EP1896720A1 - High-pressure accumulator chamber with integrated throttle and filter element - Google Patents

High-pressure accumulator chamber with integrated throttle and filter element

Info

Publication number
EP1896720A1
EP1896720A1 EP06754990A EP06754990A EP1896720A1 EP 1896720 A1 EP1896720 A1 EP 1896720A1 EP 06754990 A EP06754990 A EP 06754990A EP 06754990 A EP06754990 A EP 06754990A EP 1896720 A1 EP1896720 A1 EP 1896720A1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel
filter element
throttle
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
EP06754990A
Other languages
German (de)
French (fr)
Other versions
EP1896720B1 (en
Inventor
Markus Degn
Horst Rosenkranz
Peter Thurner
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 EP1896720A1 publication Critical patent/EP1896720A1/en
Application granted granted Critical
Publication of EP1896720B1 publication Critical patent/EP1896720B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a fuel injection device according to the preamble of claim 1.
  • the DE 20 2004 019 820.7 relates to a fuel injection device for a diesel engine.
  • the fuel injection device has a plurality of branch pipes, which serve to discharge fuel from a high-pressure fuel accumulator of the fuel injection device.
  • a throttle is mounted, which is embodied by a support member which in turn is fixed in the region of the connection head by fixing, which are formed with the upsetting of a connection head on the branch pipe and narrow a width of the branch pipe on both sides of the support element ,
  • the throttle element is embodied in the carrier element as a through-bore with a first partial bore and a second partial bore, wherein the carrier element has a substantially cylindrical lateral surface.
  • DE 100 60 785 A1 relates to a fuel injection device with a high-pressure fuel accumulator.
  • branch pipes are screwed, each containing a throttle for reducing pressure pulsations in the fuel injection device.
  • the throttles are each formed as a pipe piece disposed at one end of the branch pipe to which a connection head is attached or inside the branch pipe near that end.
  • Throttle elements in high-pressure accumulators are used for pressure wave attenuation within the high-pressure accumulator body.
  • cylindrical throttle pieces in connection bores of the high-pressure accumulator which lead to the individual fuel injectors or to the high-pressure accumulator acting on the high-pressure pump, pressed.
  • the throttle elements pressed into the connection bores serve to improve the damping of pressure oscillations within the fuel injection system and thereby enable an increase in the pressure resistance of the individual components.
  • Object of the present invention is to provide a fuel injection system, in particular a Hochdruck umaneinspritzsy system, in which the integrated into the individual high-pressure supply lines to the fuel injectors bar filter can be omitted.
  • the filter element embodied as a screen filter with the press-fit throttle element and thereby to replace the bar filter, which is currently located directly in front of the fuel injector in the high-pressure feed line according to the solutions known from the prior art.
  • the inventively proposed Einpressdrosselelement with integrated filter can be designed both as a single-stage throttle and as a two-stage throttle.
  • a through hole with a constant bore diameter or a stepped bore with a first throttle section and a second throttle section can be introduced into a throttle element carrier.
  • connection of the components can, for example by means of a cohesive joining method, such as soldering, can be achieved.
  • the carrier element in which the single-stage press-fit throttle is formed either as a through-bore or as a stepped through-bore forming two throttle sections, has a sieve filter integrated therewith Filter element is pressed into the respective connection holes of the high-pressure feed lines of the fuel injectors.
  • This makes it possible to ensure that the filter element projecting into the cavity of the high pressure reservoir (common rail) optimally fulfills its filter function and, because of the depth of immersion of the filter element in the cavity of the high pressure reservoir (common rail), ensures that all of the peripheral surfaces of a
  • cylindrically shaped filter element executed fine Filteröffhungen be acted upon by the fuel under extreme pressure.
  • the entire peripheral surface of the filter element for filtering the fuel is available.
  • the carrier body of the one- or two-stage formable press-fit throttle is preferably pressed into the wall of the high pressure storage space, whereby a frictional connection between the support body, which is also preferably cylindrical, and the bore wall of the connection bore in the wall of the high pressure storage space (common rail) is achieved.
  • the connecting pieces on which the individual high-pressure feed lines leading to the fuel injectors are connected can be placed on the outer lateral surface of the high-pressure storage chamber (common rail).
  • a centering surface for the connecting pieces in the region of the connecting bores, in which the Einpressdrossel is embedded with integrated filter element, are formed.
  • the fittings which are also referred to as high-pressure fittings, can be welded to the outer lateral surface of the high-pressure reservoir (common rail). This makes it possible to achieve a high-pressure-tight connection of the connection bore with the high-pressure line to the individual fuel injectors.
  • FIG. 1 shows a cross section through a high-pressure storage space according to the prior art
  • Figure 2 shows a section according to the section line II-II in Figure 1 and 3 shows a high-pressure storage space in which the inventively proposed Einpressdrosselelement is incorporated with an integrated filter element.
  • Figure 1 is a cross section of a known from the prior art high-pressure accumulator space (common rail) with connector to remove.
  • a fuel injection device comprises a high-pressure storage chamber 10, which is tubular.
  • a high-pressure storage chamber 10 which is tubular.
  • the one cavity 12 of the high-pressure accumulator chamber 10 (common rail) acting on the high pressure pump and the individual from the high-pressure accumulator 10 (common rail) pressurize fuel injectors are not shown.
  • High-pressure lines 18 connect the fuel injectors and the high-pressure pump to the high-pressure reservoir 10.
  • the high-pressure storage space 10 comprises a wall 14 which delimits a hollow space 12 running perpendicular to the plane of the drawing according to FIG.
  • the outer circumferential surface of the wall 14 is identified by reference numeral 16.
  • In the wall 14 of the high pressure storage chamber 10 are individual connection bores 24, in which a throttle element 28 is integrated.
  • the throttle element 28 protrudes with its a boundary surface 30 of the cavity 12 facing side into the cavity 12 of the high-pressure accumulator chamber 10 into it.
  • connection piece 18 On the outer circumferential surface 16 are in the region of the individual connection bores 24 connecting pieces 18 added.
  • the connecting piece 18 shown in FIG. 1 comprises an external thread 20, to which the high-pressure line 21, which is connected to the fuel injector, which is not shown, under high pressure, is fastened in a pressure-tight manner.
  • the flow cross section within the connector 18 is indicated by reference numeral 22.
