EP0538247B1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- EP0538247B1 EP0538247B1 EP90910107A EP90910107A EP0538247B1 EP 0538247 B1 EP0538247 B1 EP 0538247B1 EP 90910107 A EP90910107 A EP 90910107A EP 90910107 A EP90910107 A EP 90910107A EP 0538247 B1 EP0538247 B1 EP 0538247B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- fuel injection
- fuel
- recess
- injection valve
- 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.)
- Expired - Lifetime
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Classifications
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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
- 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
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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
- 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
- F02M61/1853—Orifice plates
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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
- 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
Definitions
- the invention is based on a fuel injection valve according to the preamble of claim 1.
- a fuel injection valve is already known (DE-A-35 40 660), in which a protective cap is provided which has a through opening in its base downstream of an injection opening.
- the protective cap is intended to prevent damage in the area of the injection opening or a possibly provided needle pin.
- the protective cap is to prevent particles from the vicinity of the fuel injection valve protruding into the intake manifold with its nozzle body being deposited in the area of the injection opening and leading to a narrowing of the injection opening, as a result of which the amount of fuel injected is undesirably reduced, and thus that of the internal combustion engine supplied fuel-air mixture becomes too lean.
- the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that the protective cap not only provides protection against accidental contact and deposits from the outside are avoided, but that fuel deposits due to the successive operating and shutdown phases do not do so even when the internal combustion engine is operating for a longer period of time cause that the amount of fuel metered by the fuel injector is undesirably reduced. This ensures proper operation of the internal combustion engine.
- the design of the protective cap made of plastic is particularly advantageous, which ensures easy manufacture.
- FIG. 1 shows a first exemplary embodiment of a fuel injector designed according to the invention in partial view
- FIG. 2 shows a second exemplary embodiment of a fuel injector designed according to the invention in partial view
- FIG. 3 shows a section along the line III-III in FIG. 2.
- the fuel injection valve shown in partial view in FIG. 1 essentially corresponds to a fuel injection valve for a fuel injection system of a mixture-compressing spark-ignition internal combustion engine described in DE-OS 37 10 467 and is used for fuel injection into the intake manifold of the internal combustion engine.
- a nozzle body 1 is connected to a valve housing (not shown), in which a valve needle 3 is guided in a guide opening 2.
- the guide opening 2 ends in the illustrated nozzle body 1 in a backstitch 5, which is followed by a conical valve seat surface 8 in the flow direction of the fuel.
- a cylindrical transition opening 10 runs between the valve seat surface 8 and a nozzle body end surface 9.
- valve needle 3 In the region of the valve seat surface 8 of the nozzle body 1, the valve needle 3 merges into a conical sealing seat 11 which ends in a cylindrical pin 12. In the closed state of the fuel injection valve, the valve needle with the sealing seat 11 bears on the valve seat surface 8, while in the open state of the fuel injection valve the sealing seat 11 is lifted off the valve seat surface 8 and fuel can flow to the transition opening 10.
- a thin perforated plate 15 is tightly attached to the nozzle body end face 9 by welding in its area covered by the transition opening 10 has at least one injection opening 16 serving for fuel metering, which penetrates the perforated plate and extends inclined with respect to the longitudinal axis 17 of the valve, depending on the type of use the inclinations can run such that the fuel jets emerging from the individual injection openings 16 either into Direction of the longitudinal axis 17 of the valve can be directed inwards or away from the longitudinal axis 17 of the valve.
- the cross section of the injection openings 16 determines the amount of fuel injected per unit of time when the fuel injection valve is open.
- the fuel injector is opened electromagnetically in a manner not shown.
- the injection openings 16 are arranged on the perforated plate 15 such that they emanate from the annular space formed between the pin 12 of the valve needle 3 and the wall of the transition opening 10, the cylindrical pin 12 projecting almost to the perforated plate 15 when the fuel injection valve is closed.
- a cup-shaped protective cap 20 is pushed onto the nozzle body end 4, which partially encompasses the nozzle body 1 in the axial direction with a cylinder jacket 21 and engages with an inwardly directed latching shoulder 22 into an annular groove 23 of the nozzle body 1 to fix the protective cap 20 in position.
- a bottom 24 of the protective cap 20 has a through opening 27 concentric to the longitudinal axis 17 of the valve and extends in the radial direction over the perforated plate 15, whereby it abuts the perforated plate 15 with a contact section 28.
