EP1402171A1 - Soupape d'injection de carburant et procede de reglage - Google Patents

Soupape d'injection de carburant et procede de reglage

Info

Publication number
EP1402171A1
EP1402171A1 EP02742720A EP02742720A EP1402171A1 EP 1402171 A1 EP1402171 A1 EP 1402171A1 EP 02742720 A EP02742720 A EP 02742720A EP 02742720 A EP02742720 A EP 02742720A EP 1402171 A1 EP1402171 A1 EP 1402171A1
Authority
EP
European Patent Office
Prior art keywords
flow rate
fuel
sleeve
adjusting sleeve
fuel injection
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.)
Granted
Application number
EP02742720A
Other languages
German (de)
English (en)
Other versions
EP1402171B1 (fr
Inventor
Heinz Luft
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 EP1402171A1 publication Critical patent/EP1402171A1/fr
Application granted granted Critical
Publication of EP1402171B1 publication Critical patent/EP1402171B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of claim 1 and a method for adjusting a fuel injector according to the preamble of claim 9.
  • AI proposes a fuel injector or a method for adjusting the dynamic medium flow quantity of a fuel injector, in which an adjusting sleeve having a longitudinal slot is pressed into a longitudinal bore of a connecting piece up to a predetermined press-in depth, the dynamic actual medium.
  • the quantity of the valve is measured and compared with a target quantity of medium and the pressed-in adjusting sleeve, which is under a tension acting in the radial direction, is advanced until the actual quantity of medium measured matches the predetermined target quantity of medium.
  • valve housing is deformed by the engagement of a deformation tool on the outer circumference of the valve housing in order to adjust the dynamic medium flow rate of a fuel injector.
  • the size of the residual air gap between the core and the armature changes, and thus the magnetic force, so that the medium flow rate can be influenced and adjusted.
  • a disadvantage of the group of methods that influence the size of the magnetic flux in the magnetic circuit is, in particular, the high outlay in terms of Manufacturing costs because the required static flow tolerances must be guaranteed, which is difficult to achieve.
  • the measurements of the magnetic fields are complex and usually require costly methods and a test field.
  • a disadvantage of the group of mechanical setting methods is, in particular, the high degree of inaccuracy to which these methods are subject.
  • the opening and closing times of a fuel injector can only be shortened at the expense of electrical power, which increases the electrical load on the components and puts more strain on the control units.
  • the fuel injector according to the invention with the characterizing features of claim 1 and the method according to the invention with the characterizing features of claim 9 has the advantage that eccentric bores in the bottoms of the adjusting sleeve and in the inner sleeve used therein for adjusting the dynamic flow rate depending on the desired amount of fuel can be brought to cover to different degrees to a resulting orifice cross-section without influencing the setting of the static flow and vice versa.
  • adjusting sleeve and the inner sleeve are simple and inexpensive to manufacture.
  • the inner sleeve is advantageously fixed in the adjusting sleeve by means of a snap ring, as a result of which an adjustment of the inner sleeve and thus a change in the resulting diaphragm cross section during the operation of the
  • Fuel injection valve is avoided.
  • the static flow rate is set safely.
  • Fig. 1 shows a schematic section through
  • FIG. 2 shows an excerpted schematic section through the in FIG. 1 illustrated embodiment of a fuel injector according to the invention in area II in Fig. 1, and
  • FIG. 3 shows an excerpt of a schematic cross section through the adjusting sleeve of the fuel injection valve according to the invention along the line III-III in FIG. 2.
  • FIG. 1 An exemplary embodiment of a fuel injection valve 1 according to the invention shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • fuel injector 1 is a fuel injector 1 that opens inward and has a spray opening 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12 which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a constriction 26 and connected to one another by a non-ferromagnetic connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is one Surround plastic sheath 18, which may be molded onto the inner pole 13.
  • the valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disk 15 is used for stroke adjustment.
  • the armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected to the valve needle 3 in via a first flange 21 Connection, which is connected to the first flange 21 by a weld seam 22.
  • a return spring 23 is supported on the first flange 21 and, in the present design of the fuel injector 1, is preloaded by an adjusting sleeve 24.
  • the position of the adjusting sleeve 24 is responsible for the bias of the return spring 23 and thus for the dynamic flow rate through the fuel injector 1.
  • an inner sleeve 34 is provided according to the invention, which is inserted into the adjusting sleeve 24.
  • the inner sleeve 34 is pot-shaped and has an eccentric bore 36 in a bottom 35 of the inner sleeve 34.
  • the adjusting sleeve 24 is also pot-shaped and is also provided in an bottom 37 of the adjusting sleeve 24 with an eccentric bore 38.
  • the eccentric holes 36 and 38 are mounted so that they cover; can be brought.
  • Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and on the valve seat body 5.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
  • An annular damping element 32 which consists of an elastomer material, is arranged on the spray-side side of the armature 20. It rests on a second flange 31 which is non-positively connected to "valve needle 3 via a weld seam 33.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20.
  • the armature 20 also takes the first flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the valve closing body 4 connected to the valve needle 3 lifts off the valve seat surface 6 and the fuel is sprayed through the spray opening 7.
  • FIG. 2 shows an excerpted sectional illustration of the detail designated II in FIG. 1 of the fuel injection valve 1 designed according to the invention without the filter element 25, which is arranged in the central fuel feed 16 in FIG. 1.
  • the adjusting sleeve 24 has a base 37 with an eccentrically arranged bore 38.
  • An inner sleeve 34 is arranged in the adjusting sleeve 24, which is also pot-shaped with a bottom 35 in which an eccentric bore 36 is made.
  • the inner sleeve 34 is dimensioned such that it can be fixed in the adjusting sleeve 24 by means of a snap ring 39.
  • the adjusting sleeve 24 is correspondingly slotted to allow the assembly of the inner sleeve 34 with the snap ring 39.
  • the snap ring 39 ensures that the inner sleeve 34 cannot rotate automatically during the operation of the fuel injector 1, so that the flow does not change. The flow rate is accordingly adjusted against the holding force of the snap ring 39.
  • the eccentric bores 36 and 38 are aligned in the bottoms 35 and 37 so that they have a common axis.
  • the inner sleeve 34 has an engagement surface 40 for a so corresponding tool, for example a polygonal on, • by means of which the inner sleeve 34 is rotatable.
  • the dynamic and • the static flow through the fuel injection valve 1 are set with the aid of the adjusting sleeve 24 and the inner sleeve 34.
  • the adjusting sleeve 24 is first pressed into the fuel injection valve 1 until a desired value of the dynamic flow is reached by a corresponding tension of the return spring 23.
  • the inner sleeve 34 is then made by means of the above-mentioned tool, which acts on the engagement surface 40 rotated relative to the adjusting sleeve 24 until an aperture cross-section 41 is reached through the overlapping eccentric bores 36 and 38, which restricts the static flow rate to a desired value.
  • the static flow rate is variable between an unthrottled value with complete overlap of the bores 36 and 38 and a minimum value with an almost closed orifice cross section 41.
  • a particularly advantageous feature of this arrangement is the possibility of setting the static and dynamic flow through the fuel injection valve 1 independently of one another, so that the work steps described above can also be carried out in the reverse order.
  • FIG. 3 shows a cross section through the adjusting sleeve 24 and the inner sleeve 34, the section being taken along the line III-III in FIG. 2.
  • the static flow through the fuel injection valve 1 is determined via the resulting orifice cross section 41 of the bores 36 and 38 made in the inner sleeve 34 and in the adjusting sleeve 24.
  • 3 shows an exemplary setting for clarification, the bore 38 of the adjusting sleeve 24 being projected into the cutting plane of FIG. 3.
  • the orifice cross section 41 can be changed at any time by removing the filter element 25 from the fuel supply 16 and rotating the inner sleeve 34 with respect to the adjusting sleeve 24 using a suitable tool.
  • the fuel injector 1 does not need to be removed in its entirety, nor do components have to be removed from the fuel injector 1 to adjust the flow rates.
  • the invention is not limited to the illustrated embodiments and z. B. also ' for Fuel injection valves 1 with piezoelectric or magnetostrictive actuators are suitable.

