WO2003054383A1 - Fixing device - Google Patents
Fixing device Download PDFInfo
- Publication number
- WO2003054383A1 WO2003054383A1 PCT/DE2002/004659 DE0204659W WO03054383A1 WO 2003054383 A1 WO2003054383 A1 WO 2003054383A1 DE 0204659 W DE0204659 W DE 0204659W WO 03054383 A1 WO03054383 A1 WO 03054383A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fastening device
- fuel
- spring clip
- spring
- fuel injector
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
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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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
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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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
-
- 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
- F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
-
- 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
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa
Definitions
- the invention is based on a fastening device for fastening a fuel injection valve in a cylinder head of an internal combustion engine and for connecting the fuel injection valve to a fuel distributor line according to the preamble of the main claim.
- a disadvantage of the fastening device known from DE 29 26 490 C2 is, in particular, the bracing effect of the various mounting parts on the fuel injector.
- the force flow generated in the fuel injector leads to deformations and thus to changes in the stroke of the valve needle up to jamming and to a pressure or bending load on the housing parts, which are generally thin-walled and welded to one another at several points.
- each fastening measure leads, for example, to an increase in the radial expansion of the fuel injection valve, and thus to an increased space requirement during installation, due to a support collar.
- Spring tabs is held together and therefore there is no need to attach the fuel injector to the cylinder head.
- the fastening device ensures both a transfer of the elastic spring tabs
- the wave-shaped spring tabs can be produced in a simple manner and, due to the elastic connection with the spring sleeve, ensure simple assembly and secure clamping of the components.
- both the fastening device and the elastic spring tabs can be produced in a simple manner by stamping from sheet metal. Manufacturing by deep drawing and punching is also possible.
- screws or clamping claws for fastening to the end face of the cylinder head are advantageously omitted.
- Fig. 1 is a schematic, partially sectioned view of an embodiment of an inventive fastening device for a
- Fig. 2. is a perspective view of the fastening device according to the invention.
- 3A-D are schematic views of the embodiment of a fastening device according to the invention shown in FIG. 1.
- Description of the embodiment 1 shows a schematic partial section through an exemplary embodiment of a fastening device for a fuel injector designed according to the invention on a fuel distributor line.
- a fuel injector 1 is designed in the form of a direct injection fuel injector 1, which is installed in a valve seat 20 of a cylinder head 2 for the direct injection of fuel into a combustion chamber of a mixture compression-ignition internal combustion engine, not shown, in particular.
- the valve receptacles 20 can also be provided on an ähmestutzen a suction pipe, not shown.
- the fuel injection valve 1 has at an inlet end 3 a plug connection to a receiving connector of a fuel distributor line 4, which is sealed by a seal 5 between the fuel distributor line 4 and a supply connector 6 of the fuel injector 1.
- the fuel injector 1 has an electrical connection 7 for the electrical contacting for actuating the fuel injector 1.
- Fastening device 10 consists of a spring clip
- Fuel distribution line 4 and on the other hand is supported on a shoulder 13 of the fuel injection valve 1.
- Spring clip 11 is preferably punched out of spring steel sheet. Also by punching two
- FIGS. 2 and 3A to 3D Views in FIGS. 2 and 3A to 3D and the following
- the spring clip 11 can be slotted in the area of the electrical connection 7 of the fuel injection valve 1 in order to facilitate the .assembly. Due to the spring clip 11 made of spring steel sheet, the slotted shape has no effect on the reliability of the fastening device 10.
- the spring clip 11 can preferably have projections 15 which are formed in the area of the spring clip 11 facing the fuel injector 1.
- the projections 15 are slightly bent inwards and in turn slightly bent outwards at their ends. On the one hand, this makes it easier to slide the spring clip 11 onto the fuel injection valve 1 and, on the other hand, ensures that the spring clip 11 is held securely on the fuel injection valve 1.
- Fig. 2 shows a schematic, perspective view of the spring clip 11 in the unassembled state.
- the spring clip 11 can be produced by stamping from spring steel. It is punched out of one piece including the spring tabs 14 and then bent into its intended shape.
- the spring tabs 14 are wave-shaped and folded inwards so that, as can be seen in FIG. 1, they engage under the shoulder 12 of the fuel rail 4. Due to the shape of the spring tabs 14 and their elastic connection with the spring clip 11, the fuel injector zventil 1 is braced against the fuel rail 4.
