EP0514394B1 - Electromagnetically operated valve - Google Patents
Electromagnetically operated valve Download PDFInfo
- Publication number
- EP0514394B1 EP0514394B1 EP91902234A EP91902234A EP0514394B1 EP 0514394 B1 EP0514394 B1 EP 0514394B1 EP 91902234 A EP91902234 A EP 91902234A EP 91902234 A EP91902234 A EP 91902234A EP 0514394 B1 EP0514394 B1 EP 0514394B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- welded
- welding
- cross
- valve seat
- 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
- 238000003466 welding Methods 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 19
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
Definitions
- the invention is based on an electromagnetically actuated valve according to the preamble of patent claim 1.
- an electromagnetically actuated valve has already been proposed in which soldering or welding of the armature to the connecting tube, the guide element to the Core and with the connecting part, the intermediate part with the core end and with the connecting part and the connecting part with the valve seat body.
- the valve manufactured accordingly has a large construction volume due to the space required for the soldered or welded seams. When welding, there is a risk that the parts to be welded together deform due to thermal stresses, but also that the required reliability of the connection is not guaranteed with larger wall thicknesses of the projecting parts.
- the valve according to the invention with the characterizing features of claim 1 has the advantage that a reliable welding is achievable and the valve can be manufactured with smaller dimensions in the radial and axial directions.
- the simplified welding in a reduction in cross-section enables the heating of the parts to be welded to be reduced and at the same time forms a safe and reliable connection. Deformation of the parts due to the effects of temperature is therefore largely excluded.
- valve seat body has a circumferential groove between the valve seat and a weld seam connecting the valve seat body to the connecting part, since this reduction in cross-sectional area reduces the heat flow during welding from the weld seam into the valve seat of the valve seat body, so that the valve seat is distorted by thermal stresses is prevented.
- the cross-sectional area of the valve seat body between a processing bore of the valve seat body and a groove base of the circumferential groove is less than a quarter of the cross-sectional area of the valve seat body, which is formed between the line of contact of the valve closing body abutting the valve seat surface and the circumference of the valve seat body by reduce the heat flow as much as possible without endangering the stability of the valve seat body.
- the wall thickness of the reduction in cross-section of the part to be welded is significantly less than the wall thickness of the other part to be welded in the area of the weld, so that the significantly larger wall thickness of the other part ensures reliable welding and the necessary heat dissipation .
- FIG. 1 shows an exemplary embodiment of a valve designed according to the invention
- FIG. 2 shows the welding according to the invention of two metal parts of the valve projecting one above the other.
- the electromagnetically actuated valve in the form of an injection valve for fuel injection systems of internal combustion engines, for example shown in FIG. 1, has a core 1 surrounded by a magnetic coil 3, which is tubular and through which the fuel is supplied. Subsequent to a lower core end 2, on which the magnet coil 3 is arranged, a first connecting section 5 of a tubular, metallic intermediate part 6, which has a core cross section 2 and has a cross-sectional reduction 40 on the circumference, is concentric with a core longitudinal axis 4, tight with the core 1 a weld seam 54 running in the cross-sectional reduction 40 and produced by means of a laser is connected.
- the welding according to the invention shown in FIG. 2 of two projecting metal parts of the valve is intended to apply to all weldings of the valve in a correspondingly adapted form and shows, by way of example, the cross-sectional reduction 40 of the first connecting section 5 which is designed as a welding groove and which is close to one end of the part, for example of the intermediate part 6, and is delimited towards this end by a reinforcing collar 41 which extends radially beyond the base of the groove.
- the reinforcing collar 41 serves as protection for the weld seam 54 and the small wall thickness of the cross-sectional reduction 40 of approximately 0.3 mm. If the reinforcing collar 41 has an insertion phase 42 and / or an edge break toward the central opening 55 of the intermediate part 6, this facilitates assembly.
- the wall thickness of the other to be welded which is substantially greater than the reduction in cross section 40 Part, here the core end 2, enables safe and reliable welding.
- the first connecting section 5 encompasses a holding shoulder 36 of the core end 2, which has a smaller outer diameter than the core 1
- the second connecting section 7 encompasses a holding shoulder 37 of the connecting part which is also formed with a smaller outer diameter than in the adjacent area 20th
- a valve seat body 8 having a groove 31 is welded into a holding bore 39, the laser-generated weld running in a reduction in cross section 52 of the connecting part 20, as shown in FIG. 2 as an example.
- the groove 31 lies between the valve seat 9 and the reduction in cross section 52.
- the lining up of the core 1, the intermediate part 6, the connecting part 20 and the valve seat body 8 thus represents a tight, rigid metal unit. Downstream of the valve seat 9, at least one spray opening 17 is formed in the valve seat body 8.