  • the connecting bore 24 introduced into the wall 14 of the high-pressure storage chamber 10 passes above the throttle element 28 into a connection cone 26, to which the high-pressure line 21 is connected to the fuel injector or to the high-pressure pump.
  • the flow direction of the fuel to the fuel injector, not shown in Figure 1 is indicated by reference numeral 32.
  • the high-pressure line 21 has, at its end facing the high-pressure reservoir 10, a collar 23 which is pressed into the connection cone 26 in a pressure-tight manner after tightening a union nut 19, thereby producing a pressure-tight connection of the high-pressure line 21 to the high-pressure reservoir 10.
  • the illustration according to FIG. 2 shows a section according to the section line II-II in FIG.
  • the contact surface 34 lies in a depression 36 in the wall 14 of the high-pressure reservoir 10.
  • the connection piece 18, which is also referred to as a high-pressure fitting, is fastened to the contact surface 34, for example by means of a materially bonded connection, for example by soldering or by welding. connected to the outer circumferential surface 16, or the bottom of the recess 36 in the wall 14 of the high-pressure storage space 10.
  • FIG. 3 shows the press-in throttle element with integrated filter element proposed according to the invention.
  • An injection throttle element 40 shown in FIG. 3 comprises a throttle element carrier 50, which is preferably cylindrical.
  • a filter element 44 is integrated, which is preferably designed as a sieve filter.
  • the filter element 44 comprises a lateral surface 48, which contains a multiplicity of smallest screen holes 46.
  • the filter element 44 integrated into the throttle element carrier 50 protrudes into the cavity 12 of the high-pressure storage chamber 10 in an immersion depth 54. Due to the high pressure level generated in the cavity 12 of the high-pressure storage chamber 10 by the high-pressure pump, any impurities that may be contained in the fuel are forced through the very small diameter screen holes 46 on the lateral surface 48 of the filter element 44 and crushed in this way.
  • the throttle element carrier 50 shown in FIG. 3 can have both a single-stage throttle and the stepped throttle shown in FIG.
  • the stepped throttle within the throttle element carrier 50 is characterized by a first throttle portion 58, which connects directly to the filter element 44 and a second throttle portion 60.
  • the first throttle section 58 has a smaller diameter than the second throttle section 60 in the throttle element carrier 50.
  • the immersion depth 54 of the filter element 44 into the cavity 12 of the high-pressure storage chamber 10 is selected so that all sieve holes 46 on the lateral surface 48 of the filter element 44 are acted upon by the contained in the cavity 12 of the high pressure accumulator 10, under very high pressure fuel.
  • the front side of the filter element 44 which projects into the cavity 12 of the high-pressure reservoir 10 (common rail), is identified by reference numeral 56.
  • the arrangement of the filter element 44 which is integrated in the throttle element carrier 50 as shown in Figure 3 causes due to the prevailing in the cavity 12 of the high-pressure accumulator 10, very high pressure levels particles through the Sieblö- rather 46 in the lateral surface 48 of the filter element 44 are pressed, pass through the one or two-stage Einpressdrosselelement 40 and thus clogging of the projecting into the cavity 12 filter element 44 is effectively prevented.
  • the Einpressdrosselelement 40 whether one or two stages formed, is received in the throttle element carrier 50, which is preferably cylindrical.
  • connection bore 24 merges in the direction of a shoulder surface 52 on the outer circumferential surface 16 of the high-pressure reservoir 10 into the connecting cone 26.
  • the trained on the outer circumferential surface 16 of the high-pressure accumulator chamber 10 approach surface 52 serves as a centering or mounting surface for the connector 18, also referred to as high-pressure fitting.
  • the connecting piece 18 and the high-pressure reservoir 10 can be secured by way of a high-pressure-resistant, preferably cohesively formed connection.
  • connection bore 24 Due to the non-positively introduced into the connection bore 24 throttle element support 50, the connection bore 24 is sealed against crawling of fuel between the lateral surface of the throttle element support 50 and the bore surface of the connection bore 24, so that einschmanende in the high-pressure line 21 fuel for passage of in the Einpressdrossel 40 integrated filter element 44 is forced. As a result, in turn, the entire amount of fuel entering the high-pressure line 21 is filtered.
  • the integration of a rod filter in the high-pressure line leading to the fuel injector and the arrangement of this rod filter immediately before the fuel injector is dispensable.

Abstract

The invention relates to a fuel injection system for an internal combustion engine. Said fuel injection system comprises a high-pressure accumulator chamber (10) with a plurality of connecting bores (24) for discharging fuel from or for supplying fuel to the high-pressure accumulator chamber (10). High-pressure feed lines leading to the fuel injectors or a supply line from a high-pressure source are connected to these bores via connecting pieces (18). Every high-pressure feed line leading to the fuel injectors is associated with a throttle element support (50) which comprises a one- or multi-stage throttle element (28, 40). The throttle elements (40) are configured as press-fit throttles the throttle element supports (50) of which comprise a filter element (44) facing the fuel accumulator chamber (10).

Description

Hochdruckspcichcrraum mit integriertem Drossel- und FilterelementHigh-pressure scrub chamber with integrated throttle and filter element
Die Erfindung bezieht sich auf eine Kraftstoffeinspritzeinrichtung gemäß des Oberbegriffes des Patentanspruches 1.The invention relates to a fuel injection device according to the preamble of claim 1.
Stand der TechnikState of the art
DE 20 2004 019 820.7 bezieht sich auf eine Kraftstoffeinspritzeinrichtung für einen Dieselmotor. Die Kraftstoffeinspritzeinrichtung weist mehrere Abzweigrohre auf, die der Kraftstoffabfuhr aus einem Kraftstoffhochdruckspeicher der Kraftstoffeinspritzeinrichtung die- nen. In jedem dieser Abzweigrohre ist eine Drossel angebracht, die durch ein Trägerelement verkörpert ist, welches seinerseits durch Fixierelemente, die mit dem Anstauchen eines Anschlusskopfes an dem Abzweigrohr herausgebildet werden und die eine lichte Weite des Abzweigrohres beidseits des Trägerelementes einengen, im Bereich des Anschlusskopfes fixiert ist. Das Drosselelement ist in dem Trägerelement als eine Durchgangsbohrung mit einer ersten Teilbohrung und einer zweiten Teilbohrung ausgeführt, wobei das Trägerelement eine im Wesentlichen zylindrische Mantelfläche aufweist.DE 20 2004 019 820.7 relates to a fuel injection device for a diesel engine. The fuel injection device has a plurality of branch pipes, which serve to discharge fuel from a high-pressure fuel accumulator of the fuel injection device. In each of these branch pipes, a throttle is mounted, which is embodied by a support member which in turn is fixed in the region of the connection head by fixing, which are formed with the upsetting of a connection head on the branch pipe and narrow a width of the branch pipe on both sides of the support element , The throttle element is embodied in the carrier element as a through-bore with a first partial bore and a second partial bore, wherein the carrier element has a substantially cylindrical lateral surface.
