EP1144853B1 - High-pressure fuel accumulator and a method for producing the same - Google Patents
High-pressure fuel accumulator and a method for producing the same Download PDFInfo
- Publication number
- EP1144853B1 EP1144853B1 EP00979428A EP00979428A EP1144853B1 EP 1144853 B1 EP1144853 B1 EP 1144853B1 EP 00979428 A EP00979428 A EP 00979428A EP 00979428 A EP00979428 A EP 00979428A EP 1144853 B1 EP1144853 B1 EP 1144853B1
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- EP
- European Patent Office
- Prior art keywords
- region
- pressure fuel
- base body
- connection
- fuel accumulator
- 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 - Lifetime
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Classifications
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
Definitions
- the invention relates to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a hollow base body which is equipped with a plurality of connection openings, and a method for producing such a high-pressure fuel accumulator.
- a high-pressure pump conveys the fuel to be injected from a tank into the central high-pressure fuel accumulator, which is referred to as a common rail.
- the rail lead fuel lines to the individual injectors, which are assigned to the cylinders of the internal combustion engine.
- the injectors are controlled individually by the engine electronics as a function of the operating parameters of the internal combustion engine in order to inject fuel into the combustion chamber of the internal combustion engine. Due to the high-pressure fuel storage, the pressure generation and the injection are decoupled from each other.
- a conventional high-pressure fuel storage is eg in DE 195 48 611 described.
- the conventional high-pressure fuel storage can withstand pressures of up to about 1100 bar.
- the object of the invention is to increase the high pressure resistance of the known high-pressure fuel storage with simple measures.
- the object is achieved in a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine by the features of claim 1.
- the high-pressure resistance of the high-pressure fuel accumulator is increased without the volume of construction significantly increases.
- the compressive strength of the high-pressure fuel accumulator increases when the ratio between the inner diameter of the main body and the inner diameter of the port openings is made as large as possible.
- the local extension of the base body inner diameter leads to an increase in this diameter ratio in the critical region of the connection openings without the outer dimensions of the high-pressure fuel accumulator according to the invention increasing.
- a particular embodiment of the high-pressure fuel accumulator according to the invention provides that on the main body connecting pieces are formed with a connection bore whose center line is arranged perpendicular to the flat surface in the region of the connection opening. This provides the advantage of minimizing stress spikes in the intersection area.
- the above object is achieved in a method for producing the above-described high-pressure fuel storage in that the tubular body in the region of the connection openings over the entire circumference is deformed inwardly so that it projects inwards and that the inwardly projecting region is machined to form a flat surface in the region of the connection openings.
- a local expansion of the basic body inner diameter is achieved in a simple manner only in the region of the connection openings.
- a particular embodiment of the method according to the invention is characterized in that the interior of the tubular base body is processed in the region of the connection openings by means of an electrochemical removal method (ECM, Electro-Chemical Machining).
- ECM Electro-Chemical Machining
- the high-pressure fuel accumulator shown in cross-section in FIG. 1 comprises a tubular base body 1.
- a longitudinal bore 2 forms the storage volume.
- a connection piece 3 is formed, in which a connection bore 4 extends transversely to the longitudinal axis of the tubular base body 1.
- the connection bore 4 opens into the longitudinal bore 2.
- An area 5 of the tubular base body 1 was removed by means of a material-removing machining process. In this way, a flat surface 6 was created in the mouth region of the connection bore 4. The flat surface 6 extends perpendicular to the center line of the connection bore 4. The contour of the cylindrical interior of the tubular base body 1 is indicated by dashed lines in Fig. 1.
- FIG. 2 shows a section of a high-pressure fuel accumulator according to the invention in cross section.
- a tubular base body as in the embodiment shown in Fig. 1, a longitudinal bore 2 is arranged.
- a connection hole 4 In the longitudinal bore 2 opens a connection hole 4.
- a cuboid recess 5 In the area where the connection hole 4 opens into the longitudinal bore 2, there is a cuboid recess 5 in the tubular body 1.
- a flat surface 6 is created extends perpendicular to the center line of the connection bore 4.
- Fig. 3 is a longitudinal section through a further embodiment of a high-pressure fuel storage according to the invention is shown.
- the high-pressure fuel accumulator shown in Fig. 3 comprises a tubular body 1.