- FIGS. 1 and 2 illustrate schematic views and partial sections of the exemplary embodiment of a fastening device 10 according to the invention shown in FIGS. 1 and 2 in the non-assembled state of the fastening device 10.
- FIGS. 1 and 2 show schematic views and partial sections of the exemplary embodiment of a fastening device 10 according to the invention shown in FIGS. 1 and 2 in the non-assembled state of the fastening device 10.
- 3A shows a front view of the fastening device 10 designed according to the invention
- FIG. 3B shows a side view
- FIG. 3C shows a bottom view
- FIG. 3D shows a partial section through the spring clip 11 along the line IIID-IIID in FIG. 3A.
- the projections 15 are bent out at their ends in a chamfer-like manner.
- the projections 15 can also engage undercuts 17 in a plastic casing 18 of the fuel injector 1.
- the wavy spring tabs 14 are particularly clear. recognizable.
- the shape of the spring tabs 14 'on the one hand enables the fuel injection valve 1 to be braced against the fuel distributor line 4 and on the other hand simple manufacture and assembly of the spring clip 11.
- tabs 19 are provided which are bent into the spring clip opposite the starting points of the spring tabs 14. With increased pressure of the fuel distributor line 4 on the spring tabs 14, these rest on the tabs 19. The spring effect is retained by the arched shape of the spring tabs 14.
- the recesses 16, which are penetrated by the shoulder 12 of the fuel distributor line 4 are also clearly visible.
- the intervention of the fuel distribution line 4 'in the recesses 16 ensures on the one hand that . the fuel injector 1 can not twist in the cylinder head, and on the other hand that the fuel injector 1 if necessary with the
- Fuel distributor line 4 as an overall component on
- Cylinder head 2 of the internal combustion engine can be assembled and disassembled.
- Fastening device 10 becomes a reliable one
- the resilient shape of the spring clip 11 and the spring tabs 14 can ensure that the spring clip 11 bears against both the fuel injector 1 and the fuel distributor line 4 and thereby exerts a centering effect. This also bending forces on the fuel injector 1, which can lead to misalignments of the valve needle up to the jamming can 'be avoided.
- the resilient bracing of the components against one another can compensate for manufacturing tolerances and changes in length due to heating during operation of the internal combustion engine.
- Combustion chamber of a self-igniting internal combustion engine applicable.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Befestigungs orrichtung Fastening device
Stand der TechnikState of the art
Die Erfindung geht aus von einer Befestigungsvorrichtung zur Befestigung eines Brennstoffeinspritzventils in einem Zylinderkopf einer Brennkraftmaschine sowie zur Verbindung des Brennstoffeinspritzventils mit einer Brennstoffverteilerleitung nach der Gattung des Hauptanspruchs .The invention is based on a fastening device for fastening a fuel injection valve in a cylinder head of an internal combustion engine and for connecting the fuel injection valve to a fuel distributor line according to the preamble of the main claim.
Es ist bereits aus der DE 29 26 490 C2 eine Befestigungsvorrichtung für ein Brennstoffeinspritzventil zur Befestigung an einem Saugrohr bekannt, bei welcher die axiale Fixierung des Brennstoffeinspritzventils an der BrennstoffVerteilerleitung bzw. an einem Stecknippel durch ein Befestigungselement erfolgt, das als U-förmige Sicherungsklammer gestaltet ist, die mit zwei in radialer Richtung federnden . Schenkeln versehen ist . Die' Sicherungsklammer greift dabei im montierten Zustand durch entsprechende Aussparungen des Stecknippels und ist in eine als Ringnut ausgebildete Ausnehmung in einem Anschlußstutzen des. Brennstoffeinspritzventils einrastbar. Das axiale Spiel zwischen den Aussparungen und der Sicherungsklammer sowie zwischen der Ringnut und der Sicherungsklammer soll dabei klein gehalten werden, um . eine exakte Fixierung des Brennstoffeinspritzventils ohne Verspannungen der Dichtung zu erreichen.It is already known from DE 29 26 490 C2 a fastening device for a fuel injector for fastening to an intake manifold, in which the fuel injector is axially fixed to the fuel distributor line or to a plug nipple by means of a fastening element which is designed as a U-shaped securing clip that with two resilient in the radial direction. Thighs is provided. The 'securing clip engages in the assembled state through corresponding cutouts in the plug-in nipple and can be snapped into a recess in the form of an annular groove in a connecting piece of the fuel injector. The axial play between the recesses and the securing clip and between the annular groove and the securing clip should be kept small in order to . an exact fixation of the To reach the fuel injector without tightening the seal.
