EP1364120A1 - Hold-down metal plate for securing a fuel injection valve - Google Patents

Hold-down metal plate for securing a fuel injection valve

Info

Publication number
EP1364120A1
EP1364120A1 EP02719633A EP02719633A EP1364120A1 EP 1364120 A1 EP1364120 A1 EP 1364120A1 EP 02719633 A EP02719633 A EP 02719633A EP 02719633 A EP02719633 A EP 02719633A EP 1364120 A1 EP1364120 A1 EP 1364120A1
Authority
EP
European Patent Office
Prior art keywords
hold
down plate
injection valve
receiving opening
fuel injection
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.)
Granted
Application number
EP02719633A
Other languages
German (de)
French (fr)
Other versions
EP1364120B1 (en
Inventor
Juergen Krome
Ferdinand Reiter
Jens Pohlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1364120A1 publication Critical patent/EP1364120A1/en
Application granted granted Critical
Publication of EP1364120B1 publication Critical patent/EP1364120B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Definitions

  • the invention relates to a hold-down plate for fastening a fuel injection valve according to the preamble of the main claim.
  • Directly injecting internal combustion engines usually accommodate a fuel injector. a receiving bore in a cylinder head, in which a pressure shoulder is formed, against which the fuel injector is pressed with a clamping claw or a hold-down plate.
  • a clamping claw is known for example from JP-OS 08-31 25 03.
  • the hold-down plate according to the invention with the characterizing feature of the main claim has the advantage that a symmetrical introduction of force into the fuel injector takes place through the bent fork ends.
  • the force is applied along a support line, which is formed symmetrically with respect to the longitudinal axis of the fuel injector.
  • the linear support areas of the curved fork ends lie on a common straight line, so that the orientation of the hold-down plate with respect to a symmetrically designed fuel injector is arbitrary.
  • a slot which starts from the receiving opening it is possible to produce two bending beams which are formed independently of one another and whose elasticity determines the contact force on the contact area.
  • the slot asymmetrically it is also possible to influence the spring constant of the respective bending beam in accordance with the length of the bending beam up to the bearing area in such a way that an equally large force is transmitted to the fuel injection valve at the bearing area. This can prevent the introduction of transverse forces into the valve.
  • the spring-elastic fork ends enable axial length compensation for the fuel injector. This means that tolerances caused by production can be compensated for, as can the linear expansion due to the temperature differences that occur during operation.
  • FIG. 1 is a plan view of an inventive
  • FIG. 2 shows a side view of the hold-down plate according to the invention from FIG. 1.
  • the hold-down plate 1 shows a hold-down plate 1 according to the invention in a plan view.
  • the hold-down plate 1 essentially has an elongated basic geometry, the two narrow sides being rounded in a semicircle. At one end, the hold-down plate 1 has a fastening bore 2, the center Ml of which is identical to the center of the semicircular rounding.
  • the mounting hole 2 serves to receive a fastener, for example a screw, which is screwed into the cylinder head, not shown, and fixes the hold-down plate 1.
  • a receiving opening 3 is made in the hold-down plate 1, the center M2 of which is also arranged on the longitudinal axis 8 of the hold-down plate 1.
  • the receiving opening 3 has an insertion recess 4, the center line 5 of which runs through the center M2 of the receiving opening 3.
  • the center line 5 of the insertion recess 4 includes with the longitudinal axis 8 of the holding-down plate 1 an insertion angle which differs from zero.
  • the insertion angle ⁇ is determined by the space available on the respective internal combustion engine.
  • the end of the hold-down plate 1 on the fuel valve side is split in a fork shape and forms a first fork end 6 and a second fork end 7.
  • the first and second fork ends 6 and 7 have a different length, their ratio of the width of the insertion recess 4 and the position of the center line 5 of the
