EP1408229A1 - Part bearing inner pressure with variable cross-sectional area - Google Patents

Part bearing inner pressure with variable cross-sectional area Download PDF

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Publication number
EP1408229A1
EP1408229A1 EP03013111A EP03013111A EP1408229A1 EP 1408229 A1 EP1408229 A1 EP 1408229A1 EP 03013111 A EP03013111 A EP 03013111A EP 03013111 A EP03013111 A EP 03013111A EP 1408229 A1 EP1408229 A1 EP 1408229A1
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EP
European Patent Office
Prior art keywords
component
section
pressure
cylindrical cross
internal pressure
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.)
Withdrawn
Application number
EP03013111A
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German (de)
French (fr)
Inventor
Markus Degn
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
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1408229A1 publication Critical patent/EP1408229A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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

Definitions

  • the invention relates to a component subject to internal pressure, in particular in the formation of a high-pressure fuel storage for Fuel injection for internal combustion engines with a high-pressure fuel pump, suitable for supplying the high-pressure fuel accumulator with fuel, the fuel high-pressure accumulator from a long-distance pipe-like body with an inside Hole and then with at least one hole for There is supply and removal.
  • accumulator injections common rail
  • components subject to internal pressure necessary are such components for high pressure storage (Rail) and injectors used.
  • These components of the fuel injection system are not only under very high internal pressure, but are also periodically strong fluctuations subject to internal pressure (so-called swelling internal pressure).
  • Such components therefore have to meet high strength requirements fulfill. In particular, it comes down to strength the drilling intersections inside the high pressure accumulator on.
  • the object of the invention is a geometric optimization to create the high-pressure accumulator (rails), so that in particular the sealing force at the end of the high pressure accumulator is reduced without, however, the function-optimized geometry of the high-pressure accumulator to change.
  • a major advantage of the invention is that in one certain section of the component under internal pressure Cross-section of the elongated internal bore can be designed as required can be without the known from the prior art Connection systems and locking systems are changed have to.
  • Another advantage is that especially the cylindrical Cross sections in the end areas of the internal pressure Component compared to the non-cylindrical cross section in the middle part a circular seal (axial or radial) allow according to conventional methods.
  • this can also the sealing diameters are minimized, which has the consequence that the sealing forces are also minimized accordingly. So that exists the ability to independently control the ends of the component under internal pressure from the dimensioning of the actual bore of the internal pressure To design part.
  • FIG. 1 is a cross section of a component 1 loaded by internal pressure shown that any outer contour has 2.
  • the one in the Component 1 arranged bore 3 extends in the longitudinal direction of the Component 1 and is continuous. Furthermore, open into this hole further bores 4, such as connecting parts 5 'and 5' ' is shown in Figure 2 and Figure 4 are performed.
  • the bore 3 has different cross sections according to the invention on, the cross section of the component 1 not in the central part 6 is cylindrical (see Figure 2 and Figure 4). In the end areas 7 and 8, however, is a cylindrical cross section (see FIG. 3 and Figure 5) provided, the cross section of the central part 6 to the end areas 7 and 8 (within the framework of the producibility) continuously runs. That is why this continuous course is necessary to avoid corresponding voltage maxima or peaks.
  • adapter parts 9 are provided in the end regions 7, 8, the one to accommodate an attachment that is not in the drawing is shown in more detail, is provided. In the case here in FIG. 1 The exemplary embodiment shown are adapter part 9 and component 1 integrally formed.
  • variable cross section of the bore 3 of the component 1 is complete independent of the outer contour 2, so that as in FIG. 2 shown, the connecting parts 5 'are weldable or as in FIG. 4 shows that the connecting parts 5 are forged are.
  • the invention can be applied to all components subjected to internal pressure apply, in particular common rail, injectors, pumps or the like.

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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)

Abstract

An internal pressure-loaded component (1), especially for fuel injection for a combustion engine, with a high-pressure fuel pump supplying a fuel store, comprises a long tube with inlet and outlet connections (5'). At least one section of the component has a non-cylindrical cross-section.

Description

Die Erfindung betrifft ein innendruckbelastetes Bauteil, insbesondere in der Ausbildung eines Kraftstoffhochdruckspeichers für eine Kraftstoffeinspritzung für Brennkraftmaschinen mit einer Kraftstoffhochdruckpumpe, geeignet für die Versorgung des Kraftstoffhochdruckspeichers mit Kraftstoff, wobei der Kraftstoffhochdruckspeicher aus einem langstreckenrohrartigen Körper mit einer innenliegenden Bohrung und anschließend mit zumindest einer Bohrung zur Zu- und Abfuhr besteht.The invention relates to a component subject to internal pressure, in particular in the formation of a high-pressure fuel storage for Fuel injection for internal combustion engines with a high-pressure fuel pump, suitable for supplying the high-pressure fuel accumulator with fuel, the fuel high-pressure accumulator from a long-distance pipe-like body with an inside Hole and then with at least one hole for There is supply and removal.

