EP1407135B1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- EP1407135B1 EP1407135B1 EP02742713A EP02742713A EP1407135B1 EP 1407135 B1 EP1407135 B1 EP 1407135B1 EP 02742713 A EP02742713 A EP 02742713A EP 02742713 A EP02742713 A EP 02742713A EP 1407135 B1 EP1407135 B1 EP 1407135B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection valve
- screw thread
- nozzle body
- labyrinth seal
- 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
Links
- 239000000446 fuel Substances 0.000 title claims description 38
- 238000002347 injection Methods 0.000 title claims description 37
- 239000007924 injection Substances 0.000 title claims description 37
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—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
-
- 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
-
- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
Definitions
- the invention relates to a fuel injection valve according to the preamble of independent claim 1.
- DE 198 49 210 A1 discloses a fuel injection valve which has a nozzle body which is tubular on its downstream side and at the downstream end of which a sealing seat and an injection orifice are arranged.
- the tubular part of the nozzle body is insertable into a receiving bore of a cylinder head.
- the nozzle body is sealed with a seal which has approximately the geometry of a hollow cylinder.
- the nozzle body has a circumferential groove, which is introduced for example by twisting off the nozzle body and in which the seal is used.
- materials elastic materials can be used, which can be pushed over the nozzle body for mounting in the groove.
- a fuel injection valve in which a sealing element is arranged on the nozzle body.
- the gasket is made of a metallic material and expands in the radial direction under the influence of the temperature produced by the combustion process. This can be done either by a shape memory alloy or by the use of a bimetallic seal.
- a groove can be used in the nozzle body.
- the metal sealing ring heats up and expands. This increases the sealing effect during operation.
- the metal gasket has a slightly smaller diameter than the fuel injection valve receiving bore which is inserted in the cylinder head.
- a disadvantage of the sealing solution specified in DE 198 49 210 A1 is primarily the high temperature acting on the seal. Particularly in the case of direct-injection internal combustion engines, solid-gas strength of non-metallic sealing materials can not be ensured.
- a shape memory alloy has a transition temperature tailored to the application. In order to be able to reliably ensure this transition temperature, a narrow margin in terms of the manufacturing process is usually required. As a result, not only the development costs for the alloy but also the costs for use in a series production are increased.
- bimetallic seal requires a fixation of the seal on the nozzle body, which serves as an abutment during deformation.
- mounting the bimetal in a groove, for example, is difficult because the properties of the material change when one of the two metals undergoes non-elastic deformation during assembly.
- the fuel injection valve according to the invention with the characterizing feature of claim 1 has the advantage that the nozzle body and a magnet pot, in which the magnetic circuit of the fuel injection valve is sealed, are sealed by means of a thread-shaped labyrinth seal against an environment of the fuel injection valve.
- the labyrinth seal on two to three turns, which have a radial amplitude of about 0.5 mm in order to achieve a reliable sealing effect.
- a further advantage is that the labyrinth seal by means of simple manufacturing process with the aid of a Thread cutting tool or an internal mandrel can be done without chipping.
- the shape of the thread is not limited to round cross-sections, but arbitrarily elliptical or oval can be produced.
- a fuel injection valve 1 shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
- the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
- the fuel injection valve 1 comprises a sleeve-shaped nozzle body 2, in which, for example, a valve needle not shown can be arranged.
- the fuel injection valve 1 is an electromagnetically actuated fuel injection valve 1.
- the nozzle body 2 passes through a magnetic coil 3, which is wound on a bobbin 4.
- the magnet coil 3 is encapsulated in a magnet pot 6, which is sealed by a inventively designed labyrinth seal 5 against an environment of the fuel injection valve 1.
- FIG. 2 A detailed representation of the labyrinth seal 5 of the fuel injection valve 1 according to the invention is shown in FIG. 2 and the following description.
- the magnetic coil 3 is energized via a line, not shown, from an electrical current which can be supplied via an electrical plug contact 7.