Nachteilig an der aus der DE 29 26 490 C2 bekannten Befestigungsvorrichtung ist insbesondere die verspannende Wirkung der verschiedenen Halterungsteile auf das Brennstoffeinspritzventil . Der im Brennstoffeinspritzventil erzeugte Kraftfluß führt zu Verformungen und somit zu Hubänderungen der Ventilnadel bis zum Verklemmen sowie zu einer Druck- oder Biegebelastung der Gehäuseteile, die im allgemeinen dünnwandig und an mehreren Stellen miteinander verschweißt sind. Zudem führt jede Befestigungsmaßnahme beispielsweise durch einen Auflagebund zu einer Vergrößerung der radialen Ausdehnung des Brennstoffeinspritzventils und damit zu einem erhöhten Platzbedarf beim Einbau.A disadvantage of the fastening device known from DE 29 26 490 C2 is, in particular, the bracing effect of the various mounting parts on the fuel injector. The force flow generated in the fuel injector leads to deformations and thus to changes in the stroke of the valve needle up to jamming and to a pressure or bending load on the housing parts, which are generally thin-walled and welded to one another at several points. In addition, each fastening measure leads, for example, to an increase in the radial expansion of the fuel injection valve, and thus to an increased space requirement during installation, due to a support collar.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Befestigungsvorrichtung für ein Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß dasThe fastening device according to the invention for a fuel injector with the characterizing features of the main claim has the advantage that the
Brennstoffeinspritzventil mit der Brennstoffverteilerleitung durch eine -dazwischen eingespannte Federklammer mitFuel injector with the fuel rail through a spring clip clamped in between
Federlaschen zusammengehalten wird und demzufolge eine Befestigung des Brennstoffeinspritzventils am Zylinderkopf entfällt. Die Befestigungsvorrichtung sorgt durch die elastischen Federlaschen sowohl für einen Übertrag derSpring tabs is held together and therefore there is no need to attach the fuel injector to the cylinder head. The fastening device ensures both a transfer of the elastic spring tabs
Niederhaltekraft der Brennstoffverteilerleitung auf dasHold-down force of the fuel rail on the
Brennstoffeinspritzventil als auch für eine Toleranzen und Versätze ausgleichende flexible Fixierung.Fuel injection valve as well as flexible fixation to compensate for tolerances and offsets.
Die wellenförmig ausgebildeten Federlaschen sind in einfacher Weise herstellbar und sorgen durch die elastische Verbindung mit der Federhülse für eine einfache Montage und eine sichere Verspannung der Bauteile .The wave-shaped spring tabs can be produced in a simple manner and, due to the elastic connection with the spring sleeve, ensure simple assembly and secure clamping of the components.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Befestigungsvorrichtung möglich. Von Vorteil ist insbesondere, daß sowohl die Befestigungsvorrichtung als auch die elastischen Federlaschen in einfacher Weise durch Stanzen aus Blech herstellbar sind. Auch eine Herstellung durch Tiefziehen und Stanzen ist möglich.The measures listed in the subclaims enable advantageous developments and improvements of the fastening device specified in the main claim. It is particularly advantageous that both the fastening device and the elastic spring tabs can be produced in a simple manner by stamping from sheet metal. Manufacturing by deep drawing and punching is also possible.
Vorteilhafterweise entfallen bei der erfindungsgemäßen Befestigungsvorrichtung Schrauben oder Spannpratzen zur Befestigung an der Stirnseite des Zylinderkopfes.In the fastening device according to the invention, screws or clamping claws for fastening to the end face of the cylinder head are advantageously omitted.
