EP1117925B1 - High pressure fuel accumulator - Google Patents
High pressure fuel accumulator Download PDFInfo
- Publication number
- EP1117925B1 EP1117925B1 EP00962180A EP00962180A EP1117925B1 EP 1117925 B1 EP1117925 B1 EP 1117925B1 EP 00962180 A EP00962180 A EP 00962180A EP 00962180 A EP00962180 A EP 00962180A EP 1117925 B1 EP1117925 B1 EP 1117925B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure fuel
- high pressure
- fuel accumulator
- intermediate element
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
Definitions
- the invention relates to a high-pressure fuel storage for a Common rail fuel injection system of an internal combustion engine, with several fittings for fuel lines.
- a high-pressure pump delivers possibly with the aid of a prefeed pump, the Fuel to be injected from a tank in the central High-pressure fuel storage, referred to as common rail becomes.
- the Fuel to be injected from a tank in the central High-pressure fuel storage referred to as common rail becomes.
- the injectors are dependent on the Operating parameters of the internal combustion engine individually from the Engine electronics controlled to fuel in the combustion chamber of the Inject internal combustion engine.
- a conventional high pressure fuel storage is e.g. in the DE 196 06 946 A1.
- the known High-pressure fuel storage consists of an elongated, tubular body with several
- the object of the invention is a high-pressure fuel storage the type described above in such a way that the ends the fuel lines in the fittings sufficient are mobile. Despite the sufficient mobility, the Tightness at the connection points even at high pressures to be guaranteed.
- the inventive High-pressure fuel storage simple and inexpensive be produced.
- the task is in a high-pressure fuel storage for a Common rail fuel injection system of an internal combustion engine, according to the preamble of claim 1 by the characterizing Characteristics of claim 1 solved.
- the mobility of the Fuel lines in the connector significantly improved. Due to the better mobility can production and assembly-related tolerances are compensated. It also leads the elasticity of the intermediate piece to the fact that the contact pressure due to seating at the contact surfaces between High-pressure fuel storage and intermediate piece on the one hand and Intermediate piece and high-pressure fuel line, on the other hand, only in reduced to a very small extent. Because of that from the Bracing the fuel line resulting radial forces of the retaining nut or the intermediate piece is recorded is a lateral expansion of the high-pressure fuel line or the Intermediate piece prevents, so that the contact force on the at the assembly set by tightening the retaining nut value remains.
- a particular embodiment of the invention is characterized characterized in that the intermediate piece substantially the shape a hollow cylinder having two conical faces, with complementary end faces on the fuel line and interact with the high-pressure fuel storage.
- the conical faces By the conical faces, a good sealing effect is achieved when the complementary end faces are braced against each other.
- Another particular embodiment of the invention is characterized characterized in that at the connecting piece an external thread is provided, with the internal thread of a Retaining nut so cooperates with the fuel line its free end against the intermediate piece, and the intermediate piece is clamped against the high-pressure fuel storage.
- Another particular embodiment of the invention is characterized characterized in that the to the high-pressure fuel storage turned and facing away from the high-pressure fuel storage Rejuvenate the end of the intermediate piece, and that on the retaining nut formed a radial support surface for the fuel line is. Due to the symmetrical shape of the intermediate piece is simplifies its installation, because the fitter does not pay attention must, how around the intermediate piece in the connection piece is used.
- the intermediate piece has an asymmetrical shape, it could be at the end facing the fuel line through the complementary end face of the fuel line expanded become. Such expansion is thereby prevented that the intermediate piece at least with a part of his outer circumferential surface on the inner peripheral surface of Supported connection piece.
- Another particular embodiment of the invention is characterized in that the connecting pieces to the High-pressure fuel storage are welded.
- FIG. 1 In the accompanying figure is a section of a Fuel high pressure accumulator according to the invention in Longitudinal section shown.
- the illustrated High-pressure fuel tank is made of a tubular Basic body 1 with an elongated, circular cylindrical interior 6 is formed.
- the interior 6 of the tubular body 1 is above a Cross connection 7, a connector 2 and a High-pressure fuel line 10 with a (not shown) injector of an internal combustion engine in Connection:
- connection point On the tubular base body. 1 a connection point is provided for each injector. About that There are also other connection points for the Fuel supply, pressure sensors, etc. on the tubular Basic body 1 is provided.
