WO2009059834A1 - High-pressure fuel pump - Google Patents
High-pressure fuel pump Download PDFInfo
- Publication number
- WO2009059834A1 WO2009059834A1 PCT/EP2008/062514 EP2008062514W WO2009059834A1 WO 2009059834 A1 WO2009059834 A1 WO 2009059834A1 EP 2008062514 W EP2008062514 W EP 2008062514W WO 2009059834 A1 WO2009059834 A1 WO 2009059834A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pump
- pressure
- piston
- fuel
- camshaft
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
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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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/462—Delivery valves
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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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0448—Sealing means, e.g. for shafts or housings
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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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0452—Distribution members, e.g. valves
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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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
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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
- F02M59/10—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 the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
Definitions
- the invention relates to a high-pressure fuel pump for operating an internal combustion engine and consisting of a pump housing and at least two pump cylinder heads, in each of which a pump piston is guided in a piston guide, wherein above these pump piston in each case a pressure chamber is arranged, which is connected in each case with a low pressure inlet and a high pressure port , and the pump pistons are in contact with a common pump camshaft, creating a translational
- Movement of the pump piston generated and thus in the respective pressure chamber fuel sucked, can be compressed to high pressure and the respective high-pressure port is conveyed.
- a high-pressure fuel pump which consists of a split pump housing, in which a pump camshaft is mounted.
- This pump camshaft has an eccentric with a polygonal design which is in contact with one or more pump pistons.
- a pressure chamber is arranged in each case, above which in turn a
- Suction valve is placed and which is connected to a high pressure port of a high pressure accumulator.
- the respective suction valve is in this case connected to a low-pressure circuit of the internal combustion engine.
- a disadvantage of such an arrangement is the complicated placement of suction valves on the pressure chambers of the respective pump piston. It is therefore an object of the present invention to provide a high-pressure fuel pump in which the filling of the pressure chambers of the pump piston is possible in a simpler manner and thus the production cost of the high-pressure fuel pump can be reduced.
- this object is achieved in that the pump cylinder heads of the high-pressure fuel pump are arranged rotationally symmetrical about the pump camshaft and the pressure chambers are supplied via an inlet bore in the piston guide through the fuel inlet with fuel.
- Pressure chambers can be saved, which reduces the required space and reduces the production cost.
- the respective inlet bore lies on the side of the guide of the respective side facing the lateral force generated by rotation of the pump camshaft
- the respective pressure chamber is sealed by a sealing plate with respect to the pump housing.
- Diaphragm valve arranged in the manner of a high-pressure valve.
- a spring for closing the valve can be saved with the engine stopped, which reduces the manufacturing cost.
- the diaphragm valve is integrated with the gasket sheet.
- FIG. 1 is a schematic view of the high-pressure fuel pump
- Figure 2 is a detailed sectional view in the region of a pressure chamber of a pump piston, cut along the center line of a pump piston, and
- Figure 3 is a detailed sectional view in the region of a high pressure valve.
- FIG. 1 shows a schematic view of the high-pressure fuel pump according to the invention, which has three pump pistons 3a, 3b and 3c.
- These pump pistons 3a-3c are respectively guided in piston guides 4a, 4b and 4c and are arranged at an equidistant angle to each other on the same circumferential line (12) about a pump camshaft, not shown, on their polygonal training they are operated together.
- a pressure chamber 5a, 5b and 5c is arranged in each case.
- 5a-5c are in turn each connected to a low-pressure inlet 6a, 6b and 6c in the form of an inlet bore 8a, 8b and 8c in the piston guide 4a-4c and a high-pressure port 7a, 7b and 7c.
- FIG. 2 shows a detailed sectional view of a pressure chamber 5a, a pump piston 3a.
- This pressure chamber 5 a is supplied with fuel via the inlet bore 8 a and the low-pressure run 6 a, which leads through the pump housing 1 and the pump cylinder head 2 a.
- a sealing plate 9 is also arranged in the region of the pressure chamber 5a.
