EP2627891B1 - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
EP2627891B1
EP2627891B1 EP11758220.5A EP11758220A EP2627891B1 EP 2627891 B1 EP2627891 B1 EP 2627891B1 EP 11758220 A EP11758220 A EP 11758220A EP 2627891 B1 EP2627891 B1 EP 2627891B1
Authority
EP
European Patent Office
Prior art keywords
valve
holding body
valve needle
valve body
region
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.)
Not-in-force
Application number
EP11758220.5A
Other languages
German (de)
French (fr)
Other versions
EP2627891A2 (en
Inventor
Martin Mueller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2627891A2 publication Critical patent/EP2627891A2/en
Application granted granted Critical
Publication of EP2627891B1 publication Critical patent/EP2627891B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • 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
    • F02M61/08—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 opening in direction of fuel flow
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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

Definitions

  • the present invention relates to an apparatus for injecting fuel having an improved and less expensive construction.
  • EP1731754A discloses such an injector.
  • the fuel injection device according to the invention with the features of claim 1 has the advantage that it has a much simpler and cheaper construction. This results in very large potential savings in mass production. Furthermore, a simpler installation is possible.
  • the device has an outwardly opening valve needle, which is actuated by a piezoelectric actuator having.
  • a valve body having a first passage opening and a holding body connected to the valve body are provided with a second passage opening.
  • the valve needle is arranged in both passage openings.
  • the valve body also has a first guide region for guiding the valve needle.
  • the first passage opening in the valve body is provided such that the passage opening has no undercut.
  • the elongated through hole is formed such that no groove-shaped recesses or the like are provided in the through hole.
  • the passage opening can be made from one side, for example by means of a multi-stage drilling process, quickly and inexpensively.
  • a valve seat and the guide region of the valve needle can be ground in one clamping from one side of the passage opening. In this case, in particular a complex, two-sided grinding process can be avoided.
  • the device comprises a sleeve arranged in the holding body with a second guide region on which the valve needle is guided.
  • the second guide region is preferably arranged in the dry region of the device, so that no corrosion-resistant material has to be used for this purpose.
  • the apparatus includes a bellows for sealing a fuel-filled area of a dry, fuel-free area of the apparatus.
  • a first end of the bellows is arranged directly on the valve needle.
  • the bellows is more preferably made of a single-layer metal material, so that it is particularly inexpensive.
  • a second end of the bellows is attached to the socket arranged on the holding body.
  • the device comprises a return element, which is supported on the holding body.
  • the return element is preferably a cylindrical spring.
  • the restoring element is further preferably arranged in the dry region of the device. More preferably, the restoring element is supported on a plate element, which is fastened to the valve needle.
  • the plate element is preferably arranged at the opposite end of the injection side of the valve needle.
  • the holding body according to the invention has a first contact surface and the valve body has a second contact surface.
  • the two contact surfaces touch each other and are arranged perpendicular to a central axis of the device.
  • a flat contact between the valve body and the holding body is achieved, whereby a simple and secure connection of the two components is possible.
  • the holding body and / or the valve body has a centering collar in order to simplify the assembly even further.
  • the valve body in the axial direction of the device has a length which is smaller than a length of the holding body.
  • the length of the valve body is smaller than that of the holding body by more than half.
  • the valve needle comprises a third guide section, which are guided on a common guide area with the first guide section in the valve body.
  • the guide region in the valve body is formed over a certain axial length, so that the two guide sections are guided on the valve needle on the guide area.
  • the device comprises a cylindrical annular flow region, which is arranged between the first guide region on the valve body and a fuel outlet.
  • a cross-sectional area of the annular flow area is approximately twice as large, preferably exactly twice as large as a cylindrical annular exit area at the fuel outlet.
  • the cylinder-shaped flow region according to the invention makes it possible to stabilize the fuel flow when the valve is open, since due to the provision of the first guide regions, a slight turbulence of the fuel flow can occur. This can be throttled in the cylindrical flow area. Since the exit area at the fuel outlet is approximately half the size of the cross-sectional area of the cylindrical annular flow area, further throttling takes place at the outlet, whereby a precisely defined shape of the spray is obtained.
  • a length of the cylindrical annular flow region is selected such that the length is approximately two to five times, preferably four times as long as a width of the cylindrical annular flow region, the width being defined as the radial distance between the needle and the passage opening of the valve body at the flow region. In this way it can be ensured that the cylindrical annular flow region is long enough to obtain the desired stabilization of the fuel flow when the valve is open.
  • FIGS. 1 and 2 a device 1 for injecting fuel according to a first embodiment of the invention described in detail.
  • the device 1 for injecting fuel comprises a piezoelectric actuator 2, which is connected to an outwardly opening valve needle 3.
  • the valve needle 3 is a one-piece component, which is arranged in a valve body 4 and a holding body 5.
  • the valve body 4 has a first passage opening 40 and the holding body 5 has a second passage opening 50.
  • a valve seat 13 is arranged, on which the valve needle 3 rests in the closed state.
  • a first guide region 11 for guiding the valve needle 3 is arranged adjacent to the valve seat 13 in the passage opening 40.
  • the valve needle 3 is further guided on a second guide portion 12, which is provided on an inner periphery of a bush 6.
  • valve needle 3 has a second guide section 32. It should be noted that the guide portions 31, 32 and the guide portions 11 and 12 have been machined by a finishing method to have an excellent slidability.
  • the bush 6 is connected to the holding body 5 by means of a welded connection 16 and is partially inserted into the holding body 5.
  • the device 1 further comprises a corrugated bellows 9, which is made of a single-layered metal material. How out FIG. 1 can be seen, the corrugated bellows 9 is welded to a first end 9a by means of a welded joint 14 directly to the valve needle 3. A second, opposite end 9b of the corrugated bellows 9 is welded to the bushing 6 by means of a welded joint 15. In this case, the socket 6 has a small shoulder to safely receive the second end 9a.
  • the corrugated bellows 9 divides the injector into a wet region 20, on which fuel is present, and a dry region 21, which is fuel-free.
