EP2312149B1 - Piston pump, in particular high pressure fuel pump - Google Patents

Piston pump, in particular high pressure fuel pump Download PDF

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Publication number
EP2312149B1
EP2312149B1 EP11153765.0A EP11153765A EP2312149B1 EP 2312149 B1 EP2312149 B1 EP 2312149B1 EP 11153765 A EP11153765 A EP 11153765A EP 2312149 B1 EP2312149 B1 EP 2312149B1
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EP
European Patent Office
Prior art keywords
piston pump
pressure fuel
pump
casing
fuel piston
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
Application number
EP11153765.0A
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German (de)
French (fr)
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EP2312149A1 (en
Inventor
Heinz Siegel
Andreas Altmann
Thomas Jackisch
Siamend Flo
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP2312149A1 publication Critical patent/EP2312149A1/en
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Classifications

    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • 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
    • 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
    • F02M59/445—Selection of particular materials
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the invention relates to a high-pressure fuel piston pump with a housing and with at least one laterally attached to the housing component.
  • a piston pump of the type mentioned is known from the market. It is used, for example, in fuel systems with direct fuel injection. In such systems, the fuel is compressed by a high pressure pump to a very high pressure and delivered to a fuel rail.
  • the high pressure piston pump includes a cylinder in which a piston is reciprocably received. During this movement of the piston, fuel taken up in a working space is compressed. The fuel enters the working space via an inlet port, and from the high pressure piston pump to the fuel manifold via an outlet port.
  • the two nozzles are screwed into lateral holes on the cylinder, which has a round outer cross-section. The lateral surface of the screwed into lateral holes.
  • the lateral surface of the cylinder is turned flat in the area of the holes.
  • the housing in the known high-pressure piston pump is made of steel. This is necessary in order to use the high-pressure piston pump with such fuels, which are ethanolhaltig. Starting from such a high-pressure piston pump, it is the object of the present invention to reduce their production costs.
  • US 2,573,344 describes a fuel injector whose housing has a square cross-section.
  • DE 43 38 483 C1 discloses a high pressure pump with two opposing components, which are suction caps.
  • a component to be mounted on the housing can be easily arranged.
  • the straight side surfaces provide ideal interfaces for most types of components to be attached.
  • An additional processing of the side surfaces for the integration of a component can be omitted. This lowers the manufacturing costs of the housing.
  • tools which introduce radially extending holes in the housing or edit there existing holes to be positioned more accurately and faster on the straight side surfaces which increases the manufacturing quality of the piston pump according to the invention.
  • an electrical line of a pressure sensor can be performed together with an already existing electrical line of an electromagnetic actuator, and it can be performed together with the hydraulic flow of the hydraulic inlet.
  • the side surfaces are at least approximately the same size. This increases the flexibility of the housing since basically any component can be placed on each side surface.
  • the housing has the shape of a symmetrical polygonal cross-section, in particular of a hexagon, in cross-section.
  • the opposing side surfaces are arranged parallel to each other. This facilitates the positioning of the housing during processing.
  • the support of forces that must be applied during processing or during the attachment of components on a side surface on this is simplified in this embodiment of the piston pump.
  • a hexagon offers with six side surfaces a sufficient number of possible connection points for components, at the same time still low production costs.
  • the invention has an effect if the housing is made of stainless steel.
  • the processing of stainless steel is relatively expensive and time-consuming and consuming. Since complex machining steps can be dispensed with in the case of the piston pump according to the invention, the costs are significantly reduced, especially when using stainless steel.
  • the housing is made of a round profile, from which the straight side surfaces are worked out.
  • Round profiles are in the Different diameters and material qualities available, which facilitates the production of a piston pump, which is tailored to the specific requirements of the particular application.
  • the housing is made of a standard polygonal profile.
  • Such, usually drawn starting materials are inexpensive, so that in this embodiment of the piston pump according to the invention, the production costs are low.
  • At least one component arranged on a side surface is a pressure sensor.
  • the straight side surfaces of the piston pump according to the invention are particularly well suited for mounting a commercially available pressure sensor. Already this reduces the costs considerably.
  • an internal combustion engine carries the reference numeral 10. It comprises a fuel system 12 to which a fuel tank 14 belongs.
  • a prefeed pump 16 conveys to a high-pressure piston pump 18.
  • this has an inlet pipe 20.
  • the high pressure piston pump 18 is connected to a fuel rail 24 in which the fuel is stored under high pressure.
  • a plurality of fuel injectors 26 are connected, which inject the fuel directly into them associated combustion chambers 28.
  • the high pressure piston pump 18 is placed directly on in FIG. 1 not shown manner driven by a camshaft of the internal combustion engine 10.
  • an electromagnetic actuating device 30 which is mounted on an in FIG. 1 invisible inlet valve of the high-pressure piston pump 18 acts.
  • the entirety of electromagnetic actuator 30 and Inlet valve of the high-pressure pump-piston pump 18 is also referred to as a quantity control valve.
  • the high-pressure piston pump 18 comprises an elongated housing 34 which is made of stainless steel and in which a cylinder liner 36 and a reciprocating piston 38 are received in this.
  • the housing 34 is made of a commercial drawn hexagonal profile 39 having a total of six substantially straight side surfaces 40a to 40f. Alternatively, the straight side surfaces could also be made by turning.
  • the cylinder liner 36 and the piston 38 are arranged in a blind bore 42 which extends in the central axis of the hexagonal profile 39.
  • the blind bore 42 and the piston 38 define a working space 44th
  • a stepped bore 46 is introduced, which can communicate via an inlet valve, not shown, with the working space 44 and in which the inlet port 20 is inserted. It is welded to the housing 34 in FIG. 48.
  • a stepped bore 50 is provided, in which the outlet port 22 is inserted. He is welded to the housing 34 with a weld 52.
  • an outlet valve 54 is pressed.
  • the stepped bore 50 may also communicate with the working space 44.
  • a stepped bore 56 is again introduced, in which the electromagnetic actuator 30 and (not visible), the inlet valve are used.
  • FIG. 4 An alternative embodiment of a high pressure piston pump 18 is shown in FIG. 4 shown.
  • carry such elements and areas which equivalent functions to elements and areas of related to the Figures 2 and 3 explained embodiment, have the same reference numerals. They are not explained again in detail.
  • the inlet nozzle 20 is not on the side surface 40a, but on the side surface 40b, ie immediately adjacent to the outlet 22, respectively. Further, in the side surface 40 f, a threaded bore 58 is introduced, in which a pressure sensor 60 is screwed. The threaded hole 58 communicates with the stepped bore 46, in which the inlet port 20 is fixed. By the pressure sensor 60, therefore, the pressure in a low pressure region (without reference numeral) of the fuel system 12 can be detected.
  • the pressure sensor 60 is a commercial part, which can be easily attached to the housing 34 of the high-pressure piston pump 18 due to the presence of the straight side surface 40f and sealed, for example, via an O-ring 61. Due to the direct attachment of the pressure sensor 60 to the high-pressure piston pump 18, additional installations in the line area between the prefeed pump 16 and the high-pressure piston pump 18 are not required.
  • FIG. 4 is very clear that when using a hexagonal profile 39 for the housing 34 on the one hand, the electrical components 30 and 60 and on the other hand connected to the fluid lines components 20 and 22 can be grouped in a simple manner opposite. This simplifies the corresponding wiring again.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Hochdruck-Kraftstoffkolbenpumpe mit einem Gehäuse und mit mindestens einer seitlich an dem Gehäuse angebrachten Komponente.The invention relates to a high-pressure fuel piston pump with a housing and with at least one laterally attached to the housing component.

