JP2006077784A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2006077784A5 JP2006077784A5 JP2005356291A JP2005356291A JP2006077784A5 JP 2006077784 A5 JP2006077784 A5 JP 2006077784A5 JP 2005356291 A JP2005356291 A JP 2005356291A JP 2005356291 A JP2005356291 A JP 2005356291A JP 2006077784 A5 JP2006077784 A5 JP 2006077784A5
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- fine foreign
- foreign matter
- pressure fuel
- injection 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.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 claims description 47
- 238000002347 injection Methods 0.000 claims description 46
- 239000007924 injection Substances 0.000 claims description 46
- 239000000243 solution Substances 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- MRVATQWXALDVFU-UHFFFAOYSA-N hydrogen peroxide;oxalic acid Chemical compound OO.OC(=O)C(O)=O MRVATQWXALDVFU-UHFFFAOYSA-N 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 2
- -1 alkalis Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 description 14
- 230000003749 cleanliness Effects 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Description
本発明は、外径４．５〜２０．０ｍｍ程度で、肉厚１．５〜８．０ｍｍ程度の厚肉細径の高圧燃料噴射管およびその製造方法に係り、特にディーゼル内燃機関に使用される高圧燃料噴射管の製造方法に関するものである。 The present invention relates to a high-pressure fuel injection pipe having an outer diameter of about 4.5 to 20.0 mm and a wall thickness of about 1.5 to 8.0 mm and a method for manufacturing the same, and particularly to a diesel internal combustion engine. The present invention relates to a method for manufacturing a high-pressure fuel injection pipe.
なお、本明細書において「高圧燃料噴射管」とは、接続端部に頭部成形を施す前の高圧燃料噴射管用の管材のみならず、前記頭部成形を施したり、あるいはその後曲げ加工を施したものや、さらには予め燃料を高圧ポンプにより加圧してこれを蓄圧し機械的又は電気的に制御される開閉弁で燃焼室へ供給するために前記蓄圧室として働く、いわゆる「コモンレール」などを含めた総称を表すものである。 In the present specification, the term “high pressure fuel injection pipe” means not only the pipe material for the high pressure fuel injection pipe before the head molding at the connection end but also the head molding or the subsequent bending process. Or a so-called “common rail” that serves as the pressure accumulating chamber in order to pressurize the fuel with a high-pressure pump in advance and accumulate it and supply it to the combustion chamber with a mechanically or electrically controlled on-off valve. It represents the generic name including.
ディーゼルエンジン用燃料噴射管に利用される高圧燃料噴射管は、近年ＮＯｘの低減や黒煙軽減対策のために、燃料の高圧化の傾向が大きくなり、噴射時間１〜２ｍｓｅｃ、最大流速５０ｍ／ｓｅｃ、内圧６０〜１５００バール（ピーク値）の高圧で燃料を噴射することが要求され始めている。
このような市場要求の変化に伴って、空中を浮遊したり、外部より侵入したりする金属粉などの微小異物が高圧燃料噴射管の内面に付着すると、噴射ノズルの詰まりが発生し、これによってディーゼルエンジンの不調や燃料ポンプの破損などの可能性が生ずるため、これを防止することを目的として高圧燃料噴射管の内面清浄度をいかにして高めるかが大きな課題とされている。
In recent years, high-pressure fuel injection pipes used for diesel engine fuel injection pipes have a tendency to increase the pressure of fuel in order to reduce NOx and reduce black smoke, and have an injection time of 1 to 2 msec and a maximum flow velocity of 50 m / sec. It has begun to be required to inject fuel at an internal pressure of 60 to 1500 bar (peak value).
Along with such changes in market requirements, when foreign objects such as metal powder floating in the air or entering from the outside adhere to the inner surface of the high pressure fuel injection pipe, the injection nozzle is clogged. Since there is a possibility of malfunction of the diesel engine or damage of the fuel pump, how to increase the cleanliness of the inner surface of the high-pressure fuel injection pipe for the purpose of preventing this is a major issue.
