WO2006072521A1 - Fuel injection valve for internal combustion chambers - Google Patents
Fuel injection valve for internal combustion chambers Download PDFInfo
- Publication number
- WO2006072521A1 WO2006072521A1 PCT/EP2005/056530 EP2005056530W WO2006072521A1 WO 2006072521 A1 WO2006072521 A1 WO 2006072521A1 EP 2005056530 W EP2005056530 W EP 2005056530W WO 2006072521 A1 WO2006072521 A1 WO 2006072521A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- injection valve
- fuel
- internal combustion
- nubs
- 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.)
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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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1846—Dimensional characteristics of discharge orifices
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- 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
- F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
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- 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
Definitions
- Fuel injection valves such as are preferably used for direct-injection and auto-ignition internal combustion engines, are exposed to high temperatures at their injection-side end, which projects into the combustion chamber, as they occur during combustion. If fuel residues remain in or around the injection port after injection, they may coke through the high temperatures during combustion causing a corresponding coking layer in the injection port or in the region of the injection port
- the fuel injection valve according to the invention has the advantage that the injection openings and the possibly subsequent outer wall areas of the fuel injection valve are reliably protected against coking.
- the injection openings and / or the outer wall of the fuel injection valve are provided in the region of the outlet of the injection openings with a plurality of nubs. These nubs are designed in size and shape so that the so-called lotus effect is formed, which reliably prevents an accumulation of material of various kinds. Any residues that form in the area of the injection openings are removed by the passing fuel in the subsequent injections, so that an unchanged surface of the injection openings is permanently present.
- the knobs have a substantially conical shape, so that any depositing coking particles attach only to the tip of the conical nubs and thus only very low adhesion forces between the particles and the dimpled surface is formed. As a result, these particles are easily removed again by the passing fuel and can not accumulate permanently.
- the nubs can either be the same or have different diameters and heights, which are then preferably stochastically distributed. The diameter of the nubs is preferably 1 to 10 .mu.m, wherein the height of the nubs is preferably in the same order of magnitude.
- FIG. 2 shows an enlargement of the designated II section in
- FIG. 3b shows an enlargement of the section of FIG
- FIG. 2 wherein FIGS. 3a and 3b show different configurations of the dimples.
- the fuel injection valve has a housing 1, which comprises a valve body 3.
- a bore 5 is formed, which is delimited at its combustion-chamber-side end by a conical valve seat 8.
- a valve needle 7 is arranged longitudinally displaceable, which is guided in a guide portion 107 in the bore 5.
- the valve needle 7 tapers to form a pressure shoulder 12, merges into a shaft region 207 and finally ends at its valve seat facing end in a conical sealing surface 9.
- a pressure chamber 11 is formed, which is filled via an inlet channel 17 with fuel at high pressure.
- an opening force directed away from the valve seat acts on the pressure shoulder 12 of the valve needle 7 counteracting a closing force which acts on the end of the valve needle 7 facing away from the valve seat, for example by a spring element or a control chamber which can be filled with varying fuel pressure.
- valve seat 8 a plurality of injection openings 15 are formed, which open into the combustion chamber of the internal combustion engine when the fuel injection valve is installed in a corresponding internal combustion engine.
- the valve needle 7 cooperates with its sealing surface 9 with the valve seat 8 in such a way that upon contact of the valve needle 7 on the valve seat 8, the pressure chamber 11 is separated from the injection ports 15, while lifted from the valve seat 8 valve needle 7, a fuel flow from the Pressure chamber 11 to the injection openings 15 instead- - A -
- Figure 2 shows an enlargement of Figure 1 in the region of the valve seat 8, wherein the region in Figure 1 is designated II.
- the enlarged illustrated injection port 15 has in its inside a plurality of nubs 20 which line the inside.
