WO2008009489A1 - Crank-driven high-pressure pump, particularly for supplying high-pressure fuel in fuel injection systems - Google Patents

Crank-driven high-pressure pump, particularly for supplying high-pressure fuel in fuel injection systems Download PDF

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Publication number
WO2008009489A1
WO2008009489A1 PCT/EP2007/052534 EP2007052534W WO2008009489A1 WO 2008009489 A1 WO2008009489 A1 WO 2008009489A1 EP 2007052534 W EP2007052534 W EP 2007052534W WO 2008009489 A1 WO2008009489 A1 WO 2008009489A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
channel
housing
crosshead
fuel
Prior art date
Application number
PCT/EP2007/052534
Other languages
German (de)
French (fr)
Inventor
Wolfgang Bloching
Ümit Dilalan
Mario Köhler
Stephan Notzon
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008009489A1 publication Critical patent/WO2008009489A1/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
    • 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
    • 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
    • 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
    • F04B1/0413—Cams
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F04B53/146—Piston-rod guiding arrangements
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams

Definitions

  • High-pressure crank drive pump in particular for high-pressure fuel supply in fuel injection systems
  • the invention relates to a high-pressure Kur Hä ⁇ pump, in particular for high-pressure fuel supply in fuel injection systems, with a housing in which one or more piston-cylinder units are arranged with a crosshead or crossheads, each crosshead guided in a cylinder of the housing and is connected via a connecting rod with a drive shaft.
  • a cross-head of such a high-pressure pump must take Crankshaft to the high pressure piston axis on ⁇ which extends from the rotational angle of the connecting rod erge ⁇ ben large transverse forces perpendicular. Furthermore, there is the problem that during the pressure stroke of the crank drive pump, the crosshead must displace considerable amounts of force ⁇ material in a short time. So that no undesirably high pressure build-up takes place, it is required that the fuel is returned to the pressure side facing away from the crosshead to ⁇ .
  • the aforementioned problems have been solved in that the crosshead is flattened on the sides ⁇ surfaces.
  • the pressure compensation is achieved via holes in the support piston.
  • a channel is arranged, which connects the funnelkopfOber ⁇ page with the funnelkopfSchseite. This will advantageously realized a simple pressure equalization.
  • the channel is arranged axially parallel to the cylinder in ⁇ nenwand.
  • the channel is advantageously arranged on the unloaded side of the crosshead runway. He can advantageously extend on the side surface of the housing and - to save money - are poured directly into the housing.
  • the drawing shows a cross section through a high-pressure crank drive pump.
  • high-pressure crank drive pump is used in particular for high-pressure fuel supply in fuel injection systems.
  • a housing 3 in which a plurality of piston-cylinder units are arranged with crossheads 2.
  • only one piston-cylinder unit is Darge ⁇ provides.
  • Each crosshead 2 is ge ⁇ leads in a cylinder 10 of the housing 3 and connected via a connecting rod 12 with a drive shaft 14, wherein by rotating the drive shaft 14 of the crosshead 2 on the connecting rod 12 in the cylinder 10 is moved up and down and in each case via a compressor piston 8 causes a compression of the sucked fuel.
  • a channel 1 is arranged in the housing 3.
  • the ⁇ ser channel 1 connects the cross-head top O with the cross gropfGermanseite U.
  • the channel is in the exemplary embodiment before ⁇ some manner axially parallel to the cylinder inner wall angeord ⁇ net, this facilitates in particular the production and ensures In addition, for a space-saving arrangement of the channel in the hous ⁇ se.
  • this channel may be designed for example as rectangular or half round ⁇ channel.
  • the channel 1 extends preferential ⁇ axis parallel to the cylinder inner wall and can be cast directly into the housing 3, so that no mechanical Be ⁇ processing is required.
  • the channel 1 is advantageously always in the unloaded area of the crosshead track, so that the wing is not unnecessarily reduced and no excessive wear on ⁇ occurs.
  • the channel 1 or, for example, a plurality of channels on the side surface of the housing 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention relates to a crank-driven high-pressure pump, particularly for supplying high-pressure fuel in fuel injection systems, comprising a housing (3) inside which several piston cylinder units are disposed that are provided with crossheads (2). Each crosshead (2) is guided within a cylinder (10) of the housing (3) and is connected to a drive shaft (14) by means of a connecting rod (12). According to the invention, a duct (1) which connects the top face (O) to the bottom face (U) of the crosshead is arranged in the housing (3).

