EP1137878B1 - High pressure fuel accumulator - Google Patents
High pressure fuel accumulator Download PDFInfo
- Publication number
- EP1137878B1 EP1137878B1 EP00967579A EP00967579A EP1137878B1 EP 1137878 B1 EP1137878 B1 EP 1137878B1 EP 00967579 A EP00967579 A EP 00967579A EP 00967579 A EP00967579 A EP 00967579A EP 1137878 B1 EP1137878 B1 EP 1137878B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure fuel
- circular cylindrical
- essentially circular
- cylindrical recesses
- longitudinal
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
Definitions
- the invention relates to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a tubular base body whose interior communicates with a plurality of terminals.
- 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 described for example in German Utility Model DE 295 21 402 U1.
- the known 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 high-pressure fuel storage according to the invention should be inexpensive to produce.
- a high-pressure fuel accumulator for a common-rail fuel injection system of an internal combustion engine having a tubular body whose interior communicates with a plurality of terminals, characterized in that the interior of at least two substantially circular cylindrical recesses is formed, which communicate with each other stand and their longitudinal axes are arranged parallel to each other, and in that the terminals only emanate from the lateral surface of one of the substantially circular cylindrical recesses.
- the high-pressure resistance of the high-pressure fuel accumulator is limited primarily by the intersections between the connection openings and the main body interior. On the transitions between the connection openings and the main body act during operation large forces.
- the functions of storing and distributing the main body interior are distributed to the two recesses. This makes it possible to optimally design with respect to the high-pressure resistance transitions between the body interior and the connection openings optimal. Independently of the connections in the area of the lateral surface of the circular-cylindrical recesses, it is additionally possible for connections to be provided on the end faces of the circular-cylindrical recesses, since there the intersection problem does not arise.
- a particular embodiment of the invention is characterized in that the two are substantially circular cylindrical recesses are interconnected by a connecting channel.
- Another particular embodiment of the invention is characterized in that the two substantially circular cylindrical recesses overlap in cross section.
- the overlap increases the available storage space without the formation of sharp edges, which are critical with regard to high pressure resistance.
- Another particular embodiment of the invention is characterized in that the two substantially circular-cylindrical recesses have the same diameter, and in that the connections are arranged only in the longitudinal direction of the main body interior cross-section.
- the deformation resulting from the high pressure prevailing in the interior of the main body during operation is, seen in cross section, perpendicular to the connections at the largest and thus occurs in a region which is not so highly loaded.
- Another particular embodiment of the invention is characterized in that the two substantially circular-cylindrical recesses have different diameters, and in that the connections only emanate from the lateral surface of the essentially circular-cylindrical recess with the smaller diameter.
- Another particular embodiment of the invention is characterized in that the distance between the longitudinal axes of the two substantially circular cylindrical recesses is greater than or equal to the radius of the substantially circular cylindrical recess with the larger diameter. This ensures that the storage volume of the high-pressure fuel storage according to the invention is increased.
- Another particular embodiment is characterized in that the transitions between the two substantially circular cylindrical recesses are rounded in cross section.
- the additional rounding leads to a further increase in the high-pressure resistance of the high-pressure fuel accumulator according to the invention.
- the high-pressure fuel accumulator shown in longitudinal section in Figure 1 comprises a tubular body 1. On the tubular body 1 are four Connecting pieces 2, 3, 4 and 5 formed. The connecting pieces 2, 3, 4 and 5 are used to connect high-pressure fuel lines.
- the high-pressure fuel lines establish a connection between the interior of the tubular main body 1 and a high-pressure fuel pump (not shown) or with the injectors (not shown) of the internal combustion engine to be supplied.
- first longitudinal bore 11 is formed by a first longitudinal bore 11 and a second longitudinal bore 12.
- the longitudinal bores 11 and 12 are arranged parallel to each other.
- the first longitudinal bore 11 has a diameter d 1 , which is significantly larger than the diameter d 2 of the second longitudinal bore 12.
- the distance between the parallel center lines of the two longitudinal bores 11 and 12 is greater than the radius but smaller than the diameter d 1 of the first longitudinal bore eleventh
- connection bore 13 is arranged radially in the base body 1 and opens into the second longitudinal bore 12.