- the pressure chamber 5a is connected via lines arranged in the pump cylinder head 2a to a high-pressure port 7a, in which case a connection is established via a high-pressure ball valve.
- the pump pistons 3a-3c are moved via the pump camshaft, not shown.
- fuel from the respective low-pressure inlet 6a-6c and the inlet bore 8a-8c sucked when the inlet bore 8a-8c is not closed by the respective pump piston 3a-3c.
- the sucked fuel is compressed to high pressure and conveyed via the respective high-pressure port 7a-7c to the common high-pressure accumulator, not shown.
Abstract
The present invention relates to a high-pressure fuel pump for operating an internal combustion engine, comprising a pump housing (1) and at least two pump cylinder heads (2a-2c), in each of which a pump piston (3a-3c) is guided in a piston guide (4a-4c), wherein one pressure chamber (5a-5c) each is disposed above said pump pistons (3a-3c), each of which is connected to one low-pressure inlet (6a-6c) and one high-pressure connection (7a-7c), and the pump pistons (3a-3c) are in contact with a mutual pump camshaft, whereby a translational movement of the pump pistons (3a-3c) can be created, and fuel can therefore be suctioned in the respective pressure chamber (5a-5c), can be compressed to high pressure and conveyed to the respective high-pressure connection (7a-7c), wherein the at least two pump cylinder heads (2a-2c) are further disposed at an equidistant angle to each other on the same circumferential line (12) about the pump camshaft, and fuel can be supplied to the pressure chambers (5a-5c) via one inlet bore (8a-8c) in the piston guide (4a-4c) by means of the low-pressure inlet (6a-6c).
Description
Hochdruckkraftstoffpumpe High pressure fuel pump
Die Erfindung betrifft eine Hochdruckkraftstoffpumpe zum Betrieb einer Brennkraftmaschine und bestehend aus einem Pumpengehäuse und mindestens zwei Pumpenzylinderköpfen, in welchen jeweils ein Pumpenkolben in einer Kolbenführung geführt ist, wobei oberhalb dieser Pumpenkolben jeweils ein Druckraum angeordnet ist, welcher jeweils mit einem Niederdruckzulauf und einem Hochdruckanschluss verbunden ist, und die Pumpenkolben mit einer gemeinsamen Pumpennockenwelle in Kontakt stehen, wodurch eine translatorischeThe invention relates to a high-pressure fuel pump for operating an internal combustion engine and consisting of a pump housing and at least two pump cylinder heads, in each of which a pump piston is guided in a piston guide, wherein above these pump piston in each case a pressure chamber is arranged, which is connected in each case with a low pressure inlet and a high pressure port , and the pump pistons are in contact with a common pump camshaft, creating a translational
Bewegung der Pumpenkolben erzeugbar und damit in dem jeweiligen Druckraum Kraftstoff ansaugbar, auf Hochdruck verdichtbar und zum jeweiligen Hochdruckanschluss förderbar ist.Movement of the pump piston generated and thus in the respective pressure chamber fuel sucked, can be compressed to high pressure and the respective high-pressure port is conveyed.
Stand der TechnikState of the art
Aus der WO 2005/052356 A2 ist bereits eine Hochdruckkraftstoffpumpe bekannt, welche aus einem geteilten Pumpengehäuse besteht, in welchem eine Pumpennockenwelle gelagert ist. Diese Pumpennockenwelle verfügt über einen Excenter mit einer polygonen Ausbildung, welche mit einem oder mehreren Pumpenkolben in Kontakt steht. Oberhalb des einen oder der mehreren Pumpenkolben ist jeweils ein Druckraum angeordnet, über welchem wiederum einFrom WO 2005/052356 A2, a high-pressure fuel pump is already known, which consists of a split pump housing, in which a pump camshaft is mounted. This pump camshaft has an eccentric with a polygonal design which is in contact with one or more pump pistons. Above the one or more pump pistons a pressure chamber is arranged in each case, above which in turn a
Saugventil platziert ist und der mit einem Hochdruckanschluss eines Hochdruckspeichers verbunden ist. Das jeweilige Saugventil ist hierbei mit einem Niederdruckkreislauf der Brennkraftmaschine verbunden.Suction valve is placed and which is connected to a high pressure port of a high pressure accumulator. The respective suction valve is in this case connected to a low-pressure circuit of the internal combustion engine.
