EP1361359B1 - Dispositif d'injection de carburant pour moteurs à combustion interne - Google Patents

Dispositif d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
EP1361359B1
EP1361359B1 EP03009123A EP03009123A EP1361359B1 EP 1361359 B1 EP1361359 B1 EP 1361359B1 EP 03009123 A EP03009123 A EP 03009123A EP 03009123 A EP03009123 A EP 03009123A EP 1361359 B1 EP1361359 B1 EP 1361359B1
Authority
EP
European Patent Office
Prior art keywords
fuel
pressure
return
internal combustion
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
EP03009123A
Other languages
German (de)
English (en)
Other versions
EP1361359A1 (fr
Inventor
Math Lemoure
Juergen Hammer
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 EP1361359A1 publication Critical patent/EP1361359A1/fr
Application granted granted Critical
Publication of EP1361359B1 publication Critical patent/EP1361359B1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M63/02—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 a Fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is known from Literature, for example Diesel engine management, publishing house Vieweg, 2nd edition 1998, page 262, known.
  • These Fuel injection device has a high-pressure pump through which fuel is pumped into a store. Through a feed pump, fuel from a Fuel tank to the suction side of the high-pressure pump promoted. With the memory are on cylinders of the Internal combustion engine arranged injectors connected by the fuel is injected at the internal combustion engine. Of the injectors does not return a injected fuel into the fuel tank from. From the high pressure pump also performs a return for Fuel, for example, by leakage or in the Lubrication of the drive of the high pressure pump dissipate Fuel off to fuel tank.
  • a pressure regulating valve which operates electrically is, and through the fuel from the store via a Drain off in the fuel tank can.
  • the returns from the injectors and the High pressure pump and the drain from the high pressure pump are doing so to a return line to the fuel tank summarized.
  • the pressure control valve can for example, in overrun operation of the internal combustion engine, when No fuel injection takes place, the pressure in the store be reduced.
  • the Pressure in the memory also in the entire operating range of Internal combustion engine are regulated, in particular in Idling the engine a large amount of fuel must be removed from the memory.
  • the of the Injectors returned amount of fuel also fluctuates strong and depends on the operating condition of the internal combustion engine from.
  • the fuel injection device with the Features according to claim 1 has the advantage that by bringing together the returns of the injectors and the high pressure pump to a common return line with a throttle and the mouth of this return line after the pressure control valve the influence of pressure fluctuations due to the fluctuations in the return amount of the Injectors can be reduced.
  • the Throttling point for the injectors and the high-pressure pump be designed optimally and by the pressure control valve The amount of fuel removed does not need this to be considered.
  • FIG. 1 shows a Fuel injection device for an internal combustion engine of a motor vehicle in a schematic representation
  • Figure 2 a section of the fuel injection device according to a modified embodiment
  • Figure 3 shows a section the fuel injection device according to another modified version.
  • FIG 1 is a fuel injection device for a Internal combustion engine, for example, a motor vehicle shown.
  • the internal combustion engine is preferably one self-igniting internal combustion engine and has one or several cylinders on.
  • the fuel injector has a feed pump 10, through the fuel from a fuel tank 12 to the suction side of a High pressure pump 14 is promoted.
  • the high pressure pump 14 is mechanically driven by the internal combustion engine.
  • the Feed pump 10 is arranged on the high pressure pump 14, For example, flanged to this, and is by the High pressure pump 14 mechanically driven.
  • the feed pump 10 may be formed, for example, as a gear pump.
  • the feed pump 10 may be arranged one or more filters be such as a pre-filter 16 and a fine filter 18, which may also have a water separator.
  • a throttle point 20th be upstream, to limit by the feed pump 10 sucked amount of fuel.
  • the high-pressure pump 14 has, for example, several Pump elements 22, each one in a Cylinder bore 24 guided pump piston 26, the driven by a drive 28 in a lifting movement becomes.
  • the pump piston 26 is in the cylinder bore 24 a pump working space 30 limited in the suction stroke the pump piston 26 through a suction valve 32 fuel is sucked in and out of the delivery stroke of the pump piston 26 is displaced by an exhaust valve 34 fuel.
  • the Pressure side of the high-pressure pump 14 is via a line 36, to that of the pump work spaces 30 of the pump elements 22nd laxative pressure lines are summarized, with a Memory 38 connected.
  • the high-pressure pump 14 is Fuel under high pressure in the memory 38 promoted.
  • Each cylinder of the internal combustion engine is an injector 40 provided by the fuel into the combustion chamber of the Cylinder is injected.
  • Each injector 40 is above a Line 42 connected to the memory 38 and has a Fuel injection valve 44 and a control valve 46.
  • the control valve 46 is controlled by an electronic Control device 48 is controlled and determines the opening of the fuel injection valve 44 for Fuel injection.
