WO2013174601A1 - Injecteur d'un système d'injection de carburant - Google Patents

Injecteur d'un système d'injection de carburant Download PDF

Info

Publication number
WO2013174601A1
WO2013174601A1 PCT/EP2013/058491 EP2013058491W WO2013174601A1 WO 2013174601 A1 WO2013174601 A1 WO 2013174601A1 EP 2013058491 W EP2013058491 W EP 2013058491W WO 2013174601 A1 WO2013174601 A1 WO 2013174601A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
bore
resonator
injector
holding body
Prior art date
Application number
PCT/EP2013/058491
Other languages
German (de)
English (en)
Inventor
Franz Guggenbichler
Martin Bernhaupt
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
Priority to EP13718835.5A priority Critical patent/EP2852754B1/fr
Publication of WO2013174601A1 publication Critical patent/WO2013174601A1/fr

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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches

Definitions

  • the invention relates to an injector of a modular common rail fuel injection system with a high-pressure accumulator integrated in the injector body, the injector having an injection nozzle with a nozzle needle guided axially displaceably, surrounded by a nozzle chamber, a high-pressure bore connecting the high-pressure accumulator with the nozzle chamber, a parallel to High-pressure bore switched resonator, which communicates with the injector and is connected via a resonator choke in the high-pressure accumulator, and a
  • 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 on particularly large engines where 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 due to the long lines during injection to a massive slump in Ein-injection pressure, so with prolonged injection duration, the injection rate would noticeably break.
  • each injector has its own high-pressure accumulator and thus can be used as a stand-alone module.
  • a high-pressure accumulator this is not a common line to understand, but it is a high-pressure accumulator to a pressure-resistant vessel with an inlet and outlet whose diameter in
  • a possibility of reducing pressure pulsations can be taken from WO 2007/143768 A1, wherein a resonator line connected in parallel to the high-pressure line between the injection nozzle and the high-pressure accumulator is provided, which has a resonator throttle on the high-pressure accumulator side.
  • a resonator line connected in parallel to the high-pressure line between the injection nozzle and the high-pressure accumulator is provided, which has a resonator throttle on the high-pressure accumulator side.
  • Resonator choke arranged at the entrance of the resonator in the high-pressure accumulator.
  • the resonator bore is first drilled in the form of a blind hole with a diameter of eg 3 mm from one side of the holding body ago. Thereafter, the resonator throttle is drilled, for example, with a diameter of 0.7 - 0.9 mm from the opposite side, this hole should open as central as possible in the resonator bore for reasons of high pressure resistance.
  • the axis of the resonator bore should thus coincide with the axis of the resonator choke.
  • Drilling error leads to the fact that the throttle bore does not open centrally in the resonator bore, but offset by up to 0.5 mm.
  • the invention therefore aims to realize the described resonator function in injectors with longer high-pressure wells in a structurally simple manner, without significantly impairing the high-pressure resistance.
  • the invention essentially provides, starting from an injector of the type mentioned above, that an end portion of the high-pressure bore facing the high-pressure accumulator and an end portion of the resonator bore facing the high-pressure accumulator and having the resonator throttle is designed in a separate component which is located between the holding body and the storage tube is inserted and is fixed by the screw connection of holding body and storage tube.
  • the separate component is made shorter than the holding body, so for example. is formed with an axial length of less than 100mm, preferably less than 50 mm, more preferably less than 30mm. At most, an offset occurs at the transition between the resonator bore embodied in the holding body and the end portion of the resonator bore executed in the separate component, which is less critical with regard to the high-pressure resistance.
  • the separate component is in this case held only by the axial force generated during screwing of the holding body with the storage tube and clamped between these two components without the need for further fasteners as it were.
  • a preferred embodiment of the invention provides that the holding body and the separate component are secured against rotation by means of an axial pin.
  • the separate component carries a conical sealing surface, which cooperates with a formed on a shoulder of the storage tube conical mating surface of the storage tank.
  • the separate component preferably has a planar sealing surface which cooperates with the planar end face of the holding body.
  • a preferred embodiment provides that the two end sections converge towards one another.
  • the two end sections open into a blind hole formed in the separate component.
  • the two end sections can also run parallel to one another.
  • the separate component is designed as a plate.
  • the resonator throttle is arranged at the inlet of the resonator bore into the high-pressure accumulator.
  • the resonator choke is thus formed in the separate component.
  • the resonator throttle can be designed in different lengths.
  • the resonator throttle may be relatively short, so that it extends only over a short axial section, in particular via an end section of the separate component, in particular the plate, facing the high-pressure accumulator.
  • the resonator choke can extend through the separate component, in particular the plate, so that its length corresponds to the axial extension of the separate component, in particular the plate.
  • 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 a inlet throttle having inlet channel and a flow channel having an outlet throttle is in communication and at least one control valve opening or closing the inlet or outlet channel is seen, with which the pressure in the control chamber is controlled, that the inlet throttle and the outlet throttle are formed in a throttle plate, that the control valve is formed in a valve plate and that the high-pressure bore and the resonator bore to pass through the valve plate and the throttle plate.
  • the injector is usually designed such that an injector and / or holding body accommodating the high-pressure accumulator, the valve plate, the throttle plate and the injection nozzle are held together by a nozzle retaining nut.
  • the high-pressure bore and the resonator bore extend through the holding body, the valve plate and the throttle plate and thereby connect the high-pressure accumulator with the injection nozzle.
  • the length of the resonator bore is preferably matched to the length of the high-pressure bore so that the pressure oscillations induced by the injector mutually weaken or extinguish each other.
  • the length of the resonator bore between the injection nozzle and the resonator throttle as well as the length of the high-pressure bore between the injection nozzle and the inlet of the high-pressure bore into the pressure accumulator are each preferably an integer multiple of the wavelength of the pressure oscillation induced by the injection nozzle.
  • the length of the resonator bore between the nozzle front chamber and the resonator throttle preferably corresponds substantially to the length of the high-pressure bore between the nozzle front chamber and the inlet of the high-pressure bore into the pressure accumulator.
  • FIG. 1 shows schematically a cross section of an injector equipped with a high-pressure accumulator according to the prior art
  • FIG. 2 shows a detailed representation of the confluence region of the resonator throttle in the high-pressure accumulator.
  • an injector 1 which has an injection nozzle 2, a throttle plate 3, a valve plate 4, a holding body 5 and a high-pressure accumulator 6, wherein a bolted 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 is closed, so that high pressure fuel from the high-pressure accumulator 6 via the high-pressure bore 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 at the valve seat of the solenoid valve thirteenth is blocked.
  • a resonator is used. This consists of a resonator bore 20, which has the same length and possibly the same diameter as the high-pressure bore 8, and a resonator throttle 21 which is attached to the memory-side end of the resonator bore 20 and connects it to the high-pressure reservoir 6.
  • FIG. 2 shows a arranged between the storage tube 25, the high-pressure accumulator 6 and the holding body 5 plate 23, which represents the present invention provided separate component.
  • the plate 23 has a conical sealing surface 24 which cooperates with a formed on a shoulder 26 of the storage tube 25 conical mating sealing surface.
  • the shoulder 26 of the storage tube 25 is connected via an annular groove-like recess 27 with a thin-walled, provided with an internal thread 28 portion 29 of the storage tube 25.
  • the plate 23 is inserted between the holding body 5 and the storage tube 25 and fixed by the screw connection of these two components.
  • the plate 23 is secured by means of at least one pin 30 against rotation.
  • a ring seal 36 provides an additional seal.
  • an end portion 32 of the high-pressure bore 8 and an end portion 33 of the resonator bore 20 is now formed.
  • the two end portions extend obliquely to the injector 34 and converge toward a high-pressure accumulator-side blind hole 35, in which both end portions 32, 33 open.
  • the end section 33 of the resonator bore 20 opens into the high-pressure accumulator 6 via the resonator throttle 21.
  • the end section 32 merges into the high-pressure bore 8 and the end section 3 into the resonator bore.