  • Insertion recess 4 depends.
  • the first and second fork ends 6 and 7 are bent so that each Au layer line is formed, which have a common connecting line 12, which runs through the center M2 of the receiving opening 3 and preferably forms a right angle with the center line S of the insertion recess 4.
  • the center M2 of the receiving opening 3 coincides with the longitudinal axis of the fuel injector, not shown, which extends into the plane of the drawing.
  • the formation of the curved fork ends 6 and 7 is shown below with reference to
  • a slot 9 is made in the hold-down plate 1, starting from the receiving opening 3 e.g. is arranged parallel to the longitudinal axis 8 of the hold-down plate 1.
  • the slot 9 divides the hold-down plate 1 into a first bending beam 10 and a second bending beam 11.
  • the spring characteristics of the first and second bending beams 10 and 11 are determined by the distance of the slot 9 from the longitudinal axis 8 of the holding-down plate 1 and the width of the slot 9 and its length.
  • the spring characteristics of the first bending beam 10 and the second bending beam 11 are set so that the force introduced by the first fork end 6 and the second fork end 7 into the fuel injector are the same. It is thus possible to compensate for the influence of the bending lengths of the first and second fork ends 6 and 7 of different lengths.
  • the hold-down plate 1 is shown in a side view in FIG. 2.
  • the two fork ends 6 and 7 are preferably formed together so that> they have identical profile, which is to be explained using the second fork end 7.
  • the shape of the two fork ends 6 and 7 is described by three radii. Starting from the side of a flat section 15, with which the holding-down plate 1 is fastened to a fastening surface of the cylinder head, the fork end 7 is bent with a first radius R1 in the direction of the valve side 17 of the holding-down plate 1.
  • the second fork end 7 is bent with the radius R2 in the opposite direction and ends after a radius R3 which is oriented in the same direction as the first radius Rl, for example again at the level of the flat section 15 thus a flat surface.
  • a radius R3 which is oriented in the same direction as the first radius Rl, for example again at the level of the flat section 15 thus a flat surface.
  • At least the radius Rl and the third radius R3 are preferably the same and the bending lines of the three radii Rl to R3 run parallel to one another.
  • the two bearing areas 13 and 14 are formed on the valve side 17 of the second radius R2.
  • first fork end 6 and the second fork end 7 are formed together, it automatically results that the first support area 13 and the second support area 14 are arranged on a common straight line 12.
  • the connecting line 12 is parallel to the valve side 17 of the hold-down plate 1.
  • the support areas 13, 14 of the fork ends 6, 7 can be oriented such that they are neither parallel nor at right angles to the longitudinal axis 8 of the hold-down plate 1.
  • the fork ends 6, 7 can be designed asymmetrically.
  • the hold-down plate 1 can be designed, for example, inexpensively as a stamped and bent part.
  • the spring-elastic fork ends 6 and 7 enable axial tolerance compensation of the fuel injector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A hold-down metal plate for securing a fuel injection valve in a receiving opening of a cylinder head of a mixture- compressing internal combustion engine, comprising a fixing hole (2) which is penetrated by a fixing element which fixes the hold-down metal plate (1) to the cylinder head and on whose opposite end of the hold-down metal plate (1) a receiving opening (3) for receiving a fuel injection valve is disposed, said receiving opening (3) being divided by an introducing recess and being defined by a first and second fork end (6, 7) exerting a force upon the fuel injection valve, pressing the fuel injection valve against a pressure shoulder in the receiving opening of the cylinder head. The first and second fork end (6, 7) respectively have an undulated curvature, when seen from a cross-sectional view, which is oriented towards the fuel injection valve, a respective radius (R2) of the undulated curvature forming a bearing surface (13, 14).

