EP1893867B1 - High-pressure accumulator space body having high-pressure restrictors - Google Patents

High-pressure accumulator space body having high-pressure restrictors Download PDF

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Publication number
EP1893867B1
EP1893867B1 EP06754873A EP06754873A EP1893867B1 EP 1893867 B1 EP1893867 B1 EP 1893867B1 EP 06754873 A EP06754873 A EP 06754873A EP 06754873 A EP06754873 A EP 06754873A EP 1893867 B1 EP1893867 B1 EP 1893867B1
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EP
European Patent Office
Prior art keywords
pressure
pressure accumulator
throttle
accumulator chamber
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP06754873A
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German (de)
French (fr)
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EP1893867A1 (en
Inventor
Markus Degn
Horst Rosenkranz
Peter Thurner
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1893867A1 publication Critical patent/EP1893867A1/en
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Expired - Fee Related legal-status Critical Current
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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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • the invention relates to a high-pressure storage space body with high-pressure throttles, in particular a high-pressure storage space body as used in high-pressure accumulator injection systems (common rail) in self-igniting internal combustion engines, according to the claims 1 and 5.
  • Out DE 10103 195 A1 is a fuel injector with a high-pressure accumulator known.
  • the high-pressure accumulator has a plurality of connecting holes, which serve the fuel discharge.
  • High-pressure supply lines leading to fuel injectors are connected to the connection bores.
  • the connection bores of these high pressure supply lines is assigned at least one throttle element, which has a single-stage throttle channel.
  • the throttle element is pressed as a Einpressdrosselelement in a wall of the high-pressure accumulator space, wherein the throttle element is held non-positively on at least one contact point.
  • a fuel injection device comprises a high-pressure fuel accumulator and a plurality of the fuel discharge from the high-pressure fuel storage branch pipes serving. These each have at one end a connection head for connecting the branch pipe with an associated connection piece of the high-pressure fuel storage, wherein in each of the branch pipes, a throttle is mounted.
  • the throttle is formed in a carrier element, which is fixed in the region of the connection head by fixing elements which are formed with the formation of the connection head and which constrict a clear width of the branch pipe on both sides of the carrier element.
  • the throttle is in the support member as a through hole with a first partial bore and a second partial bore, that is executed in two stages. The through hole is during the upsetting of the Terminal head secured by an inserted, stepped cylindrical êtorn, which is formed traceable.
  • the carrier element preferably has a cylindrical lateral surface.
  • a fuel injection device with a high-pressure fuel storage is known, to which branch pipes are screwed.
  • the branch pipes each include a throttle for reducing pressure pulsations in the fuel injector.
  • the throttles are each formed as a pipe piece, which is arranged at one end of the branch pipe, to which a connection head is attached, or inside the branch pipe near this end.
  • the high-pressure throttles serve to reduce pressure pulsations in the high-pressure reservoir chamber body and in the fuel injector.
  • a reduction in the pressure peaks of the pressure pulsations has a positive effect on the strength of the high-pressure reservoir chamber body as well as on the other hand has a positive effect on the high-pressure resistance of the fuel injector.
  • the solution proposed by the invention is based on the object of introducing a high-pressure throttle element into the wall of the high-pressure reservoir chamber body either through a radially extending connection bore or through the pressure chamber of the high-pressure reservoir.
  • the Einpressdrosselelement is proposed, which is produced either by way of deep drawing or extrusion molding.
  • the Einpressdrossel stresses which may have a one- or two-stage through-hole, are pressed by a pressing operation either in the provided in the wall of the high pressure accumulator space (common rail) connection holes for the high pressure line connections (high pressure fittings). It creates a positive connection, z. B. an interference fit that requires no further manufacturing technology aftertreatment and is particularly high pressure tight.
  • the press-fit throttle body is a thin-walled component having a throttle-opening at the bottom.
  • the deep-drawn component can also be pressed by means of a press-fit operation in the connection holes for the high pressure supply lines to the individual fuel injectors, whereby a non-positive connection, given by a press fit, is achieved.
  • EinpressdrosselSystem As an alternative to pressing the Einpressdrossel Congress in the radially extending connecting holes in the wall of the high-pressure reservoir (common rail) EinpressdrosselSystem made of plastic or spring steel by injection molding, stamping, bending or manufactured by means of Zerspantechnik from a round material and in the Cavity of the high pressure storage space body (common rail) are introduced.
  • the press-fit throttle body is made of resilient steel or plastic.
  • the press-fit throttle body can be introduced via the radially extending connection bore into the wall of the high-pressure reservoir chamber body (common rail).
  • the shape of the Einpressdrossel emotionss made of resilient steel or plastic corresponds approximately to a double cone, the narrowest Einschnürstelle forms the throttle cross-section.
  • the Einpressdrossel emotions of resilient steel or plastic material is supported both on the side of the connection hole, which opens into the high-pressure storage space, as well as from a z.
  • FIG. 1 The representation according to FIG. 1 is an example of a Einpresshrrosseliatas remove, which is not part of the invention.
  • FIG. 1 includes a high-pressure accumulator 10 made of metallic material, be it a laser-welded high-pressure reservoir 10 (LWR rail) or a forged high-pressure reservoir 10 (WFR, Warm Forged Rail), a wall 12 whose thickness is designed according to the system pressure.
  • a connecting piece 16 is attached to a contact surface 38, which preferably has a material fit with the lateral surface 14 in the area of the contact surface 38, such as, for example, FIG. B. is welded by means of the connecting piece 16, a high-pressure line 18 is fixed by means of a union nut 20 at the high pressure storage space 10.
  • the connecting piece 16 has an external thread 24 which cooperates with the internal thread of the union nut 20.
  • the high-pressure line 18 comprises a cross-section, which is identified by the reference numeral 22.
  • the high pressure line 18, with a in FIG. 1 not shown fuel injector is pressurized with fuel under system pressure or a high-pressure pump is connected to the high-pressure accumulator 10 is employed with its conical end 26 serving as a sealing cone 36 in the wall 12 of the high-pressure accumulator 10.
  • a Anstellbund 40 is provided above the conical end 26 of the high-pressure feed line 18. On the Anstellbund 40, an inner ring 42 of the union nut 20 is supported.
  • the conically shaped end 26 of the high-pressure feed line 18 is pressed into the formation 36 in the wall 12 of the high pressure accumulator 10 so that there is a pressure-tight connection between the conical end 26 of the high pressure line 18 and the wall 12 of the high-pressure accumulator 10.
  • connecting bores 30 are executed according to the number of under high pressure fuel to be supplied fuel injectors or connected high-pressure pump.
  • connection bores 30 are throttle body 28, which according to the in FIG. 1
  • high pressure supply line 18 of the throttle body 28 is pressed from round material into the connection bore 30.
  • the lateral surface 32 of the throttle body 28 thus forms a non-positive connection between the throttle body 28 and the wall 12 of the high pressure accumulator 10th
  • the throttle body 28 includes a through hole, which serves as a throttle passage 34.
  • FIG. 1.1 The representation according to Figure 1.1 is the manufacturable from round material, plastic or spring plate throttle body as shown in FIG FIG. 1 to be seen in an enlarged view.
  • the throttle body 28 made of round material has a through-bore which has a first diameter 44 and a second diameter 46.
  • the first diameter 44 lies on the side of the first end face 48 of the throttle body 28, whereas the second diameter 46 of the throttle channel 34 opens in a second end face 50 of the throttle body 28.
  • the respective diameters 44 and 46, in which the throttle channel 34 may be designed, may also be in other proportions than in Figure 1.1 shown extend within the throttle body 28.
  • the in Figure 1.1 illustrated throttle body 28 with two diameters 44 for the throttle passage 34 thus represents a stepped throttle, wherein the second diameter 46 of the throttle passage 34 opens into the flow cross section 22 of the high pressure line 18 connected above the throttle body 28.
  • the representation according to FIG. 2 is an embodiment of the present invention proposed Einpressdrossel refer.
  • the deep-drawn throttle body 52 as shown in FIG. 2 is pressed into the connection bore 30 and abuts with an upper support surface 56 in the region of the formation 36 in the wall 12 of the high pressure storage space 10.
  • the lateral surface extending below the support surface 56 bears against the inner wall of the connection bore 30.
  • the high pressure supply line (not shown) is connected according to this embodiment by means of a union nut 20 on the connector 16 (high pressure fitting).
  • Figure 2.1 shows the formed as a deep-drawn throttle body as shown in FIG FIG. 2 on an enlarged scale.
  • the deep-drawn throttle body 52 has a substantially cup-shaped appearance and is designed in a suitable for thermoforming, small wall thickness 54.
  • the throttle channel 34 In the bottom of the substantially cup-shaped, deep-drawn throttle body 52 is the throttle channel 34, which is designed according to this embodiment as a simple through hole.
  • the throttle channel 34 opposite side of the deep-drawn throttle body 52 is provided with a diameter extension.
  • the throttle channel 34 is in the mounted in the connection bore 30 state of the deep-drawn throttle body 52 still within the connection bore 30 and can, as shown in the embodiment of Figure 4, protrude into the cavity of the high-pressure accumulator 10, which is bounded by the wall 12.
  • FIG. 3 shows a further embodiment of the present invention proposed Einpressdrossel.
  • FIG. 3 In the illustration according to FIG. 3 is a cylinder-shaped throttle body 58 from an open end of the high-pressure accumulator chamber 10 in the cavity 68 axially inserted.
  • Reference numeral 76 denotes a dome-shaped elevation on the lateral surface of the cylinder-shaped throttle body 58, which snaps into the connecting bore 30 in the wall 12 of the high-pressure reservoir 10 in the mounted state of the cylindrical throttle body 58 and thus the axial position of the cylindrical throttle body 58 in the cavity 68 of the high pressure accumulator 10 defined.
  • In the assembled state is below each of the wall 12 of the high-pressure accumulator 10 traversing port bore 30 is a cylindrically shaped throttle body 58.
  • a throttle opening 72 is executed, via which the fuel for damping of pressure pulsations Cavity 68 into the connection bore 30 and from there into the on the lateral surface 14 of the high-pressure accumulator 10 connected high-pressure line 18 einschmannt.
  • the representation according to Figure 3.1 is an enlarged view of the cylinder-shaped throttle body according to FIG. 3 refer to.
  • the cylinder-shaped throttle body 58 has a lateral surface 64, which is provided in the axial direction with a longitudinal slot 60.
  • the longitudinal slots 60 in the lateral surface 64 of the cylindrical throttle body 58 delimiting ends are provided with fillets 62. Due to the longitudinal slot 60 in the circumferential surface 64 of the cylinder-shaped throttle body 58 of this is resilient and can be seen in the insertion direction 66 in the cavity 68 of the high-pressure accumulator chamber 10 as shown in FIG FIG. 3 mount in the axial direction.
  • the cylinder-shaped throttle body 58 is fixed in the axial direction in the cavity 68 of the high-pressure reservoir 10.
  • a corresponding number of cylinder-shaped throttle bodies 58 are introduced in the insertion direction 66 from an open end of a preferably laser-welded high-pressure reservoir 10.
  • the cylindrical throttle body 58 can be in the axial direction of insertion Insert 66 of an open end of the high-pressure accumulator 10 in this and then rotate in their corresponding radial position below the individual connection holes 30 so that the dome-shaped elevation 76 in the circumferential surface 64 of the cylinder-shaped throttle body 58 engages in the connection bore 30 and the cylinder-shaped throttle body 58th thus locked within the cavity 68 of the high-pressure storage space 10.
  • the representation according to FIG. 4 is to be taken as a Hyperboloid created Einpressdrossel Stress 80. From the illustration according to FIG. 4 It is apparent that the connecting piece 16 according to this embodiment is also joined cohesively to the lateral surface 14 of the wall 12 of the high-pressure storage space 10. The cohesive joining takes place z. B. by way of laser welding, whereby a high degree of automation in mass production can be achieved.
  • a funnel-shaped configuration 36 which serves as a sealing cone.
  • the serving as a sealing cone formation 36 in the wall 12 of the high-pressure accumulator 10 is in a made with a continuous diameter connection bore 30 on.
  • a trained as hyperboloid throttle body 80 is clamped. Trained as a hyperboloid throttle body 80 is supported on the one hand at a first contact point 84 within the formation 36 of the wall 12 of the high-pressure accumulator 10 and on the other hand frictionally held at a second contact point 86 at the discharge point of the connection bore 30 into the cavity 68 of the high-pressure accumulator. From the illustration according to FIG.
  • the throttle body 80 designed as a hyperboloid projects around a projection 90 into the cavity 68 of the high-pressure reservoir 10. Due to the projection 90 of the throttle body 80, the spring force, ie the holding force, generated at a second contact point 86 of the throttle body 80 in the connection bore 30.
  • the representation according to Figure 4.1 is formed as a hyperboloid throttle body as shown in FIG. 4 to be taken on an enlarged scale.
  • the throttle body 80 which is in the form of a hyperboloid, has a substantially double conical shape.
  • the throttle body 80 designed as a hyperboloid comprises a constriction site 82 which limits the flow cross section of the throttle passage 34 (see reference numeral 96 throttle cross section).
  • the throttle body 80 designed as a hyperboloid comprises a first opening 92, which is opposite the high-pressure line 18, and a second opening 94, which enters the cavity 68 of the high-pressure reservoir 10 as shown in FIG FIG. 4 empties.
  • the outer circumferential surface in the region of the first opening 92 forms the bearing surface 56, with which formed as a hyperboloid throttle body 80 is supported on the formation 36 in the wall 12 of the high-pressure accumulator space 10.
  • the portion of the hyperboloid-shaped throttle body 80 below the constriction site 82 has a plurality of axial slots 88, of which, according to FIG Figure 4.1 for illustrative reasons, only one is shown. Further axial slots 88 are in the plane of the drawing.
  • a high elasticity arises in the lower region of the throttle body 80 in the form of a hyperboloid so that the hyperboloidal throttle body 80 can simply be pushed into the connecting bore 30 in the radial direction and at the first contact point 84 and at the second contact point 86 (see illustration according to FIG. 4 ) enters into a frictional connection with the molding 36 and the inner wall of the connection bore 30.
  • the in Figure 4.1 illustrated, designed as hyperboloid throttle body 80 is preferably made of a thin-walled metallic material.
  • the throttle body 80 designed as a hyperboloid may also be made of plastic. In this case, however, it must be ensured that the plastic material is chosen such that it withstands the pressure prevailing in the cavity 68 of the high-pressure storage space 10.
  • the reduction of the pressure pulsations in the high-pressure reservoir 10 via the inventively proposed, designed as Einpressdrosseln throttle body 52, 58 and 80 is dependent on the selected flow cross-section of the throttle channel 34, be this as a hole in the bottom of the throttle element produced as a thermoforming element 52, this as a throttle opening 72 executed in the circumferential surface 64 of a cylinder-shaped throttle body 58 or as a constriction 82 in a hyperboloid designed as a throttle body 80, as in the FIGS. 4 or 4.1 shown in detail.