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 injecteur d'un système modulaire d'injection de carburant à rampe commune, présentant un accumulateur haute pression (6) intégré dans le corps de l'injecteur, l'injecteur (1) comprenant une buse de pulvérisation (3) présentant une aiguille d'injecteur (15) guidée mobile axialement, entourée par une chambre d'injecteur (19), un alésage haute pression (8) reliant l'accumulateur haute pression (6) avec la chambre d'injecteur (19), un alésage de résonateur (20), monté en parallèle avec l'alésage haute pression (8), qui est en liaison avec la buse de pulvérisation (3), et qui débouche, via un étranglement du résonateur (21), dans l'accumulateur haute pression (6), et un corps d'arrêt (5), qui est vissé, côté frontal, avec le composant formant l'accumulateur haute pression (6), en particulier le tube accumulateur (25), et à travers lequel s'étendent l'alésage haute pression (8) et l'alésage de résonateur (20). Une section terminale (32) de l'alésage haute pression (8), tournée vers l'accumulateur haute pression (6), et une section terminale (33) de l'alésage de résonateur (20), présentant l'étranglement du résonateur (21) sont réalisées dans un composant distinct (23), qui est inséré entre le corps d'arrêt (5) et le tube accumulateur (25), et qui est fixé par vissage du corps d'arrêt (5) et du tube accumulateur (25).
PCT/EP2013/058491 2012-05-22 2013-04-24 Injecteur d'un système d'injection de carburant WO2013174601A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13718835.5A EP2852754B1 (fr) 2012-05-22 2013-04-24 Injecteur d'un système d'injection de carburant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT601/2012 2012-05-22
AT6012012A AT512960B1 (de) 2012-05-22 2012-05-22 Injektor eines modularen Common-Rail-Kraftstoffeinspritzsystems

Publications (1)