DE 100 60 785 Al bezieht sich auf eine Kraftstoffeinspritzeinrichtung mit einem Kraftstoffhochdruckspeicher. An dem Kraftstoffhochdruckspeicher sind Abzweigrohre anschraubbar, die jeweils eine Drossel zum Abbau von Druckpulsationen in der Kraftstoffeinspritzeinrichtung enthalten. Die Drosseln sind jeweils als ein Rohrstück ausgebildet, das an einem Ende des Abzweigrohres, an dem ein Anschlusskopf angebracht ist, oder im Inneren des Abzweigrohres nahe diesem Ende angeordnet ist. Drosselelemente in Hochdruckspeichern (Common Rail) dienen der Druckwellendämpfung innerhalb des Hochdruckspeicherkörpers. Dazu werden zum Beispiel zylindrische Drosselstücke in Anschlussbohrungen des Hochdruckspeichers (Common Rail), die zu den einzelnen Kraftstoffinjektoren oder auch zu der den Hochdruckspeicher beaufschlagenden Hochdruckpumpe führen, eingepresst. Die in die Anschlussbohrungen eingepressten Drosselelemente dienen einer Verbesserung der Dämpfung von Druckschwingungen innerhalb des Kraftstoffeinspritzsystems und ermöglichen dadurch eine Steigerung der Druckfestigkeit der einzelnen Komponenten.DE 100 60 785 A1 relates to a fuel injection device with a high-pressure fuel accumulator. At the fuel high-pressure accumulator branch pipes are screwed, each containing a throttle for reducing pressure pulsations in the fuel injection device. The throttles are each formed as a pipe piece disposed at one end of the branch pipe to which a connection head is attached or inside the branch pipe near that end. Throttle elements in high-pressure accumulators (common rail) are used for pressure wave attenuation within the high-pressure accumulator body. For this purpose, for example, cylindrical throttle pieces in connection bores of the high-pressure accumulator (common rail), which lead to the individual fuel injectors or to the high-pressure accumulator acting on the high-pressure pump, pressed. The throttle elements pressed into the connection bores serve to improve the damping of pressure oscillations within the fuel injection system and thereby enable an increase in the pressure resistance of the individual components.
Bei bisherigen Ausführungsvarianten von Hochdruckeinspritzsystemen mit Hochdruckspeicherraum (Common Rail) ist es Stand der Technik, dass vor den jeweiligen Kraftstoffinjektoren, über welche der hoch verdichtete Kraftstoff in die Brennräume der Verbrennungs- kraftmaschine eingespritzt wird, Stabfilter angeordnet sind. Die unmittelbar vor den einzelnen Kraftstoffinjektoren angeordneten Stabfilter haben die Aufgabe, Mischanteile aus dem Kraftstoff beziehungsweise feste ungelöste Teilchen abzutrennen. Stabfilter, die lasergebohrte Löcher aufweisen, werden bei Hochdruckspeichereinspritzsystemen zum Filtern von verschiedenen Partikeln aus dem Kraftstoff eingesetzt.In previous embodiments of high-pressure injection systems with high-pressure reservoir (common rail), it is state of the art that in front of the respective fuel injectors, via which the highly compressed fuel into the combustion chambers of the combustion engine is injected, bar filters are arranged. The rod filters arranged directly in front of the individual fuel injectors have the task of separating off mixed components from the fuel or solid undissolved particles. Bar filters having laser drilled holes are used in high pressure accumulator injection systems to filter different particles from the fuel.
Darstellung der ErfindungPresentation of the invention
Aufgabe der vorliegenden Erfindung ist es, eine Kraftstoffeinspritzeinrichtung, insbesondere ein Hochdruckspeichereinspritzsy stem bereitzustellen, bei welchem die in die einzelnen Hochdruckzuleitungen zu den Kraftstoffinjektoren integrierten Stabfilter entfallen können.Object of the present invention is to provide a fuel injection system, in particular a Hochdruckspeichereinspritzsy system, in which the integrated into the individual high-pressure supply lines to the fuel injectors bar filter can be omitted.
Der erfindungsgemäß vorgeschlagenen Lösung folgend wird dies dadurch erreicht, dass zur Dämpfung von Druckpulsationen innerhalb des Hochdruckspeichereinspritzsystems in An- schlussbohrungen des Hochdruckspeichers Einpressdrosselelemente mit einem integrierten Filterelement eingebracht werden. Durch den im Hochdruckspeicher herrschenden hohen Druck können eventuell im Kraftstoff verbliebene Partikel, wie zum Beispiel Rückstände aus dem Kraftstofftank, zerkleinert werden, indem sie durch die feinen Löcher des als Siebfilter ausgebildeten Filterelementes gedrückt werden. Dadurch kann ein Verstopfen des FiI- terelementes vermieden werden. Erfindungsgemäß wird vorgeschlagen, das als Siebfilter ausgebildete Filterelement mit dem Einpressdrosselelement zu kombinieren und dadurch den Stabfilter, welcher sich gemäß des aus dem Stand der Technik bekannten Lösungen zur Zeit direkt vor dem Kraftstoffinjektor in der Hochdruckzuleitung befindet, zu ersetzen. Mit dieser Lösung lässt sich eine erhebliche Senkung der Produktionskosten erreichen.Following the solution proposed according to the invention, this is achieved in that, for damping pressure pulsations within the high-pressure accumulator injection system, injection-throttle elements with an integrated filter element are introduced into connection bores of the high-pressure accumulator. Due to the high pressure prevailing in the high-pressure accumulator, any particles remaining in the fuel, for example residues from the fuel tank, can be comminuted by being forced through the fine holes of the filter element designed as a sieve filter. As a result, clogging of the filter element can be avoided. According to the invention, it is proposed to combine the filter element embodied as a screen filter with the press-fit throttle element and thereby to replace the bar filter, which is currently located directly in front of the fuel injector in the high-pressure feed line according to the solutions known from the prior art. With this solution, a significant reduction in production costs can be achieved.