Description

Beschreibungdescription
Hochdruck-Kurbeltriebpumpe, insbesondere zur Kraftstoff- Hochdruckversorgung bei Kraftstoff-EinspritzsystemenHigh-pressure crank drive pump, in particular for high-pressure fuel supply in fuel injection systems
Die Erfindung bezieht sich auf eine Hochdruck-Kurbetrieb¬ pumpe, insbesondere zur Kraftstoff-Hochdruckversorgung bei Kraftstoff-Einspritzsystemen, mit einem Gehäuse, in welchem ein oder mehrere Kolbenzylindereinheiten mit einem Kreuzkopf oder Kreuzköpfen angeordnet sind, wobei jeder Kreuzkopf in einem Zylinder des Gehäuses geführt und über einen Pleuel mit einer Antriebswelle verbunden ist.The invention relates to a high-pressure Kurbetrieb ¬ pump, in particular for high-pressure fuel supply in fuel injection systems, with a housing in which one or more piston-cylinder units are arranged with a crosshead or crossheads, each crosshead guided in a cylinder of the housing and is connected via a connecting rod with a drive shaft.
Ein Kreuzkopf einer derartigen Hochdruck-Kurbeltriebpumpe muss große Querkräfte senkrecht zur Hochdruckkolbenachse auf¬ nehmen, welche sich aus dem Schwenkwinkel des Pleuels erge¬ ben. Weiterhin besteht das Problem, dass beim Druckhub der Kurbeltriebpumpe der Kreuzkopf erhebliche Mengen an Kraft¬ stoff in kurzer Zeit verdrängen muss. Damit kein unerwünscht hoher Druckaufbau stattfindet, ist es erforderlich, dass der Kraftstoff auf die druckabgewandte Seite des Kreuzkopfes zu¬ rückgeführt wird.A cross-head of such a high-pressure pump must take Crankshaft to the high pressure piston axis on ¬ which extends from the rotational angle of the connecting rod erge ¬ ben large transverse forces perpendicular. Furthermore, there is the problem that during the pressure stroke of the crank drive pump, the crosshead must displace considerable amounts of force ¬ material in a short time. So that no undesirably high pressure build-up takes place, it is required that the fuel is returned to the pressure side facing away from the crosshead to ¬.
Beim bisherigen Stand der Technik wurden die vorgenannten Probleme dadurch gelöst, dass der Kreuzkopf auf den Seiten¬ flächen abgeflacht ist. Bei anderen Pumpenbauarten, beispielsweise Gleitschuhpumpen, wird der Druckausgleich über Bohrungen im Stützkolben erzielt.In the prior art, the aforementioned problems have been solved in that the crosshead is flattened on the sides ¬ surfaces. In other pump types, such as sliding shoe pumps, the pressure compensation is achieved via holes in the support piston.
Beide zum Stand der Technik zählenden Lösungen sind bau- und/oder kostenaufwändig, wobei dementsprechend die Aufgabe besteht, eine Konstruktion zu schaffen, welche zu einer Kos¬ tenreduzierung beiträgt .Both counting the prior art solutions are hardware and / or expensive, and accordingly, the object is to provide a construction which contributes to a Kos ¬ tenreduzierung.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass imThis object is achieved in that in
Gehäuse ein Kanal angeordnet ist, welcher die KreuzkopfOber¬ seite mit der KreuzkopfUnterseite verbindet. Hierdurch wird vorteilhafterweise ein einfacher Druckausgleich realisiert. Vorzugsweise ist der Kanal dabei achsparallel zur Zylinderin¬ nenwand angeordnet .Housing a channel is arranged, which connects the KreuzkopfOber ¬ page with the KreuzkopfUnterseite. This will advantageously realized a simple pressure equalization. Preferably, the channel is arranged axially parallel to the cylinder in ¬ nenwand.
In weiterer Ausgestaltung der Erfindung ist der Kanal vorteilhafterweise auf der unbelasteten Seite der Kreuzkopflauf- bahn angeordnet. Er kann hierbei vorteilhafterweise auf der Seitenfläche des Gehäuses verlaufen und - zur Kostenersparnis - direkt in das Gehäuse eingegossen werden.In a further embodiment of the invention, the channel is advantageously arranged on the unloaded side of the crosshead runway. He can advantageously extend on the side surface of the housing and - to save money - are poured directly into the housing.
Die Erfindung wird nachfolgend anhand eines einzigen in der Zeichnung dargestellten Ausführungsbeispiels näher beschrie¬ ben .The invention will be described in more detail with reference to a single embodiment shown in the drawing ¬ ben.