- the transition 14 between the first longitudinal bore 11 and the second longitudinal bore 12 is rounded.
- the first longitudinal bore 11 in the tubular base body 1 fulfills the function of storing fuel during operation of the high-pressure fuel accumulator according to the invention.
- the second longitudinal bore 12 in the tubular base body 1 fulfills the function of distributing the fuel during operation of the high-pressure fuel accumulator according to the invention.
- FIGS. 3 to 8 differ mainly in the construction and arrangement of the individual elements. Therefore, in order to avoid repetition, in the following description of these embodiments, only the differences between the individual embodiments will be discussed. For simplicity, the same reference numerals will be used to designate like parts.
- the high-pressure fuel accumulator shown in cross section in FIG. 3 has, like the previously described embodiment, a tubular basic body 1 with two parallel longitudinal bores 11 and 12.
- the second longitudinal bore 12 has a smaller diameter d 2 than the first longitudinal bore 11 (d 1 ).
- the transition 14 between the two longitudinal bores 11 and 12 is rounded.
- connection bore 13 opens tangentially into the first and the second longitudinal bore 11 and 12.
- the distance between the center lines of the longitudinal bores 11 and 12 corresponds to the radius of the first longitudinal bore 11.
- connection bore 13 extends in a different direction as the connection bore 13 in the embodiment shown in Figure 3.
- the connection bores 13 are arranged offset in the embodiments shown in Figures 3 and 4 by 90 ° to each other.
- a third longitudinal bore 15 arranged in parallel in the tubular base body 1.
- the third longitudinal bore 15 has a diameter d 3rd
- the diameter d 3 is smaller than the diameter d 2 , which in turn is smaller than the diameter d 1 .
- the connection bore 13 opens into the longitudinal bore 15 with the diameter d 3 .
- connection bore 13 does not open, as in the embodiment shown in Figure 2 tangentially into the second connection hole 12 but, as can be seen in Figure 6, tangentially into the first connection hole 11.
- the holes are arranged so that the connection bore 13 eccentric and smooth out of the first longitudinal bore 11 comes out.
- connection hole 13 opens tangentially.
- the transition region between the two longitudinal bores 11 and 12 is flat.
- first longitudinal bore 11 and the second longitudinal bore 12 are formed separately in the tubular base body 1.
- the longitudinal bores 11 and 12 are connected by a connecting bore with the diameter d 4 .
- the Connecting bore opens tangentially into both longitudinal bores 11 and 12.
- the connecting bore 13 has a diameter d 5 , which is greater than the diameter d 4 of the connecting bore.
- the connection bore 13 opens tangentially into the second longitudinal bore 12.
- the connection bore 13 extends in the same direction as the connection bore between the two longitudinal bores 11 and 12.
Description
Die Erfindung betrifft einen Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine, mit einem rohrförmigen Grundkörper, dessen Innenraum mit mehreren Anschlüssen in Verbindung steht.The invention relates to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a tubular base body whose interior communicates with a plurality of terminals.
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. im deutschen Gebrauchsmuster DE 295 21 402 U1 beschrieben. Der bekannte Kraftstoffhochdruckspeicher hält Drücke von bis zu etwa 1100 bar aus.A conventional high-pressure fuel storage is described for example in German Utility Model DE 295 21 402 U1. The known high-pressure fuel storage can withstand pressures of up to about 1100 bar.
Aufgabe der Erfindung ist es, die Hochdruckfestigkeit des bekannten Kraftstoffhochdruckspeichers mit einfachen Maßnahmen zu erhöhen. Darüberhinaus soll der erfindungsgemäße Kraftstoffhochdruckspeicher kostengünstig herstellbar sein.The object of the invention is to increase the high pressure resistance of the known high-pressure fuel storage with simple measures. In addition, the high-pressure fuel storage according to the invention should be inexpensive to produce.