  • the device 1 further comprises a return spring 7, which is supported with one end on the holding body 5 and supported at its other end to a spring plate 8.
  • the spring plate 8 is fastened by means of a welded connection 17 directly to the valve needle 3.
  • the reference numeral 10 denotes a filter through which the fuel, as indicated by the arrow A, is supplied.
  • the fuel is then guided along the bellows 9 and the front portion of the valve needle 3 to the valve seat 13.
  • the valve needle in Region of the first guide portion 31 recesses 33 provided so that the fuel is applied directly to the valve seat 13.
  • a centering collar 42 is further formed on the valve body 4. How out FIG. 1 it can be seen, the centering collar 42 is inserted into the second through hole 50 of the holding body 5.
  • a first contact surface 41 and on the holding body 5 a second contact surface 51 is further formed on the valve body 4, which are each aligned perpendicular to the axial direction XX. This results in a planar contact surface between the valve body 4 and the holding body 5, so that a connection between the valve body 4 and holding body 5 can be made by means of a welded joint 18.
  • a cylindrical annular flow region 62 is arranged on the valve body 4 between the first guide region 11 and a fuel outlet 61.
  • the cylindrical annular flow region 62 is formed between the needle 3 and the passage opening 40 of the valve body 4.
  • the cylindrical annular flow region 62 in this case has an annular surface C.
  • an annular surface D is perpendicular to the flow direction with the valve fully open between the valve needle 3 and the valve seat 13, wherein the annular surface D is about half as large as the annular surface C.
  • a length L of the cylindrical annular flow region 62 is about four times The width is the radial distance between the needle and the wall surface of the passage opening 40 at the flow area 62.
  • the function of the injector according to the invention is as follows. If an injection takes place, the piezoelectric actuator 2 is activated, whereby the valve needle 3 is moved in the direction of the arrow B and lifts off from the valve seat 13. Fuel can thereby be injected through the opened injector. The movement The valve needle 3 takes place counter to the spring force of the return spring 7, which is biased by the stroke of the valve needle 3. If the injection is terminated again, the piezoelectric actuator is deactivated again and the injector is automatically returned to the in. By the biased return spring 7 FIG. 1 shown reset initial position and the valve needle 3 is located on the valve seat 13 firmly and seals there in a known manner.
  • an outwardly opening injector can be provided, which in particular has a simplified and less expensive construction than in the prior art.
  • a length L1 of the valve body 4 in the axial direction XX is smaller than a length L2 of the holding body 5 in the axial direction XX.
  • a short and simply shaped valve body 4 can be provided, wherein the through-hole 40 is formed in the valve body 4 without an undercut.
  • the through hole can be made very easily.
  • the sealing seat 13 and the first guide portion 11 on the valve body 4 are immediately adjacent to each other, a production of these surfaces can be carried out in a clamping from the same side.
  • valve body 4 As in the prior art, two separate guide surfaces need not be machined on the valve body 4, which significantly increases the cost of manufacturing the valve body 4.
  • the side directed towards the holding body 5 of the valve body 4 can be produced inexpensively by means of a turning operation.
  • the closing force of the return spring 7 can be adjusted in a simple manner by fixing the spring plate 8 at a corresponding position on the valve needle 3.
  • the corrugated bellows 9 is arranged completely in the holding body 5.
  • the corrugated bellows 9 can be inexpensively provided as a single-layer metal element, since in the holding body 5 sufficient space for the arrangement of the corrugated bellows 9 is present.
  • a bellows 9 can thereby be used, which is relatively long in the axial direction XX. In this way, the corrugated bellows 9 can have a multiplicity of waves in order to absorb the bending loads acting on it sufficiently.
  • the bushing 6 can be used, which also has an enlarged length in the axial direction XX. This allows a distance between the welded joint 16 to the holding body 5 and the second guide portion 32 are designed to be larger. This makes it possible that the bushing 6 can be tempered, because there is no hardness drop at the guide area by the welding process. The tempered bushing has less wear, especially when lateral forces act on the valve needle 3.
  • the spring plate 8 is very inexpensive to produce as a simple deep-drawn part. In this case, in particular, a spring centering collar on the spring plate can be dispensed with.
  • the injector according to the invention thus has a number of improvements, which overall allow a significant cost savings in the manufacture of the injector.
  • the provision of the undercut-free valve body 4 reduces the manufacturing costs significantly.
  • FIG. 3 a device 1 for injecting fuel according to a second embodiment of the invention described in detail. Identical or functionally identical parts are denoted by the same reference numerals as in the first embodiment.
  • the device of the second exemplary embodiment has a third guide section 34 on the valve needle 3. How out FIG. 3 is apparent, the third guide portion 34 adjacent to the first guide portion 31 is arranged. At the third guide section 34, the valve needle 3 is guided on the valve body 4 as in the first guide section 31. For this purpose, the first guide portion 11 is extended in the passage opening 40 of the valve body in the axial direction XX. In this way, although an extended first guide portion 11 must be provided in the through hole 40, but the valve needle 3 is aligned better in particular near the valve seat 13 to the central axis.
  • a seat gap between the valve needle 3 and the valve seat 13 may be more uniform circumferentially, whereby the ejected fuel spray is more uniform over the circumference.
  • the guide regions Due to the small distance between the first and third guide region 31, 33 in the valve body 4, however, the guide regions can be ground inexpensively, as in the first exemplary embodiment, in a clamping from the seat side.
  • One Another difference from the first embodiment lies in the connection between the valve body 4 and the holding body 5.
  • a centering collar 52 is provided both on the valve body 4 and a centering collar 52 on the holding body 5.
  • a clearance fit or a press fit may be provided between the centering collar 42 and the centering collar 52.
  • the centering collar 52 of the holding body 5 heats up more than the radially inner centering collar 42 of the valve body 4, because the centering collar 52 is thin-walled compared to the centering collar 42. As the components cool, therefore, the centering collar 52 of the holding body 5 shrinks more than the valve body 4. As a result, the valve body 4 is pulled onto the axial contact surface 51 on the holding body 5 and therefore aligns very accurately. Since the welding operation is relatively far away from the contact surfaces 41, 51 in the axial direction XX, different welding distortions along the circumference, if at all, have a very slight effect on a non-axial alignment of the valve body 4 with the holding body 5.

