EP2857672A1 - Kraftstoffeinspritzvorrichtung - Google Patents

Kraftstoffeinspritzvorrichtung Download PDF

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Publication number
EP2857672A1
EP2857672A1 EP14186943.8A EP14186943A EP2857672A1 EP 2857672 A1 EP2857672 A1 EP 2857672A1 EP 14186943 A EP14186943 A EP 14186943A EP 2857672 A1 EP2857672 A1 EP 2857672A1
Authority
EP
European Patent Office
Prior art keywords
fie
fuel
distributor
injector
high pressure
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.)
Withdrawn
Application number
EP14186943.8A
Other languages
English (en)
French (fr)
Inventor
Rodolphe DRATCH
Laurent Doradoux
Jean Luc Beduneau
Philippe Legrand
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
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 Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Publication of EP2857672A1 publication Critical patent/EP2857672A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F02M63/0275—Arrangement of common rails
    • F02M63/0285—Arrangement of common rails having more than one common rail
    • F02M63/029—Arrangement of common rails having more than one common rail per cylinder bank, e.g. storing different fuels or fuels at different pressure levels per cylinder bank
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M63/0275—Arrangement of common rails
    • F02M63/0285—Arrangement of common rails having more than one common rail
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator

Definitions

  • the present invention relates to high pressure fuel injection equipment for internal combustion engine.
  • FIE fuel injection equipment
  • a common rail system after the occurrence of an injection event the fuel sprayed in the combustion chamber of an internal combustion engine is replaced by high pressure fuel contained in the FIE, per se, in the common rail, in the pipes connecting the common rail to each injector and in the injector itself.
  • Each injection event generates hydraulic waves that propagate inside the high pressure fuel contained in the FIE. It may happen that engines having closely spaced injection events, such as engines having multiple injection within each cycle, that the fuel injected during an event is not entirely replaced inside the injector when occurs the subsequent event. The fuel, even at high pressure does not have the time to flow to the tip of the nozzle. To overcome this issue, the Applicant has disclosed, in todays filed application GB1317441.2 , fuel injectors having a largely increased internal volume occupied by the high pressure fuel. Furthermore said volume is concentrated in the vicinity of the spray holes so, after an injection event, the fuel sprayed is immediately replaced.
  • FIE fuel injector equipment
  • the FIE comprising a high pressure fuel pump, a plurality of interconnecting pipes, a plurality of injectors and a pressure sensor; all being in fluid connection in series so that they form an open chain.
  • all the injectors are fluidly connected in series, a high pressure pump delivering fuel to the first injector of the series and a high pressure sensor monitoring the fuel pressure in the vicinity of the last injector of the series.
  • all the injectors are fluidly connected in parallel to a high pressure fuel distributor receiving fuel from a high pressure pump.
  • the FIE can further comprise a pressure sensor monitoring the pressure inside the distributor and, eventually a valve controlling the pressure in the distributor.
  • the valve enables some fuel to exit the distributor when the pressure exceeds a threshold.
  • the FIE comprises at least another distributor each injector being directly connected to one of the distributors.
  • the high pressure pump of the FIE delivers fuel to a first distributor, said another distributor being fluidly connected to the first distributor. Therefore, the pump and the distributors are arranged in series on an inlet line.
  • the FIE further comprises a pressure sensor monitoring the pressure inside said another distributor, so the pressure sensor is arrange by the end of the inlet line.
  • the FIE may comprise a damping mean for damping hydraulic waves propagating in the high pressure fuel.
  • the damping mean is arranged in preferably the vicinity of the injector. Should the FIE comprises a plurality of injectors a damping mean is being arranged in the vicinity of each injector.
  • the damping mean is arranged upstream the injector, preferably in the vicinity of the distributor. Should the FIE comprises a plurality of injectors a damping mean is being arranged upstream each injector, preferably in the vicinity of the distributor.
  • the damping mean is arranged in the vicinity of an injector or of a distributor, for instance on the connecting pipes upstream the injector.
  • the damping mean can be a restriction.
  • the FIE has four injectors 12 even though the teachings of the invention are directly applicable to any FIE having another number of injectors 12.
  • Figure 1 represents a first embodiment the FIE 10 which constituents are in fluid connection in series forming an open chain comprising a high pressure fuel pump 14 supplying fuel via interconnecting pipes 16 to the first injector, then from said first to the second injector, then from the second to the third injector, then from the third to the fourth injector.
  • a pressure sensor 26 is arranged at the end of the chain.
  • the high pressure fuel contained in the injectors 12 is at least 35%, and preferably over 45% of the total quantity of high pressure fuel contained in the FIE 10. To achieve such ratio the injectors are of the type having an internal buffer volume holding high pressure fuel.
  • the FIE 10 is provided with restrictions 20 that act as fluid dampers.
  • the restrictions 20 are arranged just upstream each injector 12.
  • the pump flows the fuel in a continuous line wherein are arranged T-type connections, each T connecting to an injector.
  • the preferred location for the damper 20 is between the injector and the T.
  • the restriction can also be arranged inside the injector as this is detailed in the application GB1317441.2 .
  • Figure 2 represents a second embodiment of the FIE 10 which further comprises a high pressure fuel distributor 28 that is directly connected, on one side, downstream the high pressure pump 14 for receiving the fuel and, on the other side, upstream the injectors 12, for distributing said fuel in parallel.
  • the pressure inside the distributor 28 is monitored by the pressure sensor 26 and, a pressure relief valve 18 is arranged so to enable fuel to exit the FIE 10 in case of a fuel pressure rising over a predetermined threshold.
  • restrictions 20 can be arranged between the restrictions 20 ant the injectors.
  • the restrictions 20 are arranged in the vicinity of the distributor 28.
  • another restriction, not represented can be added on the line from the pump to the distributor.
  • the pump 14 flows high pressure fuel to the distributor 28.
  • an injector 12 proceeds to an injection and sprays fuel in a combustion chamber, said injector 12 fills up again by receiving fuel flowing from the distributor 28.
  • the sensor 26 then observes a pressure decrease in the distributor 28 that is compensated by new fuel pressurized by the pump 14.
  • Figure 3 is a third embodiment which indeed is an alternative to the second embodiment.
  • the second FIE fits an engine having in-line cylinders
  • the third FIE would fit a V-type engine.
  • the third FIE comprises an inlet line 30 fluidly connecting in series the pump 14 and two distributors 28, 32, arranged one downstream the other on the inlet line 30.
  • the injectors 12 are divided in two groups, the injectors 12 of one group being all directly connected to one distributor 28, 32.
  • the pressure sensor 26 is arranged at the end of the inlet line that is distant from the pump 14.
  • restrictions 20 can also be arranged between the restrictions 20 ant the injectors.
  • the restrictions 20 are arranged in the vicinity of the distributor 28. Another restriction can be added on the line from the pump to the first distributor 28.
  • the operation of the third FIE is similar to the operation of the second FIE, the fuel injecting during an injection event and missing in an injector 12 being replaced by fuel contained in the distributor to which said injector is connected.
  • FIE architecture not represented, can easily be organized.
  • the pump 14 can deliver fuel to two distributors connected in parallel, rather than in series as in the third FIE.
  • the number of injector is not limited to four as well as the number of distributor is not limited to two. Alternatives with more than two distributors can be arranged in following the teachings, for instance, of the third embodiment.
  • the ratio previously presented (35% preferred to 45%) is respected with injectors each holding from 1 cm 3 to 2 cm 3 consequently, the volume contained by the single or two distributors is reduced relative to a well-known common rail.