Bei Betrieb der Hochdruckkraftstoffpumpe wird durch Rotation der Pumpennockenwelle und mit Hilfe der polygonen Ausbildung des Excenters eine translatorische Bewegung des oder der Pumpenkolben erzeugt, was dazu führt, dass in den jeweiligen Druckräumen bei einer Abwärtsbewegung des Kolbens über das Saugventil unter Niederdruck stehender Kraftstoff angesaugt, bei der darauffolgenden Aufwärtsbewegung des Kolbens dieser Kraftstoff verdichtet und schließlich zum Hochdruckanschluss des Hochdruckspeichers gefördert wird.During operation of the high-pressure fuel pump, a translational movement of the pump piston or pumps is generated by rotation of the pump camshaft and with the aid of the polygonal design of the eccentric, which leads to the fact that sucked in the respective pressure chambers at a downward movement of the piston via the suction valve at low pressure fuel at the subsequent upward movement of the piston, this fuel is compressed and finally conveyed to the high pressure port of the high pressure accumulator.
Nachteilhaft an einer derartigen Anordnung ist die aufwendige Platzierung von Saugventilen über den Druckräumen der jeweiligen Pumpenkolben.
Es ist daher die Aufgabe der vorliegenden Erfindung, eine Hochdruckkraftstoffpumpe zu schaffen, bei welcher die Befüllung der Druckräume der Pumpenkolben auf einfachere Weise möglich ist und somit der Herstellungsaufwand der Hochdruckkraftstoffpumpe reduziert werden kann.A disadvantage of such an arrangement is the complicated placement of suction valves on the pressure chambers of the respective pump piston. It is therefore an object of the present invention to provide a high-pressure fuel pump in which the filling of the pressure chambers of the pump piston is possible in a simpler manner and thus the production cost of the high-pressure fuel pump can be reduced.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Pumpenzylinderköpfe der Hochdruckkraftstoffpumpe rotationssymmetrisch um die Pumpennockenwelle angeordnet sind und die Druckräume über jeweils eine Zulaufbohrung in der Kolbenführung durch den Kraftstoffzulauf mit Kraftstoff versorgt werden. Dadurch ist ein kompakter Aufbau der Hochdruckkraftstoffpumpe möglich und gleichzeitig können die Saugventile oberhalb derAccording to the invention this object is achieved in that the pump cylinder heads of the high-pressure fuel pump are arranged rotationally symmetrical about the pump camshaft and the pressure chambers are supplied via an inlet bore in the piston guide through the fuel inlet with fuel. This makes a compact design of the high pressure fuel pump possible and at the same time the suction valves above the
Druckräume eingespart werden, was den benötigten Bauraum verringert und den Herstellungsaufwand reduziert.Pressure chambers can be saved, which reduces the required space and reduces the production cost.
In Weiterbildung der Erfindung liegt die jeweilige Zulaufbohrung auf der einer durch Rotation der Pumpennockenwelle erzeugten Querkraft zugewandten Seite der Führung des jeweiligenIn a further development of the invention, the respective inlet bore lies on the side of the guide of the respective side facing the lateral force generated by rotation of the pump camshaft
Pumpenkolbens. Durch diese Maßnahme wird die Zulaufbohrung gut verschlossen und die Hochdruckleckage reduziert, da der Pumpenkolben durch die Rotation der Pumpennockenwelle und die daraus resultierende Querkraft verkippt und in diesem Bereich an die Kolbenführung angepresst wird.Pump piston. By this measure, the inlet bore is well closed and reduces the high pressure leakage, since the pump piston is tilted by the rotation of the pump camshaft and the resulting lateral force and pressed in this area to the piston guide.