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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

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Vorrichtung zum Einspritzen von Kraftstoff mit einem verbesserten und kostengünstigeren Aufbau.The present invention relates to an apparatus for injecting fuel having an improved and less expensive construction.

Im Bereich der Kraftstoff-Direkteinspritzung werden zunehmend auch Piezo-Injektoren mit nach außen öffnender Ventilnadel verwendet. Hierbei hat sich herausgestellt, dass einerseits die exakte Führung der Ventilnadel sichergestellt werden muss und andererseits eine sichere und langlebige Abdichtung zwischen einem mit Kraftstoff gefüllten Bereich und einem trockenen (kraftstofffreien) Bereich des Injektors sichergestellt werden muss.In the field of direct fuel injection, piezo injectors with outwardly opening valve needle are increasingly being used. It has been found that on the one hand the exact guidance of the valve needle must be ensured and on the other hand a secure and durable seal between a fuel-filled area and a dry (fuel-free) area of the injector must be ensured.

EP1731754A offenbart einen solchen Injektor. EP1731754A discloses such an injector.

Offenbarung der ErfindungDisclosure of the invention

Die erfindungsgemäße Vorrichtung zur Einspritzung von Kraftstoff mit den Merkmalen des Anspruchs 1 weist demgegenüber den Vorteil auf, dass sie einen deutlich einfacheren und kostengünstigeren Aufbau aufweist. Hierdurch ergeben sich sehr große Einsparpotentiale bei der Serienfertigung. Ferner wird auch eine einfachere Montage möglich. Dies wird erfindungsgemäß dadurch erreicht, dass die Vorrichtung eine nach außen öffnende Ventilnadel, welche von einem Piezoaktor betätigt wird, aufweist. Ferner sind ein Ventilkörper mit einer ersten Durchgangsöffnung und ein mit dem Ventilkörper verbundener Haltekörper mit einer zweiten Durchgangsöffnung vorgesehen. Die Ventilnadel ist dabei in beiden Durchgangsöffnungen angeordnet. Der Ventilkörper umfasst neben einem Ventilsitz auch einen ersten Führungsbereich zum Führen der Ventilnadel. Hierbei ist die erste Durchgangsöffnung im Ventilkörper derart vorgesehen, dass die Durchgangsöffnung keine Hinterschneidung aufweist. Mit anderen Worten, ist die längliche Durchgangsöffnung derart gebildet, dass keine nutförmigen Ausnehmungen oder Ähnliches in der Durchgangsöffnung vorhanden sind. Hierdurch kann die Durchgangsöffnung von einer Seite z.B. mittels eines mehrstufigen Bohrverfahrens, schnell und kostengünstig hergestellt werden. Ferner kann bevorzugt auch ein Ventilsitz und der Führungsbereich der Ventilnadel in einer Aufspannung von einer Seite der Durchgangsöffnung geschliffen werden. Hierbei kann insbesondere ein aufwendiger, zweiseitiger Schleifprozess vermieden werden.The fuel injection device according to the invention with the features of claim 1 has the advantage that it has a much simpler and cheaper construction. This results in very large potential savings in mass production. Furthermore, a simpler installation is possible. This is inventively achieved in that the device has an outwardly opening valve needle, which is actuated by a piezoelectric actuator having. Furthermore, a valve body having a first passage opening and a holding body connected to the valve body are provided with a second passage opening. The valve needle is arranged in both passage openings. In addition to a valve seat, the valve body also has a first guide region for guiding the valve needle. Here, the first passage opening in the valve body is provided such that the passage opening has no undercut. In other words, is the elongated through hole is formed such that no groove-shaped recesses or the like are provided in the through hole. As a result, the passage opening can be made from one side, for example by means of a multi-stage drilling process, quickly and inexpensively. Furthermore, preferably also a valve seat and the guide region of the valve needle can be ground in one clamping from one side of the passage opening. In this case, in particular a complex, two-sided grinding process can be avoided.

Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung.The dependent claims show preferred developments of the invention.

Weiter bevorzugt umfasst die Vorrichtung eine im Haltekörper angeordnete Buchse mit einem zweiten Führungsbereich, an welchem die Ventilnadel geführt ist. Der zweite Führungsbereich ist hierbei vorzugsweise im trockenen Bereich der Vorrichtung angeordnet, so dass kein korrosionsbeständiges Material hierfür verwendet werden muss.More preferably, the device comprises a sleeve arranged in the holding body with a second guide region on which the valve needle is guided. In this case, the second guide region is preferably arranged in the dry region of the device, so that no corrosion-resistant material has to be used for this purpose.

Weiter bevorzugt umfasst die Vorrichtung einen Balg zur Abdichtung eines mit Kraftstoff gefüllten Bereichs von einem trockenen, kraftstofffreien Bereich der Vorrichtung. Hierbei ist ein erstes Ende des Balgs direkt an der Ventilnadel angeordnet. Hierdurch kann die Teilezahl reduziert werden, da an der Ventilnadel kein zusätzlicher Ring o.ä. zur Befestigung des Balgs vorgesehen werden muss. Der Balg ist weiter bevorzugt aus einem einlagigen Metallmaterial hergestellt, so dass er besonders kostengünstig ist. Weiter bevorzugt ist ein zweites Ende des Balgs an der am Haltekörper angeordneten Buchse befestigt. Somit ist es möglich, dass schon eine Vormontage der Bauteile Ventilnadel, Balg und Buchse vorgesehen werden kann, welche dann als Baugruppe in die Vorrichtung montiert werden kann.More preferably, the apparatus includes a bellows for sealing a fuel-filled area of a dry, fuel-free area of the apparatus. Here, a first end of the bellows is arranged directly on the valve needle. As a result, the number of parts can be reduced because no additional ring or similar on the valve needle. must be provided for attachment of the bellows. The bellows is more preferably made of a single-layer metal material, so that it is particularly inexpensive. More preferably, a second end of the bellows is attached to the socket arranged on the holding body. Thus, it is possible that a pre-assembly of the components valve needle, bellows and socket can be provided, which can then be mounted as an assembly in the device.

Weiter bevorzugt umfasst die Vorrichtung ein Rückstellelement, welches sich am Haltekörper abstützt. Das Rückstellelement ist vorzugsweise eine Zylinderfeder. Das Rückstellelement ist dabei weiter bevorzugt im trockenen Bereich der Vorrichtung angeordnet. Weiter bevorzugt stützt sich das Rückstellelement an einem Tellerelement ab, welches an der Ventilnadel befestigt ist. Das Tellerelement ist vorzugsweise am entgegengesetzten Ende der Einspritzseite der Ventilnadel angeordnet.More preferably, the device comprises a return element, which is supported on the holding body. The return element is preferably a cylindrical spring. The restoring element is further preferably arranged in the dry region of the device. More preferably, the restoring element is supported on a plate element, which is fastened to the valve needle. The plate element is preferably arranged at the opposite end of the injection side of the valve needle.

Für eine besonders einfache und schnelle Montage weist der Haltekörper erfindungsgemäß eine erste Kontaktfläche und der Ventilkörper eine zweite Kontaktfläche auf. Die beiden Kontaktflächen berühren einander und sind senkrecht zu einer Mittelachse der Vorrichtung angeordnet. Hierdurch wird eine flächige Anlage zwischen dem Ventilkörper und dem Haltekörper erreicht, wodurch eine einfache und sichere Verbindung der beiden Bauteile möglich ist. Dabei weist der Haltekörper und/oder der Ventilkörper einen Zentrierbund auf, um die Montage noch weiter zu vereinfachen.For a particularly simple and quick mounting, the holding body according to the invention has a first contact surface and the valve body has a second contact surface. The two contact surfaces touch each other and are arranged perpendicular to a central axis of the device. As a result, a flat contact between the valve body and the holding body is achieved, whereby a simple and secure connection of the two components is possible. In this case, the holding body and / or the valve body has a centering collar in order to simplify the assembly even further.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung weist der Ventilkörper in Axialrichtung der Vorrichtung eine Länge auf, welche kleiner ist als eine Länge des Haltekörpers. Vorzugsweise ist die Länge des Ventilkörpers dabei um mehr als die Hälfte kleiner als die des Haltekörpers.According to a further preferred embodiment of the invention, the valve body in the axial direction of the device has a length which is smaller than a length of the holding body. Preferably, the length of the valve body is smaller than that of the holding body by more than half.