- the knobs 20 can continue on the end face 103 of the valve body 3, especially in the area surrounding the outlet openings of the injection openings 15. However, it can also be provided to provide the entire surface of the fuel injection valve, which protrudes into the combustion chamber, with nubs 20.
- the surface of the injection port 15 gets dirt-repellent properties, which are known as the so-called lotus effect. Dirt or soot particles that deposit on this surface touch the surface only at the tip of the dimples 20, so that only very low adhesion forces between the dirt particle and the surface are present. The dirt or soot particles can then easily be entrained by the fuel flow which flows through the injection opening 15 during the injection, so that no deposits of such particles occur, and the injection opening 15 remains unchanged over the entire service life of the injection valve.
- FIG. 3 a shows an enlarged detail of the detail of FIG. 2 designated III.
- the nubs 20 here have a conical shape and have a diameter d, which is preferably in the range of 1 to 10 microns.
- the height of the knobs 20 moves in the same order of magnitude, the knobs 20 are arranged very close and between the individual knobs 20 no or very little space is available.
- FIG. 3b shows a further exemplary embodiment, in which the knobs 20 have a slightly different shape and are rounded.
- the height of the individual nubs h ⁇ , ⁇ v ⁇ can be different, so that, for example, a stochastic distribution of the heights is given.
- the knobs 20 are either distributed uniformly over the surface or perforated. distributed chastically, so that results in a non-uniform arrangement of pimples.
- nubs can be done with different methods. For example, the coating with a corresponding material, which forms such a knob-like structure when cured, or the treatment of the surface with a laser or with a sputtering process.
- dimples in a rounded shape or in the form of cones, other shapes are also conceivable, such as, for example, pyramids or other tips which are correspondingly dense and small in order to prevent the accumulation of soot and other dirt particles.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Kraftstoffeinspritzventil für BrennkraftmaschinenFuel injection valve for internal combustion engines
Stand der TechnikState of the art
Kraftstoffeinspritzventile, wie Sie vorzugsweise für direkteinspritzende und selbstzündende Brennkraftmaschinen verwendet werden, sind an ihrem einspritz- seitigen Ende, das in den Brennraum hineinragt, hohen Temperaturen ausgesetzt, wie sie bei der Verbrennung entstehen. Verbleiben in oder im Bereich der Einspritzöffnung Kraftstoffrückstände nach der Einspritzung, so können diese durch die hohen Temperaturen während der Verbrennung verkoken, sodass sich eine entsprechende Verkokungsschicht in der Einspritzöffnung oder im Bereich desFuel injection valves, such as are preferably used for direct-injection and auto-ignition internal combustion engines, are exposed to high temperatures at their injection-side end, which projects into the combustion chamber, as they occur during combustion. If fuel residues remain in or around the injection port after injection, they may coke through the high temperatures during combustion causing a corresponding coking layer in the injection port or in the region of the injection port
Austritts der Einspritzöffnung bilden kann. Diese Verkokungsschicht führt mit der Zeit zu einer Verengung des Einspritzöffnung und damit zu einer Veränderung der Einspritzcharakteristik und der eingespritzten Menge.Exit the injection port can form. Over time, this coking layer leads to a narrowing of the injection opening and thus to a change in the injection characteristic and the injected quantity.
Aus der Offenlegungsschrift DE 10 2004 020 175 ist bekannt, die Einspritzöffnungen mit einer Beschichtung zu versehen, die die Anlagerung einer Verkokungsschicht verhindern soll. Solche Beschichtungen bieten jedoch nicht immer einen ausreichenden Schutz vor Verkokung und weisen darüber hinaus den Nachteil auf, dass sie von der entsprechenden Oberfläche abplatzen können, was insbe- sondere im Bereich der Einspritzöffnungen vorkommen kann, wo durch die sehr hohen hydraulischen Drücke entsprechend hohe mechanische Kräfte auftreten.From the published patent application DE 10 2004 020 175 it is known to provide the injection openings with a coating which is intended to prevent the deposition of a coking layer. Such coatings, however, do not always offer sufficient protection against coking and moreover have the disadvantage that they can chip off from the corresponding surface, which can occur in particular in the area of the injection openings, where correspondingly high mechanical forces are caused by the very high hydraulic pressures occur.