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

Description

Die Erfindung bezieht sich auf einen Hochdruckspeicherraumkörper mit Hochdruckdrosseln, insbesondere einen Hochdruckspeicherraumkörper wie er bei Hochdruckspeichereinspritzsystemen (Common Rail) in selbstzündenden Verbrennungskraftmaschinen eingesetzt wird, gemäß der Patentansprüche 1 und 5.The invention relates to a high-pressure storage space body with high-pressure throttles, in particular a high-pressure storage space body as used in high-pressure accumulator injection systems (common rail) in self-igniting internal combustion engines, according to the claims 1 and 5.

Stand der TechnikState of the art

Aus DE 10103 195 A1 ist eine Kraftstoffeinspritzeinrichtung mit einem Hochdruckspeicherraum bekannt. Der Hochdruckspeicherraum weist mehrere Anschlußbohrungen auf, die der Kraftstoffabfuhr dienen. An den Anschlußbohrungen sind Hochdruckzuleitungen angeschlossen, die zu Kraftstoffinjektoren führen. Den Anschlußbohrungen dieser Hochdruckzuleitungen ist mindestens ein Drosselelement zugeordnet, das einen einstufig ausgeführten Drosselkanal aufweist. Das Drosselelement ist als ein Einpressdrosselelement in eine Wand des Hochdruckspeicherraums eingepresst, wobei das Drosselelement an mindestens einer Kontaktstelle kraftschlüssig gehalten ist.Out DE 10103 195 A1 is a fuel injector with a high-pressure accumulator known. The high-pressure accumulator has a plurality of connecting holes, which serve the fuel discharge. High-pressure supply lines leading to fuel injectors are connected to the connection bores. The connection bores of these high pressure supply lines is assigned at least one throttle element, which has a single-stage throttle channel. The throttle element is pressed as a Einpressdrosselelement in a wall of the high-pressure accumulator space, wherein the throttle element is held non-positively on at least one contact point.

DE 20 2004 019 820.7 bezieht sich auf eine Kraftstoffeinspritzeinrichtung für einen Dieselmotor. Eine Kraftstoffeinspritzeinrichtung umfasst einen Kraftstoffhochdruckspeicher und mehrere der Kraftstoffabfuhr aus dem Kraftstoffhochdruckspeicher dienende Abzweigrohre. Diese weisen jeweils an ihrem einen Ende einen Anschlusskopf zur Verbindung des Abzweigrohres mit einem zugeordneten Anschlussstutzen des Kraftstoffhochdruckspeichers auf, wobei in jedem der Abzweigrohre eine Drossel angebracht ist. Die Drossel ist in einem Trägerelement ausgebildet, welches durch Fixierelemente, die mit der Ausbildung des Anschlusskopfes herausgebildet werden und die eine lichte Weite des Abzweigrohres beiderseits des Trägerelementes einengen, im Bereich des Anschlusskopfes fixiert. Die Drossel ist in dem Trägerelement als eine Durchgangsbohrung mit einer ersten Teilbohrung und einer zweiten Teilbohrung, d. h. zweistufig ausgeführt. Die Durchgangsbohrung ist während des Anstauchens des Anschlusskopfes durch einen eingefügten, gestuft zylindrischen lnnendorn, der rückführbar ausgebildet ist, gesichert. Das Trägerelement weist bevorzugt eine zylindrische Mantelfläche auf. DE 20 2004 019 820.7 refers to a fuel injector for a diesel engine. A fuel injection device comprises a high-pressure fuel accumulator and a plurality of the fuel discharge from the high-pressure fuel storage branch pipes serving. These each have at one end a connection head for connecting the branch pipe with an associated connection piece of the high-pressure fuel storage, wherein in each of the branch pipes, a throttle is mounted. The throttle is formed in a carrier element, which is fixed in the region of the connection head by fixing elements which are formed with the formation of the connection head and which constrict a clear width of the branch pipe on both sides of the carrier element. The throttle is in the support member as a through hole with a first partial bore and a second partial bore, that is executed in two stages. The through hole is during the upsetting of the Terminal head secured by an inserted, stepped cylindrical Innenorn, which is formed traceable. The carrier element preferably has a cylindrical lateral surface.