Weiter bevorzugt umfasst die Ventilnadel einen dritten Führungsabschnitt, welcher auf einem gemeinsamen Führungsbereich mit dem ersten Führungsabschnitt im Ventilkörper geführt werden. Der Führungsbereich im Ventilkörper ist dabei über eine gewisse axiale Länge ausgebildet, so dass die beiden Führungsabschnitte an der Ventilnadel auf dem Führungsbereich geführt werden.More preferably, the valve needle comprises a third guide section, which are guided on a common guide area with the first guide section in the valve body. The guide region in the valve body is formed over a certain axial length, so that the two guide sections are guided on the valve needle on the guide area.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung umfasst die Vorrichtung einen zylinderringförmigen Strömungsbereich, welcher zwischen dem ersten Führungsbereich am Ventilkörper und einem Kraftstoffaustritt angeordnet ist. Hierbei ist eine Querschnittsfläche des ringförmigen Strömungsbereichs ungefähr doppelt so groß, vorzugsweise genau doppelt so groß, wie eine zylinderringförmige Austrittsfläche am Kraftstoffaustritt. Der erfindungsgemäße zylinderringförmige Strömungsbereich ermöglicht dabei eine Verstetigung der Kraftstoffströmung bei geöffnetem Ventil, da aufgrund des Vorsehens der ersten Führungsbereiche eine leichte Verwirbelung des Kraftstoffstroms auftreten kann. Diese kann im zylinderringförmigen Strömungsbereich gedrosselt werden. Da die Austrittsfläche am Kraftstoffaustritt ungefähr halb so groß ist wie die Querschnittsfläche des zylinderringförmigen Strömungsbereichs, erfolgt eine weitere Drosselung am Austritt, wodurch eine exakt definierte Form des Sprays erhalten wird.According to a further preferred embodiment of the invention, the device comprises a cylindrical annular flow region, which is arranged between the first guide region on the valve body and a fuel outlet. Here, a cross-sectional area of the annular flow area is approximately twice as large, preferably exactly twice as large as a cylindrical annular exit area at the fuel outlet. The cylinder-shaped flow region according to the invention makes it possible to stabilize the fuel flow when the valve is open, since due to the provision of the first guide regions, a slight turbulence of the fuel flow can occur. This can be throttled in the cylindrical flow area. Since the exit area at the fuel outlet is approximately half the size of the cross-sectional area of the cylindrical annular flow area, further throttling takes place at the outlet, whereby a precisely defined shape of the spray is obtained.

Weiter bevorzugt ist eine Länge des zylinderringförmigen Strömungsbereichs derart gewählt, dass die Länge ungefähr zwei bis fünf Mal, vorzugsweise vier Mal so lang ist wie eine Breite des zylinderringförmigen Strömungsbereichs, wobei die Breite definiert ist als radialer Abstand der Nadel zur Durchgangsöffnung des Ventilkörpers am Strömungsbereich. Hierdurch kann sichergestellt werden, dass der zylinderringförmige Strömungsbereich lang genug ist, um die gewünschte Verstetigung des Kraftstoffstroms bei geöffnetem Ventil zu erhalten.More preferably, a length of the cylindrical annular flow region is selected such that the length is approximately two to five times, preferably four times as long as a width of the cylindrical annular flow region, the width being defined as the radial distance between the needle and the passage opening of the valve body at the flow region. In this way it can be ensured that the cylindrical annular flow region is long enough to obtain the desired stabilization of the fuel flow when the valve is open.

Kurze Beschreibung der ZeichnungShort description of the drawing

Nachfolgend werden Ausführungsbeispiele der Erfindung unter Bezugnahme auf die begleitende Zeichnung im Detail beschrieben. In der Zeichnung ist:

Figur 1
eine schematische Schnittansicht einer erfindungsgemäßen Vorrichtung zum Einspritzen von Kraftstoff gemäß einem ersten Ausführungsbeispiel der Erfindung,
Figur 2
eine schematische, vergrößerte Schnittansicht der Vorrichtung während eines Einspritzvorgangs, und
Figur 3
eine schematische Schnittansicht einer erfindungsgemäßen Vorrichtung zum Einspritzen von Kraftstoff gemäß einem zweiten Ausführungsbeispiel der Erfindung.
Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. In the drawing is:
FIG. 1
a schematic sectional view of a device according to the invention for injecting fuel according to a first embodiment of the invention,
FIG. 2
a schematic, enlarged sectional view of the device during an injection process, and
FIG. 3
a schematic sectional view of an inventive device for injecting fuel according to a second embodiment of the invention.

Ausführungsformen der ErfindungEmbodiments of the invention

Nachfolgend wird unter Bezugnahme auf die Figuren 1 und 2 eine Vorrichtung 1 zum Einspritzen von Kraftstoff gemäß einem ersten Ausführungsbeispiel der Erfindung im Detail beschrieben.The following is with reference to the FIGS. 1 and 2 a device 1 for injecting fuel according to a first embodiment of the invention described in detail.

Wie aus Figur 1 ersichtlich ist, umfasst die Vorrichtung 1 zum Einspritzen von Kraftstoff einen Piezoaktor 2, der mit einer nach außen öffnenden Ventilnadel 3 verbunden ist. Die Ventilnadel 3 ist ein einstückiges Bauteil, welches in einem Ventilkörper 4 und einem Haltekörper 5 angeordnet ist. Hierbei weist der Ventilkörper 4 eine erste Durchgangsöffnung 40 auf und der Haltekörper 5 weist eine zweite Durchgangsöffnung 50 auf. Am Ventilkörper 4 ist ein Ventilsitz 13 angeordnet, an welchem die Ventilnadel 3 im geschlossenen Zustand anliegt. Hierbei ist benachbart zum Ventilsitz 13 in der Durchgangsöffnung 40 ein erster Führungsbereich 11 zur Führung der Ventilnadel 3 angeordnet. Die Ventilnadel 3 ist weiterhin an einem zweiten Führungsbereich 12 geführt, welcher an einem inneren Umfang einer Buchse 6 vorgesehen ist. In diesem Bereich weist die Ventilnadel 3 einen zweiten Führungsabschnitt 32 auf. Es sei angemerkt, dass die Führungsabschnitte 31, 32 sowie die Führungsbereiche 11 und 12 mittels eines Feinbearbeitungsverfahrens bearbeitet wurden, um eine exzellente Gleitfähigkeit aufzuweisen. Die Buchse 6 ist mittels einer Schweißverbindung 16 mit dem Haltekörper 5 verbunden und ist teilweise in den Haltekörper 5 eingeführt.How out FIG. 1 it can be seen, the device 1 for injecting fuel comprises a piezoelectric actuator 2, which is connected to an outwardly opening valve needle 3. The valve needle 3 is a one-piece component, which is arranged in a valve body 4 and a holding body 5. Here, the valve body 4 has a first passage opening 40 and the holding body 5 has a second passage opening 50. On the valve body 4, a valve seat 13 is arranged, on which the valve needle 3 rests in the closed state. In this case, a first guide region 11 for guiding the valve needle 3 is arranged adjacent to the valve seat 13 in the passage opening 40. The valve needle 3 is further guided on a second guide portion 12, which is provided on an inner periphery of a bush 6. In this area, the valve needle 3 has a second guide section 32. It should be noted that the guide portions 31, 32 and the guide portions 11 and 12 have been machined by a finishing method to have an excellent slidability. The bush 6 is connected to the holding body 5 by means of a welded connection 16 and is partially inserted into the holding body 5.