In einer weiteren Ausgestaltung der Erfindung ist der jeweilige Druckraum über ein Dichtungsblech gegenüber dem Pumpengehäuse abgedichtet. Der Vorteil ist hierbei, dass eine bessere Abdichtung gegenüber dem Pumpeninnenraum erreicht wird.In a further embodiment of the invention, the respective pressure chamber is sealed by a sealing plate with respect to the pump housing. The advantage here is that a better seal against the pump interior is achieved.
In Weiterbildung der Erfindung ist als Verbindung zu dem jeweiligen Hochdruckanschluss einIn a further development of the invention is as a connection to the respective high pressure port
Membranventil nach Art eines Hochdruckventils angeordnet. Bei dieser Ausführung kann eine Feder zum Verschließen des Ventils bei stehendem Motor eingespart werden, was den Herstellungsaufwand reduziert.Diaphragm valve arranged in the manner of a high-pressure valve. In this embodiment, a spring for closing the valve can be saved with the engine stopped, which reduces the manufacturing cost.
In einer weiteren Ausgestaltung der Erfindung ist das Membranventil mit in das Dichtungsblech integriert. Dadurch kann eine kompaktere Gestaltung im Bereich des Druckraums erfolgen und Bauraum eingespart werden.In a further embodiment of the invention, the diaphragm valve is integrated with the gasket sheet. As a result, a more compact design in the area of the pressure chamber can take place and space can be saved.
Weitere, die Erfindung verbessernden Maßnahmen werden nachstehend gemeinsam mit der
Beschreibung eines bevorzugten Ausführangsbeispiels der Erfindung anhand von Figuren näher dargestellt.Further measures improving the invention will be described below together with the Description of a preferred Ausführangsbeispiels invention the invention illustrated by figures in more detail.
AusfuhrungsbeispieleExemplary embodiments
Es zeigen:Show it:
Figur 1 eine schematische Ansicht der Kraftstoffhochdruckpumpe,FIG. 1 is a schematic view of the high-pressure fuel pump;
Figur 2 eine detaillierte Schnittansicht im Bereich eines Druckraums eines Pumpenkolbens, geschnitten entlang der Mittellinie eines Pumpenkolbens, undFigure 2 is a detailed sectional view in the region of a pressure chamber of a pump piston, cut along the center line of a pump piston, and
Figur 3 eine detaillierte Schnittansicht im Bereich eines Hochdruckventils.Figure 3 is a detailed sectional view in the region of a high pressure valve.
Figur 1 zeigt eine schematische Ansicht der erfindungsgemäßen Hochdruckkraftstoffpumpe, welche über drei Pumpenkolben 3a, 3b und 3c verfügt. Diese Pumpenkolben 3a-3c sind jeweils in Kolbenführungen 4a, 4b und 4c geführt und sind in einem äquidistanten Winkel zueinander auf derselben Umfangslinie (12) um eine nicht dargestellte Pumpennockenwelle angeordnet, über deren polygone Ausbildung sie gemeinsam betrieben werden. Oberhalb jedes Pumpenkolbens 3a-3c ist jeweils ein Druckraum 5a, 5b und 5c angeordnet. Diese DruckräumeFigure 1 shows a schematic view of the high-pressure fuel pump according to the invention, which has three pump pistons 3a, 3b and 3c. These pump pistons 3a-3c are respectively guided in piston guides 4a, 4b and 4c and are arranged at an equidistant angle to each other on the same circumferential line (12) about a pump camshaft, not shown, on their polygonal training they are operated together. Above each pump piston 3a-3c, a pressure chamber 5a, 5b and 5c is arranged in each case. These pressure chambers
5a-5c sind wiederum jeweils mit einem Niederdruckzulauf 6a, 6b und 6c in Form einer Zulaufbohrung 8a, 8b und 8c in der Kolbenführung 4a-4c und einem Hochdruckanschluss 7a, 7b und 7c verbunden.5a-5c are in turn each connected to a low-pressure inlet 6a, 6b and 6c in the form of an inlet bore 8a, 8b and 8c in the piston guide 4a-4c and a high-pressure port 7a, 7b and 7c.
