EP1049868B1 - Pump system for supplying fuel at high pressure - Google Patents
Pump system for supplying fuel at high pressure Download PDFInfo
- Publication number
- EP1049868B1 EP1049868B1 EP99906058A EP99906058A EP1049868B1 EP 1049868 B1 EP1049868 B1 EP 1049868B1 EP 99906058 A EP99906058 A EP 99906058A EP 99906058 A EP99906058 A EP 99906058A EP 1049868 B1 EP1049868 B1 EP 1049868B1
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- EP
- European Patent Office
- Prior art keywords
- high pressure
- pressure
- pump
- fuel
- ducts
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/08—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
- F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Definitions
- the invention relates to a pump arrangement for High pressure fuel supply at Fuel injection systems of internal combustion engines, especially with a common rail injection system a pump housing, which comprises several pump elements, in which fuel is subjected to high pressure, the high pressure fuel over a High pressure duct system from the individual pump elements to a common high-pressure connection bore is promoted.
- the invention is therefore based on the problem that High-pressure duct routing between the individual To optimize pump elements and the high pressure connection. In particular, voltage peaks in the Borehole intersections can be minimized.
- the problem is with a pump arrangement High pressure fuel supply at Fuel injection systems of internal combustion engines, especially with a common rail injection system a pump housing, which comprises several pump elements, in which fuel is subjected to high pressure, the high pressure fuel over a High pressure duct system from the individual pump elements to a common high-pressure connection bore is promoted, solved in that the high pressure duct system several High pressure channels includes that with the pump elements in Connected and arranged on a different level are as the common high pressure connection hole in the the high pressure ducts meet.
- the high pressure channels in one level can be used for each High pressure valve the same parts are used.
- the common high pressure connection hole in a different level than the high pressure ducts High pressure channels eccentric to the Hit the high pressure connection hole.
- the Center lines of the high pressure ducts do not match the Cut the center line of the high pressure connection hole. Thereby become the stress peaks in the intersections reduced.
- This has the advantage that a Fatigue strength of the pump housing even at pressures of up to up to 2000 bar is guaranteed.
- the Pump arrangement according to the invention the advantage that it can be produced inexpensively.
- Another special embodiment of the invention is characterized in that at least one of the High pressure channels in the outlet of the high pressure connection bore flows out, which is spherical. Through the spherical formation of the high pressure connection bore can Bore intersections realized with larger angles than with bores made with conventional drills be generated. There are also additional notches in the outlet the high pressure connection hole avoided.
- Another special embodiment of the invention is characterized in that the high pressure channels Penetrate blind holes off-center. This will Tensions reduced.
- the present invention generally provides the advantage that large diameter differences between the High pressure ducts and the high pressure connection hole fluidically cheap can be realized.
- the pump arrangement according to the invention can for example be a radial piston pump.
- Radial piston pumps are especially in common rail injection systems Fuel supply used for diesel engines.
- there "common rail” means “common line”, “common rail” or “common rail”.
- common rail means "common line", “common rail” or “common rail”.
- the pump elements of a radial piston pump can be from cylinder spaces arranged radially to a drive shaft are formed, in which a piston back and forth is movably received.
- the pistons are used Fuel in the cylinder rooms at high pressure apply.
- the high pressure fuel is then a high pressure duct system and a High pressure connection in the common manifold promoted.
- a high-pressure pump is shown in section in FIG.
- a pump housing part 2 In a pump housing part 2 are three blind holes 3, 4 and 5 shown, which holes not shown are each connected to one of the pump elements (see also Figure 2). Perpendicular to blind holes 3, 4 and 5 run two high pressure channels 6 and 7.
- the High-pressure duct 6 connects the blind holes 3 and 4 with each other and penetrates a high pressure connection hole 8, whose diameter is larger than the diameter of the High-pressure channels.
- the high pressure channels 6 and 7 run in one plane, the corresponds to the drawing level in FIG. 1. Like from the Sectional representations of Figures 2 and 3 can be seen, extends the high pressure connection bore 8 in one Plane parallel to the high pressure channels 6 and 7. The distance of the parallel planes is chosen so that the High pressure channel 6, the high pressure connection bore 8 in penetrates essentially tangentially in FIG see that the outer surface of the high pressure channel 6th on the one hand the lateral surface of the high pressure connection bore affected and on the other hand almost perpendicular to the Shell surface of the high pressure connection bore hits.