Aus DE 100 60 785 A1 ist eine Kraftstoffeinspritzeinrichtung mit einem Kraftstoffhochdruckspeicher bekannt, an welchen Abzweigrohre anschraubbar sind. Die Abzweigrohre enthalten jeweils eine Drossel zum Abbau von Druckpulsationen in der Kraftstoffeinspritzeinrichtung. Die Drosseln sind jeweils als ein Rohrstück ausgebildet, welches an einem Ende des Abzweigrohres, an dem ein Anschlusskopf angebracht ist, oder im Inneren des Abzweigrohres nahe diesem Ende angeordnet.Out DE 100 60 785 A1 a fuel injection device with a high-pressure fuel storage is known, to which branch pipes are screwed. The branch pipes each include a throttle for reducing pressure pulsations in the fuel injector. The throttles are each formed as a pipe piece, which is arranged at one end of the branch pipe, to which a connection head is attached, or inside the branch pipe near this end.

Die Hochdruckdrosseln dienen zur Reduktion von Druckpulsationen im Hochdruckspeicherraumkörper sowie im Kraftstoffinjektor. Eine Reduktion der Druckspitzen der Druckpulsationen wirkt sich einerseits positiv auf die Festigkeit des Hochdruckspeicherraumkörpers als auch andererseits positiv auf die Hochdruckfestigkeit des Kraftstoffinjektors aus.The high-pressure throttles serve to reduce pressure pulsations in the high-pressure reservoir chamber body and in the fuel injector. A reduction in the pressure peaks of the pressure pulsations has a positive effect on the strength of the high-pressure reservoir chamber body as well as on the other hand has a positive effect on the high-pressure resistance of the fuel injector.

Bei der Lösung gemäß DE 20 2004 019 820.7 besteht die Gefahr, dass bei symmetrischen Hochdruckleitungen eine Gefahr der Verwechslung beim Anschluss an den Hochdruckspeicherraum während der Montage besteht. Darüber hinaus steht bei dieser Lösung aufgrund des Durchmessers der Hochdruckleitungen eventuell nur eine eingeschränkte Auswahl bei den Lieferanten der Hochdruckleitungen zur Verfügung. Ein weiterer Nachteil dieser Lösung ist darin zu erblicken, dass während der Montage eine unzulässige Querschnittsveränderung des Funktionsdurchmessers der Drossel auftreten kann. Würde man der Lösung gemäß DE 20 2004 019 820.7 folgen, so wäre die Dämpfungsfunktion, welche wichtig für Systemverhalten und Systemverschleiß ist, und damit eine funktionsrelevante Funktion des Hochdruckspeichereinspritzsystems in die Verantwortung des Leitungsherstellers gelegt. Das damit einhergehende Risiko ist für den Hersteller von Hochdruckspeichereinspritzsystemen jedoch nicht hinnehmbar.In the solution according to DE 20 2004 019 820.7 there is a risk that with symmetrical high-pressure lines there is a risk of confusion when connecting to the high-pressure reservoir during assembly. In addition, due to the diameter of the high-pressure lines, this solution may only have a limited choice among the suppliers of the high-pressure lines. Another disadvantage of this solution is to be seen in that during assembly an impermissible cross-sectional change of the functional diameter of the throttle may occur. Would you according to the solution DE 20 2004 019 820.7 follow, so the damping function, which is important for system behavior and system wear, and thus a functionally important function of the high-pressure accumulator injection system would be the responsibility of the line manufacturer. However, the associated risk is unacceptable to the manufacturer of high pressure accumulator injection systems.

Darstellung der ErfindungPresentation of the invention

Der erfindungsgemäß vorgeschlagenen Lösung liegt die Aufgabe zugrunde, ein Hochdruckdrosselelement in die Wand des Hochdruckspeicherraumkörpers entweder durch eine radial verlaufende Anschlussbohrung oder durch den Druckraum des Hochdruckspeicherraumes in diesen einzubringen.The solution proposed by the invention is based on the object of introducing a high-pressure throttle element into the wall of the high-pressure reservoir chamber body either through a radially extending connection bore or through the pressure chamber of the high-pressure reservoir.

Der erfindungsgemäß vorgeschlagenen Lösung folgend wird ein Einpressdrosselelement vorgeschlagen, welches entweder im Wege des Tiefziehverfahrens oder des Fließpressens hergestellt wird. Die Einpressdrosselkörper, welche eine ein- oder zweistufig ausgebildete Durchgangsöffnung aufweisen können, werden durch einen Pressvorgang entweder in die in der Wand des Hochdruckspeicherraums (Common Rail) vorgesehenen Anschlussbohrungen für die Hochdruckleitungsanschlüsse (Hochdruckfittings) eingepresst. Es entsteht eine kraftschlüssige Verbindung, z. B. eine Presspassung, die keiner weiteren fertigungstechnischen Nachbehandlung bedarf und insbesondere hochdruckdicht ist. In einem Ausführungsbeispiel ist der Einpressdrosselkörper ein dünnwandiges Bauteil mit einer die Drosselwirkung ermöglichenden Öffnung am Boden. Das tiefgezogene Bauteil lässt sich ebenfalls mittels eines Einpressvorgangs in die Anschlussbohrungen für die Hochdruckzuleitungen zu den einzelnen Kraftstoffinjektoren einpressen, wodurch eine kraftschlüssige Verbindung, gegeben durch eine Presspassung, erreicht wird.Following the solution proposed by the invention, a Einpressdrosselelement is proposed, which is produced either by way of deep drawing or extrusion molding. The Einpressdrosselkörper, which may have a one- or two-stage through-hole, are pressed by a pressing operation either in the provided in the wall of the high pressure accumulator space (common rail) connection holes for the high pressure line connections (high pressure fittings). It creates a positive connection, z. B. an interference fit that requires no further manufacturing technology aftertreatment and is particularly high pressure tight. In one embodiment, the press-fit throttle body is a thin-walled component having a throttle-opening at the bottom. The deep-drawn component can also be pressed by means of a press-fit operation in the connection holes for the high pressure supply lines to the individual fuel injectors, whereby a non-positive connection, given by a press fit, is achieved.

Alternativ zum Einpressen der Einpressdrosselkörper in die radial verlaufenden Anschlussbohrungen in der Wand des Hochdruckspeicherraums (Common Rail) kann ein Einpressdrosselkörper aus Kunststoff oder Federblech durch Spritzgießen, Stanzen, Biegen hergestellt oder im Wege der Zerspantechnik aus einem Rundmaterial gefertigt werden und in den Hohlraum des Hochdruckspeicherraumkörpers (Common Rail) eingebracht werden. In diesem Falle wird entsprechend der Anzahl der Anschlussbohrungen in der Wand des Hochdruckspeicherraumkörpers (Common Rail) eine entsprechende Anzahl von Einpressdrosselkörpern in den Hohlraum des Hochdruckspeicherraumkörpers von einer offenen Seite her eingepresst, bis die einzelnen Einpressdrosselkörper, die eine Drosselöffnung enthalten, so positioniert sind, dass die Drosselöffnung in den Einpressdrosselkörpern den radial verlaufenden Anschlussbohrungen für die Hochdruckzuleitungen zu den Kraftstoffinjektoren gegenüberliegen. Nach Einbringen sämtlicher Einpressdrosselkörper, die ebenfalls mittels einer Presspassung, d. h. auf kraftschlüssigem Wege, im Hohlraum des Hochdruckspeicherraumkörpers fixiert sind, wird das offene Ende des Hochdruckspeicherraumkörpers (Common Rail) mit einem Deckelelement verschlossen.As an alternative to pressing the Einpressdrosselkörper in the radially extending connecting holes in the wall of the high-pressure reservoir (common rail) Einpressdrosselkörper made of plastic or spring steel by injection molding, stamping, bending or manufactured by means of Zerspantechnik from a round material and in the Cavity of the high pressure storage space body (common rail) are introduced. In this case, according to the number of port holes in the wall of the high-pressure storage space body (common rail), a corresponding number of Einpressdrosselkörpern injected into the cavity of the high pressure storage space body from an open side until the individual Einpressschrosselkörper containing a throttle opening are positioned so that the throttle opening in the Einpressdrosselkörpern the radially extending connection holes for the high pressure supply lines to the fuel injectors are opposite. After introduction of all Einpressdrosselkörper, which are also fixed by means of a press fit, ie by force-locking way, in the cavity of the high pressure storage space body, the open end of the high-pressure storage space body (common rail) is closed with a cover element.

