EP1303696B1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- EP1303696B1 EP1303696B1 EP01953881A EP01953881A EP1303696B1 EP 1303696 B1 EP1303696 B1 EP 1303696B1 EP 01953881 A EP01953881 A EP 01953881A EP 01953881 A EP01953881 A EP 01953881A EP 1303696 B1 EP1303696 B1 EP 1303696B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray
- valve
- fuel injection
- injection valve
- discharge openings
- 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
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
-
- 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
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/047—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices
Definitions
- the invention is based on a fuel injector according to the genus of the main claim.
- DE 32 28 079 A1 describes a fuel injector known that has two valve needles and through this can control several spray orifices separately.
- the Valve needles are each countered by a spring one sealing seat each with a preload force applied. If the one valve needle by a certain The forward stroke is lifted out of its sealing seat, so it hits against a stop on the other valve needle and takes at another stroke with this valve needle.
- the two sealing seats of the two valve needles close different Spray orifices at different angles can be aligned.
- the structure is multi-part, and two sealing seats have to be manufactured precisely, which creates high costs.
- valve needle acts as on its combustion chamber side Valve closing body trained section with a Valve seat surface together to form a sealing seat, the Separates spray bores from a fuel feed.
- valve needle guided auxiliary also has one Valve closing body with a second Valve seat surface of the fuel injector interacts.
- the fuel injector according to the invention with the characteristic features of claim 1 has in contrast the advantage of an inexpensive and technically good Solution to be implemented for groups of Spray orifices to offer as the wider group of No more spray openings for their separate opening requires a precisely manufactured sealing seat.
- the angle at which the fuel is distributed in the spray pattern of the fuel injector, in Dependent on the valve stroke can be changed.
- a first can be advantageous by tongues of the plate spring Bolt circle from spray openings are covered. Further Spray openings can in particular be different Have spray angle and one another circumferential angle. So can be advantageous at low injection quantity and load of the internal combustion engine initially only a certain number of spray orifices be opened, the narrow spray angle of the Spray openings, so that a Fuel injection jet consists of Jets of fuel, one overall has narrow angles. At higher loads the Internal combustion engine and corresponding requirements in Stratified charge operation of one operated with a lean mix concept Internal combustion engine are also the spray openings of the open further bolt circle. These can be done in one larger spray angle can be arranged. The Fuel injection jet, which is injected as a whole, is delivered at a larger angle.
- Fig. 1 shows a section in a cut Representation of the section of an inventive Fuel injector, the not shown here Combustion chamber facing an internal combustion engine.
- a valve body 1 is provided with an injection orifice plate 2, has the spray openings 4, via a weld seam 3 connected and forms together with this one Valve seat body 22.
- a valve needle 5 has the End not shown combustion chamber facing one Valve closing body 6. This valve closing body 6 is connected to the valve needle 5 via a weld 7.
- the Valve closing body 6 interacts with one in valve body 1 provided z.
- B. frustoconical valve seat 8 a sealing seat 9 together.
- Fig. 1 shows the fuel injector in the closed Status.
- the plate spring 13 is through, the pressure element 11 flat compared to their shape in the unloaded state pressed, and the tongues 14 overlap under the tongues 14 arranged outer spray openings 15.
- the pressure element 11 has a collar 16 which serves as a stop.
- the valve closing body 6 connected to the valve needle 5 by the weld 7 forms the step 17 serving as a counterstop in the recess 10. After a partial stroke h 1 of the valve needle 5, the collar 16 and step 17 come to lie against one another.
- the collar 16 lies on the Gradation 17 and the pressure element 11 is of the Valve needle 5 taken away.
- the plate spring 13 On the valve seat body 22, in Embodiment on the spray hole plate 2 is the plate spring 13.
- the pressure element 11 is opposite closed state of the fuel injector as he is shown in Fig. 1, from the valve needle 5 via the Bund 16 and the gradation 17 adjacent to the Bund 16 the spray hole plate 2 is lifted and exercises on the Tongues 14 of the plate spring 13 no force.
- the Disc spring 13 therefore takes their bias appropriate form and gives the under the tongues 14th arranged, so far covered by the tongues 14 Spray openings 15 free.
- Fig. 3 shows the section plane III-III of Fig. 1.
- the spray openings 4 and a central spray opening 18 and that of the tongues 14 the plate spring 13 covered spray openings 15 arranged, which is covered by the tongues 14 in supervision are and are therefore indicated by dashed lines.