- the high pressure channel 7 connects the blind hole 5 with the High-pressure connection bore 8.
- the high-pressure duct opens 7, as can be seen from the section shown in FIG. 3, off-center and essentially tangential in the High pressure connection hole 8.
- the high pressure channels 6 and 7 the blind holes 3, 4 and 5 also substantially penetrate tangentially and off-center.
- the High-pressure connection bore 8 has a spherical outlet 11.
- the embodiment shown in Figure 1 has an outlet 10 which tapers to an angle of approx. 120 ° and from comes from a normal drill tip.
- the angle is ⁇ between the high pressure channel 7 and the outlet 10 of the High pressure connection hole 8 approx. 60 °.
- the Angle ⁇ between the high pressure channel 7 and the outlet 11 the high pressure connection bore 8 is approximately 75 °, which in Terms of the level of tension at the Borehole intersection and fluidically favorable.
Description
Die Erfindung betrifft eine Pumpenanordnung zur Kraftstoffhochdruckversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen, insbesondere bei einem Common-Rail-Einspritzsystem, mit einem Pumpengehäuse, das mehrere Pumpenelemente umfaßt, in denen Kraftstoff mit Hochdruck beaufschlagt wird, wobei der mit Hochdruck beaufschlagte Kraftstoff über ein Hochdruckkanalsystem von den einzelnen Pumpenelementen zu einer gemeinsamen Hochdruckanschlußbohrung gefördert wird.The invention relates to a pump arrangement for High pressure fuel supply at Fuel injection systems of internal combustion engines, especially with a common rail injection system a pump housing, which comprises several pump elements, in which fuel is subjected to high pressure, the high pressure fuel over a High pressure duct system from the individual pump elements to a common high-pressure connection bore is promoted.
Eine Anordnung gemäß Oberbegriff des Anspruchs 1 zeigt die US-A-5546912. In modernen Kraftstoffeinspritzsystemen von Brennkraftmaschinen, insbesondere in Common-Rail-Einspritzsystemen von Dieselmotoren, treten Kaftstoffdrücke von bis zu 2000 bar auf. Diesen hohen Kraftstoffdrücken sind herkömmliche Pumpenanordnungen oft nicht gewachsen.An arrangement according to the preamble of claim 1 shows US-A-5546912. In modern fuel injection systems from Internal combustion engines, in particular in common rail injection systems of diesel engines, caffeine pressures occur from up to 2000 bar. These high fuel pressures conventional pump arrangements are often unable to cope.
Bei einer herkömmlichen Pumpenanordnung sind bei Drücken bis zu 2000 bar in Förderrichtung unzulässig hohe Spannungen in dem Hochdruckkanalsystem, vor allem an den Schnittstellen der einzelnen Kanäle, festgestellt worden.In a conventional pump arrangement, at pressures up to 2000 bar in the direction of conveyance impermissibly high Tensions in the high pressure duct system, especially on the Interfaces of the individual channels have been determined.
Der Erfindung liegt daher das Problem zugrunde, die Hochdruckkanalführung zwischen den einzelnen Pumpenelementen und dem Hochdruckanschluß zu optimieren. Insbesondere sollen Spannungsspitzen in den Bohrungsverschneidungen minimiert werden. The invention is therefore based on the problem that High-pressure duct routing between the individual To optimize pump elements and the high pressure connection. In particular, voltage peaks in the Borehole intersections can be minimized.