- a longitudinal bore 2 is arranged in the tubular body 1.
- a longitudinal bore 2 is arranged in the longitudinal bore 2 in the longitudinal bore 2 opens a radial connection hole. 4
- connection bore 4 8 of the outer surface of the tubular body 1 is pressed over the entire circumference of the tubular body 1 by means of a corresponding tool.
- the deformation of the outer circumferential surface of the tubular base body 1 causes the interior of the tubular body 1 projecting an annular region 9, which is shown in dashed lines in Fig. 3.
- the protruding region 9 is removed in the mouth region of the connection bore 4 in such a way that a flat surface 6 results.
- FIG. 4 shows a longitudinal section of a method for producing a high-pressure fuel accumulator according to the invention.
- the high-pressure fuel accumulator shown in Fig. 4 comprises a tubular body 1.
- a longitudinal bore 2 is recessed.
- the longitudinal bore 2 opens a radial connection hole. 4
- an ECM electrode is inserted into the longitudinal bore 2. With the help of the ECM electrode 10, the material of the tubular base body 1 in the region 5 is removed. This results in the mouth region of the connection bore 4 a flat surface. 6
- ECM Electro-Chemical Machining
- the Electrochemical removal also referred to as elution, is an ablation process in which metallic material is anodically dissolved under the action of an electric current and an electrolyte solution.
- the current flow can be effected by an external current source, but also by a local element formation on the workpiece (internal voltage source).
- the mode of action of anodic metal dissolution is based on electrochemical reactions in which metal ions pass from the metal phase into the electrolyte phase or into a reaction product phase. These reactions are initiated by charge exchange processes and follow the internal kinetics of a galvanic element.
- the inner diameter of the tubular base body 1 acting on the intersection between the longitudinal bore 2 and the connecting bore 4 is widened locally, i. made as large as possible, without the high-pressure fuel storage according to the invention assumes extreme external dimensions.
- a maximum high-pressure resistance is achieved with minimal construction volume.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung betrifft einen Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine, mit einem hohlen Grundkörper, der mit mehreren Anschlussöffnungen ausgestattet ist, und ein Verfahren zum Herstellen eines derartigen Kraftstoffhochdruckspeichers.The invention relates to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a hollow base body which is equipped with a plurality of connection openings, and a method for producing such a high-pressure fuel accumulator.
In Common-Rail-Einspritzsystemen fördert eine Hochdruckpumpe, eventuell unter Zuhilfenahme einer Vorförderpumpe, den einzuspritzenden Kraftstoff aus einem Tank in den zentralen Kraftstoffhochdruckspeicher, der als Common-Rail bezeichnet wird. Von dem Rail führen Kraftstoffleitungen zu den einzelnen Injektoren, die den Zylindern der Brennkraftmaschine zugeordnet sind. Die Injektoren werden in Abhängigkeit von den Betriebsparametern der Brennkraftmaschine einzeln von der Motorelektronik angesteuert, um Kraftstoff in den Brennraum der Brennkraftmaschine einzuspritzen. Durch den Kraftstoffhochdruckspeicher sind die Druckerzeugung und die Einspritzung voneinander entkoppelt.In common-rail injection systems, a high-pressure pump, possibly with the aid of a prefeed pump, conveys the fuel to be injected from a tank into the central high-pressure fuel accumulator, which is referred to as a common rail. From the rail lead fuel lines to the individual injectors, which are assigned to the cylinders of the internal combustion engine. The injectors are controlled individually by the engine electronics as a function of the operating parameters of the internal combustion engine in order to inject fuel into the combustion chamber of the internal combustion engine. Due to the high-pressure fuel storage, the pressure generation and the injection are decoupled from each other.
Ein herkömmlicher Kraftstoffhochdruckspeicher ist z.B. in der DE 195 48 611 beschrieben. Die herkömmlichen Kraftstoffhochdruckspeicher halten Drücke von bis zu etwa 1100 bar aus.A conventional high-pressure fuel storage is eg in DE 195 48 611 described. The conventional high-pressure fuel storage can withstand pressures of up to about 1100 bar.
