EP1864014B1 - Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine - Google Patents

Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine Download PDF

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Publication number
EP1864014B1
EP1864014B1 EP06701161A EP06701161A EP1864014B1 EP 1864014 B1 EP1864014 B1 EP 1864014B1 EP 06701161 A EP06701161 A EP 06701161A EP 06701161 A EP06701161 A EP 06701161A EP 1864014 B1 EP1864014 B1 EP 1864014B1
Authority
EP
European Patent Office
Prior art keywords
injector
pressure
pressure pump
fuel injection
injection device
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
EP06701161A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1864014A1 (de
Inventor
Thomas Pauer
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 EP1864014A1 publication Critical patent/EP1864014A1/de
Application granted granted Critical
Publication of EP1864014B1 publication Critical patent/EP1864014B1/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
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention relates to a fuel injection device for a multi-cylinder internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is characterized by the US-A-2004/0 187 848 known.
  • This fuel injection device has a high-pressure pump and in each case an injector for each cylinder of the internal combustion engine.
  • the injector is connected at least indirectly via a hydraulic line to the high-pressure pump.
  • the injectors are connected in series via the hydraulic lines, with only a first one of the injectors being directly connected to the high pressure pump.
  • a disadvantage of this known fuel injector that the pressure supply of the injectors connected in series may not be sufficiently ensured.
  • the fuel injection device according to the invention with the features of claim 1 has the advantage that the adequate pressure supply of all injectors is ensured by the direct connection of both the first injector and the last injector with the high-pressure pump.
  • FIG. 1 a fuel injection device for an internal combustion engine in a simplified representation
  • FIG. 2 an injector of the fuel injection device in an enlarged view
  • FIGS. 3 and 4 the fuel injection device according to two embodiments.
  • a fuel injection device for a multi-cylinder internal combustion engine which is preferably a self-igniting internal combustion engine of a motor vehicle.
  • the fuel injection device has a high-pressure pump 10 through which fuel is conveyed under high pressure.
  • an injector 12 is arranged, can be injected through the fuel into the combustion chamber of the cylinder.
  • FIGS. 1 to 4 only a few of the injectors 12 are shown, with further injectors are indicated by dots to the last injector 12d.
  • the injector 12 has as in FIG. 2 1, a fuel injection valve 14, through which fuel is injected into the combustion chamber of the cylinder, and an electrically actuated actuator 16.
  • the actuator 16 By the actuator 16, the opening and closing movement of an injection valve member 15 of the fuel injection valve 14 is controlled.
  • the actuator 16 is preferably a piezoelectric actuator that changes its size depending on an electrical voltage applied thereto. By this size change, a switching function can be achieved by means of which the injection valve member 15 can be opened or closed.
  • the actuator 16 is driven by an electronic control device 18.
  • the actuator 16 is arranged in a fuel-filled space 20 in a housing 22 of the injector 12.
  • the actuator 16 can act, for example, on a piston 17, by which a control chamber 19 is limited, wherein the injection valve member 15 is acted upon by the pressure prevailing in the control chamber 19 in the closing direction.
  • the piston 17 is held by a prestressed spring 21 in contact with the actuator 16.
  • the injection valve member 15 is also acted upon by a prestressed spring 23 in the closing direction.
  • a prestressed spring 23 When an electrical voltage is applied to the actuator 16 by the control device 18, it expands and pushes the piston 17 into the control chamber 19, in which there is thus a high pressure, by which the injection valve member 15 is held in its closed position that no fuel injection takes place. If no voltage is applied to the actuator 16 by the control device 18, this reduces its expansion, so that the piston 17 is moved out of the control chamber 19 by the spring 21, whereby the pressure in the control chamber 19 decreases. The injection valve member 15 then becomes moved by acting on this in the opening direction high pressure against the prevailing in the control chamber 19 low pressure and against the force of the spring 23 in its open position, so that fuel is injected.
  • two high-pressure ports 24 are provided, is supplied via the high-pressure fuel to the injector 12 and is continued by this.
  • the high-pressure ports 24 are connected to the space 20 in which the actuator 16 is arranged.
  • the high-pressure ports 24 are connected to the fuel injection valve 14 through the space 20 to supply fuel necessary for fuel injection.
  • the space 20 forms a high-pressure accumulator, from which the fuel is taken for injection.
  • the space 20 has a sufficiently large volume in order to be able to store the fuel volume required for the fuel injection.
  • the volume of the space 20 may be between 1 and 5 cm 3 , for example about 2 cm 3 .
  • a first injector 12a of the injectors 12 connected to the high-pressure pump 10 wherein a laxative from the high-pressure outlet 10 high-pressure pump hydraulic line 26 is connected to a high pressure port 24 of the injector 12a.
  • the first injector 12a connected to the high-pressure pump 10 is the injector of the internal combustion engine that is closest to the high-pressure pump 10.
