EP2126332B1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- EP2126332B1 EP2126332B1 EP08708598A EP08708598A EP2126332B1 EP 2126332 B1 EP2126332 B1 EP 2126332B1 EP 08708598 A EP08708598 A EP 08708598A EP 08708598 A EP08708598 A EP 08708598A EP 2126332 B1 EP2126332 B1 EP 2126332B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- fit
- region
- fuel injection
- component
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
Definitions
- the invention relates to a fuel injection valve according to the preamble of the main claim.
- a fuel injection valve which comprises an electromagnetic actuator with a magnetic coil, with an inner pole and with an outer magnetic circuit component and a movable valve closing body, which cooperates with a valve seat body associated valve seat.
- the valve seat body and the inner pole are arranged in an inner opening of a thin-walled valve sleeve and the magnet coil and the outer magnetic circuit component on the outer circumference of the valve sleeve.
- the magnetic circuit component formed in the form of a magnet pot is first pushed onto the valve sleeve, then the valve seat body pressed into the inner opening of the valve sleeve, so that solely by pressing in the valve seat body, a firm connection of the valve sleeve and magnetic circuit component is achieved.
- the inner pole is subsequently fixed by pressing in the valve sleeve.
- a fuel injection valve for fuel injection systems of internal combustion engines which has a valve longitudinal axis, an excitable actuator for actuating a valve closing body, which cooperates with a provided on a valve seat body valve seat surface, and at least one ejection opening.
- the fuel injection valve has a plurality of metallic components, wherein in particular an inner serving as a core inner pole and an outer tubular housing member are firmly connected to each other by pressing.
- two unstructured surfaces of these components corresponding to one another form the pressing partners.
- this pressing region is followed by a recessed area, which arises due to the defined fixed length of the pressing region and which then turns into a radially larger caulking.
- the inner pole In the caulking area, the inner pole has a knurled surface at its upstream end.
- the caulking or crimping in the Verstemm Scheme carried out by means of a caulking, so that in this area a firm connection of the inner pole and outer housing component can be generated.
- a fuel injection valve which is equipped with an excitable actuator for actuating a valve closing body, which cooperates with a provided on a valve seat body valve seat surface, and with at least one injection orifice, and with metallic components which are fixedly connected by pressing together.
- connection region of a core serving as an inner pole and a valve sleeve is formed such that, starting from the pressing region of the core only a recessed area and then following a radially outwardly protruding pressing lip on the outer contour of this core, the press lip so with the opposite Valve sleeve corresponds that between the pressing region and the pressing lip, a cavity is formed by the recessed area in which the dirt generated during the pressing can be retained.
- the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that it is inexpensive to produce in a particularly simple manner.
- Metallic components of the fuel injection valve characterized in that the sliding of the joining partners during the press-fitting process, the possibly resulting abrasion is reliably and reliably retained and chambered in a resulting from a recessed area and a pressing lip on the outer contour of a joining partner cavity. In this way, a rinse or other expensive cleaning can be omitted.
- the chambered cavity in the recessed area abrasion is securely stored and thus can not get into other areas of the fuel injector and there lead to functional impairment.
- press connections between metallic component partners can be produced, which hold securely and reliably over a long period of time while avoiding cold welding and tight.
- the press connections are very simple and inexpensive to manufacture, since advantageously known and usually necessary separate operations, such as coating or oiling for improved joining of the component partners or heating of the component partners can be dispensed with for shrinking.
- At least one of the component partners has a structure with grooves in its pressing area and / or the respective pressing area has an inlet rounding in at least one transition to an adjacent component section.
- the press length can be minimized from the outset.
- the pressing region of a first component partner is raised in relation to the adjacent sections of this component partner.
- inlet fillets are provided, which have a relatively large radius.
- the radii advantageously correspond to an angularity in the transitions of about 0.5 ° to 1.2 °.
- furrows or groove-like grooves are provided on the surface in addition to the inlet fillets 59 as an additional measure, are repeatedly interrupted by the zones of a possible cold welding. Adverse "feeding zones" of the press connection are largely avoided.
- the grooves e.g. run around, a high excess, because they are plastically deformed during pressing and leveling something.
- the generated profile of grooves must have such a strength that at a slight excess, the elongation of a second component partner is still effected.
- the component partners can not stretch or compress due to their rigidity or if they are too soft in their material, such as soft magnetic chromium steels, which are usually used for the most diverse components of an electromagnetically driven fuel injection valve, cold welds are very likely to occur in known compression joints ("Eater") during the joining process of the pressing, but which are avoided by the inventive measures, in particular on components made of soft magnetic chrome steel. It can be dispensed with elaborate accurate and costly processing methods, such as fine grinding or honing, with which the component tolerances could be narrowed and with considerable effort, the press connections could be improved.
- soft magnetic chromium steels which are usually used for the most diverse components of an electromagnetically driven fuel injection valve
- the metal components to be pressed are washed with a cleaner, at least in their respective pressing areas.
- advantageous lubricant reservoirs are produced in the respective pressing area.
- the anticorrosive universal cleaner SurTec® 104 or SurTec® 089 or Hitec® E536 from the company Ethyl Corp. Advantageously come as a cleaner. for use.
- FIG. 1 a fuel injection valve according to the prior art explained with its basic components.
- electromagnetically actuated valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines has a largely surrounded by a magnetic coil 1, serving as réellepol and partially as a fuel flow largely tubular core 2.
- the magnetic coil 1 is of an outer, sleeve-shaped and stepped running , z.
- the magnetic coil 1, the core 2 and the valve shell 5 together form an electrically excitable actuator.
- solenoid coil 1 While embedded in a bobbin 3 solenoid coil 1 surrounds a valve sleeve 6 from the outside, the core 2 in an inner, concentric with a valve longitudinal axis 10 extending opening 11 of the valve sleeve 6 is introduced.
- the e.g. Ferritic valve sleeve 6 is stretched long and thin-walled.
- the opening 11 also serves as a guide opening for a valve needle 14 which is axially movable along the valve longitudinal axis 10.
- the valve sleeve 6 extends in the axial direction, e.g. over more than half the total axial extent of the fuel injector.
- valve seat body 15 which is attached to the valve sleeve 6, e.g. is fastened by means of a weld 8.
- the valve seat body 15 has a fixed valve seat surface 16 as a valve seat.
- the valve needle 14 is formed for example by a tubular anchor portion 17, a likewise tubular needle portion 18 and a spherical valve-closing body 19, wherein the valve closing body 19, for example. is firmly connected to the needle portion 18 by means of a weld.