- a sliding sleeve 22 pressed into a flow bore 21 of the core 1 serves to adjust the spring preload of a return spring 18 resting against the sliding sleeve 22, which is supported with its downstream end on a connecting tube 23.
- an armature 12 is connected by laser welding, in which the A cross-section reduction 51, which is designed to face away from the core end 2, runs a weld seam corresponding to that shown in FIG.
- the tubular intermediate part 6, together with a guide collar 10, also serves as a guide for the armature 12.
- this is connected to a valve closing body 14 which interacts with the valve seat 9, for example in the form of a ball, for example by welding.
- the circumferential groove 31 in the valve seat body 8 causes the cross-sectional area of the valve seat body 8 between a treatment bore 32 of the valve seat body 8 and a groove bottom 33 of the circumferential groove 31 to be less than a quarter of the cross-sectional area of the valve seat body 8, which lies between the line of contact of the valve seat surface Valve closing body 14 and the circumference of the valve seat body 8 is formed.
- This reduced cross-sectional area reduces the heat flow during welding from the weld seam 30 into the valve seat 9, so that warping of the valve seat 9 due to thermally induced stresses is excluded.
- the magnet coil 3 is completely surrounded in the axial direction and at least partially in the circumferential direction by at least one guide element 28, which is designed as a bracket in the exemplary embodiment and serves as a ferromagnetic element.
- the area 29 of the guide element 28 is adapted to the contour of the magnetic coil 3, an upper end section 44 which extends radially inwards partially surrounds the core 1, a lower end section 45 partially surrounds the connecting part 20.
- the upper end section 44 is the valve closing body 14 End facing away from the core 1 connected by laser welding, the welding being formed in a simple cross-sectional reduction 46 of the upper end section 44, which only extends over part of the circumference of the guide element 28.
- the guide element 28 With its lower end section 45, the guide element 28 is connected to the connecting part 20 in a cross-sectional reduction 47 by means of laser welding, for example in accordance with the weld shown in FIG. 2. Since the guide element 28 does not perform a sealing function, a circumferential, tight welding is not necessary, so that the cross-sectional reductions 46, 47 at the upper end section 44 and the lower end section 45 do not have to be circumferential.
- a plastic sheathing 24 which also encloses at least the intermediate part 6 and part of the connecting part 20.
- the color coding of the valve enables quick identification of the valve type during production, assembly or also when storing spare parts.
- an electrical connector 26 is molded onto the plastic sheathing 24, via which the electrical contacting of the magnetic coil 3 and thus its excitation takes place.
- the laser weldings according to the invention which are carried out in cross-sectional reductions, not only enable a compact structure of the valve, they are also distinguished by a high level of safety and reliability and simple execution.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Fuel-Injection Apparatus (AREA)
- Fluid-Driven Valves (AREA)
- Valve Housings (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Die Erfindung geht aus von einem elektromagnetisch betätigbaren Ventil nach der Gattung des Patentanspruchs 1. In der DE-A- 38 25 135 ist bereits ein elektromagnetisch betätigbares Ventil vorgeschlagen worden, bei dem ein Verlöten oder Verschweißen des Ankers mit dem Verbindungsrohr, des Leitelementes mit dem Kern sowie mit dem Verbindungsteil, des Zwischenteiles mit dem Kernende sowie mit dem Verbindungsteil und des Verbindungsteils mit dem Ventilsitzkörper erfolgt. Das dementsprechend gefertigte Ventil besitzt aufgrund des für die Löt- bzw. Schweißnähte vorzusehenden Platzbedarfes ein großes Bauvolumen. Beim Schweißen besteht die Gefahr, daß sich die miteinander zu verschweißenden Teile aufgrund von thermisch bedingten Spannungen verformen, aber auch, daß bei größeren Wandstärken der übereinanderragenden Teile die erforderliche Zuverlässigkeit der Verbindung nicht gewährleistet ist.The invention is based on an electromagnetically actuated valve according to the preamble of patent claim 1. In DE-A-38 25 135, an electromagnetically actuated valve has already been proposed in which soldering or welding of the armature to the connecting tube, the guide element to the Core and with the connecting part, the intermediate part with the core end and with the connecting part and the connecting part with the valve seat body. The valve manufactured accordingly has a large construction volume due to the space required for the soldered or welded seams. When welding, there is a risk that the parts to be welded together deform due to thermal stresses, but also that the required reliability of the connection is not guaranteed with larger wall thicknesses of the projecting parts.