Aus der DE 198 08 894 A1 sind Kraftstoffhochdruckspeicher bekannt, bei denen zur Erzeugung von Druckeigenspannungen der Innenraum des Grundkörpers im Bereich der Anschlussöffnungen lokal nach innen verformt wird und diese Verformung anschließend durch spanabhebende Bearbeitung wieder entfernt wird. Dadurch erhält der fertige Kraftstoffhochdruckspeicher seine ursprüngliche rohrförmige Gestalt wieder.From DE 198 08 894 A1 high-pressure fuel storage are known in which the interior of the body is deformed locally in the region of the connection openings to generate compressive residual stresses and this deformation is then removed by machining again. As a result, the finished high-pressure fuel storage is restored to its original tubular shape.
Aus der DE 198 08 807 A1 und der JP 10318086 ist ein sehr dickwandiger Kraftstoffhochdruckspeicher bekannt bei dem durch eine Abflachung des inneren Querschnitts im Bereich der Anschlussöffnungen eine ebene Fläche geschaffen wird.From DE 198 08 807 A1 and JP 10318086 a very thick-walled high-pressure fuel storage is known in which a flat surface is created by a flattening of the inner cross section in the region of the connection openings.
Aufgabe der Erfindung ist es, die Hochdruckfestigkeit der bekannten Kraftstoffhochdruckspeicher mit einfachen Maßnahmen zu erhöhen.The object of the invention is to increase the high pressure resistance of the known high-pressure fuel storage with simple measures.
Die Aufgabe ist bei einem Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine durch die Merkmale des Anspruchs 1 gelöst. Im Verschneidungsbereich treten im Betrieb Spannungsspitzen auf, die zu Rissbildungen im Grundkörper führen können. Durch die erfindungsgemäße Lösung wird die Hochdruckfestigkeit des Kraftstoffhochdruckspeichers erhöht, ohne dass dessen Bauvolumen wesentlich zunimmt. Die Druckfestigkeit des Kraftstoffhochdruckspeichers nimmt nämlich zu, wenn das Verhältnis zwischen dem Innendurchmesser des Grundkörpers und dem Innendurchmesser der Anschlussöffnungen möglichst groß gewählt wird. Die lokale Erweiterung des Grundkörperinnendurchmessers führt zu einer Erhöhung dieses Durchmesserverhältnisses im kritischen Bereich der Anschlussöffnungen, ohne dass die Außenabmessungen des erfindungsgemäßen Kraftstoffhochdruckspeichers zunehmen.The object is achieved in a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine by the features of
Eine besondere Ausführungsart des erfindungsgemäßen Kraftstoffhochdruckspeichers sieht vor, dass an dem Grundkörper Anschlussstutzen mit einer Anschlussbohrung ausgebildet sind, deren Mittellinie senkrecht zu der ebenen Fläche im Bereich der Anschlussöffnung angeordnet ist. Das liefert den Vorteil, dass die Spannungsspitzen im Verschneidungsbereich minimiert werden.A particular embodiment of the high-pressure fuel accumulator according to the invention provides that on the main body connecting pieces are formed with a connection bore whose center line is arranged perpendicular to the flat surface in the region of the connection opening. This provides the advantage of minimizing stress spikes in the intersection area.
Die oben angegebene Aufgabe ist bei einem Verfahren zum Herstellen des vorab beschriebenen Kraftstoffhochdruckspeichers dadurch gelöst, dass der rohrförmige Grundkörper im Bereich der Anschlussöffnungen über den gesamten Umfang so nach innen verformt wird, dass er nach innen vorspringt und dass der nach innen vorspringende Bereich bearbeitet wird, um im Bereich der Anschlussöffnungen eine ebene Fläche auszubilden. Dadurch wird auf einfache Art und Weise eine lokale Erweiterung des Grundkörperinnendurchmessers nur im Bereich der Anschlussöffnungen erreicht.The above object is achieved in a method for producing the above-described high-pressure fuel storage in that the tubular body in the region of the connection openings over the entire circumference is deformed inwardly so that it projects inwards and that the inwardly projecting region is machined to form a flat surface in the region of the connection openings. As a result, a local expansion of the basic body inner diameter is achieved in a simple manner only in the region of the connection openings.