Ein weiteres Ausführungsbeispiel der erfindungsgemäß vorgeschlagenen Lösung ist darin zu erblicken, dass der Einpressdrosselkörper aus federndem Stahl oder Kunststoff hergestellt wird. In diesem Falle kann der Einpressdrosselkörper über die radial verlaufende Anschlussbohrung in die Wand des Hochdruckspeicherraumkörpers (Common Rail) eingebracht werden. Die Gestalt des aus federndem Stahl oder aus Kunststoff gefertigten Einpressdrosselkörpers entspricht etwa einem Doppelkegel, dessen engste Einschnürstelle den Drosselquerschnitt bildet. Der Einpressdrosselkörper aus federndem Stahl oder aus Kunststoffmaterial stützt sich sowohl an der Seite der Anschlussbohrung ab, die in den Hochdruckspeicherraum mündet, als auch aus einer z. B. kegelförmig ausbildbaren Vertiefung in der Wand des Hochdruckspeicherraumkörpers (Common Rail).Another embodiment of the proposed solution according to the invention is to be seen in that the press-fit throttle body is made of resilient steel or plastic. In this case, the press-fit throttle body can be introduced via the radially extending connection bore into the wall of the high-pressure reservoir chamber body (common rail). The shape of the Einpressdrosselkörpers made of resilient steel or plastic corresponds approximately to a double cone, the narrowest Einschnürstelle forms the throttle cross-section. The Einpressdrosselkörper of resilient steel or plastic material is supported both on the side of the connection hole, which opens into the high-pressure storage space, as well as from a z. B. conical recess formed in the wall of the high-pressure storage space body (common rail).

Zeichnungdrawing

Anhand der Zeichnung wird die Erfindung nachstehend eingehender beschrieben.With reference to the drawing, the invention will be described below in more detail.

Es zeigt:

Figur 1
ein Beispiel eines Einpress- drosselkörpers, hergestellt aus einem Rundmaterial, das nicht Teil der Erfindung ist.
Figur 1.1
das Einpressdrosselelement gemäß der Darstellung in Figur 1 in einem vergrö- ßertem Maßstab,
Figur 2
ein Ausführungsbeispiel eines Einpressdrosselelementes als tiefgezoge- nes Bauteil,
Figur 2.1
das als tiefgezogenes Bauteil gefertigte Einpressdrosselelement in vergrößerter Darstellung,
Figur 3
ein in Axialrichtung in einen Hohlraum des Hochdruckspeicherraumes einge- schobenes, zylinderförmig konfiguriertes Einpressdrosselelement,
Figur 3.1
das axial in den Hohlraum einschiebbare Einpressdrosselelement gemäß der Darstellung in Figur 3 in vergrößertem Maßstab,
Figur 4
ein weiteres Ausführungsbeispiel eines radial in eine Anschlussbohrung eines Hochdruckspeicherraumes eingeklemmtes, dünnwandiges, als Hyperboloid ge- fertigtes Einpressdrosselelement und
Figur 4.1
das als Hyperboloid gefertigte Einpressdrosselelement gemäß der Darstellung in Figur 4 in vergrößerter Darstellung.
It shows:
FIG. 1
an example of a Einpress- throttle body, made of a round material, which is not part of the invention.
Figure 1.1
the Einpressdrosselelement as shown in FIG FIG. 1 on an enlarged scale,
FIG. 2
An exemplary embodiment of a press-fit throttle element as a deep-drawn component,
Figure 2.1
the press-in throttle element manufactured as a deep-drawn component in an enlarged representation,
FIG. 3
a cylinder-shaped press-fit throttle element inserted into a cavity of the high-pressure reservoir in the axial direction,
Figure 3.1
the axially einschiebbare into the cavity Einpressdrosselelement as shown in FIG FIG. 3 on an enlarged scale,
FIG. 4
Another embodiment of a radially clamped in a connection bore of a high-pressure accumulator space, thin-walled, manufactured as a hyperboloid Einpressdrosselelement and
Figure 4.1
the hyperboloid Einpressdrosselelement shown in FIG FIG. 4 in an enlarged view.

Ausführungsbeispieleembodiments

Der Darstellung gemäß Figur 1 ist ein Beispiel eines Einpressdrosselelementes zu entnehmen, das nicht Teil der Erfindung ist.The representation according to FIG. 1 is an example of a Einpresshrrosselelementes remove, which is not part of the invention.

Gemäß der Darstellung in Figur 1 umfasst ein aus metallischem Material gefertigter Hochdruckspeicher 10, sei es ein lasergeschweißter Hochdruckspeicherraum 10 (LWR-Rail) oder ein geschmiedeter Hochdruckspeicherraum 10 (WFR, Warm Forged Rail), eine Wand 12, deren Dicke entsprechend des Systemdruckes ausgelegt ist. An einer Mantelfläche 14 des Hochdruckspeicherraums 10 ist an einer Kontaktfläche 38 ein Anschlussstück 16 befestigt, welches vorzugsweise mit der Mantelfläche 14 im Bereich der Kontaktfläche 38 stoffschlüssig gefügt, so z. B. geschweißt wird Mittels des Anschlussstückes 16 wird eine Hochdruckleitung 18 mittels einer Überwurfmutter 20 am Hochdruckspeicherraum 10 befestigt. Dazu weist das Anschlussstück 16 ein Außengewinde 24 auf, welches mit dem Innengewinde der Überwurfmutter 20 zusammenwirkt. Die Hochdruckleitung 18 umfasst einen Querschnitt, der durch das Bezugszeichen 22 kenntlich gemacht ist. Die Hochdruckleitung 18, mit dem ein in Figur 1 nicht dargestellter Kraftstoffinjektor mit unter Systemdruck stehendem Kraftstoff beaufschlagt wird oder eine Hochdruckpumpe mit dem Hochdruckspeicherraum 10 verbunden ist, ist mit ihrem kegelförmigen Ende 26 an einer als Dichtkegel dienenden Ausformung 36 in der Wand 12 des Hochdruckspeicherraums 10 angestellt. Dazu ist oberhalb des kegelförmigen Endes 26 der Hochdruckzuleitung 18 ein Anstellbund 40 vorgesehen. Auf dem Anstellbund 40 stützt sich ein Innenring 42 der Überwurfmutter 20 ab. Entsprechend des Anzugsdrehmomentes der Überwurfmutter 20 wird das kegelig ausgebildete Ende 26 der Hochdruckzuleitung 18 in die Ausformung 36 in der Wand 12 des Hochdruckspeicherraums 10 eingepresst, so dass sich zwischen dem kegelförmigen Ende 26 der Hochdruckleitung 18 und der Wand 12 des Hochdruckspeicherraums 10 eine druckdichte Verbindung ergibt.As shown in FIG. 1 includes a high-pressure accumulator 10 made of metallic material, be it a laser-welded high-pressure reservoir 10 (LWR rail) or a forged high-pressure reservoir 10 (WFR, Warm Forged Rail), a wall 12 whose thickness is designed according to the system pressure. On a lateral surface 14 of the high-pressure storage space 10, a connecting piece 16 is attached to a contact surface 38, which preferably has a material fit with the lateral surface 14 in the area of the contact surface 38, such as, for example, FIG. B. is welded by means of the connecting piece 16, a high-pressure line 18 is fixed by means of a union nut 20 at the high pressure storage space 10. For this purpose, the connecting piece 16 has an external thread 24 which cooperates with the internal thread of the union nut 20. The high-pressure line 18 comprises a cross-section, which is identified by the reference numeral 22. The high pressure line 18, with a in FIG. 1 not shown fuel injector is pressurized with fuel under system pressure or a high-pressure pump is connected to the high-pressure accumulator 10 is employed with its conical end 26 serving as a sealing cone 36 in the wall 12 of the high-pressure accumulator 10. For this purpose, a Anstellbund 40 is provided above the conical end 26 of the high-pressure feed line 18. On the Anstellbund 40, an inner ring 42 of the union nut 20 is supported. According to the tightening torque of the union nut 20 is the conically shaped end 26 of the high-pressure feed line 18 is pressed into the formation 36 in the wall 12 of the high pressure accumulator 10 so that there is a pressure-tight connection between the conical end 26 of the high pressure line 18 and the wall 12 of the high-pressure accumulator 10.

