TR201705918A3 - Fuel injector having hydrophobic coating - Google Patents

Fuel injector having hydrophobic coating Download PDF

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Publication number
TR201705918A3
TR201705918A3 TR2017/05918A TR201705918A TR201705918A3 TR 201705918 A3 TR201705918 A3 TR 201705918A3 TR 2017/05918 A TR2017/05918 A TR 2017/05918A TR 201705918 A TR201705918 A TR 201705918A TR 201705918 A3 TR201705918 A3 TR 201705918A3
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TR
Turkey
Prior art keywords
fuel injector
injector
injector according
fuel
overmolding
Prior art date
Application number
TR2017/05918A
Other languages
Turkish (tr)
Inventor
Kandemi̇r Duygu
Original Assignee
Bosch Sanayi Ve Tic A S
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 Bosch Sanayi Ve Tic A S filed Critical Bosch Sanayi Ve Tic A S
Priority to TR2017/05918A priority Critical patent/TR201705918A3/en
Priority to DE112018001467.3T priority patent/DE112018001467T5/en
Priority to PCT/EP2018/059986 priority patent/WO2018193013A1/en
Publication of TR201705918A3 publication Critical patent/TR201705918A3/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • 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
    • F02M63/00Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012Valves
    • F02M63/0031Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • 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
    • F02M2200/05Fuel-injection apparatus having means for preventing corrosion
    • 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
    • F02M2200/90Selection of particular materials
    • F02M2200/9038Coatings

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention relates to a fuel injector provided that at least one portion of said injector is covered with an overmolding material; wherein the overmolded portion is at least partly coated with a material having hydrophobic characteristics.

Description

Teknik Alani Mevcut bulus, bir içten yanmali motorun emme sistemine yakit iletimi için yeni bir yakit enjektörü ile ilgilidir. Mevcut bulus özellikle, enjektöre dogru akiskan göçünü önlemek üzere hidrofobik malzemeyle kaplanan bir yakit enjektörü ile ilgilidir. Technical Area The present invention provides a new fuel for fuel delivery to the intake system of an internal combustion engine. It's about the injector. The present invention is specifically designed to prevent fluid migration towards the injector. It relates to a fuel injector coated with hydrophobic material.

Bulusun Arka Plani Motora yakit iletimi için kullanilan yakit enjektörleri, uzun süreler boyunca yüksek basinçta ve genis sicaklik araliklarinda çalismaktadir. Enjektörüniç bilesenlerini sarmalamak ve böylece enjektörü çevreden korumak için, enjektörün yüzeyi üzerinde bir üst kalip parçasi bulunmaktadir. Örnegin, üst kaliplama islemi enjektörde korozyon korumasinin yani sira enjektör içerisindeki elektrikli bilesenlerin yalitimini da saglamaktadir. Background of the Invention Fuel injectors used to deliver fuel to the engine operate at high pressure and for long periods of time. It works in wide temperature ranges. Wrapping the inner components of the injector and thus an upper molding piece on the surface of the injector to protect the injector from the environment. are available. For example, overmolding provides corrosion protection to the injector as well as It also provides insulation of the electrical components inside the injector.

Yakit enjektörü ve üst kalipparçasi farkli malzemelerden üretilmektedir. Yüksek sicaklik ve/veya basinç kosullarinda, üst kalip parçasi ve enjektör arasindaki temas arayüzeyi boyunca bosluklar olusabilmektedir; bu durum söz konusu bosluklar boyunca enjektöre dogru akiskan göçüne yol açmaktadir. Bu nedenle, akiskan göçünün ortadan kaldirildigi yeni bir yakit enjektörüne ihtiyaç vardir. Fuel injector and upper mold part are produced from different materials. High temperature and/or pressure conditions, the contact interface between the upper mold part and the injector gaps may occur throughout; this is true to the injector along these gaps. leads to fluid migration. Therefore, a new generation of fluid migration is eliminated. A fuel injector is needed.

Bulusun Amaçlari Mevcut bulusun temel amaci, enjektöre dogru gerçeklesen akiskan göçünü önlemektir. Objectives of the Invention The main purpose of the present invention is to prevent fluid migration towards the injector.