Weiter ist aus der Offenlegungsschrift DE 42 00 709 Al bekannt, die Einspritzöffnungen mit Abrisskanten zu versehen, die quer zur Strömungsrichtung in der Wand der Einspritzöffnungen verlaufen. Solche Abrisskanten bewirken eine bes- sere Zerstäubung des Kraftstoffs, sind jedoch nicht geeignet, eine Anlagerung von Verkokungsmaterial in diesem Bereich zu verhindern.Furthermore, it is known from the published patent application DE 42 00 709 A1 to provide the injection openings with separation edges which extend transversely to the flow direction in the wall of the injection openings. Such demolition edges cause a However, this fuel atomization, but are not suitable to prevent accumulation of coking material in this area.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Kraftstoffeinspritzventil weist demgegenüber den Vorteil auf, dass die Einspritzöffnungen und die sich gegebenenfalls noch anschließenden Außenwandbereiche des Kraftstoffeinspritzventils zuverlässig vor Verkokung geschützt werden. Hierzu sind die Einspritzöffnungen und/oder die Außenwand des Kraftstoffeinspritzventils im Bereich des Austritts der Einspritzöffnungen mit einer Vielzahl von Noppen versehen. Diese Noppen sind in Größe und Gestalt so ausgebildet, dass sich der so genannte Lotuseffekt ausbildet, der eine Anlagerung von Material verschiedenster Art zuverlässig verhindert. Sich evtl. doch bildende Rückstände im Bereich der Einspritzöffnungen werden durch den vorbeifließen- den Kraftstoff bei den nachfolgenden Einspritzungen abgetragen, sodass dauerhaft eine unveränderte Oberfläche der Einspritzöffnungen gegeben ist.In contrast, the fuel injection valve according to the invention has the advantage that the injection openings and the possibly subsequent outer wall areas of the fuel injection valve are reliably protected against coking. For this purpose, the injection openings and / or the outer wall of the fuel injection valve are provided in the region of the outlet of the injection openings with a plurality of nubs. These nubs are designed in size and shape so that the so-called lotus effect is formed, which reliably prevents an accumulation of material of various kinds. Any residues that form in the area of the injection openings are removed by the passing fuel in the subsequent injections, so that an unchanged surface of the injection openings is permanently present.
Durch die abhängigen Ansprüche sind vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung möglich. In einer ersten vorteilhaften Ausgestaltung weisen die Noppen eine im wesentlichen kegelförmige Gestalt auf, sodass sich gegebenenfalls ablagernde Verkokungspartikel nur auf der Spitze der kegelförmigen Noppen ansetzten und damit nur sehr geringe Adhäsionskräfte zwischen den Partikeln und der genoppten Oberfläche entsteht. Dadurch werden diese Partikel leicht wieder durch den vorbeifließenden Kraftstoff abgetragen und können sich nicht dauerhaft anlagern. Hierbei können die Noppen entweder sämtlich gleich ausgebildet sein oder auch unterschiedliche Durchmesser und Höhen aufweisen, die dann vorzugsweise stochastisch verteilt sind. Der Durchmesser der Noppen beträgt vorzugsweise 1 bis 10 μm, wobei die Höhe der Noppen vorzugsweise in der gleichen Größenordnung liegt.By the dependent claims advantageous embodiments of the subject invention are possible. In a first advantageous embodiment, the knobs have a substantially conical shape, so that any depositing coking particles attach only to the tip of the conical nubs and thus only very low adhesion forces between the particles and the dimpled surface is formed. As a result, these particles are easily removed again by the passing fuel and can not accumulate permanently. In this case, the nubs can either be the same or have different diameters and heights, which are then preferably stochastically distributed. The diameter of the nubs is preferably 1 to 10 .mu.m, wherein the height of the nubs is preferably in the same order of magnitude.