In der Wand 12 des Hochdruckspeicherraums 10 sind entsprechend der Anzahl der mit unter hohem Druck stehenden Kraftstoff zu versorgenden Kraftstoffinjektoren oder der angeschlossenen Hochdruckpumpen Anschlussbohrungen 30 ausgeführt. In den Anschlussbohrungen 30 befinden sich Drosselkörper 28, die gemäß des in Figur 1 dargestellten Ausführungsbeispiels zerspanend aus einem Rundmaterial hergestellt sind Durch die mittels der Überwurfmutter 20 dichtend in die Ausformung 36 in der Wand 12 angestellte Hochdruckzuleitung 18 wird der Drosselkörper 28 aus Rundmaterial in die Anschlussbohrung 30 eingepresst. Die Mantelfläche 32 des Drosselkörpers 28 bildet somit eine kraftschlüssige Verbindung zwischen dem Drosselkörper 28 und der Wand 12 des Hochdruckspeicherraums 10.In the wall 12 of the high-pressure accumulator 10 connecting bores 30 are executed according to the number of under high pressure fuel to be supplied fuel injectors or connected high-pressure pump. In the connection bores 30 are throttle body 28, which according to the in FIG. 1 By means of the union nut 20 sealingly employed in the molding 36 in the wall 12 high pressure supply line 18 of the throttle body 28 is pressed from round material into the connection bore 30. The lateral surface 32 of the throttle body 28 thus forms a non-positive connection between the throttle body 28 and the wall 12 of the high pressure accumulator 10th

Der Drosselkörper 28 umfasst eine Durchgangsbohrung, welche als Drosselkanal 34 dient.The throttle body 28 includes a through hole, which serves as a throttle passage 34.

Der Darstellung gemäß Figur 1.1 ist der aus Rundmaterial, Kunststoff oder Federblech herstellbare Drosselkörper gemäß der Darstellung in Figur 1 in vergrößerter Ansicht zu entnehmen.The representation according to Figure 1.1 is the manufacturable from round material, plastic or spring plate throttle body as shown in FIG FIG. 1 to be seen in an enlarged view.

Aus der Darstellung gemäß Figur 1.1 geht hervor, dass der aus Rundmaterial zerspanend hergestellte Drosselkörper 28 eine Durchgangsbohrung aufweist, die einen ersten Durchmesser 44 und einen zweiten Durchmesser 46 aufweist. Der erste Durchmesser 44 liegt auf Seiten der ersten Stirnfläche 48 des Drosselkörpers 28, wohingegen der zweite Durchmesser 46 des Drosselkanales 34 in einer zweiten Stirnfläche 50 des Drosselkörpers 28 mündet. Die jeweiligen Durchmesser 44 bzw. 46, in denen der Drosselkanal 34 ausgelegt sein kann, können sich auch in anderen Proportionen als in Figur 1.1 dargestellt innerhalb des Drosselkörpers 28 erstrecken. Der in Figur 1.1 dargestellte Drosselkörper 28 mit zwei Durchmessern 44 für den Drosselkanal 34 stellt somit eine gestufte Drossel dar, wobei der zweite Durchmesser 46 des Drosselkanales 34 in den Strömungsquerschnitt 22 der oberhalb des Drosselkörpers 28 angeschlossenen Hochdruckleitung 18 mündet.From the illustration according to Figure 1.1 It can be seen that the throttle body 28 made of round material has a through-bore which has a first diameter 44 and a second diameter 46. The first diameter 44 lies on the side of the first end face 48 of the throttle body 28, whereas the second diameter 46 of the throttle channel 34 opens in a second end face 50 of the throttle body 28. The respective diameters 44 and 46, in which the throttle channel 34 may be designed, may also be in other proportions than in Figure 1.1 shown extend within the throttle body 28. The in Figure 1.1 illustrated throttle body 28 with two diameters 44 for the throttle passage 34 thus represents a stepped throttle, wherein the second diameter 46 of the throttle passage 34 opens into the flow cross section 22 of the high pressure line 18 connected above the throttle body 28.

Der Darstellung gemäß Figur 2 ist ein Ausführungsbeispiel der erfindungsgemäß vorgeschlagenen Einpressdrossel zu entnehmen.The representation according to FIG. 2 is an embodiment of the present invention proposed Einpressdrossel refer.

Aus der Darstellung gemäß Figur 2 geht hervor, dass der in die Anschlussbohrung 30 in der Wand 12 des Hochdruckspeicherraums 10 eingelassene Drosselkörper 28 als tiefgezogenesFrom the illustration according to FIG. 2 shows that in the connection bore 30 in the wall 12 of the high-pressure accumulator 10 recessed throttle body 28 as a deep drawn

Bauteil, d. h. als tiefgezogener Drosselkörper 52 ausgebildet ist. Der tiefgezogene Drosselkörper 52 gemäß der Darstellung in Figur 2 ist in die Anschlussbohrung 30 eingepresst und liegt mit einer oberen Auflagefläche 56 im Bereich der Ausformung 36 in der Wand 12 des Hochdruckspeicherraumes 10 an. Die sich unterhalb der Auflagefläche 56 erstreckende Mantelfläche liegt an der Innenwand der Anschlussbohrung 30 an.Component, that is designed as a deep-drawn throttle body 52. The deep-drawn throttle body 52 as shown in FIG FIG. 2 is pressed into the connection bore 30 and abuts with an upper support surface 56 in the region of the formation 36 in the wall 12 of the high pressure storage space 10. The lateral surface extending below the support surface 56 bears against the inner wall of the connection bore 30.

Die Hochdruckzuleitung (nicht dargestellt) wird gemäß dieses Ausführungsbeispiels mittels einer Überwurfmutter 20 am Anschlussstück 16 (Hochdruckfitting) angeschlossen.The high pressure supply line (not shown) is connected according to this embodiment by means of a union nut 20 on the connector 16 (high pressure fitting).

Das sich gemäß der Darstellung in Figur 2 sowohl mit seiner Auflagefläche 56 als auch mit seiner Mantelfläche in der Anschlussbohrung 30 kraftschlüssig abstützende Bauteil 52 weist am Boden einen hier lochförmig ausgebildeten Drosselkanal 34 auf.According to the illustration in FIG. 2 both with its support surface 56 and with its lateral surface in the connection bore 30 frictionally supporting component 52 has at the bottom of a here hole-shaped throttle channel 34.

Figur 2.1 zeigt den als Tiefziehbauteil ausgebildeten Drosselkörper gemäß der Darstellung in Figur 2 in vergrößertem Maßstab. Figure 2.1 shows the formed as a deep-drawn throttle body as shown in FIG FIG. 2 on an enlarged scale.

Aus der Darstellung gemäß Figur 2.1 geht hervor, dass der tiefgezogene Drosselkörper 52 ein im Wesentlichen topfförmiges Aussehen hat und in einer für das Tiefziehverfahren geeigneten, geringen Wanddicke 54 ausgeführt ist. Im Boden des im Wesentlichen topfförmig ausgebildeten, tiefgezogenen Drosselkörpers 52 befindet sich der Drosselkanal 34, der gemäß diesem Ausführungsbeispiel als einfache Durchgangsbohrung beschaffen ist. Im oberen Bereich, d. h. an der offenen, dem Drosselkanal 34 gegenüberliegenden Seite ist der tiefgezogene Drosselkörper 52 mit einer Durchmessererweiterung versehen. Dadurch wird an dem dem Anschlussstück 18 zuweisenden Ende des tiefgezogenen Drosselkörpers 52 eine Auflagefläche 56 geformt, mit welcher sich dieser in der Ausformung 36 in der Wand 12 des Hochdruckspeicherraums 10 abstützen kann. Beim Einpressen des in Figur 2.1 dargestellten tiefgezogenen Drosselkörpers 52 in die Anschlussbohrung 30 in der Wand 12 des Hochdruckspeicherraums 10 stellt sich zwischen der Auflagefläche 56 und der Ausformung 36 in der Wand 12 ebenso eine kraftschlüssige Verbindung ein wie zwischen der Mantelfläche am tiefgezogenen Drosselkörper 52 unterhalb der Auflagefläche 56 und der Innenwand der Anschlussbohrung 30 in der Wand 12 des Hochdruckspeicherraumes 10.From the illustration according to Figure 2.1 shows that the deep-drawn throttle body 52 has a substantially cup-shaped appearance and is designed in a suitable for thermoforming, small wall thickness 54. In the bottom of the substantially cup-shaped, deep-drawn throttle body 52 is the throttle channel 34, which is designed according to this embodiment as a simple through hole. In the upper region, ie at the open, the throttle channel 34 opposite side of the deep-drawn throttle body 52 is provided with a diameter extension. As a result, at the end of the deep-drawn throttle body 52 facing the connection piece 18, a support surface 56 is formed, with which it can be supported in the formation 36 in the wall 12 of the high-pressure storage space 10. When pressing the in Figure 2.1 illustrated deep-drawn throttle body 52 in the connection bore 30 in the wall 12 of the high-pressure accumulator 10 is between the support surface 56 and the molding 36 in the wall 12 as a non-positive connection as between the outer surface of the deep-drawn throttle body 52 below the support surface 56 and the inner wall of the Connecting bore 30 in the wall 12 of the high-pressure accumulator 10th

Gemäß des in Figur 2.1 dargestellten Ausführungsbeispieles befindet sich der Drosselkanal 34 im in die Anschlussbohrung 30 montierten Zustand des tiefgezogenen Drosselkörpers 52 noch innerhalb der Anschlussbohrung 30 und kann, wie im Ausführungsbeispiel gemäß Figur 4 dargestellt, in den Hohlraum des Hochdruckspeicherraums 10 hineinragen, der von der Wand 12 begrenzt wird.According to the in Figure 2.1 illustrated embodiment, the throttle channel 34 is in the mounted in the connection bore 30 state of the deep-drawn throttle body 52 still within the connection bore 30 and can, as shown in the embodiment of Figure 4, protrude into the cavity of the high-pressure accumulator 10, which is bounded by the wall 12.