  • a Fuel meter 50 is arranged, which is an electrical actuated control valve 52, through which the Flow area of the feed pump 10 to High pressure pump 14 is continuously variable between a maximum flow area and a minimum Flow area, which is at least approximately zero.
  • the Control valve 52 has an actuator 54, for example in the form an electromagnet, by the control device 48 depending on operating parameters of the internal combustion engine is controlled, such that the suction side of the High pressure pump 14 is supplied to a predetermined amount of fuel is and thus by the high-pressure pump 14 a predetermined Fuel quantity is conveyed into the memory 38.
  • a Bypass connection 56 From the connection 49 between the pressure side of Feed pump 10 and the suction side of the high-pressure pump 14 leads upstream of the fuel meter 50 a Bypass connection 56 from.
  • a Pressure valve 58 arranged through which a connection 60 to Drive 28 of the high-pressure pump 14 is controlled.
  • the pressure valve 58 is the Connection 60 to the drive 28 until it exceeds a predetermined pressure released so that at low pressure, especially when starting the internal combustion engine, first no fuel for the lubrication of the drive 28 is branched off, but the entire by the feed pump 10 delivered fuel amount of the high-pressure pump 14th is supplied.
  • a throttle point 62 Downstream of the pressure valve 58 is in the connection 60, a throttle point 62 arranged to the Limit flow of fuel to the drive 28. Parallel to the connection 60 is in the bypass connection 56th another connection 64 to the drive 28 is provided in the a further throttle point 66 is arranged.
  • the connection 64 with the throttle 66 allows venting, so that the suction side of the high-pressure pump 14 only fuel is fed and any air present in the drive 28 can escape.
  • connection 70 Downstream of the fuel meter 50 leads from the connection 49 of the pressure side of the feed pump 10 with the suction side of the high pressure pump 14 another connection 70 to a relief area from the suction side of the Feed pump 10 may be.
  • connection 70 is a Throttle 72 arranged. Under certain Operating conditions of the internal combustion engine, in particular in Push mode, may not by the high pressure pump 14 Fuel to be pumped into the memory 38 and thus the suction side of the high-pressure pump 14 may not be fuel be supplied. It may not be ensured be that by the fuel meter 50 of the Flow area of the compound 49 completely is closed, so that still fuel to the suction side of the High-pressure pump 14 passes.
  • the connection 70 serves to in In this case, the fuel from the suction side of the To dissipate high-pressure pump 14, so that it is not through the High pressure pump 14 is sucked. Through the throttle point 72nd the outflowing fuel quantity is limited.
  • the pressure in the memory 38 is determined by means of a pressure sensor 74 detected, which is connected to the controller 48. Of the Pressure in the memory 38 is through a pressure control valve 76th changeable, through which a drain 78 from the memory 38 to a discharge area is controlled, as the at least indirectly, the fuel tank 12 can serve. Of the Drain 78 is in the fuel tank 12 with a connected discharge line 79.
  • the pressure control valve 76 is driven by the controller 48 and can For example, be designed as a 2/2-way valve, the between an open and a closed position is switchable, or as a proportional valve, through the one Flow section is changed in the sequence 78.
  • the return 80 of the injectors 40 and the return 82 of the high pressure pump 14 are at a common return line 84 summarized in a Inlet 77 or in the outlet 78 of the pressure regulating valve 76th empties. In the return line 84 is upstream whose mouth into the pressure control valve 76, a throttle point 86 arranged.
  • the throttle body 86 is in its Dimensioning for the optimal function of the injectors 40 and the high pressure pump 14 designed.
  • the sequence 78 and the drain line 79 can be relatively large Cross section to be executed, even a relatively large by the pressure control valve 76 controlled amount of fuel to be able to dissipate without a high back pressure in the Drain line 79 is created.
  • Alternatively to the above explained embodiment may also dashed as in Figure 1 be provided that the common Return line 84 to the fuel tank 12th is guided or in the drain line 79 of the Pressure control valve 76 opens.
  • Fig. 2 the fuel injector is shown fragmentary according to a modified embodiment shown, in which the basic structure is the same as described above for Figure 1.
  • the return 80 of Injectors 40 and the return 82 of the high-pressure pump 14th open into a Y-shaped line section 88, which also may include the throttle body 86, and of which the common return line 84 discharges, over the Pressure control valve 76 or directly to Fuel tank 24 may be performed.
  • Fig. 3 the fuel injector is shown fragmentary according to another modified Execution shown, in which the basic structure again is the same as described above for Figure 1.
  • the return 80 of the injectors 40 is for High-pressure pump 14 out and there flows into the return 82nd the high pressure pump 14. From the high pressure pump 14 leads the common return line 84 to the pressure control valve 76 and opens into its inlet 77.
  • the throttle point 86 is included preferably at the high pressure pump 14, for example in a connecting piece 87 arranged thereon.