Ausgestanzte Ausnehmungen und Hinterschnitte sorgen bei einfacher Herstellbarkeit vorteilhafterweise für eine sichere Fixierung der Befestigungsvorrichtung am Brennstoffeinspritzventil und an derPunched-out recesses and undercuts advantageously ensure a secure fixation of the fastening device on the fuel injector and on the easy manufacture
BrennstoffVerteilerleitung .Fuel distribution line.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1 eine schematische, teilweise geschnittene Ansicht eines Ausführungsbeispiels einer erfindungsgemäß ausgestalteten Befestigungsvorrichtung für einFig. 1 is a schematic, partially sectioned view of an embodiment of an inventive fastening device for a
Brennstoffeinspritzventil an einer Brennstoff -Fuel injector on a fuel -
Verteilerleitung;Distribution line;
Fig. 2. eine perspektivische Ansicht der erfindungsgemäßen Befestigungsvorrichtung undFig. 2. is a perspective view of the fastening device according to the invention and
Fig. 3A-D schematische Ansichten des in Fig. 1 dargestellten Ausführungsbeispiels einer erfindungsgemäßen Befestigungsvorrichtung.3A-D are schematic views of the embodiment of a fastening device according to the invention shown in FIG. 1.
Beschreibung des Ausführungsbeispiels Fig. 1 zeigt einen schematisierten Teilschnitt durch ein Ausführungsbeispiel einer erfindungsgemäß ausgestalteten Befestigungsvorrichtung für ein Brennstoffeinspritzventil an einer BrennstoffVerteilerleitung .Description of the embodiment 1 shows a schematic partial section through an exemplary embodiment of a fastening device for a fuel injector designed according to the invention on a fuel distributor line.
Ein Brennstoffeinspritzventil 1 ist dabei in Form eines direkt einspritzenden Brennstoffeinspritzventils 1 ausgeführt, das zum direkten Einspritzen von Brennstoff in einen Brennraum einer nicht weiter dargestellten, insbesondere gemischverdichtenden, fremdgezündeten Brennkraftmaschine in einer Ventilaufnähme 20 eines Zylinderkopfs 2 eingebaut ist. Die Ventilaufnähme 20 kann ebenso an einem Auf ähmestutzen eines nicht dargestellten Ansaugrohrs vorgesehen sein. Das Brennstoffeinspritzventil 1 weist an einem Zulaufseitigen Ende 3 eine Steckverbindung zu einem Aufnahmestutzen einer Brennstoffverteilerleitung 4 auf, die durch eine Dichtung 5 zwischen der Brennstoffverteilerleitung 4 und einem Zuleitungsstutzen 6 des Brennstoffeinspritzventils 1 abgedichtet ist. Das Brennstoffeinspritzventil 1 verfügt über einen elektrischen Anschluß 7 für die elektrische Kontaktierung zur Betätigung des Brennstoffeinspritzventils 1.A fuel injector 1 is designed in the form of a direct injection fuel injector 1, which is installed in a valve seat 20 of a cylinder head 2 for the direct injection of fuel into a combustion chamber of a mixture compression-ignition internal combustion engine, not shown, in particular. The valve receptacles 20 can also be provided on an ähmestutzen a suction pipe, not shown. The fuel injection valve 1 has at an inlet end 3 a plug connection to a receiving connector of a fuel distributor line 4, which is sealed by a seal 5 between the fuel distributor line 4 and a supply connector 6 of the fuel injector 1. The fuel injector 1 has an electrical connection 7 for the electrical contacting for actuating the fuel injector 1.
Um das Brennstoffeinspritzventil 1 in der Aufnahmebohrung 20 des Zylinderkopfes 2 zu fixieren, ist erfindungsgemäß eineIn order to fix the fuel injection valve 1 in the receiving bore 20 of the cylinder head 2, one is according to the invention
•Befestigungsvorrichtung 10 vorgesehen. Die • Fastening device 10 is provided. The
Befestigungsvorrichtung 10 besteht aus einer FederklammerFastening device 10 consists of a spring clip
11, welche sich einerseits an einer Schulter 12 der11, which is on the one hand on a shoulder 12 of the
Brennstoffverteilerleitung 4 und andererseits an einer Schulter 13 des Brennstoffeinspritzventils 1 abstützt. DieFuel distribution line 4 and on the other hand is supported on a shoulder 13 of the fuel injection valve 1. The
Federklammer 11 ist vorzugsweise aus Federstahlblech ausgestanzt. Ebenfalls durch Stanzen werden zweiSpring clip 11 is preferably punched out of spring steel sheet. Also by punching two
Federlaschen 14 hergestellt, die in Verbindung mit derSpring tabs 14 made in conjunction with the
Federklammer 11 stehen und federnd Verspannung an der Schulter 12 der Brennstoffverteilerleitung 4 anliegen. Eine detaillierte Darstellung der Federklammer 11 ist denStand spring clip 11 and resilient tension on the shoulder 12 of the fuel rail 4. A detailed representation of the spring clip 11 is the
Ansichten in den Fig. 2 und 3A bis 3D und der nachfolgendenViews in FIGS. 2 and 3A to 3D and the following
Beschreibung zu entnehmen. Zur Wahrung der Übersichtlichkeit ist in Fig. 1 nur die rechte Seite der Federklammer 11 dargestellt. Die Federklammer kann im Bereich des elektrischen Anschlusses 7 des Brennstoffeinspritzventils 1 geschlitzt ausgebildet sein, um die .Montage zu erleichtern. Aufgrund der aus Federstahlblech bestehenden Federklammer 11 hat die geschlitzte Form keine Auswirkung auf die Zuverlässigkeit der Befestigungsvorrichtung 10.See description. To maintain clarity, only the right side of the spring clip 11 is shown in FIG. 1. The spring clip can be slotted in the area of the electrical connection 7 of the fuel injection valve 1 in order to facilitate the .assembly. Due to the spring clip 11 made of spring steel sheet, the slotted shape has no effect on the reliability of the fastening device 10.