Das Problem ist bei einer Pumpenanordnung zur Kraftstoffhochdruckversorgung bei Ktaftstoffeinspritzsystemen von Brennkrafcmaschinen, insbesondere bei einem Common-Rail-Einspritzsystem, mit einem Pumpengehäuse, das mehrere Pumpenelemente umfaßt, in denen Kraftstoff mit Hochdruck beaufschlagt wird, wobei der mit Hochdruck beaufschlagte Kraftstoff über ein Hochdruckkanalsystem von den einzelnen Pumpenelementen zu einer gemeinsamen Hochdruckanschlußbohrung gefördert wird, dadurch gelöst, daß das Hochdruckkanalsystem mehrere Hochdruckkanäle umfaßt, die mit den Pumpenelementen in Verbindung stehen und in einer anderen Ebene angeordnet sind als die gemeinsame Hochdruckanschlußbohrung, in der die Hochdruckkanäle zusammentreffen. Durch die Anordnung der Hochdruckkanäle in einer Ebene können für jedes Hochdruckventil die gleichen Teile verwendet werden. Durch die Anordnung der gemeinsamen Hochdruckanschlußbohrung in einer anderen Ebene als die Hochdruckkanäle können die Hochdruckkanäle exzentrisch auf die Hochdruckanschlußbohrung treffen. Das bedeutet, daß sich die Mittellinien der Hochdruckkanäle nicht mit der Mittellinie der Hochdruckanschlußbohrung schneiden. Dadurch werden die Spannungsspitzen in den Bohrungsverschneidungen reduziert. Das liefert den Vorteil, daß eine Dauerfestigkeit des Pumpengehäuses auch bei Drücken von bis zu 2000 bar gewährleistet ist. Darüber hinaus hat die erfindungsgemäße Pumpenanordnung den Vorteil, daß sie kostengünstig hergestellt werden kann.The problem is with a pump arrangement High pressure fuel supply at Fuel injection systems of internal combustion engines, especially with a common rail injection system a pump housing, which comprises several pump elements, in which fuel is subjected to high pressure, the high pressure fuel over a High pressure duct system from the individual pump elements to a common high-pressure connection bore is promoted, solved in that the high pressure duct system several High pressure channels includes that with the pump elements in Connected and arranged on a different level are as the common high pressure connection hole in the the high pressure ducts meet. By the arrangement The high pressure channels in one level can be used for each High pressure valve the same parts are used. By the arrangement of the common high pressure connection hole in a different level than the high pressure ducts High pressure channels eccentric to the Hit the high pressure connection hole. That means that the center lines of the high pressure ducts do not match the Cut the center line of the high pressure connection hole. Thereby become the stress peaks in the intersections reduced. This has the advantage that a Fatigue strength of the pump housing even at pressures of up to up to 2000 bar is guaranteed. In addition, the Pump arrangement according to the invention the advantage that it can be produced inexpensively.
Eine besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, daß mindestens einer der Hochdruckkanäle die Hochdruckanschlußbohrung an der Außenseite im wesentlichen tangential durchdringt. Die Ebene mit dem Hochdruckanschluß ist dabei gegenüber der Ebene mit den Hochdruckkanälen soweit verschoben, daß der Hochdruckkanal die Hochdruckanschlußbohrung außermittig, tangential durchdringt. Dadurch werden Totwassergebiete an den Schnittstellen vermieden. Das liefert neben günstigeren Strömungsbedingungen den Vorteil, daß eine optimale Reinigung des Hochdruckkanalsystems in der Fertigung gewährleistet ist. Unter den Begriffen "tangential" und "tangiert" ist im Sinne der vorliegenden Erfindung eine Option zu verstehen, die nicht unbedingt erfüllt werden muß. In der Konstruktion sind Fertigungstoleranzen (Winkel, Position, Geradheit, Durchmesser) zu berücksichtigen. Da die Bohrungen aus Festigkeitsgründen nicht die Mantelfläche der Querbohrungen anschneiden dürfen, muß konstruktiv für die maximale Toleranzlage vorgehalten werden. Eine Reduzierung der Spannungen wird bereits bei einer außermittigen Durchdringung der Bohrungen erreicht, die nicht zwangsläufig auch tangential sein muß.This is a special embodiment of the invention characterized in that at least one of the high pressure channels the high pressure connection hole on the outside in penetrates essentially tangentially. The level with the High pressure connection is opposite the level with the High pressure channels so far that the high pressure channel the high-pressure connection bore off-center, tangential penetrates. As a result, dead water areas at the Avoided interfaces. That delivers alongside cheaper ones Flow conditions have the advantage of being optimal Cleaning the high-pressure duct system in production is guaranteed. Under the terms "tangential" and For the purposes of the present invention, “tangent” is one Understand option that are not necessarily met got to. In the construction, manufacturing tolerances (angles, Position, straightness, diameter). There the holes for strength reasons not the outer surface the cross holes may cut, must be constructive for the maximum tolerance is maintained. A Reduction in tension is already at a reached eccentric penetration of the holes does not necessarily have to be tangential.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, daß mindestens einer der Hochdruckkanäle in dem Auslauf der Hochdruckanschlußbohrung mündet, der kugelförmig ausgebildet ist. Durch die kugelförmige Ausbildung der Hochdruckanschlußbohrung können Bohrungsverschneidungen mit größeren Winkeln realisiert werden als bei Bohrungen, die mit herkömmlichen Bohrern erzeugt werden. Zudem werden zusätzliche Kerben im Auslauf der Hochdruckanschlußbohrung vermieden.Another special embodiment of the invention is characterized in that at least one of the High pressure channels in the outlet of the high pressure connection bore flows out, which is spherical. Through the spherical formation of the high pressure connection bore can Bore intersections realized with larger angles than with bores made with conventional drills be generated. There are also additional notches in the outlet the high pressure connection hole avoided.
Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, daß die Hochdruckkanäle die Sacklöcher außermittig durchdringen. Dadurch werden Spannungen abgebaut.Another special embodiment of the invention is characterized in that the high pressure channels Penetrate blind holes off-center. This will Tensions reduced.
Die vorliegende Erfindung liefert allgemein den Vorteil, daß große Durchmesserdifferenzen zwischen den Hochdruckkanälen und der Hochdruckanschlußbohrung strömungstechnisch günstig realisiert werden können. The present invention generally provides the advantage that large diameter differences between the High pressure ducts and the high pressure connection hole fluidically cheap can be realized.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnungen zwei Ausführungsbeispiele 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.
- Figur 1
- zeigt einen Schnitt durch eine Pumpenanordnung
gemäß einer ersten Ausführungsform der
vorliegenden Erfindung, wobei der dargestellte
Schnitt entlang der Linie F-F in
Figur 2 verläuft; Figur 2- zeigt einen Schnitt entlang der Linie E-E in Figur 1;
Figur 3- zeigt eine vergrößerte Teilansicht eines Schnitts entlang der Linie G-G in Figur 1 im Maßstab 2:1;
Figur 4- zeigt einen Schnitt durch eine Pumpenanordnung
gemäß einer zweiten Ausführungsform der
vorliegenden Erfindung, wobei der dargestellte
Schnitt entlang der Linie F-F in
Figur 5 verläuft; Figur 5- zeigt einen Schnitt entlang der Linie E-E in
Figur 4; und Figur 6- zeigt eine vergrößerte Teilansicht eines Schnitts
entlang der Linie G-G in
Figur 4 im Maßstab 2:1.
- Figure 1
- shows a section through a pump arrangement according to a first embodiment of the present invention, the section shown along the line FF in Figure 2;
- Figure 2
- shows a section along the line EE in Figure 1;
- Figure 3
- shows an enlarged partial view of a section along the line GG in Figure 1 in scale 2: 1;
- Figure 4
- shows a section through a pump arrangement according to a second embodiment of the present invention, the section shown along the line FF in Figure 5;
- Figure 5
- shows a section along the line EE in Figure 4; and
- Figure 6
- shows an enlarged partial view of a section along the line GG in Figure 4 in scale 2: 1.
Die erfindungsgemäße Pumpenanordnung kann beispielsweise eine Radialkolbenpumpe sein. Radialkolbenpumpen werden insbesondere in Common-Rail-Einspritzsystemen zur Krafcstoffversorgung von Dieselmotoren eingesetzt. Dabei bedeutet "common rail" soviel wie "gemeinsame Leitung", "gemeinsame Schiene" oder "gemeinsame Verteilerleiste". Im Gegensatz zu herkömmlichen Hochdruckeinspritzsystemen, in denen der Kraftstoff über getrennte Leitungen zu den einzelnen Brennräumen gefördert wird, werden die Einspritzdüsen in Common-Rail-Einspritzsystemen aus einer gemeinsamen Leitung gespeist.The pump arrangement according to the invention can for example be a radial piston pump. Radial piston pumps are especially in common rail injection systems Fuel supply used for diesel engines. there "common rail" means "common line", "common rail" or "common rail". in the Contrary to conventional high pressure injection systems, in which the fuel to the separate lines individual combustion chambers is promoted Injectors in common rail injection systems from one fed common line.