- This covered spray openings 15 are in a first outer bolt circle 19 arranged, the middle
- the circumferential line is drawn with a broken line.
- They don't covered spray openings 4 are in a second inner bolt circle 20 arranged, the middle Circumferential line is also shown in dashed lines.
- the Belleville spring 13 is in the compressed state, corresponding to a completely closed one Fuel injector, shown. Then they all lie Tongues 14 on the spray hole plate 2.
- valve needle 5 is not here shown actuator (electromagnetic, piezoelectric or magnetostrictive) from the sealing seat 9, so the Fuel feed to the spray openings 4 and central spray opening 18 released, however, the covered by the tongues 14 of the plate spring 13 Spray openings 15 are still closed.
- the Pressure element 11 presses the tongues 14 against the Spray hole plate 2 and closes the covered Spray openings 15.
- the angle of a fuel injection cone as a whole advantageously enables a Fuel injector a high switching frequency; by the low moving masses is a quick response guaranteed.
- the embodiment of the invention is also to implement inexpensively.
- the plate spring 13 so shaped that not only by suitable surfaces Spray openings of the first bolt circle 19, but also Spray openings of the second bolt circle 20 covered and the discharge openings 4.15 of the releases different bolt circles 19, 20 in succession, by parts of the plate spring 13 from the bolt circle 20 arch up with less relief than from Spray openings of the other bolt circle 19, the other parts of the plate spring 13 are covered.
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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)
Description
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention is based on a fuel injector according to the genus of the main claim.
Aus der DE 32 28 079 A1 ist ein Brennstoffeinspritzventil bekannt, das zwei Ventilnadeln aufweist und durch diese mehrere Abspritzöffnungen getrennt steuern kann. Die Ventilnadeln werden dabei von jeweils einer Feder gegen jeweils einen Dichtsitz mit einer Vorspannungskraft beaufschlagt. Wird die eine Ventilnadel um einen gewissen Vorhub aus ihrem Dichtsitz angehoben, so schlägt sie gegen einen Anschlag der anderen Ventilnadel an und nimmt beim weiteren Hub diese Ventilnadel mit. Die beiden Dichtsitze der beiden Ventilnadeln verschließen unterschiedliche Abspritzöffnungen, die unter unterschiedlichen Winkeln ausgerichtet sein können. Jedoch ist der Aufbau vielteilig, und es müssen zwei Dichtsitze präzise hergestellt werden, wodurch hohe Kosten entstehen.DE 32 28 079 A1 describes a fuel injector known that has two valve needles and through this can control several spray orifices separately. The Valve needles are each countered by a spring one sealing seat each with a preload force applied. If the one valve needle by a certain The forward stroke is lifted out of its sealing seat, so it hits against a stop on the other valve needle and takes at another stroke with this valve needle. The two sealing seats of the two valve needles close different Spray orifices at different angles can be aligned. However, the structure is multi-part, and two sealing seats have to be manufactured precisely, which creates high costs.
Aus der DE 30 48 304 A1 ist ein Brennstoffeinspritzventil für Brennkraftmaschinen mit einer Ventilnadel und einer Hilfsnadel in einer Bohrung der Ventilnadel bekannt. Die Ventilnadel wirkt an ihrem brennraumseitig als Ventilschließkörper ausgebildeten Abschnitt mit einer Ventilsitzfläche zu einem Dichtsitz zusammen, der Abspritzbohrungen von einem Brennstoffzulauf trennt. Die in der Ventilnadel geführte Hilfsnadel weist ebenfalls einen Ventilschließkörper auf, der mit einer zweiten Ventilsitzfläche des Brennstoffeinspritzventils zusammenwirkt. Durch eine in der Ventilnadel gelegene Feder wird die Hilfsnadel gegen die Ventilnadel gezogen, zu der hin sie ebenfalls mit einer