EP2807366B1 - Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion - Google Patents

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

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Publication number
EP2807366B1
EP2807366B1 EP13714682.5A EP13714682A EP2807366B1 EP 2807366 B1 EP2807366 B1 EP 2807366B1 EP 13714682 A EP13714682 A EP 13714682A EP 2807366 B1 EP2807366 B1 EP 2807366B1
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EP
European Patent Office
Prior art keywords
pressure
bore
nozzle
fuel
pressure accumulator
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.)
Active
Application number
EP13714682.5A
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German (de)
English (en)
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EP2807366A1 (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
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Robert Bosch GmbH
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Publication date
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Publication of EP2807366A1 publication Critical patent/EP2807366A1/fr
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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
    • 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 having at least one injector, which includes a high-pressure accumulator integrated in the injector body, an injection nozzle comprising 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 structure, 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 is supplied from a high-pressure pump, wherein the supply takes place either via a high-pressure port of the injector at the top of the high-pressure accumulator (so-called top feed) or via a laterally contacting the injector lance (so-called Sidefeed).
  • top feed a high-pressure port of the injector at the top of the high-pressure accumulator
  • Sidefeed a laterally contacting the injector lance
  • Sidefeed the lance opens via a lance connection of the injector in an inlet bore, which opens into the high-pressure accumulator connecting the high-pressure reservoir with the nozzle antechamber high pressure bore.
  • 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 in the conventional design has the disadvantage that the high-pressure fuel flows directly from the lance connection to the injection nozzle during the injection, which leads to an 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 above-mentioned disadvantages, in particular to prevent the formation of deposits and residues in the high pressure accumulator of a modular common rail injector.
  • the invention provides, starting from a device of the type mentioned in essence, that the inlet bore is formed as a separate hole from the high pressure bore, which connects the lance connection with the high-pressure accumulator 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 end face of the storage tube forming the high-pressure accumulator.
  • pressure oscillations also lead to strong fluctuations in the injection rate in fast successive injection events. If, for example, a pressure oscillation at the nozzle seat is induced by a pre-injection, then with a constant opening time of the nozzle needle for the second, subsequent injection, the injected quantity depends on whether the second injection occurred earlier in a maximum or in a minimum of the pressure oscillation. The lowest possible pressure oscillation at the injection nozzle in all operating states of the hydraulic system is therefore desirable.
  • WO 2007/143768 A1 One way of reducing pressure pulsations is the WO 2007/143768 A1 can be seen, wherein a parallel to the high-pressure line between the injection nozzle and high-pressure accumulator switched resonator is provided, which has a high-pressure accumulator side Resonatordrossel.
  • the resonator throttle is preferably arranged at the inlet of the resonator line into the high-pressure accumulator.
  • the inventive design is particularly advantageous for injectors to bear, in which the nozzle needle for controlling its opening and closing movement of the prevailing in a fuel-pressurized control chamber pressure in the axial direction can be acted upon, wherein the control chamber with an inlet throttle having inlet channel and a flow channel having an outlet throttle 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 a cross section of an equipped with a high-pressure accumulator injector according to the prior art
  • Fig.2 a schematic representation of the inventive design of the injector.
  • an injector 1 having an injector 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 together.
  • 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 from the control chamber 11 via the outlet throttle 12 but is blocked at the valve seat of the solenoid valve 13.
  • a resonator is used. This consists of a resonator 20, which is the same length and the same Diameter as the high-pressure line 8, and a resonator 21, which is attached to the memory-side end of the resonator 20 and connects them to the memory 6.
  • the solenoid valve 13 When closing the solenoid valve 13, the pressure pulse generated at the nozzle seat 16 is propagated via the nozzle chamber 19 into the high-pressure line 8 and the resonator line 20.
  • the supply of high-pressure fuel to the high-pressure accumulator 6 takes place at the in Fig. 1 illustrated embodiment of the prior art from the side of the injector 1, via a sidefeed 24.
  • the Sidefeed 24 includes a laterally screwed into the injector 1 lance or a lance connector 25 (only in Fig. 2 shown).
  • 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 the in Fig.1 Functional components described in more detail, namely the memory 6, the holding body 5, the valve plate 4, the throttle plate 3 and the injection nozzle 2 are only outlined without their individual components, as they are based on the Fig. 1 described individually.
  • 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. This leads to the fact that with each injection the entire injection quantity is taken from the high-pressure accumulator 6, so that over the running time there is sufficient circulation of the accumulator contents.

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)

Claims (3)

  1. Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne comprenant au moins un injecteur (1) qui comprend un accumulateur haute pression (6) intégré dans le corps d'injecteur, une buse d'injection (2) qui comprend un pointeau de buse (15) guidé de manière déplaçable axialement, qui est entourée par un espace de buse (19), un alésage haute pression (8) reliant l'accumulateur haute pression (6) et l'espace de buse (19) et un alésage d'alimentation (22) pour acheminer du carburant haute pression à l'accumulateur haute pression (6), l'alésage d'alimentation (22) présentant un raccord de lance (25) disposé latéralement au niveau du corps d'injecteur, caractérisé en ce que l'alésage d'alimentation (22) est réalisé sous forme d'alésage séparé de l'alésage haute pression (8), qui relie le raccord de lance (25) directement à l'accumulateur haute pression (6), le raccord de lance (25) étant réalisé au niveau d'un corps de retenue (5) qui est connecté, notamment vissé, du côté frontal au tube d'accumulateur formant l'accumulateur haute pression (6).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'un alésage de résonateur (20) monté parallèlement à l'alésage haute pression (8) est prévu, lequel est en liaison avec la buse d'injection (2) et débouche dans l'accumulateur haute pression (6) par le biais d'un étranglement de résonateur (21).
  3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le pointeau de buse (15), pour la commande de son mouvement d'ouverture et de fermeture, peut être sollicité dans la direction axiale par la pression régnant dans un espace de commande (11) pouvant être alimenté par du carburant sous pression, l'espace de commande (11) étant en liaison avec un canal d'alimentation (9) présentant un étranglement d'alimentation (10) et un canal de sortie présentant un étranglement de sortie (12), et au moins une soupape de commande (13) ouvrant ou fermant le canal d'alimentation ou de sortie étant prévue, avec laquelle la pression dans l'espace de commande (11) peut être commandée.
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 EP2807366A1 (fr) 2014-12-03
EP2807366B1 true 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
EP1612405B1 (fr) * 2004-06-30 2008-11-05 C.R.F. Società Consortile per Azioni Système d'injection de carburant pour moteur à combustion interne
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

Also Published As

Publication number Publication date
WO2013111008A1 (fr) 2013-08-01
KR20140108581A (ko) 2014-09-11
AT512437B1 (de) 2014-03-15
US20140345569A1 (en) 2014-11-27
AT512437A1 (de) 2013-08-15
EP2807366A1 (fr) 2014-12-03
US10371111B2 (en) 2019-08-06
KR102009766B1 (ko) 2019-08-12

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