Stand der TechnikState of the art

Insbesondere bei sogenannten Speichereinspritzungen (Common-Rail) im Bereich der Einspritztechnik von Kraftstoffen bei Brennkraftmaschinen bzw. Verbrennungsmotoren, sind innendruckbelastete Bauteile notwendig. Hier werden solche Bauteile für Hochdruckspeicher (Rail) und Injektoren verwendet. Diese Bauteile des Kraftstoff-Einspritzsystems stehen nicht nur unter sehr hohem Innendruck, sondern sind auch darüber hinaus periodisch starken Schwankungen des Innendrucks unterworfen (sogenannter schwellender Innendruck). Daher müssen solche Bauteile entsprechend hohe Festigkeitsanforderungen erfüllen. Insbesondere kommt es in erster Linie auf die Festigkeit der Bohrungsverschneidungen im Inneren des Hochdruckspeichers an.Especially with so-called accumulator injections (common rail) in the field of fuel injection technology for internal combustion engines or internal combustion engines, are components subject to internal pressure necessary. Here are such components for high pressure storage (Rail) and injectors used. These components of the fuel injection system are not only under very high internal pressure, but are also periodically strong fluctuations subject to internal pressure (so-called swelling internal pressure). Such components therefore have to meet high strength requirements fulfill. In particular, it comes down to strength the drilling intersections inside the high pressure accumulator on.

Aufgabe der ErfindungObject of the invention

Die Aufgabe der Erfindung besteht darin, eine geometrische Optimierung des Hochdruckspeichers (Rails) zu schaffen, so dass insbesondere die Dichtkraft am Ende des Hochdruckspeichers reduziert wird, ohne jedoch die funktionsoptimierte Geometrie des Hochdruckspeichers zu ändern.The object of the invention is a geometric optimization to create the high-pressure accumulator (rails), so that in particular the sealing force at the end of the high pressure accumulator is reduced without, however, the function-optimized geometry of the high-pressure accumulator to change.

Lösung der AufgabeSolution of the task

Der Kern der Lösung der Aufgabe besteht darin, dass bei sonst nicht zylindrischem Querschnitt zumindest ein Endabschnitt des innendruckbelasteten Bauteils einen zylindrischen Querschnitt aufweist, insbesondere in demjenigen mit Bohrungsverschneidungen oder mit reinem Druckspeicherteil.The essence of the solution to the problem is that at otherwise non-cylindrical cross section at least an end portion of the internal pressure Component has a cylindrical cross section, especially in those with intersections or with pure pressure accumulator part.

Vorteile der ErfindungAdvantages of the invention

Ein wesentlicher Vorteil der Erfindung besteht darin, dass in einem bestimmten Abschnitt des innendruckbelasteten Bauteils der Querschnitt der langgestreckt innenliegenden Bohrung beliebig gestaltet werden kann, ohne dass die aus dem Stand der Technik bekannten Anschlusssysteme und Verschlusssysteme verändert werden müssen.A major advantage of the invention is that in one certain section of the component under internal pressure Cross-section of the elongated internal bore can be designed as required can be without the known from the prior art Connection systems and locking systems are changed have to.

Ein weiterer Vorteil besteht darin, dass insbesondere die zylindrischen Querschnitte in den Endbereichen des innendruckbelasteten Bauteils gegenüber den nicht zylindrischen Querschnitt im Mittelteil des Bauteils eine kreisförmige Abdichtung (axial oder radial) nach konventionellen Methoden erlauben. Zudem können dadurch auch die Dichtdurchmesser minimiert werden, was zur Folge hat, dass auch die Dichtkräfte entsprechend minimiert werden. Damit besteht die Möglichkeit, die Enden des innendruckbelasteten Bauteils unabhängig von der Dimensionierung der eigentlichen Bohrung des innendruckbelasteten Bauteils zu gestalten.Another advantage is that especially the cylindrical Cross sections in the end areas of the internal pressure Component compared to the non-cylindrical cross section in the middle part a circular seal (axial or radial) allow according to conventional methods. In addition, this can also the sealing diameters are minimized, which has the consequence that the sealing forces are also minimized accordingly. So that exists the ability to independently control the ends of the component under internal pressure from the dimensioning of the actual bore of the internal pressure To design part.

Weitere vorteilhafte Ausgestaltungen gehen aus der nachfolgenden Beschreibung sowie den Zeichnungen hervor.Further advantageous configurations are given in the following Description as well as the drawings.