Eine Kolbenpumpe der eingangs genannten Art ist vom Markt her bekannt. Sie kommt beispielsweise bei Kraftstoffsystemen mit Kraftstoff-Direkteinspritzung zum Einsatz. Bei derartigen Systemen wird der Kraftstoff von einer Hochdruckpumpe auf einen sehr hohen Druck komprimiert und zu einer Kraftstoff-Sammelleitung ("Rail") gefördert. Die Hochdruck-Kolbenpumpe umfasst einen Zylinder, in dem ein Kolben hin- und herbeweglich aufgenommen ist. Bei dieser Bewegung des Kolbens wird in einem Arbeitsraum aufgenommener Kraftstoff komprimiert. Der Kraftstoff gelangt in den Arbeitsraum über einen Einlassstutzen, und von der Hochdruck-Kolbenpumpe zur Kraftstoff-Sammelleitung über einen Auslassstutzen. Die beiden Stutzen sind an dem Zylinder, welcher einen runden Außenquerschnitt aufweist, in seitliche Bohrungen eingeschraubt. Die Mantelfläche des in seitliche Bohrungen eingeschraubt. Die Mantelfläche des Zylinders ist im Bereich der Bohrungen plan abgedreht.A piston pump of the type mentioned is known from the market. It is used, for example, in fuel systems with direct fuel injection. In such systems, the fuel is compressed by a high pressure pump to a very high pressure and delivered to a fuel rail. The high pressure piston pump includes a cylinder in which a piston is reciprocably received. During this movement of the piston, fuel taken up in a working space is compressed. The fuel enters the working space via an inlet port, and from the high pressure piston pump to the fuel manifold via an outlet port. The two nozzles are screwed into lateral holes on the cylinder, which has a round outer cross-section. The lateral surface of the screwed into lateral holes. The lateral surface of the cylinder is turned flat in the area of the holes.