Description

Niederhalteblech zur Befestigung eines Brennstoffeinspritzventils Hold-down plate for fastening a fuel injector
Stand der TechnikState of the art
Die Erfindung geht aus von einem Niederhalteblech zur Befestigung eines Brennstoffeinspritzventils nach Gattung des Hauptanspruchs.The invention relates to a hold-down plate for fastening a fuel injection valve according to the preamble of the main claim.
Direkt einspritzende Brennkraftmaschinen v/eisen zur Aufnahme eines Brennstoffeinspritzventils gewöhnlich. eine Aufnahmebohrung in einem Zylinderkopf auf, in der eine Druckschulter ausgebildet ist, gegen die das Brennstoffeinspritzventil mit einer Spannpratze oder einem Niederhalteblech gedrückt wird. Eine solche Spannpratze ist beispielsweise aus der JP-OS 08-31 25 03 bekannt.Directly injecting internal combustion engines usually accommodate a fuel injector. a receiving bore in a cylinder head, in which a pressure shoulder is formed, against which the fuel injector is pressed with a clamping claw or a hold-down plate. Such a clamping claw is known for example from JP-OS 08-31 25 03.
Durch die fehlende Symmetrie der eingeleiteten Kraft treten in dem Brennstoffeinspritzventil Querkräfte auf, die zu Verspannungen führen, die Störungen beim Betrieb des Brennstoffeinspritzventils verursachen können, die bis zum Ausfall des Systems führen.Due to the lack of symmetry of the force introduced, transverse forces occur in the fuel injector, which lead to tension, which can cause malfunctions in the operation of the fuel injector, which lead to failure of the system.
Vorteile der ErfindungAdvantages of the invention
Demgegenüber hat das erfindungsgemäße Niederhalteblech mit dem kennzeichnenden Merkmal des Hauptanspruchs den Vorteil, daß durch die gebogenen Gabelenden eine symmetrische Krafteinleitung in das Brennstoffeinspritzventil erfolgt. Die Krafteinleitung erfolgt entlang einer Auflagelinie, welche symmetrisch bezüglich der Längsachse des Brennstoffeinspritzventils ausgebildet ist .In contrast, the hold-down plate according to the invention with the characterizing feature of the main claim has the advantage that a symmetrical introduction of force into the fuel injector takes place through the bent fork ends. The force is applied along a support line, which is formed symmetrically with respect to the longitudinal axis of the fuel injector.
Gemäß den in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des erfindungsgemäßen Niederhalteblechs möglich.According to the measures listed in the subclaims, advantageous developments of the hold-down plate according to the invention are possible.
Die linienförmigen Auflagebereiche der gebogenen Gabelenden liegen auf einer gemeinsamen Geraden, so daß die Orientierung des Niederhalteblechs bezüglich einem symmetrisch ausgebildeten Brennstoffeinspritzventil beliebig ist. Durch Einbringen eines Schlitzes, welcher von der Aufnahmeoffnung ausgeht, ist es möglich, zwei unabhängig voneinander ausgebildete Biegebalken zu erzeugen, deren Elastizität die Auflagekraft an dem Auflagebereich bestimmt. Durch asymmetrisches Einbringen des Schlitzes ist es weiterhin möglich, entsprechend der Länge der Biegebalken bis hin zu dem Auflagebereich die Federkonstante des jeweiligen Biegebalkens so zu beeinflussen, daß an dem Auflagebereich jeweils eine gleich große Kraft auf das Brennstoffeinspritzventil übertragen wird. Dadurch kann die Einleitung von Querkräften in das Ventil verhindert werden. Die federelastischen Gabelenden ermöglichen einen axialen Längenausgleich für das Brennstoffeinspritzventil . Dadurch können Toleranzen, die durch die Fertigung entstehen, ebenso ausgeglichen werden, wie die Längenausdehnung durch die im Betrieb auftretenden Temperaturdifferenzen.The linear support areas of the curved fork ends lie on a common straight line, so that the orientation of the hold-down plate with respect to a symmetrically designed fuel injector