Die Zeichnung zeigt einen Querschnitt durch eine Hochdruck- Kurbeltriebpumpe .The drawing shows a cross section through a high-pressure crank drive pump.
Die in der Zeichnung im Schnitt dargestellte Hochdruck- Kurbeltriebpumpe dient insbesondere zur Kraftstoff- Hochdruckversorgung bei Kraftstoff-Einspritzsystemen. Es liegt ein Gehäuse 3 vor, in welchem mehrere Kolbenzylindereinheiten mit Kreuzköpfen 2 angeordnet sind. Im vorliegenden Ausführungsbeispiel ist nur eine Kolbenzylindereinheit darge¬ stellt.The illustrated in the drawing in section high-pressure crank drive pump is used in particular for high-pressure fuel supply in fuel injection systems. There is a housing 3, in which a plurality of piston-cylinder units are arranged with crossheads 2. In the present embodiment, only one piston-cylinder unit is Darge ¬ provides.
Jeder Kreuzkopf 2 ist in einem Zylinder 10 des Gehäuses 3 ge¬ führt und über einen Pleuel 12 mit einer Antriebswelle 14 verbunden, wobei durch Drehen der Antriebswelle 14 der Kreuzkopf 2 über dem Pleuel 12 in dem Zylinder 10 auf und ab be- wegt wird und jeweils über einen Verdichterkolben 8 eine Verdichtung des angesaugten Kraftstoffs bewirkt.Each crosshead 2 is ge ¬ leads in a cylinder 10 of the housing 3 and connected via a connecting rod 12 with a drive shaft 14, wherein by rotating the drive shaft 14 of the crosshead 2 on the connecting rod 12 in the cylinder 10 is moved up and down and in each case via a compressor piston 8 causes a compression of the sucked fuel.
Erfindungsgemäß ist im Gehäuse 3 ein Kanal 1 angeordnet . Die¬ ser Kanal 1 verbindet die KreuzkopfOberseite O mit der Kreuz- köpfUnterseite U. Der Kanal ist im Ausführungsbeispiel vor¬ teilhafter Weise achsparallel zur Zylinderinnenwand angeord¬ net, dies erleichtert insbesondere die Fertigung und sorgt zudem für eine Platz sparende Anordnung des Kanals im Gehäu¬ se .According to the invention, a channel 1 is arranged in the housing 3. The ¬ ser channel 1 connects the cross-head top O with the cross köpfUnterseite U. The channel is in the exemplary embodiment before ¬ some manner axially parallel to the cylinder inner wall angeord ¬ net, this facilitates in particular the production and ensures In addition, for a space-saving arrangement of the channel in the hous ¬ se.
Es erfolgt also ein Druckausgleich durch den seitlichen Kanal 1, wobei dieser Kanal beispielsweise als Rechteck- oder Halb¬ rundkanal ausgeführt sein kann. Der Kanal 1 verläuft vorzugs¬ weise achsparallel zur Zylinderinnenwand und kann direkt in das Gehäuse 3 eingegossen sein, so dass keine mechanische Be¬ arbeitung mehr erforderlich ist.Thus, there is a pressure equalization through the lateral channel 1, this channel may be designed for example as rectangular or half round ¬ channel. The channel 1 extends preferential ¬ axis parallel to the cylinder inner wall and can be cast directly into the housing 3, so that no mechanical Be ¬ processing is required.
Der Kanal 1 liegt vorteilhafterweise immer im unbelasteten Bereich der Kreuzkopflaufbahn, damit die Tragfläche nicht unnötig reduziert wird und kein übermäßiger Verschleiß auf¬ tritt.The channel 1 is advantageously always in the unloaded area of the crosshead track, so that the wing is not unnecessarily reduced and no excessive wear on ¬ occurs.
Für eine Drehrichtungsunabhängigkeit der Antriebswelle 14 ist es vorteilhaft, den Kanal 1 oder beispielsweise auch mehrere Kanäle auf die Seitenfläche des Gehäuses 3 zu verlegen.For a direction of rotation independence of the drive shaft 14, it is advantageous to lay the channel 1 or, for example, a plurality of channels on the side surface of the housing 3.
Durch die technisch einfache Lösung ergibt sich ein Druckaus¬ gleich, wobei ein mechanischer Bearbeitungsschritt entfallen kann. Es treten auch funktionelle Vorteile auf, da man im Ge¬ häuse wesentlich mehr Strömungsfläche zur Verfügung hat als an den Kreuzkopfaußenflachen . The technically simple solution results in a Druckaus ¬ same, with a mechanical processing step can be omitted. There are also functional advantages, since one has in the case ¬ significantly more flow area available than at the crosshead outer surfaces.