Eine besondere Ausführungsart des erfindungsgemäßen Verfahrens ist dadurch gekennzeichnet, dass der Innenraum des rohrförmigen Grundkörpers im Bereich der Anschlussöffnungen mit Hilfe eines elektrochemischen Abtragverfahrens (ECM, Electro-Chemical Machining) bearbeitet wird. Die Anwendung dieses Verfahrens hat sich in der Praxis als besonders vorteilhaft erwiesen.A particular embodiment of the method according to the invention is characterized in that the interior of the tubular base body is processed in the region of the connection openings by means of an electrochemical removal method (ECM, Electro-Chemical Machining). The application of this method has proved to be particularly advantageous in practice.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung Ausführungsbeispiele der Erfindung im Einzelnen beschrieben sind. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, embodiments of the invention are described in detail. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.
In der Zeichnung zeigen:
- Fig. 1: eine erste Ausführungsform eines erfindungsgemäßen Kraftstoffhochdruckspeichers im Querschnitt;
- Fig. 2: einen Ausschnitt aus Fig. 1;
- Fig. 3: eine weitere Ausführungsform eines erfindungsgemäßen Kraftstoffhochdruckspeichers im Längsschnitt; und
- Fig. 4: einen Längsschnitt durch einen erfindungsgemäßen Kraftstoffhochdruckspeicher mit einem eingeführten Bearbeitungswerkzeug.
- 1 shows a first embodiment of a high-pressure fuel storage according to the invention in cross section.
- Fig. 2: a detail of Fig. 1;
- 3 shows a further embodiment of a high-pressure fuel accumulator according to the invention Longitudinal section; and
- 4 shows a longitudinal section through a high-pressure fuel accumulator according to the invention with an inserted machining tool.
Der in Fig. 1 im Querschnitt dargestellte Kraftstoffhochdruckspeicher umfasst einen rohrförmigen Grundkörper 1. In dem rohrförmigen Grundkörper 1 bildet eine Längsbohrung 2 das Speichervolumen. An dem rohrförmigen Grundkörper 1 ist ein Anschlussstutzen 3 ausgebildet, in dem sich eine Anschlussbohrung 4 quer zur Längsachse des rohrförmigen Grundkörpers 1 erstreckt. Die Anschlussbohrung 4 mündet in die Längsbohrung 2.The high-pressure fuel accumulator shown in cross-section in FIG. 1 comprises a
Ein Bereich 5 des rohrförmigen Grundkörpers 1 wurde mit Hilfe eines Material abtragenden Bearbeitungsverfahrens entfernt. Auf diese Art und Weise wurde im Mündungsbereich der Anschlussbohrung 4 eine ebene Fläche 6 geschaffen. Die ebene Fläche 6 erstreckt sich senkrecht zur Mitellinie der Anschlussbohrung 4. Die Kontur des zylinderförmigen Innenraums des rohrförmigen Grundkörpers 1 ist in Fig. 1 gestrichelt angedeutet.An
In Fig. 2 ist ein Ausschnitt eines erfindungsgemäßen Kraftstoffhochdruckspeichers im Querschnitt dargestellt. In einem rohrförmigen Grundkörper 1 ist, wie bei der in Fig. 1 dargestellten Ausführungsform, eine Längsbohrung 2 angeordnet. In die Längsbohrung 2 mündet eine Anschlussbohrung 4. In dem Bereich, wo die Anschlussbohrung 4 in die Längsbohrung 2 mündet, befindet sich eine quaderförmige Ausnehmung 5 in dem rohrförmigen Grundkörper 1. Dadurch wird in dem Innenraum des Grundkörpers 1 eine ebene Fläche 6 geschaffen, die sich senkrecht zu der Mittellinie der Anschlussbohrung 4 erstreckt.FIG. 2 shows a section of a high-pressure fuel accumulator according to the invention in cross section. In a
In Fig. 3 ist ein Längsschnitt durch eine weitere Ausführungsform eines erfindungsgemäßen Kraftstoffhochdruckspeichers dargestellt. Der in Fig. 3 dargestellte Kraftstoffhochdruckspeicher umfasst einen rohrförmigen Grundkörper 1. In dem rohrförmigen Grundkörper 1 ist eine Längsbohrung 2 angeordnet. In die Längsbohrung 2 mündet eine radiale Anschlussbohrung 4.In Fig. 3 is a longitudinal section through a further embodiment of a high-pressure fuel storage according to the invention is shown. The high-pressure fuel accumulator shown in Fig. 3 comprises a