Ventilsitzfläche in der Ventilnadel einen Dichtsitz bildet. Wenn das hydraulisch betätigte Brennstoffeinspritzventil durch Anstieg des Druckes, in der Brennstoffzuleitung zu öffnen beginnt, so wird die Hilfsnadel aus ihrem Dichtsitz in der Ventilnadel gegen den Dichtsitz im Ventilkörper gedrückt und verschließt eine Gruppe von Abspritzbohrungen, während eine weitere Gruppe von Abspritzbohrungen geöffnet ist. Steigt der Druck weiter an, so wird die Ventilnadel von ihrem Dichtsitz abgehoben und nimmt nach einem bestimmten Hub die Hilfsnadel mit, die gegen einen Anschlag der Ventilnadel anschlägt. Alle Abspritzbohrungen werden dann freigegeben. Nachteilig ist, daß insgesamt drei präzise zu fertigende Dichtsitze erforderlich sind.DE 30 48 304 A1 describes a fuel injection valve for internal combustion engines with one valve needle and one Auxiliary needle in a bore of the valve needle known. The Valve needle acts as on its combustion chamber side Valve closing body trained section with a Valve seat surface together to form a sealing seat, the Separates spray bores from a fuel feed. In the the valve needle guided auxiliary also has one Valve closing body with a second Valve seat surface of the fuel injector interacts. By a spring located in the valve needle the auxiliary needle is pulled against the valve needle to which hin also with a valve seat in the Valve needle forms a sealing seat. If that's hydraulic actuated fuel injector by increasing the Pressure in the fuel supply line begins to open, so the auxiliary needle is removed from its sealing seat in the valve needle pressed against the sealing seat in the valve body and closes one group of spray bores while another Group of spray bores is open. The pressure increases further on, the valve needle will come out of its sealing seat lifted and takes the auxiliary needle after a certain stroke with which strikes against a stop of the valve needle. All spray bores are then released. adversely is that a total of three precisely fitting sealing seats required are.
Aus der DE 31 20 044 C2 ist ebenfalls ein Brennstoffeinspritzventil mit zwei Ventilnadeln bekannt, mit dem Abspritzöffnungen in zwei Gruppen geöffnet werden können. Dabei wird die eine Ventilnadel im Inneren der anderen, als Hohlnadel ausgebildeten Ventilnadel geführt. Diese als Hohlnadel ausgebildete Ventilnadel weist an ihrem brennraumseitigen Ende Abspritzbohrungen auf. Nachteilig ist, daß die Hohlnadel sehr aufwendig zu fertigen ist, da sie auch Abspritzbohrungen aufweist und somit an einem Bauteil zwei Funktionen, die jeweils eine präzise Herstellung des Bauteils erfordern, vereint sind.From DE 31 20 044 C2 is also a Fuel injector known with two valve needles, with spray openings are opened in two groups can. The one valve needle inside the other valve needle designed as a hollow needle. This valve needle, which is designed as a hollow needle, has on it Spray bores on the combustion chamber end. adversely is that the hollow needle is very expensive to manufacture because it also has spray bores and thus on one Component two functions, each one precise Require manufacture of the component, are united.
Das erfindungsgemäße Brennstoffeinspritzventil mit den
kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber
den Vorteil, eine kostengünstige und fertigungstechnisch gut
umzusetzende Lösung für nacheinander zu öffnende Gruppen von
Abspritzöffnungen zu bieten, da die weitere Gruppe von
Abspritzöffnungen zu ihrem getrennten Öffnen keinen weiteren
präzise zu fertigenden Dichtsitz erfordert.The fuel injector according to the invention with the
characteristic features of
Insbesondere kann der Winkel, unter dem sich der Brennstoff im Strahlbild des Brennstoffeinspritzventils verteilt, in Abhängigkeit von dem Ventilhub verändert werden.In particular, the angle at which the fuel is distributed in the spray pattern of the fuel injector, in Dependent on the valve stroke can be changed.