Publication Number Publication Date
WO2013174601A1 true WO2013174601A1 (fr) 2013-11-28

Family

ID=48190500

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/058491 WO2013174601A1 (fr) 2012-05-22 2013-04-24 Injecteur d'un système d'injection de carburant

Country Status (3)

Country Link
EP (1) EP2852754B1 (fr)
AT (1) AT512960B1 (fr)
WO (1) WO2013174601A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB714502A (en) * 1951-06-15 1954-09-01 Ici Ltd Improvements in or relating to plastic articles reinforced with fibrous materials comprising aromatic polyesters
WO2015116777A1 (fr) * 2014-01-31 2015-08-06 Cummins Inc. Système d'amortissement de pulsation de pression d'injection de carburant
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
CN107035586A (zh) * 2017-01-18 2017-08-11 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
CN107429645A (zh) * 2015-03-20 2017-12-01 德尔福国际业务卢森堡公司 控制阀本体
CN114165376A (zh) * 2021-12-17 2022-03-11 中国船舶重工集团公司第七一一研究所 喷油器以及喷油方法
WO2022148679A1 (fr) * 2021-01-11 2022-07-14 Robert Bosch Gmbh Dispositif d'injection de carburant

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002046601A1 (fr) * 2000-12-07 2002-06-13 Robert Bosch Gmbh Systeme d'injection de carburant pour moteurs a combustion interne
WO2002046602A1 (fr) * 2000-12-07 2002-06-13 Robert Bosch Gmbh Systeme d'injection de carburant pour moteurs a combustion interne
WO2002090753A1 (fr) * 2001-05-05 2002-11-14 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion, comprenant une chambre d'amortissement reduisant les oscillations de pression
EP1314883A2 (fr) * 2001-11-21 2003-05-28 MAN B & W Diesel AG Système d'alimentation en carburant à rampe commune pour un moteur à combustion interne à plusieurs cylindres
FR2862352A1 (fr) * 2003-11-14 2005-05-20 Renault Sas Dispositif d'injection de carburant equipe de moyens d'amortissement d'ondes de pression
WO2007143768A1 (fr) * 2006-06-13 2007-12-21 Robert Bosch Gmbh Dispositif d'injection de carburant dans une chambre de combustion d'un moteur à combustion interne
JP2010275908A (ja) * 2009-05-27 2010-12-09 Yanmar Co Ltd インジェクタ
AT509877A4 (de) * 2010-11-02 2011-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH702496B1 (de) * 2010-05-07 2011-07-15 Liebherr Machines Bulle Sa Hochdruckinjektor.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002046601A1 (fr) * 2000-12-07 2002-06-13 Robert Bosch Gmbh Systeme d'injection de carburant pour moteurs a combustion interne
WO2002046602A1 (fr) * 2000-12-07 2002-06-13 Robert Bosch Gmbh Systeme d'injection de carburant pour moteurs a combustion interne
WO2002090753A1 (fr) * 2001-05-05 2002-11-14 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion, comprenant une chambre d'amortissement reduisant les oscillations de pression
EP1314883A2 (fr) * 2001-11-21 2003-05-28 MAN B & W Diesel AG Système d'alimentation en carburant à rampe commune pour un moteur à combustion interne à plusieurs cylindres
FR2862352A1 (fr) * 2003-11-14 2005-05-20 Renault Sas Dispositif d'injection de carburant equipe de moyens d'amortissement d'ondes de pression
WO2007143768A1 (fr) * 2006-06-13 2007-12-21 Robert Bosch Gmbh Dispositif d'injection de carburant dans une chambre de combustion d'un moteur à combustion interne
JP2010275908A (ja) * 2009-05-27 2010-12-09 Yanmar Co Ltd インジェクタ
AT509877A4 (de) * 2010-11-02 2011-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB714502A (en) * 1951-06-15 1954-09-01 Ici Ltd Improvements in or relating to plastic articles reinforced with fibrous materials comprising aromatic polyesters
WO2015116777A1 (fr) * 2014-01-31 2015-08-06 Cummins Inc. Système d'amortissement de pulsation de pression d'injection de carburant
US9644590B2 (en) 2014-01-31 2017-05-09 Cummins Inc. Fuel injection pressure pulsation dampening system
CN107429645A (zh) * 2015-03-20 2017-12-01 德尔福国际业务卢森堡公司 控制阀本体
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
CN107035586A (zh) * 2017-01-18 2017-08-11 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
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
WO2022148679A1 (fr) * 2021-01-11 2022-07-14 Robert Bosch Gmbh Dispositif d'injection de carburant
CN114165376A (zh) * 2021-12-17 2022-03-11 中国船舶重工集团公司第七一一研究所 喷油器以及喷油方法

Also Published As

Publication number Publication date
EP2852754A1 (fr) 2015-04-01
AT512960B1 (de) 2014-03-15
EP2852754B1 (fr) 2016-12-21
AT512960A1 (de) 2013-12-15

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