Claims (5)

  1. Installation d'injection de carburant pour un moteur à combustion interne comportant :
    une pompe haute pression (14) grâce à laquelle du carburant sous haute pression est refoulé dans un réservoir (38),
    une pompe de circulation (10) grâce à laquelle du carburant est refoulé d'un récipient de stockage à carburant (12) vers le côté admission de la pompe haute pression (14), des injecteurs (40) disposés sur des cylindres du moteur à combustion interne étant reliés au réservoir (38) et permettant d'injecter du carburant vers le moteur à combustion interne, et un reflux (80) pour le carburant non injecté conduit au moins indirectement depuis ces injecteurs dans le récipient de stockage à carburant (12),
    un reflux (82) pour du carburant menant au moins indirectement dans le récipient de stockage à carburant (12) depuis la pompe haute pression (14) et
    une soupape régulatrice de pression (76) actionnée électriquement grâce à laquelle du carburant peut être libéré du réservoir (38) au moins indirectement dans le récipient de stockage à carburant (12) par l'intermédiaire d'un écoulement (78),
    caractérisée en ce que
    le reflux (80) des injecteurs (40) et le reflux (82) de la pompe haute pression (14) débouchent dans une conduite de reflux (84) commune qui débouche au moins indirectement dans le récipient de stockage à carburant (12),
    un point d'étranglement (86) est placé dans la conduite de reflux (84) et
    l'écoulement (78) de la soupape régulatrice de pression (76) débouche au moins indirectement dans le récipient de stockage à carburant (12) par l'intermédiaire d'une conduite d'écoulement (79).
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le reflux (80) des injecteurs (40) va jusqu'à la pompe haute pression (14) et la conduite de reflux (84) commune part de celle-ci.
  3. Installation d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    la conduite de reflux (84) débouche dans une conduite d'écoulement (79) reliée à l'écoulement (78) de la soupape régulatrice de pression (76) et débouche au moins indirectement dans le récipient de stockage à carburant (12).
  4. Installation d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    la conduite de reflux (84) aboutit sur la soupape régulatrice de pression (76) dans une alimentation (77) ou dans son écoulement (78).
  5. Installation d'injection de carburant selon l'une des revendications 1 à 4,
    caractérisée en ce que
    lorsque le moteur à combustion interne a des conditions de fonctionnement prédéfinies, en particulier en fonctionnement de poussée, du carburant est libéré du réservoir (38) grâce à la soupape régulatrice de pression (76).
EP03009123A 2002-04-23 2003-04-22 Dispositif d'injection de carburant pour moteurs à combustion interne Expired - Lifetime EP1361359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10218023A DE10218023A1 (de) 2002-04-23 2002-04-23 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10218023 2002-04-23

Publications (2)

Publication Number Publication Date
EP1361359A1 EP1361359A1 (fr) 2003-11-12
EP1361359B1 true EP1361359B1 (fr) 2005-08-10

Family

ID=28798698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03009123A Expired - Lifetime EP1361359B1 (fr) 2002-04-23 2003-04-22 Dispositif d'injection de carburant pour moteurs à combustion interne

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EP (1) EP1361359B1 (fr)
DE (2) DE10218023A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005059830B3 (de) * 2005-12-14 2007-05-03 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
DE102006040248A1 (de) * 2006-08-28 2008-03-06 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine
DE102007039892A1 (de) * 2007-08-23 2009-02-26 Continental Automotive Gmbh Einspritzanlage für eine Brennkraftmaschine
EP2838698B2 (fr) 2012-07-10 2020-01-01 Siemens Aktiengesellschaft Agencement d'un robot et procédé de commande d'un robot
DE102021209819A1 (de) 2021-09-06 2023-03-09 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betrieb einer Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3235201B2 (ja) * 1992-08-26 2001-12-04 株式会社デンソー コモンレール圧検出装置
JPH09209870A (ja) * 1996-02-05 1997-08-12 Zexel Corp 蓄圧式燃料噴射装置
DE19927804A1 (de) * 1999-06-18 2000-12-28 Bosch Gmbh Robert Kraftstoffversorgungsanlage für eine Brennkraftmaschine
IT1320684B1 (it) * 2000-10-03 2003-12-10 Fiat Ricerche Dispositivo di controllo della portata di una pompa ad alta pressionein un impianto di iniezione a collettore comune del combustibile di un
JP2003021017A (ja) * 2001-07-10 2003-01-24 Bosch Automotive Systems Corp 蓄圧式燃料噴射装置

Also Published As

Publication number Publication date
DE10218023A1 (de) 2003-11-06
DE50300932D1 (de) 2005-09-15
EP1361359A1 (fr) 2003-11-12

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