- the plug contact is surrounded by a plastic casing 8, which may be molded on the nozzle body 2.
- FIG. 2 shows, in an excerpted sectional view, the region of the exemplary embodiment of a fuel injection valve 1 designed in accordance with FIG. 1 and designated II in FIG. 1.
- the magnetic coil 3 and the nozzle body 2 of the inventively designed fuel injector 1 are, as already mentioned, equipped with a labyrinth seal 5, which seals the surrounded by the plastic casing 8 components against the environment of the fuel injector 1 and this thus z. B. protects dirt and saltwater.
- the labyrinth seal 5 is thread-shaped and comprises at least two, better three thread grooves 9.
- a radial distance between a low point 10 of each thread groove 9 and a high point 11 of each thread groove should be at least 0.5 mm.
- the shape of the thread is arbitrary. The easiest way to produce a round thread, but there are also elliptical cross-sections conceivable.
- the labyrinth seal 5 is used to protect the region surrounded by the plastic casing 8 with the nozzle body 2 from aggressive media in the vicinity of the fuel injection valve 1.
- a labyrinth seal 5 configured in a thread-like manner according to the fuel injection valve 1 according to the invention allows a rotary demolding of the tool producing the labyrinth seal 5, which eliminates reworking and simplifies the manufacturing process and thus becomes less costly.
- the labyrinth seal 5 can be produced for example by deep-drawing or extrusion, wherein the thread grooves 9 are made by means of a thread cutting tool. Also by means of round hammers or rotary kneading a thread-shaped labyrinth seal 5 can be designed with the aid of a thread-shaped inner mandrel.
- the invention is not limited to the illustrated embodiment of an inventively designed fuel injector 1 and suitable for any construction of fuel injection valves 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach dem Oberbegriff des unabhängigen Anspruchs 1.The invention relates to a fuel injection valve according to the preamble of independent claim 1.
Beispielsweise ist aus der DE 198 49 210 A1 ein Brennstoffeinspritzventil bekannt, das einen auf seiner stromabwärtigen Seite rohrförmigen Düsenkörper aufweist, an dessen stromabwärtigen Ende ein Dichtsitz und eine Abspritzöffnung angeordnet sind. Der rohrförmige Teil des Düsenkörpers ist in eine Aufnahmebohrung eines Zylinderkopfs einführbar. Gegenüber der Aufnahmebohrung des Zylinderkopfs, die einen mit der radialen Ausdehnung des Düsenkörpers korrespondierenden Durchmesser aufweist, ist der Düsenkörper mit einer Dichtung abgedichtet, die näherungsweise die Geometrie eines Hohlzylinders aufweist.For example, DE 198 49 210 A1 discloses a fuel injection valve which has a nozzle body which is tubular on its downstream side and at the downstream end of which a sealing seat and an injection orifice are arranged. The tubular part of the nozzle body is insertable into a receiving bore of a cylinder head. Compared to the receiving bore of the cylinder head, which has a diameter corresponding to the radial extent of the nozzle body, the nozzle body is sealed with a seal which has approximately the geometry of a hollow cylinder.
Zur Lagefixierung der Dichtung auf dem Düsenkörper weist der Düsenkörper eine umlaufende Nut auf, die beispielsweise durch Abdrehen des Düsenkörpers eingebracht wird und in die die Dichtung eingesetzt wird. Als Materialien können elastische Materialien eingesetzt werden, die sich zur Montage in der Nut über den Düsenkörper schieben lassen.To fix the position of the seal on the nozzle body, the nozzle body has a circumferential groove, which is introduced for example by twisting off the nozzle body and in which the seal is used. As materials elastic materials can be used, which can be pushed over the nozzle body for mounting in the groove.
