to the first method; ■Because it is a drawing process, it can only be drawn with the same cross-sectional shape in the drawing direction, and this results in a lot of waste, making it impossible to make the product lightweight, and increasing material costs. Leads to.
■管自体の材料強度が低く、機械的強度、特にネジ部の
ネジ上りが問題である。■The material strength of the pipe itself is low, and mechanical strength, especially the screw threading of the threaded portion, is a problem.
第２の方法によると：
■溶接部が多く気密洩れの確認工程に多大な工数を要す
る□。According to the second method: ■There are many welded parts, and the process of checking for airtight leaks requires a lot of man-hours□.
■部品点数が多く、最終組立時に集積誤差が生じ易い。■There are a large number of parts, and assembly errors are likely to occur during final assembly.
■パイプ内のメッキ状態の確認が困難であり、錆が心配
である。■It is difficult to check the plating condition inside the pipe, and there are concerns about rust.
■燃料供給管内に部品の溶接接合による突起部が生じ易
く運転時において燃料中のエヤーロックの解消が困難で
ある。■Protrusions are likely to form in the fuel supply pipe due to welding of parts, making it difficult to eliminate air locks in the fuel during operation.
第３の方法によると；
■低圧にて鋳造するが故に、外観形状が不安定となり、
最終組付は状態において、他の部位との干渉が生じる恐
れが有り、それら干渉のない寸法精度管理が必要となる
。According to the third method; ■Because it is cast at low pressure, the external shape becomes unstable;
During final assembly, there is a risk of interference with other parts, and dimensional accuracy control to prevent such interference is required.
〔問題点を解決する為の手段９作用〕
本発明になる燃料供給管の製造方法は前記不具合を解決
した燃料供給管の製造方法を得ることを目的として、前
記目的達成の為に、燃料供給管の長子軸心線に沿って該
燃料供給管内に燃料供給路を金型中子・で鋳抜き形成す
るとともに、燃料供給管の燃料供給路の長手軸心線方向
ｘ−Ｘの一端部近傍に成形時におけるゲートを配置し、
高圧鋳造したものである。[Means 9 and Effects for Solving the Problems] The method of manufacturing a fuel supply pipe according to the present invention aims to obtain a method of manufacturing a fuel supply pipe that solves the above-mentioned problems, and in order to achieve the above-mentioned object, A fuel supply passage is formed in the fuel supply pipe by casting with a mold core along the longitudinal axis of the pipe, and near one end of the fuel supply pipe in the longitudinal axis direction x-X. Place the gate during molding,
It is high-pressure cast.
（実施例〕
以下２本発明になる燃料噴射装置における燃料供給管の
製造方法の一実施例を図によって説明する。(Example) Hereinafter, an example of a method for manufacturing a fuel supply pipe in a fuel injection device according to the present invention will be described with reference to the drawings.
１は燃料供給管であって、内部をその長子軸心線に沿っ
て燃料供給路２が貫通し、その燃料供給路２の一端に高
圧燃料ポンプ（図示せず）よりの高圧燃料の供給奄受け
る燃料ジヨイント３が取りつけられ、一方、その燃料供
給路２の他端には開口する燃料供給路２の他端を閉塞す
る閉塞プラグ４が取りつけられる。そして前記燃料供給
路２には図においてその下方よりインジェクター５を嵌
合取着するためのインジェクター取付は孔６が穿設され
る。Reference numeral 1 denotes a fuel supply pipe, through which a fuel supply passage 2 passes through the interior along its longitudinal axis, and a high-pressure fuel supply pipe from a high-pressure fuel pump (not shown) is connected to one end of the fuel supply passage 2. A fuel joint 3 is attached to receive the fuel, while a closing plug 4 is attached to the other end of the fuel supply passage 2 to close the other end of the fuel supply passage 2 which is open. The fuel supply path 2 is provided with an injector mounting hole 6 for fitting and mounting an injector 5 from below in the figure.
