EP2807366A1 - Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne - Google Patents

Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne

Info

Publication number
EP2807366A1
EP2807366A1 EP13714682.5A EP13714682A EP2807366A1 EP 2807366 A1 EP2807366 A1 EP 2807366A1 EP 13714682 A EP13714682 A EP 13714682A EP 2807366 A1 EP2807366 A1 EP 2807366A1
Authority
EP
European Patent Office
Prior art keywords
pressure
bore
nozzle
pressure accumulator
fuel
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
EP13714682.5A
Other languages
German (de)
English (en)
Other versions
EP2807366B1 (fr
Inventor
Johannes Schnedt
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 EP2807366A1 publication Critical patent/EP2807366A1/fr
Application granted granted Critical
Publication of EP2807366B1 publication Critical patent/EP2807366B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/02—Feature extraction for speech recognition; Selection of recognition unit
    • G10L2015/025—Phonemes, fenemes or fenones being the recognition units
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L2019/0001—Codebooks
    • G10L2019/0004—Design or structure of the codebook
    • G10L2019/0005—Multi-stage vector quantisation

Definitions

  • the invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine with at least one injector having a high-pressure accumulator integrated in the injector body, an injection nozzle which comprises an axially displaceable nozzle needle which is surrounded by a nozzle chamber, a high-pressure accumulator and the nozzle chamber connecting high-pressure bore and an inlet bore in order to supply the high-pressure accumulator high-pressure fuel, wherein the inlet bore has a laterally arranged on the injector body lance connection.
  • Injection injectors of this type are used in modular common rail systems, which are characterized in that a part of the existing storage volume in the system is present in the injector itself.
  • Modular common-rail systems are used in particularly large engines, in which the individual injectors may be mounted at a considerable distance from each other.
  • the sole use of a common rail for all injectors is not useful in such engines, as it would come to a massive slump in injection pressure due to the long lines during injection, so with prolonged injection duration, the injection rate would noticeably break.
  • it is therefore intended to arrange a high-pressure accumulator inside each injector.
  • Such a design is referred to as a modular design, since each injector has its own high-pressure accumulator and thus can be used as a stand-alone module.
  • a high-pressure accumulator is not a common line to understand, but it is a pressure-resistant vessel with an inlet and outlet, whose Diameter is significantly increased compared to the high pressure lines, so that from the high-pressure accumulator a certain amount of injection can be delivered without causing an immediate pressure drop.
  • High pressure fuel from a high pressure pump is supplied, wherein the supply either via a high pressure port of the injector at the top of the high pressure accumulator (so-called topfeed) or via a laterally contacting the injector lance (so-called Sidefeed).
  • topfeed a high pressure port of the injector at the top of the high pressure accumulator
  • Sidefeed a laterally contacting the injector lance
  • the Sidefeed has a number of advantages, especially in large-scale engines, since it allows the leadership of the fuel flow to the injector across the cylinder, whereby the length of the feed can be shortened compared to a pot feed in the rule.
  • the Sidefeed has the disadvantage that the high-pressure fuel flows directly from the lance connection to the injection nozzle during injection, resulting in insufficient replacement of the fuel in the high-pressure accumulator. Replacing the fuel is important, however, so that it does not lead to deposits or the emergence of residues. The risk of deposits or residues exists especially when using high-viscosity fuels, such as heavy oil in large diesel engines.
  • Another disadvantage of the above-described type Sidefeed is that the mouth of the inlet hole in the high-pressure bore, which is usually carried out in the form of a T-connection, is unfavorable strength. The invention therefore aims to avoid the disadvantages mentioned above, in particular to prevent the formation of deposits and residues in the high-pressure accumulator of a modular common rail In ector.
  • the invention provides, starting from a device of the type mentioned above, essentially that the inlet bore is formed as a separate hole from the high pressure bore, which connects the lance connection with the Ho.chtik appointed directly. This ensures that the entire amount of fuel supplied to the injector is passed through the high-pressure accumulator, so that a sufficient replacement of the fuel in the high-pressure accumulator can take place.