Das Gehäuse bei der bekannten Hochdruck-Kolbenpumpe ist aus Stahl hergestellt. Dies ist erforderlich, um die Hochdruck-Kolbenpumpe auch bei solchen Kraftstoffen einsetzen zu können, welche ethanolhaltig sind. Ausgehend von einer solchen Hochdruck-Kolbenpumpe ist es die Aufgabe der vorliegenden Erfindung, deren Herstellkosten zu senken.The housing in the known high-pressure piston pump is made of steel. This is necessary in order to use the high-pressure piston pump with such fuels, which are ethanolhaltig. Starting from such a high-pressure piston pump, it is the object of the present invention to reduce their production costs.

US 2,573,344 beschreibt einen Kraftstoff-Injektor, dessen Gehäuse quadratischen Querschnitt aufweist. US 2,573,344 describes a fuel injector whose housing has a square cross-section.

DE 43 38 483 C1 offenbart eine Hochdruck-pumpe mit zwei einander gegenüber liegenden Komponenten, welche Saugdeckel sind. DE 43 38 483 C1 discloses a high pressure pump with two opposing components, which are suction caps.

Die gestellte Aufgabe wird durch eine Hochdruck-Kraftstoffkolbenpumpe mit den Merkmalen des Anspruchs 1 gelöst.The stated object is achieved by a high-pressure fuel piston pump having the features of claim 1.

Vorteile der ErfindungAdvantages of the invention

Durch die mehreckige Querschnittsform mit geraden, ebenen Seitenflächen kann eine am Gehäuse anzubringende Komponente einfach angeordnet werden. Die geraden Seitenflächen bieten für die meisten Arten von anzubringenden Komponenten ideale Schnittstellen. Eine zusätzliche Bearbeitung der Seitenflächen für die Integration einer Komponente kann entfallen. Dies senkt die Herstellkosten des Gehäuses. Ferner können Werkzeuge, welche radial verlaufende Bohrungen in das Gehäuse einbringen oder dort vorhandene Bohrungen bearbeiten sollen, an den geraden Seitenflächen exakter und schneller positioniert werden, was die Fertigungsqualität der erfindungsgemäßen Kolbenpumpe erhöht.Due to the polygonal cross-sectional shape with straight, flat side surfaces, a component to be mounted on the housing can be easily arranged. The straight side surfaces provide ideal interfaces for most types of components to be attached. An additional processing of the side surfaces for the integration of a component can be omitted. This lowers the manufacturing costs of the housing. Furthermore, tools which introduce radially extending holes in the housing or edit there existing holes to be positioned more accurately and faster on the straight side surfaces, which increases the manufacturing quality of the piston pump according to the invention.

Dabei liegen solche Komponenten, welche einen Fluidanschluss aufweisen, und solche Komponenten, welche einen elektrischen Anschluss aufweisen, einander wenigstens in etwa gegenüber. Dies erleichtert die Montage sowie die sinnvolle Anordnung der Fluid- beziehungsweise der elektrischen Leitungen. Beispielsweise kann eine elektrische Leitung eines Drucksensors gemeinsam mit einer ohnehin vorhandenen elektrischen Leitung einer elektromagnetischen Betätigungseinrichtung geführt werden, und es kann der hydraulische Zulauf zusammen mit dem hydraulischen Ablauf geführt werden.In this case, such components, which have a fluid connection, and those components which have an electrical connection, at least approximately opposite each other. This facilitates the assembly and the sensible arrangement of the fluid or electrical lines. For example, an electrical line of a pressure sensor can be performed together with an already existing electrical line of an electromagnetic actuator, and it can be performed together with the hydraulic flow of the hydraulic inlet.

Vorteilhafte Weiterbildungen sind in Unteransprüchen angegeben.Advantageous developments are specified in subclaims.

Zunächst wird vorgeschlagen, dass die Seitenflächen wenigstens in etwa gleich groß sind. Dies erhöht die Flexibilität des Gehäuses, da im Grunde jede Komponente an jeder Seitenfläche angeordnet werden kann.First, it is proposed that the side surfaces are at least approximately the same size. This increases the flexibility of the housing since basically any component can be placed on each side surface.