  • the cylinders of the internal combustion engine and thus also the associated injectors 12 are arranged in series.
  • a hydraulic line 27 is connected, which leads to another injector 12 b and with a high pressure port 24 of this injector 12b is connected.
  • the injector 12b is disposed adjacent to the first injector 12a.
  • a hydraulic line 27 which in turn leads to another, preferably adjacently disposed, injector 12 and is connected to a high-pressure connection 24 of this injector 12.
  • the last injector 12d is connected to the preceding adjacent injector only via a hydraulic line 27 connected to one of its two high-pressure ports 24, while a pressure sensor 28 is arranged at its other high-pressure port 24.
  • the pressure sensor 28 can also be arranged on another injector 12, in one of the hydraulic lines 27 between the injectors 12, in the hydraulic line 26 between the high-pressure pump 10 and the first injector 12a or on the high-pressure pump 10.
  • the injectors 12 of the cylinders of the internal combustion engine are hydraulically connected in series, with only the first injector 12a is connected directly to the high-pressure pump 10.
  • the pressure sensor 28 is connected to the electrical control device 18 and provides it with a signal for the pressure actually prevailing in the injectors 12.
  • a fuel metering device 30 is arranged, through which the sucked by the high-pressure pump 10 and funded under high pressure fuel quantity can be changed.
  • a variable flow cross-section on the suction side of the high-pressure pump 10 can be set by the fuel metering device 30.
  • the suction side of the high-pressure pump 10 fuel is supplied from a reservoir 32 by means of a feed pump 34, wherein the fuel metering device 30 between the feed pump 34th and the high-pressure pump 10 is arranged.
  • the fuel metering device 30 is controlled such that the high-pressure pump 10 delivers a quantity of fuel under high pressure to the injectors 12, as required to maintain a predetermined pressure in the injectors 12 for the fuel injection.
  • the high-pressure pump 10 has only a single pump element, wherein the first injector 12a leading hydraulic line 26 is connected to the outlet of this pump element.
  • the high-pressure pump 10 has a plurality of pump elements, for example two or three pump elements, wherein the outlets of the pump elements are brought together to form a common connection to the high-pressure pump 10, to which the hydraulic line 26 leading to the first injector 12a is connected.
  • FIG. 3 the fuel injection device is shown according to a first embodiment, in which the basic structure is the same as in the embodiment according to FIG. 1 , Deviating from the embodiment according to FIG. 1
  • the last injector 12d is connected via a hydraulic line 26 directly to the high-pressure pump 10.
  • the last injector 12d is also as in the embodiment according to FIG. 1 connected to the adjacent injector via a hydraulic line 27.
  • Two high-pressure outlets are provided on the high-pressure pump 10, one of which is connected to the first injector 12a and the other to the last injector 12d.
  • the pressure sensor 28 may be disposed on one of the injectors 12, in a hydraulic line 27 between the injectors 12 or in a hydraulic line 26 between the high pressure pump 10 and one of the injectors 12 or on the high pressure pump 10. If the High-pressure pump 10 has only one pump element, it must be provided on this two high-pressure connections for connecting the two leading to the injectors 12a and 12d hydraulic lines 26. If the high-pressure pump 10 has two pump elements, the hydraulic line 26 to the first injector 12a at the outlet the one pump element is connected and the hydraulic line 26 to the last injector 12d is connected to the outlet of the other pump element. When the high-pressure pump 10 has more than two pump elements, their outlets are combined to form two high-pressure ports on the high-pressure pump 10, with a hydraulic line 26 leading to an injector 12a or 12d being connected to each high-pressure port.
  • each of the high-pressure pump 10 next arranged injector 12a, 12d of each cylinder row is connected via a respective hydraulic line 26 to the high-pressure pump 10.
  • the remaining injectors 12 are each connected in series by the hydraulic lines 27.
  • the construction of the high pressure pump 10 is as described in the second embodiment.
  • a pressure control valve 36 may be provided in the fuel injection device by the pressure prevailing in the injectors 12 pressure can be changed.
  • the pressure regulating valve 36 may be arranged, for example, on the high-pressure pump 10.
  • the pressure regulating valve 36 may also be arranged on the last injector 12d.
  • the pressure regulating valve 36 and the pressure sensor 28 may also be arranged at any other location.
  • the pressure regulating valve 36 is connected to the control device 18 and is controlled by the latter in order to set the pressure prevailing in the injectors 12 to a predetermined value.
  • the pressure control valve 36 is actuated by the control device 18, a very rapid change of the pressure prevailing in the injectors 12 can be achieved.
  • the high pressure pump 10 at least substantially only the fuel quantity required for fuel injection below High pressure is delivered to the injectors 12, whereby the drive power for the high-pressure pump 10 can be kept low.
EP06701161A 2005-03-21 2006-01-25 Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine Not-in-force EP1864014B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005012928A DE102005012928A1 (de) 2005-03-21 2005-03-21 Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine
PCT/EP2006/050448 WO2006100142A1 (de) 2005-03-21 2006-01-25 Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1864014A1 EP1864014A1 (de) 2007-12-12
EP1864014B1 true EP1864014B1 (de) 2009-11-11