Vorzugsweise kann die Federklammer 11 Vorsprünge 15 aufweisen, die in dem dem Brennstoffeinspritzventil 1 zugewandten Bereich der Federklammer 11 ausgebildet sind. Die Vorsprünge 15 sind dabei leicht nach innen und an ihren Enden wiederum leicht nach außen gebogen. Dies erleichtert einerseits das Aufschieben der Federklammer 11 auf das Brennstof einspritzventil 1 und sorgt andererseits für einen sicheren Halt der Federklammer 11 auf dem Brennstoffeinspritzventil 1.The spring clip 11 can preferably have projections 15 which are formed in the area of the spring clip 11 facing the fuel injector 1. The projections 15 are slightly bent inwards and in turn slightly bent outwards at their ends. On the one hand, this makes it easier to slide the spring clip 11 onto the fuel injection valve 1 and, on the other hand, ensures that the spring clip 11 is held securely on the fuel injection valve 1.
Fig. 2 zeigt eine schematische, perspektivische Ansicht der Federklammer 11 in nicht montiertem Zustand. Wie bereits weiter oben erwähnt, ist die Federklammer 11 durch Stanzen aus Federstahl herstellbar. Sie wird einschließlich der Federlaschen 14 aus einem Stück gestanzt und dann in ihre vorgesehene Form gebogen. Die Federlaschen 14 sind dabei wellenförmig ausgebildet und nach innen umgeklappt, so daß sie, wie in Fig. 1 andeutungsweise erkennbar, die Schulter 12 der Brennstoffverteilerleitung 4 untergreifen. Durch die Form der Federlaschen 14 und ihre elastische Verbindung mit der Federklammer 11 wird das Brennstoffeinsprit zventil 1 gegenüber der Brennstoffverteilerleitung 4 verspannt .Fig. 2 shows a schematic, perspective view of the spring clip 11 in the unassembled state. As already mentioned above, the spring clip 11 can be produced by stamping from spring steel. It is punched out of one piece including the spring tabs 14 and then bent into its intended shape. The spring tabs 14 are wave-shaped and folded inwards so that, as can be seen in FIG. 1, they engage under the shoulder 12 of the fuel rail 4. Due to the shape of the spring tabs 14 and their elastic connection with the spring clip 11, the fuel injector zventil 1 is braced against the fuel rail 4.
Fig. 3A bis 3D stellen schematische Ansichten und Teilschnitte des in Fig. 1 und 2 dargestellten Ausführungsbeispiels einer erfindungsgemäß ausgestalteten Befestigungsvorrichtung 10 in nicht montiertem Zustand der Befestigungsvorrichtung 10 dar. Gleiche Bauteile sind in allen Figuren mit übereinstimmenden Bezugszeichen versehen. Fig. 3A zeigt eine Vorderansicht der erfindungsge äß ausgestaltete Befestigungsvorrichtung 10, Fig. 3B eine Seitenansicht, Fig. 3C eine Aufsicht von unten und Fig. 3D einen Teilschnitt durch die Federklammer 11 entlang -der Linie IIID-IIID in Fig. 3A.3A to 3D illustrate schematic views and partial sections of the exemplary embodiment of a fastening device 10 according to the invention shown in FIGS. 1 and 2 in the non-assembled state of the fastening device 10. The same components are provided with the same reference numerals in all figures. 3A shows a front view of the fastening device 10 designed according to the invention, FIG. 3B shows a side view, FIG. 3C shows a bottom view and FIG. 3D shows a partial section through the spring clip 11 along the line IIID-IIID in FIG. 3A.