In Figur 2 ist eine detaillierte Schnittansicht eines Druckraumes 5a, eines Pumpenkolbens 3a zu sehen. Dieser Druckraum 5a wird über die Zulaufbohrung 8a und den Niederdrucklauf 6a, welcher durch das Pumpengehäuse 1 und den Pumpenzylinderkopf 2a führt, mit Kraftstoff versorgt. Um eine optimale Abdichtung des Druckraums 5a gegenüber dem Pumpeninnenraum 10 zu erreichen, ist zudem im Bereich des Druckraums 5a ein Dichtungsblech 9 angeordnet. Des Weiteren ist der Druckraum 5a über in dem Pumpenzylinderkopf 2a angeordneten Leitungen mit einem Hochdruckanschluss 7a verbunden, wobei eine Verbindung in diesem Fall über ein Hochdruckkugelventil hergestellt wird.FIG. 2 shows a detailed sectional view of a pressure chamber 5a, a pump piston 3a. This pressure chamber 5 a is supplied with fuel via the inlet bore 8 a and the low-pressure run 6 a, which leads through the pump housing 1 and the pump cylinder head 2 a. In order to achieve an optimum sealing of the pressure chamber 5a relative to the pump interior 10, a sealing plate 9 is also arranged in the region of the pressure chamber 5a. Furthermore, the pressure chamber 5a is connected via lines arranged in the pump cylinder head 2a to a high-pressure port 7a, in which case a connection is established via a high-pressure ball valve.
Im Unterschied dazu ist in Figur 3 das Hochdruckventil als ein Membranventil 11 , welches
- A -In contrast, in Figure 3, the high-pressure valve as a diaphragm valve 11, which - A -
zwischen Pumpengehäuse 1 und Pumpenzylinderkopf 2a als ein Element des Dichtungsbleches 9 realisiert. Durch dieses wird bei einer Hochdruckerzeugung durch den jeweiligen Pumpenkolben 3 a eine Verbindung zu dem Hochdruckanschluss 7a des nicht dargestellten Hochdruckspeichers hergestellt.realized between the pump housing 1 and pump cylinder head 2a as an element of the sealing plate 9. As a result of this, a connection to the high-pressure connection 7a of the high-pressure accumulator, not shown, is produced by the respective pump piston 3a in the case of a high-pressure generation.
Bei Betrieb der Hochdruckkraftstoffpumpe werden die Pumpenkolben 3a-3c über die nicht dargestellte Pumpennockenwelle bewegt. Hierbei wird Kraftstoff aus dem jeweiligen Niederdruckzulauf 6a-6c und die Zulaufbohrung 8a-8c angesaugt, wenn die Zulaufbohrung 8a- 8c nicht durch den jeweiligen Pumpenkolben 3a-3c verschlossen ist. Bei der Verdichtungsbewegung des jeweiligen Kolbens 3a-3c und Verschließen der Zulaufbohrung 8a-During operation of the high-pressure fuel pump, the pump pistons 3a-3c are moved via the pump camshaft, not shown. Here, fuel from the respective low-pressure inlet 6a-6c and the inlet bore 8a-8c sucked when the inlet bore 8a-8c is not closed by the respective pump piston 3a-3c. During the compression movement of the respective piston 3a-3c and closing of the inlet bore 8a
8c über diesen wird der angesaugte Kraftstoff auf Hochdruck verdichtet und über den jeweiligen Hochdruckanschluss 7a-7c zu dem gemeinsamen, nicht dargestellten Hochdruckspeicher gefördert.
8c via this, the sucked fuel is compressed to high pressure and conveyed via the respective high-pressure port 7a-7c to the common high-pressure accumulator, not shown.