Zeichnungdrawing
In der Zeichnung ist ein Ausführungsbeispiel des erfindungsgemäßen Kraftstoffeinspritzventils dargestellt. Es zeigt Figur 1 einen Längsschnitt durch ein erfindungsgemäßes Kraftstoffeinspritzventil,In the drawing, an embodiment of the fuel injection valve according to the invention is shown. It shows 1 shows a longitudinal section through a fuel injection valve according to the invention,
Figur 2 eine Vergrößerung des mit II bezeichneten Ausschnitts imFigure 2 shows an enlargement of the designated II section in
Bereich einer Einspritzöffhung, Figur 3a undArea of a Einspritzöffhung, Figure 3a and
Figur 3b eine Vergrößerung des mit III bezeichneten Ausschnitts vonFIG. 3b shows an enlargement of the section of FIG
Figur II, wobei Figur 3 a und 3b unterschiedliche Ausgestaltungen der Noppen zeigen.FIG. 2, wherein FIGS. 3a and 3b show different configurations of the dimples.
Beschreibung des AusfϊihrungsbeispielsDescription of the Ausfϊihrungsbeispiels
In Figur 1 ist ein Längsschnitt durch ein erfindungsgemäßes Kraftstoffeinspritzventil schematisch dargestellt. Das Kraftstoffeinspritzventil weist ein Gehäuse 1 auf, das einen Ventilkörper 3 umfasst. Im Ventilkörper 3 ist eine Bohrung 5 aus- gebildet, die an ihrem brennraumseitigen Ende von einem konischen Ventilsitz 8 begrenzt wird. In der Bohrung 5 ist eine Ventilnadel 7 längsverschiebbar angeordnet, die in einem Führungsbereich 107 in der Bohrung 5 geführt ist. Ausgehend vom Führungsbereich 107 verjüngt sich die Ventilnadel 7 unter Bildung einer Druckschulter 12, geht in einen Schaftbereich 207 über und endet schließlich an ihrem ventilsitzzugewandten Ende in einer konischen Dichtfläche 9. Zwischen dem Schaftbereich 207 und der Wand der Bohrung 5 ist ein Druckraum 11 ausgebildet, der über einen Zulaufkanal 17 mit Kraftstoff unter hohem Druck befüllbar ist. Durch den Druck im Druckraum 11 wirkt eine vom Ventilsitz weggerichtete Öffnungskraft auf die Druckschulter 12 der Ventilnadel 7, der eine Schließkraft entgegenwirkt, die auf das ventilsitzabgewandte Ende der Ventilnadel 7 einwirkt, bspw. durch ein Federelement oder einen mit wechselndem Kraftstoffdruck be- füllbaren Steuerraum.1 shows a longitudinal section through a fuel injection valve according to the invention is shown schematically. The fuel injection valve has a housing 1, which comprises a valve body 3. In the valve body 3, a bore 5 is formed, which is delimited at its combustion-chamber-side end by a conical valve seat 8. In the bore 5, a valve needle 7 is arranged longitudinally displaceable, which is guided in a guide portion 107 in the bore 5. Starting from the guide region 107, the valve needle 7 tapers to form a pressure shoulder 12, merges into a shaft region 207 and finally ends at its valve seat facing end in a conical sealing surface 9. Between the shaft region 207 and the wall of the bore 5, a pressure chamber 11 is formed, which is filled via an inlet channel 17 with fuel at high pressure. Due to the pressure in the pressure chamber 11, an opening force directed away from the valve seat acts on the pressure shoulder 12 of the valve needle 7 counteracting a closing force which acts on the end of the valve needle 7 facing away from the valve seat, for example by a spring element or a control chamber which can be filled with varying fuel pressure.