Aus der EP-A-0 208 564 ist es bereits bekannt, die Verschweißung von zwei übereinanderragenden metallenen Blechen in einer Querschnittsverringerung eines der Bleche vorzusehen, um eine zuverlässige Verbindung zu erzielen.From EP-A-0 208 564 it is already known to provide for the welding of two overlapping metal sheets in a reduction in the cross section of one of the sheets in order to achieve a reliable connection.
Das erfindungsgemäße Ventil mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vorteil, daß eine sichere Verschweißung erzielbar ist und sich das Ventil mit in radialer und axialer Richtung kleineren Abmessungen fertigen läßt. Die vereinfachte Verschweißung in einer Querschnittsverringerung ermöglicht eine Verringerung der Erwärmung der zu verschweißenden Teile und bildet zugleich eine sichere und zuverlässige Verbindung aus. Eine Verformung der Teile infolge der Temperatureinwirkung ist somit weitgehend ausgeschlossen.The valve according to the invention with the characterizing features of claim 1 has the advantage that a reliable welding is achievable and the valve can be manufactured with smaller dimensions in the radial and axial directions. The simplified welding in a reduction in cross-section enables the heating of the parts to be welded to be reduced and at the same time forms a safe and reliable connection. Deformation of the parts due to the effects of temperature is therefore largely excluded.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Patentanspruch 1 angegebenen Ventils möglich.The measures listed in the subclaims allow advantageous developments and improvements of the valve specified in claim 1.
Vorteilhaft ist es, daß der Ventilsitzkörper zwischen dem Ventilsitz und einer den Ventilsitzkörper mit dem Verbindungsteil verbindenden Schweißnaht eine umlaufende Nut aufweist, da diese Reduzierung der Querschnittsfläche den Wärmefluß beim Schweißen von der Schweißnaht in den Ventilsitz des Ventilsitzkörpers verringert, so daß ein Verziehen des Ventilsitzes durch thermisch bedingte Spannungen verhindert wird.It is advantageous that the valve seat body has a circumferential groove between the valve seat and a weld seam connecting the valve seat body to the connecting part, since this reduction in cross-sectional area reduces the heat flow during welding from the weld seam into the valve seat of the valve seat body, so that the valve seat is distorted by thermal stresses is prevented.
Dabei ist es vorteilhaft, wenn die Querschnittsfläche des Ventilsitzkörpers zwischen einer Aufbereitungsbohrung des Ventilsitzkörpers und einem Nutgrund der umlaufenden Nut Weniger als ein Viertel der Querschnittsfläche des Ventilsitzkörpers beträgt, die zwischen der Berührungslinie des an der Ventilsitzfläche anliegenden Ventilschließkörpers und dem Umfang des Ventilsitzkörpers gebildet wird, um den Wärmefluß so weit wie möglich zu verringern, ohne aber die Stabilität des Ventilsitzkörpers zu gefährden.It is advantageous if the cross-sectional area of the valve seat body between a processing bore of the valve seat body and a groove base of the circumferential groove is less than a quarter of the cross-sectional area of the valve seat body, which is formed between the line of contact of the valve closing body abutting the valve seat surface and the circumference of the valve seat body by reduce the heat flow as much as possible without endangering the stability of the valve seat body.
Vorteilhaft ist es auch, wenn die Wandstärke der Querschnittsverringerung des einen zu verschweißenden Teiles wesentlich geringer ist als die Wandstärke des anderen zu verschweißenden Teiles in Bereich der Verschweißung, so daß durch die deutlich größere Wandstärke des anderen Teiles eine sichere Verschweißung sowie die erforderliche Wärmeabfuhr gewährleistet ist.It is also advantageous if the wall thickness of the reduction in cross-section of the part to be welded is significantly less than the wall thickness of the other part to be welded in the area of the weld, so that the significantly larger wall thickness of the other part ensures reliable welding and the necessary heat dissipation .
Besonders vorteilhaft ist es, ein hohles, aus Kunststoff gefertigtes Kennzeichnungselement, das das Ventil umgreift und an diesem gehalten wird, vorzusehen. Die farbige Ausbildung der Kennzeichnungselemente von Ventilen erlaubt eine schnelle Identifikation des Ventiltyps bei der Produktion, Montage oder auch bei der Ersatzteilhaltung.It is particularly advantageous to provide a hollow identification element made of plastic which encompasses and is held on the valve. The colored design of the label elements of valves enables quick identification of the valve type during production, assembly or also when storing spare parts.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Ventils und Figur 2 die erfindungsgemäße Verschweißung von zwei übereinanderragenden metallenen Teilen des Ventils.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. FIG. 1 shows an exemplary embodiment of a valve designed according to the invention and FIG. 2 shows the welding according to the invention of two metal parts of the valve projecting one above the other.