Claims
1. Hochdruckkraftstoffpumpe zum Betrieb einer Brennkraftmaschine und bestehend aus einem Pumpengehäuse (1) und mindestens zwei Pumpenzylinderköpfen (2a - 2c), in welchen jeweils ein Pumpenkolben (3a - 3c) in einer Kolbenführung (4a - 4c) geführt ist, wobei oberhalb dieser Pumpenkolben (3a - 3c) jeweils ein Druckraum (5a - 5c)angeordnet ist, welcher jeweils mit einem Niederdruckzulauf (6a - 6c) und einem Hochdruckanschluss (7a - 7c) verbunden ist, und die Pumpenkolben (3a - 3c) mit einer gemeinsamen Pumpennockenwelle in Kontakt stehen, wodurch eine translatorische Bewegung der Pumpenkolben (3a - 3c) erzeugbar und damit in dem jeweiligen Druckraum (5a - 5c) Kraftstoff ansaugbar, auf Hochdruck verdichtbar und zum jeweiligen Hochdruckanschluss (7a - 7c) förderbar ist, dadurch gekennzeichnet, dass die mindestens zwei Pumpenzylinderköpfe (2a - 2c) in einem äquidistanten Winkel zueinander auf derselben Umfangslinie (12) um die Pumpennockenwelle angeordnet sind und die Druckräume (5a - 5c) über jeweils eine Zulaufbohrung (8a - 8c) in der Kolbenführung (4a - 4c) durch den Nieder druckzulauf (6a - 6c) mit Kraftstoff versorgbar sind.1. High-pressure fuel pump for operating an internal combustion engine and consisting of a pump housing (1) and at least two pump cylinder heads (2a - 2c), in each of which a pump piston (3a - 3c) in a piston guide (4a - 4c) is guided, wherein above this pump piston (3a - 3c) in each case a pressure chamber (5a - 5c) is arranged, which in each case with a low pressure inlet (6a - 6c) and a high pressure port (7a - 7c) is connected, and the pump piston (3a - 3c) with a common pump camshaft in Contact, whereby a translational movement of the pump piston (3a - 3c) generated and thus in the respective pressure chamber (5a - 5c) fuel sucked, compressible to high pressure and the respective high-pressure port (7a - 7c) is conveyed, characterized in that the at least two pump cylinder heads (2a-2c) are arranged at an equidistant angle to each other on the same circumferential line (12) about the pump camshaft and the pressure chambers (5a-5a) 5c) via a respective inlet bore (8a - 8c) in the piston guide (4a - 4c) by the low pressure inlet (6a - 6c) are supplied with fuel.
2. Hochdruckkraftstoffbumpe nach Anspruch 1, dadurch gekennzeichnet, dass die jeweilige Zulaufbohrung (8a - 8c) auf der einer durch Rotation der Pumpennockenwelle erzeugten Querkraft zugewandten Seite der Führung (4a - 4c) des jeweiligen Pumpenkolbens (3a - 3c) liegt.2. High-pressure fuel pump according to claim 1, characterized in that the respective inlet bore (8a - 8c) on the lateral force generated by rotation of the pump camshaft side facing the guide (4a - 4c) of the respective pump piston (3a - 3c).
3. Hochdruckkraftstoffpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der jeweilige Druckraum (5a - 5c) über ein Dichtungsblech (9) gegenüber dem Pumpeninnenraum (10) abgedichtet ist.3. High-pressure fuel pump according to claim 1 or 2, characterized in that the respective pressure chamber (5a - 5c) via a sealing plate (9) relative to the pump interior (10) is sealed.
4. Hochdruckkraftstoffpumpe nach einem der Ansprüche 1-3, dadurch gekennzeichnet, dass als Verbindung zu dem jeweiligen Hochdruckanschluss (7a - 7c) ein Membranventil (11) nach Art eines Hochdruckventils angeordnet ist.4. High-pressure fuel pump according to one of claims 1-3, characterized in that as a connection to the respective high-pressure port (7a - 7c) a diaphragm valve (11) is arranged in the manner of a high-pressure valve.