以上の構造は公知のものであるが、本発明は燃料供給管
２を次の如く製造することを特徴とする。即ち、燃料供
給管ｌの製造において、燃料供給管１の内部に形成され
る燃料供給路２を金型中子で鋳抜き形成したのみで燃料
供給路２を構成するもので該供給路の内面は鋳抜き面を
そのまま使用し、加工を加えないものである。また、成
形時における金型のゲートを燃料供給管ｌの燃料供給路
２の長手軸心線方向ｘ−Ｘの一端部近傍ＡまたはＢに配
置するものである。Although the above structure is well known, the present invention is characterized in that the fuel supply pipe 2 is manufactured as follows. That is, in manufacturing the fuel supply pipe 1, the fuel supply passage 2 is formed by simply casting out the fuel supply passage 2 formed inside the fuel supply pipe 1 using a mold core, and the inner surface of the supply passage The cast surface is used as is and no machining is required. Further, the gate of the mold during molding is arranged near one end A or B of the fuel supply pipe 1 in the longitudinal axis direction x-X of the fuel supply passage 2.
この一端部近傍は燃料供給管ｌの端面でも、端面に近い
燃料供給管１の側面でも良く、またゲートとしてはリン
グ状ゲート、あるいはポイントゲートの何れでもよいも
のである。尚、インジェクター取付は孔６も同時に鋳抜
き形成される。The vicinity of this one end may be the end face of the fuel supply pipe 1 or the side surface of the fuel supply pipe 1 near the end face, and the gate may be either a ring-shaped gate or a point gate. Note that the hole 6 for mounting the injector is also formed by casting at the same time.
従って、烏料供給管１の成形時においては、燃料供給管
ｌの端部近傍に配置したゲートより高圧の溶融金属が金
型内に射出され、所望の形状の燃料供給管１が成形され
るもので、特に燃料供給路２は中子にて鋳抜き成形され
、そのままの鋳抜き面が使用される。Therefore, when molding the porosity supply pipe 1, high-pressure molten metal is injected into the mold from the gate placed near the end of the fuel supply pipe 1, and the fuel supply pipe 1 in the desired shape is molded. In particular, the fuel supply passage 2 is formed by casting with a core, and the cast surface is used as it is.
以上の如き、本発明になる燃料噴射装置における燃料供
給管の製造方法によると、次の効果を奏し得るものであ
る。As described above, according to the method of manufacturing a fuel supply pipe in a fuel injection device according to the present invention, the following effects can be achieved.
■高圧鋳造にて成形したことによると、Ｏ燃料供給管を
最少肉厚で成形でき軽量化できる。■By using high-pressure casting, the O fuel supply pipe can be formed with the minimum wall thickness, making it lighter in weight.
０駄肉がなく無駄な材料の使用が皆無となり経済的であ
る。It is economical as there is no wasteful meat and no wasted materials.
０爆接部が無く、気密、耐圧の保持が容易である。There is no zero explosion contact, making it easy to maintain airtightness and pressure resistance.
Ｏ他の構成部品を接合する必要がないので部品点数を減
少でき経済的であり、更に燃料通路に突起がなく通路形
状を円滑にできるので燃料流れがスムースでエヤーロッ
クが生じない。Since there is no need to join other components, the number of parts can be reduced, which is economical. Furthermore, since there are no protrusions in the fuel passage and the shape of the passage can be made smooth, the fuel flow is smooth and no air lock occurs.
Ｏメッキ処理が不要となり（アルミニウム合金、亜鉛合
金の使用によって）特に燃料通路内の錆の発生を抑止し
得るものである。This eliminates the need for O plating treatment (by using aluminum alloy and zinc alloy), and can particularly prevent rust from forming within the fuel passage.
Ｏ外観形状を精度良く抑えることができ最終組立て状態
において他の部品との干渉が皆無となる。O The external shape can be suppressed with high precision, and there is no interference with other parts in the final assembled state.
