EP1364117B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1364117B1
EP1364117B1 EP02717971A EP02717971A EP1364117B1 EP 1364117 B1 EP1364117 B1 EP 1364117B1 EP 02717971 A EP02717971 A EP 02717971A EP 02717971 A EP02717971 A EP 02717971A EP 1364117 B1 EP1364117 B1 EP 1364117B1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injection
clamping sleeve
injection valve
valve needle
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.)
Expired - Lifetime
Application number
EP02717971A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1364117A1 (de
Inventor
Ferdinand Reiter
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 EP1364117A1 publication Critical patent/EP1364117A1/de
Application granted granted Critical
Publication of EP1364117B1 publication Critical patent/EP1364117B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention is based on a fuel injection valve according to the preamble of independent claim 1.
  • a fuel injection valve for fuel injection systems of internal combustion engines which has a magnetic coil, an acted upon by the solenoid coil in a stroke direction against a return spring and an associated with a valve closing member valve needle.
  • the armature is movable between a first stop connected to the valve needle and limiting the movement of the armature in the stroke direction, and a second stop connected to the valve needle and limiting the movement of the armature against the stroke direction.
  • a damping spring in the form of a plate spring is arranged.
  • a disadvantage of the fuel injection valve known from DE 198 49 210 A1 on the one hand, that the manufacturing and assembly costs are increased by at least one additional component. On the other hand, it can be offset, for example, by obliquely inserting the disc spring or by the manufacturing tolerances occurring during production or to tilt the armature during operation of the fuel injector. The result is large variations in the Ankerkeweg or in the height of the Vorhubspalts. Both factors can lead to malfunction in the operation of the fuel injection valve.
  • the fuel injection valve according to the invention with the characterizing features of the independent claim has the advantage that a forward stroke of the armature can be adjusted very precisely and without damage to the components used by a can be pushed onto the valve needle and arbitrarily positionable clamping sleeve with little effort.
  • a particular advantage is that a lateral slot in the clamping sleeve allows easy assembly by a resilient bias of the tubular member, wherein the clamping force of the clamping sleeve is selected by its axial length to match the weight of the armature.
  • a particular advantage is that the production of the overall component can be done quickly and inexpensively, since the clamping sleeve and the intermediate ring are easy to produce and no other components are needed.
  • the fuel injection valve 1 is embodied in the form of a fuel injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with a Valve-closing body 4, which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 and are based on a connecting member 29 from.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the dial 15 there is an armature 20. This is connected via a Mitauerflansch 21 non-positively with the valve needle 3 in connection, which is connected by a weld 22 with the Mit psychologyflansch 21.
  • a return spring 23 On the Mitauerflansch 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • a clamping sleeve 31 which is mounted on the valve needle 3, serves as a lower anchor stop.
  • An intermediate ring 32 which rests on the clamping sleeve 31, avoids bouncing when closing the fuel injection valve 1.
  • FIGS. 2A and 2B A detailed illustration of the clamping sleeve 31 can be seen in FIGS. 2A and 2B.
  • the armature 20 and the valve seat body 5 run fuel channels 30a to 30c, which conduct the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the injection opening 7.
  • the fuel injection valve 1 is sealed by a seal 28 against a distribution line, not shown.
  • the Mit supportiveflansch 21 is acted upon the valve needle 3 by the return spring 23 against its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement.
  • the armature 20 rests on the intermediate ring 32, which is supported on the clamping sleeve 31.
  • This 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 of the armature 20 is divided into a forward stroke, which serves to close a Vorhubspalts 38, and an opening stroke, which is determined by a in the rest position between the inner pole 13 and the armature 20 working gap 27.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the Mit supportiveflansch 21 from the inner pole 13, whereby the valve needle 3 moves against the stroke direction.
  • the valve closing body 4 is seated on the valve seat surface 6, and the fuel injection valve 1 is closed.
  • the armature 20 is seated on the clamping sleeve 31 or on the intermediate ring 32.
  • FIG. 2A shows an excerpt from the section IIA in FIG Inventive designed fuel injector 1. Matching components are provided in all figures with matching reference numerals.
  • the lower anchor stop is formed by the clamping sleeve 31 or the intermediate ring 32 pushed onto the valve needle 3.
  • the intermediate ring 32 serves on the one hand to compensate for inaccuracies in the surface of an inlet end 34 of the clamping sleeve 31, on the other hand as a damper against Ankerpreller when closing the fuel injector 1. Bounces namely the armature 20 when closing at the inlet end 34 of the clamping sleeve 31, could it comes through the reversal of movement of the armature 20 lack of damping to another, unwanted short-term opening stroke.
  • a plate spring 39 may be provided to press the armature 20 in the de-energized state against the intermediate ring 32.
  • the clamping sleeve 31 is such that a damage-free mounting on the valve needle 3 is possible.
  • the clamping sleeve 31 at its inflow-side end 34 as well as at a drain-side end 35 on a radially inner wall 36 bevels 37 and chamfers, which are for example wedge-shaped, conical and prevent 31 during the assembly of the clamping sleeve Materialabspan with subsequent contamination of the valve interior and malfunction of the fuel injection valve 1 by clogging of the fuel channels 30b and 30c or the injection port 7 occur.
  • the clamping sleeve 31 must be fixed to the valve needle 3 so that it can withstand the impact force due to the inertial mass of the armature 20.
  • the clamping force can be adjusted as required by the slotted shape of the clamping sleeve 31 over the axial length of the clamping sleeve 31, since the frictional forces between the valve needle 3 and the inner wall 36 of the clamping sleeve 31 depends on the size of the common contact surface.
  • clamping sleeve 31 is made of an alloy of soft metals, such as a copper-tin alloy.
  • a possible such delivery would be z. B. CuSn 6 .
  • FIG. 2B shows a section through the detail shown in FIG. 2A from the fuel injection valve 1 designed according to the invention along the line IIB-IIB.
  • the clamping sleeve 31 has a slot 33 which ensures that the clamping sleeve 31 on the one hand easily and without damage to the valve needle 3 can be pushed, and on the other hand by the resulting bias for a reliable fixation of the clamping sleeve 31 in the each selected position on the valve needle 3 provides.
  • the position of the clamping sleeve 31 and thus the height of the Vorhubspalts 38 can be easily adjusted.
  • the plan view of the inlet-side end 34 of the clamping sleeve 31 again shows the chamfer or bevel 37, which is wedge-shaped, conical in the present embodiment and extends over the entire circumference of the clamping sleeve 31 outside of the slot 33.
  • the invention is not limited to the illustrated embodiment and also for other forms of anchors 20, for example, for immersion and flat anchors, as well as any designs of fuel injectors 1 applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02717971A 2001-02-24 2002-02-25 Brennstoffeinspritzventil Expired - Lifetime EP1364117B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10108974 2001-02-24
DE10108974A DE10108974A1 (de) 2001-02-24 2001-02-24 Brennstoffeinspritzventil
PCT/DE2002/000662 WO2002068811A1 (de) 2001-02-24 2002-02-25 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1364117A1 EP1364117A1 (de) 2003-11-26
EP1364117B1 true EP1364117B1 (de) 2006-08-09