- the connector 2 has the shape of a stepped Circular cylinder with two sections, the have different diameters. At the section with the smaller diameter is the external thread educated. The end face of the section with the larger diameter is using a welded joint 3 fixedly connected to the tubular body 1.
- the intermediate piece 9 has the Form of a hollow cylinder and is using a Retaining nut 11 between the fuel line 10 and the clamped tubular body 1. For this purpose works the internal thread of the retaining nut 11 with the external thread of the connector 2 together. In the assembled state the fuel line 10 extends through a circular recess 18, the center in the retaining nut 11th is provided.
- connection piece 2 the intermediate piece 9, the Fuel line 10 and the retaining nut 11 is around rotationally symmetrical parts.
- Left and right of the Rotation axis 19 are two different Embodiments of the invention shown.
- the tapered Intermediate piece 9 When on the left side of the axis of rotation 19 illustrated embodiment, the tapered Intermediate piece 9 at its from the tubular body 1 facing away from the end 12.
- the tapered end 12 of the Intermediate piece 9 acts with a complementary sealing cone 13 on the fuel line 10 together.
- a support surface 14 formed on a collar 17th is present at the end of the fuel line 10th is trained.
- a annular clamping surface 15 is formed on the front side of the retaining nut 11 .
- the Clamping surface 15 is the on the fuel line 10th trained sealing cone 13 against the tapered end-12 of the intermediate piece 9 pressed.
- a dash 16 is indicated that the Fuel line 10 in the assembled state by one Angle of about 10 ° can be deflected.
- the embodiment shown is that of the tubular Base 1 opposite end 22 of the intermediate piece. 9 funnel-shaped. At the funnel-shaped end 22 of the intermediate piece 9 is a complementary Sealing cone 23 in plant, at the end of the fuel line 10 is formed. To a widening of the intermediate piece. 9 to avoid in this area is at the connector 2 a support surface 24 provided on the outer periphery of the intermediate piece 9 is present.
- the bracing of the intermediate piece 9 between the Fuel line 10 and the tubular body 1 is achieved by a clamping surface 25, which at the Retaining nut 11 is formed.
- a dash 26 is indicated that also in this embodiment a sufficient deflection of the fuel line 10 in built-in state is possible.
- the mobility of the fuel line 10 is determined by the small distance between the sealing cone 13, 23 at the end of Fuel line 10 and the clamping surface 15, 25th guaranteed.
- the size of the recess 18 must be adequately sized.
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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
Description
Die Erfindung betrifft einen Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine, mit mehreren Anschlussstücken für Kraftstoffleitungen.The invention relates to a high-pressure fuel storage for a Common rail fuel injection system of an internal combustion engine, with several fittings for fuel lines.
In Common-Rail-Einspritzsystemen fördert eine Hochddruckpumpe, 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 delivers possibly with the aid of a prefeed pump, the Fuel to be injected from a tank in the central High-pressure fuel storage, referred to as common rail becomes. From the rail lead fuel lines to the individual Injectors associated with the cylinders of the internal combustion engine are. The injectors are dependent on the Operating parameters of the internal combustion engine individually from the Engine electronics controlled to fuel in the combustion chamber of the Inject internal combustion engine. By the High-pressure fuel storage systems are the pressure generation and the Injection decoupled from each other.
Ein herkömmlicher Kraftstoffhochdruckspeicher ist z.B. in der DE 196 06 946 A1 beschrieben. Der bekannte Kraftstoffhochdruckspeicher besteht aus einem langgestreckten, rohrförmigen Körper mit mehreren A conventional high pressure fuel storage is e.g. in the DE 196 06 946 A1. The known High-pressure fuel storage consists of an elongated, tubular body with several
Anschlüssen zur Versorgung der Injektoren. Die Enden der Kraftstoffleitungen sind in den Anschlussstücken des Kraftstoffhochdruckspeichers nur eingeschränkt beweglich. Damit bei der Montage des Kraftstoffhochdruckspeichers an der Brennkraftmaschine eine ausreichende Beweglichkeit der Kraftstoffleitungen in den Anschlussstücken des Kraftstoffhochdruckspeichers gewährleistet werden kann, sind zwischen dem Kraftstoffhochdruckspeicher und den Kraftstoffleitungen Zwischenstücke vorgesehen.Connections for supplying the injectors. The ends of the Fuel lines are in the fittings of the High-pressure fuel storage only limited mobility. In order to during assembly of the high-pressure fuel accumulator to the Internal combustion engine sufficient mobility of the Fuel lines in the fittings of the Fuel high pressure accumulator can be guaranteed are between the high-pressure fuel storage and the Fuel lines intermediate pieces provided.