Mevcut bulusun bir baska amaci, uzun ömürlü bir yakit enjektörü saglamaktir. Another object of the present invention is to provide a long life fuel injector.

Mevcut bulusun bir baska amaci, ortamdaki akiskanlara geçirmeyen ve yüksek sicaklik ve basinç kosullarinda dayanikli olan bir yakit enjektörü saglamaktir. Another object of the present invention is that it is impermeable to ambient fluids and at high temperature and to provide a fuel injector that can withstand pressure conditions.

Bulusun Özeti Yukarida bahsedilen amaçlara mevcut bulusa ait yakit enjektörü ile ulasilmaktadir. Summary of the Invention The above-mentioned objects are achieved by the fuel injector of the present invention.

Mevcut bulusun birinci yapilandirmasinda, söz konusu enjektörün en az bir bölümü bir üst kaliplama malzemesi ile kaplanir ve burada üst kalip parçasi hidrofobik özellikleri olan bir malzeme ile en azindan kismen kaplanmaktadir. In a first embodiment of the present invention, at least a portion of said injector is placed in an upper molding material, where the upper molding part is formed by a hydrophobic is at least partially covered by the material.

Bulusun olasi bir yapilandirmasinda, yakit enjektörü dizel yakit enjeksiyon sisteminde kullanilmaktadir. In one possible embodiment of the invention, the fuel injector is in the diesel fuel injection system. is used.

Bulusun olasi bir yapilandirmasinda, üst kaliplama malzemesi PA-66 veya PA-6T içermektedir. In one possible embodiment of the invention, the overmolding material comprises PA-66 or PA-6T.

Mevcut bulusun olasi bir yapilandirmasinda, üst kaliplama malzemesi PA-66'dir. In one possible embodiment of the present invention, the overmolding material is PA-66.

Mevcut bulusun olasi bir yapilandirmasinda, hidrofobik özellikleri olan malzeme bir süper hidrofobik malzemedir. In one possible embodiment of the present invention, the material with hydrophobic properties is a super It is a hydrophobic material.

Mevcut bulusun olasi bir yapilandirmasinda, süperhidrofobik malzeme manganez oksit polistirendir (MnOz/PS). In one possible embodiment of the present invention, the superhydrophobic material is manganese oxide. polystyrene (MnOz/PS).

Mevcut bulusun olasi bir yapilandirmasinda, süperhidrofobik malzeme çinko oksit polistiren (ZnO/PS) nano-kompozittir. In one possible embodiment of the present invention, the superhydrophobic material is zinc oxide polystyrene. (ZnO/PS) nano-composite.

Mevcut bulusun olasi bir yapilandirmasinda, süperhidrofobik malzeme çökelmis kalsiyum karbonattir. In one possible embodiment of the present invention, the superhydrophobic material is precipitated calcium. is carbonate.

Mevcut bulusun olasi bir yapilandirmasinda, süperhidrofobik malzeme karbon nano-tüp yapilaridir. In one possible embodiment of the present invention, the superhydrophobic material is carbon nanotube. are structures.

Mevcut bulusun olasi bir yapilandirmasinda, süperhidrofobik malzeme silis nano kaplamadir. In one possible embodiment of the present invention, the superhydrophobic material is silica nanocoating.

Mevcut bulusun olasi bir yapilandirmasinda, hidrofobik özellikleri olan malzemenin temas açisi 150°'den daha büyüktür. In one possible embodiment of the present invention, the contact angle of the material with hydrophobic properties is It is greater than 150°.