- a e.g. cup-shaped spray orifice plate 21 is arranged, the bent and circumferentially encircling retaining edge 20 is directed against the flow direction upwards.
- valve seat body 15 and spray disk 21 The solid connection of the valve seat body 15 and spray disk 21 is z. B. realized by a circumferential tight weld.
- armature portion 17 in an inner longitudinal bore 23 fuel passing outwards and on the valve closing body 19, for. can flow along flats 24 to the valve seat surface 16 along.
- the actuation of the injection valve takes place in a known manner electromagnetically.
- the electromagnetic circuit with the solenoid coil 1, the inner core 2, the outer valve shell 5 and the anchor portion 17 of the Anchor portion 17 is aligned with the valve closing body 19 facing away from the end of the core 2.
- the spherical valve closing body 19 cooperates with the valve seat surface 16 of the valve seat body 15, which tapers in the direction of the flow in the direction of flow and which is formed in the axial direction downstream of a guide opening in the valve seat body 15.
- the spray perforated disc 21 has at least one, for example, four ejection openings 27 formed by erosion, laser drilling or punching.
- the insertion depth of the core 2 in the injection valve is decisive for the stroke of the valve needle 14.
- the one end position of the valve needle 14 is fixed to the valve seat surface 16 of the valve seat body 15 when the solenoid valve 1 is not energized, while the other one End position of the valve needle 14 results in energized solenoid coil 1 by the system of the anchor portion 17 at the downstream end of the core.
- the stroke is adjusted by an axial displacement of the core 2, for example, produced by a machining process such as turning, which is subsequently connected firmly to the valve sleeve 6 according to the desired position.
- an adjustment in the form of an adjusting sleeve 29 is inserted.
- the adjusting sleeve 29 serves to adjust the spring bias of the voltage applied to the adjusting sleeve 29 return spring 25, which in turn is supported with its opposite side to the valve needle 14, wherein an adjustment of the dynamic Abspritzmenge with the adjusting sleeve 29.
- a fuel filter 32 is disposed above the adjusting sleeve 29 in the valve sleeve 6.
- the injector described so far is characterized by its particularly compact design, so that a very small, handy injection valve is created.
- These components form a preassembled independent assembly, which is called function part 30 below.
- the functional part 30 therefore essentially comprises the electromagnetic circuit 1, 2, 5 and a sealing valve (valve closing body 19, valve seat body 15) with a subsequent jet preparation element (spray perforated disk 21) and as the main body the valve sleeve 6.
- connection part 40 is above all things in that it comprises the electrical and the hydraulic connection of the fuel injection valve.
- the largely executed as a plastic part connector 40 therefore has a serving as a fuel inlet nozzle tubular body 42.
- a concentric to the valve longitudinal axis 10 extending flow bore 43 of an inner connecting pipe 44 in the base body 42 serves as a fuel inlet and is flowed through from the inflow end of the fuel injection valve in the axial direction of the fuel ,
- a hydraulic connection of connecting part 40 and functional part 30 is achieved in the fully assembled fuel injection valve in that the flow holes 43 and 28 of both modules are brought to each other so that an unimpeded flow through the fuel is ensured.
- a lower end 47 of the connecting tube 44 protrudes into the opening 11 of the valve sleeve 6 in order to increase the stability of the connection.
- the main body 42 made of plastic can be sprayed onto the functional part 30 so that the plastic immediately surrounds parts of the valve sleeve 6 and of the valve jacket 5.
- a secure seal between the functional part 30 and the main body 42 of the connecting part 40 is achieved, for example, via a labyrinth seal 46 on the circumference of the valve jacket 5.
- To the base body 42 includes a mitangespritzter electrical connector 56. At its opposite end of the connector 56, the contact elements with the solenoid coil 1 are electrically connected.
- FIGS. 2 to 8 metallic components of the fuel injection valve are shown, which are fixedly connected to at least one other metallic component by means of pressing.
- FIG. 2 a detailed view of a valve sleeve 6,
- FIG. 3 a detailed view of a connecting pipe 44
- FIG. 4 a detailed view of serving as an inner pole core 2
- FIG. 8 a detailed view of a valve shell 5 in the form of a magnet pot, wherein in the Figures 3 and 4 shown embodiments for better understanding the diere and are not included in the invention.
- press fits between the two components to be fastened are appropriate. But press fits generally lead in the components to compressions or strains plastic or elastic type, depending on the tolerance position, material and component geometry. If the component partners can not stretch or compress due to their rigidity or if they are too soft in their material, such as soft magnetic chromium steels as particularly suitable stainless steels, it is very likely that cold welds ("eaters") will occur during the joining process. Also note the installation conditions of the component partners. If the press connection, for example, in the installed state subjected to an internal pressure, so this can lead to strains and widening. Again, there is a risk of loosening the press connection and in the worst case of loosening the connection. To prevent this, therefore, the largest possible pressure should be generated, which in turn increases the tendency of the components to cold welding. Of course, with costly, precise and costly machining processes, such as fine grinding or honing, the tolerances can be narrowed and press joints improved.
- the aim is to produce as cost-effective components that are provided as turned parts, press connections between metallic component partners that hold securely and reliably over a long period of time while avoiding cold welding and tight.
- the press connections should be made very simple and inexpensive, which is why a separate operation of coating or oiling or heating of the component partners is omitted for shrinking.
- FIG. 2 an example of a thin-walled valve sleeve 6 is shown, which extends over a large part of the axial length of the fuel injection valve and in which the connecting pipe 44 ( FIG. 3 ) in a region a and the core 2 ( FIGS. 4 to 7 ) can be pressed in a region b and on which the valve jacket 5 (FIG. FIG. 8 ) can be pressed in a region c.
- the connecting pipe 44 correspondingly has an outer pressing area a ', which corresponds to the area a in the installed state in the valve sleeve 6 to a press connection.
- a and a ' are characterized areas that come in principle for a material contact in the press connection in question; however, it is by no means necessary to make the press connection over the entire length of a and a '.
- the connecting pipe 44 should be installed in the valve sleeve 6 with the lowest possible insertion force. By forming a defined short pressing area a ', the pressing length of minimized in the first place.
- the pressing area a 'of the connecting pipe 44 is raised in relation to the adjacent sections of the connecting pipe 44.
- fillets 59 are provided, which have a relatively large radius.