Das erfindungsgemäß vorgeschlagene Einpressdrosselelement mit integriertem Filter kann sowohl als einstufig wirkende Drossel als auch als zweistufige Drossel ausgebildet sein. Je nach Ausführungsvariante können in einen Drosselelement-Träger entweder eine Durchgangsbohrung mit konstantem Bohrungsdurchmesser oder auch eine abgestufte Bohrung mit einem ersten Drosselabschnitt und einem zweiten Drosselabschnitt eingebracht werden.The inventively proposed Einpressdrosselelement with integrated filter can be designed both as a single-stage throttle and as a two-stage throttle. Depending on the embodiment, either a through hole with a constant bore diameter or a stepped bore with a first throttle section and a second throttle section can be introduced into a throttle element carrier.
Die Verbindung der Bauteile, das heißt des Filterelementes und des Einpressdrosselelementes kann, zum Beispiel im Wege eines stoffschlüssigen Fügeverfahrens, wie zum Beispiel des Lötens, erreicht werden.The connection of the components, that is the filter element and the Einpressdrosselelementes can, for example by means of a cohesive joining method, such as soldering, can be achieved.
Mit der vorgeschlagenen Lösung lassen sich insbesondere montagetechnische Vorteile dahingehend erreichen, dass das Trägerelement, in welchem die einstufige Einpressdrossel entweder als eine Durchgangsbohrung oder als eine zwei Drosselabschnitte bildende gestufte Durchgangsbohrung ausgebildet wird, mit daran integriertem als Siebfilter ausgebildeten Filterelement in die jeweiligen Anschlussbohrungen der Hochdruckzuleitungen der Kraftstoffinjektoren eingepresst wird. Dadurch lässt sich erreichen, dass sichergestellt ist, dass das in den Hohlraum des Hochdruckspeicherraumes (Common Rail) ragende Filterelement seine Filterfunktion optimal erfüllt und aufgrund der Eintauchtiefe des Filterelementes in den Hohlraum des Hochdruckspeicherraumes (Common Rail) sichergestellt ist, dass sämtliche an der Umfangsfläche eines zum Beispiel zylindrisch ausgebildeten Filterelementes ausgeführten feinen Filteröffhungen mit dem unter Höchstdruck stehenden Kraftstoff beaufschlagt werden. Damit ist die gesamte Umfangsfläche des Filterelementes zur Filterung des Kraftstoffes nutzbar.With the proposed solution, assembly advantages in particular can be achieved in that the carrier element, in which the single-stage press-fit throttle is formed either as a through-bore or as a stepped through-bore forming two throttle sections, has a sieve filter integrated therewith Filter element is pressed into the respective connection holes of the high-pressure feed lines of the fuel injectors. This makes it possible to ensure that the filter element projecting into the cavity of the high pressure reservoir (common rail) optimally fulfills its filter function and, because of the depth of immersion of the filter element in the cavity of the high pressure reservoir (common rail), ensures that all of the peripheral surfaces of a For example, cylindrically shaped filter element executed fine Filteröffhungen be acted upon by the fuel under extreme pressure. Thus, the entire peripheral surface of the filter element for filtering the fuel is available.
Der Trägerkörper der ein- oder zweistufige ausbildbaren Einpressdrossel wird bevorzugt in die Wand des Hochdruckspeicherraumes eingepresst, wodurch eine kraftschlüssige Verbindung zwischen dem Trägerkörper, der ebenfalls bevorzugt zylindrisch ausgebildet ist, und der Bohrungswandung der Anschlussbohrung in der Wand des Hochdruckspeicherraumes (Common Rail) erreicht wird.The carrier body of the one- or two-stage formable press-fit throttle is preferably pressed into the wall of the high pressure storage space, whereby a frictional connection between the support body, which is also preferably cylindrical, and the bore wall of the connection bore in the wall of the high pressure storage space (common rail) is achieved.
Die erfindungsgemäß vorgeschlagene Lösung kann sowohl in einem Schmiede-Rail (WFR- Rail = Warm Forged Rail) als auch in einem LWR-Rail, d. h. in einem lasergeschweißten Hochdruckspeicher zum Einsatz kommen. An der Außenmantelfläche des Hochdruckspei- cherraumes (Common Rail) können die Anschlussstücke, an denen die einzelnen zu den Kraftstoffinjektoren führenden Hochdruckzuleitungen angeschlossen werden, platziert werden. Dazu kann eine Zentrierfläche für die Anschlussstücke im Bereich der Anschlussbohrungen, in welche die Einpressdrossel mit integriertem Filterelement eingelassen ist, ausgebildet werden. Die Anschlussstücke, die auch als Hochdruckfitting bezeichnet werden, kön- nen an der Außenmantelfläche des Hochdruckspeicherraumes (Common Rail) verschweißt werden. Dadurch lässt sich eine hochdruckdichte Verbindung der Anschlussbohrung mit der Hochdruckleitung zu den einzelnen Kraftstoffinjektoren erreichen.The solution proposed according to the invention can be implemented both in a forged rail (WFR rail = Warm Forged Rail) and in an LWR rail, ie. H. be used in a laser-welded high-pressure accumulator. The connecting pieces on which the individual high-pressure feed lines leading to the fuel injectors are connected can be placed on the outer lateral surface of the high-pressure storage chamber (common rail). For this purpose, a centering surface for the connecting pieces in the region of the connecting bores, in which the Einpressdrossel is embedded with integrated filter element, are formed. The fittings, which are also referred to as high-pressure fittings, can be welded to the outer lateral surface of the high-pressure reservoir (common rail). This makes it possible to achieve a high-pressure-tight connection of the connection bore with the high-pressure line to the individual fuel injectors.
Zeichnungdrawing
Anhand der Zeichnung wird die Erfindung nachstehend näher erläutert.Reference to the drawings, the invention will be explained in more detail below.
Es zeigt:It shows:
Figur 1 einen Querschnitt durch einen Hochdruckspeicherraum gemäß des Standes der Technik,1 shows a cross section through a high-pressure storage space according to the prior art,
Figur 2 einen Schnitt gemäß des Schnittverlaufes II-II in Figur 1 und Figur 3 einen Hochdruckspeicherraum, in welchem das erfindungsgemäß vorgeschlagene Einpressdrosselelement mit integriertem Filterelement eingebracht ist.Figure 2 shows a section according to the section line II-II in Figure 1 and 3 shows a high-pressure storage space in which the inventively proposed Einpressdrosselelement is incorporated with an integrated filter element.