5. Hochdruckkraftstoffpumpe nach Anspruch 3 und 4, dadurch gekennzeichnet, dass das Membranventil (11) mit in das Dichtungsblech (9) integriert ist. 5. High-pressure fuel pump according to claim 3 and 4, characterized in that the diaphragm valve (11) with in the sealing plate (9) is integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008801148102A CN101849099B (en) | 2007-11-05 | 2008-09-19 | High-pressure fuel pump |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007052668.9 | 2007-11-05 | ||
| DE200710052668 DE102007052668A1 (en) | 2007-11-05 | 2007-11-05 | High pressure fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009059834A1 true WO2009059834A1 (en) | 2009-05-14 |
Family
ID=40085590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/062514 WO2009059834A1 (en) | 2007-11-05 | 2008-09-19 | High-pressure fuel pump |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101849099B (en) |
| DE (1) | DE102007052668A1 (en) |
| WO (1) | WO2009059834A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150017035A1 (en) * | 2012-01-30 | 2015-01-15 | Delphi International Operations Luxembourg S.A.R.L. | Pump head for a fuel pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626407A1 (en) * | 1996-07-01 | 1998-01-08 | Rexroth Mannesmann Gmbh | High-pressure pump for fuel-injector |
| EP0972936A2 (en) * | 1998-07-14 | 2000-01-19 | LUCAS INDUSTRIES public limited company | Positive displacement pumps |
| DE10151057A1 (en) * | 2001-10-16 | 2003-04-30 | Bosch Gmbh Robert | High pressure radial piston fuel pump, for an IC motor, has a common valve plate for the valves at the low and high pressure channels, fitting into an opening in the pump housing and secured by a clamping screw |
| DE10310124A1 (en) * | 2003-03-07 | 2004-09-16 | Siemens Ag | gasket |
| WO2005052356A2 (en) | 2003-11-25 | 2005-06-09 | Robert Bosch Gmbh | Fuel-injection device for an internal combustion engine |
| DE102006000831A1 (en) * | 2006-01-05 | 2007-07-12 | Siemens Ag | Radial piston pump for fuel high pressure supply of internal combustion engine, has continuously variable transmission, which stays in effective connection with drive shaft, where revolution speed of shaft is adjustable using transmission |
-
2007
- 2007-11-05 DE DE200710052668 patent/DE102007052668A1/en not_active Withdrawn
-
2008
- 2008-09-19 CN CN2008801148102A patent/CN101849099B/en not_active Expired - Fee Related
- 2008-09-19 WO PCT/EP2008/062514 patent/WO2009059834A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626407A1 (en) * | 1996-07-01 | 1998-01-08 | Rexroth Mannesmann Gmbh | High-pressure pump for fuel-injector |
| EP0972936A2 (en) * | 1998-07-14 | 2000-01-19 | LUCAS INDUSTRIES public limited company | Positive displacement pumps |
| DE10151057A1 (en) * | 2001-10-16 | 2003-04-30 | Bosch Gmbh Robert | High pressure radial piston fuel pump, for an IC motor, has a common valve plate for the valves at the low and high pressure channels, fitting into an opening in the pump housing and secured by a clamping screw |
| DE10310124A1 (en) * | 2003-03-07 | 2004-09-16 | Siemens Ag | gasket |
| WO2005052356A2 (en) | 2003-11-25 | 2005-06-09 | Robert Bosch Gmbh | Fuel-injection device for an internal combustion engine |
| DE102006000831A1 (en) * | 2006-01-05 | 2007-07-12 | Siemens Ag | Radial piston pump for fuel high pressure supply of internal combustion engine, has continuously variable transmission, which stays in effective connection with drive shaft, where revolution speed of shaft is adjustable using transmission |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150017035A1 (en) * | 2012-01-30 | 2015-01-15 | Delphi International Operations Luxembourg S.A.R.L. | Pump head for a fuel pump |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007052668A1 (en) | 2009-05-07 |
| CN101849099A (en) | 2010-09-29 |
| CN101849099B (en) | 2012-08-22 |
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