Die Pumpenelemente einer Radialkolbenpumpe können von radial zu einer Antriebswelle angeordneten Zylinderräumen gebildet werden, in denen jeweils ein Kolben hin- und herbewegbar aufgenommen ist. Die Kolben dienen dazu, Kraftstoff in den Zylinderräumen mit Hochdruck zu beaufschlagen. Der mit Hochdruck beaufschlagte Kraftstoff wird dann über ein Hochdruckkanalsystem und einen Hochdruckanschluß in die gemeinsame Verteilerleiste gefördert.The pump elements of a radial piston pump can be from cylinder spaces arranged radially to a drive shaft are formed, in which a piston back and forth is movably received. The pistons are used Fuel in the cylinder rooms at high pressure apply. The high pressure fuel is then a high pressure duct system and a High pressure connection in the common manifold promoted.
In Figur 1 ist eine Hochdruckpumpe im Schnitt gezeigt. In
einem Pumpengehäuseteil 2 sind drei Sacklöcher 3, 4 und 5
dargestellt, welche über nicht dargestellte Bohrungen
jeweils mit einem der Pumpenelemente in Verbindung stehen
(siehe auch Figur 2). Senkrecht zu den Sacklöchern 3, 4 und
5 verlaufen zwei Hochdruckkanäle 6 und 7. Der
Hochdruckkanal 6 verbindet die Sacklöcher 3 und 4
miteinander und durchdringt eine Hochdruckanschlußbohrung
8, deren Durchmesser größer ist als der Durchmesser der
Hochdruckkanäle.A high-pressure pump is shown in section in FIG. In
a
Die Hochdruckkanäle 6 und 7 verlaufen in einer Ebene, die
der Zeichenebene in Figur 1 entspricht. Wie aus den
Schnittdarstellungen der Figuren 2 und 3 zu ersehen ist,
erstreckt sich die Hochdruckanschlußbohrung 8 in einer
Ebene parallel zu den Hochdruckkanälen 6 und 7. Der Abstand
der parallelen Ebenen ist so gewählt, daß der
Hochdruckkanal 6 die Hochdruckanschlußbohrung 8 im
wesentlichen tangential durchdringt In Figur 2 ist zu
sehen, daß die Mantelfläche des Hochdruckkanals 6
einerseits die Mantelfläche der Hochdruckanschlußbohrung
tangiert und andererseits fast senkrecht auf die
Mantelfläche der Hochdruckanschlußbohrung trifft.The
Der Hochdruckkanal 7 verbindet das Sackloch 5 mit der
Hochdruckanschlußbohrung 8. Dabei mündet der Hochdruckkanal
7, wie aus dem in Figur 3 dargestellten Schnitt hervorgeht,
außermittig und im wesentlichen tangential in die
Hochdruckanschlußbohrung 8.The
Es bleibt noch anzumerken, daß die Hochdruckkanäle 6 und 7
die Sacklöcher 3, 4 und 5 ebenfalls im wesentlichen
tangential und außermittig durchdringen.It remains to be noted that the
Die in den Figuren 4 bis 6 dargestellte Ausführungsform der vorliegenden Erfindung entspricht weitgehend der in den Figuren 1 bis 3 dargestellten Ausführungsform. Um Wiederholungen zu vermeiden wird in der folgenden Beschreibung hauptsächlich auf die Unterschiede zwischen beiden Ausführungsformen eingegangen. Dabei sind Teile, die in beiden Ausführungsformen vorkommen, der Einfachheit halber mit gleichen Bezugszeichen versehen.The embodiment shown in Figures 4 to 6 present invention largely corresponds to that in the Figures 1 to 3 illustrated embodiment. Around Avoid repetitions in the following Description mainly on the differences between received two embodiments. There are parts that occur in both embodiments, the simplicity for the sake of the same reference numerals.
Wie aus Figur 4 ersichtlich ist, hat die
Hochdruckanschlußbohrung 8 einen kugelförmigen Auslauf 11.