Landscapes

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

Abstract

L'invention concerne une soupape d'injection de carburant (1) destinée à des systèmes d'injection de carburant de moteurs à combustion interne, notamment à l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne. Ladite soupape d'injection de carburant comporte un actionneur (10), un pointeau de soupape (3) relié activement à l'actionneur (10) et actionné dans le sens de fermeture par un ressort de rappel (23) pour l'actionnement d'un obturateur de soupape (4) formant un siège d'étanchéité avec une surface de siège d'étanchéité (6), et une douille de réglage (24) exerçant une précontrainte sur le ressort de rappel (23). Ladite douille de réglage (24) se présente sous la forme d'un pot et comporte dans une base (37) un alésage excentrique (38) présentant une superposition variable avec un alésage excentrique (36) d'une base (35) d'une douille intérieure (34) se présentant également sous la forme d'un pot, pouvant coulisser dans la douille de réglage (24).
EP02742720A 2001-06-22 2002-05-07 Soupape d'injection de carburant et procede de reglage Expired - Lifetime EP1402171B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10130239 2001-06-22
DE10130239A DE10130239A1 (de) 2001-06-22 2001-06-22 Brennstoffeinspritzventil und Verfahren zu dessen Einstellung
PCT/DE2002/001643 WO2003001050A1 (fr) 2001-06-22 2002-05-07 Soupape d'injection de carburant et procede de reglage

Publications (2)