is arbitrary. By introducing a slot which starts from the receiving opening, it is possible to produce two bending beams which are formed independently of one another and whose elasticity determines the contact force on the contact area. By introducing the slot asymmetrically, it is also possible to influence the spring constant of the respective bending beam in accordance with the length of the bending beam up to the bearing area in such a way that an equally large force is transmitted to the fuel injection valve at the bearing area. This can prevent the introduction of transverse forces into the valve. The spring-elastic fork ends enable axial length compensation for the fuel injector. This means that tolerances caused by production can be compensated for, as can the linear expansion due to the temperature differences that occur during operation.
Zeichnungdrawing
Ein Aus f ührungsbeispiel eines erf indungsgemäßen Niedεrhalteblechs ist in der Zeichnung vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert . Es zeigen : Fig. 1 eine Draufsicht eines erfindungsgemäßenAn exemplary embodiment of a holding plate according to the invention is shown in simplified form in the drawing and is explained in more detail in the following description. Show it : Fig. 1 is a plan view of an inventive
Niederhalteblechs; undHold-down plate; and
Fig. 2 eine Seitenansicht des erfindungsgemäßen Niederhalteblechs aus Fig. 1.FIG. 2 shows a side view of the hold-down plate according to the invention from FIG. 1.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In Fig. 1 ist ein erfindungsgemäßes Niederhalteblech 1 in einer Draufsicht dargestellt. Das Niederhalteblech 1 weist im wesentlichen eine längliche Grundgeometrie auf, wobei die beiden Schmalseiten halbkreisförmig abgerundet sind. An einem Ende weist das Niederhalteblech 1 eine Befestigungsbohrung 2 auf, deren Mittelpunkt Ml mit dem Mittelpunkt der halbkreisförmigen Abrundung identisch ist. Die Befestigungsbohrung 2 dient zur Aufnahme eines Befestigungsmittels, beispielsweise einer Schraube, welche in den nicht dargestellten Zylinderkopf geschraubt wird und das Niederhalteblech 1 fixiert.1 shows a hold-down plate 1 according to the invention in a plan view. The hold-down plate 1 essentially has an elongated basic geometry, the two narrow sides being rounded in a semicircle. At one end, the hold-down plate 1 has a fastening bore 2, the center Ml of which is identical to the center of the semicircular rounding. The mounting hole 2 serves to receive a fastener, for example a screw, which is screwed into the cylinder head, not shown, and fixes the hold-down plate 1.
An dem gegenüberliegenden Ende des Niederhalteblechs 1 ist eine Aufnahmeoffnung 3 in das Niederhalteblech 1 eingebracht, deren Mittelpunkt M2 ebenfalls auf der Längsachse 8 des Niederhalteblechs 1 angeordnet ist . Zur Vereinfachung der Montage weist die Aufnahmeoffnung 3 eine Einführausnehmung 4 auf, deren Mittellinie 5 durch den Mittelpunkt M2 der Aufnahmeoffnung 3 verläuft. Die Mittellinie 5 der Einführausnehmung 4 schließt mit der Längsachse 8 des Niederhalteblechs 1 einen von Null verschiedenen Einführwinkel ein. Durch die Einführausnehmung 4 ist das Anbringen des Niederhalteblechs 1 auch bei montierter Brennstoffleitung möglich. Der Einführwinkel α wird dabei durch die Platzverhältnisse an der jeweiligen Brennkraftmaschine bestimmt.At the opposite end of the hold-down plate 1, a receiving opening 3 is made in the hold-down plate 1, the center M2 of which is also arranged on the longitudinal axis 8 of the hold-down plate 1. To simplify assembly, the receiving opening 3 has an insertion recess 4, the center line 5 of which runs through the center M2 of the receiving opening 3. The center line 5 of the insertion recess 4 includes with the longitudinal axis 8 of the holding-down plate 1 an insertion angle which differs from zero. Through the insertion recess 4, the holding-down plate 1 can also be attached when the fuel line is installed. The insertion angle α is determined by the space available on the respective internal combustion engine.