Die Aufgabe ist bei einem Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine, mit einem rohrförmigen Grundkörper, dessen Innenraum mit mehreren Anschlüssen in Verbindung steht, dadurch gelöst, dass der Innenraum von mindestens zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen gebildet wird, die miteinander in Verbindung stehen und deren Längsachsen parallel zueinander angeordnet sind, und dadurch, dass die Anschlüsse nur von der Mantelfläche einer der im Wesentlichen kreiszylinderförmigen Ausnehmungen ausgehen. Im Rahmen der vorliegenden Erfindung hat sich herausgestellt, dass die Hochdruckfestigkeit des Kraftstoffhochdruckspeichers primär durch die Verschneidungen zwischen den Anschlussöffnungen und dem Grundkörperinnenraum beschränkt wird. Auf die Übergänge zwischen den Anschlussöffnungen und dem Grundkörper wirken im Betrieb große Kräfte. Gemäß der vorliegenden Erfindung werden die Funktionen Speichern und Verteilen des Grundkörperinnenraums auf die zwei Ausnehmungen verteilt. Dadurch ist es möglich, die bezüglich der Hochdruckfestigkeit besonders kritischen Übergänge zwischen dem Grundkörperinnenraum und den Anschlussöffnungen optimal zu gestalten. Unabhängig von den Anschlüssen im Bereich der Mantelfläche der kreiszylinderförmigen Ausnehmungen können zusätzlich auch Anschlüsse an den Stirnseiten der kreiszylinderförmigen Ausnehmungen vorgesehen sein, da dort die Verschneidungsproblematik nicht auftritt.The object is achieved in a high-pressure fuel accumulator for a common-rail fuel injection system of an internal combustion engine, having a tubular body whose interior communicates with a plurality of terminals, characterized in that the interior of at least two substantially circular cylindrical recesses is formed, which communicate with each other stand and their longitudinal axes are arranged parallel to each other, and in that the terminals only emanate from the lateral surface of one of the substantially circular cylindrical recesses. In the context of the present invention, it has been found that the high-pressure resistance of the high-pressure fuel accumulator is limited primarily by the intersections between the connection openings and the main body interior. On the transitions between the connection openings and the main body act during operation large forces. According to the present invention, the functions of storing and distributing the main body interior are distributed to the two recesses. This makes it possible to optimally design with respect to the high-pressure resistance transitions between the body interior and the connection openings optimal. Independently of the connections in the area of the lateral surface of the circular-cylindrical recesses, it is additionally possible for connections to be provided on the end faces of the circular-cylindrical recesses, since there the intersection problem does not arise.
Eine besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass die zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen durch einen Verbindungskanal miteinander verbunden sind. Durch die Trennung der beiden kreiszylinderförmigen Ausnehmungen voneinander wird erreicht, dass Druckstöße nicht von der einen in die andere kreiszylinderförmige Ausnehmung übergehen.A particular embodiment of the invention is characterized in that the two are substantially circular cylindrical recesses are interconnected by a connecting channel. By separating the two circular cylindrical recesses from each other is achieved that pressure surges do not pass from one to the other circular cylindrical recess.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass sich die zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen im Querschnitt überlappen. Durch die Überlappung wird der zur Verfügung stehende Speicherraum vergrößert, ohne dass es zur Ausbildung von scharfen Kanten kommt, die kritisch bezüglich der Hochdruckfestigkeit sind.Another particular embodiment of the invention is characterized in that the two substantially circular cylindrical recesses overlap in cross section. The overlap increases the available storage space without the formation of sharp edges, which are critical with regard to high pressure resistance.