  • This fuel guide also promotes the creation of turbulence, resulting in a better ventilation of the high-pressure accumulator.
  • a particularly preferred construction provides that the lance connection is formed on a holding body which is connected, in particular screwed, to the front side of the storage tube forming the high-pressure accumulator.
  • a possibility of reducing pressure pulsations can be taken from WO 2007/143768 A1, wherein a parallel to the high-pressure line between the injection nozzle and high-pressure accumulator switched resonator is provided, the weapon founded towelsseit ig has a resonator.
  • the resonator tube is preferably arranged at the inlet of the resonator line into the high-pressure accumulator.
  • the known from WO 2007/143768 AI training thus provides that the high-pressure line is divided into two independent areas, one of which is equipped with a throttle, so that the pressure oscillations that arise at the nozzle seat are reflected differently in both areas and the reflected vibrations almost cancel each other due to their phase shift.
  • the design according to the invention is particularly advantageous for injectors, in which the nozzle needle can be acted upon in the axial direction by the pressure prevailing in a control chamber which can be supplied with fuel under pressure, the control chamber being provided with an inlet throttle Inlet channel and an outlet throttle having flow channel is in communication and at least one inlet or outlet channel opening or closing control valve is provided with which the pressure in the control chamber is controllable.
  • FIG. 1 schematically shows a cross section of an injector equipped with a high-pressure accumulator according to the prior art
  • FIG. 2 shows a schematic representation of the embodiment of the injector according to the invention.
  • an injector 1 is shown, which has a Einspritzdü ⁇ se 2, a throttle plate 3, a valve plate 4, a holding body 5 and a high-pressure accumulator 6, wherein a screwed to the holding body 5 nozzle retaining nut 7, the injection nozzle 2, the throttle plate 3 and the valve plate 4 holds together.
  • the solenoid valve 13 In the idle state, the solenoid valve 13 is closed, so that the high pressure fuel from the high pressure accumulator 6 via the high pressure line 8, the cross connection 9 and the inlet throttle 10 flows into the control chamber 11 of the injection nozzle 2, the Outflow. the control chamber 11 via the outlet throttle 12 but is blocked at the valve seat of the solenoid valve 13.
  • the voltage applied in the control chamber 11 system pressure presses together with the force of the nozzle spring 14, the nozzle needle 15 in the Düsennadelsit z 16, so that the injection holes 17 are closed.
  • solenoid valve 13 If the solenoid valve 13 is actuated, it releases the flow through the solenoid valve seat, and fuel flows from the control chamber 11 through the outlet throttle 12, the solenoid valve armature chamber and the low-pressure bore 18 back into the fuel tank, not shown.
  • a equilibrium pressure defined in the control chamber 11 by the flow cross-sections of inlet throttle 10 and outlet throttle 12 is so small that the system pressure applied in the nozzle chamber 19 is able to open the nozzle needle 15, which is displaceable longitudinally in the nozzle body, so that the spray holes 17 are released and an injection takes place.
  • a resonator is used. This consists of a Re ⁇ sonatortechnisch 20, which the same length and the same Has diameter as the high pressure line 8, and a resonator 21, which is mounted on the memory side end of the resonator 20 and this connects to the memory 6.
  • the supply of high-pressure fuel to the high-pressure accumulator 6 takes place in the embodiment according to the prior art shown in Fig. 1 from the side of the injector 1, via a Sidefeed 24.
  • the Sidefeed 24 includes a laterally screwed into the injector 1 or a lance Lance connector 25 (shown only in Fig. 2).
  • the inlet bore. is designated 22 and opens at 23 in the high-pressure bore 8.
  • FIG. 2 shows a highly schematic representation of the injector 1, wherein thejanskompo- described in more detail in Fig.l components, namely, the memory 6, the retaining body 5, the valve ⁇ plate 4, the orifice plate 3 and the injection nozzle 2 torn only environmentally are, without their individual components, as described with reference to FIG. 1, individually represent.
  • FIG. 2 shows the construction according to the invention, in which the inlet bore 22 connects the lance connection 25 directly to the high-pressure accumulator 6. As a result, the entire injection quantity is taken from the high-pressure accumulator 6 during each injection, so that sufficient circulation of the accumulator contents occurs over the course of the runtime.