Family

ID=35871222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06701161A Not-in-force EP1864014B1 (de) 2005-03-21 2006-01-25 Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine

Country Status (8)

Country Link
US (1) US7588016B2 (zh)
EP (1) EP1864014B1 (zh)
JP (1) JP4651057B2 (zh)
KR (1) KR101092767B1 (zh)
CN (1) CN101163879B (zh)
AT (1) ATE448402T1 (zh)
DE (2) DE102005012928A1 (zh)
WO (1) WO2006100142A1 (zh)

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DE102007039893B4 (de) * 2007-08-23 2013-05-08 Continental Automotive Gmbh Einspritzanlage für eine Brennkraftmaschine
US8336524B2 (en) 2007-09-13 2012-12-25 Ganser-Hydromag Ag Fuel injection device
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GB2491147B (en) * 2011-05-24 2017-07-05 Gm Global Tech Operations Llc Fuel injection system comprising fuel injectors linked in series
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JP6091920B2 (ja) 2013-02-14 2017-03-08 ヤンマー株式会社 燃料高圧管及びその接続方法
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GB201320374D0 (en) * 2013-07-05 2014-01-01 Delphi Tech Holding Sarl Distributed fuel injection equipment
GB201317451D0 (en) * 2013-10-02 2013-11-13 Delphi Tech Holding Sarl Fuel Injection Equipment
EP3076003A3 (en) * 2015-04-02 2017-03-01 Robert Bosch GmbH A fuel injector and a fuel injection system
DE102015217645A1 (de) * 2015-09-15 2017-03-16 Robert Bosch Gmbh Verfahren zum Betreiben einer Einspritzanlage
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JP6569611B2 (ja) * 2016-07-07 2019-09-04 株式会社デンソー 特性検出装置、および、それを用いた制御装置

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Also Published As

Publication number Publication date
CN101163879B (zh) 2011-03-23
US7588016B2 (en) 2009-09-15
ATE448402T1 (de) 2009-11-15
WO2006100142A1 (de) 2006-09-28
CN101163879A (zh) 2008-04-16
US20080184962A1 (en) 2008-08-07
JP4651057B2 (ja) 2011-03-16
KR20070110377A (ko) 2007-11-16
EP1864014A1 (de) 2007-12-12
DE102005012928A1 (de) 2006-09-28
DE502006005338D1 (de) 2009-12-24
KR101092767B1 (ko) 2011-12-09
JP2008533387A (ja) 2008-08-21

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