In Weiterbildung hierzu wird vorgeschlagen, dass das Gehäuse im Querschnitt die Form eines symmetrischen Mehrecks, insbesondere eines Sechsecks, aufweist. Bei einem symmetrischen Mehreck sind die einander gegenüberliegenden Seitenflächen parallel zueinander angeordnet. Dies erleichtert die Positionierung des Gehäuses während der Bearbeitung. Insbesondere die Abstützung von Kräften, die während der Bearbeitung beziehungsweise während des Anbringens von Komponenten an einer Seitenfläche auf diese aufgebracht werden müssen, wird bei dieser Ausgestaltung der Kolbenpumpe vereinfacht. Ein Sechseck bietet mit sechs Seitenflächen eine ausreichende Anzahl von möglichen Anbindungsstellen für Komponenten, bei gleichzeitig noch niedrigen Herstellkosten.In a further development, it is proposed that the housing has the shape of a symmetrical polygonal cross-section, in particular of a hexagon, in cross-section. In a symmetrical polygon, the opposing side surfaces are arranged parallel to each other. This facilitates the positioning of the housing during processing. In particular, the support of forces that must be applied during processing or during the attachment of components on a side surface on this, is simplified in this embodiment of the piston pump. A hexagon offers with six side surfaces a sufficient number of possible connection points for components, at the same time still low production costs.

Besonders vorteilhaft wirkt sich die Erfindung dann aus, wenn das Gehäuse aus Edelstahl hergestellt ist. Die Bearbeitung von Edelstahl ist vergleichsweise teuer und aufwendig sowie zeitintensiv. Da bei der erfindungsgemäßen Kolbenpumpe aufwendige Bearbeitungsschritte entfallen können, werden besonders beim Einsatz von Edelstahl die Kosten deutlich gesenkt.Particularly advantageous, the invention has an effect if the housing is made of stainless steel. The processing of stainless steel is relatively expensive and time-consuming and consuming. Since complex machining steps can be dispensed with in the case of the piston pump according to the invention, the costs are significantly reduced, especially when using stainless steel.

Möglich ist, dass das Gehäuse aus einem Rundprofil hergestellt ist, aus dem die geraden Seitenflächen herausgearbeitet sind. Rundprofile stehen in den unterschiedlichsten Durchmessern und Materialqualitäten zur Verfügung, was die Herstellung einer Kolbenpumpe erleichtert, welche genau auf die spezifischen Anforderungen des jeweiligen Einsatzfalles zugeschnitten ist.It is possible that the housing is made of a round profile, from which the straight side surfaces are worked out. Round profiles are in the Different diameters and material qualities available, which facilitates the production of a piston pump, which is tailored to the specific requirements of the particular application.

Alternativ hierzu ist es aber auch möglich, dass das Gehäuse aus einem Standard-Mehrkantprofil hergestellt ist. Derartige, üblicherweise gezogene Ausgangsmaterialien sind preisgünstig, so dass bei dieser Ausgestaltung der erfindungsgemäßen Kolbenpumpe die Herstellkosten niedrig sind.Alternatively, it is also possible that the housing is made of a standard polygonal profile. Such, usually drawn starting materials are inexpensive, so that in this embodiment of the piston pump according to the invention, the production costs are low.

Außerdem ist in einer weiteren Ausgestaltung der erfindungsgemäßen Kolbenpumpe vorgesehen, dass mindestens eine an einer Seitenfläche angeordnete Komponente ein Drucksensor ist. Die geraden Seitenflächen der erfindungsgemäßen Kolbenpumpe eignen sich besonders gut zur Anbringung eines handelsüblichen Drucksensors. Bereits dies reduziert die Kosten erheblich. Darüber hinaus kann auf eine separate Verrohrung mit einem entsprechenden Anschluss, an den der Drucksensor angebunden ist, verzichtet werden. Auch dies senkt die Kosten und vereinfacht den Aufbau des gesamten Kraftstoffsystems.In addition, in a further embodiment of the piston pump according to the invention, it is provided that at least one component arranged on a side surface is a pressure sensor. The straight side surfaces of the piston pump according to the invention are particularly well suited for mounting a commercially available pressure sensor. Already this reduces the costs considerably. In addition, can be dispensed with a separate piping with a corresponding port to which the pressure sensor is connected. This also reduces costs and simplifies the design of the entire fuel system.