Entsprechend der Lage • der Mittellinie 5 der Einführausnehmung 4 wird das brennstoffventilseitige Ende des Niederhalteblechs 1 gabelförmig geteilt und bildet ein erstes Gabelende 6 und ein zweites Gabelende 7 aus. Das erste und zweite Gabelende 6 und 7 weisen eine unterschiedliche Länge auf, deren Verhältnis von der Breite der Einführausnehmung 4 sowie der Lage der Mittellinie 5 derCorresponding to the position • of the center line 5 of the insertion recess 4, the end of the hold-down plate 1 on the fuel valve side is split in a fork shape and forms a first fork end 6 and a second fork end 7. The first and second fork ends 6 and 7 have a different length, their ratio of the width of the insertion recess 4 and the position of the center line 5 of the
Einführausnehmung 4 abhängt. Das erste und zweite Gabelende 6 und 7 sind so gebogen, daß jeweils eine Au lagelinie entsteht, die eine gemeinsame Verbindungslinie 12 aufweisen, die durch den Mittelpunkt M2 der Aufnahmeoffnung 3 verläuft und vorzugsweise einen rechten Winkel mit der Mittellinie S der Einführausnehmung 4 bildet. Der Mittelpunkt M2 der Aufnahmeoffnung 3 fällt dabei mit der Längsachse des nicht dargestellten Brennstoffeinspritzventils zusammen, das sich in die Zeichenebene hineinerstreckt. Die Ausbildung der gebogenen Gabelenden 6 und 7 wird nachstehend anhand vonInsertion recess 4 depends. The first and second fork ends 6 and 7 are bent so that each Au layer line is formed, which have a common connecting line 12, which runs through the center M2 of the receiving opening 3 and preferably forms a right angle with the center line S of the insertion recess 4. The center M2 of the receiving opening 3 coincides with the longitudinal axis of the fuel injector, not shown, which extends into the plane of the drawing. The formation of the curved fork ends 6 and 7 is shown below with reference to
Fig. 2 beschrieben.Fig. 2 described.
Um Verspannungen des Brennstoffeinspritzventils zu vermeiden, ist es erforderlich, für eine gleich große Anpresskraft durch die beiden Gabelenden 6 und 7 zu sorgen. Hierzu ist in das Niederhalteblech 1 ein Schlitz 9 eingebracht, der von der Aufnahmeoffnung 3 ausgehend z.B. parallel zu der Längsachse 8 des Niederhalteblechs 1 angeordnet ist. Der Schlitz 9 teilt dabei das Niederhalteblech 1 in einen ersten Biegebalken 10 und einen zweiten Biegebalken 11. Die Federkennlinien des ersten und des zweiten Biegebalkens 10 und 11 werden durch den Abstand des Schlitzes 9 von der Längsachse 8 des Niederhalteblechs 1 sowie der Breite des Schlitzes 9 und seiner Länge bestimmt. Dabei werden die Federkennwerte des ersten Biegebalkens 10 und des zweiten Biegebalkens 11 so eingestellt, daß die durch das erste Gabelende 6 sowie das zweite Gabel ende 7 in das Brennstoffeinspritzventil eingeleitete Kraft gleich groß sind. Damit ist es möglich, den Einfluß der unterschiedlich langen Biegelängen des ersten und des zweiten Gabelendes 6 und 7 zu kompensieren.In order to avoid tension in the fuel injector, it is necessary to ensure that the two fork ends 6 and 7 have the same pressing force. For this purpose, a slot 9 is made in the hold-down plate 1, starting from the receiving opening 3 e.g. is arranged parallel to the longitudinal axis 8 of the hold-down plate 1. The slot 9 divides the hold-down plate 1 into a first bending beam 10 and a second bending beam 11. The spring characteristics of the first and second bending beams 10 and 11 are determined by the distance of the slot 9 from the longitudinal axis 8 of the holding-down plate 1 and the width of the slot 9 and its length. The spring characteristics of the first bending beam 10 and the second bending beam 11 are set so that the force introduced by the first fork end 6 and the second fork end 7 into the fuel injector are the same. It is thus possible to compensate for the influence of the bending lengths of the first and second fork ends 6 and 7 of different lengths.