- the bottom 24 extends radially inward to the through opening 27 with an axial distance from the perforated plate 15, so that an annular recess 29 is formed there between the bottom 24 and the perforated plate 15, the internal width of which is compared to the diameter of the through opening 27 is small.
- the protective cap 20 is preferably made of plastic.
- the inside width of the recess 29, that is to say the extent in the direction of the valve longitudinal axis 17, is very small, so that the recess 29 has the shape of an annular gap, which exerts such a large capillary action on fuel in all positions of the fuel injection valve that the fuel present in the recess 29 does not flow out of the passage opening 27 due to its weight.
- the recess 29 can taper or widen with increasing radial extension in the axial direction. If the internal combustion engine is switched off and thus also the fuel injection system, the fuel injection valve is closed and any fuel present in the recess 29 and the passage opening 27 is partially evaporated due to the increased heating of the internal combustion engine, only the components of the fuel evaporating at lower temperatures evaporate, while the components which evaporate at higher temperatures are not sufficiently heated and move radially outwards due to the capillary action of the recess 29, where they are deposited on the wall on the contact section 28, so that the through-opening 27 and the perforated plate 15 in the region of the injection openings 16 remain free of fuel deposits.
- the protective cap 20 of the exemplary embodiment according to FIG. 2 differs from the protective cap of the exemplary embodiment according to FIG. 1 in that no axial distance is formed between the base 24 and the perforated plate 15, but at least one penetrating from the through opening 27 in the radial direction starting from the base 24 Recess 31 is provided, which is slot-shaped in the direction of the cylinder jacket 21. In this case, for example, four recesses 31 can be provided which, as shown in FIG.
- the recesses 31 can widen or taper with increasing radial extension in the circumferential direction.
- four injection openings 16 are shown, each of which a recess 31 has been assigned.
- this configuration is not binding; rather, more than four or fewer than four recesses could also be provided, which can also be in a different association with the injection openings 16.
- the fuel injection valve will close and the fuel located in the passage opening 27 and the recesses 31 will migrate radially outward into the recesses 31 and at least those will be higher due to the capillary action boiling constituents of the fuel remain so that no fuel deposits occur at the injection openings 16 and in the passage opening 27.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Die Erfindung geht aus von einem Kraftstoffeinspritzventil nach der Gattung des Patentanspruchs 1. Es ist schon ein Kraftstoffeinspritzventil bekannt (DE-A-35 40 660), bei dem eine Schutzkappe vorgesehen ist, die stromabwärts einer Einspritzöffnung in ihrem Boden eine Durchgangsöffnung aufweist. Die Schutzkappe soll Beschädigungen im Bereich der Einspritzöffnung bzw. eines eventuell vorgesehenen Nadelnapfens verhindern. Außerdem soll durch die Schutzkappe vermieden werden, daß Partikel aus der Umgebung des mit seinem Düsenkörper in das Saugrohr ragenden Kraftstoffeinspritzventiles sich im Bereich der Einspritzöffnung ablagern und zu einer Verengung der Einspritzöffnung führen, wodurch sich die eingespritzte Kraftstoffmenge in unerwünschter Weise verringert und damit das der Brennkraftmaschine zugeführte Kraftstoff-Luft-Gemisch zu mager wird. Bei der Verwendung der bekannten Schutzkappe ergibt sich jedoch der Effekt, daß nach dem Abstellen der Brennkraftmaschine und dem Schließen des Kraftstoffeinspritzventiles sich in der Durchgangsöffnung der Schutzkappe befindlicher, meist in Filmform vorliegender Kraftstoff infolge der nun noch verstärkten Erwärmung des Motorraumes wegen der fehlenden Kühlung verdampft. Dabei verdampfen jedoch in aller Regel nur die niedrig siedenden Bestandteile des Kraftstoffes, während die erst bei höheren Temperaturen siedenden Bestandteilen des Kraftstoffes in der Durchgangsöffnung der Schutzkappe verbleiben und somit nachteilig während der Betriebszeit des Kraftstoffeinspritzventiles nach einer Reihe von Betriebs- und Abstellphasen der Brennkraftmaschine zu Ablagerungen in dem Bereich der wenigstens einen Einspritzöffnung führen, so daß sich das Einspritzverhalten verschlechtert und die Brennkraftmaschine zu einem unrunden Lauf neigt.The invention is based on a fuel injection valve according to the preamble of claim 1. A fuel injection valve is already known (DE-A-35 40 660), in which a protective cap is provided which has a through opening in its base downstream of an injection opening. The protective cap is intended to prevent damage in the area of the injection opening or a possibly provided needle pin. In addition, the protective cap is to prevent particles from the vicinity of the fuel injection valve protruding into the intake manifold with its nozzle body being deposited in the area of the injection opening and leading to a narrowing of the injection opening, as a result of which the amount of fuel injected is undesirably reduced, and thus that of the internal combustion engine supplied fuel-air mixture becomes too lean. When using the known protective cap, however, there is the effect that after the internal combustion engine is switched off and the fuel injection valve is closed, fuel in the through opening of the protective cap, mostly in film form, evaporates due to the increased heating of the engine compartment due to the lack of cooling. Evaporate however, as a rule only the low-boiling components of the fuel, while the components of the fuel which only boil at higher temperatures remain in the through opening of the protective cap and are therefore disadvantageous during the operating time of the fuel injector after a series of operating and shutdown phases of the internal combustion engine to form deposits in the Guide the area of the at least one injection opening so that the injection behavior deteriorates and the internal combustion engine tends to run out of round.