Aufgabe der Erfindung ist es, einen Kraftstoffhochdruckspeicher der eingangs geschilderten Art so auszubilden, dass die Enden der Kraftstoffleitungen in den Anschlussstücken ausreichend beweglich sind. Trotz der ausreichenden Beweglichkeit soll die Dichtigkeit an den Anschlussstellen auch bei hohen Drücken gewährleistet sein. Darüber hinaus soll der erfindungsgemäße Kraftstoffhochdruckspeicher einfach aufgebaut und kostengünstig herstellbar sein.The object of the invention is a high-pressure fuel storage the type described above in such a way that the ends the fuel lines in the fittings sufficient are mobile. Despite the sufficient mobility, the Tightness at the connection points even at high pressures to be guaranteed. In addition, the inventive High-pressure fuel storage simple and inexpensive be produced.
Die Aufgabe ist bei einem Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine, nach dem Oberbegriff des Anspruchs 1 durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The task is in a high-pressure fuel storage for a Common rail fuel injection system of an internal combustion engine, according to the preamble of claim 1 by the characterizing Characteristics of claim 1 solved.
Durch das Zwischenstück wird die Beweglichkeit der Kraftstoffleitungen in dem Anschlussstück erheblich verbessert. Durch die bessere Beweglichkeit können fertigungs- und montagebedingte Toleranzen ausgeglichen werden. Außerdem führt die Elastizität des Zwischenstücks dazu, dass die Anpresskraft sich aufgrund von Setzvorgängen an den Kontaktflächen zwischen Kraftstoffhochdruckspeicher und Zwischenstück einerseits sowie Zwischenstück und Kraftstoffhochdruckleitung andererseits nur in sehr geringem Umfang verringert. Dadurch, dass die aus dem Verspannen der Kraftstoffleitung resultierenden Radialkräfte von der Haltemutter oder dem Zwischenstück aufgenommen werden, wird ein seitliches Aufweiten der Kraftstoffhochdruckleitung bzw. des Zwischenstück verhindert, so dass die Anpresskraft auf dem bei der Montage durch Anziehen der Haltemutter eingestellten Wert verbleibt.Through the intermediate piece, the mobility of the Fuel lines in the connector significantly improved. Due to the better mobility can production and assembly-related tolerances are compensated. It also leads the elasticity of the intermediate piece to the fact that the contact pressure due to seating at the contact surfaces between High-pressure fuel storage and intermediate piece on the one hand and Intermediate piece and high-pressure fuel line, on the other hand, only in reduced to a very small extent. Because of that from the Bracing the fuel line resulting radial forces of the retaining nut or the intermediate piece is recorded is a lateral expansion of the high-pressure fuel line or the Intermediate piece prevents, so that the contact force on the at the assembly set by tightening the retaining nut value remains.
Eine besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass das Zwischenstück im Wesentlichen die Form eines Hohlzylinders mit zwei konischen Stirnflächen aufweist, die mit komplementären Stirnflächen an der Kraftstoffleitung und dem Kraftstoffhochdruckspeicher zusammenwirken. Durch die konischen Stirnflächen wird eine gute Dichtwirkung erzielt, wenn die komplementären Stirnflächen gegeneinander verspannt werden.A particular embodiment of the invention is characterized characterized in that the intermediate piece substantially the shape a hollow cylinder having two conical faces, with complementary end faces on the fuel line and interact with the high-pressure fuel storage. By the conical faces, a good sealing effect is achieved when the complementary end faces are braced against each other.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass an dem Anschlussstück ein Außengewinde vorgesehen ist, das mit dem Innengewinde einer Haltemutter so zusammenwirkt, dass die Kraftstoffleitung mit ihrem freien Ende gegen das Zwischenstück, und das Zwischenstück gegen den Kraftstoffhochdruckspeicher verspannt wird. Durch die Haltemutter wird eine schnelle Montage der Kraftstoffleitungen an dem Kraftstoffhochdruckspeicher ermöglicht.Another particular embodiment of the invention is characterized characterized in that at the connecting piece an external thread is provided, with the internal thread of a Retaining nut so cooperates with the fuel line its free end against the intermediate piece, and the intermediate piece is clamped against the high-pressure fuel storage. By the Retaining nut will allow quick assembly of fuel lines allows the high-pressure fuel storage.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass sich das zu dem Kraftstoffhochdruckspeicher gewandte und das von dem Kraftstoffhochdruckspeicher abgewandte Ende des Zwischenstücks verjüngen, und dass an der Haltemutter eine radiale Abstützfläche für die Kraftstoffleitung ausgebildet ist. Durch die symmetrische Gestalt des Zwischenstücks wird dessen Montage vereinfacht, weil der Monteur nicht darauf achten muss, wie herum das Zwischenstück in das Anschlussstück eingesetzt wird.Another particular embodiment of the invention is characterized characterized in that the to the high-pressure fuel storage turned and facing away from the high-pressure fuel storage Rejuvenate the end of the intermediate piece, and that on the retaining nut formed a radial support surface for the fuel line is. Due to the symmetrical shape of the intermediate piece is simplifies its installation, because the fitter does not pay attention must, how around the intermediate piece in the connection piece is used.
