EP1599668A1 - Dispositif d'injection de carburant pour un moteur a combustion interne - Google Patents

Dispositif d'injection de carburant pour un moteur a combustion interne

Info

Publication number
EP1599668A1
EP1599668A1 EP03773513A EP03773513A EP1599668A1 EP 1599668 A1 EP1599668 A1 EP 1599668A1 EP 03773513 A EP03773513 A EP 03773513A EP 03773513 A EP03773513 A EP 03773513A EP 1599668 A1 EP1599668 A1 EP 1599668A1
Authority
EP
European Patent Office
Prior art keywords
pump
fuel
interior
injection device
fuel injection
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.)
Granted
Application number
EP03773513A
Other languages
German (de)
English (en)
Other versions
EP1599668B1 (fr
Inventor
Peter Boehland
Godehard Nentwig
Michael Bauer
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 EP1599668A1 publication Critical patent/EP1599668A1/fr
Application granted granted Critical
Publication of EP1599668B1 publication Critical patent/EP1599668B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M59/08—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 two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention is based on one
  • Fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is known from WO 01/40656 A.
  • This fuel injection device has a high-pressure pump, through which fuel is conveyed into a memory, from which fuel is taken for injection at the internal combustion engine.
  • a feed pump is provided, through which fuel is delivered from a fuel tank to the high-pressure pump.
  • the high-pressure pump has a housing and at least one pump element which is driven by a drive arranged in an interior of the housing.
  • the pump element has a pump piston which is driven by the drive in a stroke movement and which delimits a pump working space.
  • the feed pump can be driven electrically or mechanically. In order to be able to generate a sufficiently high pressure, a powerful and correspondingly expensive drive for the feed pump is required. Alternatively, a feed pump with an electric drive of low power and in addition, a feed pump can be combined with a mechanical drive, which is also expensive.
  • the fuel injection device with the features according to claim 1 has the advantage that the high-pressure pump also forms a feed pump through which the fuel to be drawn in during its suction strokes is conveyed.
  • the feed pump, the high pressure pump is supported by the ⁇ fuel from the fuel tank into the interior of the housing, besides may be designed in accordance with cost and low power.
  • the embodiment according to claim 2 enables continuous operation of the feed pump, in that fuel delivered by it when the check valve is closed
  • Discharge area can flow.
  • the embodiment according to claim 6 enables a delivery rate that is greater than the required suction rate of the pump element and thus also an overflow rate through which the drive can be lubricated and cooled in the interior of the housing.
  • Fuel injection device for an internal combustion engine in a schematic representation with a high pressure pump at the end of the delivery stroke of its pump elements and FIG. 2 the high pressure pump at the end of the suction stroke of its pump elements. Description of the embodiment
  • FIG. 1 shows a fuel injection device of an internal combustion engine, for example of a motor vehicle, which has a high-pressure pump 10.
  • the high-pressure pump 10 delivers fuel under high pressure into a reservoir 12, from which fuel is taken for injection at the internal combustion engine.
  • An injector 14 is arranged on each cylinder of the internal combustion engine and is connected to the accumulator 12 via a line 16.
  • the injector 14 has a control valve 18 which is controlled by an electronic control device 20 and by which the opening of the injector 14 and thus the fuel injection is controlled.
  • a feed pump 22 delivers fuel from a fuel reservoir 24 to the high-pressure pump 10.
  • the feed pump 22 preferably has an electric drive, but can also be mechanically driven.
  • a filter 26 is arranged between the feed pump 22 and the high pressure pump 10 in order to filter the fuel delivered by the high pressure pump 10.
  • the high-pressure pump 10 has a housing 30, in which a drive shaft 32 is rotatably mounted about an axis 33 in an interior 31.
  • the drive shaft 32 is driven, for example, by the internal combustion engine.
  • the drive shaft 32 has at least one cam 34 in the interior 31, a double cam being provided in the exemplary embodiment shown, which cam has two diametrically opposed cam lobes.
  • the high-pressure pump 10 has at least one pump element 36 arranged in the housing 30, two pump elements 36 lying diametrically opposite one another being provided in the exemplary embodiment shown.
  • each Pump element 36 has a pump piston 38 which is tightly guided in a cylinder bore 40 which extends at least approximately radially to the axis of rotation 33 of the drive shaft 32 and which defines a pump working space 42 with its outwardly facing end face.
  • Cylinder bore 40 can be formed directly in housing 30 or in an insert inserted into housing 30.
  • the pump piston 38 projects with its radially inward end out of the cylinder bore 40 and is supported on the cam 34 of the drive shaft 30 by means of a tappet 44.
  • the plunger 44 is tightly guided in a bore 46 in the housing 30 and preferably has a larger diameter than the pump piston 38 in its area delimiting the pump working space 42.
  • the pump piston 38 has on its piston foot 39, with which it is supported on the plunger 44, a larger diameter than in its area delimiting the pump working space 42 and an approximately the same diameter as the plunger 44.
  • a preloaded spring 48 for example in the form of a helical compression spring, is clamped between the housing 30 and the piston foot 39, by means of which the pump piston 38 and, via its piston foot 39, the plunger 44 are held in contact with the cam 34 of the drive shaft 32.
  • a cylindrical roller 50 is inserted, which rolls on the cam 34.
  • the tappet 44 with its part facing away from the pump piston 38 and protruding from the bore 46, delimits the interior 31 of the housing 30.
  • the tappet 44 can also be omitted, the pump piston 38 then being arranged over its piston foot 39, in which, for example, a roller 50 is arranged can, supported directly on the cam 34.
  • the fuel delivered by the feed pump 22 is fed via a line 23 to the interior 31 of the housing 30 of the high-pressure pump 10.
  • a check valve 52 opening towards the interior 31 is arranged in the line 23, this prevents fuel from flowing back to the feed pump 22 from the interior 31.
  • a line 54 leads from the line 23 between the feed pump 22 and the check valve 52 to a relief region, which can be, for example, a return 55 to the fuel reservoir 24.
  • a line 56 leads from the interior 31 of the housing 30 of the high-pressure pump 10 to a relief area, which in turn can be the return 55 to the fuel reservoir 24.
  • a pressure valve 58 is arranged, which connects to
  • Returns 55 only releases when a predetermined pressure in the interior 31 is exceeded and keeps the connection to the return 55 closed at a lower pressure.
  • an inlet 60 opens, in which a check valve 62 opening into the pump work chamber 42 is arranged as an inlet valve.
  • a drain 64 leads from the pump work chamber 42, which ends in the reservoir 12 and in which a check valve 66 opening from the pump work chamber 42 to the reservoir 12 is arranged as an outlet valve.
  • the inlet 60 of the pump work spaces 42 of the pump elements 36 is connected to the interior 31 of the housing 30 of the high pressure pump 10.
  • the pump pistons 38 of the pump elements 36 deliver synchronously with one another, that is to say they execute their respective delivery stroke and their respective suction stroke simultaneously.
  • the pump pistons 38 When the pump pistons 38 carry out their suction stroke, they move through the springs 48 in accordance with the profile of the cam 34, against which the tappets 44 rest against the rollers 50, radially inwards and their tappets 44 move out of the bore 46 into the interior 31.
  • the volume of the interior 31 is reduced, so that the pressure in the interior 31 increases, the check valve 52 preventing fuel from being displaced into the return 55.
  • the suction stroke of the pump pistons 38 there is a lower pressure in the pump workrooms 42 than in the interior 31, so that fuel is displaced from the interior 31 when the inlet valves 62 are open and is pumped into the pump workrooms 42.
  • the inlet valves 62 close and when a predetermined pressure is exceeded, the outlet valves 66 open, so that fuel is conveyed into the accumulator 12 via the outlet 64.
  • the feed pump 22 continuously delivers fuel and the fuel delivered by the feed pump 22 when the check valve 52 is closed flows via the line 54 into the return 55.
  • the feed pump 22 only needs to generate a relatively low pressure in order to be able to fill the interior 31 with fuel.
  • an interior 31 is caused by them generates relatively high pressure, which enables sufficient and rapid filling of the pump work spaces 42.
  • the tappets 44 have approximately the same diameter as the pump pistons 38 in their area delimiting the respective pump working space 42, so that a correspondingly smaller amount of fuel is delivered through the tappets 44.
  • FIG. 2 shows the high-pressure pump 10 at the end of the suction stroke of the pump pistons 38, in which the pump pistons 38 are in the region of their inner dead center.
  • the plungers 44 are immersed the most out of the bores 46 into the interior 31, so that the volume of the interior 31 is smallest.
  • the inlet valves 62 are open, the outlet valves 66 and the check valve 52 are closed.