従来は、高圧燃料噴射管の製造工程において該噴射管の内周面に侵入、付着する微小異物を、単に高圧エアーをブローして洗浄していたが、十分な洗浄が行われず、結果として噴射ノズルの詰まりが発生し、これによってディーゼルエンジンの不調や燃料ポンプの破損などが発生する可能性があり、より一層の改良が要望されているのが現状である。 Conventionally, in the manufacturing process of a high-pressure fuel injection pipe, fine foreign matter that has entered and adhered to the inner peripheral surface of the injection pipe has been cleaned by simply blowing high-pressure air. However, sufficient cleaning is not performed, resulting in injection. There is a possibility that nozzle clogging may occur, which may cause malfunction of the diesel engine and damage to the fuel pump, and further improvements are demanded.
本発明は前記したようなこの種の高圧燃料噴射管の製造工程の現状に鑑みなされたものであり、その目的は高圧燃料噴射管の内面清浄度を高めて種々の微小異物を内周面からほぼ完全に除去し、したがって噴射ノズルの詰まりの発生を防止し、これによってディーゼルエンジンの不調や燃料ポンプの破損などを予防することが可能な高圧燃料噴射管の製造方法を提供することにある。 The present invention has been made in view of the current state of the manufacturing process of this kind of high-pressure fuel injection pipe as described above, and its purpose is to increase the cleanliness of the inner surface of the high-pressure fuel injection pipe to remove various fine foreign substances from the inner peripheral surface. An object of the present invention is to provide a method of manufacturing a high-pressure fuel injection pipe that can be removed almost completely, and thus prevent the occurrence of clogging of the injection nozzle, thereby preventing the malfunction of the diesel engine and the breakage of the fuel pump.
前記目的を達成するため、本発明は、内燃機関に使用する細径厚肉の高圧燃料噴射管の製造方法において、伸管工程と前記伸管工程に続く熱処理工程を複数回繰返して実施する工程を含み、かつ、最終回の伸管工程とそれに続く熱処理工程を実施した後に、外部より侵入して管の内周面に付着している微小異物を清浄するために、前記微小異物を溶解する酸、アルカリ、有機溶剤の群から選ばれる異なる種類の微小異物溶解液を管内に通液し、前記溶解液の溶解作用に基づいて前記微小異物を溶解清浄する工程を実施することを特徴とする高圧燃料噴射管の製造方法を提供するものである。
本発明において、前記異なる種類の微小異物溶解液を管内への通液は、１回通液よりも複数回繰り返すことが好ましいものである。
In order to achieve the above object, the present invention provides a method of repeatedly performing a tube drawing step and a heat treatment step following the tube drawing step in a method for producing a small-diameter, thick-walled high-pressure fuel injection pipe used for an internal combustion engine. In order to clean the fine foreign matter that enters from the outside and adheres to the inner peripheral surface of the pipe after the final tube drawing step and the subsequent heat treatment step are performed It is characterized in that a step of dissolving different kinds of fine foreign substances selected from the group of acids, alkalis and organic solvents through a tube and dissolving and cleaning the fine foreign substances based on the dissolving action of the dissolution liquid is performed. A method for manufacturing a high-pressure fuel injection pipe is provided.
In the present invention, it is preferable that the different kinds of fine foreign substance solution are repeatedly passed through the tube several times rather than once.
以上述べた通り本発明によれば、種々の微小異物を高圧燃料噴射管の内周面からほぼ完全に除去し、したがって噴射ノズルの詰まりの発生を防止し、これによってディーゼルエンジンの不調や燃料ポンプの破損などを予防することが可能となる高圧燃料噴射管の製造方法を提供することができる。 As described above, according to the present invention, various fine foreign substances are almost completely removed from the inner peripheral surface of the high-pressure fuel injection pipe, thus preventing the occurrence of clogging of the injection nozzle. It is possible to provide a method for manufacturing a high-pressure fuel injection pipe that can prevent damage to the fuel.