Figur 3 zeigt ein weiteres Ausführungsbeispiel der erfindungsgemäß vorgeschlagenen Einpressdrossel. FIG. 3 shows a further embodiment of the present invention proposed Einpressdrossel.

In der Darstellung gemäß Figur 3 ist ein zylinderförmig ausgebildeter Drosselkörper 58 von einem offenen Ende des Hochdruckspeicherraums 10 aus in dessen Hohlraum 68 axial eingeschoben. Mit Bezugszeichen 76 ist eine kuppenförmige Erhebung an der Mantelfläche des zylinderförmig ausgebildeten Drosselkörpers 58 bezeichnet, welche im montierten Zustand des zylinderförmig ausgebildeten Drosselkörpers 58 in die Anschlussbohrung 30 in der Wand 12 des Hochdruckspeicherraums 10 einschnappt und somit die axiale Position des zylinderförmigen Drosselkörpers 58 im Hohlraum 68 des Hochdruckspeicherraums 10 definiert. Im montierten Zustand befindet sich unterhalb einer jeden die Wand 12 des Hochdruckspeicherraums 10 durchziehenden Anschlussbohrung 30 ein zylinderförmig ausgebildeter Drosselkörper 58. Im Bereich der Kuppe 76 ist in der Mantelfläche des zylinderförmigen Drosselkörpers 58 eine Drosselöffnung 72 ausgeführt, über welche der Kraftstoff zur Dämpfung von Druckpulsationen vom Hohlraum 68 in die Anschlussbohrung 30 und von dort in die an der Mantelfläche 14 des Hochdruckspeicherraums 10 angeschlossene Hochdruckleitung 18 einschießt.In the illustration according to FIG. 3 is a cylinder-shaped throttle body 58 from an open end of the high-pressure accumulator chamber 10 in the cavity 68 axially inserted. Reference numeral 76 denotes a dome-shaped elevation on the lateral surface of the cylinder-shaped throttle body 58, which snaps into the connecting bore 30 in the wall 12 of the high-pressure reservoir 10 in the mounted state of the cylindrical throttle body 58 and thus the axial position of the cylindrical throttle body 58 in the cavity 68 of the high pressure accumulator 10 defined. In the assembled state is below each of the wall 12 of the high-pressure accumulator 10 traversing port bore 30 is a cylindrically shaped throttle body 58. In the region of the dome 76 in the lateral surface of the cylindrical throttle body 58, a throttle opening 72 is executed, via which the fuel for damping of pressure pulsations Cavity 68 into the connection bore 30 and from there into the on the lateral surface 14 of the high-pressure accumulator 10 connected high-pressure line 18 einschießt.

Der Darstellung gemäß Figur 3.1 ist eine vergrößerte Darstellung des zylinderförmig ausgebildeten Drosselkörpers gemäß Figur 3 zu entnehmen. Aus der perspektivischen Darstellung gemäß Figur 3.1 geht hervor, dass der zylinderförmig ausgebildete Drosselkörper 58 eine Mantelfläche 64 aufweist, die in axialer Richtung mit einer Längsschlitzung 60 versehen ist. Die Längsschlitzung 60 in der Mantelfläche 64 des zylinderförmigen Drosselkörpers 58 begrenzenden Enden sind mit Verrundungen 62 versehen. Aufgrund der Längsschlitzung 60 in der Mantelfläche 64 des zylinderförmig ausgebildeten Drosselkörpers 58 ist dieser federelastisch und lässt sich in Einschubrichtung 66 gesehen in den Hohlraum 68 des Hochdruckspeicherraums 10 gemäß der Darstellung in Figur 3 in axialer Richtung montieren. Sobald die Kuppe 76 mit darin ausgebildeter Drosselöffnung 52 in eine Anschlussbohrung 30 in der Wand 12 des Hochdruckspeicherraums 10 einschnappt, ist der zylinderförmig ausgebildete Drosselkörper 58 in axialer Richtung im Hohlraum 68 des Hochdruckspeicherraums 10 fixiert. Entsprechend der Anzahl der in der Wand 12 des Hochdruckspeicherraums 10 ausgebildeten Anschlussbohrungen 30 wird eine dieser entsprechende Anzahl von zylinderförmig ausgebildeten Drosselkörpern 58 in Einschubrichtung 66 in von einem offenen Ende eines vorzugsweise als lasergeschweißten Hochdruckspeicherraums 10 ausgebildeten Körper eingeführt.The representation according to Figure 3.1 is an enlarged view of the cylinder-shaped throttle body according to FIG. 3 refer to. From the perspective view according to Figure 3.1 shows that the cylinder-shaped throttle body 58 has a lateral surface 64, which is provided in the axial direction with a longitudinal slot 60. The longitudinal slots 60 in the lateral surface 64 of the cylindrical throttle body 58 delimiting ends are provided with fillets 62. Due to the longitudinal slot 60 in the circumferential surface 64 of the cylinder-shaped throttle body 58 of this is resilient and can be seen in the insertion direction 66 in the cavity 68 of the high-pressure accumulator chamber 10 as shown in FIG FIG. 3 mount in the axial direction. As soon as the dome 76 with the throttle opening 52 formed therein snaps into a connection bore 30 in the wall 12 of the high-pressure reservoir 10, the cylinder-shaped throttle body 58 is fixed in the axial direction in the cavity 68 of the high-pressure reservoir 10. Corresponding to the number of connecting bores 30 formed in the wall 12 of the high-pressure reservoir 10, a corresponding number of cylinder-shaped throttle bodies 58 are introduced in the insertion direction 66 from an open end of a preferably laser-welded high-pressure reservoir 10.

Aufgrund der radialen Elastizität, die durch die Längsschlitzung 60 des in einer geringen Wandstärke 74 ausgebildeten zylinderförmigen Drosselkörpers 58 erreicht wird, lassen sich die zylinderförmig ausgebildeten Drosselkörper 58 in axial verlaufender Einschubrichtung 66 von einem offenen Ende des Hochdruckspeicherraums 10 in diesen einschieben und anschließend in ihre entsprechende Radialposition unterhalb der einzelnen Anschlussbohrungen 30 verdrehen, so dass die kuppenförmige Erhebung 76 in der Mantelfläche 64 des zylinderförming ausgebildeten Drosselkörpers 58 in die Anschlussbohrung 30 eingreift und der zylinderförmig ausgebildete Drosselkörper 58 somit innerhalb des Hohlraums 68 des Hochdruckspeicherraums 10 arretiert ist.Due to the radial elasticity, which is achieved by the longitudinal slots 60 of the cylindrical wall formed in a small wall thickness 74, the cylindrical throttle body 58 can be in the axial direction of insertion Insert 66 of an open end of the high-pressure accumulator 10 in this and then rotate in their corresponding radial position below the individual connection holes 30 so that the dome-shaped elevation 76 in the circumferential surface 64 of the cylinder-shaped throttle body 58 engages in the connection bore 30 and the cylinder-shaped throttle body 58th thus locked within the cavity 68 of the high-pressure storage space 10.

Der Darstellung gemäß Figur 4 ist ein als Hyperboloid beschaffener Einpressdrosselkörper 80 zu entnehmen. Aus der Darstellung gemäß Figur 4 geht hervor, dass das Anschlussstück 16 gemäß dieses Ausführungsbeispieles ebenfalls an der Mantelfläche 14 der Wand 12 des Hochdruckspeicherraums 10 stoffschlüssig gefügt ist. Das stoffschlüssige Fügen erfolgt z. B. im Wege des Laserschweißens, womit ein hoher Automatisierungsgrad in der Serienfertigung erreicht werden kann.The representation according to FIG. 4 is to be taken as a Hyperboloid created Einpressdrosselkörper 80. From the illustration according to FIG. 4 It is apparent that the connecting piece 16 according to this embodiment is also joined cohesively to the lateral surface 14 of the wall 12 of the high-pressure storage space 10. The cohesive joining takes place z. B. by way of laser welding, whereby a high degree of automation in mass production can be achieved.