Abstract

L'invention concerne un dispositif d'injection de carburant qui comprend une pompe haute pression (10) servant à refouler du carburant dans un accumulateur (12) duquel le carburant est prélevé afin d'être injecté dans le moteur à combustion interne. Le carburant est acheminé par une pompe d'alimentation (22) d'un réservoir de stockage de carburant (24) à la pompe haute pression (10). La pompe haute pression (10) présente un carter (30) comprenant un espace intérieur (31) où est placé un entraînement (32, 34) pour au moins un élément (36) de la pompe haute pression (10). Cet élément de pompe (36) présente un piston de pompe (38) qui est entraîné dans un mouvement de course par l'entraînement (32, 34) et qui délimite un espace de travail de pompe (42) dans lequel du carburant est amené par l'intermédiaire d'une arrivée (60) lors d'une course d'admission du piston de pompe (38) et hors duquel le carburant est refoulé dans l'accumulateur (12) par l'intermédiaire d'une évacuation (64) lors d'une course de refoulement du piston de pompe (38). Le piston de pompe (38) se déplace en direction de l'espace intérieur (31) lors de sa course d'admission et s'éloigne de l'espace intérieur (31) lors de sa course de refoulement. La pompe d'alimentation (22) refoule le carburant dans l'espace intérieur (31) par l'intermédiaire d'une liaison (23) présentant une soupape antiretour (52) s'ouvrant en direction de l'espace intérieur (31) du carter (30) et l'arrivée (60) de l'espace de travail de pompe (42) est reliée à l'espace intérieur (31).
EP03773513A 2003-02-25 2003-10-13 Dispositif d'injection de carburant pour un moteur a combustion interne Expired - Lifetime EP1599668B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10307877A DE10307877A1 (de) 2003-02-25 2003-02-25 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10307877 2003-02-25
PCT/DE2003/003394 WO2004076847A1 (fr) 2003-02-25 2003-10-13 Dispositif d'injection de carburant pour un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1599668A1 true EP1599668A1 (fr) 2005-11-30
EP1599668B1 EP1599668B1 (fr) 2006-07-26