Die Vorrichtung 1 umfasst ferner einen Wellbalg 9, welcher aus einem einlagigen Metallmaterial hergestellt ist. Wie aus Figur 1 ersichtlich ist, ist der Wellbalg 9 mit einem ersten Ende 9a mittels einer Schweißverbindung 14 direkt auf die Ventilnadel 3 geschweißt. Ein zweites, gegenüberliegendes Ende 9b des Wellbalgs 9 ist mittels einer Schweißverbindung 15 an die Buchse 6 geschweißt. Hierbei weist die Buchse 6 einen kleinen Absatz auf, um das zweite Ende 9a sicher aufzunehmen. Der Wellbalg 9 unterteilt dabei den Injektor in einen nassen Bereich 20, an welchem Kraftstoff vorhanden ist, und einen trockenen Bereich 21, welcher kraftstofffrei ist.The device 1 further comprises a corrugated bellows 9, which is made of a single-layered metal material. How out FIG. 1 can be seen, the corrugated bellows 9 is welded to a first end 9a by means of a welded joint 14 directly to the valve needle 3. A second, opposite end 9b of the corrugated bellows 9 is welded to the bushing 6 by means of a welded joint 15. In this case, the socket 6 has a small shoulder to safely receive the second end 9a. The corrugated bellows 9 divides the injector into a wet region 20, on which fuel is present, and a dry region 21, which is fuel-free.

Die Vorrichtung 1 umfasst ferner eine Rückstellfeder 7, welche sich mit einem Ende am Haltekörper 5 abstützt und mit ihrem anderen Ende an einem Federteller 8 abstützt. Der Federteller 8 ist mittels einer Schweißverbindung 17 direkt an der Ventilnadel 3 befestigt. Dadurch sind an der Ventilnadel, ausgehend von der Einspritzseite am Ventilsitz 13, zuerst ein erster Führungsabschnitt 31, dann ein durch den Wellbalg 9 bereitgestellter Abdichtbereich und anschließend ein zweiter Führungsabschnitt 32 ausgebildet. Die Rückstellfeder 7 greift dann im Anschluss an den zweiten Führungsabschnitt 32 an der Ventilnadel 3 an.The device 1 further comprises a return spring 7, which is supported with one end on the holding body 5 and supported at its other end to a spring plate 8. The spring plate 8 is fastened by means of a welded connection 17 directly to the valve needle 3. As a result, first a first guide section 31, then a sealing area provided by the bellows 9 and subsequently a second guide section 32 are formed on the valve needle, starting from the injection side on the valve seat 13. The return spring 7 then acts on the valve needle 3 following the second guide section 32.

Wie weiter aus Figur 1 ersichtlich ist, bezeichnet das Bezugszeichen 10 einen Filter, durch welchen der Kraftstoff, wie durch den Pfeil A angedeutet, zugeführt wird. Der Kraftstoff wird dann entlang des Wellbalgs 9 und des vorderen Bereichs der Ventilnadel 3 zum Ventilsitz 13 geführt. Hierbei sind an der Ventilnadel im Bereich des ersten Führungsabschnitts 31 Ausnehmungen 33 vorgesehen, damit der Kraftstoff unmittelbar am Ventilsitz 13 anliegt.How farther FIG. 1 can be seen, the reference numeral 10 denotes a filter through which the fuel, as indicated by the arrow A, is supplied. The fuel is then guided along the bellows 9 and the front portion of the valve needle 3 to the valve seat 13. Here are the valve needle in Region of the first guide portion 31 recesses 33 provided so that the fuel is applied directly to the valve seat 13.

Für eine schnelle Montage ist am Ventilkörper 4 ferner ein Zentrierbund 42 ausgebildet. Wie aus Figur 1 ersichtlich ist, ist der Zentrierbund 42 in die zweite Durchgangsöffnung 50 des Haltekörpers 5 eingeführt. Dabei ist weiterhin am Ventilkörper 4 eine erste Kontaktfläche 41 und am Haltekörper 5 eine zweite Kontaktfläche 51 ausgebildet, welche jeweils senkrecht zur Axialrichtung X-X ausgerichtet sind. Hierdurch ergibt sich eine ebene Anlagefläche zwischen dem Ventilkörper 4 und dem Haltekörper 5, so dass eine Verbindung zwischen Ventilkörper 4 und Haltekörper 5 mittels einer Schweißverbindung 18 hergestellt werden kann.For quick assembly, a centering collar 42 is further formed on the valve body 4. How out FIG. 1 it can be seen, the centering collar 42 is inserted into the second through hole 50 of the holding body 5. In this case, a first contact surface 41 and on the holding body 5, a second contact surface 51 is further formed on the valve body 4, which are each aligned perpendicular to the axial direction XX. This results in a planar contact surface between the valve body 4 and the holding body 5, so that a connection between the valve body 4 and holding body 5 can be made by means of a welded joint 18.

Wie weiter aus Figur 2 ersichtlich ist, ist am Ventilkörper 4 zwischen dem ersten Führungsbereich 11 und einem Kraftstoffaustritt 61 ein zylinderringförmiger Strömungsbereich 62 angeordnet. Der zylinderringförmige Strömungsbereich 62 ist dabei zwischen der Nadel 3 und der Durchgangsöffnung 40 des Ventilkörpers 4 gebildet. Der zylinderringförmige Strömungsbereich 62 weist dabei eine Ringfläche C auf. Wie weiter aus Figur 2 ersichtlich ist, ist eine Ringfläche D senkrecht zur Strömungsrichtung bei vollständig geöffnetem Ventil zwischen der Ventilnadel 3 und dem Ventilsitz 13 vorhanden, wobei die Ringfläche D ungefähr halb so groß ist wie die Ringfläche C. Ferner ist eine Länge L des zylinderringförmigen Strömungsbereichs 62 ungefähr vier Mal so groß wie eine Breite des zylinderringförmigen Strömungsbereichs 62. Die Breite ist dabei der radiale Abstand zwischen der Nadel und der Wandfläche der Durchgangsöffnung 40 am Strömungsbereich 62. Durch das Vorsehen des zylinderringförmigen Strömungsbereichs 62 kann somit bei vollständig geöffnetem Ventil eine verbesserte Strömung mit reduzierten Verwirbelungen erreicht werden, so dass ein Spray, in Figur 2 durch "S" gekennzeichnet, in definierter Weise ausgespritzt werden kann. An der Ventilnadel 3 ist ferner ein Radius R am Übergang zum zylinderringförmigen Bereich gebildet.How farther FIG. 2 it can be seen, a cylindrical annular flow region 62 is arranged on the valve body 4 between the first guide region 11 and a fuel outlet 61. The cylindrical annular flow region 62 is formed between the needle 3 and the passage opening 40 of the valve body 4. The cylindrical annular flow region 62 in this case has an annular surface C. How farther FIG. 2 is apparent, an annular surface D is perpendicular to the flow direction with the valve fully open between the valve needle 3 and the valve seat 13, wherein the annular surface D is about half as large as the annular surface C. Further, a length L of the cylindrical annular flow region 62 is about four times The width is the radial distance between the needle and the wall surface of the passage opening 40 at the flow area 62. Thus, with the provision of the cylindrical annular flow area 62, an improved flow with reduced turbulences can be achieved with the valve fully open be, so a spray, in FIG. 2 characterized by "S", can be injected in a defined manner. At the valve needle 3, a radius R is further formed at the transition to the cylindrical annular region.