Weiterhin ist auch aus der DE 198 08 068 A1 ein Brennstoffeinspritzventil bekannt, bei dem auf dem Düsenkörper ein Dichtelement angeordnet ist. Die Dichtung ist aus einem metallischen Werkstoff und dehnt sich in radiale Richtung unter dem Einfluß der Temperatur, die durch den Verbrennungsvorgang entsteht, aus. Dies kann entweder durch eine Formgedächtnislegierung geschehen oder durch die Verwendung einer Bimetalldichtung. Zur Fixierung kann wie bei der DE 198 49 210 A1 eine Nut in dem Düsenkörper verwendet werden.Furthermore, from DE 198 08 068 A1 a fuel injection valve is known in which a sealing element is arranged on the nozzle body. The gasket is made of a metallic material and expands in the radial direction under the influence of the temperature produced by the combustion process. This can be done either by a shape memory alloy or by the use of a bimetallic seal. For fixing, as in DE 198 49 210 A1, a groove can be used in the nozzle body.
Im Betrieb der Brennkraftmaschine erwärmt sich der Metalldichtring und dehnt sich aus. Damit wird im Betrieb die Dichtwirkung erhöht. Zur leichteren Montage weist die Metalldichtung einen geringfügig kleineren Durchmesser auf, als die Aufnahmebohrung für das Brennstoffeinspritzventil, die in den Zylinderkopf eingebracht ist.During operation of the internal combustion engine, the metal sealing ring heats up and expands. This increases the sealing effect during operation. For ease of assembly, the metal gasket has a slightly smaller diameter than the fuel injection valve receiving bore which is inserted in the cylinder head.
Nachteilig bei der in der DE 198 49 210 A1 angegebenen Dichtungslösung ist in erster Linie die auf die Dichtung einwirkende hohe Temperatur. Insbesondere bei direkteinspritzenden Brennkraftmaschinen ist eine Vollgasfestigkeit nichtmetallischer Dichtungsmaterialien nicht sicherzustellen.A disadvantage of the sealing solution specified in DE 198 49 210 A1 is primarily the high temperature acting on the seal. Particularly in the case of direct-injection internal combustion engines, solid-gas strength of non-metallic sealing materials can not be ensured.
Das in der DE 198 08 068 A1 offenbarte Brennstoffeinspritzventil hat den Nachteil, daß die Dichtwirkung der metallischen Dichtung temperaturabhängig ist. Nach einem Kaltstart der Brennkraftmaschine dauert es, bis sich durch den Verbrennungsvorgang die Materialien im Umfeld des Brennraums soweit erwärmt haben, daß durch die Wärmeleitung die Temperatur in der Dichtung erreicht ist, welche zu der erforderlichen Formänderung führt. Daher ist zusätzlich zu der vorgestellten Dichtung eine weitere Dichtung erforderlich, um den Brennraum bei Betriebsbeginn der Brennkraftmaschine gegen den Außenraum abzudichten, so daß kein Kompressionsdruck verloren geht.The disclosed in DE 198 08 068 A1 fuel injection valve has the disadvantage that the sealing effect of the metallic seal is temperature dependent. After a cold start of the internal combustion engine, it takes until the materials in the vicinity of the combustion chamber have heated up to such an extent by the combustion process that the temperature in the gasket is reached by the heat conduction, which leads to the required change in shape. Therefore, in addition to the presented seal another seal is required to seal the combustion chamber at the beginning of operation of the internal combustion engine to the outside, so that no compression pressure is lost.
Weiterhin nachteilig sind die aufwendigen Materialien, die bei der Herstellung sich temperaturabhängig verformender Metalldichtungen zum Einsatz kommen. Eine Formgedächtnislegierung weist eine auf den Einsatzzweck abgestimmte Übergangstemperatur auf. Um diese Übergangstemperatur sicher gewährleisten zu können, ist meist ein enger Spielraum hinsichtlich des Herstellverfahrens erforderlich. Dadurch werden nicht nur die Entwicklungskosten für die Legierung sondern auch die Kosten bei einem Einsatz in einer Serienfertigung erhöht.Another disadvantage is the expensive materials that are used in the production of temperature-dependent deforming metal seals. A shape memory alloy has a transition temperature tailored to the application. In order to be able to reliably ensure this transition temperature, a narrow margin in terms of the manufacturing process is usually required. As a result, not only the development costs for the alloy but also the costs for use in a series production are increased.