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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)
EP14186943.8A 2013-10-02 2014-09-30 Kraftstoffeinspritzvorrichtung Withdrawn EP2857672A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1317451.1A GB201317451D0 (en) 2013-10-02 2013-10-02 Fuel Injection Equipment

Publications (1)

Publication Number Publication Date
EP2857672A1 true EP2857672A1 (de) 2015-04-08

Family

ID=49585188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14186943.8A Withdrawn EP2857672A1 (de) 2013-10-02 2014-09-30 Kraftstoffeinspritzvorrichtung

Country Status (2)

Country Link
EP (1) EP2857672A1 (de)
GB (1) GB201317451D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3076003A3 (de) * 2015-04-02 2017-03-01 Robert Bosch GmbH Kraftstoffeinspritzer und kraftstoffeinspritzsystem
DE102017203695B4 (de) 2016-03-23 2023-05-17 Toyota Jidosha Kabushiki Kaisha Kraftstoffeinspritzungsvorrichtung für einen Verbrennungsmotor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612405A1 (de) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
WO2006100142A1 (de) * 2005-03-21 2006-09-28 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine
WO2007009279A1 (de) * 2005-07-18 2007-01-25 Ganser-Hydromag Ag Speichereinspritzsystem für brennkraftmaschine
DE102006040248A1 (de) * 2006-08-28 2008-03-06 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine
DE102009055129A1 (de) * 2009-12-22 2011-06-30 Robert Bosch GmbH, 70469 Brennstoffeinspritzeinrichtung
WO2012107634A2 (en) * 2011-02-09 2012-08-16 Wärtsilä Finland Oy Pipe connector and fuel injection system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612405A1 (de) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
WO2006100142A1 (de) * 2005-03-21 2006-09-28 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine
WO2007009279A1 (de) * 2005-07-18 2007-01-25 Ganser-Hydromag Ag Speichereinspritzsystem für brennkraftmaschine
DE102006040248A1 (de) * 2006-08-28 2008-03-06 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine
DE102009055129A1 (de) * 2009-12-22 2011-06-30 Robert Bosch GmbH, 70469 Brennstoffeinspritzeinrichtung
WO2012107634A2 (en) * 2011-02-09 2012-08-16 Wärtsilä Finland Oy Pipe connector and fuel injection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3076003A3 (de) * 2015-04-02 2017-03-01 Robert Bosch GmbH Kraftstoffeinspritzer und kraftstoffeinspritzsystem
DE102017203695B4 (de) 2016-03-23 2023-05-17 Toyota Jidosha Kabushiki Kaisha Kraftstoffeinspritzungsvorrichtung für einen Verbrennungsmotor

Also Published As

Publication number Publication date
GB201317451D0 (en) 2013-11-13

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