Bulusun Ayrintili Açiklamasi Yakit enjeksiyon sistemlerinde kullanilan yakit enjektörleri yanma odasina yakit dagitmaktadir. Geleneksel yakit enjektörlerinde, metal gövde ile baglantili bir üst kalip parçasi bulunur. Üst kaliplama enjektörün iç bilesenlerini çevreden korumaktadir. Enjektörün gövdesi metal yapidadirve uygun bir plastik malzeme ile enjektörde üst kaliplama yapilmaktadir. Üst kalip parçasinin ve enjektörün gövdesinin malzemeleri, fiziksel ve kimyasal özellikleri bakimindan birbirinden tamamen farklidir. Detailed Description of the Invention Fuel injectors used in fuel injection systems are fed into the combustion chamber. is distributing. In conventional fuel injectors, an upper molding piece is connected to the metal body. is found. Overmolding protects the internal components of the injector from the environment. body of injector It has a metal structure and over-molding is done on the injector with a suitable plastic material. Top materials, physical and chemical properties of the mold part and the body of the injector are completely different from each other.

Daha da önemlisi, isil genlesme degerleri metal ve plastiklerde farklidir. Plastiklerde isil genlesme, metallerdeki isil genlesmeye göre daha yüksektir. Plastik ve metal ayni miktarda genlesmediginden, çalisma sirasinda isiya maruz kaldiginda üst kalip parçasi ile enjektör arasindaki temas arayüzeyinde delikler olusabilmektedir. Bu delikler, enjektöre dogru akiskan göçüne neden oldugundan, söz konusu delik olusumu istenmemektedir. Yakit enjeksiyon sisteminin çalismasi sirasinda yüksek sicaklik kosullari sebebiyle enjektör ortaminda akiskanlar bulunabilmektedir. Akiskan, bu deliklerden yakit enjektörüne dogru ilerledikçe enjektörün deformasyonu hizlanmakta ve sistemin performansi kötülesmektedir. Diger taraftan, elektrik konektörü bir üst kalip parçasi ile çevrelenmektedir; elektrik konektörüne akiskan göçü, elektrik iletiminde ciddi problemlere neden olabilmektedir. Akiskan göçü ayrica yakit enjektörlerin kötü dayanikliligina ve ömrünün kisalmasina yol açmaktadir. More importantly, the thermal expansion values are different for metals and plastics. heat in plastics expansion is higher than thermal expansion in metals. Same amount of plastic and metal Since it does not expand, when exposed to heat during operation, the upper mold part and the injector Holes may occur at the contact interface between These holes flow towards the injector. This hole formation is undesirable as it causes migration. fuel injection in the injector environment due to high temperature conditions during the operation of the system. fluids are available. As the fluid travels through these holes towards the fuel injector. deformation of the injector accelerates and the performance of the system deteriorates. Other On the other hand, the electrical connector is surrounded by an upper die piece; to electrical connector Fluid migration can cause serious problems in electricity transmission. Fluid migration also It leads to poor durability and shortened life of fuel injectors.

Enjektöre dogru akiskan göçünden kaynaklanan sorunlar mevcut bulusa ait yakit enjektörü ile giderilmektedir. Problems arising from fluid migration towards the injector. Fuel injector of the present invention is resolved with

Mevcut bulusa göre, elektrik konektörü enjektörün kafa kisminda yer almaktadir. Bu konektör, enjektöre gelen akim ile motor sistemi arasinda baglanti kurmak için kullanilmaktadir. Elektrik konektörü uygun bir üst kaliplama malzemesi ile kaliplanmaktadir. According to the present invention, the electrical connector is located in the head of the injector. This connector, to connect the current to the injector and the engine system is used. The electrical connector is molded with a suitable overmolding material.

Sonrasinda, söz konusu üst kalip parçasi bir hidrofobik malzeme ile en azindan kismen kaplanmaktadir. Bu sekilde, üst kalip parçasinin yüzeyinde hidrofobik kaplama içeren yakit enjektörü saglanmaktadir. Hidrofobik kaplamanin su itme yetenegi vardir; böylece üzerinde akiskan birikimini önlemektedir. Bir diger deyisle, hidrofobik kaplama akiskan damlaciklari ve taban yüzeyi arasindaki adezyonu sinirlamaktadir. Üst kaliplama malzemesi plastik enjeksiyon kaliplama için uygun olan herhangi bir polimerik malzeme olabilmektedir; tercihen üst kaliplama malzemesi poliamid 6,6(PA66), poliamid 6T (PA6T) içermektedir. Üst kaliplama, enjeksiyon kaliplama prosesi ile olusturulmaktadir. The upper mold piece is then at least partially covered with a hydrophobic material. is covered. In this way, fuel containing hydrophobic coating on the surface of the upper die part injector is provided. The hydrophobic coating has the ability to repel water; so on prevents fluid accumulation. In other words, hydrophobic coating fluid droplets and It limits the adhesion between the base surface. The overmolding material is any polymeric material suitable for injection molding of plastics. material can be; preferably overmolding material polyamide 6,6(PA66), polyamide 6T (PA6T). Overmolding is created by the injection molding process.