AusfuhrungsbeispieleExemplary embodiments
Figur 1 ist ein Querschnitt eines aus dem Stand der Technik bekannten Hochdruckspeicherraums (Common Rail) mit Anschlussstück zu entnehmen.Figure 1 is a cross section of a known from the prior art high-pressure accumulator space (common rail) with connector to remove.
Wie aus Figur 1 hervorgeht, umfasst eine Kraftstoffeinspritzeinrichtung einen Hochdruck- Speicherraum 10, der rohrförmig ausgebildet ist. Im in Figur 1 dargestellten Querschnitt sind die einen Hohlraum 12 des Hochdruckspeicherraumes 10 (Common Rail) beaufschlagende Hochdruckpumpe sowie die einzelnen vom Hochdruckspeicherraum 10 (Common Rail) beaufschlagen Kraftstoffinjektoren nicht dargestellt. Hochdruckleitungen 18 verbinden die Kraftstoffinjektoren sowie die Hochdruckpumpe mit dem Hochdruckspeicherraum 10.As can be seen from FIG. 1, a fuel injection device comprises a high-pressure storage chamber 10, which is tubular. In the cross section shown in Figure 1, the one cavity 12 of the high-pressure accumulator chamber 10 (common rail) acting on the high pressure pump and the individual from the high-pressure accumulator 10 (common rail) pressurize fuel injectors are not shown. High-pressure lines 18 connect the fuel injectors and the high-pressure pump to the high-pressure reservoir 10.
Der Hochdruckspeicherraum 10 umfasst eine Wand 14, die einen sich senkrecht zur Zeichenebene gemäß Figur 1 verlaufenden Hohlraum 12 begrenzt. Die Außenmantelfläche der Wand 14 ist mit Bezugszeichen 16 gekennzeichnet. In der Wand 14 des Hochdruckspeicherraumes 10 befinden sich einzelnen Anschlussbohrungen 24, in welche ein Drosselele- ment 28 integriert ist. Das Drosselelement 28 ragt mit seinem einer Begrenzungsfläche 30 des Hohlraumes 12 zuweisenden Seite in den Hohlraum 12 des Hochdruckspeicherraumes 10 hinein.The high-pressure storage space 10 comprises a wall 14 which delimits a hollow space 12 running perpendicular to the plane of the drawing according to FIG. The outer circumferential surface of the wall 14 is identified by reference numeral 16. In the wall 14 of the high pressure storage chamber 10 are individual connection bores 24, in which a throttle element 28 is integrated. The throttle element 28 protrudes with its a boundary surface 30 of the cavity 12 facing side into the cavity 12 of the high-pressure accumulator chamber 10 into it.
An der Außenmantelfläche 16 sind im Bereich der einzelnen Anschlussbohrungen 24 An- Schlussstücke 18 aufgenommen. Das in Figur 1 dargestellte Anschlussstück 18 umfasst ein Außengewinde 20, an welchem die zu dem nicht dargestellten Kraftstoffinjektor führende mit unter hohem Druck stehende Kraftstoff beaufschlagte Hochdruckleitung 21 druckdicht befestigt wird. Der Strömungsquerschnitt innerhalb des Anschlussstückes 18 ist durch Bezugszeichen 22 gekennzeichnet. Die in die Wand 14 des Hochdruckspeicherraumes 10 ein- gebrachte Anschlussbohrung 24 geht oberhalb des Drosselelementes 28 in einen Anschlusskegel 26 über, an welchem die Hochdruckleitung 21 zum Kraftstoffinjektor oder zur Hochdruckpumpe angeschlossen ist. Die Strömungsrichtung des Kraftstoffes zum in Figur 1 nicht dargestellten Kraftstoffinjektor ist durch Bezugszeichen 32 angedeutet. Die Hochdruckleitung 21 weist an ihrem dem Hochdruckspeicherraum 10 zuweisenden Ende einen Bund 23 auf, der nach Anziehen einer Überwurfmutter 19 druckdicht in den Anschlusskegel 26 ein- gepresst wird, wodurch ein druckdichter Anschluss der Hochdruckleitung 21 am Hochdruckspeicherraum 10 entsteht. Aus der Darstellung gemäß Figur 2 geht ein Schnitt gemäß des Schnittverlaufes II-II in Figur 1 hervor.On the outer circumferential surface 16 are in the region of the individual connection bores 24 connecting pieces 18 added. The connecting piece 18 shown in FIG. 1 comprises an external thread 20, to which the high-pressure line 21, which is connected to the fuel injector, which is not shown, under high pressure, is fastened in a pressure-tight manner. The flow cross section within the connector 18 is indicated by reference numeral 22. The connecting bore 24 introduced into the wall 14 of the high-pressure storage chamber 10 passes above the throttle element 28 into a connection cone 26, to which the high-pressure line 21 is connected to the fuel injector or to the high-pressure pump. The flow direction of the fuel to the fuel injector, not shown in Figure 1 is indicated by reference numeral 32. The high-pressure line 21 has, at its end facing the high-pressure reservoir 10, a collar 23 which is pressed into the connection cone 26 in a pressure-tight manner after tightening a union nut 19, thereby producing a pressure-tight connection of the high-pressure line 21 to the high-pressure reservoir 10. The illustration according to FIG. 2 shows a section according to the section line II-II in FIG.
Der Darstellung gemäß Figur 2 ist entnehmbar, dass das mit dem Außengewinde 20 verse- hene Anschlussstück 18 an einer Kontaktfläche 34 die Außenmantelfläche 16 des Hochdruckspeicherraumes 10 berührt. Die Kontaktfläche 34 liegt in einer Vertiefung 36 in der Wand 14 des Hochdruckspeicherraums 10. Das Anschlussstück 18, welches auch als Hoch- druckfitting bezeichnet wird, wird an der Kontaktfläche 34 beispielsweise im Wege einer stoffschlüssig erzeugten Verbindung, zum Beispiel durch Löten oder durch Schweißen, mit der Außenmantelfläche 16, beziehungsweise dem Boden der Vertiefung 36 in der Wand 14 des Hochdruckspeicherraumes 10 verbunden.It can be seen from the representation according to FIG. 2 that the connecting piece 18, which is provided with the external thread 20, touches the outer circumferential surface 16 of the high-pressure storage chamber 10 at a contact surface 34. The contact surface 34 lies in a depression 36 in the wall 14 of the high-pressure reservoir 10. The connection piece 18, which is also referred to as a high-pressure fitting, is fastened to the contact surface 34, for example by means of a materially bonded connection, for example by soldering or by welding. connected to the outer circumferential surface 16, or the bottom of the recess 36 in the wall 14 of the high-pressure storage space 10.