Zur Verdeutlichung des Biegeprofils der gebogenen Gabelenden 6 und 7 ist in Fig. 2 das Niederhalteblech 1 in einer Seitenansicht dargestellt. Die beiden Gabelenden 6 und 7 werden vorzugsweise gemeinsam umgeformt, so daß> sie ein identisches Profil aufweisen, welches anhand des zweiten Gabelendes 7 erläutert werden soll. Die Form der beiden Gabelenden 6 und 7 wird durch drei Radien beschrieben. Von Seiten eines ebenen Abschnitts 15 ausgehend, mit welchem das Niederhalteblech 1 an einer Befestigungsfläche des Zylinderkopfs befestigt ist, ist das Gabelende 7 mit einem ersten Radius Rl in Richtung der Ventilseite 17 des Niederhalteblechs 1 gebogen. Im Anschluß wird das zweite Gabelende 7 mit dem Radius R2 in die entgegengesetzte Richtung gebogen und endet nach einem Radius R3 , der gleichsinnig mit dem ersten Radius Rl orientiert ist, z.B. wieder auf dem Niveau des ebenen Abschnitts 15. Auf der ventilabgewandten Seite 16 ergibt sich somit eine ebene Fläche. Zumindest der Radius Rl und der dritte Radius R3 sind vorzugsweise gleich und die Biegelinien der drei Radien Rl bis R3 verlaufen parallel zueinander. Auf der Ventilseite 17 des zweiten Radius R2 werden die beiden Auflagebereiche 13 und 14 ausgebildet.To clarify the bending profile of the bent fork ends 6 and 7, the hold-down plate 1 is shown in a side view in FIG. 2. The two fork ends 6 and 7 are preferably formed together so that> they have identical profile, which is to be explained using the second fork end 7. The shape of the two fork ends 6 and 7 is described by three radii. Starting from the side of a flat section 15, with which the holding-down plate 1 is fastened to a fastening surface of the cylinder head, the fork end 7 is bent with a first radius R1 in the direction of the valve side 17 of the holding-down plate 1. Subsequently, the second fork end 7 is bent with the radius R2 in the opposite direction and ends after a radius R3 which is oriented in the same direction as the first radius Rl, for example again at the level of the flat section 15 thus a flat surface. At least the radius Rl and the third radius R3 are preferably the same and the bending lines of the three radii Rl to R3 run parallel to one another. The two bearing areas 13 and 14 are formed on the valve side 17 of the second radius R2.
Werden das erste Gabelende 6 und das zweite Gabelende 7 gemeinsam umgeformt, so ergibt sich automatisch, daß der erste Auflagebereich 13 und der zweite Auflagebereich 14 auf einer gemeinsamen Geraden 12 angeordnet sind. Die Verbindungsgerade 12 ist dabei parallel zu der Ventilseite 17 des Niederhalteblechs 1. Die Auflagebereiche 13, 14 der Gabelenden 6, 7 können derart orientiert sein, daß sie weder parallel noch im rechten Winkel zu der Längsachse 8 des Niederhaiteblechs 1 verlaufen. Die Gabelenden 6, 7 können asymmetrisch ausgebildet sein.If the first fork end 6 and the second fork end 7 are formed together, it automatically results that the first support area 13 and the second support area 14 are arranged on a common straight line 12. The connecting line 12 is parallel to the valve side 17 of the hold-down plate 1. The support areas 13, 14 of the fork ends 6, 7 can be oriented such that they are neither parallel nor at right angles to the longitudinal axis 8 of the hold-down plate 1. The fork ends 6, 7 can be designed asymmetrically.
Das Niederhalteblech 1 kann beispielsweise kostengünstig als Stanzbiegeteil ausgeführt werden. Durch die federelastischen Gabelenden 6 und 7 ist ein axialer Toleranzausgleich des Brennstoffeinspritzventils möglich. The hold-down plate 1 can be designed, for example, inexpensively as a stamped and bent part. The spring-elastic fork ends 6 and 7 enable axial tolerance compensation of the fuel injector.