Yakit enjektörünün metal bir destek gövdesi vardir; enjektörün gövdesi tercihen çelikten yapilmaktadir. The fuel injector has a metal support body; body of injector preferably made of steel is being done.

Yakit enjektörünün en az bir bölümü uygun bir üst kaliplama malzemesi ile çevrelenmektedir. At least a portion of the fuel injector is surrounded by a suitable overmolding material.

Yakit enjektörünün kafa kisminda yer alan elektrik konektöründe, PA 66 gibi bir polimerik malzeme ile üst kaliplama yapilmaktadir. Üst kaliplamali enjektörler, çesitli problemlere neden olabilmektedir. Örnegin, enjektör yakit enjeksiyon sisteminin çalismasi sirasinda yüksek sicakliga maruz kalmaktadir; enjektörün biçiminde deformasyon olmasi kaçinilmazdir. In the electrical connector located on the head of the fuel injector, a polymeric material such as PA 66 Top molding is done with the material. Over-molded injectors can cause various problems. may cause. For example, during operation of the injector fuel injection system exposed to high temperatures; It is inevitable to have deformation in the shape of the injector.

Sicaklik yükseldikçe, hem enjektörün metal kismi hem de üst kaliplama bölümünün plastik kismi esas uzunluklari ve isil genlesme degerleri ile orantili bir miktarda genlesmektedir. As the temperature rises, both the metal part of the injector and the plastic part of the upper molding part some of them expand at a proportional amount with their essential lengths and thermal expansion values.

Plastiklerde isil genlesmenin metallerden daha yüksek olmasi nedeniyle üst kaliplama kismi ve enjektör esit sekilde genlesmemektedir. Üst kalip parçasi enjektörün metal bölümünden çok daha fazla genlestiginden ötürü bunlarin arasindaki temas arayüzeyi baslangiçtaki seklinde kalmamaktadir. Plastikteki yüksek genlesme, yakit enjektörü ve üst kalipparçasi arasindaki temas ara yüzeyinde deliklere yol açmaktadir. Top molding part because thermal expansion is higher in plastics than in metals and the injector does not expand evenly. Upper mold piece from metal part of injector because it expands much more, the contact interface between them does not stay in shape. High expansion in plastic, fuel injector and upper mold part contact between them leads to holes in the interface.

Akiskan bu deliklerden kolayca geçerek yakit enjektörünün içerisine ulasabilmektedir. Akiskan göçü üst kalip parçasinin, hidrofobik özellikleri olan bir malzeme ile kaplanmasi yoluyla önlenmektedir. Üst kalip parçasi uygun bir hidrofobik malzeme ile en azindan kismen kaplanarak akiskan sizdirmaz bir enjektör saglanmaktadir. kaplama malzemesi süperhidrofobik bir malzeme olup, manganez oksit polistiren (MnOz/PS), çinko oksit polistiren (ZnO/PS) nano-kompozit, çökelmis kalsiyum karbonat, karbon nano-tüp yapilari veya silis nano-kaplama içermektedir. The fluid can easily pass through these holes and reach the inside of the fuel injector. Fluid by coating the upper mold part with a material with hydrophobic properties. is avoided. The upper molding part is at least partially covered with a suitable hydrophobic material. It is coated to provide a leak-proof injector. The coating material is a superhydrophobic material, manganese oxide polystyrene (MnOz/PS), zinc oxide polystyrene (ZnO/PS) nanocomposite, precipitated calcium carbonate, carbon nanotube structures or silica nano-coating.

