WO2005068825A1 - Tige de soupape et soupape - Google Patents

Tige de soupape et soupape Download PDF

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Publication number
WO2005068825A1
WO2005068825A1 PCT/EP2005/050095 EP2005050095W WO2005068825A1 WO 2005068825 A1 WO2005068825 A1 WO 2005068825A1 EP 2005050095 W EP2005050095 W EP 2005050095W WO 2005068825 A1 WO2005068825 A1 WO 2005068825A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
valve
wear protection
valve needle
seat
Prior art date
Application number
PCT/EP2005/050095
Other languages
German (de)
English (en)
Inventor
Eberhard Kull
Werner Fruth
Jürgen Schindlatz
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to DE112005000139T priority Critical patent/DE112005000139A5/de
Publication of WO2005068825A1 publication Critical patent/WO2005068825A1/fr

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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/02—Pretreatment of the material to be coated
    • C23C16/0272—Deposition of sub-layers, e.g. to promote the adhesion of the main coating
    • C23C16/0281—Deposition of sub-layers, e.g. to promote the adhesion of the main coating of metallic sub-layers
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/26—Deposition of carbon only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
    • C23C28/042—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
    • C23C28/044—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material coatings specially adapted for cutting tools or wear applications
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
    • C23C28/046—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material with at least one amorphous inorganic material layer, e.g. DLC, a-C:H, a-C:Me, the layer being doped or not
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C23C28/343—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one DLC or an amorphous carbon based layer, the layer being doped or not
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C23C28/347—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with layers adapted for cutting tools or wear applications
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/36—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including layers graded in composition or physical properties
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/40—Coatings including alternating layers following a pattern, a periodic or defined repetition
    • C23C28/42—Coatings including alternating layers following a pattern, a periodic or defined repetition characterized by the composition of the alternating layers
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9038—Coatings
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for

