EP2635794B1 - Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne - Google Patents

Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne Download PDF

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Publication number
EP2635794B1
EP2635794B1 EP20110785565 EP11785565A EP2635794B1 EP 2635794 B1 EP2635794 B1 EP 2635794B1 EP 20110785565 EP20110785565 EP 20110785565 EP 11785565 A EP11785565 A EP 11785565A EP 2635794 B1 EP2635794 B1 EP 2635794B1
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EP
European Patent Office
Prior art keywords
pressure
holding body
resonator
line
accumulator
Prior art date
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Active
Application number
EP20110785565
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German (de)
English (en)
Other versions
EP2635794A1 (fr
Inventor
Christian Graspeuntner
Gerhard Unterberger
Franz Guggenbichler
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2635794A1 publication Critical patent/EP2635794A1/fr
Application granted granted Critical
Publication of EP2635794B1 publication Critical patent/EP2635794B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B17/00—Engines characterised by means for effecting stratification of charge in cylinders
    • F02B17/005—Engines characterised by means for effecting stratification of charge in cylinders having direct injection in the combustion chamber
    • 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
    • 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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 invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine having at least one injector comprising an injector body which is equipped with a high-pressure accumulator, an axially displaceable guided in the injector nozzle needle, which is surrounded by a nozzle chamber, a high-pressure accumulator with the nozzle chamber connecting high-pressure line and a parallel to the high-pressure line connected resonator, which communicates with the nozzle chamber in communication and opens via a resonator in the high-pressure accumulator.
  • WO 2007/143768 A1 can be taken from a training in which a parallel to the high-pressure line between the injector 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 invention therefore aims to ensure a safe and stable arrangement of the resonator even at system pressures of greater than 1800 bar and to reduce the stresses in the transition region of the resonator or the high-pressure bore.
  • the invention essentially provides, starting from a device of the type mentioned above, that the resonator line and the high-pressure line are formed at least in their section adjacent to the high-pressure accumulator in a holding body, which is screwed into the storage tube forming the high-pressure accumulator.
  • the holding body thus has both the high-pressure bore and the resonator bore arranged parallel thereto the fact that the holding body is screwed into the end face of the storage tube forming the high-pressure accumulator leads to a direct connection between the high-pressure accumulator and the bores of the resonator element being produced and due to the screw connection an extremely stable system suitable for high system pressures Connection is achieved.
  • the screw connection allows this in a simple manner to apply sufficient contact forces in the region of a conical seat
  • a preferred embodiment in this context provides that the holding body has a conical seat on the front side, with a tapered seat on the storage tube to seal the connection between the holding body and storage tube interacts.
  • Such a conical seat leads both to an effective seal and to a stabilization of the resonator throttle having the holding body, so that micro-movements are suppressed even at high system pressures.
  • the cone angle of the conical seat surface of the holding body is smaller than the cone angle of the tapered seat of the storage tube, a circular contact between the storage tube and the holding body is achieved in the region of the conical seat, wherein along this line of contact concentration is carried out by introduced into the respective contact partners forces, which may also be in this area to a depression of the edge of the storage tube in the conical seat surface of the holding body, resulting in a further stabilization.
  • the holding body has on the screwed into the storage tube end face surrounding the mouth of the resonator and the mouth of the high-pressure line annular recess.
  • the fluid pressure prevailing in the high-pressure accumulator can be utilized in order to introduce forces acting in the direction of said transition region into the holding body.
  • the forces acting on the holding body in the direction of the transition region from the outside in this case act as counter forces to the forces occurring in the resonator line in the transition region, so that overall a stabilizing effect is achieved and unwanted local stress states are avoided.
  • annular recess is surrounded by an annular projection on the end face of the holding body having an end face against which the mouth of the resonator is set back in the axial direction.
  • the diameter of the holding body corresponds to at least four times, preferably at least eight times, the diameter of the resonator line.
  • FIG. 2 schematically a cross section of an injector equipped with a high-pressure accumulator
  • FIG. Fig.2 a detailed view in the region of the holding body and the high-pressure accumulator
  • Figure 3 a detailed view of the connection region between the resonator and the high-pressure accumulator.
  • an injector 1 having an injection nozzle 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 nozzle 2, the throttle plate 3 and the valve plate 4 holds together.
  • the solenoid valve 13 is closed, so that 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 nozzle 2, the outflow from the control chamber 11 via the outlet throttle 12 but at the valve seat of the solenoid valve 13 is blocked.
  • 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 nozzle needle seat 16, so that the injection holes 17 are closed. 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. It establishes a defined by the flow cross-sections of inlet throttle 10 and outlet throttle 12 equilibrium pressure in the control chamber 11, which is so low that the voltage applied in the nozzle chamber 19 system pressure is able to open the nozzle body longitudinally displaceable guided nozzle needle 15 so that the spray holes 17 are released and an injection takes place.
  • a resonator is used. This consists of a resonator 20, which has 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 holding body 5 is screwed into the front side of the high-pressure accumulator 6 forming the storage tube 22.
  • the holding body 5 has a conical seat surface on the front side 23, which cooperates with a conical seat surface 24 on the storage tube 22 for sealing the connection between the holding body 5 and storage tube 22.
  • a ring seal 25 provides an additional seal.
  • the cone angle of the conical seat 23 of the holding body 5 is smaller than the cone angle of the tapered seat 24 of the storage tube 22, wherein the tapered seat 23 of the holding body 5 from the inner wall 26 of the storage tube 22 into the interior of the high-pressure accumulator 6 protrudes.
  • the holding body 5 has an annular recess 27 surrounding the mouth of the resonator line 20 and the mouth of the high-pressure line 8 on the end face screwed into the storage tube 22.
  • the annular recess 27 is surrounded by an annular projection 28 on the end face of the holding body 5, which has an end face 29 against which the mouth of the resonator 20 and the resonator 21 is set back in the axial direction.