Der die Anschlussbohrung 4 umgebende Bereich 8 der äußeren Mantelfläche des rohrförmigen Grundkörpers 1 ist über den gesamten Umfang des rohrförmigen Grundkörpers 1 mit Hilfe eines entsprechenden Werkzeugs eingedrückt. Die Verformung der äußeren Mantelfläche des rohrförmigen Grundkörpers 1 führt dazu, dass im Inneren des rohrförmigen Grundkörpers 1 ein ringförmiger Bereich 9 vorspringt, der in Fig. 3 gestrichelt dargestellt ist. Der vorspringende Bereich 9 ist im Mündungsbereich der Anschlussbohrung 4 so abgetragen, dass sich eine ebene Fläche 6 ergibt.The area surrounding the connection bore 4 8 of the outer surface of the
In Fig. 4 ist ein Verfahren zur Herstellung eines erfindungsgemäßen Kraftstoffhochdruckspeichers im Längsschnitt dargestellt. Der in Fig. 4 dargestellte Kraftstoffhochdruckspeicher umfasst einen rohrförmigen Grundkörper 1. In dem rohrförmigen Grundkörper 1 ist eine Längsbohrung 2 ausgespart. In die Längsbohrung 2 mündet eine radiale Anschlussbohrung 4.FIG. 4 shows a longitudinal section of a method for producing a high-pressure fuel accumulator according to the invention. The high-pressure fuel accumulator shown in Fig. 4 comprises a
Zum Entfernen des Bereichs 5 im Inneren des Grundkörpers 1 ist eine ECM-Elektrode in die Längsbohrung 2 eingeführt. Mit Hilfe der ECM-Elektrode 10 wird das Material des rohrförmigen Grundkörpers 1 in dem Bereich 5 entfernt. Dadurch ergibt sich im Mündungsbereich der Anschlussbohrung 4 eine ebene Fläche 6.To remove the
ECM (Electro-Chemical Machining) ist die englische Bezeichnung für elektrochemisches Abtragen. Das elektrochemische Abtragen, das auch als Elysieren bezeichnet wird, ist ein Abtragverfahren, bei dem metallischer Werkstoff unter Einwirkung eines elektrischen Stroms und einer Elektrolytlösung anodisch aufgelöst wird. Der Stromfluss kann dabei durch eine äußere Stomquelle, aber auch durch eine Lokalelementbildung am Werkstück (innere Spannungsquelle) bewirkt werden. Das Wirkprinzip des anodischen Metallauflösens beruht auf elektrochemischen Reaktionen, bei denen Metallionen aus der Metallphase in die Elektrolytphase oder in eine Reaktionsproduktphase übergehen. Diese Reaktionen werden durch Ladungsaustauschvorgänge in Gang gesetzt und folgen der inneren Kinetik eines galvanischen Elements.ECM (Electro-Chemical Machining) is the English term for electrochemical ablation. The Electrochemical removal, also referred to as elution, is an ablation process in which metallic material is anodically dissolved under the action of an electric current and an electrolyte solution. The current flow can be effected by an external current source, but also by a local element formation on the workpiece (internal voltage source). The mode of action of anodic metal dissolution is based on electrochemical reactions in which metal ions pass from the metal phase into the electrolyte phase or into a reaction product phase. These reactions are initiated by charge exchange processes and follow the internal kinetics of a galvanic element.
Gemäß der vorliegenden Erfindung wird der an der Verschneidung zwischen der Längsbohrung 2 und der Anschlussbohrung 4 wirkende Innendurchmesser des rohrförmigen Grundkörpers 1 lokal erweitert, d.h. so groß wie möglich gemacht, ohne dass der erfindungsgemäße Kraftstoffhochdruckspeicher extreme Außenmaße annimmt. Dadurch wird eine maximale Hochdruckfestigkeit bei minimiertem Bauvolumen erzielt.According to the present invention, the inner diameter of the
Claims (4)
- High-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a tubular base body (1) which is equipped with a plurality of connection openings (4), the interior space of the base body (1) being planar in the region of the connection openings (4), characterized in that the interior space of the base body (1) is a cuboidal recess (5), said interior space being planar in the region of the connection openings (4).
- High-pressure fuel accumulator according to Claim 1, characterized in that connecting pieces (3) having in each case one connection opening (4) are formed on the base body (1), the centre line of said connecting opening (4) being arranged perpendicular to the respective planar face (6) in the region of the respective connection opening (4).
