EP2310679B1 - Pompe a carburant haute pression - Google Patents

Pompe a carburant haute pression Download PDF

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Publication number
EP2310679B1
EP2310679B1 EP09779639.5A EP09779639A EP2310679B1 EP 2310679 B1 EP2310679 B1 EP 2310679B1 EP 09779639 A EP09779639 A EP 09779639A EP 2310679 B1 EP2310679 B1 EP 2310679B1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
low
pressure fuel
camshaft
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
EP09779639.5A
Other languages
German (de)
English (en)
Other versions
EP2310679A1 (fr
Inventor
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 EP2310679A1 publication Critical patent/EP2310679A1/fr
Application granted granted Critical
Publication of EP2310679B1 publication Critical patent/EP2310679B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/103—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being a radial piston pump
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/12—Combinations of two or more pumps the pumps being of different types at least one pump being of the rotary-piston positive-displacement type

Definitions

  • the invention relates to a high-pressure fuel pump for operating an internal combustion engine according to the preamble of claim 1.
  • Such a high-pressure fuel pump is through US 2006/201484 A1 known.
  • This high-pressure fuel pump has a pump housing, in which a pump camshaft is mounted, which is connected via a polygonal design with at least two pump pistons, which are displaceably guided in each associated, placed on the pump housing pump cylinder heads.
  • a low pressure unit which receives the low pressure circuit is attached to the pump housing.
  • Connected to the high-pressure fuel pump is an electronic control device which detects how much fuel is being delivered by the high-pressure fuel pump. A change in the amount of fuel delivered by the high-pressure fuel pump is not provided.
  • the high-pressure fuel pump according to the invention with the features of claim 1 has the advantage that a metering of the fuel to be compressed is made possible by the metering unit and that the metering unit is reliably protected in this arrangement from mechanical effects, so that the reliability of the system is increased.
  • a delivery pump is placed on the side facing away from the pump housing side of the low pressure unit.
  • the feed pump is realized in the manner of a gear pump. This type of execution is a compact and reliable solution.
  • the pump housing and / or the pump cylinder heads project beyond the low-pressure unit arranged connections of the low-pressure circuit. This has the advantage that thus connections of the low-pressure circuit through the pump housing and the pump cylinder heads are effectively shielded from mechanical effects.
  • a drive of the feed pump via the pump camshaft This eliminates a separate drive the pump, which further increases the compactness of the system.
  • the production cost of the high-pressure fuel pump can be further minimized.
  • bearings of the pump camshaft are designed in the manner of plain bearings.
  • the sole FIGURE shows a longitudinal section of the high-pressure fuel pump according to the invention, in which a pump camshaft 1 is mounted in a pump housing 3 via slide bearings 2a and 2b.
  • the pump camshaft 1 further has a polygonal training 4, via which it is in contact with two pump pistons 5a and 5b, which are guided displaceably in each case in placed on the pump housing pump cylinder heads 6a and 6b.
  • a rotational movement of the pump camshaft 1 via the polygonal training 4 in each case a translational movement of the pump piston 5a and 5b implemented.
  • a pressure chamber 7a and 7b is arranged, in each of which at a downward movement of the respective pump piston 5a or 5b via an associated suction valve 8a or 8b fuel is sucked and then during an upward movement
  • the respective pump piston 5 a or 5 b is compressed and fed via a respective associated high-pressure valve 9 a or 9 b a high-pressure circuit and thus a - not shown here - high-pressure accumulator.
  • a low pressure unit 10 is attached to the pump housing 3, which receives the low pressure circuit.
  • a metering unit 12 which is only indicated by dashed lines in the view, is integrated into the low-pressure unit 10 on a side facing the pump housing 3. Furthermore, ports 13a and 13b of the low-pressure circuit are surmounted by the pump housing 3 and the pump cylinder heads 6a and 6b, so that these ports 13a and 13b are shielded against mechanical effects.
  • the Pump housing 3 are formed as a standard housing, since different courses of the pressure lines of the low-pressure circuit must be varied only in this low-pressure unit 10.