本発明では通常行われているように伸管加工と熱処理加工を４〜６回繰り返して、高圧燃料噴射管を製造する。そして、本発明は、最終伸管工程の後、微小異物溶解液によって内周面を洗浄する点に最大の特徴点がある。
その際に使用される微小異物溶解液としては、鉄系の微小異物に対しては酸の系統のリン酸系、シュウ酸−過酸化水素系などのものが用いられるが、具体的には三菱ガス化学（株）製の「ＣＰＬ−２００」などが挙げられ、液温１０〜４０℃で使用される。
また、アルミニウム系の微小異物に対しては苛性ソーダなどのアルカリ系の溶解液が使用される。さらに、有機系の微小異物に対しては前記酸系の溶解液が有効である。更にまた、油脂系の微小異物に対してはメタノール、ブタノールなどのアルコール類、塩化メチレン、ノルマルヘキサンなどの有機溶剤が使用される。
In the present invention, the high-pressure fuel injection pipe is manufactured by repeating the tube drawing process and the heat treatment process 4 to 6 times as is normally performed. And this invention has the biggest characteristic point in the point which wash | cleans an internal peripheral surface with a micro foreign material solution after a final tube drawing process .
The foreign particles solution used during its iron-based phosphate strains of acid relative to the minute foreign matter, oxalic acid - but is used as such as hydrogen peroxide, specifically “CPL-200” manufactured by Mitsubishi Gas Chemical Co., Ltd., and the like, are used at a liquid temperature of 10 to 40 ° C.
Further , an alkaline solution such as caustic soda is used for aluminum-based fine foreign matters . Furthermore , the acid-based solution is effective against organic fine foreign substances . Furthermore, for the fine foreign matter of the fat-based alcohols such as methanol, butanol, methylene chloride, organic solvents such as normal hexane is Ru is used.
本発明においては、必要に応じ、前記酸、アルカリ或いは有機溶剤系の微小異物溶解液は、同種のものであれば適宜混合して使用することもでき、或いは同種の液、例えば初めにリン酸系の溶解液で清浄し、後にシュウ酸−過酸化水素系の溶解液で清浄することもできる。
また、本発明においては、微小異物溶解液のうち異なる種類の液を複数回繰り返して使用することもできる。例えば、対象となる微小異物によって、初めに酸の系統の溶解液を用いて清浄し、次ぎにアルカリ系の溶解液を用いて清浄することもできる。
In the present invention, if necessary, the acid, alkali or organic solvent- based fine foreign substance solution can be used by appropriately mixing the same kind , or the same kind of liquid, for example, phosphoric acid first. It can also be cleaned with a solution of the system and later cleaned with a solution of the oxalic acid-hydrogen peroxide system.
Further, in the present invention, different kinds of liquids out of the fine foreign substance solution can be used repeatedly a plurality of times. For example, depending on the minute foreign matter to be processed, it can be cleaned first using an acid-based solution, and then using an alkaline solution.
このように微小異物溶解液によって内周面を洗浄された燃料噴射管は、その後再度酸洗し、次いでクールミン化学工業（株）製の「クールミンＯ剤」（商品名）などを用いて中和し、乾燥して最終製品としての燃料噴射管となる。 The fuel injection pipe whose inner peripheral surface has been washed with the fine foreign substance solution is then pickled again, and then neutralized using “Coolmin O Agent” (trade name) manufactured by Coolmin Chemical Industries, Ltd. Then, it is dried to become a fuel injection pipe as a final product .
なお、本発明は、原出願(特願平８−１７７０７４)の分割出願に係る発明である。The present invention is an invention relating to a divisional application of the original application (Japanese Patent Application No. 8-177074).