Wenn das Zwischenstück eine asymmetrische Gestalt aufweist, könnte es an der zu der Kraftstoffleitung gewandten Stirnfläche durch die komplementäre Stirnfläche der Kraftstoffleitung aufgeweitet werden. Eine solche Aufweitung wird dadurch verhindert, dass sich das Zwischenstück zumindest mit einem Teil seiner äußeren Mantelfläche an der inneren Umfangsfläche des Anschlussstücks abstützt.If the intermediate piece has an asymmetrical shape, it could be at the end facing the fuel line through the complementary end face of the fuel line expanded become. Such expansion is thereby prevented that the intermediate piece at least with a part of his outer circumferential surface on the inner peripheral surface of Supported connection piece.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass die Anschlussstücke an den Kraftstoffhochdruckspeicher angeschweißt sind. Diese Ausführungsart liefert den Vorteil, dass die Abdichtung zur Umgebung direkt an dem Kraftstoffhochdruckspeicher erfolgt. Die Schnittstelle zwischen dem Anschlussstück.und dem Kraftstoffhochdruckspeicher muss nicht hochdruckdicht ausgelegt werden. Dadurch werden Kosten bei der Herstellung eingespart.Another particular embodiment of the invention is characterized in that the connecting pieces to the High-pressure fuel storage are welded. These Embodiment provides the advantage that the seal to Environment takes place directly at the high-pressure fuel storage. The interface between the Anschluss.und the High-pressure fuel storage does not have to be high-pressure-tight be interpreted. This will cost in the production saved.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung zwei 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 be apparent from the following description in which with reference to the drawing two Embodiments of the invention described in detail are. It can in the claims and in the Description mentioned features each individually or be essential to the invention in any combination.
In der beiliegenden Figur ist ein Ausschnitt eines
erfindungsgemäßen Kraftstoffhochdruckspeichers im
Längsschnitt dargestellt. Der dargestellte
Kraftstoffhochdruckspeicher wird von einem rohrförmigen
Grundkörper 1 mit einem langgestreckten,
kreiszylinderförmigen Innenraum 6 gebildet. Der Innenraum 6
des rohrförmigen Grundkörpers 1 steht über eine
Querverbindung 7, ein Anschlussstück 2 und eine
Kraftstoffhochdruckleitung 10 mit einem (nicht
dargestellten) Injektor einer Brennkraftmaschine in
Verbindung:In the accompanying figure is a section of a
Fuel high pressure accumulator according to the invention in
Longitudinal section shown. The illustrated
High-pressure fuel tank is made of a tubular
Basic body 1 with an elongated,
circular
Aus Gründen der Übersichtlichkeit ist in der dargestellten Figur nur eine Anschlussstelle dargestellt. Selbstverständlich ist an dem rohrförmigen Grundkörper 1 für jeden Injektor eine Anschlussstelle vorgesehen. Darüber hinaus sind noch weitere Anschlussstellen für die Kraftstoffzufuhr, Drucksensoren usw. an dem rohrförmigen Grundkörper 1 vorgesehen.For the sake of clarity is shown in the Figure only one connection point shown. Of course, on the tubular base body. 1 a connection point is provided for each injector. About that There are also other connection points for the Fuel supply, pressure sensors, etc. on the tubular Basic body 1 is provided.