Family

ID=32797716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03773513A Expired - Lifetime EP1599668B1 (fr) 2003-02-25 2003-10-13 Dispositif d'injection de carburant pour un moteur a combustion interne

Country Status (5)

Country Link
US (1) US7850435B2 (fr)
EP (1) EP1599668B1 (fr)
JP (1) JP4461026B2 (fr)
DE (2) DE10307877A1 (fr)
WO (1) WO2004076847A1 (fr)

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
DE102007038519A1 (de) * 2007-06-28 2009-01-02 Robert Bosch Gmbh Hochdruckkraftstoffpumpenanordnung, die über den Ventiltrieb einer Brennkraftmaschine angetrieben wird
DE102007034036A1 (de) * 2007-07-20 2009-01-22 Robert Bosch Gmbh Kraftstoffhochdruckpumpe mit Rollenstößel
JP5094349B2 (ja) * 2007-11-30 2012-12-12 株式会社日立産機システム シリンダ装置、圧縮機およびシリンダ装置の製造方法
US20100119393A1 (en) * 2008-11-12 2010-05-13 Delphi Technologies, Inc. Hydraulic pump assembly
IT1395139B1 (it) * 2009-08-06 2012-09-05 Bosch Gmbh Robert Pompa di alta pressione per alimentare combustibile ad un motore a combustione interna
DE102011004939A1 (de) 2011-03-02 2012-09-06 Robert Bosch Gmbh Kraftstofffördereinrichtung und Verfahren zum Betätigen einer Kraftstofffördereinrichtung
CN102979732B (zh) * 2012-10-30 2015-10-28 无锡鸿声铝业有限公司 真空旋转密封泵滚珠摩擦进油结构
DE102012224408A1 (de) * 2012-12-27 2014-07-17 Robert Bosch Gmbh Kraftstoffeinspritzsystem
JP6040912B2 (ja) * 2013-11-12 2016-12-07 株式会社デンソー 高圧ポンプ
DE102014225982A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
EP3808968A1 (fr) * 2019-10-16 2021-04-21 Volvo Car Corporation Agencement de transfert de force d'un arbre à cames vers un dispositif de sortie

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DE19531811A1 (de) * 1995-08-30 1997-03-06 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
WO1999043949A2 (fr) * 1998-02-27 1999-09-02 Stanadyne Automotive Corp. Pompe d'alimentation pour rampe d'alimentation en essence
US6694950B2 (en) * 1999-02-17 2004-02-24 Stanadyne Corporation Hybrid control method for fuel pump using intermittent recirculation at low and high engine speeds
DE19926308A1 (de) * 1999-06-09 2000-12-21 Bosch Gmbh Robert Pumpenanordnung für Kraftstoff
DE19933567C1 (de) 1999-07-16 2001-02-01 Siemens Ag Einspritzsystem für eine Brennkraftmaschine
DE19937673A1 (de) 1999-08-10 2001-02-22 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
IT1310754B1 (it) * 1999-11-30 2002-02-22 Elasis Sistema Ricerca Fiat Sistema di valvole per il controllo della pressione di ingresso di unliquido in una pompa ad alta pressione, e relativa valvola di
DE10010945B4 (de) 2000-03-06 2004-07-22 Robert Bosch Gmbh Pumpe zur Versorgung eines Kraftstoffeinspritzsystems und einer hydraulischen Ventilsteuerung für Brennkraftmaschinen
US6722864B2 (en) * 2001-12-12 2004-04-20 Denso Corporation Fuel injection pump
DE10200792A1 (de) * 2002-01-11 2003-07-31 Bosch Gmbh Robert Kraftstoffpumpe für eine Brennkraftmaschine
EP1803933B1 (fr) * 2005-12-27 2010-05-19 C.R.F. Societa Consortile per Azioni Pompe haute pression de carburant, avec le carter en communication avec l'arrivée de carburant

Non-Patent Citations (1)

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Title
See references of WO2004076847A1 *

Also Published As

Publication number Publication date
DE10307877A1 (de) 2004-09-02
JP4461026B2 (ja) 2010-05-12
EP1599668B1 (fr) 2006-07-26
US20060193736A1 (en) 2006-08-31
WO2004076847A1 (fr) 2004-09-10
US7850435B2 (en) 2010-12-14
DE50304406D1 (de) 2006-09-07
JP2006514202A (ja) 2006-04-27

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