Definitions

  • the invention relates to a valve needle and a valve with a valve body, in which a seat is formed, and with a valve needle, which has a seating area which is in contact with the seat of the valve body in a closed position of the valve needle.
  • Valves of this type are used in particular for supplying fuel in combustion chambers of internal combustion engines. Valves of this type are increasingly supplied with fluid, in particular fuel, which is at a very high pressure, for example up to 2000 bar in diesel internal combustion engines. Valves of this type are increasingly being driven by means of piezo drives, which have been given a very fast switching and thus allow several partial injections during a working cycle of a cylinder of the internal combustion engine. Depending on the operating state, for example, up to five partial injections are carried out per working cycle of the cylinder.
  • valve needle In its closed position, the valve needle rests with its seating area on a seat of a valve body of the valve. With each injection process, the valve needle is moved into a position away from the closed position and then moved back into the closed position. Due to the high forces with which the valve needle is pressed into the seat of the valve body in its seating area and the very frequent movements of the valve needle back and forth from its closed position during operation, the valve needle is subjected to very heavy wear.
  • microrelative movements of the seat area and occur of the seat of the valve body which lead to high abassive loads on the valve needle and the valve body even before the yield point is reached. As a result, the spray pattern and the tightness of the injection valve can change negatively, and a failure of the valve may occur.
  • An injection valve is known from DE 100 38 954 A1, the valve needle of which is provided with a metallic adhesion promoter layer and a diamond-like wear protection layer applied thereon.
  • the thickness of the wear protection layer is in the range from 0.05 to a maximum of 4 ⁇ m. Due to the ever increasing number of partial injections during a working cycle of a cylinder and increasing demands on the overall service life of the valve or the valve needle, these requirements can no longer be met with such a wear protection layer.
  • valve with a valve needle is also known, which is coated with a diamond-like carbon layer.
  • the object of the invention is to provide a valve needle and a valve which are reliable over a long period of operation.
  • the invention is characterized by a valve needle and a valve with a valve needle and with a valve body, in which a seat is formed.
  • the valve needle has a seating area which is in contact with the seat of the valve body in a closed position of the valve needle.
  • the valve body is provided in the area of the seat and / or the valve needle is provided in the seat area with a layer sequence of at least one adhesive layer, a first wear protection layer and a second adhesive layer with a second wear protection layer.
  • the wear protection layers can thus have a thickness which can ensure that excessive residual stresses do not occur which can lead to the wear protection layers flaking off.
  • the valve needle or the valve body can be protected even under highly abrasive conditions for a very long operating time.
  • the layer structure also has the advantage that wear protection layers, which may be thinner, have a higher elasticity than a single, correspondingly thicker wear protection layer. If, on the other hand, the thickness of a single wear protection layer is greatly increased, it can only cope with extremely small deformations without causing cracks. The total elasticity of the layer sequence is increased by the adhesive layers, which have elastic properties.
  • the wear protection layers are diamond-like carbon layers.
  • Diamond-like carbon layers of this type are distinguished by a very high proportion of carbon and a high number of tetragonal carbon bonds, so-called sp 3 compounds.
  • Diamond-like carbon layers have diamond-like properties and are therefore extremely hard and have a low wear coefficient.
  • the adhesive layers are each a metal layer.
  • Corresponding metal layers are characterized by good adhesive properties for the wear protection layers. They ensure a very good durability of the wear protection layers due to the good heat conduction properties - creation of metals and a related improved heat dissipation from the wear protection layers. This is a significant advantage, especially when the valve or the valve needle is used under high operating temperatures, since the individual wear protection layers are better protected against thermal destruction.
  • the improved heat dissipation can be extremely effective, especially in connection with diamond-like carbon layers
  • Graphitization of the diamond-like carbon layers can be prevented, that is, a conversion of the sp3 carbon bond into graphite-typical sp2 Carbon bonds. In this way, the wear protection can be guaranteed over a very long operating period even under extreme operating conditions.
  • the adhesive layer comprises reactive compounds.
  • Nitrides or carbides have a high hardness and wear resistance if, for example, as a reaction partner for the metal component Nitrogen, oxygen or a carbon gas is used.
  • FIG. 2a shows an enlargement of a section of the valve according to FIG. 2 in the region of a tip of a valve needle and FIGS. 2b and 2c further enlargements of the valve needle in the region of the valve tip.
  • An injection valve 1 has a valve body 2 with a recess 3, into which a valve needle 4 is inserted.
  • the valve needle 4 has a guide 5, in the area of which it is guided in the recess 3 of the valve body 2.
  • the recess 3 has a blind hole 6 from which a nozzle opening 7 is guided through the valve body 2 to the outside and through which the fuel is metered into the combustion chamber of the cylinder of the internal combustion engine.
  • the valve needle 4 In the area of a tip 8 of the valve needle 4, the valve needle 4 has a seating area 9 with that it comes into contact with a seat 10 of the valve body 2 in the closed position shown in FIG. 1 and thus seals the blind hole 6 and thus also the nozzle opening 7 from a supply bore 11 for supplying fuel.
  • valve needle (FIGS. 2a to 2c) is coated, at least in its seating area 9, with a layer sequence described below. However, it can also be coated in a wider area, for example in the entire area of the tip 8 of the valve needle 4 or even up to its guide 5 or including its guide 5, with the layer sequence described below. Alternatively or additionally, the valve body 2 can also be coated with the following layer sequence at least in the region of the seat 10 of the valve body. However, valve needle 4 is preferably coated with the layer sequence, since this is simpler in terms of production technology.
  • the layer sequence consists at least of a first adhesive layer 14, a first wear protection layer 16, a second adhesive layer 18 and a second wear protection layer 20.
  • the adhesive layers 14, 18, 22 are designed such that they adhere well to the wear protection layers 16, 20. 24 ensure.
  • the adhesive layers 14, 18, 22 preferably consist of pure metals, for example Cr, Ti, Al, W, Wc or are reactive compounds, for example with nitrogen, that is to say hard material layers or with nitrogen and oxygen, that is to say oxynitrides or with a reactive gas, a hydrocarbon gas layer.
  • the wear protection layers 16, 20, 24 preferably consist of diamond-like carbon layers which are distinguished by a very high carbon content and in which the Carbon atoms enter into a large number of sp ⁇ compounds, so-called tetragonal carbon compounds.
  • Such diamond-like carbon layers are also referred to as DLC layers, as amorphous, diamond-like carbon ac: ho- or also as a hydrogen-free carbon layer ta-c layers.
  • the abrasion wear coefficient of such layers is below 1 x 10- ⁇ 5 rct ⁇ N - ⁇ - irf " !.
  • the sliding friction coefficients of these layers are dry at ⁇ ⁇ 0.2 and in diesel-lubricated arrangements significantly lower.
  • CVD chemical vapor d-position
  • the individual wear protection layer is preferably between about 0.1 to 3 ⁇ m thick.
  • the individual adhesive layer 14, 18, 22 is preferably a few hundredths to tenths thick. With such an alternating layer sequence, a total layer thickness of, for example, 10 ⁇ m can easily be produced. If the adhesive layers 14, 18, 22 have good thermal conductivity, a graphitization of the wear protection layers 16, 20, 24 is reliably avoided even under a high thermal load, as occurs in internal combustion engines. So it can be advantageous to provide a large number of adhesive layers and wear protection layers to achieve less thick but also very thick total layer thicknesses, so as to keep the thermal load on the individual wear protection layer low. It can also be advantageous to make the inner wear protection layers thinner than the outer wear protection layers.
  • a third adhesive layer 22 (FIG. 2C) and a third wear protection layer 24 can also be provided.
  • additional adhesive layers and wear protection layers can also be provided. Appropriate process control during the deposition of the adhesive layers and the wear protection layers can also result in a gradual transition from the respective adhesive layer to the wear protection layer and vice versa. In this way, correspondingly adapted tribological properties can also be ensured in the area of the transition.
  • the layer sequence described enables total layer thicknesses of 10 ⁇ m and above to be produced. Of course, the total layer thicknesses can also be significantly less than 10 ⁇ m.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape comportant un corps de soupape (2) dans lequel est conçu un siège, et une tige de soupape (4) présentant une zone de siège s'appuyant contre le siège du corps de soupape (2) dans une position de fermeture de la tige de soupape (4). Dans la zone de siège, le corps de soupape (2) et/ou la tige de soupape (4) sont pourvus d'une suite de couches composée d'au moins une première couche adhésive (14), d'une première couche de protection contre l'usure (16), d'une deuxième couche adhésive (18) et d'une deuxième couche de protection contre l'usure (20).
PCT/EP2005/050095 2004-01-19 2005-01-11 Tige de soupape et soupape WO2005068825A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112005000139T DE112005000139A5 (de) 2004-01-19 2005-01-11 Ventilnadel und Ventil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002678.5 2004-01-19
DE200410002678 DE102004002678B4 (de) 2004-01-19 2004-01-19 Ventilnadel und Ventil