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  • 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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne comprenant au moins un injecteur (1) comportant un corps d'injecteur qui est doté d'un accumulateur haute pression (6), une aiguille d'injecteur (15) guidée de manière axialement mobile dans l'injecteur (1), laquelle est entourée par une chambre d'injecteur (19), une conduite haute pression (8) reliant l'accumulateur haute pression (6) à la chambre d'injecteur (19) et une conduite de résonateur (20) montée en parallèle avec la conduite haute pression (8), laquelle conduite de résonateur est en liaison avec la chambre d'injecteur (19) et débouche, par le biais d'un étranglement de résonateur (21), dans l'accumulateur haute pression (6), caractérisé en ce que la conduite de résonateur (20) et la conduite haute pression (8) sont réalisées, au moins dans leur portion adjacente à l'accumulateur haute pression (6), dans un corps de retenue (5) qui est vissé du côté frontal dans le tube d'accumulateur (22) formant l'accumulateur haute pression (6).
  2. Dispositif selon la revendication 1, caractérisé en ce que le corps de retenue (5) présente du côté frontal une surface de siège conique (23) qui coopère avec une surface de siège conique (24) sur le tube d'accumulateur (22) pour réaliser l'étanchéité de la liaison entre le corps de retenue (5) et le tube d'accumulateur (22).
  3. Dispositif selon la revendication 2, caractérisé en ce que l'angle de cône de la surface de siège conique (23) du corps de retenue (5) est inférieur à l'angle de cône de la surface de siège conique (24) du tube d'accumulateur (22).
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que la surface de siège conique (23) du corps de retenue (5) fait saillie à partir de la paroi intérieure (26) du tube d'accumulateur (22) dans l'intérieur de l'accumulateur haute pression (6).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le corps de retenue (5) comprend, sur le côté frontal vissé dans le tube d'accumulateur (22), un évidement annulaire (27) entourant l'embouchure de la conduite de résonateur (20) et l'embouchure de la conduite haute pression (8).
  6. Dispositif selon la revendication 5, caractérisé en ce que l'évidement annulaire (27) est entouré par une saillie annulaire (28) sur le côté frontal du corps de retenue (5), lequel comprend une surface frontale (29) par rapport à laquelle l'embouchure de la conduite de résonateur (20) est disposée en retrait dans la direction axiale.
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le diamètre du corps de retenue (5) correspond au moins à quatre fois, de préférence au moins à huit fois, le diamètre de la conduite de résonateur (20).
EP20110785565 2010-11-02 2011-11-02 Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne Active EP2635794B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0180910A AT509877B1 (de) 2010-11-02 2010-11-02 Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
PCT/AT2011/000444 WO2012058703A1 (fr) 2010-11-02 2011-11-02 Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2635794A1 EP2635794A1 (fr) 2013-09-11
EP2635794B1 true EP2635794B1 (fr) 2015-05-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110785565 Active EP2635794B1 (fr) 2010-11-02 2011-11-02 Dispositif pour injecter du carburant dans la chambre de combustion d'un moteur à combustion interne

Country Status (9)

