EP2235353B1 - Hochdruckkraftstoffpumpe - Google Patents

Hochdruckkraftstoffpumpe Download PDF

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Publication number
EP2235353B1
EP2235353B1 EP08864925A EP08864925A EP2235353B1 EP 2235353 B1 EP2235353 B1 EP 2235353B1 EP 08864925 A EP08864925 A EP 08864925A EP 08864925 A EP08864925 A EP 08864925A EP 2235353 B1 EP2235353 B1 EP 2235353B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
low
fuel
pistons
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.)
Not-in-force
Application number
EP08864925A
Other languages
English (en)
French (fr)
Other versions
EP2235353A1 (de
Inventor
Johann Warga
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2235353A1 publication Critical patent/EP2235353A1/de
Application granted granted Critical
Publication of EP2235353B1 publication Critical patent/EP2235353B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • the invention relates to a high-pressure fuel pump according to the preamble of claim 1.
  • Such a high pressure fuel pump is out of the DE 10 2006 017 301 A1 known.
  • This high-pressure fuel pump consists of a pump housing and two mounted on this pump cylinder heads, in each of which a pump piston for compression of low-pressure fuel from a low pressure inlet in each case a pressure chamber to high pressure and to promote the fuel is guided to a high pressure port of a high-pressure accumulator.
  • the two pump pistons can be operated via a common polygonal design of a pump camshaft.
  • the two pump cylinder heads are mounted on the pump housing so that the two pump pistons are at an angle of 120 ° to each other.
  • the high-pressure fuel pump according to the invention with the features according to claim 1 has the advantage that the metering unit for supplying the low-pressure inlets is arranged in a favorable position and in a simple manner on the high-pressure fuel pump.
  • the pump housing of the high-pressure fuel pump can thus be taken over by a high-pressure fuel pump which has three pump pistons, wherein the low-pressure block with the metering unit is arranged at the location of the dispensed third pump piston.
  • the drive speed of the high pressure fuel pump with respect to the speed of the internal combustion engine is 2/3.
  • a low-pressure connection is arranged in the low pressure block at 90 ° to the metering unit. It is advantageous here that the fuel supply to the metering unit is arranged very compactly on the high-pressure fuel pump.
  • the single FIGURE shows a sectional view of the high-pressure fuel pump according to the invention, cut in the plane of arrangement of the pump piston.
  • This high-pressure fuel pump consists of a pump housing 1, on which the two pump cylinder heads 2a and 2b are arranged at a 120 ° angle to each other.
  • the pump piston 3a and 3b are guided, which are in the middle of the pump housing 1 with a common polygonal training 4 a pump camshaft 5 in contact.
  • the suction valves 7a and 7b of the respective pump pistons 3a and 3b are also supplied with low-pressure fuel via low-pressure inlets 6a and 6b.
  • the suction valves 7a and 7b in turn fill the above the pump piston 3a and 3b arranged pressure chambers 8a and 8b with fuel.
  • the low-pressure inlets 6a and 6b are connected to a recess 9 of a low-pressure block 10.
  • a metering unit 11 is arranged, which is supplied by means of a low-pressure port 12 from a non-illustrated feed pump with fuel under low pressure and dosed, depending on the operating point of the internal combustion engine, to the recess 9 and thus the low pressure inlets 6a and 6b forwards ,
  • a high-pressure port 13a and 13b are arranged, which are in communication with a high-pressure accumulator, not shown.
  • a translational movement of the pump pistons 3a and 3b is generated by the rotational movement of the pump camshaft and the polygonal formation 4, resulting in fuel being introduced into the pressure chambers 8a and 8b via the low-pressure inlets 6a and 6b and the suction valves 7a and 7b is sucked, there compressed to high pressure and transported to the high-pressure ports 13a and 13b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)