Zeichnungdrawing Nachfolgend werden besonders bevorzugteThe following are particularly preferred

Ausführungsbeispiele der vorliegenden Erfindung unter Bezugsnahme auf die beiliegende Zeichnung näher erläutert. In der Zeichnung zeigen:

Figur 1
eine schematische Darstellung einer Brennkraftmaschine mit einer Hochdruck-Kolbenpumpe;
Figur 2
einen Teilschnitt durch die Hochdruck-Kolbenpumpe von Figur 1;
Figur 3
einen Schnitt längs der Linie III-III von Figur 2; und
Figur 4
eine Darstellung ähnlich Figur 2 einer alternativen Ausführungsform einer Hochdruck-Kolbenpumpe.
Embodiments of the present invention with reference to the accompanying drawings explained in more detail. In the drawing show:
FIG. 1
a schematic representation of an internal combustion engine with a high-pressure piston pump;
FIG. 2
a partial section through the high pressure piston pump of FIG. 1 ;
FIG. 3
a section along the line III-III of FIG. 2 ; and
FIG. 4
a representation similar FIG. 2 an alternative embodiment of a high-pressure piston pump.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Figur 1 trägt eine Brennkraftmaschine insgesamt das Bezugszeichen 10. Sie umfasst ein Kraftstoffsystem 12, zu dem ein Kraftstoffbehälter 14 gehört. Aus diesem fördert eine Vorförderpumpe 16 zu eine Hochdruck-Kolbenpumpe 18. Hierzu weist diese einen Einlassstutzen 20 auf. Über einen Auslassstutzen 22 ist die Hochdruck-Kolbenpumpe 18 mit einer Kraftstoff-Sammelleitung 24 verbunden, in der der Kraftstoff unter hohem Druck gespeichert ist. An sie sind mehrere Kraftstoff-Einspritzvorrichtungen 26 angeschlossen, die den Kraftstoff direkt in ihnen zugeordnete Brennräume 28 einspritzen.In FIG. 1 an internal combustion engine carries the reference numeral 10. It comprises a fuel system 12 to which a fuel tank 14 belongs. For this purpose, a prefeed pump 16 conveys to a high-pressure piston pump 18. For this purpose, this has an inlet pipe 20. Via an outlet 22, the high pressure piston pump 18 is connected to a fuel rail 24 in which the fuel is stored under high pressure. To them, a plurality of fuel injectors 26 are connected, which inject the fuel directly into them associated combustion chambers 28.

Die Hochdruck-Kolbenpumpe 18 wird direkt auf in Figur 1 nicht näher dargestellte Art und Weise von einer Nockenwelle der Brennkraftmaschine 10 angetrieben. Zur Einstellung der von der Hochdruck-Kolbenpumpe 18 in die Kraftstoff-Sammelleitung 24 geförderten Fluidmenge ist bei der Hochdruck-Kolbenpumpe 18 eine elektromagnetische Betätigungseinrichtung 30 vorhanden, welche auf ein in Figur 1 nicht sichtbares Einlassventil der Hochdruck-Kolbenpumpe 18 wirkt. Die Gesamtheit aus elektromagnetischer Betätigungseinrichtung 30 und Einlassventil der Hochdruckpumpe-Kolbenpumpe 18 wird auch als Mengensteuerventil bezeichnet.The high pressure piston pump 18 is placed directly on in FIG. 1 not shown manner driven by a camshaft of the internal combustion engine 10. For adjusting the amount of fluid delivered by the high-pressure piston pump 18 into the fuel collecting line 24, in the high-pressure piston pump 18 there is an electromagnetic actuating device 30, which is mounted on an in FIG. 1 invisible inlet valve of the high-pressure piston pump 18 acts. The entirety of electromagnetic actuator 30 and Inlet valve of the high-pressure pump-piston pump 18 is also referred to as a quantity control valve.

Der genaue Aufbau der Hochdruck-Kolbenpumpe 18 geht aus den Figuren 2 und 3 hervor. Die Hochdruck-Kolbenpumpe 18 umfasst ein längliches Gehäuse 34, das aus Edelstahl hergestellt ist und in dem eine Zylinderbuchse 36 und ein in dieser hin- und herbeweglicher Kolben 38 aufgenommen sind. Wie insbesondere aus Figur 2 ersichtlich ist, ist das Gehäuse 34 aus einem handelsüblichen gezogenen Sechskantprofil 39 hergestellt, welches insgesamt sechs im Wesentlichen gerade Seitenflächen 40a bis 40f aufweist. Alternativ könnten die geraden Seitenflächen auch durch Drehen hergestellt werden. Die Zylinderbuchse 36 und der Kolben 38 sind in einer Sackbohrung 42 angeordnet, die in der Mittelachse des Sechskantprofils 39 verläuft. Die Sackbohrung 42 und der Kolben 38 begrenzen einen Arbeitsraum 44.The exact structure of the high-pressure piston pump 18 goes out of the Figures 2 and 3 out. The high-pressure piston pump 18 comprises an elongated housing 34 which is made of stainless steel and in which a cylinder liner 36 and a reciprocating piston 38 are received in this. As in particular from FIG. 2 As can be seen, the housing 34 is made of a commercial drawn hexagonal profile 39 having a total of six substantially straight side surfaces 40a to 40f. Alternatively, the straight side surfaces could also be made by turning. The cylinder liner 36 and the piston 38 are arranged in a blind bore 42 which extends in the central axis of the hexagonal profile 39. The blind bore 42 and the piston 38 define a working space 44th

