WO2014106525A1 - Injecteur à deux aiguilles - Google Patents

Injecteur à deux aiguilles Download PDF

Info

Publication number
WO2014106525A1
WO2014106525A1 PCT/EP2013/003726 EP2013003726W WO2014106525A1 WO 2014106525 A1 WO2014106525 A1 WO 2014106525A1 EP 2013003726 W EP2013003726 W EP 2013003726W WO 2014106525 A1 WO2014106525 A1 WO 2014106525A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
control
doppelnadelinjektor
nozzle
pressure
Prior art date
Application number
PCT/EP2013/003726
Other languages
German (de)
English (en)
Inventor
Dominik Hagen
Original Assignee
L'orange 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 L'orange Gmbh filed Critical L'orange Gmbh
Publication of WO2014106525A1 publication Critical patent/WO2014106525A1/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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side

Definitions

  • the present invention relates to a Doppelnadelinjektor according to the preamble of claim 1, in particular for a fuel injection device, e.g. of a motor vehicle.
  • EP 1 541 859 B1 discloses an indirect (via pilot valve and control chamber) controlled double needle injector which allows the injection rate profile to be formed using an inner and an outer nozzle needle (coaxially arranged nozzle needles).
  • the outer nozzle needle here is associated with a driver, which causes the opening and closing of the inner nozzle needle.
  • the disadvantage here is that the injector is mechanically complex to manufacture and difficult to control. Due to the superimposed injection holes further difficulties arise.
  • the present invention has the object to provide a Doppelnadelinjektor, which overcomes the disadvantages of the prior art, in particular is simple and robust.
  • a Doppelnadelinjektor with two indirectly controlled nozzle needles, which are arranged side by side and each controllable via a separate (separate) control chamber of the injector.
  • the double needle injector is designed to always set a uniform control pressure level (fluid pressure) in the control chambers, the effective cross-sectional areas of the nozzle needles in the control chambers being exposed to the control pressure being different.
  • the proposed injector is mechanically robust and advantageously inexpensive to control.
  • the double needle injector has a communication connection between the control chambers for setting the uniform control pressure level.
  • the injector advantageously has only a single inlet throttle and / or only a single outlet throttle for setting the control pressure level in the control chambers.
  • the injector has only a single control valve (pilot valve, i.e. for indirect control) for the selective relief of both control spaces. This can be a cheap 2/2-way valve.
  • the outlet throttle may be arranged in a flow path on the injector, which leads from the control chambers, in particular of the communication link, to a low pressure side (leakage), while the control valve is preferably arranged to selectively block the flow path to the low pressure side downstream of the outlet throttle.
  • the injector is further designed such that each nozzle needle by means of a volume in the injector (eg annular space around the nozzle needle) can be acted upon with an opening pressure, wherein the injector is adapted to set uniform system pressure in the volumes, in particular via a communicating connection of the volumes ,
  • a fuel injector may be formed, e.g. a common rail system.
  • FIG. 1 shows by way of example a diagram of a double needle injector according to a preferred embodiment of the invention.
  • 2a and b are exemplary and schematic diagrams of the needle stroke and the resulting injection rate of a Doppelnadelinjektors invention.
  • Fig. 1 shows by way of example and schematically a double needle injector 1 for use with a fuel injector, i. for injecting fuel into a combustion chamber.
  • the injector 1 is used with a common rail system.
  • the Doppelnadelinjektor 1 comprises two indirectly controlled nozzle needles 3 and 5, which are each arranged in a volume or a bore 7 and 9 in the injector housing 11 axially displaceable juxtaposed.
  • Each nozzle needle 3 and 5 acts against a valve seat 13 and 15 of a nozzle valve 17 and 19.
  • Each nozzle needle 3 and 5 is guided at its nozzle-distal end in a needle sleeve 21 and 23, which may also be received in the bore 7 and 9, and which with a nozzle-distal end 25 each against a stop element 27, for example in shape a valve plate is urged.