Das Anschlussstück 2 hat die Form eines gestuften
Kreishohlzylinders mit zwei Abschnitten, die
unterschiedliche Durchmesser aufweisen. An dem Abschnitt
mit dem kleineren Durchmesser ist das Außengewinde
ausgebildet. Die Stirnfläche des Abschnitts mit dem
größeren Durchmesser ist mit Hilfe einer Schweißverbindung
3 fest mit dem rohrförmigen Grundkörper 1 verbunden.The
Innerhalb des Anschlussstücks 2 ist an dem rohrförmigen
Grundkörper 1 konzentrisch eine Erhöhung 4 in Form einer
runden Scheibe ausgebildet. Im Zentrum der Erhöhung 4
befindet sich eine trichterförmige Öffnung 5, die in die
Querverbindung 7 mündet.Within the
An der trichterförmigen Öffnung 5 des rohrförmigen
Grundkörpers 1 liegt ein sich verjüngendes Ende 8 eines
Zwischenstücks 9 druckdicht an. Das Zwischenstück 9 hat die
Form eines Hohlzylinders und wird mit Hilfe einer
Haltemutter 11 zwischen der Kraftstoffleitung 10 und dem
rohrförmigen Grundkörper 1 verspannt. Zu diesem Zweck wirkt
das Innengewinde der Haltemutter 11 mit dem Außengewinde
des Anschlussstücks 2 zusammen. Im zusammengebauten Zustand
erstreckt sich die Kraftstoffleitung 10 durch eine
kreisrunde Aussparung 18, die mittig in der Haltemutter 11
vorgesehen ist.At the funnel-shaped opening 5 of the tubular
Body 1 is a tapered end 8 of a
Bei dem Anschlussstück 2, dem Zwischenstück 9, der
Kraftstoffleitung 10 und der Haltemutter 11 handelt es sich
um rotationssymmetrische Teile. Links und rechts der
Rotationsachse 19 sind zwei unterschiedliche
Ausführungsformen der Erfindung dargestellt.In the
Bei der auf der linken Seite der Rotationsachse 19
dargestellten Ausführungsform verjüngt sich das
Zwischenstück 9 an seinem von dem rohrförmigen Grundkörper
1 abgewandten Ende 12. Das sich verjüngende Ende 12 des
Zwischenstücks 9 wirkt mit einem komplementären Dichtkonus
13 an der Kraftstoffleitung 10 zusammen. Um ein Aufweiten
des an dem Zwischenstück anliegenden Endes der
Kraftstoffleitung 10 zu verhindern, ist an der Haltemutter
11 eine Abstützfläche 14 ausgebildet, die an einem Bund 17
anliegt, der an dem Ende der Kraftstoffleitung 10
ausgebildet ist.When on the left side of the axis of
Außerdem ist an der Stirnseite der Haltemutter 11 eine
kreisringförmige Spannfläche 15 ausgebildet. Über die
Spannfläche 15 wird der an der Kraftstoffleitung 10
ausgebildete Dichtkonus 13 gegen das sich verjüngende Ende-12
des Zwischenstücks 9 gedrückt. Darüberhinaus wird das
sich verjüngende Ende 8 des Zwischenstücks 9 in die
trichterförmige Öffnung 5 des rohrförmigen Grundkörpers 1
gedrückt. Durch einen Strich 16 ist angedeutet, dass die
Kraftstoffleitung 10 im zusammengebauten Zustand um einen
Winkel von etwa 10° ausgelenkt werden kann.In addition, on the front side of the retaining nut 11 a
Ein wesentlicher Aspekt der vorliegenden Erfindung ist
darin zu sehen, dass das Innere der Kraftstoffleitung 10
über das Zwischenstück 9 mit dem Innenraum 6 des
rohrförmigen Grundkörpers 1 hochdruckdicht verbunden ist,
ohne dass die Verbindung zwischen dem Anschlussstück 2 und
dem rohrförmigen Grundkörper 1 hochdruckdicht ausgelegt
werden muss. Dennoch ist im eingebauten Zustand eine
ausreichende Beweglichkeit der Kraftstoffleitung 10
gegeben, wie durch den Strich 16 angedeutet ist. An essential aspect of the present invention is
can be seen in that the interior of the fuel line 10th
via the
Bei der auf der rechten Seite der Rotationsachse 19
dargestellten Ausführungsform ist das von dem rohrförmigen
Grundkörper 1 abgewandte Ende 22 des Zwischenstücks 9
trichterförmig ausgebildet. An dem trichterförmigen Ende 22
des Zwischenstücks 9 befindet sich ein komplementärer
Dichtkonus 23 in Anlage, der am Ende der Kraftstoffleitung