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass die zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen gleiche Durchmesser aufweisen, und dadurch, dass die Anschlüsse nur in Längsrichtung des Grundkörperinnenraumquerschnitts angeordnet sind. Die sich aus den im Betrieb herrschenden Hochdruck im Inneren des Grundkörpers ergebende Verformung ist, im Querschnitt betrachtet, senkrecht zu den Anschlüssen am Größten und tritt somit in einem Bereich auf, der nicht so hoch belastet ist.Another particular embodiment of the invention is characterized in that the two substantially circular-cylindrical recesses have the same diameter, and in that the connections are arranged only in the longitudinal direction of the main body interior cross-section. The deformation resulting from the high pressure prevailing in the interior of the main body during operation is, seen in cross section, perpendicular to the connections at the largest and thus occurs in a region which is not so highly loaded.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass die zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen unterschiedliche Durchmesser aufweisen, und dadurch, dass die Anschlüsse nur von der Mantelfläche der im Wesentlichen kreiszylinderförmigen Ausnehmung mit dem kleineren Durchmesser ausgehen. Dadurch wird der Übergang zwischen dem Innenraum des rohrförmigen Grundkörpers und den Anschlüssen entschärft und die Hochdruckfestigkeit des erfindungsgemäßen Krafstoffhochdruckspeichers verbessert.Another particular embodiment of the invention is characterized in that the two substantially circular-cylindrical recesses have different diameters, and in that the connections only emanate from the lateral surface of the essentially circular-cylindrical recess with the smaller diameter. As a result, the transition between the interior of the tubular base body and the terminals is defused and improves the high-pressure resistance of the high-pressure fuel storage according to the invention.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass der Abstand zwischen den Längsachsen der zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen größer oder gleich dem Radius der im Wesentlichen kreiszylinderförmigen Ausnehmung mit dem größeren Durchmesser ist. Dadurch wird erreicht, dass das Speichervolumen des erfindungsgemäßen Krafstoffhochdruckspeichers vergrößert wird.Another particular embodiment of the invention is characterized in that the distance between the longitudinal axes of the two substantially circular cylindrical recesses is greater than or equal to the radius of the substantially circular cylindrical recess with the larger diameter. This ensures that the storage volume of the high-pressure fuel storage according to the invention is increased.
Eine weitere besondere Ausführungsart ist dadurch gekennzeichnet, dass die Übergänge zwischen den zwei im Wesentlichen kreiszylinderförmigen Ausnehmungen im Querschnitt verrundet sind. Das zusätzliche Verrunden führt zu einer weiteren Steigerung der Hochdruckfestigkeit des erfindungsgemäßen Kraftstoffhochdruckspeichers.Another particular embodiment is characterized in that the transitions between the two substantially circular cylindrical recesses are rounded in cross section. The additional rounding leads to a further increase in the high-pressure resistance of the high-pressure fuel accumulator according to the invention.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene 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. In der Zeichnung zeigen:
Figur 1- die Darstellung eines erfindungsgemäßen Kraftstoffhochdruckspeichers im Längsschnitt und
- die
Figuren 2 bis 8 - verschiedene Ausführungsformen der erfindungsgemäßen Kraftstoffhochdruckspeichers im Querschnitt entlang der Linie II-II in
Figur 1.
- FIG. 1
- the representation of a high-pressure fuel storage according to the invention in longitudinal section and
- FIGS. 2 to 8
- various embodiments of the high-pressure fuel storage according to the invention in cross section along the line II-II in Figure 1.