  • a helical compression spring 31 is arranged, which urges the respective nozzle needle 3 and 5 in the closed position.
  • a respective bore 7 or 9 can be flowed through at least one high-pressure passage 33 on the injector 1, ie with high pressure-loaded fuel.
  • each nozzle needle 3 and 5 For indirect control of the nozzle needles 3 and 5 (needle stroke), each nozzle needle 3 and 5, a separate control chamber 35 and 37 assigned to the injector 1, wherein the control chambers via a (single) pilot or control valve 39, preferably a second / 2-way valve, can be selectively relieved of pressure.
  • a respective control chamber 35 or 37 may be defined by means of a needle guide sleeve 21 and 23, the stop element 27 and the nozzle distal end of the respective nozzle needle 3 and 5 respectively.
  • the Doppelnadelinjektor 1 is designed for one, always set a uniform control pressure level in the control chambers 33 and 35 respectively.
  • a communication connection 41 between the control chambers 35 and 37 may be formed on the injector 1, for example on the valve plate 27, for example in the form of a communicating bore (bridge).
  • a further simplified control possibility can be achieved in the context of the present invention by forming the injector 1 so that always uniform system pressure in the volumes 7, 9 - via which a respective nozzle needle 3 and 5 can be acted upon with an opening pressure (ie against the shoulder 29) - is adjustable.
  • a communication connection of the volumes 7 and 9 may be provided, e.g. formed by a (Bohr) channel K.
  • the manufacturing cost can be kept low here, as a single high pressure line 33 to the flow of the volumes 7, 9 sufficient.
  • inlet throttle 43 may be arranged in a high pressure flow path 49 to one of the control chambers 35 and / or 37, the flow path 49 being e.g. branches off from the high pressure passage 33.
  • the drainage throttle 51 may be disposed in a flow path 53 which communicates at one end with the control chambers 35 and 37 and at the other end is selectively disconnectable to the low pressure side, i.e. preferably via the only required control valve 39.
  • the flow path 53 communicate with the communication link 41.
  • the operation of the double needle injector 1 will be briefly explained.
  • a uniform high-pressure control pressure prevails in the loaded control chambers 35, 37 due to the fuel introduced via the inlet throttle 43 into the control chambers 35, 37 (besides a uniform system pressure level as well) in volumes 7, 9).
  • the nozzle needle 5 experiences a higher closing force than the nozzle needle 3, insofar as the nozzle needle 5 has a larger effective cross-sectional area 39 than the nozzle needle 3.
  • control valve 39 In order to open the nozzle valves 17, 19 for an injection process (indirect needle control), the control valve 39 is opened, whereupon the pressure in the control chambers 35 and 37 - depending on the size ratio outlet throttle 51 / inlet throttle 47 - is reduced, that is, by the outflow of Fuel from the control chambers 35, 37 via the dormitorströmungsweg 53 with the outlet throttle 51st
  • the cross-sectional areas 37 and 39 are preferably designed so that the nozzle needle 3 opens in time before the nozzle needle 5 and thus in the resulting injection rate curve two flanks A, B of different pitch arise, Fig. 2b.
  • the nozzle needle 5 may preferably form with its valve seat 15 a nozzle valve 19 with a larger releasable valve cross-section than the nozzle needle 3 with its valve seat 13, for which purpose the valve seat 15 and the nozzle needle 5 may have a larger diameter than the valve seat 13 and the nozzle needle 3.
  • the control valve 39 For closing the nozzle needles 3, 5 corresponding to a termination of the injection process, the control valve 39 is first closed. In this case, in turn, a uniform system pressure control pressure level in the control chambers 35, 37 is set, that is, via the inlet throttle 47 and the now Supported by the closing force of the spring 31, the nozzle needles 3 and 5 begin to close substantially simultaneously, the nozzle needle 5 closes slightly slower, as far as the pressure build-up in the control chamber 37 takes a little longer due to the larger volume.
  • the invention advantageously enables a stepped injection and thus the influencing of the total injection rate of the injector 1 by the combination of different opening times of the needles 3 and 5.
  • further influencing measures can be provided, eg differently designed springs 31 or eg differently shaped shoulders 29.