Die in Figur 1 gezeigte Ausführungsform hat einen Auslauf
10 der in einem Winkel von ca. 120° spitz zuläuft und von
einer normalen Bohrerspitze herrührt. Wie in dem in Figur 3
dargestellten Schnitt gezeigt ist, beträgt der Winkel α
zwischen dem Hochdruckkanal 7 und dem Auslauf 10 der
Hochdruckanschlußbohrung 8 ca. 60°. Im Vergleich dazu ist
in dem in Figur 6 dargestellten Schnitt gezeigt, daß der
Winkel α zwischen dem Hochdruckkanal 7 und dem Auslauf 11
der Hochdruckanschlußbohrung 8 ca. 75° beträgt, was in
Bezug auf die Höhe der Spannungen an der
Bohrungsverschneidung und strömungstechnisch günstiger ist.As can be seen from Figure 4, the
High-pressure connection bore 8 has a
Gemäß der vorliegenden Erfindung gehen sämtliche Hochdruckkanäle außermittig und im wesentlichen tangential in Hochdruckbohrungen mit größerem Durchmesser über. Die im wesentlichen tangentiale Durchdringung ist dabei realisiert, obwohl die Hochdruckkanäle in derselben Ebene angeordnet sind.All go according to the present invention High-pressure ducts off-center and essentially tangential in high-pressure holes with a larger diameter. The in there is substantial tangential penetration realized even though the high pressure ducts are on the same level are arranged.
Claims (4)
- Pump arrangement for the high-pressure supply of fuel in fuel injection systems of internal combustion engines, in particular in a common-rail injection system, with a pump casing (2) comprising a plurality of pump elements, in which fuel is subjected to high pressure, the fuel subjected to high pressure being conveyed via a high-pressure duct system from the individual pump elements to a common high-pressure connecting bore (8), characterized in that the high-pressure duct system comprises a plurality of high-pressure ducts (6, 7) which are connected to the pump elements and are arranged in a different plane from the common high-pressure connecting bore (8) in which the high-pressure ducts (6, 7) meet.
- Pump arrangement according to Claim 1, characterized in that at least one of the high-pressure ducts (6) passes through the high-pressure connecting bore (8) essentially tangentially on the outside.
- Pump arrangement according to one of the preceding claims, characterized in that at least one of the high-pressure ducts (7) issues in the spherically designed outflow (11) of the high-pressure connecting bore (8).
- Pump arrangement according to one of the preceding claims, characterized in that the high-pressure ducts (6 and 7) pass through the blind holes (3, 4, 5) eccentrically.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19802476A DE19802476A1 (en) | 1998-01-23 | 1998-01-23 | Pump fitting to supply fuel at high pressure for common rail fuel injection system of internal combustion engine |
| DE19802476 | 1998-01-23 | ||
| PCT/DE1999/000088 WO1999037910A1 (en) | 1998-01-23 | 1999-01-18 | Pump system for supplying fuel at high pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1049868A1 EP1049868A1 (en) | 2000-11-08 |
| EP1049868B1 true EP1049868B1 (en) | 2002-05-08 |
Family
ID=7855432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99906058A Expired - Lifetime EP1049868B1 (en) | 1998-01-23 | 1999-01-18 | Pump system for supplying fuel at high pressure |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6588405B1 (en) |
| EP (1) | EP1049868B1 (en) |
| JP (1) | JP4372999B2 (en) |
| DE (2) | DE19802476A1 (en) |
| WO (1) | WO1999037910A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19851286C2 (en) * | 1998-11-06 | 2001-05-17 | Siemens Ag | Device with intersection of holes |
| DE10029425B4 (en) * | 2000-06-15 | 2004-11-18 | Siemens Ag | Bore arrangement with an intersection formed from at least three bores and method for the production thereof |
| DE10029431A1 (en) * | 2000-06-15 | 2001-12-20 | Siemens Ag | Fuel pump boring system has second boring extended to a hemispherical endface beyond boring intersection and with cylindrical part also beyond intersection. |
| DE10042305A1 (en) * | 2000-08-29 | 2002-03-21 | Siemens Ag | Sealing device for a transition area on high pressure components |