Die Verwendung einer Bimetalldichtung erfordert eine Fixierung der Dichtung an dem Düsenkörper, der bei der Verformung als Gegenlager dient. Eine Montage des Bimetalls in einer Nut beispielsweise ist jedoch schwierig, da sich die Eigenschaften des Materials ändern, wenn eines der beiden Metalle eine nicht elastische Verformung bei der Montage erfährt.The use of a bimetallic seal requires a fixation of the seal on the nozzle body, which serves as an abutment during deformation. However, mounting the bimetal in a groove, for example, is difficult because the properties of the material change when one of the two metals undergoes non-elastic deformation during assembly.
Das erfindungsgemäße Brennstoffeinspritzventil mit dem kennzeichnenden Merkmal des Anspruchs 1 hat demgegenüber den Vorteil, daß der Düsenkörper und ein Magnettopf, in welchem der Magnetkreis des Brennstoffeinspritzventils gekapselt ist, mittels einer gewindeförmigen Labyrinthdichtung gegenüber einer Umgebung des Brennstoffeinspritzventils abgedichtet sind.The fuel injection valve according to the invention with the characterizing feature of claim 1 has the advantage that the nozzle body and a magnet pot, in which the magnetic circuit of the fuel injection valve is sealed, are sealed by means of a thread-shaped labyrinth seal against an environment of the fuel injection valve.
Gemäß den in den Abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des erfindungsgemäßen Brennstoffeinspritzventils möglich.According to the measures listed in the dependent claims advantageous developments of the fuel injection valve according to the invention are possible.
Vorteilhafterweise weist die Labyrinthdichtung zwei bis drei Windungen auf, welche eine radiale Amplitude von ca. 0,5 mm aufweisen, um eine zuverlässige Dichtwirkung zu erzielen.Advantageously, the labyrinth seal on two to three turns, which have a radial amplitude of about 0.5 mm in order to achieve a reliable sealing effect.
Weiterhin ist von Vorteil, daß die Labyrinthdichtung mittels einfacher Herstellungsverfahren unter Zuhilfenahme eines Gewindefurchwerkzeugs oder eines Innendorns ohne spanende Nachbearbeitung erfolgen kann.A further advantage is that the labyrinth seal by means of simple manufacturing process with the aid of a Thread cutting tool or an internal mandrel can be done without chipping.
Von Vorteil ist auch, daß die Form des Gewindes nicht auf runde Querschnitte beschränkt ist, sondern beliebig ellipsenförmig oder oval herstellbar ist.Another advantage is that the shape of the thread is not limited to round cross-sections, but arbitrarily elliptical or oval can be produced.
Ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils ist in der Zeichnung vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigt:
- Fig. 1
- einen schematischen Teilschnitt durch ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils, und
- Fig. 2
- einen Ausschnitt aus dem in Fig. 1 dargestellten Ausführungsbeispiel eines erfindungsgemäß Brennstoffeinspritzventils 1 im Bereich II in Fig. 1.