前記原出願は、審査過程で本出願人に係る特開平５-１５４５３６号公報を引用されたが、それとの明確化を図るクレーム補正により特許査定されている。 The above-mentioned original application was cited in Japanese Patent Application Laid-Open No. 5-154536 related to the present applicant in the examination process, but has been granted a patent by amending a claim to clarify it.
前記原出願のクレーム構成は、前記微小異物溶解液が１種又は同種の複数のもので構成されることに関係している。これに対して、本発明は、前記微小異物溶解液が異種のもので構成されることに関係している。 The claim structure of the original application relates to the minute foreign substance solution being composed of one kind or plural kinds of the same kind. On the other hand, the present invention relates to the fact that the fine foreign matter solution is composed of different kinds.
以下、本発明を実施例・比較例により詳しく説明するが、原出願の補正クレームに関係する実施態様を、参考のために「参考例」として示しておく。 Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. Embodiments related to the amended claims of the original application will be shown as “reference examples” for reference.
［参考例１］[Reference Example 1]
４回の伸管加工と熱処理加工を施して得られたＪＩＳ Ｇ３３４５５ ＳＴＳ ３７０からなる外径が５．０ｍｍ、内径が２．０ｍｍ、肉厚１．５ｍｍの燃料噴射管６本を常法に従い脱脂・洗浄し酸洗した後、三菱ガス化学（株）製「ＣＰＬ−２００」（商品名）からなる微小異物溶解液を用いて管内を通過させて、その内周面に常温で２分間洗浄を施した。その後、１０容量％濃度の塩酸を用いて管内を常温で１５秒間通過させて酸洗し、中和、乾燥した。 Degreasing six fuel injection pipes of JIS G33455 STS 370, obtained by four times of pipe drawing and heat treatment, with an outer diameter of 5.0 mm, an inner diameter of 2.0 mm, and a wall thickness of 1.5 mm according to a conventional method.・ After washing and pickling, the inside of the tube is passed through a pipe using a minute foreign substance solution made of “CPL-200” (trade name) manufactured by Mitsubishi Gas Chemical Co., Ltd. gave. Thereafter, the tube was passed through the tube for 15 seconds at room temperature with hydrochloric acid having a concentration of 10% by volume, pickled, neutralized and dried.
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、鉄製微小異物は殆ど測定されなかった。
［参考例２］
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection tube obtained in this manner, very little iron foreign matter was measured.
[Reference Example 2]
参考例１と同様の寸法でＪＩＳ ＳＴＳ ４１０からなる燃料噴射管６本を、実施例１と同様に脱脂、洗浄し酸洗した。次いでリン酸（７０容量％）−硫酸（２０容量％）−クロム酸（５００ｇ／リットルのクロム酸水溶液を１０容量％）からなる微小異物溶解液を用いて、管内を温度７０℃で５分間洗浄を施した。次いで参考例１同様に管内を酸洗し、中和、乾燥した。 Six fuel injection tubes made of JIS STS 410 having the same dimensions as in Reference Example 1 were degreased, washed and pickled in the same manner as in Example 1. Next, the inside of the tube was washed at a temperature of 70 ° C. for 5 minutes using a fine foreign substance solution composed of phosphoric acid (70% by volume) -sulfuric acid (20% by volume) -chromic acid (10% by volume of 500 g / liter chromic acid aqueous solution). Was given. Next, the tube was pickled, neutralized and dried as in Reference Example 1.
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、有機物製微小異物は殆ど測定されなかった。
［参考例３］
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection tube obtained in this way, organic fine foreign matters were hardly measured.
[Reference Example 3]
参考例１と同様の寸法でＪＩＳ ＳＴＳ ４８０からなる燃料噴射管６本を、１０容量％濃度のＮａＯＨからなる微小異物溶解液を用いて、管内を常温で５分間通過させて洗浄を施した。次いで管内を水洗し、乾燥した。
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、アルミニウム製微小異物は殆ど測定されなかった。
［参考例４］ Six fuel injection tubes made of JIS STS 480 having the same dimensions as in Reference Example 1 were washed by passing the inside of the tube for 5 minutes at room temperature using a 10% by volume NaOH solution. Next, the inside of the tube was washed with water and dried.