Der Darstellung gemäß Figur 3 ist das erfindungsgemäß vorgeschlagene Einpressdrosselelement mit integriertem Filterelement zu entnehmen.The illustration according to FIG. 3 shows the press-in throttle element with integrated filter element proposed according to the invention.
Ein in Figur 3 dargestelltes Einpressdrosselelement 40 umfasst einen Drosselelement-Träger 50, der vorzugsweise zylindrisch ausgebildet ist. In den Drosselelement-Träger 50 ist ein Filterelement 44 integriert, welcher bevorzugt als Siebfilter ausgebildet ist. Das Filterelement 44 umfasst eine Mantelfläche 48, die eine Vielzahl kleinster Sieblöcher 46 enthält. Das in den Drosselelement-Träger 50 integrierte Filterelement 44 ragt in einer Eintauchtiefe 54 in den Hohlraum 12 des Hochdruckspeicherraumes 10 hinein. Aufgrund des durch die Hochdruckpumpe erzeugten hohen Druckniveaus im Hohlraum 12 des Hochdruckspeicherraumes 10 werden eventuell in den Hochdruckspeicherraum 10 geförderte Verunreinigungen, die im Kraftstoff enthalten sein können, durch die in sehr kleinem Durchmesser ausge- bildeten Sieblöcher 46 an der Mantelfläche 48 des Filterelementes 44 gedrückt und auf diese Weise zerkleinert.An injection throttle element 40 shown in FIG. 3 comprises a throttle element carrier 50, which is preferably cylindrical. In the throttle element carrier 50, a filter element 44 is integrated, which is preferably designed as a sieve filter. The filter element 44 comprises a lateral surface 48, which contains a multiplicity of smallest screen holes 46. The filter element 44 integrated into the throttle element carrier 50 protrudes into the cavity 12 of the high-pressure storage chamber 10 in an immersion depth 54. Due to the high pressure level generated in the cavity 12 of the high-pressure storage chamber 10 by the high-pressure pump, any impurities that may be contained in the fuel are forced through the very small diameter screen holes 46 on the lateral surface 48 of the filter element 44 and crushed in this way.
Der in Figur 3 dargestellte Drosselelement-Träger 50 kann sowohl eine einstufig wirkende Drossel aufweisen, als auch die in Figur 3 dargestellte gestufte Drossel. Die gestufte Drossel innerhalb des Drosselelement-Trägers 50 ist durch einen ersten Drosselabschnitt 58, der sich unmittelbar an das Filterelement 44 anschließt sowie einen zweiten Drosselabschnitt 60 gekennzeichnet. Im hier dargestellten Ausführungsbeispiel weist der erste Drosselabschnitt 58 einen geringeren Durchmesser auf als der zweite Drosselabschnitt 60 im Drosselelement- Träger 50. Die Eintauchtiefe 54 des Filterelementes 44 in den Hohlraum 12 des Hochdruck- Speicherraumes 10 wird so gewählt, dass sämtliche Sieblöcher 46 an der Mantelfläche 48 des Filterelementes 44 durch den im Hohlraum 12 des Hochdruckspeicherraumes 10 enthaltenen, unter sehr hohem Druck stehenden Kraftstoff beaufschlagt sind. Die Stirnseite des Filterelementes 44, welches in den Hohlraum 12 des Hochdruckspeicherraumes 10 (Com- mon Rail) hineinragt, ist durch Bezugszeichen 56 gekennzeichnet. Die Anordnung des Filterelementes 44, welches in den Drosselelement-Träger 50 integriert ist gemäß der Darstellung in Figur 3 bewirkt, dass aufgrund des im Hohlraum 12 des Hochdruckspeicherraumes 10 herrschenden, sehr hohen Druckniveaus Partikel durch die Sieblö- eher 46 in der Mantelfläche 48 des Filterelementes 44 gedrückt werden, das ein- oder zweistufig ausgebildete Einpressdrosselelement 40 passieren und somit ein Verstopfen des in den Hohlraum 12 hineinragenden Filterelementes 44 wirksam unterbunden wird. Das Einpressdrosselelement 40, sei es ein- oder zweistufig ausgebildet, wird in dem Drosselelement- Träger 50 aufgenommen, der bevorzugt zylinderförmig ausgebildet ist. Die Anschlussboh- rung 24 geht in Richtung auf eine Ansatzfläche 52 an der Außenmantelfläche 16 des Hochdruckspeicherraumes 10 in den Anschlusskegel 26 über. Die an der Außenmantelfläche 16 des Hochdruckspeicherraumes 10 ausgebildete Ansatzfläche 52 dient als eine Zentrier- oder Montagefläche für das Anschlussstück 18, auch als Hochdruckfitting bezeichnet. An der Kontaktfläche 34 zwischen der unteren Stirnseite des Anschlussstückes 18 mit Außenge- winde 20 und der Außenmantelfläche 16 des Hochdruckspeicherraumes 10, können das Anschlussstück 18 und der Hochdruckspeicherraum 10 im Wege einer hochdruckfesten, bevorzugt stoffschlüssig ausgebildeten Verbindung befestigt werden. Aufgrund des kraftschlüssig in die Anschlussbohrung 24 eingebrachten Drosselelement-Trägers 50 ist die Anschlussbohrung 24 gegen ein Unterkriechen von Kraftstoff zwischen der Mantelfläche des Drosselelement-Trägers 50 und der Bohrungsfläche der Anschlussbohrung 24 abgedichtet, so dass der in die Hochdruckleitung 21 einschießende Kraftstoff zur Passage des in die Einpressdrossel 40 integrierten Filterelementes 44 gezwungen ist. Dadurch wiederum wird die gesamte in die Hochdruckleitung 21 eintretende Kraftstoffmenge gefiltert. Mit der erfindungsgemäß vorgeschlagenen Lösung ist die Integration eines Stabfilters in die zum Kraftstoffinjektor führende Hochdruckleitung und das Anordnung dieses Stabfilters unmittelbar vor dem Kraftstoffinjektor entbehrlich. The throttle element carrier 50 shown in FIG. 3 can have both a single-stage throttle and the stepped throttle shown in FIG. The stepped throttle within the throttle element carrier 50 is characterized by a first throttle portion 58, which connects directly to the filter element 44 and a second throttle portion 60. In the exemplary embodiment illustrated here, the first throttle section 58 has a smaller diameter than the second throttle section 60 in the throttle element carrier 50. The immersion depth 54 of the filter element 44 into the cavity 12 of the high-pressure storage chamber 10 is selected so that all sieve holes 46 on the lateral surface 48 of the filter element 44 are acted upon by