In der Wand 12 des Hochdruckspeicherraums 10 (Common Rail) befindet sich eine trichterförmig konfigurierte Ausformung 36, welche als Dichtkegel dient. Die als Dichtkegel dienende Ausformung 36 in der Wand 12 des Hochdruckspeicherraums 10 geht in eine mit stetigem Durchmesser gefertigte Anschlussbohrung 30 über. In die Anschlussbohrung 30 gemäß der Darstellung in Figur 4 ist ein als Hyperboloid ausgebildeter Drosselkörper 80 eingeklemmt. Der als Hyperboloid ausgebildete Drosselkörper 80 stützt sich einerseits an einer ersten Kontaktstelle 84 innerhalb der Ausformung 36 der Wand 12 des Hochdruckspeicherraums 10 ab und ist andererseits an einer zweiten Kontaktstelle 86 an der Mündungsstelle der Anschlussbohrung 30 in den Hohlraum 68 des Hochdruckspeicherraums 10 kraftschlüssig gehalten. Aus der Darstellung gemäß Figur 4 geht hervor, dass der als Hyperboloid beschaffene Drosselkörper 80 um einen Überstand 90 in den Hohlraum 68 des Hochdruckspeicherraums 10 hineinragt. Durch den Überstand 90 des Drosselkörpers 80 wird die Federkraft, d. h. die Haltekraft, an einer 2. Kontaktstelle 86 des Drosselkörpers 80 in der Anschlussbohrung 30 erzeugt. Der Darstellung gemäß Figur 4.1 ist der als Hyperboloid ausgebildete Drosselkörper gemäß der Darstellung in Figur 4 in vergrößertem Maßstab zu entnehmen.In the wall 12 of the high-pressure accumulator 10 (common rail) is a funnel-shaped configuration 36, which serves as a sealing cone. The serving as a sealing cone formation 36 in the wall 12 of the high-pressure accumulator 10 is in a made with a continuous diameter connection bore 30 on. In the connection bore 30 as shown in FIG FIG. 4 is a trained as hyperboloid throttle body 80 is clamped. Trained as a hyperboloid throttle body 80 is supported on the one hand at a first contact point 84 within the formation 36 of the wall 12 of the high-pressure accumulator 10 and on the other hand frictionally held at a second contact point 86 at the discharge point of the connection bore 30 into the cavity 68 of the high-pressure accumulator. From the illustration according to FIG. 4 It can be seen that the throttle body 80 designed as a hyperboloid projects around a projection 90 into the cavity 68 of the high-pressure reservoir 10. Due to the projection 90 of the throttle body 80, the spring force, ie the holding force, generated at a second contact point 86 of the throttle body 80 in the connection bore 30. The representation according to Figure 4.1 is formed as a hyperboloid throttle body as shown in FIG FIG. 4 to be taken on an enlarged scale.

Der als Hyperboloid ausgebildete Drosselkörper 80 ist im Wesentlichen doppelkegelförmig ausgebildet. Der als Hyperboloid ausgebildete Drosselkörper 80 umfasst eine Einschnürstelle 82, welche den Strömungsquerschnitt des Drosselkanals 34 (vgl. Bezugszeichen 96 Drosselquerschnitt) begrenzt. Der als Hyperboloid ausgebildete Drosselkörper 80 umfasst eine erste Öffnung 92, welche der Hochdruckleitung 18 gegenüberliegt, sowie eine zweite Öffnung 94, die in den Hohlraum 68 des Hochdruckspeicherraums 10 gemäß der Darstellung in Figur 4 mündet. Die Außenmantelfläche im Bereich der ersten Öffnung 92 bildet die Auflagefläche 56, mit der sich der als Hyperboloid ausgebildete Drosselkörper 80 an der Ausformung 36 in der Wand 12 des Hochdruckspeicherraums 10 abstützt.The throttle body 80, which is in the form of a hyperboloid, has a substantially double conical shape. The throttle body 80 designed as a hyperboloid comprises a constriction site 82 which limits the flow cross section of the throttle passage 34 (see reference numeral 96 throttle cross section). The throttle body 80 designed as a hyperboloid comprises a first opening 92, which is opposite the high-pressure line 18, and a second opening 94, which enters the cavity 68 of the high-pressure reservoir 10 as shown in FIG FIG. 4 empties. The outer circumferential surface in the region of the first opening 92 forms the bearing surface 56, with which formed as a hyperboloid throttle body 80 is supported on the formation 36 in the wall 12 of the high-pressure accumulator space 10.

Der dem Hohlraum 68 des Hochdruckspeicherraums 10 zuweisende Teil des als Hyperboloid ausgebildeten Drosselkörpers 80 unterhalb der Einschnürstelle 82 weist mehrere Axialschlitze 88 auf, von denen gemäß Figur 4.1 aus zeichnerischen Gründen lediglich einer dargestellt ist. Weitere Axialschlitze 88 liegen in der Zeichenebene.The portion of the hyperboloid-shaped throttle body 80 below the constriction site 82 has a plurality of axial slots 88, of which, according to FIG Figure 4.1 for illustrative reasons, only one is shown. Further axial slots 88 are in the plane of the drawing.

Aufgrund der Axialschlitzung 88 stellt sich im unteren Bereich des als Hyperboloid ausgebildeten Drosselkörpers 80 eine hohe Elastizität ein, so dass der als Hyperboloid ausgebildete Drosselkörper 80 in radialer Richtung einfach in die Anschlussbohrung 30 eingeschoben werden kann und an der ersten Kontaktstelle 84 und an der zweiten Kontaktstelle 86 (vgl. Darstellung gemäß Figur 4) eine kraftschlüssige Verbindung mit der Ausformung 36 bzw. der Innenwand der Anschlussbohrung 30 eingeht.Due to the axial slot 88, a high elasticity arises in the lower region of the throttle body 80 in the form of a hyperboloid so that the hyperboloidal throttle body 80 can simply be pushed into the connecting bore 30 in the radial direction and at the first contact point 84 and at the second contact point 86 (see illustration according to FIG. 4 ) enters into a frictional connection with the molding 36 and the inner wall of the connection bore 30.

Der in Figur 4.1 dargestellte, als Hyperboloid beschaffene Drosselkörper 80 wird vorzugsweise aus einem dünnwandigen metallischen Material hergestellt. Alternativ dazu kann der als Hyperboloid beschaffene Drosselkörper 80 auch aus Kunststoff hergestellt werden. Dabei ist jedoch sicherzustellen, dass das Kunststoffmaterial derart gewählt wird, dass dieses den im Hohlraum 68 des Hochdruckspeicherraums 10 herrschenden Drücken standhält.The in Figure 4.1 illustrated, designed as hyperboloid throttle body 80 is preferably made of a thin-walled metallic material. Alternatively, the throttle body 80 designed as a hyperboloid may also be made of plastic. In this case, however, it must be ensured that the plastic material is chosen such that it withstands the pressure prevailing in the cavity 68 of the high-pressure storage space 10.

Sämtliche in den Figuren 2 bis 4.1 dargestellten Ausführungsbeispiele der erfindungsgemäß vorgeschlagenen Einpressdrossel dienen zur Reduktion von Druckpulsationen im Hochdruckspeicherraum 10 und im über die Hochdruckleitung 18 an diesen angeschlossenen Kraftstoffinjektoren. Die Reduktion von Druckpulsationen innerhalb des Hochdruckspeicherraumes 10 (Common Rail) bzw. der mit diesem verbundenen Kraftstoffinjektoren wirken sich positiv auf die Festigkeit des Hochdruckspeicherraums 10 und der mit diesem fluidisch verbundenen Kraftstoffinjektoren aus. Die Reduktion der Druckpulsationen im Hochdruckspeicherraum 10 über die erfindungsgemäß vorgeschlagenen, als Einpressdrosseln ausgebildeten Drosselkörper 52, 58 bzw. 80 ist dabei abhängig vom jeweils gewählten Strömungsquerschnitt des Drosselkanales 34, sei dieser als Loch im Boden des als Tiefziehbauteil hergestellten Drosselelementes 52, sei dieser als Drosselöffnung 72 in der Mantelfläche 64 eines zylinderförmig ausgebildeten Drosselkörpers 58 ausgeführt oder als Einschnürstelle 82 in einem als Hyperboloid ausgebildeten Drosselkörper 80, wie in den Figuren 4 bzw. 4.1 im Einzelnen dargestellt.All in the FIGS. 2 to 4.1 illustrated embodiments of the present invention proposed Einpressdrossel serve to reduce pressure pulsations in the high pressure accumulator chamber 10 and in the high pressure line 18 connected to these fuel injectors. The reduction of pressure pulsations within the high-pressure reservoir 10 (common rail) or the fuel injectors connected thereto have a positive effect on the strength of the high-pressure reservoir 10 and of the fuel injectors fluidically connected thereto. The reduction of the pressure pulsations in the high-pressure reservoir 10 via the inventively proposed, designed as Einpressdrosseln throttle body 52, 58 and 80 is dependent on the selected flow cross-section of the throttle channel 34, be this as a hole in the bottom of the throttle element produced as a thermoforming element 52, this as a throttle opening 72 executed in the circumferential surface 64 of a cylinder-shaped throttle body 58 or as a constriction 82 in a hyperboloid designed as a throttle body 80, as in the FIGS. 4 or 4.1 shown in detail.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Hochdruckspeicherraum (Common Rail)High-pressure storage space (common rail)
1212
Wandwall
1414
Mantelflächelateral surface
1616
Anschlussstückconnector
1818
HochdruckleitungHigh-pressure line
2020
ÜberwurfmutterNut
2222
Querschnitt HochdruckleitungCross section of high pressure line
2424
Außengewindeexternal thread
2626
kegelförmiges Ende Hoch- druckleitungconical end high pressure line
2828
Drosselkörperthrottle body
3030
Anschlussbohrungconnection bore
3232
Mantelfläche DrosselkörperLateral surface of the throttle body
3434
Drosselkanalthrottle channel
3636
Ausformung in Kegelform (Dichtkegel)Forming in conical form (sealing cone)
3838
Kontaktfläche Anschlussstück - RailContact surface Connection piece - Rail
4040
AnstellbundAnstellbund
4242
Innenringinner ring
4444
1. Durchmesser Drosselkanal 341st diameter throttle channel 34th
4646
2. Durchmesser Drosselkanal 342nd diameter throttle channel 34th
4848
1. Stirnfläche Drosselkörper 281. end face throttle body 28th
5050
2. Stirnfläche Drosselkörper 282nd end face throttle body 28
5252
tiefgezogener Drosselkörperdeep drawn throttle body
5454
Wanddickewall thickness
5656
konische Auflageflächeconical bearing surface
5858
zylinderförmiger Drosselkör- percylindrical throttle body
6060
Längsschlitzunglongitudinal slit
6262
verrundete Endenrounded ends
6464
Mantelflächelateral surface
6666
Einschubrichtunginsertion direction
6868
Hohlraum Hochdruckspei- cherraum 10Cavity high-pressure storage chamber 10
7272
Drosselöffnung in Mantelflä- che 64Throttle opening in lateral surface 64
7474
Wanddickewall thickness
7676
Kuppeknoll
8080
Drosselkörper Hyperboloid- formThrottle body hyperboloid form
8282
Einschnürstelleconstriction
8484
1. Kontaktstelle1st contact point
8686
2. Kontaktstelle2nd contact point
8888
Axialschlitzaxial slot
9090
Überstand in Hohlraum 68Supernatant in cavity 68
9292
1. Öffnung zur Hochdrucklei- tung 181. Opening to the high-pressure line 18
9494
2. Öffnung zum Hohlraum 682. opening to the cavity 68th
9696
DrosselquerschnittThrottle cross section