Die bereits oben erwähnten Vorsprünge 15, welche nach innen gebogen für einen sicheren Sitz der Federklammer 11 am Brennstoffeinspritzventil 1 sorgen, sind insbesondere in Fig. 3C deutlich erkennbar. Zur Erleichterung des Aufsteckens der Federklammer 11 auf das Brennstoffeinspritzventil 1 sind die Vorsprünge 15 an ihren Ende fasenähnlich aufgebogen. Die Vorsprünge 15 können als weitere Befestigungsmaßnahme auch Hinterschnitte 17 in einer Kunststoffummantelung 18 des Brennstoffeinspritzventils 1 untergreifen.The projections 15 already mentioned above, which, when bent inwards, ensure that the spring clip 11 is securely seated on the fuel injection valve 1, can be seen particularly clearly in FIG. 3C. To make it easier to put the spring clip 11 onto the fuel injection valve 1, the projections 15 are bent out at their ends in a chamfer-like manner. As a further fastening measure, the projections 15 can also engage undercuts 17 in a plastic casing 18 of the fuel injector 1.
In den Fig. 3B und 3D sind insbesondere die wellenförmigen Federlaschen 14 deutlich . erkennbar. Die Form der Federlaschen 14' ermöglicht einerseits eine elastische Verspannung des Brennstoffeinspritzventils 1 gegen die Brennstoffverteilerleitung 4 und andererseits eine einfache Herstellung und Montage der Federklammer 11. Um einen zu großen Federweg zu vermeiden und zu gewährleisten, daß auch bei stärkerem Druck durch die Brennstoffverteilerleitung 4 auf die Federklammer 11 eine Federwirkung erhalten bleibt, sind Laschen 19 vorgesehen, welche den Ansatzpunkten der Federlaschen 14 gegenüberliegend in die Federklammer hineingebogen sind. Bei verstärktem Druck der Brennstoffverteilerleitung 4 auf die Federlaschen 14 setzen diese auf den Laschen 19 auf. Die Federwirkung bleibt durch die aufgewölbte Form der Federlaschen 14 jedoch erhalten.3B and 3D, the wavy spring tabs 14 are particularly clear. recognizable. The shape of the spring tabs 14 'on the one hand enables the fuel injection valve 1 to be braced against the fuel distributor line 4 and on the other hand simple manufacture and assembly of the spring clip 11. In order to avoid excessive spring travel and to ensure that the fuel distributor line 4 is also at greater pressure the spring clip 11 retains a spring action, tabs 19 are provided which are bent into the spring clip opposite the starting points of the spring tabs 14. With increased pressure of the fuel distributor line 4 on the spring tabs 14, these rest on the tabs 19. The spring effect is retained by the arched shape of the spring tabs 14.
Aus den Fig. 3B und 3D sind auch die Ausnehmungen 16, welche von der Schulter 12 der Brennstoffverteilerleitung 4 durchgriffen werden, gut erkennbar. Das Eingreifen der Brennstoffverteilerleitung 4' in die Ausnehmungen 16 stellt einerseits sicher, daß sich. das Brennstoffeinspritzventil 1 nicht im Zylinderkopf verdrehen kann, und andererseits, daß das Brennstoffeinspritzventil 1 im Bedarfsfall mit der3B and 3D, the recesses 16, which are penetrated by the shoulder 12 of the fuel distributor line 4, are also clearly visible. The intervention of the fuel distribution line 4 'in the recesses 16 ensures on the one hand that . the fuel injector 1 can not twist in the cylinder head, and on the other hand that the fuel injector 1 if necessary with the
Brennstoffverteilerleitung 4 als Gesamtbauteil amFuel distributor line 4 as an overall component on
Zylinderkopf 2 der Brennkraftmaschine montiert und demontiert werden kann.Cylinder head 2 of the internal combustion engine can be assembled and disassembled.