Das in der Figur 1 beispielsweise dargestellte elektromagnetisch betätigbare Ventil in Form eines Einspritzventils für Brennstoffeinspritzanlagen von Brennkraftmaschinen hat einen von einer Magnetspule 3 umgebenen Kern 1, der rohrförmig ausgebildet ist und über den der Brennstoffzulauf erfolgt. Anschließend an ein unteres Kernende 2, auf dem die Magnetspule 3 angeordnet ist, ist konzentrisch zu einer Ventillängsachse 4 dicht mit dem Kern 1 ein das Kernende 2 umfassender erster Verbindungsabschnitt 5 eines rohrförmigen, metallenen Zwischenteiles 6, der am Umfang eine Querschnittsverringerung 40 aufweist, durch eine in der Querschnittsverringerung 40 verlaufende, mittels Laser erzeugte Schweißnaht 54 verbunden.The electromagnetically actuated valve in the form of an injection valve for fuel injection systems of internal combustion engines, for example shown in FIG. 1, has a core 1 surrounded by a
Die in der Figur 2 dargestellte erfindungsgemäße Verschweißung von zwei übereinanderragenden metallenen Teilen des Ventils soll für alle Verschweißungen des Ventils in entsprechend angepaßter Form gelten und zeigt beispielhaft die als Schweißnut ausgebildete Querschnittsverringerung 40 des ersten Verbindungsabschnitts 5, die in der Nähe eines Endes des Teiles, beispielsweise des Zwischenteiles 6, liegt und zu diesem Ende hin durch einen radial sich über den Nutgrund hinaus erstreckenden Verstärkungsbund 41 begrenzt wird. Der Verstärkungsbund 41 dient als Schutz für die Schweißnaht 54 und die geringe Wandstärke der Querschnittsverringerung 40 von ca. 0,3 mm. Weist der Verstärkungsbund 41 zur zentralen Öffnung 55 des Zwischenteils 6 hin eine Einführphase 42 und/oder einen Kantenbruch auf, so erleichtert dies die Montage. Die im Vergleich zur Querschnittsverringerung 40 wesentlich größere Wandstärke des anderen zu verschweißenden Teiles, hier des Kernendes 2, ermöglicht eine sichere und zuverlässige Verschweißung.The welding according to the invention shown in FIG. 2 of two projecting metal parts of the valve is intended to apply to all weldings of the valve in a correspondingly adapted form and shows, by way of example, the
Ein einen größeren Durchmesser als der erste Verbindungsabschnitt 5 aufweisender zweiter Verbindungsabschnitt 7 des Zwischenteiles 6 umgreift ein rohrförmiges metallenes Verbindungsteil und ist mit diesem mittels einer in einer am stromabwärtigen Ende des zweiten Verbindungsabschnittes 7 ausgebildeten Querschnittsverringerung 50 ausgeführten Laserschweißung entsprechend der Darstellung in Figur 2 verbunden. Um kleine Außenmaße des Ventils zu ermöglichen, umgreift der erste Verbindungsabschnitt 5 einen Halteabsatz 36 des Kernendes 2, der einen geringeren Außendurchmesser als der Kern 1 hat, und der zweite Verbindungsabschnitt 7 umgreift einen ebenfalls mit geringerem Außendurchmesser als im angrenzenden Bereich ausgebildeten Halteabsatz 37 des Verbindungsteils 20.A second connecting section 7 of the
An dem dem Kern 1 abgewandten Ende des Verbindungsteiles 20 ist in eine Haltebohrung 39 ein eine Nut 31 aufweisender Ventilsitzkörper 8 eingeschweißt, wobei die mittels Laser erzeugte Schweißung in einer Querschnittsverringerung 52 des Verbindungsteiles 20 verläuft, wie Figur 2 dies als Beispiel zeigt. Die Nut 31 liegt dabei zwischen Ventilsitz 9 und Querschnittsverringerung 52. Die Aneinanderreihung von Kern 1, Zwischenteil 6, Verbindungsteil 20 und Ventilsitzkörper 8 stellt somit eine dichte starre metallene Einheit dar. Stromabwärts des Ventilsitzes 9 ist im Ventilsitzkörper 8 wenigstens eine Abspritzöffnung 17 ausgebildet.At the end of the connecting part 20 facing away from the core 1, a valve seat body 8 having a
Eine in eine Strömungsbohrung 21 des Kerns 1 eingepreßte Verschiebehülse 22 dient zur Einstellung der Federvorspannung einer an der Verschiebehülse 22 anliegenden Rückstellfeder 18, die sich mit ihrem stromabwärts gerichteten Ende an einem Verbindungsrohr 23 abstützt. Mit dem der Rückstellfeder 18 zugewandten Ende des Verbindungsrohres 23 ist durch Laserschweißung ein Anker 12 verbunden, in dessen dem Kernende 2 abgewandt ausgebildeter Querschnittsverringerung 51 eine Schweißnaht entsprechend der in der Figur 2 gezeigten verläuft. Das rohrförmige Zwischenteil 6 dient mit einem Führungsbund 10 zugleich als Führung für den Anker 12. Am anderen Ende des Verbindungsrohres 23 ist dieses mit einem mit dem Ventilsitz 9 zusammenwirkenden, z.B. als Kugel ausgebildeten Ventilschließkörper 14 beispielsweise durch Schweißen verbunden.A sliding sleeve 22 pressed into a flow bore 21 of the core 1 serves to adjust the spring preload of a