Description

  • Die Erfindung betrifft eine Hochdruckkraftstoffpumpe gemäß dem Oberbegriff des Anspruchs 1.
  • Eine solche Hochdruckkraftstoffpumpe ist aus der DE 10 2006 017 301 A1 bekannt. Diese Hochdruckkraftstoffpumpe besteht aus einem Pumpengehäuse und zwei auf diesem aufgesetzten Pumpenzylinderköpfen, in welchen jeweils ein Pumpenkolben zur Verdichtung von unter Niederdruck stehendem Kraftstoff aus jeweils einem Niederdruckzulauf in jeweils einen Druckraum auf Hochdruck und zur Förderung des Kraftstoffs zu jeweils einem Hochdruckanschluss eines Hochdruckspeichers geführt ist. Die beiden Pumpenkolben sind über eine gemeinsame polygone Ausbildung einer Pumpennockenwelle betreibbar. Die zwei Pumpenzylinderköpfe sind derart auf dem Pumpengehäuse befestigt, dass die beiden Pumpenkolben in einem Winkel von 120° zueinander liegen. Allgemein ist es bekannt bei Hochdruckkraftstoffpumpen eine Zumesseinheit zur Versorgung der Niederdruckzuläufe zu den Pumpenkolben vorzusehen, jedoch ist eine solche Zumesseinheit bei der Hochdruckkrafftstoffpumpe gemäß der
    DE 10 2006 017 301 A1 nicht vorhanden.
    • Vorteile der Erfindung
  • Die erfindungsgemäße Hochdruckkraftstoffpumpe mit den Merkmalen gemäß Anspruch 1 hat den Vorteil, dass die Zumesseinheit zur Versorgung der Niederdruckzuläufe in günstiger Lage und auf einfache Weise an der Hochdruckkraftstoffpumpe angeordnet ist.
  • Das Pumpengehäuse der Hochdruckkraftstoffpumpe kann somit von einer Hochdruckkraftstoffpumpe übernommen werden, die drei Pumpenkolben aufweist, wobei an der Stelle des entfallenden dritten Pumpenkolbens der Niederdruckblock mit der Zumesseinheit angeordnet ist.
  • Vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Hochdruckkraftstoffpumpe sind in den abhängigen Ansprüchen angegeben.
  • In einer weiteren Ausgestaltung der Erfindung beträgt die Antriebsdrehzahl der Hochdruckkraftstoffpumpe bezüglich der Drehzahl der Brennkraftmaschine 2/3. Durch diese Maßnahme wird eine teilsynchrone Förderung der Pumpe bezüglich des Hochdruckspeichers der Brennkraftmaschine erreicht und somit deren Betrieb gewährleistet.
  • In einer weiteren Ausgestaltung der Erfindung ist in dem Niederdruckblock ein Niederdruckanschluss im 90°Winkel zu der Zumesseinheit angeordnet. Vorteilhaft ist hierbei, dass auch die Kraftstoffzuführung zu der Zumesseinheit sehr kompakt an der Hochdruckkraftstoffpumpe angeordnet ist.
  • Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand einer Figur näher dargestellt.
    • Ausführungsbeispiel
  • Die einzige Figur zeigt eine Schnittdarstellung der erfindungsgemäßen Hochdruckkraftstoffpumpe, geschnitten in der Anordnungsebene der Pumpenkolben. Diese Hochdruckkraftstoffpumpe besteht aus einem Pumpengehäuse 1, auf welchem in einem 120° Winkel zueinander die beiden Pumpenzylinderköpfe 2a und 2b angeordnet sind. In diesen beiden Pumpenzylinderköpfen 2a und 2b sind jeweils die Pumpenkolben 3a und 3b geführt, welche in der Mitte des Pumpengehäuses 1 mit einer gemeinsam polygonen Ausbildung 4 einer Pumpennockenwelle 5 in Kontakt stehen. In den Pumpenzylinderköpfen 2a und 2b werden zudem über Niederdruckzuläufe 6a und 6b die Saugventile 7a und 7b der jeweiligen Pumpenkolben 3a und 3b mit unter Niederdruck stehendem Kraftstoff versorgt. Die Saugventile 7a und 7b befüllen wiederum die oberhalb der Pumpenkolben 3a und 3b angeordneten Druckräume 8a und 8b mit Kraftstoff. Auf der anderen Seite sind die Niederdruckzuläufe 6a und 6b mit einer Ausnehmung 9 eines Niederdruckblocks 10 verbunden. Im Bereich der Ausnehmung 9 ist eine Zumesseinheit 11 angeordnet, welche mittels eines Niederdruckanschlusses 12 von einer nicht dargestellten Förderpumpe mit unter Niederdruck stehendem Kraftstoff versorgt wird und diesen dosiert, je nach Betriebspunkt der Brennkraftmaschine, an die Ausnehmung 9 und damit die Niederdruckzuläufe 6a und 6b weiterleitet. Außerdem ist im Bereich der Druckräume 8a und 8b der Pumpenkolben 3a und 3b jeweils ein Hochdruckanschluss 13a und 13b angeordnet, welche mit einem nicht dargestellten Hochdruckspeicher in Verbindung stehen.
  • Bei Betrieb der Brennkraftmaschine wird durch die rotatorische Bewegung der Pumpennockenwelle und der polygonen Ausbildung 4 eine translatorische Bewegung der Pumpenkolben 3a und 3b erzeugt, was dazu führt, dass über die Niederdruckzuläufe 6a und 6b und die Saugventile 7a und 7b Kraftstoff in die Druckräume 8a und 8b gesogen wird, dort auf Hochdruck verdichtet und zu den Hochdruckanschlüssen 13a und 13b befördert wird.