the contained in the cavity 12 of the high pressure accumulator 10, under very high pressure fuel. The front side of the filter element 44, which projects into the cavity 12 of the high-pressure reservoir 10 (common rail), is identified by reference numeral 56. The arrangement of the filter element 44, which is integrated in the throttle element carrier 50 as shown in Figure 3 causes due to the prevailing in the cavity 12 of the high-pressure accumulator 10, very high pressure levels particles through the Sieblö- rather 46 in the lateral surface 48 of the filter element 44 are pressed, pass through the one or two-stage Einpressdrosselelement 40 and thus clogging of the projecting into the cavity 12 filter element 44 is effectively prevented. The Einpressdrosselelement 40, whether one or two stages formed, is received in the throttle element carrier 50, which is preferably cylindrical. The connection bore 24 merges in the direction of a shoulder surface 52 on the outer circumferential surface 16 of the high-pressure reservoir 10 into the connecting cone 26. The trained on the outer circumferential surface 16 of the high-pressure accumulator chamber 10 approach surface 52 serves as a centering or mounting surface for the connector 18, also referred to as high-pressure fitting. At the contact surface 34 between the lower end face of the connecting piece 18 with external thread 20 and the outer circumferential surface 16 of the high-pressure reservoir 10, the connecting piece 18 and the high-pressure reservoir 10 can be secured by way of a high-pressure-resistant, preferably cohesively formed connection. Due to the non-positively introduced into the connection bore 24 throttle element support 50, the connection bore 24 is sealed against crawling of fuel between the lateral surface of the throttle element support 50 and the bore surface of the connection bore 24, so that einschießende in the high-pressure line 21 fuel for passage of in the Einpressdrossel 40 integrated filter element 44 is forced. As a result, in turn, the entire amount of fuel entering the high-pressure line 21 is filtered. With the proposed solution according to the invention, the integration of a rod filter in the high-pressure line leading to the fuel injector and the arrangement of this rod filter immediately before the fuel injector is dispensable.
BezueszeichenlisteBezueszeichenliste
10 Hochdruckspeicherraum (Common Rail)10 high-pressure storage space (common rail)
12 Hohlraum12 cavity
14 Wand14 wall
16 Außenmantelfläche16 outer circumferential surface
18 Anschlussstück18 connection piece
19 Überwurfmutter19 union nut
20 Außengewinde20 external thread
21 Hochdruckleitung21 high pressure line
22 Strömungsquerschnitt Anschlussstück22 flow cross-section connection piece
23 Bund23 fret
24 Anschlussbohrung24 connection hole
26 Anschlusskegel für Hochdruckleitung26 connection cone for high pressure line
28 Drosselelement28 throttle element
30 Begrenzungsfläche Hohlraum30 boundary surface cavity
32 Strömungsrichtung Kraftstoff zum Kraftstoffinjektor32 Flow direction of fuel to the fuel injector
34 Kontaktfläche Außenmantel 1634 contact surface outer jacket 16
36 Vertiefung Außenmantelfläche 1636 recess outer circumferential surface 16
40 Einpressdrosselelement40 press-fit throttle element
42 Verengung Strömungsquerschnitt42 constriction flow cross section
44 Filterelement44 filter element
46 Sieblöcher46 sieve holes
48 Mantelfläche Filterelement48 lateral surface filter element
50 Drosselelement-Träger50 throttle element carrier
52 Ansatzfläche Anschlussstück 1852 approach surface fitting 18
54 Eintauchtiefe Filterelement 4454 Immersion depth filter element 44
56 Stirnseite Filterelement56 front side filter element
58 erster Drosselabschnitt58 first throttle section
60 zweiter Drosselabschnitt 60 second throttle section

Claims

Patentansprüche claims
1. Kraftstoffeinspritzeinrichtung für eine Verbrennungskraftmaschine mit einem Hochdruckspeicherraum (10) mit mehreren der Kraftstoffabfuhr vom oder der Kraftstoffzu- fuhr zum Hochdruckspeicherraum (10) dienenden Anschlussbohrungen (24), an denenA fuel injector for an internal combustion engine having a high-pressure accumulator (10) with a plurality of the fuel discharge from or the fuel supply to the high-pressure accumulator chamber (10) serving connection bores (24), in which
Hochdruckzuleitungen zu Kraftstoffinjektoren oder Kraftstoffzufuhrleitungen von einer Hochdruckquelle mittels Anschlussstücken (18) angeschlossen werden, wobei den Hochdruckzuleitungen zu den Kraftstoffinjektoren mindestens ein Drosselelement- Träger (50) zugeordnet ist, der ein ein- oder mehrstufig ausgebildetes Drosselelement (28, 24) aufweist, dadurch gekennzeichnet, dass die Drosselelemente (40) als Einpressdrosseln ausgeführt sind, deren Drosselelement-Träger (50) ein dem Kraftstoffspeicherraum (10) zuweisendes Filterelement (44) umfasst.High-pressure supply lines to fuel injectors or fuel supply lines are connected by a high-pressure source by means of connecting pieces (18), the high-pressure feed lines to the fuel injectors at least one Drosselelement- carrier (50) is assigned, which has a one or more stages formed throttle element (28, 24), characterized in that the throttle elements (40) are designed as injection throttles, the throttle element carrier (50) of which comprises a filter element (44) which is assigned to the fuel reservoir (10).
2. Kraftstoffeinspritzeinrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass das Filterelement (44) mit einer Mantelfläche (48) in einer Eintauchtiefe (54) in einen Hohlraum (12) des Hochdruckspeicherraumes (10) hineinragt.2. Fuel injection device according to claim 1, characterized in that the filter element (44) projects with a lateral surface (48) in an immersion depth (54) in a cavity (12) of the high-pressure accumulator chamber (10).