Landscapes

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

Claims (7)

  1. Pompe à carburant haute pression pour le fonctionnement d'un moteur à combustion interne comprenant un carter de pompe (3) dans lequel est supporté un arbre à cames de pompe (1) et qui est en liaison, par le biais d'une réalisation polygonale (4), avec au moins deux pistons de pompe (5a, 5b), qui sont guidés de manière déplaçable dans des culasses de pompe (6a, 6b) respectivement associées, posées sur le carter de pompe (3), une conversion du mouvement de rotation de l'arbre à cames de pompe (1) en des mouvements de translation respectifs des au moins deux pistons de pompe (5a, 5b) se produisant, afin de comprimer du carburant hors d'un circuit basse pression et de le refouler vers un accumulateur haute pression, une unité basse pression (10), qui reçoit le circuit basse pression, étant fixée au carter de pompe (3), caractérisée en ce qu'une unité de dosage (12), située à l'extérieur du carter de pompe (3), est intégrée dans l'unité basse pression (10) pour le dosage du carburant à comprimer du côté tourné vers le carter de pompe (3) .
  2. Pompe à carburant haute pression selon la revendication 1, caractérisée en ce que qu'une pompe de refoulement est posée du côté de l'unité basse pression (10) opposé au carter de pompe (3).
  3. Pompe à carburant haute pression selon la revendication 2, caractérisée en ce que la pompe de refoulement est réalisée à la manière d'une pompe à engrenages (11).
  4. Pompe à carburant haute pression selon l'une quelconque des revendications précédentes, caractérisée en ce que le carter de pompe (3) et/ou les culasses de pompe (6a, 6b) font saillie au-delà de raccords (13a, 13b) du circuit basse pression disposés au niveau de l'unité basse pression (10).
  5. Pompe à carburant haute pression selon la revendication 2, caractérisée en ce qu'un entraînement de la pompe de refoulement s'effectue par le biais de l'arbre à cames de pompe (1).
  6. Pompe à carburant haute pression selon l'une quelconque des revendications précédentes, caractérisée en ce que des supports sur palier de l'arbre à cames de pompe (1) sont réalisés à la manière de paliers lisses (2a, 2b).
  7. Moteur à combustion interne destiné à l'entraînement d'un véhicule automobile comprenant une pompe à carburant haute pression selon l'une quelconque des revendications 1 à 6.
EP09779639.5A 2008-08-04 2009-06-05 Pompe a carburant haute pression Not-in-force EP2310679B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008040966A DE102008040966A1 (de) 2008-08-04 2008-08-04 Hochdruckkraftstoffpumpe
PCT/EP2009/056913 WO2010015436A1 (fr) 2008-08-04 2009-06-05 Pompe à carburant haute pression

Publications (2)

Publication Number Publication Date
EP2310679A1 EP2310679A1 (fr) 2011-04-20
EP2310679B1 true EP2310679B1 (fr) 2018-01-24

Family

ID=41077992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09779639.5A Not-in-force EP2310679B1 (fr) 2008-08-04 2009-06-05 Pompe a carburant haute pression

Country Status (5)

Country Link
EP (1) EP2310679B1 (fr)
CN (1) CN102105688B (fr)
DE (1) DE102008040966A1 (fr)
RU (1) RU2516081C2 (fr)
WO (1) WO2010015436A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2068110C1 (ru) * 1992-01-29 1996-10-20 Олег Иванович Савинов Система впрыскивания топлива двигателя внутреннего сгорания
RU2116496C1 (ru) * 1994-10-24 1998-07-27 Александр Алексеевич Пустынцев Многофункциональный блок-насос
IT239879Y1 (it) 1996-12-23 2001-03-13 Elasis Sistema Ricerca Fiat Perfezionamenti ad una pompa a pistoni, in particolare ad una pompa apistoni radiali per il carburante di un motore a combustione interna.
DE19736160A1 (de) * 1997-08-20 1999-02-25 Bosch Gmbh Robert Pumpenanordnung zur Kraftstoffhochdruckversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
DE10228551A1 (de) * 2002-06-26 2004-01-22 Siemens Ag Radialkolbenpumpe
DE10337847A1 (de) * 2003-08-18 2005-03-17 Robert Bosch Gmbh Pumpenanordnung mit einer Hochdruckpumpe und einer dieser vorgeschalteten Niederdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
US8061328B2 (en) * 2005-03-09 2011-11-22 Caterpillar Inc. High pressure pump and method of reducing fluid mixing within same
JP2007154711A (ja) * 2005-12-02 2007-06-21 Denso Corp 燃料噴射ポンプ

Also Published As

Publication number Publication date
DE102008040966A1 (de) 2010-02-11
WO2010015436A1 (fr) 2010-02-11
EP2310679A1 (fr) 2011-04-20
CN102105688B (zh) 2015-11-25
RU2011108007A (ru) 2012-09-10
CN102105688A (zh) 2011-06-22
RU2516081C2 (ru) 2014-05-20

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