Zeichnungendrawings

Es zeigen

Fig. 1
Einen Querschnitt durch einen innendruckbelastetes Bauteil (Rail);
Fig. 2
Einen Querschnitt durch das Bauteil gemäß Figur 1 entlang einer Linie II-II;
Fig. 3
Einen Querschnitt durch das Bauteil gemäß Figur 2 entlang einer Linie III(I)-III(I) und III(II)-III(II);
Fig. 4
Einen Querschnitt durch eine alternative Ausbildung des Bauteils gemäß Figur 1, hier mit einem Anschlusselement, das an das Bauteil angeschmiedet ist;
Fig. 5
Eine Querschnitt durch das Bauteil gemäß Figur 3 entlang einer Linie III(I)-III(I) und III(II)-III(II);
Show it
Fig. 1
A cross section through an internal pressure-loaded component (rail);
Fig. 2
A cross section through the component of Figure 1 along a line II-II;
Fig. 3
A cross section through the component according to Figure 2 along a line III (I) -III (I) and III (II) -III (II);
Fig. 4
A cross section through an alternative embodiment of the component according to Figure 1, here with a connecting element which is forged onto the component;
Fig. 5
A cross section through the component according to Figure 3 along a line III (I) -III (I) and III (II) -III (II);

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Fig. 1 ist im Querschnitt eines innendruckbelasteten Bauteils 1 gezeigt, dass eine beliebige Außenkontur 2 aufweist. Die in dem Bauteil 1 angeordnete Bohrung 3 verläuft in Längserstreckung des Bauteils 1 und ist durchgehend. Ferner münden in diese Bohrung weitere Bohrungen 4 ein, die über Anschlussteile 5' und 5'', wie in Figur 2 bzw. Figur 4 dargestellt ist, geführt werden.1 is a cross section of a component 1 loaded by internal pressure shown that any outer contour has 2. The one in the Component 1 arranged bore 3 extends in the longitudinal direction of the Component 1 and is continuous. Furthermore, open into this hole further bores 4, such as connecting parts 5 'and 5' ' is shown in Figure 2 and Figure 4 are performed.

Die Bohrung 3 weist erfindungsgemäß unterschiedliche Querschnitte auf, wobei im Mittelteil 6 der Querschnitt des Bauteils 1 nicht zylindrisch ist (siehe Figur 2 und Figur 4). In den Endbereichen 7 und 8 hingegen ist ein zylindrischer Querschnitt (siehe Figur 3 und Figur 5) vorgesehen, wobei der Querschnitt von dem Mittelteil 6 zu den Endbereichen 7 bzw. 8 (im Rahmen der Fertigbarkeit) kontinuierlich verläuft. Dieser kontinuierliche Verlauf ist deswegen notwendig, um entsprechende Spannungsmaximale bzw. Spitzen zu vermeiden.The bore 3 has different cross sections according to the invention on, the cross section of the component 1 not in the central part 6 is cylindrical (see Figure 2 and Figure 4). In the end areas 7 and 8, however, is a cylindrical cross section (see FIG. 3 and Figure 5) provided, the cross section of the central part 6 to the end areas 7 and 8 (within the framework of the producibility) continuously runs. That is why this continuous course is necessary to avoid corresponding voltage maxima or peaks.

Zusätzlich sind in den Endbereichen 7, 8 Adapterteile 9 vorgesehen, die zur Aufnahme eines Anbauteils, das in der Zeichnung nicht näher dargestellt ist, vorgesehen ist. Bei dem hier in Figur 1 dargestellten Ausführungsbeispiel sind Adapterteil 9 und Bauteil 1 einstückig ausgebildet. In addition, adapter parts 9 are provided in the end regions 7, 8, the one to accommodate an attachment that is not in the drawing is shown in more detail, is provided. In the case here in FIG. 1 The exemplary embodiment shown are adapter part 9 and component 1 integrally formed.

Der variable Querschnitt der Bohrung 3 des Bauteils 1 ist vollständig unabhängig von der Außenkontur 2, so dass wie in Figur 2 dargestellt, die Anschlussteile 5' anschweißbar sind oder wie in Figur 4 dargestellt ist, dass die Anschlussteile 5 geschmiedet sind.The variable cross section of the bore 3 of the component 1 is complete independent of the outer contour 2, so that as in FIG. 2 shown, the connecting parts 5 'are weldable or as in FIG. 4 shows that the connecting parts 5 are forged are.

Die Erfindung lässt sich auf alle innendruckbelasteten Bauteile anwenden, insbesondere Common Rail, Injektoren, Pumpen oder dergleichen.The invention can be applied to all components subjected to internal pressure apply, in particular common rail, injectors, pumps or the like.