Claims

Ansprüche Expectations
1. Niederhalteblech zur Befestigung eines Brennstoffeinspritzventils in einer Aufnahmeoffnung eines Zylinderkopfs einer gemischverdichtenden Brennkraftmaschine, wobei das Niederhalteblech (1) an einem Ende eine Befestigungsbohrung (2) aufweist, die von einem Befestigungselement durchdrungen wird, das . das Niederhalteblech (1) an dem Zylinderkopf befestigt, und das entgegengesetzte Ende des Niedεrhalteblechs (1) eine Aufnahmeoffnung (3) zur Aufnahme eines Brennstoffeinspritzventils aufweist, wobei die Aufnahmeoffnung (3) von einer Einführausnehmung (4) geteilt ist und durch ein erstes und ein zweites Gabelende (6, 7) begrenzt ist, die auf das Brennstoffeinspritzventil eine Kraft ausüben, die das Brennstoffeinspritzventil gegen eine Druckschulter in der Aufnahmebohrung des Zylinderkopfs drückt, und wobei das erste und das zweite Gabelende (6, 7) jeweils eine im Schnitt wellenförmige Biegung aufweisen, die zu dem Brennstoffeinspritzventil orientiert ist und jeweils ein Radius (R2) der wellenförmigen Biegung einen Auflagebereich (13, 14) ausbildet.1. hold-down plate for fastening a fuel injection valve in a receiving opening of a cylinder head of a mixture-compressing internal combustion engine, wherein the hold-down plate (1) has at one end a fastening hole (2) which is penetrated by a fastening element which. the hold-down plate (1) is fastened to the cylinder head, and the opposite end of the hold-down plate (1) has a receiving opening (3) for receiving a fuel injector, the receiving opening (3) being divided by an insertion recess (4) and by a first and a second fork end (6, 7) is limited, which exert a force on the fuel injector, which presses the fuel injector against a pressure shoulder in the receiving bore of the cylinder head, and wherein the first and the second fork end (6, 7) each have a wavy bend in section have, which is oriented to the fuel injection valve and each form a radius (R2) of the wave-shaped bend a support area (13, 14).
2. Niederhalteblech nach Anspruch 1, dadurch gekennzeichnet, daß der erste und zv/eite Auflagebereich (13, 14) der beiden Gabelenden (6, 7) auf einer gemeinsamen Verbindungsgeraden (12) angeordnet sind.2. hold-down plate according to claim 1, characterized in that the first and second / second support area (13, 14) of the two fork ends (6, 7) are arranged on a common connecting straight line (12).
3. Niederhalteblech nach Anspruch 2, dadurch gekennzeichnet, daß die Verbindungsgerade (12) einen Schnittpunkt mit der Längsachse des Brennstoffeinspritzventils aufweist.3. hold-down plate according to claim 2, characterized in that the connecting straight line (12) has an intersection with the longitudinal axis of the fuel injector.
4. Niederhalteblech nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Verbindungsgerade (12) senkrecht zur Flächennormale des Niederhalteblechs (1) ist.4. hold-down plate according to one of claims 2 or 3, characterized in that the connecting straight line (12) is perpendicular to the surface normal of the hold-down plate (1).
5. Niederhalteblech nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Auflagebereiche (13, 14) senkrecht zu einer Mittellinie (5) der Einführausnehmung (4) orientiert sind.5. hold-down plate according to one of claims 1 to 4, characterized in that the support areas (13, 14) are oriented perpendicular to a center line (5) of the insertion recess (4).
6. Niederhalteblech nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in das Niederhalteblech (1) ausgehend von der Aufnahmeoffnung (3) ein Schlitz (9) eingebracht ist, der bezüglich einer Längsachse (8) des Niederhalteblechs (1) nicht symmetrisch angeordnet ist und für jedes Gabelende (6, 7) jeweils einen Biegebalken (10, 11) ausbildet .6. hold-down plate according to one of claims 1 to 5, characterized in that in the hold-down plate (1) starting from the receiving opening (3), a slot (9) is introduced, which is not symmetrical with respect to a longitudinal axis (8) of the hold-down plate (1) is arranged and forms a bending beam (10, 11) for each fork end (6, 7).
7. Niederhalteblech nach Anspruch 6, dadurch gekennzeichnet, daß durch die Asymmetrie der Biegebalken (10, 11) die unterschiedlichen Biegelängen der Gabelenden (6, 7) so kompensierbar sind, daß die an den Auflagebereichen (13, 14) auf das Brennstoffeinspritzventil übertragene Kraft für beide Gabelenden (6, 7) identisch ist.7. hold-down plate according to claim 6, characterized in that the asymmetry of the bending beam (10, 11), the different bending lengths of the fork ends (6, 7) can be compensated so that the force at the bearing areas (13, 14) transmitted to the fuel injector is identical for both fork ends (6, 7).
8. Niederhalteblech nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß die Auflagebereiche (13, 14) der Gabelenden (6, 7) derart orientiert sind, daß sie weder parallel noch im rechten Winkel zu einer Längsachse (8) des Niederhalteblechs '(1) verlaufen.8. hold-down plate according to one of claims 2 to 7, characterized in that the support areas (13, 14) of the fork ends (6, 7) are oriented such that they run neither parallel nor at right angles to a longitudinal axis (8) of the holding-down plate (1).
9. Niederhalteblech nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, da die Gabelenden (6, 7) asymmetrisch ausgebildet sind. 9. hold-down plate according to one of the preceding claims, characterized in that the fork ends (6, 7) are asymmetrical.
EP02719633A 2001-02-21 2002-02-21 Hold-down metal plate for securing a fuel injection valve Expired - Lifetime EP1364120B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10108190A DE10108190A1 (en) 2001-02-21 2001-02-21 Hold-down plate for fastening a fuel injector
DE10108190 2001-02-21
PCT/DE2002/000643 WO2002066821A1 (en) 2001-02-21 2002-02-21 Hold-down metal plate for securing a fuel injection valve

