EP3394418A1 - Injecteur de carburant - Google Patents

Injecteur de carburant

Info

Publication number
EP3394418A1
EP3394418A1 EP16793833.1A EP16793833A EP3394418A1 EP 3394418 A1 EP3394418 A1 EP 3394418A1 EP 16793833 A EP16793833 A EP 16793833A EP 3394418 A1 EP3394418 A1 EP 3394418A1
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
nozzle
fuel
injection
fuel injector
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.)
Withdrawn
Application number
EP16793833.1A
Other languages
German (de)
English (en)
Inventor
Michael Kurz
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 EP3394418A1 publication Critical patent/EP3394418A1/fr
Withdrawn legal-status Critical Current

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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto

Definitions

  • the invention relates to a fuel injector for injecting two liquid and / or gaseous fuels into a combustion chamber of an internal combustion engine according to the preamble of claim 1.
  • Internal combustion engine which for carrying out various forms of fuel in a combustion chamber of an internal combustion engine, a dual-fuel
  • Fuel injector used in this dual-fuel fuel injector, a first nozzle arrangement, whereby diesel fuel can flow into a combustion chamber, and a second nozzle arrangement, which can discharge gaseous fuel into the combustion chamber, are arranged.
  • the invention is based on the object, a fuel! injector for
  • the fuel injector for injection of two liquid and / or gaseous fuels comprises an injector housing with a nozzle body and a valve body, wherein a first liftably arranged nozzle needle for opening and closing an injection cross section is arranged in the injector housing.
  • the first nozzle needle is formed as a hollow needle, in which a second liftably arranged nozzle needle is arranged. This acts to open and close at least one injection port with a formed in the first nozzle needle inner nozzle seat.
  • the first nozzle needle and the second nozzle needle define one
  • Injection chamber which can be filled with fuel via an inlet throttle.
  • the second nozzle needle In an upper switching position, the second nozzle needle abuts against a sealing seat and thereby separates a connection between the injection space and the
  • Injection of this fuel can be terminated in a combustion chamber of an internal combustion engine, without the second nozzle needle has to reverse their movement.
  • a valve element in the interior of the valve body, a valve element is arranged, which has a multi-stage through-hole. In this blind hole project both the first nozzle needle and the second nozzle needle protrude.
  • the sealing seat is formed on the valve element in order to achieve a compact construction.
  • the valve element can be fastened separately in a simple manner.
  • the inlet throttle may be formed in the valve element.
  • valve element is subjected to a force in the direction of the nozzle seat by a spring. This allows a flexible and very simple fixation of the valve element in Fuel injector without additional fixation, for example by a
  • the first nozzle needle is formed stepped on the outer circumference to make room for a further space in which further components can be accommodated or which can be used to make the injector slimmer.
  • the at least one injection opening is formed on the end face of the first nozzle needle facing a combustion chamber.
  • the nozzle body and the first nozzle needle delimit an antechamber.
  • a spring is present, which applies force to the first nozzle needle in the direction of the combustion chamber.
  • a separating device in particular a membrane, to be arranged in the prechamber, which separates the liquid and / or gaseous fuels from one another, so that the two fuels do not mix despite the unavoidable leakage gaps.
  • valve element and the second nozzle needle limit a subspace in the upper switching position.
  • This subspace forms part of the injection space, wherein it is provided in an advantageous embodiment of the inventive idea that the inlet throttle opens into the subspace.
  • the second nozzle needle is subjected to force by a return spring in the direction of the inner nozzle seat.
  • the first nozzle needle a gaseous fuel flow into the combustion chamber controls and / or that the second nozzle needle controls a liquid fuel flow into the combustion chamber.
  • FIG. 1 shows a schematic longitudinal section through a fuel injector according to the invention
  • FIG. 2 (a) is an enlarged view of the fuel injector according to the invention in the region of the first nozzle needle and the second nozzle needle, wherein the first nozzle needle has an injection cross-section and the second
  • Nozzle needle closes at least one injection port
  • Fig. 2 (b) an enlarged view of the fuel according to the invention! Njektors in the region of the first nozzle needle and the second nozzle needle, wherein the first nozzle needle closes the injection cross-section, the second nozzle needle has released at least one injection port,
  • Fig. 2 (c) an enlarged view of the fuel according to the invention! Njektors in the region of the first nozzle needle and the second nozzle needle, wherein the first nozzle needle has released the injection cross-section and the second nozzle needle closes the at least one injection port,
  • Fig. 3 (a) is a diagram in which on the one hand the stroke H of the first nozzle needle and the stroke h second nozzle needle is plotted against the time t and in the other hand, the injection quantity m of the fuel or of the gas is shown as a function of time t ,