Claims (5)

Innendruckbelastetes Bauteil, insbesondere in der Ausbildung eines Kraftstoffhochdruckspeichers für eine Kraftstoffeinspritzung für Brennkraftmaschinen mit einer Kraftstoffhochdruckpumpe, geeignet für die Versorgung des Kraftstoffhochdruckspeichers mit Kraftstoff, wobei der Kraftstoffhochdruckspeicher aus einem langgestreckten rohrartigen Körper mit einer innenliegenden Bohrung und Anschlüssen mit Bohrungen zur Zu- und Abfuhr besteht, dadurch gekennzeichnet, dass zumindest ein Abschnitt des innendruckbelasteten Bauteils (1) einen nicht-zylindrischen Querschnitt aufweist.Component subject to internal pressure, in particular in the design of a high-pressure fuel reservoir for fuel injection for internal combustion engines with a high-pressure fuel pump, suitable for supplying the high-pressure fuel reservoir with fuel, the high-pressure fuel reservoir consisting of an elongated tubular body with an internal bore and connections with bores for supply and discharge, characterized in that at least a portion of the component (1) subjected to internal pressure has a non-cylindrical cross section. Bauteil nach Anspruch 1, dadurch gekennzeichnet, dass mindestens ein Endbereich (7,8) des Bauteils (1) einen zylindrischen Querschnitt aufweist.Component according to claim 1, characterized in that at least one end region (7, 8) of the component (1) has a cylindrical cross section. Bauteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Übergang von dem nicht zylindrischen Querschnitt zu dem zylindrischen Querschnitt kontinuierlich erfolgt. Component according to claim 1 or 2, characterized in that the transition from the non-cylindrical cross section to the cylindrical cross section takes place continuously. Bauteil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens ein Endbereich (7,8) des Bauteils (1) ein Adapterteil (9) zur Aufnahme eines Anbauteils aufweist.Component according to at least one of the preceding claims, characterized in that at least one end region (7, 8) of the component (1) has an adapter part (9) for receiving an add-on part. Bauteil nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Adapterteil und Bauteil einrichtig ausgebildet sind.Component according to at least one of the preceding claims, characterized in that the adapter part and the component are formed in one direction.
EP03013111A 2002-10-10 2003-06-11 Part bearing inner pressure with variable cross-sectional area Withdrawn EP1408229A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10247323 2002-10-10
DE10247323A DE10247323A1 (en) 2002-10-10 2002-10-10 Component subject to internal pressure, in particular for fuel injection for internal combustion engines with a variable internal diameter

Publications (1)

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EP1408229A1 true EP1408229A1 (en) 2004-04-14

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EP03013111A Withdrawn EP1408229A1 (en) 2002-10-10 2003-06-11 Part bearing inner pressure with variable cross-sectional area

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EP (1) EP1408229A1 (en)
JP (1) JP2004132374A (en)
DE (1) DE10247323A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020029929A1 (en) * 2000-05-12 2002-03-14 Tinianov Brandon Dillan Acoustical ceiling tiles
US20020038650A1 (en) * 2000-10-04 2002-04-04 Scollard Joseph E. Fuel system including a fuel injector directly mounted to a fuel rail
US6427665B1 (en) * 1999-11-08 2002-08-06 Robert Bosch Gmbh High pressure fuel reservoir
US20020112697A1 (en) * 2000-11-14 2002-08-22 Helmut Knoedl Fuel high pressure accumulator for fuel injection system of internal combustion engines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09317599A (en) * 1996-05-22 1997-12-09 Usui Internatl Ind Co Ltd Common rail and manufacture thereof
CA2230744A1 (en) * 1997-03-03 1998-09-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same
JP3352350B2 (en) * 1997-03-04 2002-12-03 臼井国際産業株式会社 Common rail
DE19948338A1 (en) * 1999-10-07 2001-04-12 Bosch Gmbh Robert Process for processing a high-pressure fuel accumulator, high-pressure fuel accumulator and connecting piece for using the method
DE19949962A1 (en) * 1999-10-16 2001-04-26 Bosch Gmbh Robert Fuel high pressure storage for a common-rail fuel injection system of IC engine with hollow basic body which is equipped with several connection openings
DE10012961A1 (en) * 2000-03-16 2001-09-20 Bosch Gmbh Robert High pressure part for fuel injection system; has intersecting bores, where at least one bore has flat part and part has internal pressure stresses in area of flat part

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6427665B1 (en) * 1999-11-08 2002-08-06 Robert Bosch Gmbh High pressure fuel reservoir
US20020029929A1 (en) * 2000-05-12 2002-03-14 Tinianov Brandon Dillan Acoustical ceiling tiles
US20020038650A1 (en) * 2000-10-04 2002-04-04 Scollard Joseph E. Fuel system including a fuel injector directly mounted to a fuel rail
US20020112697A1 (en) * 2000-11-14 2002-08-22 Helmut Knoedl Fuel high pressure accumulator for fuel injection system of internal combustion engines

Also Published As

Publication number Publication date
DE10247323A1 (en) 2004-04-22
US20040107942A1 (en) 2004-06-10
JP2004132374A (en) 2004-04-30

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