Claims (3)

  1. Hochdruckkraftstoffpumpe zum Betrieb einer Brennkraftmaschine und bestehend aus einem Pumpengehäuse (1) und zwei auf diesem aufgesetzten Pumpenzylinderköpfen (2a,2b), in welchen jeweils ein Pumpenkolben (3a,3b) zur Verdichtung von unter Niederdruck stehendem Kraftstoff aus jeweils einem Niederdruckzulauf (6a,6b) in jeweils einen Druckraum (8a,8b) auf Hochdruck und zur Förderung des Kraftstoffs zu jeweils einem Hochdruckanschluss (13a,13b) eines Hochdruckspeichers geführt ist, wobei die beiden Pumpenkolben (3a,3b) über eine gemeinsame polygone Ausbildung (4) einer Pumpennockenwelle (5) betreibbar sind und wobei die zwei Pumpenzylinderköpfe (2a,2b) derart auf dem Pumpengehäuse (1) befestigt sind, dass die beiden Pumpenkolben (3a,3b) in einem Winkel von 120° zueinander liegen, dadurch gekennzeichnet, dass eine Zumesseinheit (11) zur Versorgung der beiden Niederdruckzuläufe (6a,6b) in einem 120°-Winkel zu beiden Pumpenkolben (3a,3b) angeordnet ist und dass die Zumesseinheit (11) in einem Niederdruckblock (10) integriert ist, welcher auf das Pumpengehäuse (1) aufgesetzt ist und auf der Aufsatzfläche über eine Ausnehmung (9) verfügt, in welcher die beiden Niederdruckzuläufe (6a,6b) in einem Winkel größer als 90° zusammenlaufen.
  2. Hochdruckkraftstoffpumpe nach Anspruch 1,
    dadurch gekennzeichnet, dass deren Antriebsdrehzahl bezüglich der Drehzahl der Brennkraftmaschine 2/3 beträgt.
  3. Hochdruckkraftstoffpumpe nach Anspruch 1,
    dadurch gekennzeichnet, dass in dem Niederdruckblock (10) ein Niederdruckanschluss (12) im 90°-Winkel zu der Zumesseinheit (11) angeordnet ist.
EP08864925A 2007-12-21 2008-11-24 Hochdruckkraftstoffpumpe Not-in-force EP2235353B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007062181A DE102007062181A1 (de) 2007-12-21 2007-12-21 Hochdruckkraftstoffpumpe
PCT/EP2008/066048 WO2009080425A1 (de) 2007-12-21 2008-11-24 Hochdruckkraftstoffpumpe

Publications (2)

Publication Number Publication Date
EP2235353A1 EP2235353A1 (de) 2010-10-06
EP2235353B1 true EP2235353B1 (de) 2011-09-28

Family

ID=40261020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08864925A Not-in-force EP2235353B1 (de) 2007-12-21 2008-11-24 Hochdruckkraftstoffpumpe

Country Status (5)

Country Link
EP (1) EP2235353B1 (de)
CN (1) CN101903639A (de)
AT (1) ATE526500T1 (de)
DE (1) DE102007062181A1 (de)
WO (1) WO2009080425A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2530315A1 (de) * 2011-06-02 2012-12-05 Delphi Technologies Holding S.à.r.l. Kraftstoffpumpenschmierung
CN103089507B (zh) * 2013-01-09 2015-06-10 中国第一汽车股份有限公司无锡油泵油嘴研究所 双排六缸径向式共轨供油泵
DE102018108406A1 (de) 2017-06-22 2018-12-27 Denso Corporation Hochdruckkraftstoffpumpe und Kraftstoffversorgungssystem

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB460327A (en) * 1935-11-27 1937-01-26 Bristol Aeroplane Co Ltd Improvements in or relating to fuel-injection pumps for internal-combustion engines
US2902989A (en) * 1957-02-04 1959-09-08 Gen Motors Corp Charge forming means
DE19635164A1 (de) 1996-08-30 1998-03-05 Bosch Gmbh Robert Kolbenpumpe
DE102004017049A1 (de) * 2004-04-07 2005-10-27 Robert Bosch Gmbh Pumpenelemente in Reihenanordnung für Bremsanlagen
JP4650629B2 (ja) * 2004-11-16 2011-03-16 株式会社アドヴィックス ラジアルプランジャポンプ
DE102006017301B4 (de) 2006-04-12 2008-03-06 Siemens Ag Pumpe

Also Published As

Publication number Publication date
ATE526500T1 (de) 2011-10-15
CN101903639A (zh) 2010-12-01
EP2235353A1 (de) 2010-10-06
WO2009080425A1 (de) 2009-07-02
DE102007062181A1 (de) 2009-06-25

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