Publications (2)

Publication Number Publication Date
EP1364120A1 true EP1364120A1 (en) 2003-11-26
EP1364120B1 EP1364120B1 (en) 2006-01-18

Family

ID=7674894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02719633A Expired - Lifetime EP1364120B1 (en) 2001-02-21 2002-02-21 Hold-down metal plate for securing a fuel injection valve

Country Status (6)

Country Link
US (1) US6769408B2 (en)
EP (1) EP1364120B1 (en)
JP (1) JP4092204B2 (en)
KR (1) KR100840521B1 (en)
DE (2) DE10108190A1 (en)
WO (1) WO2002066821A1 (en)

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FR2933751A3 (en) * 2008-07-09 2010-01-15 Renault Sas Injector fixing clamp for cylinder head of vee-form diesel engine of motor vehicle, has spherical support zone supporting clamp on cylinder head, where clamp is plane so as to be arranged on cylinder head via each of faces of clamp
WO2011011378A1 (en) * 2009-07-20 2011-01-27 Wayne State University Multi-sensing fuel injection system and method for making the same
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Also Published As

Publication number Publication date
KR20020086957A (en) 2002-11-20
US6769408B2 (en) 2004-08-03
JP4092204B2 (en) 2008-05-28
EP1364120B1 (en) 2006-01-18
WO2002066821A1 (en) 2002-08-29
KR100840521B1 (en) 2008-06-24
DE10108190A1 (en) 2002-08-29
DE50205650D1 (en) 2006-04-06
US20030154960A1 (en) 2003-08-21
JP2004518852A (en) 2004-06-24

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