EP1537325B1 - Dispositif d'injection de carburant pour moteur a combustion interne - Google Patents

Dispositif d'injection de carburant pour moteur a combustion interne Download PDF

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Publication number
EP1537325B1
EP1537325B1 EP03714634.7A EP03714634A EP1537325B1 EP 1537325 B1 EP1537325 B1 EP 1537325B1 EP 03714634 A EP03714634 A EP 03714634A EP 1537325 B1 EP1537325 B1 EP 1537325B1
Authority
EP
European Patent Office
Prior art keywords
fuel
filter
pump
pressure
pressure pump
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
EP03714634.7A
Other languages
German (de)
English (en)
Other versions
EP1537325A1 (fr
Inventor
Achim Koehler
Sascha Ambrock
Thomas Boehm
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 EP1537325A1 publication Critical patent/EP1537325A1/fr
Application granted granted Critical
Publication of EP1537325B1 publication Critical patent/EP1537325B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • 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
    • 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
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • 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
    • F02M55/007—Venting means

Definitions

  • Such a fuel injection device is characterized by the DE 198 39 579 C1 known.
  • This fuel injection device comprises a high-pressure pump, is conveyed by the fuel under high pressure in a memory, and a feed pump, is conveyed by the fuel from a fuel tank to the high-pressure pump.
  • a fuel metering device is arranged, through which the inflow of fuel to the high pressure pump is adjusted. From the connection between the feed pump and the fuel metering device performs a bypass connection with a pressure valve to a discharge area.
  • An inflow of fuel from the feed pump to the fuel metering device and / or the bypass connection is effected by at least one channel in a housing part of the high-pressure pump.
  • the fuel injection device according to the invention with the features of claim 1 has the advantage that the bypass connection and the pressure valve are protected from contamination. This can be done by the same fuel filter as the protection of the fuel metering device or by a second additional fuel filter.
  • an electric control valve 22 is respectively arranged, through which an opening of the injectors is controlled, so as to effect a fuel injection by the respective injector 20 or to prevent fuel injection.
  • the control valves 22 are controlled by an electronic control device 23, is determined by the function of operating parameters of the internal combustion engine, such as speed, load, temperature and others, the timing and duration of the fuel injection by the injectors 20.
  • From the injectors 20 introduces Return for unused fuel at least indirectly, for example, via a common line for all injectors 24 in the fuel tank 10 back.
  • From the memory 16 may also be a line 26 return to the fuel tank 10, in which a pressure relief valve 28 is arranged to prevent an unacceptably high pressure builds up in the memory 16.
  • the high pressure pump 14 may be formed as a radial piston pump and has a plurality, for example, three equally spaced angularly spaced pump elements 30, each having a driven by a polygon 32 in conjunction with an eccentric shaft in a lifting movement, guided in a cylinder bore 35 pump piston 34 which each limit a pump working space 36.
  • a check valve opening toward the reservoir 16 is arranged as an outlet valve 38, by which the separation between the pump working chambers 36 and the reservoir 16 takes place during the suction stroke of the pump piston 34.
  • a check valve opening towards the pump work spaces 36 is arranged as an inlet valve 39 through which the separation between the pump working chambers 36 and the feed pump 12 takes place during the delivery stroke of the pump piston 34.
  • the pump pistons 34 when they are move radially inward, the pump working spaces 36 are connected with open inlet valves 39 to the outlet of the feed pump 12 and are filled with fuel, wherein the pump working spaces 36 are separated by the closed exhaust valves 38 from the memory 16.
  • the pump work spaces 36 are connected to the reservoir 16 with the exhaust valves 38 open and separated from the outlet of the delivery pump 12 by the closed intake valves 39.
  • a fuel filter 40 is arranged between the feed pump 12 and the high-pressure pump 14. Between the feed pump 12 and the high-pressure pump 14, a fuel filter 40 is arranged. Between the feed pump 12 and the fuel tank 10 may be arranged another fuel filter.
  • the fuel filter 42 may be formed, for example, as a coarse filter and the fuel filter 40 as a fine filter, the fine filter 40 may additionally have a water separator.
  • a fuel metering device 44 is arranged between the feed pump 12 and the high-pressure pump 14.
  • the fuel metering device 44 has a control valve 46 actuated by an electric actuator 45, for example an electromagnet or a piezoactuator, by means of which the flow rate from the feed pump 12 to the high-pressure pump 14 can be continuously adjusted.
  • the fuel metering device 44 is also controlled by the control device 23, in such a way that the pump 12, a fuel quantity of the high pressure pump 14 is supplied, which in turn is then pumped by the high-pressure pump 14 under high pressure in the memory 16 to 16 in the memory a predetermined To maintain dependent on operating parameters of the internal combustion engine pressure.
  • It is a pressure sensor 29 is provided, through which the pressure in the memory 16 is detected and with the control device 23 is connected, so that a signal for the actual pressure in the memory 16 is supplied and this can drive the fuel metering device 44 accordingly.
  • the fuel metering device 44 is arranged on a housing part 48 of the high-pressure pump 14, which is for example a cover of the high-pressure pump 14.
  • An inlet to the fuel metering device 44 from the feed pump 12 extends, for example, as at least one bore 50 through the housing part 48.
  • a further fuel filter 52 is inserted in the bore 50.
  • the fuel filter 52 is, for example, as in FIG FIG. 4 shown formed as a rod filter which is elongated to achieve a large surface area.
  • the fuel filter 52 has a finger-shaped filter screen 53 which is closed at one end and open at the other end, and a support member 54 with radial webs, which is pressed into the bore 50, wherein between the filter screen 53 and the bore 50 is a distance is.
  • the fuel enters from the feed pump 12 through the open end into the filter screen 53 and passes through the filter screen 53 in the circumferential direction and flows through the bore 50 on to the fuel metering device 44. If in the bore 50 from the processing of the housing part 48 ago Impurities, for example in the form of burrs or metal shavings are present, they are retained by the fuel filter 52, so that they can not get to the fuel metering device 44 and affect their function.
  • the filter 53 preferably has a mesh size between about 20 ⁇ m and 500 ⁇ m.
  • a lubricating connection 62 to the drive portion of the high-pressure pump 14, which is formed inter alia by the eccentric shaft and the polygon 32.
  • fuel is supplied to the drive region of the high-pressure pump 14 for its lubrication and cooling.
  • a throttle point 64 is preferably arranged in order to limit the flow. From the drive range of the high-pressure pump 14, connections 65, 66 lead to the return line 24, through which fuel can flow out of the drive range of the high-pressure pump 14, it being possible in each case to arrange a throttle point in the connections 65, 66.
  • the fuel filter 60 thus also impurities from the drive range of the high-pressure pump 14 are kept away, which could lead to wear and damage there.
  • the fuel injection device according to a second embodiment is shown, which differs from the first embodiment in that only one further fuel filter 152 is provided, which is inserted into the bore 150 upstream of the branch of the bypass connection 56.
  • the fuel filter 152 the fuel metering device 44, the pressure valve 58 and the drive portion of the high-pressure pump 14 are protected by a single further fuel filter 152 from contamination.
  • connection 257 allows venting between the feed pump 212 and the fuel metering device 44, wherein through the throttle point 259, the flow through the connection 257 is limited.
  • the feed pump 212 may be upstream of a throttle 213 to limit the flow to the feed pump 212.
  • a second further fuel filter 260 are arranged.