- Method for producing a high-pressure fuel accumulator according to one of Claims 1 or 2, characterized in that, in the region of the connection openings (4), the tubular base body (1) is deformed inwardly over its entire circumference in such a way that it projects inwards, and in that the inwardly projecting region (9) is machined in a material-removing fashion in the opening-out region of the connection bore (4) in order to form a planar face (5) in the opening-out region of the connection bore (4).
- Method for producing a high-pressure fuel accumulator according to Claim 3, characterized in that the interior space of the tubular base body (1) is machined in the region of the connection openings (4) by means of an electrochemical abrading process.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19949962A DE19949962A1 (en) | 1999-10-16 | 1999-10-16 | 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 |
| DE19949962 | 1999-10-16 | ||
| PCT/DE2000/003606 WO2001029405A1 (en) | 1999-10-16 | 2000-10-13 | High-pressure fuel accumulator and a method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1144853A1 EP1144853A1 (en) | 2001-10-17 |
| EP1144853B1 true EP1144853B1 (en) | 2006-10-25 |
Family
ID=7925911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00979428A Expired - Lifetime EP1144853B1 (en) | 1999-10-16 | 2000-10-13 | High-pressure fuel accumulator and a method for producing the same |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6612289B1 (en) |
| EP (1) | EP1144853B1 (en) |
| JP (1) | JP2003512560A (en) |
| DE (2) | DE19949962A1 (en) |
| ES (1) | ES2275562T3 (en) |
| WO (1) | WO2001029405A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10140057B4 (en) | 2001-08-16 | 2007-08-30 | Robert Bosch Gmbh | High-pressure fuel storage |
| DE10140058A1 (en) * | 2001-08-16 | 2002-10-24 | Bosch Gmbh Robert | High pressure fuel storage-container has basic body with lengthwise and transverse hollow cavities, connecting support, and inner storage chamber |
| DE10143519A1 (en) * | 2001-09-05 | 2003-03-27 | Siemens Ag | High pressure fuel reservoir, for e.g. common rail fuel injection system, has main body with lengthy recess and internal ridge penetrated by bores |
| DE10152261A1 (en) | 2001-10-20 | 2003-04-30 | Bosch Gmbh Robert | High pressure accumulators like high pressure fuel accumulators |
| DE10214404A1 (en) * | 2002-03-30 | 2003-10-09 | Bosch Gmbh Robert | Component, in particular housing a high pressure fuel pump, and method for its preparation |
| US6789528B2 (en) * | 2002-04-05 | 2004-09-14 | Denso Corporation | High pressure fuel supply device having plating layer and manufacturing method thereof |
| DE10247323A1 (en) * | 2002-10-10 | 2004-04-22 | Robert Bosch Gmbh | Component subject to internal pressure, in particular for fuel injection for internal combustion engines with a variable internal diameter |
| DK1413744T3 (en) * | 2002-10-23 | 2006-02-13 | Waertsilae Nsd Schweiz Ag | Pressure bearing for a common rail system |
| AU2002368377A1 (en) * | 2002-11-19 | 2004-06-15 | Robert Bosch Gmbh | Conduit intersection for high pressure fluid flow |
| DE10304961B3 (en) * | 2003-02-06 | 2004-08-19 | Robert Bosch Gmbh | Method for producing a high-pressure fuel accumulator |
| US7021291B2 (en) * | 2003-12-24 | 2006-04-04 | Cummins Inc. | Juncture for a high pressure fuel system |
| DE102007018471A1 (en) | 2007-04-19 | 2008-10-23 | Robert Bosch Gmbh | Intersection between a high pressure chamber and a high pressure channel |
| FI120844B (en) * | 2007-05-31 | 2010-03-31 | Waertsilae Finland Oy | Fuel supply system fuel storage |
| EP2299102A1 (en) * | 2009-09-07 | 2011-03-23 | OMT Officine Meccaniche Torino S.p.A. | High-pressure fuel accumulator for common-rail injection systems |