Durch die in den Uriteransprüchen angegebenen Maßnahmen sind
vorteilhafte Weiterbildungen und Verbesserungen des in
Anspruch 1 angegebenen Brennstoffeinspritzventils möglich.By the measures specified in the Uriter claims
advantageous developments and improvements in
Vorteilhaft kann durch Zungen der Tellerfeder ein erster Lochkreis aus Abspritzöffnungen überdeckt werden. Weitere Abspritzöffnungen können insbesondere verschiedene Abspritzwinkel aufweisen und zueinander um einen umfänglichen Winkel versetzt sein. Vorteilhaft kann so bei geringer Einspritzmenge und Last der Brennkraftmaschine zunächst nur eine bestimmte Anzahl Abspritzöffnungen geöffnet werden, die einen engen Abspritzwinkel der Abspritzöffnungen aufweist, so daß sich ein Brennstoffeinspritzstrahl bildet, bestehend aus Brennstoffstrahlen der Abspritzöffnungen, der einen insgesamt engen Winkel aufweist. Bei höherer Last der Brennkraftmaschine und entsprechenden Erfordernissen im Schichtladebetrieb einer mit Magermixkonzept betriebenen Brennkraftmaschine werden auch die Abspritzöffnungen des weiteren Lochkreises geöffnet. Diese können in einem größerem Abspritzwinkel angeordnet sein. Der Brennstoffeinspritzstrahl, der insgesamt eingespritzt wird, wird unter einem größeren Winkel abgegeben.A first can be advantageous by tongues of the plate spring Bolt circle from spray openings are covered. Further Spray openings can in particular be different Have spray angle and one another circumferential angle. So can be advantageous at low injection quantity and load of the internal combustion engine initially only a certain number of spray orifices be opened, the narrow spray angle of the Spray openings, so that a Fuel injection jet consists of Jets of fuel, one overall has narrow angles. At higher loads the Internal combustion engine and corresponding requirements in Stratified charge operation of one operated with a lean mix concept Internal combustion engine are also the spray openings of the open further bolt circle. These can be done in one larger spray angle can be arranged. The Fuel injection jet, which is injected as a whole, is delivered at a larger angle.
Ein erfindungsgemäßes Ausführungsbeispiel eines Brennstoffeinspritzventils ist in den Zeichnungen vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:
- Fig. 1
- einen Ausschnitt aus einem Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils in einer geschnittenen Darstellung im unbetätigten Zustand,
- Fig. 2
- einen Ausschnitt aus dem Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils entsprechend Fig. 1 in einer geschnittenen Darstellung im betätigten Zustand und
- Fig. 3
- die Schnittebene III-III in Fig. 1 in Aufsicht.
- Fig. 1
- a section of an embodiment of a fuel injector according to the invention in a sectional view in the unactuated state,
- Fig. 2
- a section of the embodiment of a fuel injector according to the invention corresponding to FIG. 1 in a sectional view in the actuated state and
- Fig. 3
- the sectional plane III-III in Fig. 1 in supervision.
Die Fig. 1 zeigt in einem Ausschnitt in einer geschnittenen Darstellung den Abschnitt eines erfindungsgemäßen Brennstoffeinspritzventils, der dem hier nicht dargestellten Brennraum einer Brennkraftmaschine zugewandt ist.Fig. 1 shows a section in a cut Representation of the section of an inventive Fuel injector, the not shown here Combustion chamber facing an internal combustion engine.
Ein Ventilkörper 1 ist mit einer Abspritzbohrungsplatte 2,
die Abspritzöffnungen 4 aufweist, über eine Schweißnaht 3
verbunden und bildet zusammen mit diesem einen
Ventilsitzkörper 22. Eine Ventilnadel 5 weist an ihrem dem
nicht dargestellten Brennraum zugewandten Ende einen
Ventilschließkörper 6 auf. Dieser Ventilschließkörper 6 ist
über eine Schweißnaht 7 mit der Ventilnadel 5 verbunden. Der
Ventilschließkörper 6 wirkt mit einer im Ventilkörper 1
vorgesehenen z. B. kegelstumpfförmigen Ventilsitzfläche 8 zu
einem Dichtsitz 9 zusammen. In einer inneren Ausnehmung 10
in der Ventilnadel 5 ist ein Druckelement 11 vorhanden, das
sich über eine Feder 12 gegen die Ventilnadel 5 abstützt.
Das im Ausführungsbeispiel als Stufenzylinder ausgebildete
Druckelement 11 drückt auf ein Federelement, hier eine
Tellerfeder 13, die radial zur Mitte hin mehrere Zungen 14
aufweist. Das Druckelement 11 drückt auf den inneren Rand
dieser Zungen 14. Dadurch wird die Tellerfeder 13 an den
Ventilsitzkörper 22, im Ausführungsbeispiel an die
Abspritzbohrungsplatte 2, gedrückt. A
Fig. 1 zeigt das Brennstoffeinspritzventil in geschlossenem
Zustand. Dabei ist die Tellerfeder 13 durch, das Druckelement
11 gegenüber ihrer Form in unbelastetem Zustand flach
gepresst, und die Zungen 14 überdecken unter den Zungen 14
angeordnete äußere Abspritzöffnungen 15.Fig. 1 shows the fuel injector in the closed
Status. The
Das Druckelement 11 weist einen Bund 16 auf, der als
Anschlag dient. Der mit der Ventilnadel 5 durch die
Schweißnaht 7 verbundene Ventilschließkörper 6 bildet die
als Gegenanschlag dienende Abstufung 17 in der Ausnehmung
10. Nach einem Teilhub h1 der Ventilnadel 5 kommen Bund 16
und Abstufung 17 aneinander zu liegen.The
In Fig. 2 ist dasselbe Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung zeigt denselben Ausschnitt, daher sind gleiche Teile mit denselben Bezugszeichen versehen. Jedoch ist das Brennstoffeinspritzventil in voll geöffnetem Zustand dargestellt.2 is the same embodiment of the invention shown. The drawing shows the same detail, hence the same parts are provided with the same reference numerals. However, the fuel injector is fully open State shown.