- the radii correspond, for example, to an angularity in the transitions of approximately 0.5 ° to 1.2 °.
- the connecting pipe 44 e.g. as an additional measure furrow-like or grooved grooves 61 provided on the surface, are interrupted by the zones of a possible cold welding again and again. Adverse "feeding zones" of the press connection are largely avoided.
- the grooves 61 e.g. run around, a high excess, because they are plastically deformed during pressing and leveling something.
- the generated profile of grooves 61 must have such a strength that, with a slight excess, the expansion of the valve sleeve 6 is still effected.
- the core 2 according to FIG. 4 correspondingly has an outer pressing region b ', which corresponds with the region b in the installed in the valve sleeve 6 to a press connection.
- b and b ' are characterized areas that come in principle for a material contact in the press connection in question; however, it is by no means necessary to make the press connection over the entire length of b and b '.
- the core 2 should cause a minimum elongation of the valve sleeve 6 during pressing; However, the maximum insertion force should be limited.
- FIG. 5 shows a detail view of serving as an inner pole core 2 with a first embodiment of the present invention configured circumferential pressing lip 65.
- the grooves 61 closes in the axial direction via an inlet rounding 59 or a relatively sharp-edged transition in the outer contour recessed, einichichige area 64, which in turn subsequently in a larger diameter area, which has the function of a pressing lip 65 passes.
- FIG. 6 shows an enlarged view of the section VI in FIG. 5 in the section of the core 2 described above.
- the transitions from the pressing region b 'to the recessed region 64 and from the recessed region 64 to the pressing lip 65 may be provided with inlet fillets 59 (as in FIG FIG. 4 be shown); but they can also be chamfer-like ( FIG. 6 ) or stepped.
- the joining partners slide off each other. This sliding can lead to abrasion due to the relatively soft material structure of the component partners, which can disadvantageously lead to contamination of the fuel injection valve.
- the additional protruding pressing lip 65 of the resulting during the actual pressing dirt and chambered in the cavity formed by the recessed portion 64 In this way, a rinse or other expensive cleaning can be omitted.
- the chambered cavity in the recessed area 64 abrasion is safely stored and thus can not get into other areas of the fuel injection valve and lead to functional impairment.
- FIG. 7 a detail view of serving as an inner pole core 2 with a second embodiment of a pressing lip 65 is shown.
- This embodiment is intended to illustrate that an adaptation of the outer diameter of the pressing lip 65 in dependence on the contour of the joining partner, here the thin-walled valve sleeve 6 may be attached.
- the press lip 65 in which in the FIGS. 5 and 6 illustrated embodiment has an outer diameter corresponding to that of the pressing portion b '
- the pressing lip 65 of the embodiment is according to FIG. 7 radially over the pressing area b 'over.
- the deepened Region 64 on the outer contour of the core 2 is provided, for example, with two sections which are of different depths.
- the pressing lip 65 is designed radially so far that a secure chambering of the possibly resulting during pressing abrasion is ensured.
- the pressing lip 65 protrudes in accordance with the diameter enlargement provided on the valve sleeve 6 by a bulging in relation to the pressing region b.
- the dotted lines in FIG. 7 are intended to indicate schematically at which points the core 2 in the pressed-in state rests in the valve sleeve 6, whereby a cavity results at the recessed area 64 between the core 2 and the valve sleeve 6.
- the components core 2 and valve sleeve 6 are in the FIGS. 5 to 7 selected only as an example; Press lips 65 may be provided on all fixed press connections of at least two metallic components 2, 5, 6, 44 of the fuel injection valve.
- the valve jacket 5 according to FIG. 8 correspondingly has an inner pressing region c ', which corresponds in the state applied to the valve sleeve 6 with the region c to a press connection.
- c and c ' are characterized areas that come in principle for a material contact in the press connection in question; however, it is by no means necessary to make the press connection over the entire length of c and c '.
- furrow-like or groove-like grooves 61 are provided on the surface, are interrupted by the zones of a possible cold welding again and again. Adverse "feeding zones" of the press connection are largely avoided.
- the grooves 61 which circulate for example, reduce a large excess, because they are plastically deformed during pressing and level slightly.
- the generated profile of grooves 61 must have such a strength that, with a slight oversize, a sufficient widening of the valve sleeve 6 for the tight fit of the core 2 is effected.
- the pressing length can be minimized from the outset.
- the pressing region c 'of the valve jacket 5 can also be designed to be raised in relation to the adjacent sections of the valve jacket 5, whereby the maximum pressing region c' is defined even more precisely.
- the transition of the pressing region c is provided with an inlet rounding 59 on an axial side, which has a relatively large radius.
- the radius corresponds for example to an angularity in the transition of about 0.5 ° to 1.2 °.
- pressing area a, b, c, a ', b', c ' is to a "dry coating" made, in which the pressing area a, b, c, a', b ', c' in a washing process with a industrial cleaner and a washing additive, eg SurTec® 104 is treated.
- the washing of the components 2, 5, 6, 44 selected therefor takes place e.g. by dipping, spraying or sprinkling.
- a 5-10% SurTec® 104 solution is used in the treatment of the pressing area a, b, c, a ', b', c '.
- Hitec solution for example Hitec® E536 from the company Ethyl Corp.
- the grooves 61 in the respective pressing region a, b, c, a ', b', c ' serve as a lubricant reservoir.
- the modular universal cleaner made of surfactant components SurTec® 089 can also be used.
- This cleaner with surfactants and corrosion protection components is particularly suitable for immersion cleaning.
- the metallic components 2, 5, 6, 44 are already cleaned before installation and protected by a passivation from corrosion.
- the drying of the components 2, 5, 6, 44 after the washing process takes place e.g. using vacuum dryers.
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- Combustion & Propulsion (AREA)
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Description
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention relates to a fuel injection valve according to the preamble of the main claim.