Bekannt ist ebenfalls ein Kraftstoffeinspritzventil nach der DE-A-30 12 416, bei dem stromabwärts einer Einspritzöffnung wenigstens ein in axialer Richtung wirkender Kapillarkanal vorgesehen ist, bei dem die Gefahr besteht, daß sich höher siedende Bestandteile des Kraftstoffes darin ablagern.Also known is a fuel injection valve according to DE-A-30 12 416, in which at least one capillary channel acting in the axial direction is provided downstream of an injection opening and in which there is a risk that higher-boiling components of the fuel will be deposited therein.
Das erfindungsgemäße Kraftstoffeinspritzventil mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vorteil, daß durch die Schutzkappe nicht nur ein Berührschutz gegeben ist und Ablagerungen von außen vermieden werden, sondern daß auch bei längerer Betriebsdauer der Brennkraftmaschine Kraftstoffablagerungen infolge der aufeinanderfolgenden Betriebs- und Abstellphasen nicht dazu führen, daß die vom Kraftstoffeinspritzventil zugemessene Kraftstoffmenge in unerwünschte Weise verringert wird. Hierdurch wird ein ordnungsgemäßer Betrieb der Brennkraftmaschine gewährleistet.The fuel injector according to the invention with the characterizing features of claim 1 has the advantage that the protective cap not only provides protection against accidental contact and deposits from the outside are avoided, but that fuel deposits due to the successive operating and shutdown phases do not do so even when the internal combustion engine is operating for a longer period of time cause that the amount of fuel metered by the fuel injector is undesirably reduced. This ensures proper operation of the internal combustion engine.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Patentanspruch 1 angegebenen Kraftstoffeinspritzventiles möglich.The measures listed in the dependent claims allow advantageous developments and improvements of the fuel injector specified in claim 1.
Besonders vorteilhaft ist die Ausgestaltung der Schutzkappe aus Kunststoff, wodurch eine leichte Herstellbarkeit gewährleistet ist.The design of the protective cap made of plastic is particularly advantageous, which ensures easy manufacture.
Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein erstes Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Kraftstoffeinspritzventiles in Teilansicht, Figur 2 ein zweites Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Kraftstoffeinspritzventiles in Teilansicht, Figur 3 einen Schnitt entlang der Linie III-III in Figur 2.Two embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. 1 shows a first exemplary embodiment of a fuel injector designed according to the invention in partial view, FIG. 2 shows a second exemplary embodiment of a fuel injector designed according to the invention in partial view, FIG. 3 shows a section along the line III-III in FIG. 2.