In voll geöffnetem Zustand liegt der Bund 16 an der
Abstufung 17 an und das Druckelement 11 wird von der
Ventilnadel 5 mitgenommen. An dem Ventilsitzkörper 22, im
Ausführungsbeispiel an der Abspritzbohrungsplatte 2, liegt
die Tellerfeder 13 an. Das Druckelement 11 ist gegenüber dem
geschlossenen Zustand des Brennstoffeinspritzventils, wie er
in Fig. 1 dargestellt ist, von der Ventilnadel 5 über den
Bund 16 und der an dem Bund 16 anliegenden Abstufung 17 von
der Abspritzbohrungsplatte 2 abgehoben und übt auf die
Zungen 14 der Tellerfeder 13 keine Kraft aus. Die
Tellerfeder 13 nimmt daher die ihrer Vorspannung
entsprechende Form an und gibt die unter den Zungen 14
angeordneten, von den Zungen 14 bisher überdeckten
Abspritzöffnungen 15 frei.In the fully opened state, the
Fig. 3 zeigt die Schnittebene III-III der Fig. 1. In der
Abspritzbohrungsplatte 2 sind die Abspritzöffnungen 4 und
eine zentrale Abspritzöffnung 18 sowie die von den Zungen 14
der Tellerfeder 13 überdeckten Abspritzöffnungen 15
angeordnet, die in der Aufsicht von den Zungen 14 verdeckt
sind und daher gestrichelt angedeutet sind. Diese
überdeckten Abspritzöffnungen 15 sind in einem ersten
äußeren Lochkreis 19 angeordnet, dessen mittlere
Umfangslinie gestrichelt eingezeichnet ist. Die nicht
überdeckten Abspritzöffnungen 4 sind in einem zweiten
inneren Lochkreis 20 angeordnet, dessen mittlere
Umfangslinie ebenfalls gestrichelt eingezeichnet ist. Die
Tellerfeder 13 ist im zusammengedrückten Zustand,
entsprechend einem vollständig geschlossenem
Brennstoffeinspritzventil, dargestellt. Es liegen dann alle
Zungen 14 an der Abspritzbohrungsplatte 2 an.Fig. 3 shows the section plane III-III of Fig. 1. In the
Im geschlossenen Zustand des Brennstoffeinspritzventils sind
alle Abspritzöffnungen 4, 15 durch den Dichtsitz 9
abgedichtet. Wird die Ventilnadel 5 durch einen hier nicht
dargestellten Aktor (elektromagnetisch, piezoelektrisch oder
magnetostriktiv) aus dem Dichtsitz 9 angehoben, so wird der
Brennstoffzulauf zu den Abspritzöffnungen 4 und der
zentralen Abspritzöffnung 18 freigegeben, jedoch sind die
von den Zungen 14 der Tellerfeder 13 überdeckten
Abspritzöffnungen 15 weiterhin verschlossen. Das
Druckelement 11 drückt die Zungen 14 gegen die
Abspritzbohrungsplatte 2 und verschließt die überdeckten
Abspritzöffnungen 15.Are in the closed state of the fuel injector
all
Nach dem Teilhub h1 (Fig. 1) der Ventilnadel 5 schlägt der
Bund 16 des Druckelements 11 gegen die Abstufung 17 in der
Ventilnadel 5. Bei der weiteren Hubbewegung der Ventilnadel
5 wird das Druckelement 11 von der Abspritzbohrungsplatte 2
angehoben. Die Zungen 14 wölben sich aufgrund der
Eigenspannung der Tellerfeder 13 von der
Abspritzbohrungsplatte 2 weg und geben die bisher
überdeckten Abspritzöffnungen 15 frei. Durch die Größe des
weiteren Hubes kann das Maß, wie weit sich die Zungen 14
aufwölben, bestimmt werden. Dadurch wird jedoch auch der
Durchflußquerschnitt zu den überdeckten Abspritzöffnungen 15
festgelegt. Wenn die Ventilnadel 5 nur mit einem Hub kleiner
als h1 angehoben wird, werden nur die nicht überdeckten
Abspritzöffnungen 4 geöffnet, sofern die Federkraft der
Feder 12 größer als die Federkraft der Tellerfeder 13
ausgelegt ist.After the partial stroke h 1 (FIG. 1) of the
Durch unterschiedliche Auslegung der Winkel, unter denen die
überdeckten Abspritzöffnungen 15 und nicht überdeckten
Abspritzöffnungen 4, 18 eingebracht sind, kann der Winkel
eines Brennstoffeinspritzkegels insgesamt,beeinflußt werden.