Aus der
Aus der
Aus der
Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass es auf besonders einfache Art und Weise kostengünstig herstellbar ist. Erfindungsgemäß zeichnet sich die feste Pressverbindung wenigstens zweierThe fuel injection valve according to the invention with the characterizing features of
metallischer Bauteile des Brennstoffeinspritzventils dadurch aus, dass beim Abgleiten der Fügepartner während des Einpressvorgangs der möglicherweise entstehende Abrieb sicher und zuverlässig zurückgehalten und in einem durch einen vertieften Bereich und eine Presslippe an der Außenkontur eines Fügepartners entstehenden Hohlraum gekammert wird. Auf diese Weise kann eine Spülung oder eine andere aufwändige Reinigung entfallen. Der im Hohlraum am vertieften Bereich gekammerte Abrieb ist sicher verwahrt und kann somit nicht in andere Bereiche des Brennstoffeinspritzventils gelangen und dort zu Funktionsbeeinträchtigungen führen. Metallic components of the fuel injection valve characterized in that the sliding of the joining partners during the press-fitting process, the possibly resulting abrasion is reliably and reliably retained and chambered in a resulting from a recessed area and a pressing lip on the outer contour of a joining partner cavity. In this way, a rinse or other expensive cleaning can be omitted. The chambered cavity in the recessed area abrasion is securely stored and thus can not get into other areas of the fuel injector and there lead to functional impairment.
Von Vorteil ist es, dass mit kostengünstigen Bauteilen, die als Tiefzieh- bzw. Drehteile bereitgestellt werden, Pressverbindungen zwischen metallischen Bauteilpartnern herstellbar sind, die sicher und zuverlässig über eine große Zeitdauer unter Vermeidung von Kaltverschweißungen fest und dicht halten. Dabei sind die Pressverbindungen sehr einfach und kostengünstig hergestellt, da in vorteilhafter Weise auf bekannte und üblicherweise notwendige separate Arbeitsgänge, wie Beschichten oder Einölen zum verbesserten Fügen der Bauteilpartner bzw. auf eine Erwärmung der Bauteilpartner zum Aufschrumpfen verzichtet werden kann. Wenigstens einer der Bauteilpartner weist in seinem Pressbereich eine Struktur mit Riefen auf und/oder der jeweilige Pressbereich besitzt in wenigstens einem Übergang zu einem angrenzenden Bauteilabschnitt eine Einlaufverrundung.It is advantageous that with cost-effective components, which are provided as thermoformed or turned parts, press connections between metallic component partners can be produced, which hold securely and reliably over a long period of time while avoiding cold welding and tight. In this case, the press connections are very simple and inexpensive to manufacture, since advantageously known and usually necessary separate operations, such as coating or oiling for improved joining of the component partners or heating of the component partners can be dispensed with for shrinking. At least one of the component partners has a structure with grooves in its pressing area and / or the respective pressing area has an inlet rounding in at least one transition to an adjacent component section.
Durch die Ausbildung eines definierten kurzen Pressbereichs kann die Presslänge von vornherein minimiert werden. Der Pressbereich eines ersten Bauteilpartners ist erhaben gegenüber den angrenzenden Abschnitten dieses Bauteilpartners ausgebildet. Im Übergang des Pressbereichs zu den axial auf beiden Seiten folgenden Abschnitten sind dabei Einlaufverrundungen vorgesehen, die einen relativ großen Radius aufweisen. Die Radien entsprechen in vorteilhafter einer Winkeligkeit in den Übergängen von ca. 0,5° bis 1,2°.By forming a defined short pressing area, the press length can be minimized from the outset. The pressing region of a first component partner is raised in relation to the adjacent sections of this component partner. In the transition of the pressing area to the axially following on both sides sections here inlet fillets are provided, which have a relatively large radius. The radii advantageously correspond to an angularity in the transitions of about 0.5 ° to 1.2 °.
Im Pressbereich des erste Bauteilpartners sind neben der Einlaufverrundungen 59 als zusätzliche Maßnahme furchen- bzw. rillenartige Riefen an der Oberfläche vorgesehen, durch die Zonen einer möglichen Kaltverschweißung immer wieder unterbrochen sind. Nachteilige "Fresszonen" der Pressverbindung werden so weitgehend vermieden. Außerdem reduzieren die Riefen, die z.B. umlaufen, ein hohes Übermaß, da sie beim Pressen plastisch verformt werden und sich etwas einebnen. Das erzeugte Profil aus Riefen muss jedoch eine solche Festigkeit aufweisen, dass bei geringem Übermaß die Dehnung eines zweiten Bauteilpartners noch bewirkt wird.In the pressing region of the first component partner furrows or groove-like grooves are provided on the surface in addition to the
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Brennstoffeinspritzventils möglich.The measures listed in the dependent claims advantageous refinements and improvements of the
Können sich die Bauteilpartner aufgrund ihrer Steifigkeit nicht dehnen oder stauchen oder sind sie vom Material her zu weich, wie z.B. weichmagnetische Chromstähle, die üblicherweise für die verschiedensten Bauteile eines elektromagnetisch angetriebenen Brennstoffeinspritzventils zum Einsatz kommen, so kommt es bei bekannten Pressverbindungen mit großer Wahrscheinlichkeit zu Kaltverschweißungen ("Fresser") während des Fügevorgangs des Einpressens, die aber durch die erfindungsgemäßen Maßnahmen insbesondere an Bauteilen aus weichmagnetischem Chromstahl vermieden werden. Es kann auf aufwändige genaue und kostenintensive Bearbeitungsverfahren, wie Feinschleifen oder Honen verzichtet werden, mit denen die Bauteiltoleranzen eingeengt werden könnten und mit erheblichem Aufwand die Pressverbindungen verbessert werden könnten.If the component partners can not stretch or compress due to their rigidity or if they are too soft in their material, such as soft magnetic chromium steels, which are usually used for the most diverse components of an electromagnetically driven fuel injection valve, cold welds are very likely to occur in known compression joints ("Eater") during the joining process of the pressing, but which are avoided by the inventive measures, in particular on components made of soft magnetic chrome steel. It can be dispensed with elaborate accurate and costly processing methods, such as fine grinding or honing, with which the component tolerances could be narrowed and with considerable effort, the press connections could be improved.
In besonders vorteilhafter Weise sind die zu verpressenden metallischen Bauteilpartner zumindest in ihren jeweiligen Pressbereichen mit einem Reiniger gewaschen. In Verbindung mit den Riefen ergeben sich im jeweiligen Pressbereich vorteilhafte Schmierstoffspeicher. Vorteilhafterweise kommen als Reiniger die korrosionsschützenden Universalreiniger SurTec® 104 oder SurTec® 089 oder Hitec® E536 der Fa. Ethyl Corp. zum Einsatz.In a particularly advantageous manner, the metal components to be pressed are washed with a cleaner, at least in their respective pressing areas. In combination with the grooves, advantageous lubricant reservoirs are produced in the respective pressing area. The anticorrosive universal cleaner SurTec® 104 or SurTec® 089 or Hitec® E536 from the company Ethyl Corp. Advantageously come as a cleaner. for use.
Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen
Figur 1- ein Brennstoffeinspritzventil gemäß dem Stand der Technik,
Figur 2- eine Detailansicht einer Ventilhülse,
- Figur 3
- eine Detailansicht eines Anschlussrohres,
- Figur 4
- eine Detailansicht eines als Innenpol dienenden Kerns, wobei die in den
Figuren 3 und4 gezeigten Ausführungen dem besseren Verstandnis dieren und von der Erfindung nicht umfasst sind Figur 5- eine Detailansicht eines als Innenpol dienenden Kerns mit einer ersten Ausführung einer Presslippe,
Figur 6- eine vergrößerte Ansicht des Ausschnitts VI in
,Figur 5 - Figur 7
- eine Detailansicht eines als Innenpol dienenden Kerns mit einer zweiten Ausführung einer Presslippe und
Figur 8- eine Detailansicht eines Ventilmantels in Form eines Magnettopfes.
- FIG. 1
- a fuel injection valve according to the prior art,
- FIG. 2
- a detailed view of a valve sleeve,
- FIG. 3
- a detailed view of a connection pipe,
- FIG. 4
- a detailed view of serving as an inner pole core, wherein in the
Figures 3 and4 shown embodiments the better understanding dieren and are not included in the invention - FIG. 5
- a detailed view of serving as an inner pole core with a first embodiment of a press lip,
- FIG. 6
- an enlarged view of section VI in
FIG. 5 . - FIG. 7
- a detailed view of serving as an inner pole core with a second embodiment of a pressing lip and
- FIG. 8
- a detailed view of a valve shell in the form of a magnet pot.
Zum besseren Verständnis der erfindungsgemäßen Maßnahmen wird im Folgenden anhand von
Das in der
Während die in einem Spulenkörper 3 eingebettete Magnetspule 1 eine Ventilhülse 6 von außen umgibt, ist der Kern 2 in einer inneren, konzentrisch zu einer Ventillängsachse 10 verlaufenden Öffnung 11 der Ventilhülse 6 eingebracht. Die z.B. ferritische Ventilhülse 6 ist lang gestreckt und dünnwandig ausgeführt. Die Öffnung 11 dient auch als Führungsöffnung für eine entlang der Ventillängsachse 10 axial bewegliche Ventilnadel 14. Die Ventilhülse 6 erstreckt sich in axialer Richtung z.B. über mehr als die Hälfte der axialen Gesamterstreckung des Brennstoffeinspritzventils.While embedded in a bobbin 3
Neben dem Kern 2 und der Ventilnadel 14 ist in der Öffnung 11 des weiteren ein Ventilsitzkörper 15 angeordnet, der an der Ventilhülse 6 z.B. mittels einer Schweißnaht 8 befestigt ist. Der Ventilsitzkörper 15 weist eine feste Ventilsitzfläche 16 als Ventilsitz auf. Die Ventilnadel 14 wird beispielsweise von einem rohrförmigen Ankerabschnitt 17, einem ebenfalls rohrförmigen Nadelabschnitt 18 und einem kugelförmigen Ventilschließkörper 19 gebildet, wobei der Ventilschließkörper 19 z.B. mittels einer Schweißnaht fest mit dem Nadelabschnitt 18 verbunden ist. An der stromabwärtigen Stirnseite des Ventilsitzkörpers 15 ist eine z.B. topfförmige Spritzlochscheibe 21 angeordnet, deren umgebogener und umfangsmäßig umlaufender Halterand 20 entgegen der Strömungsrichtung nach oben gerichtet ist. Die feste Verbindung von Ventilsitzkörper 15 und Spritzlochscheibe 21 ist z. B. durch eine umlaufende dichte Schweißnaht realisiert. Im Nadelabschnitt 18 der Ventilnadel 14 sind eine oder mehrere Queröffnungen 22 vorgesehen, so dass den Ankerabschnitt 17 in einer inneren Längsbohrung 23 durchströmender Brennstoff nach außen treten und am Ventilschließkörper 19 z.B. an Abflachungen 24 entlang bis zur Ventilsitzfläche 16 strömen kann.In addition to the
Die Betätigung des Einspritzventils erfolgt in bekannter Weise elektromagnetisch. Zur axialen Bewegung der Ventilnadel 14 und damit zum Öffnen entgegen der Federkraft einer an der Ventilnadel 14 angreifenden Rückstellfeder 25 bzw. Schließen des Einspritzventils dient der elektromagnetische Kreis mit der Magnetspule 1, dem inneren Kern 2, dem äußeren Ventilmantel 5 und dem Ankerabschnitt 17. Der Ankerabschnitt 17 ist mit dem dem Ventilschließkörper 19 abgewandten Ende auf den Kern 2 ausgerichtet.The actuation of the injection valve takes place in a known manner electromagnetically. For axial movement of the
Der kugelförmige Ventilschließkörper 19 wirkt mit der sich in Strömungsrichtung kegelstumpfförmig verjüngenden Ventilsitzfläche 16 des Ventilsitzkörpers 15 zusammen, die in axialer Richtung stromabwärts einer Führungsöffnung im Ventilsitzkörper 15 ausgebildet ist. Die Spritzlochscheibe 21 besitzt wenigstens eine, beispielsweise vier durch Erodieren, Laserbohren oder Stanzen ausgeformte Abspritzöffnungen 27.The spherical
Die Einschubtiefe des Kerns 2 im Einspritzventil ist unter anderem entscheidend für den Hub der Ventilnadel 14. Dabei ist die eine Endstellung der Ventilnadel 14 bei nicht erregter Magnetspule 1 durch die Anlage des Ventilschließkörpers 19 an der Ventilsitzfläche 16 des Ventilsitzkörpers 15 festgelegt, während sich die andere Endstellung der Ventilnadel 14 bei erregter Magnetspule 1 durch die Anlage des Ankerabschnitts 17 am stromabwärtigen Kernende ergibt. Die Hubeinstellung erfolgt durch ein axiales Verschieben des beispielsweise durch ein spanendes Verfahren wie Drehen hergestellten Kerns 2, der entsprechend der gewünschten Position nachfolgend fest mit der Ventilhülse 6 verbunden wird.Among other things, the insertion depth of the