10 ausgebildet ist. Um eine Aufweitung des Zwischenstücks 9
in diesem Bereich zu vermeiden, ist an dem Anschlussstück 2
eine Abstützfläche 24 vorgesehen, die an dem äußeren Umfang
des Zwischenstücks 9 anliegt.When on the right side of the axis of
Das Verspannen des Zwischenstücks 9 zwischen der
Kraftstoffleitung 10 und dem rohrförmigen Grundkörper 1
wird durch eine Spannfläche 25 erreicht, die an der
Haltemutter 11 ausgebildet ist. Durch einen Strich 26 ist
angedeutet, dass auch bei dieser Ausführungsform eine
ausreichende Auslenkung der Kraftstoffleitung 10 im
eingebauten Zustand möglich ist.The bracing of the
Die Beweglichkeit der Kraftstoffleitung 10 wird durch den
geringen Abstand zwischen dem Dichtkonus 13, 23 am Ende der
Kraftstoffleitung 10 und der Spannfläche 15, 25
gewährleistet. Außerdem muss die Größe der Aussparung 18
ausreichend bemessen sein.The mobility of the
Claims (5)
- High pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a plurality of connecting elements (2) for fuel lines (10), wherein in each case an intermediate element (9) is arranged in the connecting elements (2) between the high pressure fuel accumulator (1) and the fuel lines (10), wherein that end (12) of the intermediate element (9) which faces away from the high pressure fuel accumulator (1) tapers (12) or has a funnel shape (22), and having a securing nut (11) for pressing a fuel line (10) against that end (12) of the intermediate element (9) which faces away from the high pressure fuel accumulator (1), characterized in that the fuel line (10) is supported directly and in the radial direction on a support face (14) of the securing nut (11) in the region of the tapering part of the intermediate element (9), or in that the intermediate element (9) is supported directly and in the radial direction on a support face (24) of the connector (9) in the region of the funnel-shaped end (22).
- High pressure fuel accumulator according to Claim 1, characterized in that the intermediate element (9) essentially has the shape of a hollow cylinder with two conical end faces (8; 12, 22) which interact with complementary end faces (5; 13, 22) on the high pressure fuel accumulator (1) and the associated fuel line (10).
- High pressure fuel accumulator according to one of the preceding claims, characterized in that an external thread is provided on the connecting element (2), which external thread interacts with the internal thread of the securing nut (11) in such a way that the fuel line (10) is clamped by its free end against the intermediate element (9), and the intermediate element (9) is clamped against the high pressure fuel accumulator (1).
- High pressure fuel accumulator according to one of the preceding claims, characterized in that that end (8) of the intermediate element (9) which faces the high pressure fuel accumulator (1) tapers.
- High pressure fuel accumulator according to one of the preceding claims, characterized in that the connecting elements (2) are welded onto the high pressure fuel accumulator (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19936535 | 1999-08-03 | ||
| DE19936535A DE19936535A1 (en) | 1999-08-03 | 1999-08-03 | High pressure fuel accumulator |
| PCT/DE2000/002528 WO2001009506A1 (en) | 1999-08-03 | 2000-08-01 | High pressure fuel accumulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1117925A1 EP1117925A1 (en) | 2001-07-25 |
| EP1117925B1 true EP1117925B1 (en) | 2005-11-09 |
Family
ID=7917045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00962180A Expired - Lifetime EP1117925B1 (en) | 1999-08-03 | 2000-08-01 | High pressure fuel accumulator |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6609502B1 (en) |
| EP (1) | EP1117925B1 (en) |