- Fig. 1
- a schematic partial section through an embodiment of a fuel injection valve according to the invention, and
- Fig. 2
- a detail of the embodiment shown in Fig. 1 of an inventive fuel injection valve 1 in area II in Fig. 1st
Ein in Fig. 1 dargestelltes Brennstoffeinspritzventil 1 ist in der Form eines Brennstoffeinspritzventils 1 für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen ausgeführt. Das Brennstoffeinspritzventil 1 eignet sich insbesondere zum direkten Einspritzen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraftmaschine.A fuel injection valve 1 shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines. The fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
Das Brennstoffeinspritzventil 1 umfaßt einen hülsenförmigen Düsenkörper 2, in welchem beispielsweise eine nicht weiter dargestellte Ventilnadel angeordnet sein kann. Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein elektromagnetisch betätigtes Brennstoffeinspritzventil 1. Der Düsenkörper 2 durchgreift eine Magnetspule 3, welche auf einen Spulenträger 4 gewickelt ist. Die Magnetspule 3 ist in einem Magnettopf 6 gekapselt, welcher durch eine erfindungsgemäß ausgestaltete Labyrinthdichtung 5 gegen eine Umgebung des Brennstoffeinspritzventils 1 abgedichtet ist.The fuel injection valve 1 comprises a sleeve-
Eine detaillierte Darstellung der Labyrinthdichtung 5 des erfindungsgemäßen Brennstoffeinspritzventils 1 ist Fig. 2 und der nachfolgenden Beschreibung zu entnehmen.A detailed representation of the
Die Magnetspule 3 wird über eine nicht weiter dargestellte Leitung von einem über einen elektrischen Steckkontakt 7 zuführbaren elektrischen Strom erregt. Der Steckkontakt ist von einer Kunststoffummantelung 8 umgeben, die am Düsenkörper 2 angespritzt sein kann.The
Fig. 2 zeigt in einer auszugsweisen Schnittdarstellung den in Fig. 1 mit II bezeichneten Bereich des in Fig. 1 dargestellten Ausführungsbeispiels eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1.FIG. 2 shows, in an excerpted sectional view, the region of the exemplary embodiment of a fuel injection valve 1 designed in accordance with FIG. 1 and designated II in FIG. 1.
Die Magnetspule 3 und der Düsenkörper 2 des erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1 sind, wie bereits erwähnt, mit einer Labyrinthdichtung 5 ausgestattet, welche die von der Kunststoffummantelung 8 umgebenen Bauteile gegenüber der Umgebung des Brennstoffeinspritzventils 1 abdichtet und diese somit vor z. B. Schmutz und Salzwasser schützt.The
Die Labyrinthdichtung 5 ist dabei gewindeförmig ausgeführt und umfaßt zumindest zwei, besser drei Gewinderillen 9. Ein radialer Abstand zwischen einem Tiefpunkt 10 jeder Gewinderille 9 und einem Hochpunkt 11 jeder Gewinderille sollte dabei zumindest 0,5 mm betragen.The
Die Form des Gewindes ist dabei beliebig. Am einfachsten herstellbar ist ein Rundgewinde, es sind jedoch auch elliptische Querschnitte denkbar.The shape of the thread is arbitrary. The easiest way to produce a round thread, but there are also elliptical cross-sections conceivable.
Die Labyrinthdichtung 5 wird eingesetzt, um den von der Kunststoffummantelung 8 umgebenen Bereich mit dem Düsenkörper 2 vor aggressiven Medien in der Umgebung des Brennstoffeinspritzventils 1 zu schützen. Eine gemäß dem erfindungsgemäßen Brennstoffeinspritzventil 1 gewindeförmig ausgestaltete Labyrinthdichtung 5 erlaubt eine rotatorische Entformung des die Labyrinthdichtung 5 herstellenden Werkzeugs, wodurch Nachbearbeitungen entfallen und der Herstellungsprozeß vereinfacht und dadurch weniger kostenintensiv wird.The
Die Labyrinthdichtung 5 ist beispielsweise durch Tiefziehen oder Fließpressen herstellbar, wobei die Gewinderillen 9 mittels eines Gewindefurchwerkzeugs angefertigt werden. Auch mittels Rundhämmerns oder Rundknetens kann unter Zuhilfenahme eines gewindeförmigen Innendorns eine gewindeförmige Labyrinthdichtung 5 gestaltet werden.The
Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1 beschränkt und für beliebige Bauweisen von Brennstoffeinspritzventilen 1 geeignet.The invention is not limited to the illustrated embodiment of an inventively designed fuel injector 1 and suitable for any construction of fuel injection valves 1.