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

Claims (6)

  1. Dispositif d'injection de carburant pour un moteur à combustion interne comprenant une pompe haute pression (14), qui refoule du carburant haute pression dans un accumulateur (16), comprenant une pompe d'alimentation (12 ; 212) par laquelle du carburant est refoulé depuis un réservoir de carburant (10) jusqu'à la pompe haute pression (14), comprenant un dispositif de dosage de carburant (44) disposé entre la pompe d'alimentation (12 ; 212) et la pompe haute pression (14), par lequel l'afflux de carburant à la pompe haute pression (14) est ajusté, comprenant une conduite de dérivation (56 ; 256) partant de la connexion entre la pompe d'alimentation (12 ; 212) et le dispositif de dosage de carburant (44) avec une soupape de pression (58 ; 258) jusqu'à une zone de détente, un afflux de carburant depuis la pompe d'alimentation (12 ; 212) jusqu'au dispositif de dosage de carburant (44) et/ou jusqu'à la conduite de dérivation (56 ; 256) se produisant par au moins un canal (50 ; 150 ; 250) dans une partie de boîtier (48 ; 248) de la pompe haute pression (14) et au moins un filtre à carburant (40, 42) disposé à l'extérieur de la partie de boîtier (48 ; 248) étant prévu entre le réservoir de carburant (10) et la pompe haute pression (14), au moins un filtre à carburant supplémentaire (52 ; 152) étant disposé en amont avant le dispositif de dosage de carburant (44) dans au moins un canal (50, 150 ; 250), caractérisé en ce que l'au moins un filtre à carburant supplémentaire (152) est disposé en amont avant la conduite de dérivation (56) ou en ce qu'au moins un deuxième filtre à carburant supplémentaire (60) est disposé en plus de l'au moins un filtre à carburant supplémentaire (52) dans la conduite de dérivation (56).
  2. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que l'au moins un filtre à carburant supplémentaire (52 ; 152) et/ou l'au moins un deuxième filtre à carburant supplémentaire (60) est/sont réalisé(s) sous forme de filtre-tige inséré dans le canal (50 ; 150 ; 250) ou la conduite de dérivation (56).
  3. Dispositif d'injection de carburant selon la revendication 1 ou 2, caractérisé en ce que l'au moins un filtre à carburant supplémentaire (52 ; 152 ; 252) et/ou l'au moins un deuxième filtre à carburant supplémentaire (60) est/sont réalisé(s) sous forme de filtre à tamis.
  4. Dispositif d'injection de carburant selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'au moins un filtre à carburant supplémentaire (152) est disposé dans un canal (150) se ramifiant en aval après l'au moins un filtre à carburant supplémentaire (152) vers le dispositif de dosage de carburant (44) et vers la conduite de dérivation (56).
  5. Dispositif d'injection de carburant selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'en amont de la conduite de dérivation (56) avant la soupape de pression (58) bifurque une connexion de lubrifiant (62) vers une région d'entraînement (32) de la pompe haute pression (14) et en ce que l'au moins un filtre à carburant supplémentaire (152) ou l'au moins un deuxième filtre à carburant supplémentaire (60) est disposé en amont avant la ramification de la connexion de lubrifiant (62).
  6. Dispositif d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie de boîtier (48) est une partie de recouvrement de la pompe haute pression (14).
EP03714634.7A 2002-08-28 2003-02-11 Dispositif d'injection de carburant pour moteur a combustion interne Expired - Lifetime EP1537325B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10239429A DE10239429A1 (de) 2002-08-28 2002-08-28 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10239429 2002-08-28
PCT/DE2003/000382 WO2004020816A1 (fr) 2002-08-28 2003-02-11 Dispositif d'injection de carburant pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1537325A1 EP1537325A1 (fr) 2005-06-08
EP1537325B1 true EP1537325B1 (fr) 2014-04-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03714634.7A Expired - Lifetime EP1537325B1 (fr) 2002-08-28 2003-02-11 Dispositif d'injection de carburant pour moteur a combustion interne