In die Seitenfläche 40a ist eine Stufenbohrung 46 eingebracht, welche über ein nicht dargestelltes Einlassventil mit dem Arbeitsraum 44 kommunizieren kann und in die der Einlassstutzen 20 eingesetzt ist. Er ist mit dem Gehäuse 34 in 48 verschweißt. In der in Figur 2 entgegen dem Urzeigersinn übernächsten Seitenfläche 40c des Sechskantprofils 39 ist ebenfalls eine Stufenbohrung 50 vorhanden, in die der Auslassstutzen 22 eingesetzt ist. Er ist mit einer Schweißnaht 52 mit dem Gehäuse 34 verschweißt. In die Stufenbohrung 50 ist auch ein Auslassventil 54 eingepresst. Die Stufenbohrung 50 kann ebenfalls mit dem Arbeitsraum 44 kommunizieren. In die nochmals im Uhrzeigersinn übernächste Seitenfläche 40e ist nochmals eine Stufenbohrung 56 eingebracht, in welche die elektromagnetische Betätigungseinrichtung 30 und (nicht sichtbar) das Einlassventil eingesetzt sind.In the side surface 40a, a stepped bore 46 is introduced, which can communicate via an inlet valve, not shown, with the working space 44 and in which the inlet port 20 is inserted. It is welded to the housing 34 in FIG. 48. In the in FIG. 2 Counterclockwise next side surface 40c of the hexagonal profile 39 is also a stepped bore 50 is provided, in which the outlet port 22 is inserted. He is welded to the housing 34 with a weld 52. In the stepped bore 50 and an outlet valve 54 is pressed. The stepped bore 50 may also communicate with the working space 44. In the again clockwise next to the side surface 40e a stepped bore 56 is again introduced, in which the electromagnetic actuator 30 and (not visible), the inlet valve are used.

Aus den Figuren 2 und 3 ist ohne weiteres ersichtlich, dass durch die Form des Gehäuses 34 als Sechskantprofil 39 mit den geraden Seitenflächen 40a bis 40f die Anbindung von Komponenten, wie beispielsweise der beiden Stutzen 20 und 22 sowie der elektromagnetischen Betätigungsvorrichtung 30, erheblich vereinfacht wird. Auch die Einbringung der entsprechenden Stufenbohrungen 46, 50, und 56 ist in die geraden Seitenflächen 40a, 40c, und 40e einfach und mit hoher Präzision möglich.From the Figures 2 and 3 is readily apparent that by the shape of the housing 34 as a hexagonal profile 39 with the straight side surfaces 40a to 40f, the connection of components, such as the two nozzles 20 and 22 and the electromagnetic actuator 30, is considerably simplified. The introduction of the corresponding stepped holes 46, 50, and 56 is in the straight side surfaces 40a, 40c, and 40e easy and with high precision possible.

Durch den symmetrischen Aufbau des Sechskantprofils 39 sind ferner die der Seitenfläche 40a gegenüberliegende Seitenfläche 40d, die der Seitenfläche 40c gegenüberliegende Seitenfläche 40f, und die der Seitenfläche 40e gegenüberliegende Seitenfläche 40b frei, so dass die bei der Einbringung der Stufenbohrungen 46, 50,und 56 sowie beim Einbau der Komponenten 20, 22, und 30 erforderlichen Abstützkräfte gut aufgenommen werden können. An den geraden Seitenflächen 40a bis 40f können darüber hinaus einfach noch weitere Bohrungen vorhanden sein, welche der Befestigung weiterer Anbaukomponenten dienen. Hierzu gehören beispielsweise auch Schlauchhalterungen oder sonstige Zusatzkomponenten.Due to the symmetrical structure of the hexagonal profile 39 are also the side surface 40a opposite side surface 40d, the side surface 40c opposite side surface 40f, and the side surface 40e opposite side surface 40b free, so that in the introduction of the stepped holes 46, 50, and 56 and when installing the components 20, 22, and 30 required support forces can be well received. On the straight side surfaces 40a to 40f, moreover, further bores may simply be present, which serve to fasten further attachment components. These include, for example, hose holders or other additional components.