Die umlaufende Nut 31 im Ventilsitzkörper 8 bewirkt, daß die Querschnittsfläche des Ventilsitzkörpers 8 zwischen einer Aufbereitungsbohrung 32 des Ventilsitzkörpers 8 und einem Nutgrund 33 der umlaufenden Nut 31 weniger als ein Viertel der Querschnittsfläche des Ventilsitzkörpers 8 beträgt, die zwischen der Berührungslinie des an der Ventilsitzfläche anliegenden Ventilschließkörpers 14 und dem Umfang des Ventilsitzkörpers 8 gebildet wird. Diese verringerte Querschnittsfläche reduziert den Wärmefluß beim Schweißen von der Schweißnaht 30 in den Ventilsitz 9, so daß ein Verziehen des Ventilsitzes 9 durch thermisch bedingte Spannungen ausgeschlossen ist.The
Die Magnetspule 3 ist von wenigstens einem, im Ausführungsbeispiel als Bügel ausgebildeten, als ferromagnetisches Element dienenden Leitelement 28 in axialer Richtung vollständig und in Umfangsrichtung zumindest teilweise umgeben. Das Leitelement 28 ist mit seinem Bereich 29 an die Kontur der Magnetspule 3 angepaßt, ein sich radial nach innen erstreckender oberer Endabschnitt 44 umgreift teilweise den Kern 1, ein unterer Endabschnitt 45 teilweise das Verbindungsteil 20. Der obere Endabschnitt 44 ist mit seinem dem Ventilschließkörper 14 abgewandten Ende mit dem Kern 1 durch Laserschweißen verbunden, wobei die Schweißung in einer einfachen, nur über einen Teil des Umfanges des Leitelementes 28 verlaufenden Querschnittsverringerung 46 des oberen Endabschnittes 44 ausgebildet ist. Mit seinem unteren Endabschnitt 45 ist das Leitelement 28 mittels Laserschweißen mit dem Verbindungsteil 20 in einer Querschnittsverringerung 47 verbunden, beispielsweise entsprechend der in der Figur 2 dargestellten Schweißung. Da das Leitelement 28 keine Abdichtfunktion erfüllt, ist eine umlaufende, dichte Verschweißung nicht notwendig, so daß auch die Querschnittsverringerungen 46, 47 an dem oberen Endabschnitt 44 und dem unteren Endabschnitt 45 nicht umlaufend ausgebildet sein müssen. In einem weiteren, hier nicht dargestellten Ausführungsbeispiel ist es auch möglich, ebenso wie an dem oberen Endabschnitt 44 auch an dem unteren Endabschnitt 45 auf die Ausbildung einer über den gesamten Umfang des Leitelementes 28 verlaufenden Schweißnut zu verzichten und nur eine einfache, sich nur über einen Teil des Umfanges des Leitelementes 28 erstreckende Querschnittsverringerung vorzusehen.The
Mindestens ein Teil des Kerns 1 und die Magnetspule 3 in ihrer gesamten axialen Länge sind durch eine Kunststoffummantelung 24 umschlossen, die auch wenigstens noch das Zwischenteil 6 und einen Teil des Verbindungsteils 20 umschließt. An diese durch Ausgießen oder Umspritzen mit Kunststoff erzielte Kunststoffummantelung 24 schließt sich in axialer Richtung stromabwärts ein das Verbindungsteil 20 zum Teil umschließendes, aus farbigem Kunststoff gefertigtes rohrförmiges Kennzeichnungselement 27 an, das an dem Ventil durch eine Klemm-, Preß- oder Schraubverbindung gehalten wird. Die farbige Kennzeichnung des Ventils ermöglicht eine schnelle Identifikation des Ventiltyps bei der Produktion, Montage oder auch bei der Ersatzteilhaltung.At least a part of the core 1 and the
An die Kunststoffummantelung 24 ist zugleich ein elektrischer Anschlußstecker 26 angeformt, über den die elektrische Kontaktierung der Magnetspule 3 und damit deren Erregung erfolgt.At the same time, an
Die erfindungsgemäßen, in Querschnittsverringerungen ausgeführten Laserschweißungen ermöglichen nicht nur einen kompakten Aufbau des Ventils, sie zeichnen sich auch durch eine hohe Sicherheit und Zuverlässigkeit sowie eine einfache Ausführbarkeit aus.The laser weldings according to the invention, which are carried out in cross-sectional reductions, not only enable a compact structure of the valve, they are also distinguished by a high level of safety and reliability and simple execution.