Country Status (5)

Country Link
US (1) US7128054B2 (fr)
EP (1) EP1537325B1 (fr)
JP (1) JP2005536680A (fr)
DE (1) DE10239429A1 (fr)
WO (1) WO2004020816A1 (fr)

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JP4450211B2 (ja) 2005-01-28 2010-04-14 株式会社デンソー 燃料供給装置
DE102005022738A1 (de) * 2005-05-18 2006-11-23 Schaeffler Kg Druckventil für eine Kraftstoffeinspritzvorrichtung einer Brennkraftmaschine
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EP1923562B1 (fr) 2006-11-16 2011-11-02 C.R.F. Società Consortile per Azioni Ajustement de carburant et dispositif de réglage pour une pompe à haute pression
KR100877851B1 (ko) * 2006-12-12 2009-01-13 현대자동차주식회사 디젤엔진의 연료 유로 자동 변환기
EP2017462B1 (fr) 2007-06-21 2010-06-02 Ford Global Technologies, LLC Procédé et appareil pour nettoyer une ligne de fluide
JP4433043B2 (ja) * 2007-12-05 2010-03-17 株式会社デンソー 燃料供給装置
DE602008003300D1 (de) * 2008-03-04 2010-12-16 Magneti Marelli Spa Common Rail Direkteinspritzanordnung mit einem Absperrventil zur Steuerung der Förderung einer Hochdruckkraftstoffpumpe
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JP4930521B2 (ja) * 2009-02-02 2012-05-16 株式会社デンソー 燃料供給装置
DE102009028023A1 (de) * 2009-07-27 2011-02-03 Robert Bosch Gmbh Hochdruck-Einspritzsystem mit Kraftstoffkühlung aus Niederdruckbereich
DE102011002755A1 (de) * 2011-01-17 2012-07-19 Robert Bosch Gmbh Niederdruckkreis für ein Kraftstoffeinspritzsystem sowie Kraftstoffeinspritzsystem
JP5823201B2 (ja) * 2011-07-25 2015-11-25 日野自動車株式会社 燃料噴射装置
CN208294684U (zh) * 2015-04-28 2018-12-28 瓦锡兰芬兰有限公司 用于内燃发动机的燃料供应装置
WO2019129447A1 (fr) * 2017-12-27 2019-07-04 Robert Bosch Gmbh Unité pompe permettant d'alimenter un moteur à combustion interne en carburant et procédé de refroidissement de ladite unité
IT201900006865A1 (it) * 2019-05-15 2020-11-15 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

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Also Published As

Publication number Publication date
DE10239429A1 (de) 2004-03-11
US7128054B2 (en) 2006-10-31
EP1537325A1 (fr) 2005-06-08
US20060016432A1 (en) 2006-01-26
JP2005536680A (ja) 2005-12-02
WO2004020816A1 (fr) 2004-03-11

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