  • Fig. 3 (b) is a diagram in which on the one hand the stroke H of the first nozzle needle and the stroke h of the second nozzle needle is plotted against the time t and in the other hand, the injection quantity m of the fuel or the gas as a function of time t is. This is set second possible injection scenario, where here a
  • FIG. 1 shows a fuel injector according to the invention consisting of an injector housing 1, which has a nozzle body 2, a valve body 3 and a
  • Holding body 4 comprises. Between the valve body 3 and the holding body 4, a magnetic coil 33 is inserted. Furthermore, the fuel injector has an inner pole 5 and a magnet armature 6 consisting of an anchor plate 9 and an anchor bolt 10. In this case, the valve body 3, the holding body 4 and the inner pole 5 define an armature space 22 in which the magnet armature 6 is arranged.
  • the anchor bolt 10 dips into a through hole 13 of the valve body 3 and protrudes into a pressure chamber 21, wherein this pressure chamber 21 is formed in the nozzle body 2 and in the valve body 3 and through the
  • Valve body 3 is limited. Via a rail 23, the armature space 22 can be filled with liquid fuel, which can enter via a feed throttle 49 in the pressure chamber 21.
  • a valve element 14 is arranged, which defines a subspace 44 of the pressure chamber 21 together with the nozzle body 2.
  • a spring 15 is arranged in the pressure chamber 21, which is supported on the valve element 14 and this force in the direction of the nozzle body 2 and thereby fixed in place.
  • the subspace 44 of the pressure chamber 21 has a first liftably arranged nozzle needle 7, which is designed as a hollow needle and in which a second liftably arranged nozzle needle 8 is arranged.
  • the second nozzle needle 8 with its magnet armature facing end side in a through hole 13 of the
  • Valve element 14 out and is firmly connected to the anchor bolt 10 of the armature 6.
  • the subspace 44 of the pressure chamber 21 is due to the
  • Nozzle needle arrangements in turn divided into several individual rooms.
  • the nozzle body 2 with the first nozzle needle 7 on the one hand closes a
  • Inlet channel 48 connected to a formed between a clamping nut 31, the nozzle body 2, the valve body 3 and the holding body 4 gas space 30 is.
  • the gas is fed via a gas supply 32 into the gas space 30.
  • the pre-chamber 28 has a spring 39 and a separator 19, in particular a membrane, which separates the liquid and / or gaseous fuels from each other.
  • the second nozzle needle 8 together with the first nozzle needle 7 and the valve element 14, an injection chamber 20. This is about a in the
  • Valve element 14 formed inlet throttle 36 connected to the pressure chamber 21 and is therefore filled with the first fuel, preferably with liquid fuel.
  • the first nozzle needle 7 closes in a lower
  • the mode of operation of the fuel injector according to the invention is as follows: When the magnetic coil 33 is energized, a magnetic force builds up in the inner pole 5, so that the magnet armature 6 and the second nozzle needle 8 fixedly connected thereto are moved in the direction as shown in FIG. 2 (a) of the inner pole 5 are pulled. As a result, the inner nozzle seat 25 is released and liquid fuel escapes from the injection chamber 20 via a blind bore 34 in the first nozzle needle 7 and via at least one injection opening 35 in the combustion chamber 29 of the internal combustion engine. After a stroke h of the second nozzle needle 8, this reaches an upper switching position and is located on a sealing seat 38 (see Fig. 2 (b)). The sealing seat 38 is on the on
  • Inlet throttle 36 and the flow through the at least one injection port 35 is selected so that the first nozzle needle 7 only moves upward when the second nozzle needle 8 has reached the sealing seat 38.
  • Injection section 27 leads to the introduction of preferably gaseous fuel into the combustion chamber 29 of the internal combustion engine.
  • the second nozzle needle 8 is located on the inner nozzle seat 25 of the first
  • Nozzle needle 7 in its upper switching position and thus closes the at least one injection port 35.
  • FIG. 3 (a) shows the injection process described above in a diagram in which the stroke H of the first nozzle needle 7 and the stroke h of the second nozzle needle 8 are shown as a function of the time t.
  • Nozzle needle 7 and the second nozzle needle 8 in the upper switching position. After switching off the solenoid 33, the first nozzle needle 7 and the second nozzle needle 8 together return the negative stroke h or H.
  • the injection amount m of gaseous fuel is reduced during the movement of the nozzle needles 7 and 8 in the direction of the combustion chamber 29 and is set at time t.2 with closure of the injection cross section 27.
  • FIG. 3 (b) illustrates an alternative injection form of the fuel injector according to the invention.
  • the energization of the solenoid 33 is stopped several times before the second nozzle needle 8 has reached the sealing seat 38.
  • the sealing seat 38 As a result, only small quantities m of liquid fuel are introduced into the combustion chamber 29. Only after the third energization of the solenoid 33 for
  • Time U is the maximum stroke h of the second nozzle needle 8 and thus reaches the maximum injection amount of liquid fuel.
  • the injection of gaseous fuel now begins at time t 5 , when the first nozzle needle 7 moves in the direction of the second nozzle needle 8.
  • Fuel injector Several pre- and post-injections of liquid fuel can be made.