Die Funktion des erfindungsgemäßen Injektors ist dabei wie folgt. Soll eine Einspritzung erfolgen, wird der Piezoaktor 2 aktiviert, wodurch die Ventilnadel 3 in Richtung des Pfeils B bewegt wird und vom Ventilsitz 13 abhebt. Kraftstoff kann dadurch durch den geöffneten Injektor eingespritzt werden. Die Bewegung der Ventilnadel 3 erfolgt dabei entgegen der Federkraft der Rückstellfeder 7, welche durch den Hub der Ventilnadel 3 vorgespannt wird. Soll die Einspritzung wieder beendet werden, wird der Piezoaktor wieder deaktiviert und der Injektor wird automatisch durch die vorgespannte Rückstellfeder 7 wieder in die in Figur 1 gezeigte Ausgangsstellung zurückgestellt und die Ventilnadel 3 liegt am Ventilsitz 13 fest an und dichtet dort in bekannter Weise ab.The function of the injector according to the invention is as follows. If an injection takes place, the piezoelectric actuator 2 is activated, whereby the valve needle 3 is moved in the direction of the arrow B and lifts off from the valve seat 13. Fuel can thereby be injected through the opened injector. The movement The valve needle 3 takes place counter to the spring force of the return spring 7, which is biased by the stroke of the valve needle 3. If the injection is terminated again, the piezoelectric actuator is deactivated again and the injector is automatically returned to the in. By the biased return spring 7 FIG. 1 shown reset initial position and the valve needle 3 is located on the valve seat 13 firmly and seals there in a known manner.

Somit kann erfindungsgemäß ein nach außen öffnender Injektor bereitgestellt werden, welcher insbesondere einen vereinfachten und kostengünstigeren Aufbau als im Stand der Technik aufweist. Wie weiter aus Figur 1 ersichtlich ist, ist eine Länge L1 des Ventilkörpers 4 in Axialrichtung X-X kleiner als eine Länge L2 des Haltekörpers 5 in Axialrichtung X-X. Somit kann ein kurzer und einfach geformter Ventilkörper 4 bereitgestellt werden, wobei die Durchgangsöffnung 40 im Ventilkörper 4 ohne einen Hinterschnitt gebildet ist. Dadurch kann insbesondere die Durchgangsbohrung sehr einfach hergestellt werden. Da ferner der Dichtsitz 13 und der erste Führungsbereich 11 am Ventilkörper 4 unmittelbar benachbart zueinander sind, kann auch eine Herstellung dieser Flächen in einer Aufspannung von der gleichen Seite her erfolgen. Somit müssen nicht, wie im Stand der Technik, zwei separate Führungsflächen am Ventilkörper 4 bearbeitet werden, was die Herstellung des Ventilkörpers 4 signifikant verteuert. Erfindungsgemäß kann die zum Haltekörper 5 gerichtete Seite des Ventilkörpers 4 kostengünstig mittels einer Drehbearbeitung hergestellt werden.Thus, according to the invention, an outwardly opening injector can be provided, which in particular has a simplified and less expensive construction than in the prior art. How farther FIG. 1 is apparent, a length L1 of the valve body 4 in the axial direction XX is smaller than a length L2 of the holding body 5 in the axial direction XX. Thus, a short and simply shaped valve body 4 can be provided, wherein the through-hole 40 is formed in the valve body 4 without an undercut. As a result, in particular the through hole can be made very easily. Further, since the sealing seat 13 and the first guide portion 11 on the valve body 4 are immediately adjacent to each other, a production of these surfaces can be carried out in a clamping from the same side. Thus, as in the prior art, two separate guide surfaces need not be machined on the valve body 4, which significantly increases the cost of manufacturing the valve body 4. According to the invention, the side directed towards the holding body 5 of the valve body 4 can be produced inexpensively by means of a turning operation.

Weiter kann erfindungsgemäß auf einfache Weise die Schließkraft der Rückstellfeder 7 eingestellt werden, indem der Federteller 8 an einer entsprechenden Position an der Ventilnadel 3 befestigt wird. Wie weiter aus Figur 1 ersichtlich ist, ist der Wellbalg 9 vollständig im Haltekörper 5 angeordnet. Durch diese Anordnung ist es möglich, dass der Wellbalg 9 kostengünstig als einlagiges Metallelement vorgesehen werden kann, da im Haltekörper 5 ausreichender Raum zur Anordnung des Wellbalgs 9 vorhanden ist. Insbesondere kann dadurch ein Wellbalg 9 verwendet werden, welcher in Axialrichtung X-X relativ lang ist. Hierdurch kann der Wellbalg 9 eine Vielzahl von Wellen aufweisen, um die auf ihn einwirkenden Biegebelastungen ausreichend aufzunehmen. Ein weiterer Vorteil der Erfindung liegt darin, dass erfindungsgemäß die Buchse 6 verwendet werden kann, welche in Axialrichtung X-X ebenfalls eine vergrößerte Länge aufweist. Hierdurch kann ein Abstand zwischen der Schweißverbindung 16 zum Haltekörper 5 und dem zweiten Führungsabschnitt 32 größer ausgelegt werden. Hierdurch ist es möglich, dass die Buchse 6 vergütet werden kann, weil sich durch den Schweißvorgang kein Härteabfall am Führungsbereich ergibt. Die vergütete Buchse weist dabei weniger Verschleiß auf, insbesondere, wenn Querkräfte auf die Ventilnadel 3 wirken. Der Federteller 8 ist sehr kostengünstig als einfaches Tiefziehteil herstellbar. Hierbei kann insbesondere auf einen Federzentrierbund am Federteller verzichtet werden.Furthermore, according to the invention, the closing force of the return spring 7 can be adjusted in a simple manner by fixing the spring plate 8 at a corresponding position on the valve needle 3. How farther FIG. 1 it can be seen, the corrugated bellows 9 is arranged completely in the holding body 5. By this arrangement, it is possible that the corrugated bellows 9 can be inexpensively provided as a single-layer metal element, since in the holding body 5 sufficient space for the arrangement of the corrugated bellows 9 is present. In particular, a bellows 9 can thereby be used, which is relatively long in the axial direction XX. In this way, the corrugated bellows 9 can have a multiplicity of waves in order to absorb the bending loads acting on it sufficiently. Another advantage of the invention is that according to the invention, the bushing 6 can be used, which also has an enlarged length in the axial direction XX. This allows a distance between the welded joint 16 to the holding body 5 and the second guide portion 32 are designed to be larger. This makes it possible that the bushing 6 can be tempered, because there is no hardness drop at the guide area by the welding process. The tempered bushing has less wear, especially when lateral forces act on the valve needle 3. The spring plate 8 is very inexpensive to produce as a simple deep-drawn part. In this case, in particular, a spring centering collar on the spring plate can be dispensed with.