Vorteilhaft ermöglicht die erfindungsgemäße Ausführung eines
Brennstoffeinspritzventils eine hohe Schaltfrequenz; durch
die geringen bewegten Massen ist ein schnelles Ansprechen
gewährleistet. Die erfindungsgemäße Ausführung ist auch
kostengünstig zu realisieren.By different interpretation of the angles at which the
covered
Bei einem weiteren, nicht in einer Zeichnung dargestellten
günstigen Ausführungsbeispiel ist die Tellerfeder 13 so
geformt, daß sie durch geeignete Flächen nicht nur
Abspritzöffnungen des ersten Lochkreises 19, sondern auch
Abspritzöffnungen des zweiten Lochkreises 20 überdeckt und
bei Entlastung die Abspritzöffnungen 4,15 der
unterschiedlichen Lochkreise 19,20 nacheinander freigibt,
indem sich Teile der Tellerfeder 13 von dem Lochkreis 20
bereits bei geringerer Entlastung hochwölben als von den
Abspritzöffnungen des anderen Lochkreises 19, die von
anderen Teilen der Tellerfeder 13 überdeckt werden.In another, not shown in a drawing
Favorable embodiment is the
Claims (11)
- Fuel injection valve, in particular injection valve for fuel injection systems of internal combustion engines, having a valve needle (5) which has a valve-closing body (6) which interacts with a valve seat surface (8) in a valve seat body (22) to form a sealing seat (9), a plurality of spray-discharge openings (4, 15, 18) being arranged downstream of the sealing seat (9) and being sealed off with respect to a fuel inlet by the sealing seat (9), characterized in that the valve-closing body (6) has, in a recess (10) facing the valve seat body (22), a thrust element (11) which acts under prestress on a spring element (13) in such a manner that at least one of the spray-discharge openings (15) is covered by the spring element (13) and this spring element (13) opens up this spray-discharge opening (15) without the thrust element (11) acting.
- Fuel injection valve according to Claim 1, characterized in that the thrust element (11) has a stop against which a mating stop of the valve-closing body (6) bears after a partial stroke (h1) of the valve-closing body (6) and, when the stroke continues, lifts the thrust element (11) off the valve seat body (22).
- Fuel injection valve according to Claim 2, characterized in that the stop of the thrust element (11) is a protruding collar (16) and the mating stop of the valve-closing body (6) is a step (17) in the recess (10) of the valve-closing body (6).
- Fuel injection valve according to one of Claims 1 to 3, characterized in that the spring element is designed as a disc spring (13) and the disc spring (13) has tongues (14) which are orientated radially inwards, at least one tongue (14) covering a spray-discharge opening (15) when the tongues (14) are pressed at their radially inner end against the valve seat body (22) by the thrust element (11).
- Fuel injection valve according to Claim 4, characterized in that some of the spray-discharge openings (15) are arranged in a first hole circle (19) covered by tongues (14) of the disc spring (13).
- Fuel injection valve according to Claim 5, characterized in that the valve seat body (22) has a second hole circle (20) of spray-discharge openings (4), placed radially inwards with respect to the first hole circle (19), and spray-discharge openings (4) of the second hole circle (20) are also covered by correspondingly shaped sections of the disc spring (13).
- Fuel injection valve according to Claim 6, characterized in that the disc spring (13) is shaped in such a manner that, when relieved of load, it successively opens up the spray-discharge openings (4, 15) of the different hole circles (19, 20).