Claims

Patentansprüche claims
1. Hochdruck-Kurbeltriebpumpe, insbesondere zur Kraftstoff- Hochdruckversorgung bei Kraftstoff-Einspritzsystemen, mit einem Gehäuse (3) , in welchem ein oder mehrere Kol¬ benzylindereinheiten mit Kreuzkopf (2) angeordnet sind,1. High-pressure crankshaft pump, in particular for high-pressure fuel supply in fuel injection systems, with a housing (3) in which one or more Kol ¬ benzylindereinheiten with crosshead (2) are arranged,
wobei jeder Kreuzkopf (2) in einem Zylinder (10) des Ge¬ häuses (3) geführt und über einen Pleuel (12) mit einer Antriebswelle (14) verbunden ist,wherein each crosshead (2) in a cylinder is guided (10) of Ge ¬ häuses (3) and connected via a connecting rod (12) having a drive shaft (14),
dadurch gekennzeichnet, dasscharacterized in that
im Gehäuse (3) mindestens ein Kanal (1) angeordnet ist, welcher die KreuzkopfOberseite (O) mit der Kreuzkopfun¬ terseite (U) verbindet .in the housing (3) at least one channel (1) is arranged, which connects the crosshead top (O) with the Kreuzkopfun ¬ terseite (U).
2. Hochdruck-Kurbeltriebpumpe nach Anspruch 1, dadurch ge¬ kennzeichnet, dass der Kanal (1) achsparallel zur Zylin- derinnenwand angeordnet ist.2. High-pressure crankshaft pump according to claim 1, characterized ge ¬ indicates that the channel (1) is arranged axially parallel to the cylinder inner wall.
3. Hochdruck-Kurbeltriebpumpe nach Anspruch 1 oder 2, da¬ durch gekennzeichnet, dass der Kanal (1) auf der unbe¬ lasteten Seite der Kreuzkopflaufbahn angeordnet ist.3. High-pressure crank gear pump according to claim 1 or 2, since ¬ characterized by that the channel (1) on the non-load side of the crosshead ¬ raceway is arranged.
4. Hochdruck-Kurbeltriebpumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Kanal (1) auf der Seitenfläche des Gehäuses (3) verläuft.4. High-pressure crankshaft pump according to one of the preceding claims, characterized in that the channel (1) extends on the side surface of the housing (3).
5. Hochdruck-Kurbeltriebpumpe nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kanal (1) im Querschnitt Rechteck-, Halbrundform o- der eine Kombination aus beidem besitzt.5. High-pressure crankshaft pump according to one or more of the preceding claims, characterized in that the channel (1) in cross-section rectangular, half-round shape o- has a combination of both.
6. Hochdruck-Kurbeltriebpumpe nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kanal (1) direkt in das Gehäuse (3) eingegossen oder mechanisch oder elektromechanisch eingebracht ist. 6. High-pressure crankshaft pump according to one or more of the preceding claims, characterized in that the channel (1) is cast directly into the housing (3) or is introduced mechanically or electromechanically.
PCT/EP2007/052534 2006-07-19 2007-03-16 Crank-driven high-pressure pump, particularly for supplying high-pressure fuel in fuel injection systems WO2008009489A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006033472.8 2006-07-19
DE200610033472 DE102006033472B4 (en) 2006-07-19 2006-07-19 High-pressure crank drive pump, in particular for high-pressure fuel supply in fuel injection systems