Country Link
US (1) US9447720B2 (fr)
EP (1) EP2635794B1 (fr)
JP (1) JP5778291B2 (fr)
KR (1) KR101479005B1 (fr)
CN (1) CN103180597B (fr)
AT (1) AT509877B1 (fr)
BR (1) BR112013010712A2 (fr)
RU (1) RU2559096C2 (fr)
WO (1) WO2012058703A1 (fr)

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AT512439B1 (de) * 2012-01-26 2013-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
AT512297B1 (de) * 2012-02-07 2013-07-15 Bosch Gmbh Robert Gewindeverbindung von hochdruckmedium führenden komponenten einer einspritzvorrichtung für brennkraftmaschinen
AT511801B1 (de) 2012-02-07 2013-03-15 Bosch Gmbh Robert Verfahren zur beeinflussung der gewindegeometrie eines innengewindes für brennkraftmaschinen
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DE102012208075A1 (de) * 2012-05-15 2013-11-21 Man Diesel & Turbo Se Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage
AT512960B1 (de) * 2012-05-22 2014-03-15 Bosch Gmbh Robert Injektor eines modularen Common-Rail-Kraftstoffeinspritzsystems
AT513321A1 (de) 2012-08-16 2014-03-15 Bosch Gmbh Robert Gewindeverbindung zum Verbinden von Hochdruckmedium führenden Komponenten
AT515933B1 (de) 2015-01-02 2016-01-15 Ge Jenbacher Gmbh & Co Og Kraftstoffinjektor
CN106523223A (zh) * 2017-01-18 2017-03-22 哈尔滨工程大学 一种微动态回油谐振旁通式电控喷油器
CN106593722A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 一种带有刻沟的谐振孔板式电控喷油器
CN106762284A (zh) * 2017-01-18 2017-05-31 哈尔滨工程大学 一种带有刻沟的谐振旁通式电控喷油器
CN106704064A (zh) * 2017-01-18 2017-05-24 哈尔滨工程大学 双路进油谐振孔板式电控喷油器
CN106593721A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 一种带有刻沟的双路进油谐振旁通式电控喷油器
CN106762285A (zh) * 2017-01-18 2017-05-31 哈尔滨工程大学 一种微动态回油谐振式电控喷油器
CN107035586B (zh) * 2017-01-18 2023-01-03 哈尔滨工程大学 一种带液力反馈的微动态回油谐振式电控喷油器
CN106762283A (zh) * 2017-01-18 2017-05-31 哈尔滨工程大学 一种带有刻沟的双路进油谐振式电控喷油器
CN106593725A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 谐振式电控喷油器
CN106762279B (zh) * 2017-01-18 2023-03-21 哈尔滨工程大学 一种带液力反馈的谐振旁通式电控喷油器
CN106762278B (zh) * 2017-01-18 2023-03-21 哈尔滨工程大学 一种带液力反馈的微动态回油谐振旁通式电控喷油器
CN106593719A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 谐振旁通式电控喷油器
CN106704065A (zh) * 2017-01-18 2017-05-24 哈尔滨工程大学 一种带有刻沟的谐振式电控喷油器
CN106762287B (zh) * 2017-01-18 2023-03-21 哈尔滨工程大学 一种带液力反馈的谐振孔板式电控喷油器
CN106593726A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 双路进油谐振式电控喷油器
CN106523222A (zh) * 2017-01-18 2017-03-22 哈尔滨工程大学 一种带有刻沟的双路进油谐振孔板式电控喷油器
US10544771B2 (en) * 2017-06-14 2020-01-28 Caterpillar Inc. Fuel injector body with counterbore insert
EP3502460B1 (fr) * 2017-12-19 2024-03-13 Vitesco Technologies GmbH Connecteur de fixation servant à fixer deux composants entre eux
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CN112196710A (zh) * 2020-10-09 2021-01-08 一汽解放汽车有限公司 一种燃料喷射器

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Also Published As

Publication number Publication date
KR20130098397A (ko) 2013-09-04
JP5778291B2 (ja) 2015-09-16
BR112013010712A2 (pt) 2019-09-24
US20130220271A1 (en) 2013-08-29
AT509877B1 (de) 2011-12-15
WO2012058703A1 (fr) 2012-05-10
EP2635794A1 (fr) 2013-09-11
US9447720B2 (en) 2016-09-20
CN103180597A (zh) 2013-06-26
JP2013541670A (ja) 2013-11-14
RU2013125451A (ru) 2014-12-10
CN103180597B (zh) 2015-07-22
KR101479005B1 (ko) 2015-01-05
AT509877A4 (de) 2011-12-15
RU2559096C2 (ru) 2015-08-10

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