- Fuel injection valve according to one of the preceding claims, characterized in that the spray-discharge openings (4, 15, 18) have different spray-discharge angles.
- Fuel injection valve according to one of the preceding claims, characterized in that the spray-discharge openings (4, 15, 18) have different opening diameters and/or different axial length.
- Fuel injection valve according to one of the preceding claims, characterized in that the valve needle (5) can be actuated by means of an electromagnetic or piezoelectric actuator.
- Fuel injection valve according to one of the preceding claims, characterized in that the spray-discharge openings (4, 15, 18) are made in a perforated spray-discharge plate (2) which is connected fixedly to a valve body (1) having the valve seat (9).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10034445A DE10034445A1 (en) | 2000-07-15 | 2000-07-15 | Fuel injector |
| DE10034445 | 2000-07-15 | ||
| PCT/DE2001/002541 WO2002006664A1 (en) | 2000-07-15 | 2001-07-13 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1303696A1 EP1303696A1 (en) | 2003-04-23 |
| EP1303696B1 true EP1303696B1 (en) | 2004-05-06 |
Family
ID=7649034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01953881A Expired - Lifetime EP1303696B1 (en) | 2000-07-15 | 2001-07-13 | Fuel injection valve |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6772965B2 (en) |
| EP (1) | EP1303696B1 (en) |
| JP (1) | JP2004504532A (en) |
| KR (1) | KR20020029436A (en) |
| DE (2) | DE10034445A1 (en) |
| WO (1) | WO2002006664A1 (en) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10063259A1 (en) * | 2000-12-19 | 2002-07-11 | Bosch Gmbh Robert | Fuel injector |
| DE10261175A1 (en) * | 2002-12-20 | 2004-07-08 | Daimlerchrysler Ag | spool valve |
| DE10314670A1 (en) * | 2003-04-01 | 2004-10-14 | Robert Bosch Gmbh | Process for manufacturing and fastening a perforated disc |
| JP3891974B2 (en) * | 2003-10-01 | 2007-03-14 | 株式会社日本自動車部品総合研究所 | Fuel injection valve |
| EP1559903B1 (en) * | 2004-01-28 | 2008-12-10 | Continental Automotive Italy S.p.A. | Fuel injector with deformable needle |
| EP1559905A1 (en) * | 2004-01-29 | 2005-08-03 | Siemens VDO Automotive S.p.A. | Fluid injector with a deformable valve needle |
| JP4289458B2 (en) * | 2004-09-07 | 2009-07-01 | 三菱電機株式会社 | Electric power steering control device |
| JP2006152812A (en) * | 2004-11-25 | 2006-06-15 | Denso Corp | Fuel injection valve and method of manufacturing the same |
| US7762478B1 (en) * | 2006-01-13 | 2010-07-27 | Continental Automotive Systems Us, Inc. | High speed gasoline unit fuel injector |
| DE102006031567A1 (en) * | 2006-07-07 | 2008-01-10 | Siemens Ag | Injection system and method for manufacturing an injection system |
| US7669789B2 (en) * | 2007-08-29 | 2010-03-02 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
| JP4420102B2 (en) * | 2007-10-30 | 2010-02-24 | 株式会社デンソー | Injector |
| US7628137B1 (en) * | 2008-01-07 | 2009-12-08 | Mcalister Roy E | Multifuel storage, metering and ignition system |
| US8387599B2 (en) | 2008-01-07 | 2013-03-05 | Mcalister Technologies, Llc | Methods and systems for reducing the formation of oxides of nitrogen during combustion in engines |
| US8635985B2 (en) | 2008-01-07 | 2014-01-28 | Mcalister Technologies, Llc | Integrated fuel injectors and igniters and associated methods of use and manufacture |
| US7946276B2 (en) * | 2008-03-31 | 2011-05-24 | Caterpillar Inc. | Protection device for a solenoid operated valve assembly |
| EP2226492A1 (en) * | 2009-03-04 | 2010-09-08 | Continental Automotive GmbH | Injection valve having kinetic energy absorbing valve needle |
| KR101364416B1 (en) | 2009-12-07 | 2014-02-17 | 맥알리스터 테크놀로지즈 엘엘씨 | Integrated fuel injector igniters suitable for large engine applications and associated methods of use and manufacture |