Publications (1)

Publication Number Publication Date
WO2005068825A1 true WO2005068825A1 (fr) 2005-07-28

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WO2007017347A1 (fr) * 2005-08-09 2007-02-15 Robert Bosch Gmbh Revetement pour composants a forte sollicitation mecanique
WO2007028674A1 (fr) * 2005-09-06 2007-03-15 Robert Bosch Gmbh Injecteurs de carburant ou gicleurs pour moteurs a combustion interne a auto-allumage
WO2010072450A1 (fr) * 2008-12-23 2010-07-01 Robert Bosch Gmbh Procédé et système d'injection de carburant dans les machines à combustion interne
WO2010133388A1 (fr) * 2009-05-18 2010-11-25 Robert Bosch Gmbh Agencement de couche de protection anti-usure et composant avec agencement de couche de protection anti-usure
WO2016034339A1 (fr) * 2014-09-02 2016-03-10 Robert Bosch Gmbh Soupape et procédé de fabrication d'une soupape
EP3434890A1 (fr) * 2017-07-28 2019-01-30 Delphi Technologies IP Limited Matériau de revêtement
CN109944726A (zh) * 2017-11-29 2019-06-28 株式会社电装 燃料喷射阀
EP3530408A1 (fr) * 2018-02-26 2019-08-28 Robert Bosch GmbH Dispositif pour la coupe par jet de fluide haute pression

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AT503288B1 (de) 2006-07-26 2007-09-15 Bosch Gmbh Robert Verfahren zum aufbringen eines beschichtungsmaterials sowie beschichtung für eine metallische oberfläche
EP2067983B1 (fr) * 2007-12-04 2014-07-16 Continental Automotive GmbH Ensemble de vanne pour soupape d'injection, et soupape d'injection
DE102008009030A1 (de) * 2008-02-14 2009-09-03 Continental Automotive Gmbh Ventilnadel und Ventil
US10626834B2 (en) 2016-05-03 2020-04-21 GM Global Technology Operations LLC Fuel injector for an internal combustion engine

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007017347A1 (fr) * 2005-08-09 2007-02-15 Robert Bosch Gmbh Revetement pour composants a forte sollicitation mecanique
WO2007017346A1 (fr) * 2005-08-09 2007-02-15 Robert Bosch Gmbh Revetement pour composants a forte sollicitation mecanique
WO2007028674A1 (fr) * 2005-09-06 2007-03-15 Robert Bosch Gmbh Injecteurs de carburant ou gicleurs pour moteurs a combustion interne a auto-allumage
WO2010072450A1 (fr) * 2008-12-23 2010-07-01 Robert Bosch Gmbh Procédé et système d'injection de carburant dans les machines à combustion interne
WO2010133388A1 (fr) * 2009-05-18 2010-11-25 Robert Bosch Gmbh Agencement de couche de protection anti-usure et composant avec agencement de couche de protection anti-usure
CN102428207A (zh) * 2009-05-18 2012-04-25 罗伯特·博世有限公司 防磨损层结构以及具有防磨损层结构的构件
WO2016034339A1 (fr) * 2014-09-02 2016-03-10 Robert Bosch Gmbh Soupape et procédé de fabrication d'une soupape
CN106662057A (zh) * 2014-09-02 2017-05-10 罗伯特·博世有限公司 阀和用于制造阀的方法
US10415526B2 (en) 2014-09-02 2019-09-17 Robert Bosch Gmbh Valve and method for producing a valve
US11060494B2 (en) 2014-09-02 2021-07-13 Robert Bosch Gmbh Valve and method for producing a valve
EP3434890A1 (fr) * 2017-07-28 2019-01-30 Delphi Technologies IP Limited Matériau de revêtement
CN109944726A (zh) * 2017-11-29 2019-06-28 株式会社电装 燃料喷射阀
EP3530408A1 (fr) * 2018-02-26 2019-08-28 Robert Bosch GmbH Dispositif pour la coupe par jet de fluide haute pression

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DE102004002678A1 (de) 2005-08-18
DE112005000139A5 (de) 2008-06-19

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