In eine konzentrisch zu der Ventillängsachse 10 verlaufende Strömungsbohrung 28 des Kerns 2, die der Zufuhr des Brennstoffs in Richtung der Ventilsitzfläche 16 dient, ist außer der Rückstellfeder 25 ein Einstellelement in der Form einer Einstellhülse 29 eingeschoben. Die Einstellhülse 29 dient zur Einstellung der Federvorspannung der an der Einstellhülse 29 anliegenden Rückstellfeder 25, die sich wiederum mit ihrer gegenüberliegenden Seite an der Ventilnadel 14 abstützt, wobei auch eine Einstellung der dynamischen Abspritzmenge mit der Einstellhülse 29 erfolgt. Ein Brennstofffilter 32 ist oberhalb der Einstellhülse 29 in der Ventilhülse 6 angeordnet.In a concentric with the valve
Das bis hierher beschriebene Einspritzventil zeichnet sich durch seinen besonders kompakten Aufbau aus, so dass ein sehr kleines, handliches Einspritzventil entsteht. Diese Bauteile bilden eine vormontierte eigenständige Baugruppe, die nachfolgend Funktionsteil 30 genannt wird. Das Funktionsteil 30 umfasst also im wesentlichen den elektromagnetischen Kreis 1, 2, 5 und ein Dichtventil (Ventilschließkörper 19, Ventilsitzkörper 15) mit einem nachfolgenden Strahlaufhereitungselement (Spritzlochscheibe 21) sowie als Grundkörper die Ventilhülse 6.The injector described so far is characterized by its particularly compact design, so that a very small, handy injection valve is created. These components form a preassembled independent assembly, which is called
Unabhängig vom Funktionsteil 30 wird eine zweite Baugruppe erzeugt, die im folgenden als Anschlussteil 40 bezeichnet wird. Das Anschlussteil 40 zeichnet sich vor allen Dingen dadurch aus, dass es den elektrischen und den hydraulischen Anschluss des Brennstoffeinspritzventils umfasst. Das weitgehend als Kunststoffteil ausgeführte Anschlussteil 40 besitzt deshalb einen als Brennstoffeinlassstutzen dienenden rohrförmigen Grundkörper 42. Eine konzentrisch zur Ventillängsachse 10 verlaufende Strömungsbohrung 43 eines inneren Anschlussrohres 44 im Grundkörper 42 dient als Brennstoffeinlass und wird von dem zuströmseitigen Ende des Brennstoffeinspritzventils aus in axialer Richtung vom Brennstoff durchströmt.Regardless of the
Eine hydraulische Verbindung von Anschlussteil 40 und Funktionsteil 30 wird beim vollständig montierten Brennstoffeinspritzventil dadurch erreicht, dass die Strömungsbohrungen 43 und 28 beider Baugruppen so zueinander gebracht werden, dass ein ungehindertes Durchströmen des Brennstoffs gewährleistet ist. Bei der Montage des Anschlussteils 40 an dem Funktionsteil 30 ragt ein unteres Ende 47 des Anschlussrohres 44 zur Erhöhung der Verbindungsstabilität in die Öffnung 11 der Ventilhülse 6 hinein. Der Grundkörper 42 aus Kunststoff kann auf das Funktionsteil 30 aufgespritzt werden, so dass der Kunststoff unmittelbar Teile der Ventilhülse 6 sowie des Ventilmantels 5 umgibt. Eine sichere Abdichtung zwischen dem Funktionsteil 30 und dem Grundkörper 42 des Anschlussteils 40 wird beispielsweise über eine Labyrinthdichtung 46 am Umfang des Ventilmantels 5 erzielt.A hydraulic connection of connecting
Zu dem Grundkörper 42 gehört auch ein mitangespritzter elektrischer Anschlussstecker 56. An ihrem dem Anschlussstecker 56 gegenüberliegenden Ende sind die Kontaktelemente mit der Magnetspule 1 elektrisch verbunden.To the
In den
Um metallische Bauteile im Brennstoffeinspritzventil fest miteinander zu verbinden, bieten sich Presspassungen zwischen den beiden zu befestigenden Bauteilen an. Presspassungen führen aber allgemein in den Bauteilen zu Stauchungen oder Dehnungen plastischer oder elastischer Art, je nach Toleranzlage, Werkstoff und Bauteilgeometrie. Können sich die Bauteilpartner aufgrund ihrer Steifigkeit nicht dehnen oder stauchen oder sind sie vom Material her zu weich, wie z.B. weichmagnetische Chromstähle als besonders geeignete Edelstähle, so kommt es mit großer Wahrscheinlichkeit zu Kaltverschweißungen ("Fresser") während dem Fügevorgang des Einpressens. Zu beachten sind außerdem die Einbaubedingungen der Bauteilpartner. Ist die Pressverbindung z.B. im verbauten Zustand mit einem Innendruck beaufschlagt, so kann dies zu Dehnungen und Aufweitungen führen. Dabei besteht wiederum die Gefahr des Lockerns der Pressverbindung und im schlimmsten Fall des Lösens der Verbindung. Um dies zu verhindern, sollte also eine möglichst große Pressung erzeugt werden, was aber wiederum die Neigung der Bauteile zu Kaltverschweißungen erhöht. Mit aufwendigen genauen und kostenintensiven Bearbeitungsverfahren, wie Feinschleifen oder Honen können die Toleranzen selbstverständlich eingeengt werden und Pressverbindungen verbessert werden.To firmly connect metallic components in the fuel injection valve, press fits between the two components to be fastened are appropriate. But press fits generally lead in the components to compressions or strains plastic or elastic type, depending on the tolerance position, material and component geometry. If the component partners can not stretch or compress due to their rigidity or if they are too soft in their material, such as soft magnetic chromium steels as particularly suitable stainless steels, it is very likely that cold welds ("eaters") will occur during the joining process. Also note the installation conditions of the component partners. If the press connection, for example, in the installed state subjected to an internal pressure, so this can lead to strains and widening. Again, there is a risk of loosening the press connection and in the worst case of loosening the connection. To prevent this, therefore, the largest possible pressure should be generated, which in turn increases the tendency of the components to cold welding. Of course, with costly, precise and costly machining processes, such as fine grinding or honing, the tolerances can be narrowed and press joints improved.