Der in Figur 1 im Längsschnitt dargestellte Kraftstoffhochdruckspeicher umfasst einen rohrförmigen Grundkörper 1. An dem rohrförmigen Grundkörper 1 sind vier Anschlussstutzen 2, 3, 4 und 5 ausgebildet. Die Anschlussstutzen 2, 3, 4 und 5 dienen zum Anschluss von Kraftstoffhochdruckleitungen. Die Kraftstoffhochdruckleitungen stellen eine Verbindung zwischen dem Inneren des rohrförmigen Grundkörpers 1 und einer (nicht dargestellten) Kraftstoffhochdruckpumpe bzw. mit den (nicht dargestellten) Injektoren der zu versorgenden Brennkraftmaschine her.The high-pressure fuel accumulator shown in longitudinal section in Figure 1 comprises a
Bei dem in Figur 2 dargestellten Querschnitt sieht man, dass der Innenraum des rohrförmigen Grundkörpers 1 von einer ersten Längsbohrung 11 und einer zweiten Längsbohrung 12 gebildet wird. Die Längsbohrungen 11 und 12 sind parallel zueinander angeordnet. Die erste Längsbohrung 11 hat einen Durchmesser d1, der deutlich größer als der Durchmesser d2 der zweiten Längsbohrung 12 ist. Der Abstand zwischen den parallelen Mittellinien der beiden Längsbohrungen 11 und 12 ist größer als der Radius aber kleiner als der Durchmesser d1 der ersten Längsbohrung 11.In the cross section shown in Figure 2 it can be seen that the interior of the
Eine Anschlussbohrung 13 ist radial in dem Grundkörper 1 angeordnet und mündet in die zweite Längsbohrung 12. Der Übergang 14 zwischen der ersten Längsbohrung 11 und der zweiten Längsbohrung 12 ist verrundet.A
Die erste Längsbohrung 11 in dem rohrförmigen Grundkörper 1 erfüllt im Betrieb des erfindungsgemäßen Kraftstoffhochdruckspeichers die Funktion Kraftstoff speichern. Die zweite Längsbohrung 12 in dem rohrförmigen Grundkörper 1 erfüllt im Betrieb des erfindungsgemäßen Kraftstoffhochdruckspeichers die Funktion Verteilen des Kraftstoffs. Durch die Trennung der Funktionen Kraftstoff speichern und Kraftstoff verteilen kann die Festigkeit des erfindungsgemäßen Kraftstoffhochdruckspeichers erhöht werden.The first
Die in den Figuren 3 bis 8 dargestellten Ausführungsformen der Erfindung unterscheiden sich hauptsächlich im Aufbau und in der Anordnung der einzelnen Elemente. Deshalb wird, um Wiederholungen zu vermeiden, in der folgenden Beschreibung dieser Ausführungsbeispiele nur auf die Unterschiede zwischen den einzelnen Ausführungsformen eingegangen. Der Einfachheit halber werden zur Bezeichnung gleicher Teile die selben Bezugszeichen verwendet.The embodiments of the invention illustrated in FIGS. 3 to 8 differ mainly in the construction and arrangement of the individual elements. Therefore, in order to avoid repetition, in the following description of these embodiments, only the differences between the individual embodiments will be discussed. For simplicity, the same reference numerals will be used to designate like parts.
Der in Figur 3 im Querschnitt dargestellte Kraftstoffhochdruckspeicher weist, wie die vorab geschilderte Ausführungsform, einen rohrförmigen Grundkörper 1 mit zwei parallelen Längsbohrungen 11 und 12 auf. Die zweite Längsbohrung 12 weist einen kleineren Durchmesser d2 als die erste Längsbohrung 11 (d1) auf. Der Übergang 14 zwischen den beiden Längsbohrungen 11 und 12 ist verrundet.The high-pressure fuel accumulator shown in cross section in FIG. 3 has, like the previously described embodiment, a tubular
Bei der in Figur 3 dargestellten Ausführungsform mündet die Anschlussbohrung 13 tangential in die erste und die zweite Längsbohrung 11 und 12. Der Abstand zwischen den Mittellinien der Längsbohrungen 11 und 12 entspricht dem Radius der ersten Längsbohrung 11.In the embodiment shown in FIG. 3, the connection bore 13 opens tangentially into the first and the second
Bei der in Figur 4 dargestellten Ausführungsform ist der Abstand der Mittellinien der beiden Längsbohrungen 11 und 12 etwas größer als der Radius der ersten Längsbohrung 11. Darüberhinaus verläuft die Anschlussbohrung 13 in einer anderen Richtung wie die Anschlussbohrung 13 bei der in Figur 3 dargestellten Ausführungsform. Die Anschlussbohrungen 13 sind bei den in den Figuren 3 und 4 dargestellten Ausführungsformen um 90° versetzt zueinander angeordnet.In the embodiment shown in Figure 4, the distance between the center lines of the two