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Publication Number Publication Date
WO2008009489A1 true WO2008009489A1 (en) 2008-01-24

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PCT/EP2007/052534 WO2008009489A1 (en) 2006-07-19 2007-03-16 Crank-driven high-pressure pump, particularly for supplying high-pressure fuel in fuel injection systems

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WO (1) WO2008009489A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012049069A1 (en) * 2010-10-14 2012-04-19 Continental Automotive Gmbh High pressure pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203063B (en) * 1961-08-02 1965-10-14 Milton Roy Co Device for lubricating the ball joint connections of the connecting rod with the crank and the cross head of a piston pump with variable delivery capacity
US4313714A (en) * 1979-10-01 1982-02-02 Kubeczka Johnny D High pressure radial pump
DE3206152A1 (en) * 1982-02-11 1983-08-25 Maschinenfabrik Sulzer-Burckhardt AG, 4002 Basel CROSS HEAD OF A PISTON MACHINE
US6457309B1 (en) * 2001-05-18 2002-10-01 Joseph Carl Firey Multifuel internal combustion stirling engine
WO2006037671A1 (en) * 2004-10-06 2006-04-13 Siemens Aktiengesellschaft Radial piston pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528423A1 (en) * 1965-03-27 1969-08-14 Gewerk Eisenhuette Westfalia Meh? Er piston pump, especially for conveying pressure medium for hydraulic expansion in underground operations

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203063B (en) * 1961-08-02 1965-10-14 Milton Roy Co Device for lubricating the ball joint connections of the connecting rod with the crank and the cross head of a piston pump with variable delivery capacity
US4313714A (en) * 1979-10-01 1982-02-02 Kubeczka Johnny D High pressure radial pump
DE3206152A1 (en) * 1982-02-11 1983-08-25 Maschinenfabrik Sulzer-Burckhardt AG, 4002 Basel CROSS HEAD OF A PISTON MACHINE
US6457309B1 (en) * 2001-05-18 2002-10-01 Joseph Carl Firey Multifuel internal combustion stirling engine
WO2006037671A1 (en) * 2004-10-06 2006-04-13 Siemens Aktiengesellschaft Radial piston pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012049069A1 (en) * 2010-10-14 2012-04-19 Continental Automotive Gmbh High pressure pump

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DE102006033472A1 (en) 2008-01-24
DE102006033472B4 (en) 2009-01-02

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