Landscapes

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

Abstract

L'invention concerne un dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne, comprenant au moins un injecteur (1) qui présente un accumulateur haute pression (6) intégré au corps d'injecteur, une buse d'injection (2) comportant une aiguille d'injection (15) qui est guidée en coulissement axial et qui est entourée d'une chambre (19) de buse d'injection, un orifice haute pression (8) reliant l'accumulateur haute pression (6) et la chambre (19) de buse d'injection, et un orifice d'alimentation (22) assurant l'alimentation de l'accumulateur haute pression (6) en carburant sous haute pression, l'orifice d'alimentation (22) présentant un raccord pour lancette (25) disposé sur le côté du corps d'injecteur. L'orifice d'alimentation (22) est conçu comme un orifice qui est distinct de l'orifice haute pression (8) et qui assure la liaison directe du raccord pour lancette (25) avec l'accumulateur haute pression (6).
EP13714682.5A 2012-01-26 2013-01-17 Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion Active EP2807366B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA105/2012A AT512437B1 (de) 2012-01-26 2012-01-26 Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
PCT/IB2013/000212 WO2013111008A1 (fr) 2012-01-26 2013-01-17 Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2807366A1 true EP2807366A1 (fr) 2014-12-03
EP2807366B1 EP2807366B1 (fr) 2016-01-13

Family

ID=48050059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13714682.5A Active EP2807366B1 (fr) 2012-01-26 2013-01-17 Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion

Country Status (5)

Country Link
US (1) US10371111B2 (fr)
EP (1) EP2807366B1 (fr)
KR (1) KR102009766B1 (fr)
AT (1) AT512437B1 (fr)
WO (1) WO2013111008A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013013234A1 (de) * 2013-08-08 2015-02-12 Man Diesel & Turbo Se Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage
CN114151251B (zh) * 2021-11-19 2023-10-13 哈尔滨工程大学 液氨-柴油双燃料一体化喷射器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187733A (en) * 1963-08-23 1965-06-08 Int Harvester Co Fuel injection system for internal combustion engines
DE3119050A1 (de) * 1981-05-05 1982-11-18 Gebrüder Sulzer AG, 8401 Winterthur "brennstoffeinspritzvorrichtung mit elektromagnetisch betaetigtem umschaltventil"
DE3505229A1 (de) * 1985-02-05 1986-08-07 Gebrüder Sulzer AG, Winterthur Vorrichtung zum einspritzen von in einer fluessigkeit aufgeschwemmten, feinteiligem, festem brennstoff in den brennraum einer hubkolbenbrennkraftmaschine
US5012786A (en) * 1990-03-08 1991-05-07 Voss James R Diesel engine fuel injection system
JP2000205081A (ja) * 1999-01-06 2000-07-25 Usui Internatl Ind Co Ltd ディ―ゼル内燃機関の蓄圧式燃料噴射システム
DE10136157A1 (de) * 2001-05-04 2002-08-29 Mtu Friedrichshafen Gmbh Kraftstoffinjektor
DE10210282A1 (de) * 2002-03-08 2003-09-25 Bosch Gmbh Robert Vorrichtung zum Einspritzen von Kraftstoff an stationären Verbrennungskraftmaschinen
DE602004017593D1 (de) * 2004-06-30 2008-12-18 Fiat Ricerche Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
ATE488690T1 (de) * 2005-07-18 2010-12-15 Ganser Hydromag Speichereinspritzsystem für brennkraftmaschine
DE102006027614B4 (de) * 2006-06-13 2009-02-05 L'orange Gmbh Einspritzinjektor für Brennkraftmaschinen
AT503660B1 (de) 2006-06-13 2007-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
AT509405A1 (de) * 2010-01-19 2011-08-15 Bosch Gmbh Robert Verfahren zum temperieren eines injektors einer einspritzung für das einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
AT509877B1 (de) * 2010-11-02 2011-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013111008A1 *

Also Published As

Publication number Publication date
EP2807366B1 (fr) 2016-01-13
KR102009766B1 (ko) 2019-08-12
AT512437A1 (de) 2013-08-15
US10371111B2 (en) 2019-08-06
AT512437B1 (de) 2014-03-15
US20140345569A1 (en) 2014-11-27
KR20140108581A (ko) 2014-09-11
WO2013111008A1 (fr) 2013-08-01

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