Claims (4)
- Electromagnetically operable valve, in particular an injection valve for fuel injection systems of internal combustion engines, having a core (1) surrounded by a solenoid (3), having an armature (12) by means of which a valve closing member (14) which interacts with a fixed valve seat (9) can be operated by means of a connecting tube (23) welded to the armature (12), having at least one conductive element (28) which overlaps the solenoid (3) and is connected by welding to a connecting part (20) with its end which faces the valve closing member (14) and with its other end to the core (1), and having a metal valve seating member (8) which has the fixed valve seat (9) and is fixed by welding to the connecting part (20) at its end averted from the valve closing member (14), characterized in that the welding of two mutually overlapping metal parts of the valve is performed in a cross-sectional constriction (40, 46, 47, 50, 51, 52) of one of the two parts respectively to be welded, the valve seating member (8) having a circumferential groove (31) between the valve seat (9) and a welding seam (30) which connects the valve seating member (8) to the connecting part (20).
- Valve according to Claim 1, characterized in that the cross-sectional area of the valve seating member (8) between a preparation bore (32) of the valve seating member (8) and a groove bottom (33) of the circumferential groove (31) amounts to less than a quarter of the cross-sectional area of the valve seating member (8), which is formed between the line of contact of the valve closing member (14), which bears against the valve seat surface, and the circumference of the valve seating member (8).
- Valve according to Claim 1, characterized in that the wall thickness of the cross-sectional constriction (40, 46, 47, 50, 51, 52) of one of the parts to be welded is substantially smaller than the wall thickness of the other part to be welded in the region of the weld.
- Valve according to Claim 1, characterized in that a hollow marking element (27) produced from plastic surrounds the valve and is held on the latter.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4003227 | 1990-02-03 | ||
| DE4003227A DE4003227C1 (en) | 1990-02-03 | 1990-02-03 | EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part |
| PCT/DE1991/000043 WO1991011604A2 (en) | 1990-02-03 | 1991-01-19 | Electromagnetically operated valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0514394A1 EP0514394A1 (en) | 1992-11-25 |
| EP0514394B1 true EP0514394B1 (en) | 1994-08-24 |
Family
ID=6399368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91902234A Expired - Lifetime EP0514394B1 (en) | 1990-02-03 | 1991-01-19 | Electromagnetically operated valve |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5236174A (en) |
| EP (1) | EP0514394B1 (en) |
| JP (1) | JP3037412B2 (en) |
| KR (1) | KR0185732B1 (en) |
| AT (1) | ATE110442T1 (en) |
| BR (1) | BR9105981A (en) |
| DE (2) | DE4003227C1 (en) |
| ES (1) | ES2060359T3 (en) |
| RU (1) | RU2076940C1 (en) |
| WO (1) | WO1991011604A2 (en) |
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| DE4125155C1 (en) * | 1991-07-30 | 1993-02-04 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
| DE4131500A1 (en) * | 1991-09-21 | 1993-03-25 | Bosch Gmbh Robert | ELECTROMAGNETICALLY OPERATED INJECTION VALVE |
| JP3085008B2 (en) * | 1993-03-12 | 2000-09-04 | 株式会社デンソー | Fluid injection valve |
| DE4310819A1 (en) * | 1993-04-02 | 1994-10-06 | Bosch Gmbh Robert | Procedure for adjusting a valve |
| US5494225A (en) * | 1994-08-18 | 1996-02-27 | Siemens Automotive Corporation | Shell component to protect injector from corrosion |
| US5494223A (en) * | 1994-08-18 | 1996-02-27 | Siemens Automotive L.P. | Fuel injector having improved parallelism of impacting armature surface to impacted stop surface |
| DE4429804A1 (en) * | 1994-08-23 | 1996-02-29 | Johnson Service Co | Process for the production of series valves used in heating, ventilation and air conditioning |
| JPH08189439A (en) * | 1994-12-28 | 1996-07-23 | Zexel Corp | Solenoid type fuel injection valve and its nozzle assembly fitting method |