Ziel ist es jedoch, mit möglichst kostengünstigen Bauteilen, die als Drehteile bereitgestellt werden, Pressverbindungen zwischen metallischen Bauteilpartnern herzustellen, die sicher und zuverlässig über eine große Zeitdauer unter Vermeidung von Kaltverschweißungen fest und dicht halten. Dabei sollen die Pressverbindungen jedoch sehr einfach und kostengünstig hergestellt werden, weshalb auf einen separaten Arbeitsgang des Beschichtens oder des Einölens bzw. eine Erwärmung der Bauteilpartner zum Aufschrumpfen verzichtet wird.The aim, however, is to produce as cost-effective components that are provided as turned parts, press connections between metallic component partners that hold securely and reliably over a long period of time while avoiding cold welding and tight. However, the press connections should be made very simple and inexpensive, which is why a separate operation of coating or oiling or heating of the component partners is omitted for shrinking.
In der
Das Anschlussrohr 44 gemäß
Im Pressbereich a' des Anschlussrohres 44 sind z.B. als zusätzliche Maßnahme furchen- bzw. rillenartige Riefen 61 an der Oberfläche vorgesehen, durch die Zonen einer möglichen Kaltverschweißung immer wieder unterbrochen sind. Nachteilige "Fresszonen" der Pressverbindung werden so weitgehend vermieden. Außerdem reduzieren die Riefen 61, die z.B. umlaufen, ein hohes Übermaß, da sie beim Pressen plastisch verformt werden und sich etwas einebnen. Das erzeugte Profil aus Riefen 61 muss jedoch eine solche Festigkeit aufweisen, dass bei geringem Übermaß die Dehnung der Ventilhülse 6 noch bewirkt wird.In the pressing area a 'of the connecting
Der Kern 2 gemäß
Beim Einpressen gleiten die Fügepartner aneinander ab. Bei diesem Abgleiten kann es aufgrund der relativ weichen Materialstruktur der Bauteilpartner zu Abrieb kommen, der in nachteiliger Weise zu einer Verschmutzung des Brennstoffeinspritzventils führen kann. In vorteilhafter Weise wird durch die zusätzliche überstehende Presslippe 65 der während des eigentlichen Einpressens entstehende Schmutz zurückgehalten und in dem durch den vertieften Bereich 64 entstehenden Hohlraum gekammert. Auf diese Weise kann eine Spülung oder eine andere aufwändige Reinigung entfallen. Der im Hohlraum am vertieften Bereich 64 gekammerte Abrieb ist sicher verwahrt und kann somit nicht in andere Bereiche des Brennstoffeinspritzventils gelangen und dort zu Funktionsbeeinträchtigungen führen.When pressing in, the joining partners slide off each other. This sliding can lead to abrasion due to the relatively soft material structure of the component partners, which can disadvantageously lead to contamination of the fuel injection valve. Advantageously, retained by the additional protruding
In der
Der Ventilmantel 5 gemäß
An der Ventilhülse 6 ist z.B. auf einer axialen Seite der Übergang des Pressbereichs c mit einer Einlaufverrundung 59 versehen, die einen relativ großen Radius aufweist. Der Radius entspricht z.B. einer Winkeligkeit in dem Übergang von ca. 0,5° bis 1,2°.On the
Zusätzlich zu den Maßnehmen zum Herstellen einer festen Pressverbindung wenigstens zweier metallischer Bauteile 2, 5, 6, 44 des Brennstoffeinspritzventils mit dem Vorsehen einer Struktur aus Riefen 61 im Pressbereich a, b, c, a', b', c' und/oder dem Anbringen einer Einlaufverrundung 59 in wenigstens einem Übergang von dem jeweiligen Pressbereich a, b, c, a', b', c' zu einem angrenzenden Bauteilabschnitt kann noch eine weitere Maßnahme besonders wirkungsvoll zur Verbesserung der metallischen Pressverbindung unter Vermeidung von nachteiligen Kaltverschweißungen beitragen. Im jeweils gewünschten Pressbereich a, b, c, a', b', c' wird dazu ein "trockenes Beschichten" vorgenommen, bei dem der Pressbereich a, b, c, a', b', c' in einem Waschvorgang mit einem industriellen Reiniger und einem Waschzusatz, z.B. SurTec® 104 behandelt wird. Das Waschen der dazu ausgewählten Bauteile 2, 5, 6, 44 erfolgt z.B. mittels Tauchen, Besprühen oder Beträufeln. In idealer Weise wird bei der Behandlung des Pressbereichs a, b, c, a', b', c' eine 5 - 10%-ige SurTec® 104-Lösung verwendet. Alternativ kann auch eine Hitec-Lösung (z.B. Hitec® E536 der Fa. Ethyl Corp.) mit 5 - 30%, in Prüfflüssigkeit für Einspritzaggregate gelöst, verwendet werden. Die Riefen 61 im jeweiligen Pressbereich a, b, c, a', b', c' dienen dabei als Schmierstoffspeicher.In addition to the measures for making a solid press connection of at least two
Alternativ zum Universalreiniger SurTec® 104 kann z.B. auch der modulare Universalreiniger aus Tensidkomponenten SurTec® 089 eingesetzt werden. Dieser Reiniger mit Tensiden und Korrosionsschutzkomponenten eignet sich besonders für die Tauchreinigung. Durch die Behandlung mit solchen Universalreinigern sind die metallischen Bauteile 2, 5, 6, 44 vor der Montage bereits gereinigt und durch eine Passivierung vor Korrosion geschützt. Das Trocknen der Bauteile 2, 5, 6, 44 nach dem Waschvorgang erfolgt z.B. mittels Vakuumtrocknern.As an alternative to the universal cleaner SurTec® 104, e.g. The modular universal cleaner made of surfactant components SurTec® 089 can also be used. This cleaner with surfactants and corrosion protection components is particularly suitable for immersion cleaning. By treating with such universal cleaners, the
Claims (7)
- Fuel injection valves for fuel injection systems of internal combustion engines, having a valve longitudinal axis (10), having an excitable actuator (1, 2, 17) for actuating a valve closing body (19) which interacts with a valve seat surface (16) provided on a valve seat body (15), and having at least one discharge opening (27), and having metallic components which are firmly connected to one another by pressing, characterized in that the firm press-fit connection of at least two metallic components (2, 5, 6, 44) of the fuel injection valve is distinguished in that at least the first component partner (2, 5, 44) has, in its press-fit region (b', c'), a structure with grooves (61), and the respective press-fit region (b, c) of the second component partner (6) has, in at least one transition to an adjoining component portion, a lead-in rounding (59), wherein the press-fit region (b', c') of the first component partner (2, 5, 44) is formed so as to be raised in relation to the adjoining component portions, wherein the lead-in roundings (59) have a radius which corresponds to an angularity at the transitions of 0.5° to 1.2°,
and proceeding from the press-fit region (b', c') of the first component partner (2, 5, 44), the outer contour of said first component partner (2, 5, 44) is adjoined by firstly a sunken region (64) and, following the latter, a press-fit lip (65) which protrudes radially further outward, wherein the press-fit lip (65) corresponds to the opposite second component partner (6) such that, between the press-fit region (b, c) of the second component partner (6) and the press-fit lip (65), a cavity is formed by the sunken region (64), in which cavity dirt generated during the pressing-in process is retained. - Fuel injection valve according to Claim 1,
characterized in that the sunken region (64) is formed in the manner of a recess. - Fuel injection valve according to Claim 1 or 2,
characterized in that the transitions from the press-fit region (b', c') of the first component partner (2, 5, 44) to the sunken region (64) and from the sunken region (64) to the press-fit lip (65) run in a rounded manner, obliquely in the manner of a bevel, or in a stepped manner. - Fuel injection valve according to one of the preceding claims, characterized in that the outer diameter of the press-fit lip (65) corresponds to that of the press-fit region (b', c') of the first component partner (2, 5, 44), or the outer diameters of the press-fit lip (65) and of the press-fit region (b', c') are different.