| JP (1) | JP4518459B2 (en) |
| KR (1) | KR100727505B1 (en) |
| AT (1) | ATE309463T1 (en) |
| CZ (1) | CZ296998B6 (en) |
| DE (2) | DE19936535A1 (en) |
| WO (1) | WO2001009506A1 (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19959105A1 (en) * | 1999-12-08 | 2001-06-21 | Bosch Gmbh Robert | Connection piece and housing, in particular high-pressure fuel accumulator, with prestressed welded connection piece for a fuel injection system for internal combustion engines |
| DE10125439A1 (en) | 2001-05-25 | 2002-11-28 | Bosch Gmbh Robert | High pressure connecting device comprises two breech block threads having thread flanks formed perpendicular to the longitudinal axis of the internal thread and lying against each other in a force-locking manner |
| DE10154645A1 (en) * | 2001-11-07 | 2003-06-12 | Siemens Ag | Method for producing a fuel storage line with a prestressed connector |
| US6789528B2 (en) * | 2002-04-05 | 2004-09-14 | Denso Corporation | High pressure fuel supply device having plating layer and manufacturing method thereof |
| DE10221653A1 (en) * | 2002-05-15 | 2003-12-04 | Siemens Ag | Connection arrangement with integrated throttle |
| US6886537B2 (en) * | 2002-07-04 | 2005-05-03 | Denso Corporation | Accumulation type fuel injection system for engine |
| JP4032383B2 (en) * | 2002-09-25 | 2008-01-16 | 臼井国際産業株式会社 | FUEL RAIL, FUEL RAIL MAIN TUBE AND METHOD FOR PRODUCING THE SAME |
| JP2004211637A (en) * | 2003-01-07 | 2004-07-29 | Denso Corp | High pressure fuel accumulator |
| JP4438450B2 (en) * | 2003-04-07 | 2010-03-24 | 株式会社デンソー | Piping joint device and assembly method thereof |
| JP4075838B2 (en) | 2003-06-27 | 2008-04-16 | 株式会社デンソー | Piping joint device |
| DE10333721B4 (en) * | 2003-07-23 | 2005-07-07 | Benteler Automobiltechnik Gmbh | Fuel rail with a connection piece |
| FR2869652B1 (en) * | 2004-04-28 | 2006-07-07 | Renault Sas | HIGH PRESSURE SEALING DEVICE |
| EP1600626A1 (en) * | 2004-05-28 | 2005-11-30 | Siemens VDO Automotive S.p.A. | Connecting system |
| FR2872252B1 (en) * | 2004-06-25 | 2008-03-14 | Senior Automotive Blois Sas So | CONNECTING DEVICE |
| JP2006233964A (en) * | 2005-01-28 | 2006-09-07 | Usui Kokusai Sangyo Kaisha Ltd | Common rail for diesel engine |
| EP1752655B1 (en) * | 2005-07-08 | 2007-09-05 | C.R.F. Società Consortile per Azioni | A device for connection between a rail for fuel under pressure and at least one injector, for an internal-combustion engine |
| DE112009000126T5 (en) | 2008-01-14 | 2010-12-09 | Millennium Industries Corp., Ligonier | Device for coupling components of a fuel delivery system |
| DE102008013575B3 (en) | 2008-03-11 | 2009-08-13 | Poppe & Potthoff Gmbh | Fuel rail assembly |
| EP2154407A1 (en) * | 2008-07-25 | 2010-02-17 | J.M. Martin Tiby | Tubing configuration and sealing method for high pressure tubing on high pressure fuel system |
| JP4794645B2 (en) * | 2009-04-09 | 2011-10-19 | 株式会社オティックス | Fuel delivery pipe |
| US8322004B2 (en) * | 2009-04-29 | 2012-12-04 | Caterpilar Inc. | Indirect laser induced residual stress in a fuel system component and fuel system using same |
| US8042519B2 (en) * | 2009-07-31 | 2011-10-25 | Ford Global Technologies, Llc | Common rail fuel system with integrated diverter |
| EP2295786B1 (en) * | 2009-08-04 | 2016-04-13 | Wärtsilä Schweiz AG | Connection arrangement |
| DE102009051065B3 (en) * | 2009-10-28 | 2011-01-20 | Benteler Automobiltechnik Gmbh | Fuel distributor |
| JP2011133006A (en) * | 2009-12-24 | 2011-07-07 | Toyota Motor Corp | Pipe joint structure |
| DE102010043366A1 (en) * | 2010-11-04 | 2012-05-10 | Robert Bosch Gmbh | Device for media-tight connection of two high-pressure components |