Claims (6)
- Fuel injection valve (1) for fuel injection systems of internal combustion engines, with a nozzle body (2) and with a magnet coil (3) which is arranged in a magnet pot (6) and through which the nozzle body (2) passes, and with a plastic sheathing (8) which at least partially surrounds the nozzle body (2), characterized in that the nozzle body (2) and the magnet pot (6) are sealed off with respect to the surroundings of the fuel injection valve (1) by means of a labyrinth seal (5) in the form of a screw thread, which is located between the plastic sheathing (8) and the magnet pot (6).
- Fuel injection valve according to Claim 1, characterized in that the labyrinth seal (5) has at least two screw thread grooves (9).
- Fuel injection valve according to Claim 2, characterized in that a radial distance between a radially inner low point (10) and a radially outer high point (11) of the screw thread grooves (9) amounts to at least 0.5 mm.
- Fuel injection valve according to one of Claims 1 to 3, characterized in that the labyrinth seal (5) is produced by deep-drawing, extrusion or swaging.
- Fuel injection valve according to Claim 4, characterized in that the screw thread grooves (9) of the labyrinth seal (5) are produced by means of a screw thread rolling tool or of an inner mandrel in the form of a screw thread.
- Fuel injection valve according to one of Claims 1 to 5, characterized in that the screw thread grooves (9) have a round, oval or elliptic cross section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10133263A DE10133263A1 (en) | 2001-07-09 | 2001-07-09 | Fuel injector |
| DE10133263 | 2001-07-09 | ||
| PCT/DE2002/001634 WO2003006819A1 (en) | 2001-07-09 | 2002-05-07 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1407135A1 EP1407135A1 (en) | 2004-04-14 |
| EP1407135B1 true EP1407135B1 (en) | 2006-07-12 |
Family
ID=7691145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02742713A Expired - Lifetime EP1407135B1 (en) | 2001-07-09 | 2002-05-07 | Fuel injection valve |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7048253B2 (en) |
| EP (1) | EP1407135B1 (en) |
| JP (1) | JP2004521270A (en) |
| KR (1) | KR100853643B1 (en) |
| DE (2) | DE10133263A1 (en) |
| WO (1) | WO2003006819A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7611121B2 (en) * | 2004-07-16 | 2009-11-03 | Eagle Industry Co. Ltd. | Solenoid control device |
| DE102005033138B4 (en) * | 2005-07-15 | 2017-12-14 | Robert Bosch Gmbh | Fuel injector |
| DE102005040199A1 (en) * | 2005-08-25 | 2007-03-01 | Robert Bosch Gmbh | Piezo actuator with plug device and a method for its production |
| JP4211814B2 (en) * | 2006-07-13 | 2009-01-21 | 株式会社日立製作所 | Electromagnetic fuel injection valve |
| US8763362B1 (en) * | 2008-10-03 | 2014-07-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Injector element which maintains a constant mean spray angle and optimum pressure drop during throttling by varying the geometry of tangential inlets |
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|---|---|---|---|---|
| DE2210213C2 (en) * | 1972-03-03 | 1985-03-28 | Robert Bosch Gmbh, 7000 Stuttgart | Electromagnetically actuated fuel injection valve for internal combustion engines |
| DE2233919C3 (en) | 1972-07-10 | 1979-02-22 | Robert Bosch Gmbh, 7000 Stuttgart | Device for an injection nozzle for injecting fuel into the intake duct of an internal combustion engine |