Im Ventilsitz 8 sind mehrere Einspritzöffnungen 15 ausgebildet, die in den Brenn- räum der Brennkraftmaschine münden, wenn das Kraftstoffeinspritzventil in eine entsprechende Brennkraftmaschine eingebaut ist. Die Ventilnadel 7 wirkt mit ihrer Dichtfläche 9 mit dem Ventilsitz 8 zusammen und zwar in der Weise, dass bei Anlage der Ventilnadel 7 am Ventilsitz 8 der Druckraum 11 von den Einspritzöffnungen 15 getrennt wird, während bei vom Ventilsitz 8 abgehobener Ventilnadel 7 ein Kraftstofffluss aus dem Druckraum 11 zu den Einspritzöffnungen 15 statt- - A -In the valve seat 8 a plurality of injection openings 15 are formed, which open into the combustion chamber of the internal combustion engine when the fuel injection valve is installed in a corresponding internal combustion engine. The valve needle 7 cooperates with its sealing surface 9 with the valve seat 8 in such a way that upon contact of the valve needle 7 on the valve seat 8, the pressure chamber 11 is separated from the injection ports 15, while lifted from the valve seat 8 valve needle 7, a fuel flow from the Pressure chamber 11 to the injection openings 15 instead- - A -
findet, durch die Kraftstoff in den Brennraum der Brennkraftmaschine eingespritzt wird.takes place, is injected through the fuel into the combustion chamber of the internal combustion engine.
Figur 2 zeigt eine Vergrößerung von Figur 1 im Bereich des Ventilsitzes 8, wobei der Bereich in Figur 1 mit II bezeichnet ist. Die vergrößert dargestellte Einspritzöffnung 15 weist in ihrer Innenseite eine Vielzahl von Noppen 20 auf, die die Innenseite auskleiden. Die Noppen 20 können sich auch auf der Stirnseite 103 des Ventilkörpers 3 fortsetzen, vor allem in dem Bereich, der die Austrittsöffnungen der Einspritzöffnungen 15 umgibt. Es kann aber auch vorgesehen sein, die gesam- te Oberfläche des Kraftstoffeinspritzventils, die in den Brennraum ragt, mit Noppen 20 zu versehen.Figure 2 shows an enlargement of Figure 1 in the region of the valve seat 8, wherein the region in Figure 1 is designated II. The enlarged illustrated injection port 15 has in its inside a plurality of nubs 20 which line the inside. The knobs 20 can continue on the end face 103 of the valve body 3, especially in the area surrounding the outlet openings of the injection openings 15. However, it can also be provided to provide the entire surface of the fuel injection valve, which protrudes into the combustion chamber, with nubs 20.
Durch die Noppen 20 bekommt die Oberfläche der Einspritzöffnung 15 schmutzabweisende Eigenschaften, die als sogenannter Lotuseffekt bekannt sind. Schmutz oder Rußpartikel, die sich auf dieser Oberfläche ablagern, berühren die Oberfläche nur an der Spitze der Noppen 20, sodass nur sehr geringe Adhäsionskräfte zwischen dem Schmutzpartikel und der Oberfläche vorhanden sind. Die Schmutz oder Rußpartikel könnend dann durch den Kraftstoffstrom, der bei der Einspritzung durch die Einspritzöffnung 15 hindurchfließt, leicht mitgerissen werden, so- dass es zu keinen Anlagerungen von derartigen Partikeln kommt und die Einspritzöffnung 15 bleibt über die gesamte Lebensdauer des Einspritzventils unverändert.By the nubs 20, the surface of the injection port 15 gets dirt-repellent properties, which are known as the so-called lotus effect. Dirt or soot particles that deposit on this surface touch the surface only at the tip of the dimples 20, so that only very low adhesion forces between the dirt particle and the surface are present. The dirt or soot particles can then easily be entrained by the fuel flow which flows through the injection opening 15 during the injection, so that no deposits of such particles occur, and the injection opening 15 remains unchanged over the entire service life of the injection valve.