Das in der Figur 1 in Teilansicht dargestellte Kraftstoffeinspritzventil stimmt im wesentlichen mit einem in der DE-OS 37 10 467 beschriebenen Kraftstoffeinspritzventil für eine Kraftstoffeinspritzanlage einer gemischverdichtenden fremdgezündeten Brennkraftmaschine überein und dient zur Kraftstoffeinspritzung in das Saugrohr der Brennkraftmaschine. Mit einem nicht dargestellten Ventilgehäuse ist ein Düsenkörper 1 verbunden, in dem in einer Führungsöffnung 2 eine Ventilnadel 3 geführt ist. Die Führungsöffnung 2 endet bei dem dargestellten Düsenkörper 1 in einem Hinterstich 5, an den sich in Strömungsrichtung des Kraftstoffes eine konisch ausgebildete Ventilsitzfläche 8 anschließt. Zwischen der Ventilsitzfläche 8 und einer Düsenkörperstirnfläche 9 verläuft eine zylindrische Übergangsöffnung 10. Die Ventilnadel 3 geht im Bereich der Ventilsitzfläche 8 des Düsenkörpers 1 in einen konischen Dichtsitz 11 über, der in einen zylindrischen Zapfen 12 ausläuft. Im geschlossenen Zustand des Kraftstoffeinspritzventiles liegt die Ventilnadel mit dem Dichtsitz 11 an der Ventilsitzfläche 8 an, während im geöffnetem Zustand des Kraftstoffeinspritzventiles der Dichtsitz 11 von der Ventilsitzfläche 8 abgehoben ist und Kraftstoff zur Übergangsöffnung 10 strömen kann. An der Düsenkörperstirnfläche 9 ist eine dünne Lochplatte 15 durch Schweißen dicht befestigt, die in ihrem durch die Übergangsöffnung 10 überdeckten Bereich wenigstens eine der Kraftstoffzumessung dienende Einspritzöffnung 16 hat, die die Lochplatte durchdringt und gegenüber der Ventillängsachse 17 geneigt verläuft, wobei je nach Verwendungsart die Neigungen so verlaufen können, daß die aus den einzelnen Einspritzöffnungen 16 austretenden Kraftstoffstrahlen entweder in Richtung der Ventillängsachse 17 nach innen oder von der Ventillängsachse 17 weg nach außen gerichtet sein können. Durch den Querschnitt der Einspritzöffnungen 16 wird die bei geöffnetem Kraftstoffeinspritzventil pro Zeiteinheit eingespritzte Kraftstoffmenge bestimmt. Die Öffnung des Kraftstoffeinspritzventiles erfolgt in nicht dargestellter Weise elektromagnetisch. Die Einspritzöffnungen 16 sind so an der Lochplatte 15 angeordnet, daß sie von dem zwischen dem Zapfen 12 der Ventilnadel 3 und der Wandung der Übergangsöffnung 10 gebildeten Ringraum ausgehen, wobei bei geschlossenem Kraftstoffeinspritzventil der zylindrische Zapfen 12 bis nahezu an die Lochplatte 15 ragt.The fuel injection valve shown in partial view in FIG. 1 essentially corresponds to a fuel injection valve for a fuel injection system of a mixture-compressing spark-ignition internal combustion engine described in DE-OS 37 10 467 and is used for fuel injection into the intake manifold of the internal combustion engine. A nozzle body 1 is connected to a valve housing (not shown), in which a valve needle 3 is guided in a
Auf das Düsenkörperende 4 ist eine topfförmig ausgebildete Schutzkappe 20 aufgeschoben, die mit einem Zylindermantel 21 den Düsenkörper 1 in axialer Richtung teilweise umgreift und mit einem nach innen gerichteten Rastabsatz 22 in eine Ringnut 23 des Düsenkörpers 1 zur Lagefixierung der Schutzkappe 20 eingreift. Ein Boden 24 der Schutzkappe 20 weist konzentrisch zur Ventillängsachse 17 eine Durchgangsöffnung 27 auf und erstreckt sich in radialer Richtung über die Lochplatte 15, wobei er mit einem Anlageabschnitt 28 an der Lochplatte 15 anliegt. Von dem Anlageabschnitt 28 ausgehend verläuft der Boden 24 radial nach innen bis zur Durchgangsöffnung 27 mit einem axialen Abstand zur Lochplatte 15, so daß dort zwischen dem Boden 24 und der Lochplatte 15 eine ringförmige Ausnehmung 29 gebildet wird, deren Lichte Weite gegenüber dem Durchmesser der Durchgangsöffnung 27 klein ist. Vorzugsweise ist die Schutzkappe 20 aus Kunststoff gefertigt. Die Lichte Weite der Ausnehmung 29, also die Ausdehnung in Richtung der Ventillängsachse 17 ist sehr klein, so daß die Ausnehmung 29 die Form eines Ringspaltes hat, der in allen Stellungen des Kraftstoffeinspritzventiles eine so große Kapillarwirkung auf Kraftstoff ausübt, daß der in der Ausnehmung 29 vorhandene Kraftstoff nicht aufgrund seines Gewichtes aus der Durchgangsöffnung 27 abströmt. Dabei