Landscapes

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

Abstract

L'invention concerne un injecteur de carburant pour l'injection de deux carburants sous forme fluide et/ou gazeuse avec un boîtier d'injecteur (1), qui comprend un corps de buse (2) et un corps de soupape (3). Dans le boîtier d'injecteur (1) se trouve une aiguille de buse (7) disposée mobile en course pour l'ouverture et la fermeture d'une section transversale d'injection (27). La première aiguille de buse (7) est ici formée comme une aiguille creuse, dans laquelle est disposée une seconde aiguille de buse (8) disposée mobile en course. Cette dernière agit pour ouvrir et fermer au moins une ouverture d'injection (35) avec un siège de buse (25) interne formé dans la première aiguille de buse (7). La première aiguille de buse (7) et la seconde aiguille de buse (8) limitent un espace d'injection (20) qui peut être rempli avec un carburant par le biais d'un étranglement d'arrivée (36). En outre, la seconde aiguille de buse (8) repose dans une position de commutation supérieure au niveau d'un siège d'étanchéité (38) et sépare ainsi une liaison entre l'espace d'injection (20) et l'étranglement d'arrivée (36).
EP16793833.1A 2015-12-22 2016-11-07 Injecteur de carburant Withdrawn EP3394418A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015226514.5A DE102015226514A1 (de) 2015-12-22 2015-12-22 Kraftstoffinjektor
PCT/EP2016/076773 WO2017108244A1 (fr) 2015-12-22 2016-11-07 Injecteur de carburant

Publications (1)

Publication Number Publication Date
EP3394418A1 true EP3394418A1 (fr) 2018-10-31

Family

ID=57256292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16793833.1A Withdrawn EP3394418A1 (fr) 2015-12-22 2016-11-07 Injecteur de carburant

Country Status (5)

Country Link
US (1) US10746144B2 (fr)
EP (1) EP3394418A1 (fr)
CN (1) CN108431396B (fr)
DE (1) DE102015226514A1 (fr)
WO (1) WO2017108244A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017218869A1 (de) * 2017-10-23 2019-04-25 Robert Bosch Gmbh Injektor
DE102018207655A1 (de) * 2018-05-16 2019-11-21 Robert Bosch Gmbh Verfahren zum Betreiben eines Kraftstoffinjektors
DE102018221135A1 (de) * 2018-12-06 2020-06-10 Robert Bosch Gmbh Verfahren zum Betreiben eines Kraftstoffeinspritzsystems, Steuereinheit sowie Kraftstoffeinspritzsystem mit einer Steuereinheit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014206210A1 (de) * 2014-04-01 2015-10-01 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669334A (en) 1994-02-11 1997-09-23 Mtu Motoren-Und Turbinen-Union Friedrichshafen Gmbh Injection valves for liquid-fuel mixtures and associated processes
EP2038540A1 (fr) * 2006-06-29 2009-03-25 The University of British Columbia Injection simultanée de combustibles liquide et gazeux dans un moteur
JP4297181B2 (ja) * 2007-07-17 2009-07-15 株式会社デンソー インジェクタ
JP2010059860A (ja) * 2008-09-03 2010-03-18 Nippon Soken Inc 内燃機関の燃料噴射装置
US20120097127A1 (en) * 2010-10-25 2012-04-26 Joseph Carl Firey Separate igniter fuel injection system
CA2743043C (fr) * 2011-06-14 2012-09-18 Westport Power Inc. Soupape d'injection de carburants mixtes
US8733326B2 (en) * 2011-06-24 2014-05-27 Caterpillar Inc. Dual fuel injector for a common rail system
DE102013014329B4 (de) 2013-08-07 2017-03-23 L'orange Gmbh Brennverfahren für eine Brennkraftmaschine
DE102014225392A1 (de) 2014-12-10 2016-06-16 Robert Bosch Gmbh Düsenbaugruppe für einen Kraftstoffinjektor sowie Kraftstoffinjektor
CA2884945C (fr) * 2015-03-13 2018-02-27 Michael C. Wickstone Injecteur pour carburant gazeux a actionnement hydraulique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014206210A1 (de) * 2014-04-01 2015-10-01 Robert Bosch Gmbh Kraftstoffinjektor

Also Published As

Publication number Publication date
DE102015226514A1 (de) 2017-06-22
CN108431396A (zh) 2018-08-21
US20190017476A1 (en) 2019-01-17
CN108431396B (zh) 2021-03-26
US10746144B2 (en) 2020-08-18
WO2017108244A1 (fr) 2017-06-29

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