Publication Number Publication Date
EP1402171A1 true EP1402171A1 (fr) 2004-03-31
EP1402171B1 EP1402171B1 (fr) 2004-12-08

Family

ID=7689140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02742720A Expired - Lifetime EP1402171B1 (fr) 2001-06-22 2002-05-07 Soupape d'injection de carburant et procede de reglage

Country Status (6)

Country Link
US (1) US6915960B2 (fr)
EP (1) EP1402171B1 (fr)
JP (1) JP4221287B2 (fr)
KR (1) KR20030036710A (fr)
DE (2) DE10130239A1 (fr)
WO (1) WO2003001050A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10037571A1 (de) * 2000-08-02 2002-02-14 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zu dessen Einstellung
JP5086516B2 (ja) 2002-03-11 2012-11-28 バッテル・メモリアル・インスティチュート 温度制御付きのマイクロチャンネル反応器
JP3975352B2 (ja) * 2002-10-30 2007-09-12 株式会社デンソー 噴射装置の動的流量調整方法
DE102013225834A1 (de) * 2013-12-13 2015-06-18 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102016217415B4 (de) 2016-09-13 2022-02-17 Vitesco Technologies GmbH Verfahren und Vorrichtung zum Kalibrieren von Kraftstoffinjektoren mit Leerhub
DE102018220385A1 (de) * 2018-11-28 2020-05-28 Robert Bosch Gmbh Einspritzventil für ein Wassereinspritzsystem eines Verbrennungsmotors sowie Wassereinspritzsystem mit einem solchen Einspritzventil
US11454200B2 (en) * 2019-11-08 2022-09-27 Delphi Technologies Ip Limited Fuel system with an arrangement which seals between a fuel injector and a fuel rail socket

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Publication number Priority date Publication date Assignee Title
US3387790A (en) * 1967-04-11 1968-06-11 Bosch Arma Corp Fuel injection nozzle
US3398936A (en) * 1966-08-02 1968-08-27 Curtiss Wright Corp Fuel injection pintle
US3567133A (en) * 1968-06-25 1971-03-02 Ambac Ind Pressure adjusting means for fuel injection nozzles
DE2711391A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
GB8709712D0 (en) * 1987-04-24 1987-05-28 Lucas Ind Plc Fuel injection nozzle
DE3735288A1 (de) * 1987-10-17 1989-04-27 Pierburg Gmbh Elektromagnetisches einspritzventil fuer brennkraftmaschinen
JPH01138366A (ja) 1987-11-23 1989-05-31 Nippon Denso Co Ltd 内燃機関用電磁式燃料噴射弁
DE4023828A1 (de) * 1990-07-27 1992-01-30 Bosch Gmbh Robert Verfahren zur einstellung eines ventils und ventil
DE4023826A1 (de) * 1990-07-27 1992-01-30 Bosch Gmbh Robert Verfahren zur einstellung eines ventils und ventil
DE4038142C1 (en) * 1990-11-30 1992-04-09 Pierburg Gmbh, 4040 Neuss, De Fuel injection valve for IC-engine - has spring loaded valve closure with magnetic actuator and throttled duct
DE4109868A1 (de) 1991-03-26 1992-10-01 Bosch Gmbh Robert Einstellbuchse fuer ein elektromagnetisch betaetigbares ventil und verfahren zur herstellung
DE4123787A1 (de) * 1991-07-18 1993-01-21 Bosch Gmbh Robert Verfahren zur einstellung eines brennstoffeinspritzventils und brennstoffeinspritzventil
DE4211723A1 (de) * 1992-04-08 1993-04-15 Bosch Gmbh Robert Verfahren zur herstellung und verfahren zur einstellung eines ventils
DE19512338A1 (de) * 1994-05-10 1995-11-16 Bosch Gmbh Robert Vorrichtung und Verfahren zum Einstellen eines Ventilhubs
DE4431128A1 (de) * 1994-09-01 1996-03-07 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils und Ventil
DE19516513A1 (de) * 1995-05-05 1996-11-07 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils und Ventil
DE19758660B4 (de) * 1997-01-08 2004-01-22 Sonplas Gmbh Verfahren zur Einstellung des Brennstoffdurchflusses von Bauteilöffnungen für Einspritzventile
DE10037571A1 (de) 2000-08-02 2002-02-14 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zu dessen Einstellung
DE10037570A1 (de) 2000-08-02 2002-02-14 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zu dessen Einstellung

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Title
See references of WO03001050A1 *

Also Published As

Publication number Publication date
US6915960B2 (en) 2005-07-12
US20040011898A1 (en) 2004-01-22
DE10130239A1 (de) 2003-01-02
JP4221287B2 (ja) 2009-02-12
EP1402171B1 (fr) 2004-12-08
JP2004521251A (ja) 2004-07-15
KR20030036710A (ko) 2003-05-09
WO2003001050A1 (fr) 2003-01-03
DE50201739D1 (de) 2005-01-13

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