kann sich die Ausnehmung 29 ausgehend von der Durchgangsöffnung 27 mit zunehmender radialer Erstreckung in axialer Richtung verjüngen oder verbreitern. Wird nun die Brennkraftmaschine abgestellt und damit auch die Kraftstoffeinspritzanlage, so wird das Kraftstoffeinspritzventil geschlossen und eventuell in der Ausnehmung 29 und der Durchgangsöffnung 27 vorhandener Kraftstoff aufgrund der stärkeren Erwärmung der Brennkraftmaschine teilweise verdampft, wobei lediglich die bei niedrigeren Temperaturen verdampfenden Bestandteile des Kraftstoffes sich verflüchtigen, während die bei höheren Temperaturen verdampfenden Bestandteile nicht ausreichend erwärmt werden und sich durch die Kapillarwirkung der Ausnehmung 29 in radialer Richtung nach außen bewegen, wo sie sich an der Wandung am Anlageabschnitt 28 ablagern, so daß die Durchgangsöffnung 27 und die Lochplatte 15 im Bereich der Einspritzöffnungen 16 frei von Kraftstoffablagerungen bleiben.A cup-shaped
Bei den in den Figuren 2 und 3 dargestellten zweiten Ausführungsbeispiel des Kraftstoffeinspritzventiles sind die gegenüber dem ersten Ausführungsbeispiel nach Figur 1 gleichbleibenden und gleichwirkenden Teile durch die gleichen Bezugszeichen gekennzeichnet, so daß insoweit auch hierfür die Beschreibung dieser Teile nach Figur 1 gilt. Die Schutzkappe 20 des Ausführungsbeispieles nach Figur 2 unterscheidet sich von der Schutzkappe des Ausfübrungsbeispieles nach Figur 1 dadurch, daß zwischen dem Boden 24 und der Lochplatte 15 kein axialer Abstand gebildet wird, sondern von der Durchgangsöffnung 27 ausgehend in radialer Richtung den Boden 24 durchdringend wenigstens eine Ausnehmung 31 vorgesehen ist, die schlitzförmig ausgebildet in Richtung zum Zylindermantel 21 verlaufen. Dabei können beispielsweise vier Ausnehmungen 31 vorgesehen sein, die, wie in Figur 3 gezeigt ist, in Umfangsrichtung zueinander gleichen Abstand haben können und deren in Umfangsrichtung gemessene Lichte Weite eine Kapillarwirkung auf den Kraftstoff in jeder Stellung des Kraftstoffeinspritzventiles ausübend klein im Vergleich zum Durchmesser der Durchgangsöffnung 27 ist. Die Ausnehmungen 31 können sich dabei mit zunehmender radialer Erstreckung in Umfangsrichtung verbreitern oder verjüngen. In Figur 3 sind beispielsweise vier Einspritzöffnungen 16 dargestellt, denen jeweils eine Ausnehmung 31 zugeordnet wurde. Diese Ausgestaltung ist jedoch nicht bindend, vielmehr könnten genauso gut mehr als vier oder weniger als vier Ausnehmungen vorgesehen sein, die auch in anderer Zuordnung zu den Einspritzöffnungen 16 liegen können.In the second exemplary embodiment of the fuel injection valve shown in FIGS. 2 and 3, the parts that remain the same and have the same effect as in the first exemplary embodiment according to FIG. 1 are identified by the same reference numerals, so that the description of these parts according to FIG. 1 also applies in this respect. The
Wie bereits zu Figur 1 beschrieben wurde, wird bei einem Abstellen der Brennkraftmaschine und der Kraftstoffeinspritzanlage das Kraftstoffeinspritzventil schließen und der sich in der Durchgangsöffnung 27 und den Ausnehmungen 31 befindliche Kraftstoff radial nach außen in die Ausnehmungen 31 wandern und dort werden aufgrund der Kapillarwirkung zumindest die höher siedenden Bestandteile des Kraftstoffes verbleiben, so daß an den Einspritzöffnungen 16 und in der Durchgangsöffnung 27 keine Kraftstoffablagerungen auftreten.As has already been described with reference to FIG. 1, when the internal combustion engine and the fuel injection system are switched off, the fuel injection valve will close and the fuel located in the passage opening 27 and the
Claims (9)
- Fuel injection valve with a nozzle element (1) to which a pot-shaped protective cap (20) with a floor (24) is attached, said floor (24) having a through opening (27) which is opened towards at least one injection opening (16), characterized in that, on the protective cap (20) in the direct vicinity of the at least one injection opening (16), at least one recess (29, 31) is provided which exerts a capillary effect outwards in the recess (29, 31) in the radial direction on the sprayed-out fuel.