3. Kraftstoffeinspritzeinrichtung gemäß Anspruch 2, dadurch gekennzeichnet, dass an der Mantelfläche (48) des Filterelementes (44) Sieblöcher (46) ausgebildet sind.3. Fuel injection device according to claim 2, characterized in that on the lateral surface (48) of the filter element (44) sieve holes (46) are formed.
4. Kraftstoffeinspritzeinrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass die Sieblöcher (46) an der Mantelfläche (48) des Filterelementes (44) gleichmäßig verteilt ausgeführt sind.4. Fuel injection device according to claim 3, characterized in that the sieve holes (46) on the lateral surface (48) of the filter element (44) are designed to be evenly distributed.
5. Kraftstoffeinspritzeinrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass die Sieblöcher (46) an der Mantelfläche (48) und an einer Stirnseite (56) des Filterelementes (44) angeordnet sind.5. Fuel injection device according to claim 3, characterized in that the sieve holes (46) on the lateral surface (48) and on an end face (56) of the filter element (44) are arranged.
6. Kraftstoffeinspritzeinrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass das Filterelement (44) mit dem Drosselelement-Träger (50) stoffschlüssig oder kraftschlüssig verbunden ist.6. Fuel injection device according to claim 1, characterized in that the filter element (44) is connected to the throttle element carrier (50) cohesively or non-positively.
7. Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass das Filterelement (44) mit dem Drosselelement-Träger (50) verlötet oder verschweißt ist.7. Fuel injection device according to claim 6, characterized in that the filter element (44) with the throttle element carrier (50) is soldered or welded.
8. Kraftstoffeinspritzeinrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass das Drosselelement (40) eine Durchgangsbohrung oder einen ersten Drosselabschnitt (58) sowie einen zweiten Drosselabschnitt (60) zwischen dem Filterelement (44) und einem Diffusorbereich (26) der Anschlussbohrung (24) aufweist. 8. Fuel injection device according to claim 1, characterized in that the throttle element (40) has a through bore or a first throttle portion (58) and a second throttle portion (60) between the filter element (44) and a diffuser region (26) of the connection bore (24) ,
9. Kraftstoffeinspritzeinrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Drosselelement-Träger (50) mit an diesem aufgenommenen Filterelement (44) kraftschlüssig in der Anschlussbohrung (24) aufgenommen ist.9. Fuel injection device according to claim 1, characterized in that the throttle element carrier (50) with this recorded filter element (44) is positively received in the connection bore (24).
10. Verwendung einer Kraftstoffeinspritzeinrichtung gemäß einem oder mehreren der vorstehenden Ansprüche in einem lasergeschweißten Hochdruckspeicherraum (10) oder in einem geschmiedeten Hochdruckspeicherraum (10). 10. Use of a fuel injection device according to one or more of the preceding claims in a laser-welded high-pressure storage space (10) or in a forged high-pressure storage space (10).
EP06754990A 2005-06-10 2006-05-03 High-pressure accumulator chamber with integrated throttle and filter element Not-in-force EP1896720B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005026992A DE102005026992A1 (en) 2005-06-10 2005-06-10 High pressure accumulator with integrated throttle and filter element
PCT/EP2006/062029 WO2006131426A1 (en) 2005-06-10 2006-05-03 High-pressure accumulator chamber with integrated throttle and filter element

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EP1896720A1 true EP1896720A1 (en) 2008-03-12
EP1896720B1 EP1896720B1 (en) 2010-12-01

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JP (1) JP2008542625A (en)
AT (1) ATE490402T1 (en)
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4737013B2 (en) * 2006-02-20 2011-07-27 株式会社デンソー Common rail
DE102007049357A1 (en) 2007-10-15 2009-04-16 Robert Bosch Gmbh Fuel injection device
DE102008044096A1 (en) * 2008-11-27 2010-06-02 Robert Bosch Gmbh Method for producing throttle bores with a low caviation transfer point
DE102010064037A1 (en) 2010-12-23 2012-06-28 Robert Bosch Gmbh Producing functional part having first body from first plastic material and second body from second plastic material, where two bodies are connected to one another and second body is obtained by partly encapsulating or spraying first body
DE102012220491A1 (en) * 2012-11-09 2014-05-15 Robert Bosch Gmbh Fuel injection valve and fuel injection system with a fuel injection valve
DE102015205980A1 (en) * 2015-04-02 2016-10-06 Robert Bosch Gmbh Fuel injection system and hydraulic connection to a fuel injection system
JP6793661B2 (en) * 2015-11-30 2020-12-02 日立オートモティブシステムズ株式会社 Injectors, fuel rails and fuel rail assemblies

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111370A (en) * 1977-04-08 1978-09-05 Caterpillar Tractor Co. Fuel inlet fitting for a fuel injection nozzle
JPS60119364A (en) * 1983-12-02 1985-06-26 Hitachi Ltd Solenoid fuel injection valve
US5297523A (en) * 1993-02-26 1994-03-29 Caterpillar Inc. Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system
AU6945894A (en) * 1993-05-06 1994-12-12 Cummins Engine Company Inc. Compact high performance fuel system with accumulator
JP3503784B2 (en) * 1995-10-13 2004-03-08 株式会社デンソー Accumulation type fuel injection device
DE19739810C1 (en) * 1997-09-10 1998-12-03 Siemens Ag Fuel injection system for IC engine
GB2358898B (en) * 1999-12-09 2002-04-24 Usui Kokusai Sangyo Kk Diesel engine fuel injection pipe
JP3806302B2 (en) * 2000-01-25 2006-08-09 臼井国際産業株式会社 Common rail
JP2003139008A (en) * 2001-10-31 2003-05-14 Bosch Automotive Systems Corp Accumulator fuel supply device
DE10224836A1 (en) * 2002-06-05 2004-01-08 Robert Bosch Gmbh Fuel injection device e.g. common-rail injector for IC engines in motor vehicles has fuel filter integrated in fuel feed pipe to injector, to reduce number of assembly components
JP2004225671A (en) * 2003-01-27 2004-08-12 Aisin Seiki Co Ltd Fuel supply device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006131426A1 *

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DE502006008445D1 (en) 2011-01-13
WO2006131426A1 (en) 2006-12-14
JP2008542625A (en) 2008-11-27
ATE490402T1 (en) 2010-12-15
EP1896720B1 (en) 2010-12-01
DE102005026992A1 (en) 2006-12-14

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