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection tube obtained in this way, almost no aluminum fine foreign matter was measured.
[Reference Example 4]
参考例１と同様の寸法でＪＩＳ ＳＴＳ ３７０からなる燃料噴射管６本を、ノルマルヘキサン（９６容量％）とブタノール（９９容量％）の混合液からなる微小異物溶解液を用いて、管内を常温で１０分間通過させて洗浄を施した後、管内を乾燥した。
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、油脂製微小異物は殆ど測定されなかった。
Six fuel injection pipes made of JIS STS 370 with the same dimensions as in Reference Example 1 were placed inside the pipe at room temperature using a fine foreign substance solution made of a mixture of normal hexane (96 vol%) and butanol (99 vol%). The tube was dried after passing through for 10 minutes.
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection pipe obtained in this way, almost no fine oily foreign matter was measured.
参考例１と同様の寸法と材質の燃料噴射管６本を、参考例１と同様に脱脂、洗浄し酸洗した。次いで管内に参考例１と同様な清浄処理を施した後、１０容量％濃度の塩酸を用いて管内を常温で１５秒間通過させて酸洗し、中和した。
その後、管内にさらに参考例２と同様の清浄処理、酸洗、中和、乾燥の各処理を施した。
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、鉄製微小異物および有機物製微小異物は殆ど測定されなかった。
Similar dimensions and the fuel injection pipe 6 present the material in Reference Example 1, likewise defatted as in Reference Example 1, and washed pickled. Next, the tube was subjected to the same cleaning treatment as in Reference Example 1, and then the tube was passed through the tube for 15 seconds at room temperature with hydrochloric acid having a concentration of 10 vol.
Thereafter, the same cleaning treatment, pickling, neutralization and drying as in Reference Example 2 were further performed in the tube.
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection tube obtained in this manner, very little iron foreign matter and organic fine foreign matter were measured.
参考例１と同様の寸法と材質の燃料噴射管６本を、参考例１と同様に脱脂、洗浄し酸洗した。次いで管内に参考例１と同様な清浄処理を施した後、１０容量％濃度の塩酸を用いて管内を常温で１５秒間通過させて酸洗し、中和した。
その後、管内にさらに参考例３と同様の清浄処理、水洗、乾燥の各処理を施した。
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、鉄製微小異物およびアルミニウム製微小異物は殆ど測定されなかった。
［比較例１］
Similar dimensions and the fuel injection pipe 6 present the material in Reference Example 1, likewise defatted as in Reference Example 1, and washed pickled. Next, the tube was subjected to the same cleaning treatment as in Reference Example 1, and then the tube was passed through the tube for 15 seconds at room temperature with hydrochloric acid having a concentration of 10 vol.
Thereafter, the same cleaning treatment, washing with water and drying as in Reference Example 3 were further performed in the tube.
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection tube obtained in this way, few iron foreign matters and aluminum minute foreign matters were measured.
[Comparative Example 1]
参考例１と同様の寸法と材質の燃料噴射管６本を、参考例１と同様に常法に従い管内を脱脂、洗浄し、酸洗した後、内周面をエアーブローした。 Similar dimensions and the fuel injection pipe 6 present the material in Reference Example 1, degreased tube in a conventional manner in the same manner as in Reference Example 1, washed, after pickling, the inner peripheral surface was air blow.