- Fuel injection valve according to Claim 1, characterized in that the at least one recess (29) is open towards the through opening (27) and, extending radially outwards, is covered by the floor (24) of the protective cap (20).
- Fuel injection valve according to Claim 2, characterized in that the recess (29) is annular.
- Fuel injection valve according to Claim 3, characterized in that starting from the through opening (27) the recess (29) tapers or widens with increasing radial extent in the axial direction.
- Fuel injection valve according to Claim 1, characterized in that the at least one recess (31) is open towards the through opening (27) and, extending radially outwards, penetrates the floor (24) in the axial direction.
- Fuel injection valve according to Claim 5, characterized in that the at least one recess (31) is slot-shaped.
- Fuel injection valve according to Claim 6, characterized in that starting from the through opening (27) the at least one recess (31) widens or tapers with increasing radial extent in the circumferential direction.
- Fuel injection valve according to one of the preceding claims, characterized in that the internal width of the at least one recess (29, 31) is small in comparison with the diameter of the through opening (27) of the protective cap (20).
- Fuel injection valve according to one of the preceding claims, characterized in that the protective cap (20) is produced from plastic.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3927390 | 1989-08-19 | ||
| DE3927390A DE3927390A1 (en) | 1989-08-19 | 1989-08-19 | FUEL INJECTION VALVE |
| PCT/DE1990/000518 WO1991002898A1 (en) | 1989-08-19 | 1990-07-11 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0538247A1 EP0538247A1 (en) | 1993-04-28 |
| EP0538247B1 true EP0538247B1 (en) | 1995-01-11 |
Family
ID=6387423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90910107A Expired - Lifetime EP0538247B1 (en) | 1989-08-19 | 1990-07-11 | Fuel injection valve |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5193747A (en) |
| EP (1) | EP0538247B1 (en) |
| JP (1) | JP2837270B2 (en) |
| KR (1) | KR0167114B1 (en) |
| DE (2) | DE3927390A1 (en) |
| ES (1) | ES2067034T3 (en) |
| WO (1) | WO1991002898A1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0503757B1 (en) * | 1991-03-08 | 1995-03-22 | Ford Motor Company Limited | Fuel injector with a silicon nozzle |
| US5350119A (en) * | 1993-06-01 | 1994-09-27 | Siemens Automotive L.P. | Clad metal orifice disk for fuel injectors |
| JP3440534B2 (en) * | 1994-03-03 | 2003-08-25 | 株式会社デンソー | Fluid injection nozzle |
| JPH0842428A (en) * | 1994-07-29 | 1996-02-13 | Zexel Corp | Impact type fuel injection nozzle and manufacture thereof |
| DE19522284B4 (en) * | 1995-06-20 | 2007-05-10 | Robert Bosch Gmbh | Fuel injector |
| JP3134813B2 (en) * | 1997-06-20 | 2001-02-13 | トヨタ自動車株式会社 | Fuel injection valve for internal combustion engine |
| DE19927898A1 (en) | 1999-06-18 | 2000-12-21 | Bosch Gmbh Robert | Fuel injection valve comprises a layer of material which is located on the outer surface of the valve body and ensures a hydraulically tight joint between the valve seat body and its carrier structure |
| KR100618069B1 (en) * | 1999-11-08 | 2006-08-29 | 에스케이 주식회사 | Improved Hollow-cone Spray Injector for Internal Conbustion Engine |
| JP2002130087A (en) | 2000-10-23 | 2002-05-09 | Toyota Motor Corp | Fuel injection valve for cylinder injection type internal combustion engine |
| DE10130685A1 (en) | 2001-06-26 | 2003-01-02 | Bosch Gmbh Robert | Fuel injector |
| DE10142299A1 (en) * | 2001-08-29 | 2003-04-17 | Bosch Gmbh Robert | fuel injection system |