Bei der in Figur 5 dargestellten Ausführungsform ist neben der ersten und der zweiten Längsbohrung 11 und 12 noch eine dritte Längsbohrung 15 parallel in dem rohrförmigen Grundkörper 1 angeordnet. Die dritte Längsbohrung 15 hat einen Durchmesser d3. Der Durchmesser d3 ist kleiner als der Durchmesser d2, der wiederum kleiner als der Durchmesser d1 ist. Die Anschlussbohrung 13 mündet in die Längsbohrung 15 mit dem Durchmesser d3.In the embodiment shown in Figure 5 in addition to the first and the second
Die in Figur 6 dargestellte Ausführungsform ähnelt der in Figur 2 dargestellten Ausführungsform. Die Anschlussbohrung 13 mündet jedoch nicht, wie bei der in Figur 2 dargestellten Ausführungsform tangential in die zweite Anschlussbohrung 12 sondern, wie in Figur 6 zu sehen ist, tangential in die erste Anschlussbohrung 11. Die Bohrungen sind so angeordnet, dass die Anschlussbohrung 13 exzentrisch und glatt aus der ersten Längsbohrung 11 herauskommt.The embodiment shown in Figure 6 is similar to the embodiment shown in Figure 2. However, the connection bore 13 does not open, as in the embodiment shown in Figure 2 tangentially into the
Bei der in Figur 7 dargestellten Ausführungsform der Erfindung sind in dem rohrförmigen Grundkörper 1 zwei Längsbohrungen 11 und 12 mit dem gleichen Durchmesser d1 angebracht. In die Längsbohrung 12 mündet die Anschlussbohrung 13 tangential. Der Übergangsbereich zwischen den beiden Längsbohrungen 11 und 12 ist eben ausgebildet.In the embodiment of the invention shown in FIG. 7, two
Unter Hochdruck verformt sich der von den beiden Längsbohrungen gebildete Innenraum des Grundkörpers 1 senkrecht zu der Anschlussbohrung 13 am meisten. Der Bereich der exzentrischen Anschlussbohrung 13 wird dadurch nicht zu hoch belastet.Under high pressure, the interior of the
Bei der in Figur 8 dargestellten Ausführungsform sind die erste Längsbohrung 11 und die zweite Längsbohrung 12 separat in dem rohrförmigen Grundkörper 1 ausgebildet. Die Längsbohrungen 11 und 12 sind durch eine Verbindungsbohrung mit dem Durchmesser d4 miteinander verbunden. Die Verbindungsbohrung mündet tangential in beide Längsbohrungen 11 und 12. Die Anschlussbohrung 13 hat einen Durchmesser d5, der größer als der Durchmesser d4 der Verbindungsbohrung ist. Die Anschlussbohrung 13 mündet tangential in die zweite Längsbohrung 12. Die Anschlussbohrung 13 verläuft in der gleichen Richtung wie die Verbindungsbohrung zwischen den beiden Längsbohrungen 11 und 12.In the embodiment shown in FIG. 8, the first
Claims (7)
- High-pressure fuel store for a common rail fuel injection system of an internal combustion engine, having a tubular basic body (1) whose interior (11, 12, 15) is connected to a plurality of connections (2 to 5, 13), characterized in that the interior is formed by at least two essentially circular cylindrical recesses (11, 12, 15) which are connected to one another and whose longitudinal axes are arranged parallel to one another, and in that the connections (13) issue only from the circumferential surface of one of the essentially circular cylindrical recesses (11, 12 15).
- High-pressure fuel store according to Claim 1, characterized in that the two essentially circular cylindrical recesses (11, 12) are connected to each other by a connecting duct.
- High-pressure fuel store according to claim 1, characterized in that the two essentially circular cylindrical recesses (11, 12) overlap in cross section.
- High-pressure fuel store according to one of the preceding Claims, characterized in that the two essentially circular cylindrical recesses (11, 12) have the same diameters, and in that the connections (13) are arranged only in the longitudinal direction of the cross section of the basic-body interior.
- High-pressure fuel store according to one of Claims 1 to 3, characterized in that the two essentially circular cylindrical recesses (11, 12) have different diameters (d1, d2), and in that the connections (13) issue only from the circumferential surface of the essentially circular cylindrical recess (12) having the smaller diameter (d2).
- High-pressure fuel store according to Claim 5, characterized in that the distance between the longitudinal axes of the two essentially circular cylindrical recesses (11, 12) is greater than or equal to the radius of the essentially circular cylindrical recess (11) having the larger diameter (d1).