Gegenüber dem Stand der Technik weist der erfindungsgemäße Injektor somit eine Vielzahl von Verbesserungen auf, welche insgesamt eine deutliche Kosteneinsparung bei der Herstellung des Injektors ermöglichen. Insbesondere das Vorsehen des hinterschneidungsfreien Ventilkörpers 4 senkt die Herstellungskosten signifikant.Compared to the prior art, the injector according to the invention thus has a number of improvements, which overall allow a significant cost savings in the manufacture of the injector. In particular, the provision of the undercut-free valve body 4 reduces the manufacturing costs significantly.

Nachfolgend wird unter Bezugnahme auf Figur 3 eine Vorrichtung 1 zum Einspritzen von Kraftstoff gemäß einem zweiten Ausführungsbeispiel der Erfindung im Detail beschrieben. Gleiche bzw. funktional gleiche Teile sind dabei mit den gleichen Bezugszeichen wie im ersten Ausführungsbeispiel bezeichnet.The following is with reference to FIG. 3 a device 1 for injecting fuel according to a second embodiment of the invention described in detail. Identical or functionally identical parts are denoted by the same reference numerals as in the first embodiment.

Im Unterschied zum ersten Ausführungsbeispiel weist die Vorrichtung des zweiten Ausführungsbeispiels an der Ventilnadel 3 einen dritten Führungsabschnitt 34 auf. Wie aus Figur 3 ersichtlich ist, ist der dritte Führungsabschnitt 34 benachbart zum ersten Führungsabschnitt 31 angeordnet. Am dritten Führungsabschnitt 34 wird die Ventilnadel 3 dabei wie beim ersten Führungsabschnitt 31 am Ventilkörper 4 geführt. Hierzu ist der erste Führungsbereich 11 in der Durchgangsöffnung 40 des Ventilkörpers in Axialrichtung X-X verlängert. Hierdurch muss zwar ein verlängerter erster Führungsbereich 11 in der Durchgangsöffnung 40 vorgesehen werden, allerdings wird die Ventilnadel 3 insbesondere nahe dem Ventilsitz 13 besser zur Mittelachse ausgerichtet. Somit kann wiederum in einem geöffneten Zustand der Vorrichtung ein Sitzspalt zwischen der Ventilnadel 3 und dem Ventilsitz 13 über den Umfang gleichförmiger sein, wodurch auch das ausgestoßene Kraftstoffspray über den Umfang gleichförmiger ist. Durch den geringen Abstand des ersten und dritten Führungsbereichs 31, 33 im Ventilkörper 4 können die Führungsbereiche jedoch wie im ersten Ausführungsbeispiel in einer Aufspannung von der Sitzseite her kostengünstig geschliffen werden. Ein weiterer Unterschied zum ersten Ausführungsbeispiel liegt in der Verbindung zwischen Ventilkörper 4 und Haltekörper 5. Wie aus Figur 3 ersichtlich ist, ist sowohl am Ventilkörper 4 ein Zentrierbund 42 als auch am Haltekörper 5 ein Zentrierbund 52 vorgesehen. Hierbei kann zwischen dem Zentrierbund 42 und dem Zentrierbund 52 eine Spielpassung oder eine Presspassung vorgesehen werden. Bei der Herstellung der Schweißverbindung 18 zwischen dem Ventilkörper 4 und dem Haltekörper 5 erwärmt sich insbesondere der Zentrierbund 52 des Haltekörpers 5 mehr als der radial weiter innenliegende Zentrierbund 42 des Ventilkörpers 4, weil der Zentrierbund 52 im Vergleich zum Zentrierbund 42 dünnwandiger ist. Beim Abkühlen der Bauteile schrumpft daher der Zentrierbund 52 des Haltekörpers 5 mehr als der Ventilkörper 4. Hierdurch wird der Ventilkörper 4 auf die axiale Kontaktfläche 51 am Haltekörper 5 gezogen und richtet sich daher sehr genau aus. Da der Schweißvorgang relativ weit von den Kontaktflächen 41, 51 in Axialrichtung X-X entfernt ist, wirken sich unterschiedliche Schweißverzüge entlang des Umfangs, wenn überhaupt, nur in sehr geringer Weise auf eine nicht axiale Ausrichtung von Ventilkörper 4 zum Haltekörper 5 aus.In contrast to the first exemplary embodiment, the device of the second exemplary embodiment has a third guide section 34 on the valve needle 3. How out FIG. 3 is apparent, the third guide portion 34 adjacent to the first guide portion 31 is arranged. At the third guide section 34, the valve needle 3 is guided on the valve body 4 as in the first guide section 31. For this purpose, the first guide portion 11 is extended in the passage opening 40 of the valve body in the axial direction XX. In this way, although an extended first guide portion 11 must be provided in the through hole 40, but the valve needle 3 is aligned better in particular near the valve seat 13 to the central axis. Thus, again in an open state of the device, a seat gap between the valve needle 3 and the valve seat 13 may be more uniform circumferentially, whereby the ejected fuel spray is more uniform over the circumference. Due to the small distance between the first and third guide region 31, 33 in the valve body 4, however, the guide regions can be ground inexpensively, as in the first exemplary embodiment, in a clamping from the seat side. One Another difference from the first embodiment lies in the connection between the valve body 4 and the holding body 5. As from FIG. 3 it can be seen, a centering collar 52 is provided both on the valve body 4 and a centering collar 52 on the holding body 5. Here, between the centering collar 42 and the centering collar 52, a clearance fit or a press fit may be provided. In the manufacture of the welded joint 18 between the valve body 4 and the holding body 5, in particular the centering collar 52 of the holding body 5 heats up more than the radially inner centering collar 42 of the valve body 4, because the centering collar 52 is thin-walled compared to the centering collar 42. As the components cool, therefore, the centering collar 52 of the holding body 5 shrinks more than the valve body 4. As a result, the valve body 4 is pulled onto the axial contact surface 51 on the holding body 5 and therefore aligns very accurately. Since the welding operation is relatively far away from the contact surfaces 41, 51 in the axial direction XX, different welding distortions along the circumference, if at all, have a very slight effect on a non-axial alignment of the valve body 4 with the holding body 5.