■燃料供給管の端部近傍に金型ゲートを配置したことに
よると、
Ｏ溶融金属中に含まれる空気は燃料供給管の長手軸心線
方向に一挙にぬけるので従来の高圧鋳造方法による含有
ガス量、２０〜３０ （ｃｃ／１００ｇ）に対し１０
（ｃｃ／１００ｇ）以下と低下させることができ、材料
密度を大きく向上できたもので、巣の発生を抑止して気
密性の保持ができたものであり、更には溶融金属の湯ザ
カイがなくなり燃料供給管の機械的強度を向上できたも
のである。■By arranging the mold gate near the end of the fuel supply pipe, the air contained in the molten metal escapes all at once in the longitudinal axis direction of the fuel supply pipe. Amount, 10 for 20-30 (cc/100g)
(cc/100g) or less, significantly improving the material density, suppressing the formation of cavities and maintaining airtightness, and further eliminating the possibility of molten metal leaking. This improves the mechanical strength of the fuel supply pipe.
■燃料供給路を成形時の鋳抜き面そのままで使用したこ
とによると、高圧燃料が流れる燃料供給路の気密性の維
持向上を図ることができたものである。(2) By using the fuel supply channel as it was on the cast surface during molding, it was possible to maintain and improve the airtightness of the fuel supply channel through which high-pressure fuel flows.
図は本発明になる燃料噴射装置における燃料供給管の製
造方法を示すもので、第１図はその横断面図、第２図は
第１図の■−■線での縦断面図である。
１９１．燃料供給管、 ２００．燃料供給路。
３１．、燃料ジヨイント。
手続ネ市ｆｆＥ書
昭和６２年７月７日The figures show a method of manufacturing a fuel supply pipe in a fuel injection device according to the present invention, in which FIG. 1 is a cross-sectional view thereof, and FIG. 2 is a vertical cross-sectional view taken along the line 1--2 in FIG. 191. fuel supply pipe, 200. Fuel supply route. 31. , fuel joint. Procedure Ne City FFE Book July 7, 1986
Claims (1)
給路を備え、該供給路に対応してインジエクターを配置
せる燃料供給管を介して機関へ燃料を供給する燃料噴射
装置において、 燃料供給管の長手軸心線に沿って該燃料供給管内に燃料
供給路を金型中子で鋳抜き形成するとともに、燃料供給
管の燃料供給路の長手軸心線方向Ｘ−Ｘの一端部近傍に
成形時におけるゲートを配置し、高圧鋳造してなる燃料
噴射装置における燃料供給管の製造方法。[Claims] Fuel that is pressurized by a high-pressure fuel pump is supplied to the engine through a fuel supply pipe that has a fuel supply path inside and has an injector arranged corresponding to the supply path. In the injection device, a fuel supply passage is formed in the fuel supply pipe by casting along the longitudinal axis of the fuel supply pipe using a mold core, and the fuel supply passage is cast in the longitudinal axis direction of the fuel supply pipe. A method of manufacturing a fuel supply pipe in a fuel injection device by placing a gate during molding near one end of the X and performing high-pressure casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133736A JPS63297764A (en) | 1987-05-29 | 1987-05-29 | Manufacture of fuel feeding pipe in fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133736A JPS63297764A (en) | 1987-05-29 | 1987-05-29 | Manufacture of fuel feeding pipe in fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63297764A true JPS63297764A (en) | 1988-12-05 |
Family
ID=15111713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62133736A Pending JPS63297764A (en) | 1987-05-29 | 1987-05-29 | Manufacture of fuel feeding pipe in fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63297764A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5648266A (en) * | 1979-09-12 | 1981-05-01 | Carrier Drysys Ltd | Treating device for air for painting chamber |
-
1987
- 1987-05-29 JP JP62133736A patent/JPS63297764A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5648266A (en) * | 1979-09-12 | 1981-05-01 | Carrier Drysys Ltd | Treating device for air for painting chamber |
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