| EP2466110B1 (en) * | 2010-12-15 | 2015-02-25 | Continental Automotive GmbH | Fluid fitting arrangement and fluid system |
| DE102011052907A1 (en) * | 2011-08-23 | 2012-11-22 | L'orange Gmbh | High pressure terminal connection for use between high pressure fuel line and pipe connector in fuel injection system of e.g. diesel engine, has sealing part whose installation zone rests against front surface of pipe |
| DE202013103710U1 (en) | 2013-08-15 | 2013-08-29 | Ti Automotive (Heidelberg) Gmbh | Fuel rail |
| TR201718697A2 (en) * | 2017-11-24 | 2019-06-21 | Bosch Sanayi Ve Tic A S | A TEST DEVICE FOR FUEL INJECTION VALVES |
| DE102019116392A1 (en) * | 2019-06-17 | 2020-12-17 | Profil Verbindungstechnik Gmbh & Co. Kg | Method for attaching a fastener to a workpiece |
| US10995720B1 (en) * | 2020-07-29 | 2021-05-04 | Delphi Technologies Ip Limited | Fuel system having a connection between a fuel injector and a fuel distribution conduit |
| DE102023000408B3 (en) | 2023-02-09 | 2024-07-25 | Deutz Aktiengesellschaft | Connection arrangement for connecting a fuel line to an injector of an internal combustion engine |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03177694A (en) * | 1989-09-27 | 1991-08-01 | Usui Internatl Ind Co Ltd | Branch connected body connecting structure in high pressure fuel rail |
| JP2529032Y2 (en) * | 1990-05-22 | 1997-03-12 | 臼井国際産業株式会社 | Connection structure of branch pipe in high pressure fuel manifold |
| JP2803383B2 (en) * | 1991-04-08 | 1998-09-24 | トヨタ自動車株式会社 | High pressure fluid fittings |
| DE19531743C1 (en) * | 1995-08-29 | 1996-12-05 | Guido Jurgen | Pressure tester for e.g. fuel injection pipe |
| DE19606946C2 (en) * | 1996-02-23 | 1998-02-19 | Mtu Friedrichshafen Gmbh | Connection of a high-pressure fuel line to a fixed connection point |
| DE19607521C1 (en) * | 1996-02-28 | 1997-04-10 | Juergen Dipl Ing Guido | High-pressure fuel pipe, for diesel engine with common-rail system |
| JPH09303232A (en) * | 1996-05-09 | 1997-11-25 | Toyota Motor Corp | Injection pipe connecting structure of common rail type diesel engine |
| JP3882964B2 (en) * | 1996-11-30 | 2007-02-21 | 臼井国際産業株式会社 | Connection structure of branch connection in common rail |
| GB2319824B (en) * | 1996-11-30 | 2001-01-10 | Usui Kokusai Sangyo Kk | Joint structure for branch connectors in common rails |
| DE19747736C1 (en) * | 1997-10-29 | 1999-04-08 | Siemens Ag | Pressure reservoir for IC engine common-rail fuel injection supply system |
-
1999
- 1999-08-03 DE DE19936535A patent/DE19936535A1/en not_active Ceased
-
2000
- 2000-08-01 JP JP2001513749A patent/JP4518459B2/en not_active Expired - Fee Related
- 2000-08-01 DE DE50011560T patent/DE50011560D1/en not_active Expired - Lifetime
- 2000-08-01 KR KR1020017004184A patent/KR100727505B1/en not_active IP Right Cessation
- 2000-08-01 AT AT00962180T patent/ATE309463T1/en not_active IP Right Cessation
- 2000-08-01 US US09/806,675 patent/US6609502B1/en not_active Expired - Fee Related
- 2000-08-01 WO PCT/DE2000/002528 patent/WO2001009506A1/en active IP Right Grant
- 2000-08-01 EP EP00962180A patent/EP1117925B1/en not_active Expired - Lifetime
- 2000-08-01 CZ CZ20011140A patent/CZ296998B6/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE19936535A1 (en) | 2001-02-15 |
| CZ296998B6 (en) | 2006-08-16 |
| US6609502B1 (en) | 2003-08-26 |
| JP2003506611A (en) | 2003-02-18 |
| CZ20011140A3 (en) | 2002-01-16 |
| WO2001009506A1 (en) | 2001-02-08 |
| KR100727505B1 (en) | 2007-06-12 |
| DE50011560D1 (en) | 2005-12-15 |
| EP1117925A1 (en) | 2001-07-25 |
| JP4518459B2 (en) | 2010-08-04 |
| ATE309463T1 (en) | 2005-11-15 |
| KR20010075539A (en) | 2001-08-09 |
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