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 à deux aiguilles (1), comprenant deux aiguilles d'injecteur (3, 5) à commande indirecte qui sont disposées l'une à côté de l'autre et qui peuvent être commandées chacune par l'intermédiaire d'une propre chambre de commande (35, 37) de l'injecteur (1). L'injecteur (1) est conçu pour régler en permanence un niveau de pression de commande homogène dans les chambres de commande (35, 37), les aires de section efficace (37, 39) des aiguilles d'injecteur (3, 5) soumises à la pression de commande dans les chambres de commande (35, 37) étant différentes. Figure HD HP ND BP
PCT/EP2013/003726 2013-01-07 2013-12-10 Injecteur à deux aiguilles WO2014106525A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310000048 DE102013000048B3 (de) 2013-01-07 2013-01-07 Doppelnadelinjektor
DE102013000048.3 2013-01-07

Publications (1)

Publication Number Publication Date
WO2014106525A1 true WO2014106525A1 (fr) 2014-07-10

Family

ID=49766030

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/003726 WO2014106525A1 (fr) 2013-01-07 2013-12-10 Injecteur à deux aiguilles

Country Status (2)

Country Link
DE (1) DE102013000048B3 (fr)
WO (1) WO2014106525A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016168875A1 (fr) 2015-04-21 2016-10-27 Ge Jenbacher Gmbh & Co Og Moteur à combustion interne bi-carburant
US9856838B2 (en) 2014-07-19 2018-01-02 L'orange Gmbh Dual fuel fuel-injector
US9903325B2 (en) 2014-07-19 2018-02-27 L'orange Gmbh Dual fuel fuel-injector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014016927B3 (de) 2014-11-17 2016-05-12 L'orange Gmbh Dual-Fuel-Kraftstoffinjektor
CN105464865B (zh) * 2016-01-13 2017-11-07 吉林大学 一种柴油机双喷油嘴喷油器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62118055A (ja) * 1985-11-16 1987-05-29 Mitsubishi Heavy Ind Ltd 可変噴口燃料噴射弁
JP2000329025A (ja) * 1999-05-17 2000-11-28 Isuzu Motors Ltd インジェクタ
EP1111229A2 (fr) * 1999-12-16 2001-06-27 Wärtsilä NSD Oy Ab Injecteur de carburant pour moteur alternatif à combustion interne
US20030015599A1 (en) * 2001-07-19 2003-01-23 Carroll John T. Fuel injector with injection rate control
JP2006105008A (ja) * 2004-10-04 2006-04-20 Denso Corp 燃料噴射弁
US20070246561A1 (en) * 2006-03-31 2007-10-25 Gibson Dennis H Twin needle valve dual mode injector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB549419A (en) * 1941-04-18 1942-11-20 Nat Gas And Oil Engine Company Improvements in or relating to injection nozzles for internal-combustion engines
DE10357873A1 (de) * 2003-12-11 2005-07-07 Robert Bosch Gmbh Einspritzventil
FI123513B (fi) * 2010-12-02 2013-06-14 Waertsilae Finland Oy Polttoaineen syöttöyksikkö, menetelmä sen käyttämiseksi ja polttomoottori

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62118055A (ja) * 1985-11-16 1987-05-29 Mitsubishi Heavy Ind Ltd 可変噴口燃料噴射弁
JP2000329025A (ja) * 1999-05-17 2000-11-28 Isuzu Motors Ltd インジェクタ
EP1111229A2 (fr) * 1999-12-16 2001-06-27 Wärtsilä NSD Oy Ab Injecteur de carburant pour moteur alternatif à combustion interne
US20030015599A1 (en) * 2001-07-19 2003-01-23 Carroll John T. Fuel injector with injection rate control
JP2006105008A (ja) * 2004-10-04 2006-04-20 Denso Corp 燃料噴射弁
US20070246561A1 (en) * 2006-03-31 2007-10-25 Gibson Dennis H Twin needle valve dual mode injector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9856838B2 (en) 2014-07-19 2018-01-02 L'orange Gmbh Dual fuel fuel-injector
US9903325B2 (en) 2014-07-19 2018-02-27 L'orange Gmbh Dual fuel fuel-injector
WO2016168875A1 (fr) 2015-04-21 2016-10-27 Ge Jenbacher Gmbh & Co Og Moteur à combustion interne bi-carburant
US10352259B2 (en) 2015-04-21 2019-07-16 Innio Jenbacher Gmbh & Co Og Dual-fuel internal combustion engine

Also Published As

Publication number Publication date
DE102013000048B3 (de) 2014-06-12

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