| DE19503821A1 (en) * | 1995-02-06 | 1996-08-08 | Bosch Gmbh Robert | Electromagnetically actuated valve |
| DE19503820C2 (en) * | 1995-02-06 | 2003-10-16 | Bosch Gmbh Robert | Electromagnetically actuated valve and method for producing a guide on a valve |
| DE19739324A1 (en) * | 1997-09-09 | 1999-03-11 | Bosch Gmbh Robert | Electromagnetically actuated valve |
| JP3941269B2 (en) * | 1997-12-11 | 2007-07-04 | 株式会社デンソー | Laser welding structure and method of metal member, and fuel injection valve |
| US6047907A (en) | 1997-12-23 | 2000-04-11 | Siemens Automotive Corporation | Ball valve fuel injector |
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| US6536681B2 (en) | 2000-12-29 | 2003-03-25 | Siemens Automotive Corporation | Modular fuel injector having a surface treatment on an impact surface of an electromagnetic actuator and having an integral filter and O-ring retainer assembly |
| US6655609B2 (en) | 2000-12-29 | 2003-12-02 | Siemens Automotive Corporation | Modular fuel injector having a low mass, high efficiency electromagnetic actuator and having an integral filter and o-ring retainer assembly |
| US6523760B2 (en) | 2000-12-29 | 2003-02-25 | Siemens Automotive Corporation | Modular fuel injector having interchangeable armature assemblies and having a terminal connector interconnecting an electromagnetic actuator with an electrical terminal |
| US6568609B2 (en) | 2000-12-29 | 2003-05-27 | Siemens Automotive Corporation | Modular fuel injector having an integral or interchangeable inlet tube and having an integral filter and o-ring retainer assembly |
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| US6508417B2 (en) | 2000-12-29 | 2003-01-21 | Siemens Automotive Corporation | Modular fuel injector having a snap-on orifice disk retainer and having a lift set sleeve |
| US6708906B2 (en) * | 2000-12-29 | 2004-03-23 | Siemens Automotive Corporation | Modular fuel injector having a surface treatment on an impact surface of an electromagnetic actuator and having an integral filter and dynamic adjustment assembly |
| US6547154B2 (en) | 2000-12-29 | 2003-04-15 | Siemens Automotive Corporation | Modular fuel injector having a terminal connector interconnecting an electromagnetic actuator with a pre-bent electrical terminal |
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| US6811091B2 (en) | 2000-12-29 | 2004-11-02 | Siemens Automotive Corporation | Modular fuel injector having an integral filter and dynamic adjustment assembly |
| US6499668B2 (en) | 2000-12-29 | 2002-12-31 | Siemens Automotive Corporation | Modular fuel injector having a surface treatment on an impact surface of an electromagnetic actuator and having a terminal connector interconnecting an electromagnetic actuator with an electrical terminal |
| US6607143B2 (en) | 2000-12-29 | 2003-08-19 | Siemens Automotive Corporation | Modular fuel injector having a surface treatment on an impact surface of an electromagnetic actuator and having a lift set sleeve |
| US6523756B2 (en) | 2000-12-29 | 2003-02-25 | Siemens Automotive Corporation | Modular fuel injector having a low mass, high efficiency electromagnetic actuator and having a lift set sleeve |
| US6502770B2 (en) | 2000-12-29 | 2003-01-07 | Siemens Automotive Corporation | Modular fuel injector having a snap-on orifice disk retainer and having a terminal connector interconnecting an electromagnetic actuator with an electrical terminal |
| US6769636B2 (en) | 2000-12-29 | 2004-08-03 | Siemens Automotive Corporation | Modular fuel injector having interchangeable armature assemblies and having an integral filter and O-ring retainer assembly |
| US6523761B2 (en) | 2000-12-29 | 2003-02-25 | Siemens Automotive Corporation | Modular fuel injector having an integral or interchangeable inlet tube and having a lift set sleeve |
| JP3799599B2 (en) * | 2001-02-26 | 2006-07-19 | 株式会社デンソー | Welding apparatus and welding method |
| US6904668B2 (en) | 2001-03-30 | 2005-06-14 | Siemens Vdo Automotive Corp. | Method of manufacturing a modular fuel injector |
| US7093362B2 (en) | 2001-03-30 | 2006-08-22 | Siemens Vdo Automotive Corporation | Method of connecting components of a modular fuel injector |