Family

ID=7675379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02717971A Expired - Lifetime EP1364117B1 (de) 2001-02-24 2002-02-25 Brennstoffeinspritzventil

Country Status (7)

Country Link
US (1) US6742726B2 (pt)
EP (1) EP1364117B1 (pt)
JP (1) JP2004518859A (pt)
BR (1) BR0204226A (pt)
CZ (1) CZ20023493A3 (pt)
DE (2) DE10108974A1 (pt)
WO (1) WO2002068811A1 (pt)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256948A1 (de) * 2002-12-05 2004-06-24 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10345967B4 (de) * 2003-10-02 2014-02-27 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005017267A1 (de) * 2005-04-14 2006-10-19 Robert Bosch Gmbh Vormontierte Ankergruppe für Common Rail Injektor
US20080295806A1 (en) * 2007-06-04 2008-12-04 Caterpillar Inc. Heat conducting sleeve for a fuel injector
US7946276B2 (en) * 2008-03-31 2011-05-24 Caterpillar Inc. Protection device for a solenoid operated valve assembly
JP4637930B2 (ja) 2008-05-22 2011-02-23 三菱電機株式会社 燃料噴射弁
US20100038458A1 (en) * 2008-08-12 2010-02-18 Bircann Raul A Fuel injector having an energy attenuator sub-assembly for the valve seat
EP2336544A1 (en) * 2009-12-14 2011-06-22 Delphi Technologies, Inc. Anti-bounce mechanism for fuel injectors
JP5488120B2 (ja) * 2010-03-30 2014-05-14 株式会社デンソー 燃料噴射弁
US8556194B2 (en) * 2010-06-23 2013-10-15 Delphi Technologies, Inc. Fuel injector
JP5939667B2 (ja) 2012-02-24 2016-06-22 株式会社ケーヒン 電磁式燃料噴射弁
DE102012210415A1 (de) * 2012-06-20 2013-12-24 Robert Bosch Gmbh Einspritzventil
DE102012217322A1 (de) * 2012-09-25 2014-06-12 Robert Bosch Gmbh Einspritzventil
EP2860386A1 (en) * 2013-10-10 2015-04-15 Continental Automotive GmbH Injector for a combustion engine
EP2949917B1 (en) * 2014-05-27 2017-01-04 Continental Automotive GmbH Fuel injector
EP2985445A1 (en) * 2014-08-14 2016-02-17 Continental Automotive GmbH Solenoid actuated fluid injection valve
EP3156638B1 (en) * 2015-10-14 2020-03-18 Vitesco Technologies GmbH Fuel injector
DE102017207273A1 (de) * 2016-06-30 2018-01-04 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102017218764A1 (de) * 2017-10-20 2019-04-25 Robert Bosch Gmbh Magnetventil zum Steuern von Fluiden
DE102018200364A1 (de) * 2018-01-11 2019-07-11 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102018201951A1 (de) * 2018-02-08 2019-08-08 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102019201087A1 (de) * 2019-01-29 2020-07-30 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids und Brennstoffeinspritzanlage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1541458A (fr) * 1966-10-20 1968-10-04 Bosch Gmbh Robert Soupape d'injection de carburant actionnée électromagnétiquement pour moteurs à combustion interne
US4342427A (en) * 1980-07-21 1982-08-03 General Motors Corporation Electromagnetic fuel injector
DE3814765A1 (de) * 1988-04-30 1989-11-09 Messerschmitt Boelkow Blohm Magnetventil
DE19708104A1 (de) 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil
IT1296144B1 (it) * 1997-11-18 1999-06-09 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna.
DE19816315A1 (de) 1998-04-11 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19849210A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19853091A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19855547A1 (de) * 1998-12-02 2000-06-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE19927900A1 (de) 1999-06-18 2000-12-21 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE50207789D1 (de) 2006-09-21
WO2002068811A1 (de) 2002-09-06
US20030155440A1 (en) 2003-08-21
US6742726B2 (en) 2004-06-01
EP1364117A1 (de) 2003-11-26
DE10108974A1 (de) 2002-09-05
CZ20023493A3 (en) 2004-05-12
BR0204226A (pt) 2003-02-18
JP2004518859A (ja) 2004-06-24

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