Claims (11)

  1. Apparatus for injecting fuel, comprising:
    - a valve needle (3) which opens towards the outside,
    - a piezoelectric actuator (2) which is connected to the valve needle (3),
    - a valve body (4) with a first through opening (40), and
    - a holding body (5) which is connected to the valve body (4) and has a second through opening (50),
    - the valve body (4) having a valve seat (13) and a first guide region (11) for guiding the valve needle (3),
    - the valve needle (3) being arranged in the valve body (4) and in the holding body (5), and
    - the first through opening (40) being configured in the valve body (4) without an undercut,
    characterized
    in that the valve body (4) has a contact face (41) and the holding body (5) has a contact face (51), the two contact faces (41, 51) being in contact with one another and being arranged perpendicularly with respect to a centre axis (X-X) of the apparatus, and both a centring collar (42) being provided on the valve body (4) and a centring collar (52) being provided on the holding body (5), the radially outer centring collar (52) on the holding body (5) having thinner walls in comparison with the radially inner centring collar (42) of the valve body (4).
  2. Apparatus according to Claim 1, characterized by a second guide region (12), on which the valve needle (3) is guided which is configured on a bush (6) which is arranged in the holding body (5).
  3. Apparatus according to either of the preceding claims, comprising, furthermore, a corrugated bellows (9) for sealing a region (20) which is filled with fuel from a fuel-free region (21), a first end (9a) of the corrugated bellows (9) being fastened directly to the valve needle (3).
  4. Apparatus according to Claim 3, characterized in that the metal bellows (9) is produced from a single-layer metal material.
  5. Apparatus according to Claim 3 or 4, characterized in that a second end (9b) of the corrugated bellows (9) is fastened to the bush (6) which is arranged in the holding body (5).
  6. Apparatus according to one of the preceding claims, comprising, furthermore, a restoring element (7) which is supported at one end on the holding body (5).
  7. Apparatus according to Claim 6, comprising, furthermore, a collar element (8) which is preferably deep-drawn from sheet metal, is fastened directly to the valve needle (3), and on which the restoring element (7) is supported.
  8. Apparatus according to one of the preceding claims, characterized in that the valve body (4) has a length (L1) which is smaller than the length (L2) of the holding body (5), preferably smaller by more than half.
  9. Apparatus according to one of the preceding claims, characterized in that the valve needle (3) has a third guide section (34) which is arranged adjacently with respect to the first guide section (31), the first and third guide sections (31, 34) being guided on a common guide region (11).
  10. Apparatus according to one of the preceding claims, comprising, furthermore, a cylindrical ring-shaped flow region (62) which is arranged between the first guide region (11) and the valve seat (13), an area (C) of the cylindrical ring-shaped flow region (62) being approximately twice as large as a cylindrical ring-shaped outlet area (D) on the valve seat (13) when the valve needle (3) is opened completely.
  11. Apparatus according to Claim 10, characterized in that the cylindrical ring-shaped flow region (62) has a length (L) which is approximately from two to five times, preferably four times, as long as a width of the cylindrical ring-shaped flow region (62).
EP11758220.5A 2010-10-14 2011-09-21 Fuel injection device Not-in-force EP2627891B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010042476A DE102010042476A1 (en) 2010-10-14 2010-10-14 Device for injecting fuel
PCT/EP2011/066446 WO2012048999A2 (en) 2010-10-14 2011-09-21 Fuel injection device

Publications (2)

Publication Number Publication Date
EP2627891A2 EP2627891A2 (en) 2013-08-21
EP2627891B1 true EP2627891B1 (en) 2016-08-31

Family

ID=44654132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11758220.5A Not-in-force EP2627891B1 (en) 2010-10-14 2011-09-21 Fuel injection device

Country Status (5)

Country Link
US (1) US20130284828A1 (en)
EP (1) EP2627891B1 (en)
JP (1) JP5865911B2 (en)
DE (1) DE102010042476A1 (en)
WO (1) WO2012048999A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212433A1 (en) 2012-07-16 2014-01-30 Robert Bosch Gmbh Valve for measuring fluid, has measuring orifice and axially sliding valve needle which carries closure head plunging into measuring orifice from outside for selective closing and opening of measuring orifice

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61144399U (en) * 1985-02-26 1986-09-05
DE3727366A1 (en) * 1987-08-17 1989-03-02 Bosch Gmbh Robert Fuel injection nozzle for internal combustion engines
AU647770B2 (en) * 1990-01-26 1994-03-31 Orbital Australia Pty Ltd Fuel injector nozzle
JPH0449660U (en) * 1990-08-31 1992-04-27
DE19912666A1 (en) * 1999-03-20 2000-09-21 Bosch Gmbh Robert Fuel injector
EP1046809B1 (en) * 1999-04-20 2005-08-10 Siemens Aktiengesellschaft Fluid metering device
DE19940056A1 (en) * 1999-08-24 2001-03-22 Siemens Ag Dosing device and method for dosing
EP1325226B1 (en) * 2000-10-11 2006-12-20 Siemens VDO Automotive Corporation Compensator assembly having a flexible diaphragm and an internal filling tube for a fuel injector and method
KR100588766B1 (en) * 2000-11-02 2006-06-14 지멘스 악티엔게젤샤프트 Fluid dosing device with a throttle point
DE10123218A1 (en) * 2001-05-12 2002-11-14 Bosch Gmbh Robert Valve for controlling liquids, especially fuel injection valve for storage injection system, has movement controller between piezo-actuator, valve element, stop limiting valve element movement
DE10204655A1 (en) * 2002-02-05 2003-08-28 Bosch Gmbh Robert Fuel injector
DE10226649A1 (en) * 2002-06-14 2004-01-08 Siemens Ag Dosing device for fluids, in particular motor vehicle injection valve
EP1391607A1 (en) * 2002-08-20 2004-02-25 Siemens VDO Automotive S.p.A. Metering device
DE60304442T2 (en) * 2003-01-24 2006-08-24 Siemens Vdo Automotive S.P.A., Fauglia Measuring device with flow calibration device and method for adjusting the flow rate of the measuring device
DE10344880A1 (en) * 2003-09-26 2005-04-14 Robert Bosch Gmbh Fuel injector
DE602004030419D1 (en) * 2004-02-27 2011-01-20 Continental Automotive Italy S P A liquid injector
DE102004024119B4 (en) * 2004-05-14 2006-04-20 Siemens Ag Nozzle assembly and injector
DE602005008206D1 (en) * 2005-05-09 2008-08-28 Siemens Ag Injection valve and valve group for the injection valve
DE102005025952B4 (en) * 2005-06-06 2009-01-29 Continental Automotive Gmbh Method for producing a valve
ATE488688T1 (en) * 2006-03-06 2010-12-15 Delphi Technologies Holding FUEL INJECTION PUMP
JP4757073B2 (en) * 2006-03-29 2011-08-24 株式会社ケーヒン Fuel injection valve
JP2010101256A (en) * 2008-10-24 2010-05-06 Keihin Corp Solenoid type fuel injection valve

Also Published As

Publication number Publication date
JP5865911B2 (en) 2016-02-17
DE102010042476A1 (en) 2012-04-19
EP2627891A2 (en) 2013-08-21
US20130284828A1 (en) 2013-10-31
WO2012048999A2 (en) 2012-04-19
WO2012048999A3 (en) 2012-08-16
JP2013539838A (en) 2013-10-28

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