Figur 3 a zeigt den mit III bezeichneten Ausschnitt von Figur 2 in vergrößerter Darstellung. Die Noppen 20 weisen hier eine kegelförmige Gestalt auf und haben einen Durchmesser d, der vorzugsweise im Bereich von 1 bis 10 um liegt. Die Höhe der Noppen 20 bewegt sich in derselben Größenordnung, wobei die Noppen 20 sehr dicht angeordnet sind und zwischen den einzelnen Noppen 20 kein oder nur sehr geringer Raum vorhanden ist.FIG. 3 a shows an enlarged detail of the detail of FIG. 2 designated III. The nubs 20 here have a conical shape and have a diameter d, which is preferably in the range of 1 to 10 microns. The height of the knobs 20 moves in the same order of magnitude, the knobs 20 are arranged very close and between the individual knobs 20 no or very little space is available.
Figur 3b zeigt ein weiteres Ausführungsbeispiel, bei dem die Noppen 20 eine etwas andere Gestalt aufweisen und abgerundet ausgebildet sind. Die Höhe der einzelnen Noppen h\, \vχ kann unterschiedlich sein, sodass beispielsweise eine sto- chastische Verteilung der Höhen gegeben ist. Genauso kann es vorgesehen sein, die Noppen 20 entweder gleichmäßig über die Oberfläche zu verteilen oder sto- chastisch zu verteilen, sodass sich eine ungleichmäßige Anordnung von Noppen ergibt.FIG. 3b shows a further exemplary embodiment, in which the knobs 20 have a slightly different shape and are rounded. The height of the individual nubs h \, \ vχ can be different, so that, for example, a stochastic distribution of the heights is given. In the same way, it can be provided that the knobs 20 are either distributed uniformly over the surface or perforated. distributed chastically, so that results in a non-uniform arrangement of pimples.
Die Herstellung solcher Noppen kann mit verschiedenen Verfahren geschehen. In Frage kommen z.B. die Beschichtung mit einem entsprechenden Material, das bei der Aushärtung eine solch noppenartige Struktur ausbildet, oder die Bearbeitung der Oberfläche mit einem Laser oder mit einem Sputter- Verfahren.The production of such nubs can be done with different methods. For example, the coating with a corresponding material, which forms such a knob-like structure when cured, or the treatment of the surface with a laser or with a sputtering process.
Neben der Ausbildung der Noppen in abgerundeter Form oder in Form von Ke- geln sind auch andere Formen denkbar wie bspw. Pyramiden oder sonstige Spitzen, die entsprechend dicht und klein ausgebildet sind, um die Anlagerung von Ruß und sonstigen Schmutzpartikeln zu verhindern. In addition to the formation of the dimples in a rounded shape or in the form of cones, other shapes are also conceivable, such as, for example, pyramids or other tips which are correspondingly dense and small in order to prevent the accumulation of soot and other dirt particles.