| WO2011100701A2 (en) | 2010-02-13 | 2011-08-18 | Mcalister Roy E | Fuel injector assemblies having acoustical force modifiers and associated methods of use and manufacture |
| US20120103308A1 (en) * | 2010-10-28 | 2012-05-03 | Caterpillar, Inc. | Two-Way Valve Orifice Plate for a Fuel Injector |
| WO2013025626A1 (en) | 2011-08-12 | 2013-02-21 | Mcalister Technologies, Llc | Acoustically actuated flow valve assembly including a plurality of reed valves |
| US20150211461A1 (en) * | 2012-08-01 | 2015-07-30 | 3M Innovative Properties Company | Fuel injectors with non-coined three-dimensional nozzle inlet face |
| WO2014022631A1 (en) | 2012-08-01 | 2014-02-06 | 3M Innovative Properties Company | Fuel injectors with improved coefficient of fuel discharge |
| US9169821B2 (en) | 2012-11-02 | 2015-10-27 | Mcalister Technologies, Llc | Fuel injection systems with enhanced corona burst |
| US8746197B2 (en) | 2012-11-02 | 2014-06-10 | Mcalister Technologies, Llc | Fuel injection systems with enhanced corona burst |
| US9169814B2 (en) | 2012-11-02 | 2015-10-27 | Mcalister Technologies, Llc | Systems, methods, and devices with enhanced lorentz thrust |
| US9200561B2 (en) | 2012-11-12 | 2015-12-01 | Mcalister Technologies, Llc | Chemical fuel conditioning and activation |
| US9194337B2 (en) | 2013-03-14 | 2015-11-24 | Advanced Green Innovations, LLC | High pressure direct injected gaseous fuel system and retrofit kit incorporating the same |
| DE102013212191A1 (en) * | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | Method and device for injecting a gaseous medium |
| EP2857671A1 (en) * | 2013-10-04 | 2015-04-08 | Continental Automotive GmbH | Fluid injector |
| US10370177B2 (en) * | 2016-11-22 | 2019-08-06 | Summit Packaging Systems, Inc. | Dual component insert with uniform discharge orifice for fine mist spray |
| DE102017220911A1 (en) * | 2017-11-23 | 2019-05-23 | Robert Bosch Gmbh | Gas injector with improved injection properties |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE926643C (en) | 1952-05-21 | 1955-04-21 | Friedrich Wilhelm Deckel Dipl | Injection nozzle |
| DE3048304A1 (en) | 1980-12-20 | 1982-07-29 | Robert Bosch Gmbh, 7000 Stuttgart | "FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES" |
| DE3120044A1 (en) | 1981-05-20 | 1982-12-09 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection nozzle for internal combustion engines |
| DE3228079A1 (en) | 1982-07-28 | 1984-02-02 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
| US5692723A (en) * | 1995-06-06 | 1997-12-02 | Sagem-Lucas, Inc. | Electromagnetically actuated disc-type valve |
| US5642862A (en) * | 1995-07-28 | 1997-07-01 | Siemens Automotive Corporation | Fuel injection valve having a guide diaphragm and method for assembling |
| US5758865A (en) * | 1996-08-21 | 1998-06-02 | Kavlico Corporation | Fuel injection valve and engine including the same |
-
2000
- 2000-07-15 DE DE10034445A patent/DE10034445A1/en not_active Withdrawn
-
2001
- 2001-07-13 EP EP01953881A patent/EP1303696B1/en not_active Expired - Lifetime
- 2001-07-13 JP JP2002512536A patent/JP2004504532A/en active Pending
- 2001-07-13 WO PCT/DE2001/002541 patent/WO2002006664A1/en not_active Application Discontinuation
- 2001-07-13 DE DE50102215T patent/DE50102215D1/en not_active Expired - Lifetime
- 2001-07-13 US US10/070,967 patent/US6772965B2/en not_active Expired - Fee Related
- 2001-07-13 KR KR1020027003385A patent/KR20020029436A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004504532A (en) | 2004-02-12 |
| US6772965B2 (en) | 2004-08-10 |
| KR20020029436A (en) | 2002-04-18 |
| WO2002006664A1 (en) | 2002-01-24 |
| DE10034445A1 (en) | 2002-01-24 |
| DE50102215D1 (en) | 2004-06-09 |
| EP1303696A1 (en) | 2003-04-23 |
| US20020179742A1 (en) | 2002-12-05 |
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