Möglich ist aber auch die Anordnung der Komponenten 20, 22, und 30 an anderen Seitenflächen 40a bis 40f als in den Figuren 2 und 3 dargestellt, ohne dass komplexe Bearbeitungen der Außenfläche des Gehäuses 34 erforderlich sind. Hingewiesen sei auch auf die Möglichkeit, anstelle eines Sechskantprofils auch nur ein Dreikantprofil, ein Vierkantprofil, oder ein Achtkantprofil einzusetzen. Ein Dreikantprofil baut klein und leicht, wohingegen ein Achtkantprofil eine große Anzahl gerader Seitenflächen zur Anbindung unterschiedlichster Komponenten aufweist.But it is also possible the arrangement of the components 20, 22, and 30 on other side surfaces 40a to 40f than in the Figures 2 and 3 shown without complex operations of the outer surface of the housing 34 are required. It should also be noted that it is also possible to use only a triangular profile, a square profile or an octagonal profile instead of a hexagonal profile. A triangular profile is small and lightweight, whereas an octagonal profile has a large number of straight side surfaces for connecting a wide variety of components.

Eine alternative Ausführungsform einer Hochdruck-Kolbenpumpe 18 ist in Figur 4 gezeigt. Dabei tragen solche Elemente und Bereiche, welche äquivalente Funktionen zu Elementen und Bereichen des im Zusammenhang mit den Figuren 2 und 3 erläuterten Ausführungsbeispieles aufweisen, die gleichen Bezugszeichen. Sie sind nicht nochmals im Detail erläutert.An alternative embodiment of a high pressure piston pump 18 is shown in FIG FIG. 4 shown. In this case, carry such elements and areas, which equivalent functions to elements and areas of related to the Figures 2 and 3 explained embodiment, have the same reference numerals. They are not explained again in detail.

Bei der in Figur 4 gezeigten Hochdruck-Kolbenpumpe 18 ist der Einlassstutzen 20 nicht an der Seitenfläche 40a, sondern an der Seitenfläche 40b, also unmittelbar benachbart zum Auslassstutzen 22, angeordnet. Ferner ist in die Seitenfläche 40f eine Gewindebohrung 58 eingebracht, in die ein Drucksensor 60 eingeschraubt ist. Die Gewindebohrung 58 kommuniziert mit der Stufenbohrung 46, in der der Einlassstutzen 20 befestigt ist. Durch den Drucksensor 60 kann also der Druck in einem Niederdruckbereich (ohne Bezugszeichen) des Kraftstoffsystems 12 erfasst werden.At the in FIG. 4 shown high-pressure piston pump 18, the inlet nozzle 20 is not on the side surface 40a, but on the side surface 40b, ie immediately adjacent to the outlet 22, respectively. Further, in the side surface 40 f, a threaded bore 58 is introduced, in which a pressure sensor 60 is screwed. The threaded hole 58 communicates with the stepped bore 46, in which the inlet port 20 is fixed. By the pressure sensor 60, therefore, the pressure in a low pressure region (without reference numeral) of the fuel system 12 can be detected.

Bei dem Drucksensor 60 handelt es sich um ein handelsübliches Teil, welches aufgrund des Vorhandenseins der geraden Seitenfläche 40f problemlos am Gehäuse 34 der Hochdruck-Kolbenpumpe 18 befestigt und beispielsweise über einen O-Ring 61 abgedichtet werden kann. Durch die direkte Befestigung des Drucksensors 60 an der Hochdruck-Kolbenpumpe 18 sind zusätzliche Installationen im Leitungsbereich zwischen der Vorförderpumpe 16 und der Hochdruck-Kolbenpumpe 18 nicht erforderlich.The pressure sensor 60 is a commercial part, which can be easily attached to the housing 34 of the high-pressure piston pump 18 due to the presence of the straight side surface 40f and sealed, for example, via an O-ring 61. Due to the direct attachment of the pressure sensor 60 to the high-pressure piston pump 18, additional installations in the line area between the prefeed pump 16 and the high-pressure piston pump 18 are not required.

Darüber hinaus kann eine elektrische Leitung, welche an eine Steckbuchse 62 des Drucksensors 60 angeschlossen ist, gemeinsam mit einer ohnehin vorhandenen elektrischen Leitung geführt werden, welche an eine Steckbuchse 64 der elektromagnetischen Betätigungseinrichtung 30 angeschlossen ist. Aus Figur 4 geht sehr gut hervor, dass bei der Verwendung eines Sechskantprofils 39 für das Gehäuse 34 einerseits die elektrischen Komponenten 30 und 60 und andererseits die mit Fluidleitungen verbundenen Komponenten 20 und 22 auf einfache Weise gegenüberliegend gruppiert werden können. Dies vereinfacht nochmals die entsprechende Leitungsführung.In addition, an electrical line, which is connected to a socket 62 of the pressure sensor 60, are performed together with an already existing electrical line, which is connected to a socket 64 of the electromagnetic actuator 30 is connected. Out FIG. 4 is very clear that when using a hexagonal profile 39 for the housing 34 on the one hand, the electrical components 30 and 60 and on the other hand connected to the fluid lines components 20 and 22 can be grouped in a simple manner opposite. This simplifies the corresponding wiring again.