| US6676043B2 (en) | 2001-03-30 | 2004-01-13 | Siemens Automotive Corporation | Methods of setting armature lift in a modular fuel injector |
| US6687997B2 (en) | 2001-03-30 | 2004-02-10 | Siemens Automotive Corporation | Method of fabricating and testing a modular fuel injector |
| JP2002303222A (en) * | 2001-04-02 | 2002-10-18 | Denso Corp | Fuel injection valve |
| DE10332348A1 (en) * | 2003-07-16 | 2005-02-03 | Robert Bosch Gmbh | Fuel injector |
| JP3819906B2 (en) * | 2004-02-27 | 2006-09-13 | 株式会社ケーヒン | Electromagnetic fuel injection valve and manufacturing method thereof |
| DE102004037541B4 (en) | 2004-08-03 | 2016-12-29 | Robert Bosch Gmbh | Fuel injector |
| JP3955055B2 (en) * | 2004-09-27 | 2007-08-08 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| JP3993594B2 (en) * | 2004-09-27 | 2007-10-17 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
| US7703709B2 (en) * | 2004-09-27 | 2010-04-27 | Keihin Corporation | Electromagnetic fuel injection valve |
| DE102005037319A1 (en) * | 2005-08-04 | 2007-02-08 | Robert Bosch Gmbh | Fuel injector |
| DE102005052255B4 (en) | 2005-11-02 | 2020-12-17 | Robert Bosch Gmbh | Fuel injector |
| JP4789660B2 (en) * | 2006-03-15 | 2011-10-12 | パナソニック株式会社 | Motor driving apparatus and motor driving method |
| DE102008000797B4 (en) * | 2007-03-26 | 2014-05-22 | Denso Corporation | Solenoid valve and fuel injector with the same |
| EP2916054A2 (en) * | 2007-03-28 | 2015-09-09 | Fillon Technologies | Dispensing valve |
| DE102007049945A1 (en) * | 2007-10-18 | 2009-04-23 | Robert Bosch Gmbh | Fuel injector |
| DE102013223530A1 (en) | 2013-11-19 | 2015-05-21 | Robert Bosch Gmbh | Valve for metering fluid |
| ITBO20150236A1 (en) * | 2015-05-05 | 2016-11-05 | Magneti Marelli Spa | ELECTROMAGNETIC FUEL INJECTOR WITH RING THROAT ARRANGED IN CORRESPONDENCE WITH THE WELDING OF AN EXTENSION CABLE |
| WO2022251503A1 (en) | 2021-05-28 | 2022-12-01 | Stanadyne Llc | Fuel injector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583317B1 (en) * | 1985-06-12 | 1987-09-11 | Carnaud Emballage Sa | METHOD FOR MANUFACTURING A CYLINDRICAL PACKAGE BY WELDING USING A LASER BEAM AND APPARATUS FOR CARRYING OUT SUCH A METHOD. |
| DE3825134A1 (en) * | 1988-07-23 | 1990-01-25 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTUABLE VALVE AND METHOD FOR THE PRODUCTION THEREOF |
| DE3825135A1 (en) * | 1988-07-23 | 1990-01-25 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTUABLE VALVE |
| DE3831196A1 (en) * | 1988-09-14 | 1990-03-22 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTUABLE VALVE |
| DE3927932A1 (en) * | 1989-08-24 | 1991-02-28 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE |
-
1990
- 1990-02-03 DE DE4003227A patent/DE4003227C1/en not_active Expired - Lifetime
-
1991
- 1991-01-19 BR BR919105981A patent/BR9105981A/en not_active IP Right Cessation
- 1991-01-19 WO PCT/DE1991/000043 patent/WO1991011604A2/en active IP Right Grant
- 1991-01-19 JP JP03502371A patent/JP3037412B2/en not_active Expired - Lifetime
- 1991-01-19 DE DE59102644T patent/DE59102644D1/en not_active Expired - Lifetime
- 1991-01-19 KR KR1019920701828A patent/KR0185732B1/en not_active IP Right Cessation
- 1991-01-19 EP EP91902234A patent/EP0514394B1/en not_active Expired - Lifetime
- 1991-01-19 RU SU915052671A patent/RU2076940C1/en not_active IP Right Cessation
- 1991-01-19 AT AT91902234T patent/ATE110442T1/en not_active IP Right Cessation
- 1991-01-19 ES ES91902234T patent/ES2060359T3/en not_active Expired - Lifetime
- 1991-01-19 US US07/915,989 patent/US5236174A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4003227C1 (en) | 1991-01-03 |
| JP3037412B2 (en) | 2000-04-24 |
| WO1991011604A2 (en) | 1991-08-08 |
| KR0185732B1 (en) | 1999-03-20 |
| EP0514394A1 (en) | 1992-11-25 |
| RU2076940C1 (en) | 1997-04-10 |
| KR920704001A (en) | 1992-12-18 |
| ES2060359T3 (en) | 1994-11-16 |
| DE59102644D1 (en) | 1994-09-29 |
| JPH05504181A (en) | 1993-07-01 |
| WO1991011604A3 (en) | 1991-09-19 |
| ATE110442T1 (en) | 1994-09-15 |
| BR9105981A (en) | 1992-11-10 |
| US5236174A (en) | 1993-08-17 |
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