- High-pressure fuel store according to Claim 5 or 6, characterized in that the transitions (14) between the two essentially circular cylindrical recesses (11, 12, 15) are rounded in cross section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19948339 | 1999-10-07 | ||
| DE19948339A DE19948339C1 (en) | 1999-10-07 | 1999-10-07 | High pressure fuel reservoir for common-rail fuel injection system for i.c. engine provided by hollow tubular body with its interiror space provided by coupled or overlapping cylindrical recesses |
| PCT/DE2000/003245 WO2001025615A1 (en) | 1999-10-07 | 2000-09-19 | High pressure fuel accumulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1137878A1 EP1137878A1 (en) | 2001-10-04 |
| EP1137878B1 true EP1137878B1 (en) | 2006-06-07 |
Family
ID=7924831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00967579A Expired - Lifetime EP1137878B1 (en) | 1999-10-07 | 2000-09-19 | High pressure fuel accumulator |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6637407B1 (en) |
| EP (1) | EP1137878B1 (en) |
| JP (1) | JP4445690B2 (en) |
| CZ (1) | CZ295449B6 (en) |
| DE (2) | DE19948339C1 (en) |
| WO (1) | WO2001025615A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10128715B4 (en) * | 2001-05-04 | 2005-09-22 | Mtu Friedrichshafen Gmbh | High-pressure fuel line |
| DE10146741A1 (en) * | 2001-09-22 | 2003-04-17 | Bosch Gmbh Robert | High-pressure fuel storage |
| DE10152261A1 (en) * | 2001-10-20 | 2003-04-30 | Bosch Gmbh Robert | High pressure accumulators like high pressure fuel accumulators |
| FI116158B (en) | 2002-04-08 | 2005-09-30 | Waertsilae Finland Oy | Piston engine fuel supply system |
| DE10248800A1 (en) * | 2002-10-19 | 2004-04-29 | Robert Bosch Gmbh | Internal pressure-loaded component and method for producing an internal pressure-loaded component with a non-cylindrical cross section |
| DE50302044D1 (en) * | 2002-10-23 | 2006-02-02 | Waertsilae Nsd Schweiz Ag | Pressure accumulator for a common rail system |
| DE10305078A1 (en) * | 2003-02-07 | 2004-04-22 | Robert Bosch Gmbh | High pressure fuel store for common rail fuel injection system has connecting boring made with beveled widening |
| DE10329052A1 (en) | 2003-06-27 | 2005-01-13 | Robert Bosch Gmbh | Connection of high-pressure chamber in a high-pressure body of injection system for fuel, comprises cylindrical pocket or a circular groove formed in the high-pressure chamber of the body |
| JP2005140058A (en) * | 2003-11-07 | 2005-06-02 | Denso Corp | Common-rail |
| US7021291B2 (en) * | 2003-12-24 | 2006-04-04 | Cummins Inc. | Juncture for a high pressure fuel system |
| FI120844B (en) * | 2007-05-31 | 2010-03-31 | Waertsilae Finland Oy | Fuel supply system fuel storage |
| DE102007045922A1 (en) | 2007-09-26 | 2009-04-02 | Bayer Cropscience Ag | Drug combinations with insecticidal and acaricidal properties |
| EP2204574B1 (en) | 2008-12-23 | 2012-03-07 | Delphi Technologies Holding S.à.r.l. | Fuel injection system |
| JP2011069255A (en) * | 2009-09-24 | 2011-04-07 | Daihatsu Motor Co Ltd | Fuel delivery pipe for internal combustion engine |
| JP2011069254A (en) * | 2009-09-24 | 2011-04-07 | Daihatsu Motor Co Ltd | Fuel delivery pipe for internal combustion engine |
| EP2511517B1 (en) * | 2011-04-15 | 2015-04-01 | Wärtsilä Schweiz AG | A high pressure fluid rail |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29521402U1 (en) * | 1995-12-23 | 1997-04-24 | Bosch Gmbh Robert | Fuel injection system |
| JP3841370B2 (en) * | 1996-12-07 | 2006-11-01 | 臼井国際産業株式会社 | Common rail |
| DE19728111A1 (en) * | 1997-07-02 | 1999-01-07 | Bosch Gmbh Robert | Fuel injection system |
| DE10006894A1 (en) * | 1999-02-18 | 2000-08-24 | Usui Kokusai Sangyo Kk | Fuel supply line arrangement |
| DE19945786C1 (en) * | 1999-09-24 | 2000-11-16 | Bosch Gmbh Robert | High pressure fuel store for a motor common rail fuel injection system has a body containing two circular cylinder chambers with a connection between them for increased strength under high pressures |
| DE19953577A1 (en) * | 1999-11-08 | 2001-05-23 | Bosch Gmbh Robert | High pressure fuel accumulator |
-
1999