Claims (7)

  1. High-pressure fuel piston pump, with a pump casing (34) and with at least one component (20, 22, 30; 60) attached laterally to the pump casing, the pump casing (34) having a polygonal cross-sectional form (39) with at least partially straight side faces (40), and at least one component (20, 22, 30; 60) arranged in the region of a straight side face (40), characterized in that those components (20, 22) which have a fluid connection and those components (30; 60) which have an electrical connection (62, 64) lie at least approximately opposite one another.
  2. High-pressure fuel piston pump (18) according to Claim 1, characterized in that the side faces (40) are of at least approximately equal size.
  3. High-pressure fuel piston pump (18) according to Claim 2, characterized in that the casing (34) has in cross section the form of a symmetrical polygon, in particular of a hexagon (39).
  4. High-pressure fuel piston pump (18) according to one of the preceding claims, characterized in that the casing (34) is produced from high-grade steel.
  5. High-pressure fuel piston pump (18) according to one of the preceding claims, characterized in that the casing is produced from a round profile, from which the straight side faces are worked out.
  6. High-pressure fuel piston pump (18) according to one of Claims 1 to 4, characterized in that the casing (34) is produced from a standard polygonal profile (39).
  7. High-pressure fuel piston pump (18) according to one of the preceding claims, characterized in that at least one component arranged on a side face (40) is a pressure sensor (60).
EP11153765.0A 2003-05-20 2004-03-24 Piston pump, in particular high pressure fuel pump Expired - Lifetime EP2312149B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003122602 DE10322602A1 (en) 2003-05-20 2003-05-20 Piston pump, especially high pressure fuel pump
EP20040007021 EP1479903B1 (en) 2003-05-20 2004-03-24 Piston pump, in particular high pressure fuel pump

Related Parent Applications (1)

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EP04007021.1 Division 2004-03-24

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EP2312149A1 EP2312149A1 (en) 2011-04-20
EP2312149B1 true EP2312149B1 (en) 2013-05-22

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EP11153765.0A Expired - Lifetime EP2312149B1 (en) 2003-05-20 2004-03-24 Piston pump, in particular high pressure fuel pump
EP11153643.9A Expired - Fee Related EP2312148B1 (en) 2003-05-20 2004-03-24 Piston pump, in particular high pressure fuel pump
EP20040007021 Expired - Lifetime EP1479903B1 (en) 2003-05-20 2004-03-24 Piston pump, in particular high pressure fuel pump

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EP20040007021 Expired - Lifetime EP1479903B1 (en) 2003-05-20 2004-03-24 Piston pump, in particular high pressure fuel pump

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JP6595602B2 (en) * 2015-08-28 2019-10-23 日立オートモティブシステムズ株式会社 High pressure fuel pump and manufacturing method thereof
JP6708238B2 (en) 2017-09-29 2020-06-10 株式会社デンソー High pressure pump
JP6747482B2 (en) 2017-09-29 2020-08-26 株式会社デンソー High pressure pump
JP6809520B2 (en) 2017-09-29 2021-01-06 株式会社デンソー High pressure pump

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US2573344A (en) 1946-09-13 1951-10-30 Everett P Larsh Fuel injector
US3220351A (en) * 1963-05-28 1965-11-30 Technicon Chromatography Corp Positive displacement pump
US5863187A (en) * 1997-02-10 1999-01-26 Ivek Corporation Two position rotary reciprocating pump with liquid displacement flow adjustment
US6123059A (en) * 1997-09-05 2000-09-26 Denso Corporation Fuel supply apparatus
US6503066B1 (en) * 2000-06-20 2003-01-07 Curtiss-Wright Flow Control Corporation Hydrostatic pressure test pump
DE10046315C2 (en) * 2000-09-19 2002-11-14 Siemens Ag High pressure pump for a storage injection system and storage injection system
US6419459B1 (en) * 2000-10-02 2002-07-16 Gardner Denver, Inc. Pump fluid cylinder mounting assembly

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EP2312149A1 (en) 2011-04-20
EP1479903B1 (en) 2011-05-25
EP2312148A1 (en) 2011-04-20
DE10322602A1 (en) 2004-12-09
EP1479903A1 (en) 2004-11-24
EP2312148B1 (en) 2013-10-16

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