| GB1415095A (en) * | 1973-01-23 | 1975-11-26 | Decca Ltd | Sealing assemblies |
| JPS57190118U (en) * | 1981-05-27 | 1982-12-02 | ||
| DE3904718A1 (en) | 1989-02-16 | 1990-08-30 | Renk Ag | Floating twisting lip seal |
| JPH0429607A (en) * | 1990-05-23 | 1992-01-31 | Nippon Steel Corp | High-tension bolt excellent in delay breakage resistance characteristic |
| JP2553566Y2 (en) * | 1991-01-31 | 1997-11-05 | 岡部株式会社 | Full thread lock bolt fittings |
| JPH0578184U (en) * | 1992-03-26 | 1993-10-22 | 株式会社三協精機製作所 | Rotary drive |
| FR2692633B1 (en) * | 1992-06-17 | 1995-08-25 | Aerospatiale | HARDWARE IN COMPOSITE MATERIAL CONSISTING OF A CERAMIC MATRIX REINFORCED WITH REFRACTORY FIBERS. |
| JPH0650235A (en) * | 1992-07-30 | 1994-02-22 | Hitachi Ltd | Electromagnetic fuel injection valve |
| DE4332368A1 (en) * | 1993-09-23 | 1995-03-30 | Bosch Gmbh Robert | Electromagnetically actuated valve, in particular for slip-controlled hydraulic brake systems in motor vehicles |
| DE4342415C2 (en) * | 1993-12-13 | 1998-04-16 | Haerle Anton | Tension-optimized thread profile |
| DE4421429A1 (en) * | 1994-06-18 | 1995-12-21 | Bosch Gmbh Robert | Electromagnetically actuated fuel injector |
| DE4427905A1 (en) * | 1994-08-06 | 1996-02-08 | Teves Gmbh Alfred | Valve device, in particular for hydraulic brake systems with blocking and / or traction control |
| DE4438878A1 (en) * | 1994-10-31 | 1996-05-02 | Leybold Ag | Sealing system for a vertically arranged shaft |
| JP3122345B2 (en) * | 1995-09-06 | 2001-01-09 | 日機装株式会社 | Gear type reducer |
| JP3023469U (en) * | 1995-10-04 | 1996-04-16 | ナミテイ株式会社 | Nut and fastening device using the same |
| JPH10159675A (en) | 1996-11-28 | 1998-06-16 | Toyota Motor Corp | Seal ring |
| JPH1150994A (en) * | 1997-07-31 | 1999-02-23 | Tochigi Fuji Ind Co Ltd | Centrifugal fluid machinery |
| DE19739150A1 (en) | 1997-09-06 | 1999-03-11 | Bosch Gmbh Robert | Fuel injector |
| DE19808068A1 (en) | 1998-02-26 | 1999-09-02 | Bosch Gmbh Robert | Fuel injector |
| WO1999066196A1 (en) * | 1998-06-18 | 1999-12-23 | Robert Bosch Gmbh | Fuel injector |
| DE19849210A1 (en) | 1998-10-26 | 2000-04-27 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engine fuel injection system has armature movable between two stops, damping spring arranged between second stop and armature |
-
2001
- 2001-07-09 DE DE10133263A patent/DE10133263A1/en not_active Withdrawn
-
2002
- 2002-05-07 JP JP2003512552A patent/JP2004521270A/en active Pending
- 2002-05-07 US US10/363,837 patent/US7048253B2/en not_active Expired - Fee Related
- 2002-05-07 WO PCT/DE2002/001634 patent/WO2003006819A1/en active IP Right Grant
- 2002-05-07 KR KR1020037003313A patent/KR100853643B1/en not_active IP Right Cessation
- 2002-05-07 EP EP02742713A patent/EP1407135B1/en not_active Expired - Lifetime
- 2002-05-07 DE DE50207511T patent/DE50207511D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE10133263A1 (en) | 2003-02-06 |
| US7048253B2 (en) | 2006-05-23 |
| US20040026646A1 (en) | 2004-02-12 |
| KR100853643B1 (en) | 2008-08-25 |
| KR20030036755A (en) | 2003-05-09 |
| EP1407135A1 (en) | 2004-04-14 |
| DE50207511D1 (en) | 2006-08-24 |
| WO2003006819A1 (en) | 2003-01-23 |
| JP2004521270A (en) | 2004-07-15 |
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