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT05818956T ATE486212T1 (en) | 2004-12-29 | 2005-12-06 | FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES |
| DE502005010456T DE502005010456D1 (en) | 2004-12-29 | 2005-12-06 | FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES |
| EP05818956A EP1834080B1 (en) | 2004-12-29 | 2005-12-06 | Fuel injection valve for internal combustion chambers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004063165.4 | 2004-12-29 | ||
| DE102004063165A DE102004063165A1 (en) | 2004-12-29 | 2004-12-29 | Fuel injection valve for internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006072521A1 true WO2006072521A1 (en) | 2006-07-13 |
Family
ID=35717511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2005/056530 Ceased WO2006072521A1 (en) | 2004-12-29 | 2005-12-06 | Fuel injection valve for internal combustion chambers |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1834080B1 (en) |
| AT (1) | ATE486212T1 (en) |
| DE (2) | DE102004063165A1 (en) |
| WO (1) | WO2006072521A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018217598A1 (en) * | 2018-10-15 | 2020-04-16 | Continental Automotive Gmbh | Fuel injector and method for producing a nozzle body for a fuel injector |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011007876A1 (en) * | 2011-04-21 | 2012-10-25 | Robert Bosch Gmbh | Component, in particular a fuel injection system, with a surface |
| DE102012206913A1 (en) * | 2012-04-26 | 2013-10-31 | Robert Bosch Gmbh | Fuel injection device and method of making such a device |
| JP6897164B2 (en) * | 2017-03-03 | 2021-06-30 | 株式会社Ihi | Fuel injection valve |
| JP2021050742A (en) * | 2021-01-04 | 2021-04-01 | 株式会社Ihi | Fuel injection valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058810A (en) * | 1988-06-23 | 1991-10-22 | Weber S.R.L. | Fuel metering and atomizing valve for an internal combustion engine fuel supply device |
| DE4200709A1 (en) | 1992-01-14 | 1993-07-15 | Bosch Gmbh Robert | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
| US5924634A (en) * | 1995-03-29 | 1999-07-20 | Robert Bosch Gmbh | Orifice plate, in particular for injection valves, and method for manufacturing an orifice plate |
| DE19951014A1 (en) * | 1999-07-02 | 2001-01-04 | Bosch Gmbh Robert | Fuel injector |
| US20030141387A1 (en) * | 2002-01-31 | 2003-07-31 | Min Xu | Fuel injector nozzle assembly with induced turbulence |
| WO2005042968A1 (en) * | 2003-10-29 | 2005-05-12 | Robert Bosch Gmbh | Fuel injection valve |
| DE102004020175A1 (en) | 2004-04-24 | 2005-11-17 | Robert Bosch Gmbh | Fuel injector for diesel internal combustion engines |
-
2004
- 2004-12-29 DE DE102004063165A patent/DE102004063165A1/en not_active Withdrawn
-
2005
- 2005-12-06 WO PCT/EP2005/056530 patent/WO2006072521A1/en not_active Ceased
- 2005-12-06 EP EP05818956A patent/EP1834080B1/en not_active Expired - Lifetime
- 2005-12-06 DE DE502005010456T patent/DE502005010456D1/en not_active Expired - Lifetime
- 2005-12-06 AT AT05818956T patent/ATE486212T1/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058810A (en) * | 1988-06-23 | 1991-10-22 | Weber S.R.L. | Fuel metering and atomizing valve for an internal combustion engine fuel supply device |
| DE4200709A1 (en) | 1992-01-14 | 1993-07-15 | Bosch Gmbh Robert | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
| US5924634A (en) * | 1995-03-29 | 1999-07-20 | Robert Bosch Gmbh | Orifice plate, in particular for injection valves, and method for manufacturing an orifice plate |
| DE19951014A1 (en) * | 1999-07-02 | 2001-01-04 | Bosch Gmbh Robert | Fuel injector |
| US20030141387A1 (en) * | 2002-01-31 | 2003-07-31 | Min Xu | Fuel injector nozzle assembly with induced turbulence |
| WO2005042968A1 (en) * | 2003-10-29 | 2005-05-12 | Robert Bosch Gmbh | Fuel injection valve |
| DE102004020175A1 (en) | 2004-04-24 | 2005-11-17 | Robert Bosch Gmbh | Fuel injector for diesel internal combustion engines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018217598A1 (en) * | 2018-10-15 | 2020-04-16 | Continental Automotive Gmbh | Fuel injector and method for producing a nozzle body for a fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| DE502005010456D1 (en) | 2010-12-09 |
| EP1834080B1 (en) | 2010-10-27 |
| ATE486212T1 (en) | 2010-11-15 |
| DE102004063165A1 (en) | 2006-07-13 |
| EP1834080A1 (en) | 2007-09-19 |
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