| DE10046315C2 (en) * | 2000-09-19 | 2002-11-14 | Siemens Ag | High pressure pump for a storage injection system and storage injection system |
| GB2384529B (en) * | 2002-01-25 | 2005-06-01 | Delphi Tech Inc | Fuel pump assembly |
| DE10221305A1 (en) * | 2002-05-14 | 2003-11-27 | Bosch Gmbh Robert | Radial piston pump for fuel injection system with improved high pressure resistance |
| DE10229396A1 (en) * | 2002-06-29 | 2004-01-22 | Robert Bosch Gmbh | Radial piston pump for high-pressure fuel supply in injection systems of internal combustion engines with improved efficiency |
| DE10247142A1 (en) | 2002-10-09 | 2004-04-22 | Robert Bosch Gmbh | High pressure pump for fuel injection device has pump housing with body and cap to cover each pump element |
| JP4650629B2 (en) * | 2004-11-16 | 2011-03-16 | 株式会社アドヴィックス | Radial plunger pump |
| HUE025279T2 (en) * | 2005-10-25 | 2016-02-29 | Delphi Int Operations Luxembourg Sarl | A component for high-pressure fluid applications and method for its manufacture |
| DE102007052748A1 (en) * | 2007-11-06 | 2009-05-07 | Robert Bosch Gmbh | Radial piston pump with a prismatic body for a fuel injection system |
| DE102008001587A1 (en) * | 2008-05-06 | 2009-11-12 | Robert Bosch Gmbh | High pressure fuel pump for operating an internal combustion engine |
| DE102009027827A1 (en) * | 2009-07-20 | 2011-01-27 | Robert Bosch Gmbh | Pump housing of a motor vehicle hydraulic unit with at least one master cylinder port opening |
| UA109683C2 (en) | 2010-12-09 | 2015-09-25 | PUMP PUMP PLACED PIPE | |
| WO2013116535A1 (en) | 2012-02-01 | 2013-08-08 | S.P.M. Flow Control, Inc. | Pump fluid end with integrated web portion |
| DE102016106232B3 (en) * | 2016-04-06 | 2017-08-31 | L'orange Gmbh | Radial piston pump, especially for fuel, with several storage holes in the housing of the radial piston pump |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3119340A (en) * | 1961-09-22 | 1964-01-28 | Thompson Ramo Wooldridge Inc | Variable pump for fuel injection supply |
| IT1217254B (en) * | 1987-08-25 | 1990-03-22 | Weber Srl | IN-LINE PUMP FOR FUEL INJECTION SYSTEMS WITH COMMANDED INJECTORS FOR DIESEL CYCLE ENGINES |
| US5255658A (en) * | 1990-10-12 | 1993-10-26 | Coltec Industries Inc. | System and apparatus to improve atomization of injected fuel |
| DE9213982U1 (en) * | 1992-10-16 | 1993-08-12 | Wap Reinigungssysteme Gmbh & Co, 89287 Bellenberg, De | |
| JPH08135462A (en) * | 1994-11-09 | 1996-05-28 | Yamaha Motor Co Ltd | Vertical engine |
| JPH07167009A (en) * | 1993-12-14 | 1995-07-04 | Yamaha Motor Co Ltd | Fuel feed device for engine |
| US5463997A (en) * | 1994-10-05 | 1995-11-07 | Cutler Induction Systems, Inc. | Single point fuel injection system |
| DE19640480B4 (en) * | 1996-09-30 | 2004-04-22 | Robert Bosch Gmbh | High-pressure fuel storage |
| DE19727249A1 (en) * | 1996-07-01 | 1998-01-08 | Rexroth Mannesmann Gmbh | Device for stabilising eccentric ring of radial piston pump |
| US5956953A (en) * | 1997-02-08 | 1999-09-28 | Folsom; Lawrence R. | Concentric radial piston transmission with flexible cam ring |
| US5970956A (en) * | 1997-02-13 | 1999-10-26 | Sturman; Oded E. | Control module for controlling hydraulically actuated intake/exhaust valves and a fuel injector |
| FI101999B1 (en) * | 1997-02-20 | 1998-09-30 | Waertsilae Nsd Oy Ab | Arrangement for an injection pump at an internal combustion engine |
-
1998
- 1998-01-23 DE DE19802476A patent/DE19802476A1/en not_active Ceased
-
1999
- 1999-01-18 US US09/600,917 patent/US6588405B1/en not_active Expired - Fee Related
- 1999-01-18 JP JP2000528792A patent/JP4372999B2/en not_active Expired - Fee Related
- 1999-01-18 DE DE59901391T patent/DE59901391D1/en not_active Expired - Lifetime
- 1999-01-18 WO PCT/DE1999/000088 patent/WO1999037910A1/en active IP Right Grant
- 1999-01-18 EP EP99906058A patent/EP1049868B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59901391D1 (en) | 2002-06-13 |
| JP2002501144A (en) | 2002-01-15 |
| DE19802476A1 (en) | 1999-07-29 |
| US6588405B1 (en) | 2003-07-08 |
| WO1999037910A1 (en) | 1999-07-29 |
| EP1049868A1 (en) | 2000-11-08 |
| JP4372999B2 (en) | 2009-11-25 |
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