このようにして得られた高圧燃料噴射管の内周面の清浄度を測定した結果、かなりの大きさの鉄製微小異物が測定されるとともに、多数の小さなアルミニウム製微小異物も測定された。さらに綿繊維状の有機物製微小異物もかなりの本数測定された。
前記したことから明らかのように、高品質の高圧燃料噴射管を製造するためには、常法による脱脂、酸洗では全く不十分であり、本発明による管の内周面に付着している微小異物を溶解清浄するための「異なる種々の微小異物溶解液」による処理工程が不可欠であることが判る。
As a result of measuring the cleanliness of the inner peripheral surface of the high-pressure fuel injection pipe thus obtained, a considerable amount of fine iron foreign matter was measured, and a large number of small aluminum fine foreign matters were also measured. In addition, a considerable number of fine organic particles made of cotton fibers were also measured.
As is apparent from the above, degreasing and pickling by conventional methods are not sufficient for producing a high-quality high-pressure fuel injection pipe, and are attached to the inner peripheral surface of the pipe according to the present invention. It can be seen that a treatment step using “different various fine foreign matter solution” for dissolving and cleaning the fine foreign matters is indispensable.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005356291A JP2006077784A (en) | 2005-12-09 | 2005-12-09 | Manufacturing method for high-pressure fuel injection pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005356291A JP2006077784A (en) | 2005-12-09 | 2005-12-09 | Manufacturing method for high-pressure fuel injection pipe |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17707496A Division JP3787898B2 (en) | 1996-06-17 | 1996-06-17 | Manufacturing method of high-pressure fuel injection pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006077784A JP2006077784A (en) | 2006-03-23 |
| JP2006077784A5 true JP2006077784A5 (en) | 2006-11-30 |
Family
ID=36157416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005356291A Withdrawn JP2006077784A (en) | 2005-12-09 | 2005-12-09 | Manufacturing method for high-pressure fuel injection pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2006077784A (en) |
-
2005
- 2005-12-09 JP JP2005356291A patent/JP2006077784A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7531048B2 (en) | On-wing combustor cleaning using direct insertion nozzle, wash agent, and procedure | |
| CN108798800A (en) | The method for cleaning the component in turbogenerator | |
| JP3787898B2 (en) | Manufacturing method of high-pressure fuel injection pipe | |
| CN104148422B (en) | Cold rolled tube inner surface deoiling method | |
| JP2006077784A5 (en) | ||
| CN101328587A (en) | Hydraulic tubing three-in-one acid cleaning process | |
| CN1209502C (en) | Steel pipe acid pickling process | |
| US9533333B2 (en) | Cleaning method and cleaning apparatus | |
| JP2006077784A (en) | Manufacturing method for high-pressure fuel injection pipe | |
| JPH07301497A (en) | Cleaning method for tube of heat exchanger | |
| US8354146B2 (en) | Methods for repairing gas turbine engine components | |
| KR102532527B1 (en) | Method for descaling of steel material | |
| US20040069324A1 (en) | Apparatus and method for cleaning airfoil internal cavities | |
| KR20060050088A (en) | Method of cleaning a drum substrate of aluminum for an electrophotographic photoconductor | |
| US7559993B1 (en) | Process for decoating a washcoat catalyst substrate | |
| JP2002263600A (en) | Descaling device and piping washing method using the same | |
| CN113649598A (en) | SLM (selective laser melting) -based surface cleaning treatment method for formed metal and alloy sample thereof | |
| CN112831793A (en) | Cleaning method of gas spray header | |
| US20050127039A1 (en) | Process for removing adherent oxide particles from an aluminized surface | |
| CN101215715A (en) | Magnesium alloy pickling activate fluids | |
| CN108118352A (en) | A kind of method for removing K424 nozzle piece surface stubbornness pollutants | |
| CN105798024B (en) | The normal temperature cleaning method of heavy duty diesel engine pulse water-cooling exhaust pipe | |
| JP3798120B2 (en) | Test method for cleanliness of inner surface of fuel injection system parts | |
| CN115029697B (en) | Acid etching liquid and application thereof | |
| JP2011168854A (en) | Method for forming rust preventive film on metallic member |