- 1999-10-07 DE DE19948339A patent/DE19948339C1/en not_active Expired - Fee Related
-
2000
- 2000-09-19 EP EP00967579A patent/EP1137878B1/en not_active Expired - Lifetime
- 2000-09-19 JP JP2001528323A patent/JP4445690B2/en not_active Expired - Fee Related
- 2000-09-19 CZ CZ20011995A patent/CZ295449B6/en not_active IP Right Cessation
- 2000-09-19 DE DE50012917T patent/DE50012917D1/en not_active Expired - Lifetime
- 2000-09-19 US US09/857,630 patent/US6637407B1/en not_active Expired - Fee Related
- 2000-09-19 WO PCT/DE2000/003245 patent/WO2001025615A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001025615A1 (en) | 2001-04-12 |
| CZ295449B6 (en) | 2005-08-17 |
| DE19948339C1 (en) | 2000-12-14 |
| DE50012917D1 (en) | 2006-07-20 |
| JP4445690B2 (en) | 2010-04-07 |
| JP2003511605A (en) | 2003-03-25 |
| CZ20011995A3 (en) | 2002-05-15 |
| US6637407B1 (en) | 2003-10-28 |
| EP1137878A1 (en) | 2001-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1137878B1 (en) | High pressure fuel accumulator | |
| EP3607197A1 (en) | Fuel common rail | |
| EP1049868B1 (en) | Pump system for supplying fuel at high pressure | |
| EP1144852A1 (en) | Method for producing a high pressure fuel accumulator | |
| EP1131554B1 (en) | High pressure fuel accumulator | |
| WO2001009508A1 (en) | High pressure reservoir for fuel | |
| EP1144854B1 (en) | High pressure fuel storage device | |
| EP1423601B1 (en) | High pressure fuel accumulator for an accumulator injection system | |
| WO2001011226A1 (en) | High-pressure fuel accumulator | |
| EP1435454A1 (en) | Part bearing inner pressure, especially for fuel injection in a combustion engine with a high pressure fuel pump | |
| EP2167810B1 (en) | High-pressure fuel accumulator | |
| WO2004076850A1 (en) | Blind hole and seat hole injection nozzle for an internal combustion engine, comprising a transition cone between the blind hole and the nozzle needle seat | |
| EP2536948B1 (en) | Cylinder head for a high-pressure fuel pump | |
| DE10132245A1 (en) | Flameproof high pressure plenum | |
| WO2007073984A1 (en) | Component for use in fuel injection systems | |
| EP1260704A1 (en) | Accumulator fuel injection system with high pressure components having an increased mechanical strength | |
| EP1256713A2 (en) | Injection device for an accumulator-injection system comprising an accumulator separated from fuel distributor | |
| DE102019204150A1 (en) | High pressure accumulator for fuels, fuel system | |
| DE102012004935B4 (en) | Common rail | |
| DE10161920A1 (en) | Diesel engine modular high pressure fuel reservoir | |
| WO2003027484A1 (en) | High-pressure fuel accumulator | |
| DE102015205703A1 (en) | Fuel injection valve for internal combustion engines and use of a fuel injection valve | |
| WO2003048563A1 (en) | High-pressure fuel accumulator and method for producing such a high-pressure fuel accumulator | |
| DE102010030423A1 (en) | Injector i.e. common-rail-injector, has transition region comprising conical hole region on side facing bore portion, where cone angle is in specific range in relation to longitudinal axis of transition region |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 20011012 |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 50012917 Country of ref document: DE Date of ref document: 20060720 Kind code of ref document: P |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20060920 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20070308 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20090922 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20091120 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20090925 Year of fee payment: 10 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100919 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100919 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20110531 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50012917 Country of ref document: DE Effective date: 20110401 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110401 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100919 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20091005 Year of fee payment: 10 |