Durch die vorstehend beschriebene Form der erfindungsgemäßenDue to the form of the invention described above
Befestigungsvorrichtung 10 wird eine zuverlässigeFastening device 10 becomes a reliable one
Verspannung der Brennstoffverteilerleitung 4 und desBracing the fuel rail 4 and the
Brennstoffeinspritzventils 1 sowie eine sichere Positionierung ohne Verdrehen im Zylinderkopf 2 erzielt. Durch die federnde Form der Federklammer 11 und der Federlaschen 14 kann sichergestellt werden, daß die Federklammer 11 sowohl am Brennstoffeinspritzventil 1 als auch an der Brennstoffverteilerleitung 4 anliegt und dadurch eine zentrierende Wirkung ausübt. Dadurch können auch Biegekräfte auf das Brennstoffeinspritzventil 1, welche zu Versätzen der Ventilnadel bis hin zum Verklemmen führen können, ' vermieden werden.Fuel injector 1 and a secure positioning without twisting in the cylinder head 2 achieved. The resilient shape of the spring clip 11 and the spring tabs 14 can ensure that the spring clip 11 bears against both the fuel injector 1 and the fuel distributor line 4 and thereby exerts a centering effect. This also bending forces on the fuel injector 1, which can lead to misalignments of the valve needle up to the jamming can 'be avoided.
Zudem können durch die federnde Verspannung der Bauteile gegeneinander Fertigungstoleranzen und Längenänderungen durch Erwärmung beim Betrieb der Brennkraftmaschine ausgeglichen werden.In addition, the resilient bracing of the components against one another can compensate for manufacturing tolerances and changes in length due to heating during operation of the internal combustion engine.
Die Erfindung ist nicht auf das dargestellteThe invention is not based on the illustrated
Ausführungsbeispiel beschränkt und beispielsweise auch fürEmbodiment limited and for example also for
' Brennstoffeinspritzventile 1 zur Einspritzung in den ' Fuel injection valves 1 for injection into the
Brennraum einer selbstzündenden Brennkraftmaschine anwendbar . Combustion chamber of a self-igniting internal combustion engine applicable.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001163030 DE10163030B4 (en) | 2001-12-20 | 2001-12-20 | fastening device |
| DE10163030.1 | 2001-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003054383A1 true WO2003054383A1 (en) | 2003-07-03 |
Family
ID=7710211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2002/004659 Ceased WO2003054383A1 (en) | 2001-12-20 | 2002-12-19 | Fixing device |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10163030B4 (en) |
| WO (1) | WO2003054383A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004051074A1 (en) * | 2002-12-04 | 2004-06-17 | Robert Bosch Gmbh | Supporting element |
| EP1544455A3 (en) * | 2003-12-16 | 2006-03-15 | Robert Bosch Gmbh | Fuel injector |
| EP1892408A1 (en) * | 2006-08-21 | 2008-02-27 | Siemens Aktiengesellschaft | Injector, fuel cup and holder |
| EP2077390A1 (en) * | 2008-01-07 | 2009-07-08 | Continental Automotive GmbH | Coupling arrangement and connection assembly |
| US7560835B2 (en) | 2004-11-16 | 2009-07-14 | Bosch Rexroth Ag | Electrical induction machine and primary part |
| WO2009144069A1 (en) * | 2008-05-30 | 2009-12-03 | Robert Bosch Gmbh | Hold-down member for a fuel injection device |
| CN103291517A (en) * | 2012-02-27 | 2013-09-11 | 株式会社京浜 | Fuel injection valve supporting structure |
| CN104564470A (en) * | 2013-10-10 | 2015-04-29 | 大陆汽车有限公司 | Fluid injection assembly for a combustion engine |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10239142A1 (en) * | 2002-08-27 | 2004-04-29 | Daimlerchrysler Ag | Fuel injection device for an internal combustion engine |
| DE10359299A1 (en) * | 2003-12-17 | 2005-08-25 | Robert Bosch Gmbh | support element |
| DE102004047035B4 (en) * | 2004-02-26 | 2017-02-09 | Robert Bosch Gmbh | support element |
| EP1721074A1 (en) | 2004-02-26 | 2006-11-15 | Robert Bosch Gmbh | Support element |
| DE102004048401A1 (en) * | 2004-10-01 | 2006-04-06 | Robert Bosch Gmbh | Downholder for a fuel injector and fuel injector |
| DE102007035714A1 (en) | 2007-07-30 | 2009-02-05 | Robert Bosch Gmbh | Fuel injection system with compensation element |