| DE10142974B4 (en) * | 2001-09-01 | 2010-04-29 | Robert Bosch Gmbh | Fuel injector |
| JP3969247B2 (en) * | 2001-11-06 | 2007-09-05 | 株式会社デンソー | Fuel injection valve |
| DE10321148A1 (en) * | 2003-05-12 | 2004-12-02 | Robert Bosch Gmbh | Fuel injector |
| US20060010886A1 (en) * | 2004-07-14 | 2006-01-19 | Clamage Eric D | Liquid cryogen dosing system with nozzle for pressurizing and inerting containers |
| CN1854503B (en) * | 2005-04-18 | 2012-07-04 | 株式会社电装 | Injection valve with nozzle hole |
| US7828232B2 (en) * | 2005-04-18 | 2010-11-09 | Denso Corporation | Injection valve having nozzle hole |
| JP4505824B2 (en) * | 2005-04-18 | 2010-07-21 | 株式会社デンソー | Fuel injection valve |
| KR100718253B1 (en) * | 2005-08-17 | 2007-05-16 | 삼성전자주식회사 | Method of manufacturing a non-volatile memory device |
| JP2007146828A (en) * | 2005-10-28 | 2007-06-14 | Hitachi Ltd | Fuel injection valve |
| US20160237968A1 (en) * | 2013-09-26 | 2016-08-18 | Enplas Corporation | Attachment structure of fuel injection device nozzle plate |
| US10641223B2 (en) * | 2013-10-01 | 2020-05-05 | Enplas Corporation | Attachment structure of fuel injection device nozzle plate |
| DE102015206854A1 (en) * | 2014-07-10 | 2016-01-14 | Continental Teves Ag & Co. Ohg | Valve seat carrier |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2121948A (en) * | 1935-05-11 | 1938-06-28 | Western Electric Co | Burner |
| GB1283205A (en) * | 1969-09-30 | 1972-07-26 | Griffiths Fuel Injection Dev L | Improvements relating to fuel injection apparatus for internal combustion engines |
| US4057190A (en) * | 1976-06-17 | 1977-11-08 | Bendix Corporation | Fuel break-up disc for injection valve |
| DE2900176A1 (en) * | 1979-01-04 | 1980-07-24 | Bosch Gmbh Robert | INJECTION VALVE FOR FUEL INJECTION SYSTEMS |
| DE3012416A1 (en) * | 1980-03-29 | 1981-10-15 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel-injection valve with capillary channel - which prevents gas reaching metering point and forming deposits reducing cross=section |
| JPS58143163A (en) * | 1982-02-17 | 1983-08-25 | Isuzu Motors Ltd | Fuel injection nozzle for engine |
| DE3540660A1 (en) * | 1985-11-16 | 1987-05-21 | Bosch Gmbh Robert | Solenoid-operatable fuel injection valve |
| DE8632002U1 (en) * | 1986-11-28 | 1988-03-31 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
| DE8802464U1 (en) * | 1988-02-25 | 1989-06-22 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
| KR930004967B1 (en) * | 1988-07-13 | 1993-06-11 | 가부시기가이샤 히다찌세이사꾸쇼 | Electronic fuel injector |
-
1989
- 1989-08-19 DE DE3927390A patent/DE3927390A1/en not_active Withdrawn
-
1990
- 1990-07-11 US US07/671,901 patent/US5193747A/en not_active Expired - Lifetime
- 1990-07-11 EP EP90910107A patent/EP0538247B1/en not_active Expired - Lifetime
- 1990-07-11 WO PCT/DE1990/000518 patent/WO1991002898A1/en active IP Right Grant
- 1990-07-11 DE DE59008272T patent/DE59008272D1/en not_active Expired - Lifetime
- 1990-07-11 JP JP2509357A patent/JP2837270B2/en not_active Expired - Fee Related
- 1990-07-11 ES ES90910107T patent/ES2067034T3/en not_active Expired - Lifetime
- 1990-07-11 KR KR1019910700272A patent/KR0167114B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR920701665A (en) | 1992-08-12 |
| WO1991002898A1 (en) | 1991-03-07 |
| EP0538247A1 (en) | 1993-04-28 |
| US5193747A (en) | 1993-03-16 |
| DE3927390A1 (en) | 1991-02-21 |
| DE59008272D1 (en) | 1995-02-23 |
| KR0167114B1 (en) | 1998-12-15 |
| JP2837270B2 (en) | 1998-12-14 |
| ES2067034T3 (en) | 1995-03-16 |
| JPH04501296A (en) | 1992-03-05 |
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