- Fuel injection valve according to one of the preceding claims, characterized in that the grooves (61) in the press-fit region (b', c') of the first component partner (2, 5, 44) are of encircling form.
- Fuel injection valve according to one of the preceding claims, characterized in that, as a second component partner, there is provided a thin-walled valve sleeve (6) into which, as a first component partner, a connecting pipe (44) and/or a core (2) is pressed and/or onto which a valve casing (5) is pressed.
- Fuel injection valve according to one of the preceding claims, characterized in that the metallic component partners (2, 5, 6, 44) which are connected to one another by means of the firm press-fit connection are composed of a high-grade steel, for example a soft-magnetic chromium steel.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102007008863A DE102007008863A1 (en) | 2005-08-26 | 2007-02-23 | Fuel injector |
PCT/EP2008/051293 WO2008101791A1 (en) | 2007-02-23 | 2008-02-01 | Fuel injection valve |
Publications (2)
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EP2126332A1 EP2126332A1 (en) | 2009-12-02 |
EP2126332B1 true EP2126332B1 (en) | 2012-09-26 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP08708598A Not-in-force EP2126332B1 (en) | 2007-02-23 | 2008-02-01 | Fuel injection valve |
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US (1) | US9200604B2 (en) |
EP (1) | EP2126332B1 (en) |
JP (1) | JP5312350B2 (en) |
CN (1) | CN101617117B (en) |
DE (1) | DE102007008863A1 (en) |
WO (1) | WO2008101791A1 (en) |
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DE10103933A1 (en) * | 2001-01-30 | 2002-08-14 | Bosch Gmbh Robert | Fuel injector |
JP3829704B2 (en) * | 2001-11-30 | 2006-10-04 | 株式会社デンソー | Fuel injection valve |
JP3719978B2 (en) * | 2001-12-27 | 2005-11-24 | 株式会社日立製作所 | Fuel injection valve |
JP2003328901A (en) * | 2002-05-13 | 2003-11-19 | Hitachi Unisia Automotive Ltd | Fuel injection valve |
US6978950B2 (en) * | 2003-02-21 | 2005-12-27 | Siemens Vdo Automotive Corporation | High flow, tubular closure member for a fuel injector |
EP1649160B1 (en) * | 2003-07-17 | 2009-08-19 | Ganser-Hydromag Ag | Fuel injection valve for internal combustion engines |
DE10334785A1 (en) * | 2003-07-30 | 2005-02-24 | Robert Bosch Gmbh | Fuel injection valve and method for its assembly |
GB2404494B (en) | 2003-07-30 | 2006-08-09 | Cqr Security Components Ltd | Call point for an alarm system |
DE102004010174B4 (en) * | 2004-03-02 | 2017-04-06 | Robert Bosch Gmbh | Pressing composite of a metal part and a plastic part |
US7128281B2 (en) * | 2004-06-03 | 2006-10-31 | Siemens Vdo Automotive Corporation | Modular fuel injector with a damper member and method of reducing noise |
DE102004042573B3 (en) | 2004-09-02 | 2005-10-13 | Novar Gmbh | Fire alarm trigger switch has countersunk frame around cover plate linked to lever-action switch and test spindle |
DE102005025953A1 (en) * | 2005-06-06 | 2006-12-07 | Siemens Ag | Compensator e.g. for injection valve, has pot shaped body with pot base and recess with piston provided at axially extending guide of piston having clearance fit of recess |
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DE102005040363B4 (en) * | 2005-08-26 | 2017-09-14 | Robert Bosch Gmbh | Fuel injector |
DE102005040361A1 (en) * | 2005-08-26 | 2007-03-01 | Robert Bosch Gmbh | Metallic components for electromagnetically operated fuel injection valve, have surface-roughening structure that is provided by laser, where metal oxides such as chrome oxides are deposited in roughening structure |
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-
2007
- 2007-02-23 DE DE102007008863A patent/DE102007008863A1/en not_active Ceased
-
2008
- 2008-02-01 EP EP08708598A patent/EP2126332B1/en not_active Not-in-force
- 2008-02-01 JP JP2009550260A patent/JP5312350B2/en not_active Expired - Fee Related
- 2008-02-01 CN CN2008800058876A patent/CN101617117B/en not_active Expired - Fee Related
- 2008-02-01 WO PCT/EP2008/051293 patent/WO2008101791A1/en active Application Filing
- 2008-02-01 US US12/308,633 patent/US9200604B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20030141390A1 (en) * | 2002-01-18 | 2003-07-31 | Tetsuharu Matsuo | Fuel injection device having stationary core and movable core |
DE10349633A1 (en) * | 2003-10-24 | 2005-05-19 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engine, especially in motor vehicle, has valve seat support pressed into valve housing under elastic deformation and/or plastic deformation of valve seat support and/or valve housing |
Also Published As
Publication number | Publication date |
---|---|
US9200604B2 (en) | 2015-12-01 |
DE102007008863A1 (en) | 2008-08-28 |
US20110259299A1 (en) | 2011-10-27 |
JP5312350B2 (en) | 2013-10-09 |
JP2010519451A (en) | 2010-06-03 |
CN101617117B (en) | 2013-06-19 |
WO2008101791A1 (en) | 2008-08-28 |
EP2126332A1 (en) | 2009-12-02 |
CN101617117A (en) | 2009-12-30 |
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