| DE102011079075A1 (en) | 2011-07-13 | 2013-01-17 | Hirschvogel Umformtechnik Gmbh | Inner pressure-loaded component for forming high pressure fuel rail for common-rail fuel injection system of combustion engine of vehicle, has relief notches extending over entire length of longitudinal cavity in axial direction |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4899712A (en) * | 1983-06-21 | 1990-02-13 | Gerard De Bruyn | Fuel injection rail manufacturing means and process |
| JPS61236426A (en) * | 1985-04-12 | 1986-10-21 | Mitsui Eng & Shipbuild Co Ltd | Electrochemically polishing method and its device for inside metal pipe |
| JP2678754B2 (en) * | 1987-06-09 | 1997-11-17 | 日本酸素株式会社 | Manufacturing method of stainless steel manifold for supplying high purity gas |
| JPH0649897Y2 (en) * | 1988-01-08 | 1994-12-14 | ダイハツ工業株式会社 | Structure of fuel delivery pipe in internal combustion engine |
| US5192026A (en) * | 1990-03-29 | 1993-03-09 | Cummins Engine Company, Inc. | Fuel injectors and methods for making fuel injectors |
| US5513613A (en) * | 1994-07-15 | 1996-05-07 | Ford Motor Company | Automotive fuel rail end closure device with temperature sensor for returnless fuel system |
| DE29521402U1 (en) * | 1995-12-23 | 1997-04-24 | Robert Bosch Gmbh, 70469 Stuttgart | Fuel injection system |
| DE19607521C1 (en) * | 1996-02-28 | 1997-04-10 | Juergen Dipl Ing Guido | High-pressure fuel pipe, for diesel engine with common-rail system |
| GB2322920B (en) * | 1997-03-03 | 2002-02-27 | Usui Kokusi Sangyo Kaisha Ltd | Common rail and method of manufacturing the same |
| JP3846763B2 (en) * | 1997-03-03 | 2006-11-15 | 臼井国際産業株式会社 | Manufacturing method of common rail |
| CA2230745A1 (en) * | 1997-03-03 | 1998-09-03 | Kikuo Asada | Method for improving fatigue strength due to repeated pressure at branch hole part in member for high pressure fluid, branch hole part of member for high pressure fluid formed by the method, and member for high pressure fluid with built-in slider having the branch hole |
| US6126208A (en) * | 1997-03-03 | 2000-10-03 | Usui Kokusai Sangyo Kaisha Limited | Common rail and method of manufacturing the same |
| JPH10318086A (en) * | 1997-03-03 | 1998-12-02 | Usui Internatl Ind Co Ltd | Common rail and its manufacture |
| JPH10318083A (en) * | 1997-03-03 | 1998-12-02 | Usui Internatl Ind Co Ltd | Common rail and its manufacture |
| JPH10318084A (en) * | 1997-03-03 | 1998-12-02 | Usui Internatl Ind Co Ltd | Slider incorporated type member having branch hole for high pressure fluid |
| JP3352350B2 (en) * | 1997-03-04 | 2002-12-03 | 臼井国際産業株式会社 | Common rail |
| FR2765919B1 (en) * | 1997-07-09 | 1999-10-01 | Cideb | FUEL DISTRIBUTION DEVICE FOR SUPPLYING THE CYLINDERS OF AN INTERNAL COMBUSTION ENGINE |
| FR2778950B1 (en) * | 1998-05-19 | 2000-08-11 | Cideb | FUEL DISTRIBUTION DEVICE FOR INTERNAL COMBUSTION ENGINE |
-
1999
- 1999-10-16 DE DE19949962A patent/DE19949962A1/en not_active Ceased
-
2000
- 2000-10-13 DE DE50013661T patent/DE50013661D1/en not_active Expired - Lifetime
- 2000-10-13 ES ES00979428T patent/ES2275562T3/en not_active Expired - Lifetime
- 2000-10-13 EP EP00979428A patent/EP1144853B1/en not_active Expired - Lifetime
- 2000-10-13 JP JP2001531969A patent/JP2003512560A/en active Pending
- 2000-10-13 WO PCT/DE2000/003606 patent/WO2001029405A1/en active IP Right Grant
- 2000-10-13 US US09/868,313 patent/US6612289B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003512560A (en) | 2003-04-02 |
| US6612289B1 (en) | 2003-09-02 |
| DE50013661D1 (en) | 2006-12-07 |
| EP1144853A1 (en) | 2001-10-17 |
| ES2275562T3 (en) | 2007-06-16 |
| WO2001029405A1 (en) | 2001-04-26 |
| DE19949962A1 (en) | 2001-04-26 |
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