Mevcut bulusa göre, hidrofobik kaplamanin 150°'den daha yüksek olan bir akiskan damlasi temas açisi vardir. “Temas açisi”, sivi-kati arayüzeyinin ve sivi-buhar arayüzeyinin kesismesi ile olusan bir açiyi tanimlamaktadir ve bir yüzeyin islanma davranisinin ölçüsü olarak kullanilmaktadir. According to the present invention, a fluid droplet higher than 150° of the hydrophobic coating contact angle. “Contact angle”, intersection of liquid-solid interface and liquid-vapor interface It defines an angle formed by and is a measure of the wetting behavior of a surface. is used.

Hidrofobik kaplama çözeltisi püskürtme, daldirma, firçalama ve akitmali kaplama dahil olmak üzere herhangi bir uygun yöntemle, üst kalip parçasinin yüzeyine uygulanabilmektedir. Hydrophobic coating solution including spraying, dipping, brushing and flow coating It may be applied to the surface of the upper mold part by any suitable method.

Claims (11)

  1. . A fuel injector provided that at least one portion of the fuel injector is covered with an overmolding material; wherein the overmolded portion is at least partly coated with a material having hydrophobic characteristics.
  2. . The fuel injector according to claim 1, wherein said fuel injector is used in diesel fuel injection system.
  3. . The fuel injector according to claim 1, wherein the overmolding material comprises PA66 or PA6T.
  4. . The fuel injector according to cIaim 3, wherein the overmolding material is PA66.
  5. . The fuel injector according to claim 1, wherein the material having hydrophobic characteristics is a superhydrophobic coating material.
  6. . The fuel injector according to claim 1, wherein the material is manganese oxide polystyrene (MnOz/PS).
  7. . The fuel injector according to claim 1, wherein the material is zinc oxide polystyrene (ZnO/PS) nano-composite.
  8. . The fuel injector according to claim 1, wherein the material is precipitated calcium carbonate.
  9. . The fuel injector according to claim 1, wherein the material is carbon nano-tube structures.
  10. 10.The fuel injector according to claim 1, wherein the material is silica nano-coating.
  11. 11.The fuel injector according to claim 1, wherein the contact angle of the material having hydrophobic characteristics is greater than 150°.
TR2017/05918A 2017-04-21 2017-04-21 Fuel injector having hydrophobic coating TR201705918A3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
TR2017/05918A TR201705918A3 (en) 2017-04-21 2017-04-21 Fuel injector having hydrophobic coating
DE112018001467.3T DE112018001467T5 (en) 2017-04-21 2018-04-19 FUEL INJECTION DEVICE EMBODYING A HYDROPHOBIC COATING
PCT/EP2018/059986 WO2018193013A1 (en) 2017-04-21 2018-04-19 Fuel injector having hydrophobic coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2017/05918A TR201705918A3 (en) 2017-04-21 2017-04-21 Fuel injector having hydrophobic coating

Publications (1)

Publication Number Publication Date
TR201705918A3 true TR201705918A3 (en) 2018-12-21

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ID=62044702

Family Applications (1)

Application Number Title Priority Date Filing Date
TR2017/05918A TR201705918A3 (en) 2017-04-21 2017-04-21 Fuel injector having hydrophobic coating

Country Status (3)

Country Link
DE (1) DE112018001467T5 (en)
TR (1) TR201705918A3 (en)
WO (1) WO2018193013A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5820099A (en) * 1997-05-20 1998-10-13 Siemens Automotive Corporation Fluid migration inhibitor for fuel injectors
US6382532B1 (en) * 2000-08-23 2002-05-07 Robert Bosch Corporation Overmold constrained layer damper for fuel injectors
US6418912B1 (en) * 2000-12-18 2002-07-16 Siemens Automotive Corporation HPDI injector and packaging
US7258282B2 (en) * 2003-12-19 2007-08-21 Siemens Vdo Automotive Corporaton Fuel injector with an armature assembly having a continuous elongated armature and a metering assembly having a seat and polymeric support member

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Publication number Publication date
DE112018001467T5 (en) 2019-12-05
WO2018193013A1 (en) 2018-10-25

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