Claims (8)

  1. Fuel injection device for an internal combustion engine, having a high-pressure accumulator chamber (10) with a plurality of connecting bores (30) which serve for discharging fuel out of or supplying fuel to the high-pressure accumulator chamber (10), to which connecting bores (30) are connected high-pressure feed lines (18) to fuel injectors or fuel supply lines from a high-pressure source, with at least the connecting bores (30) of the high-pressure feed lines (18) to the fuel injectors being assigned at least one throttle element (28, 58) which has a throttle duct (34) of at least single-stage design and which, as a press-in throttle element, is pressed into a wall (12) of the high-pressure accumulator chamber (10) and is held in the connecting bores (30) of the high-pressure accumulator chamber (10) in a frictionally engaging manner at at least one contact point (64), characterized in that the at least one throttle element (28, 58) is created as a pre-formed component which has elastic properties, and is designed as a thin-walled cylinder provided with a longitudinal slot (60) and has a lateral surface (64) which is formed with a dome-shaped elevation (76) with a throttle opening (72).
  2. Fuel injection device according to Claim 1, characterized in that the at least one throttle element (28, 58) is manufactured from a material produced by powder metallurgy or from plastic.
  3. Fuel injection device according to Claim 1, characterized in that the at least one throttle element (28, 58) in the shape of a cylinder is pushed into a cavity (68) of the high-pressure accumulator chamber (10) in the axial direction (66).
  4. Fuel injection device according to Claim 1, characterized in that the assembled position of the at least one throttle element (28, 58), which is formed in the shape of a cylinder, in the cavity (68) of the high-pressure accumulator chamber (10) is defined by the dome (76) with the throttle opening (72) in the lateral surface (64), which dome (76) latches into the connecting bore (30).
  5. Fuel injection device for an internal combustion engine, having a high-pressure accumulator chamber (10) with a plurality of connecting bores (30) which serve for discharging fuel out of or supplying fuel to the high-pressure accumulator chamber (10), to which connecting bores (30) are connected high-pressure feed lines (18) to fuel injectors or fuel supply lines from a high-pressure source, with at least the connecting bores (30) of the high-pressure feed lines (18) to the fuel injectors being assigned at least one throttle element (28, 80) which has a throttle duct (34) of at least single-stage design and which, as a press-in throttle element, is pressed into a wall (12) of the high-pressure accumulator chamber (10) and is held in the connecting bores (30) of the high-pressure accumulator chamber (10) in a frictionally engaging manner at at least one contact point (84, 86), characterized in that the at least one throttle element (28, 80) is created as a pre-formed component which has elastic properties, and is in the shape of a hyperboloid and has a lateral surface (64) which has a first contact point (84) against a shaped-out portion (36), which serves as a sealing cone, of the high-pressure accumulator chamber (10) and a second contact point (86) against the connecting bore (30) of the high-pressure accumulator chamber (10).
  6. Fuel injection device according to Claim 5, characterized in that the throttle element (28, 80) in the shape of a hyperboloid is manufactured from metallic material or from plastic material with resilient properties.
  7. Fuel injection device according to Claim 5, characterized in that the throttle element (28, 80) in the shape of a hyperboloid has a constriction point (82), which serves as a throttle duct (34), between a first opening (92) to the connecting piece (16) and a second opening (94) to the cavity (68) of the high-pressure accumulator chamber (10).
  8. Fuel injection device according to Claim 5, characterized in that the throttle element (28, 80) in the shape of a hyperboloid has a conical contact surface (56) on its side facing towards the connecting piece (16) and has at least one axial slot (88) on its side facing toward the cavity (68) of the high-pressure accumulator chamber (10).
EP06754873A 2005-06-10 2006-04-27 High-pressure accumulator space body having high-pressure restrictors Expired - Fee Related EP1893867B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510026993 DE102005026993A1 (en) 2005-06-10 2005-06-10 High-pressure storage chamber body with high-pressure throttles
PCT/EP2006/061862 WO2006131420A1 (en) 2005-06-10 2006-04-27 High-pressure accumulator space body having high-pressure restrictors

Publications (2)

Publication Number Publication Date
EP1893867A1 EP1893867A1 (en) 2008-03-05
EP1893867B1 true EP1893867B1 (en) 2010-06-23

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JP (1) JP2008542624A (en)
DE (2) DE102005026993A1 (en)
WO (1) WO2006131420A1 (en)

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EP2071174B1 (en) * 2007-12-10 2011-03-23 Delphi Technologies Holding S.à.r.l. Jet for orifice damping
DE102008017228A1 (en) * 2008-04-04 2009-10-08 Continental Automotive Gmbh fluid system
JP2014088791A (en) * 2012-10-29 2014-05-15 Denso Corp Common rail for fuel injection device
DE102016209423A1 (en) * 2016-05-31 2017-11-30 Robert Bosch Gmbh High-pressure accumulator and method for producing a high-pressure accumulator
CN111433450B (en) * 2017-12-08 2022-01-28 沃尔沃卡车集团 Device for a common rail fuel injection system
CN112555077A (en) * 2020-12-03 2021-03-26 一汽解放汽车有限公司 Common rail pipe and diesel engine high-pressure oil supply system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3503784B2 (en) * 1995-10-13 2004-03-08 株式会社デンソー Accumulation type fuel injection device
JPH10213045A (en) * 1996-11-30 1998-08-11 Usui Internatl Ind Co Ltd Connecting structure for branch connecting body in common rail
JP3763698B2 (en) * 1998-10-22 2006-04-05 株式会社日本自動車部品総合研究所 Design method of fuel supply system that can relieve pressure pulsation
GB2358898B (en) 1999-12-09 2002-04-24 Usui Kokusai Sangyo Kk Diesel engine fuel injection pipe
US6463909B2 (en) * 2000-01-25 2002-10-15 Usui Kokusai Sangyo Kaisha Limited Common rail
JP3806302B2 (en) * 2000-01-25 2006-08-09 臼井国際産業株式会社 Common rail
JP3558008B2 (en) * 2000-06-08 2004-08-25 トヨタ自動車株式会社 Fuel injection device
DE10212876A1 (en) * 2002-03-22 2003-10-23 Bosch Gmbh Robert Device for vibration damping in fuel injection systems with a high-pressure plenum
EP1359318A1 (en) * 2002-04-16 2003-11-05 Robert Bosch Gmbh High pressure fuel accumulator having improved damping properties
JP2004027964A (en) * 2002-06-25 2004-01-29 Aisin Seiki Co Ltd Fuel supply device for vehicle
DE10344898A1 (en) * 2003-09-26 2005-04-21 Bosch Gmbh Robert Component of a fuel injection device for an internal combustion engine and fuel injection device
DE202004019820U1 (en) 2004-12-23 2006-04-27 Robert Bosch Gmbh Fuel injection device for a diesel engine

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DE102005026993A1 (en) 2006-12-14
EP1893867A1 (en) 2008-03-05
JP2008542624A (en) 2008-11-27
DE502006007266D1 (en) 2010-08-05
WO2006131420A1 (en) 2006-12-14

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