| EP2388469B1 (en) * | 2010-05-18 | 2013-03-13 | Continental Automotive GmbH | Fuel cup |
| JP5822271B2 (en) * | 2012-02-27 | 2015-11-24 | 株式会社ケーヒン | Support structure for fuel injection valve |
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| DE3428597A1 (en) * | 1984-08-02 | 1986-02-13 | Bayerische Motoren Werke AG, 8000 München | Connection of two pipe sections which are arranged coaxially one behind the other, especially of an injection nozzle to the coaxially arranged connecting stub of an injection line |
| DE2926490C2 (en) | 1979-06-30 | 1992-04-09 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
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| US4993390A (en) * | 1988-05-27 | 1991-02-19 | Mitsubishi Jidosha Kogyo Akbushiki Kaisha | Injector positioning device |
| DE4017875C2 (en) * | 1990-06-02 | 1999-02-04 | Bosch Gmbh Robert | Fuel injection device for internal combustion engines |
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- 2001-12-20 DE DE2001163030 patent/DE10163030B4/en not_active Expired - Fee Related
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| DE2926490C2 (en) | 1979-06-30 | 1992-04-09 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
| DE3428597A1 (en) * | 1984-08-02 | 1986-02-13 | Bayerische Motoren Werke AG, 8000 München | Connection of two pipe sections which are arranged coaxially one behind the other, especially of an injection nozzle to the coaxially arranged connecting stub of an injection line |
| US5803052A (en) * | 1997-06-27 | 1998-09-08 | Siemens Automotive Corporation | Spring clip for retaining a fuel injector in a fuel rail cup |
| US6148797A (en) * | 1997-12-17 | 2000-11-21 | Robert Bosch Gmbh | Mounting device for mounting fuel injection valves |
| US5970953A (en) * | 1999-01-12 | 1999-10-26 | Siemens Automotive Corporation | High pressure injector clip |
| DE19937444C1 (en) * | 1999-08-07 | 2001-01-18 | Winkelmann & Pannhoff Gmbh | Fuel distribution device for i.c. engine fuel injection system has fuel injection valves fitted directly to fuel distribution line via connection elements fitted to fuel distribution openings along fuel distribution line |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004051074A1 (en) * | 2002-12-04 | 2004-06-17 | Robert Bosch Gmbh | Supporting element |
| US7540273B2 (en) | 2002-12-04 | 2009-06-02 | Robert Bosch Gmbh | Supporting element |
| KR101032261B1 (en) | 2002-12-04 | 2011-05-06 | 로베르트 보쉬 게엠베하 | Support element |
| EP1544455A3 (en) * | 2003-12-16 | 2006-03-15 | Robert Bosch Gmbh | Fuel injector |
| US7560835B2 (en) | 2004-11-16 | 2009-07-14 | Bosch Rexroth Ag | Electrical induction machine and primary part |
| EP1892408A1 (en) * | 2006-08-21 | 2008-02-27 | Siemens Aktiengesellschaft | Injector, fuel cup and holder |
| EP2077390A1 (en) * | 2008-01-07 | 2009-07-08 | Continental Automotive GmbH | Coupling arrangement and connection assembly |
| US8398328B2 (en) | 2008-01-07 | 2013-03-19 | Continental Automotive Gmbh | Coupling arrangement and connection assembly |
| JP2011522147A (en) * | 2008-05-30 | 2011-07-28 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Fixture for fuel injector |
| WO2009144069A1 (en) * | 2008-05-30 | 2009-12-03 | Robert Bosch Gmbh | Hold-down member for a fuel injection device |
| CN102046958B (en) * | 2008-05-30 | 2013-08-21 | 罗伯特·博世有限公司 | Hold-down member for a fuel injection device |
| US8707930B2 (en) | 2008-05-30 | 2014-04-29 | Robert Bosch Gmbh | Hold-down device for a fuel injection device |
| CN103291517A (en) * | 2012-02-27 | 2013-09-11 | 株式会社京浜 | Fuel injection valve supporting structure |
| CN103291517B (en) * | 2012-02-27 | 2015-09-09 | 株式会社京浜 | The supporting structure of Fuelinjection nozzle |
| US9212641B2 (en) | 2012-02-27 | 2015-12-15 | Keihin Corporation | Fuel injection valve supporting structure |
| CN104564470A (en) * | 2013-10-10 | 2015-04-29 | 大陆汽车有限公司 | Fluid injection assembly for a combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10163030A1 (en) | 2003-07-03 |
| DE10163030B4 (en) | 2014-10-09 |
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