EP1576278A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1576278A1
EP1576278A1 EP03812123A EP03812123A EP1576278A1 EP 1576278 A1 EP1576278 A1 EP 1576278A1 EP 03812123 A EP03812123 A EP 03812123A EP 03812123 A EP03812123 A EP 03812123A EP 1576278 A1 EP1576278 A1 EP 1576278A1
Authority
EP
European Patent Office
Prior art keywords
armature
stop
recess
fuel injection
valve
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Withdrawn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
EP03812123A
Other languages
German (de)
English (en)
Inventor
Wolfgang-Manfred Ruehle
Matthias Boee
Norbert Keim
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 EP1576278A1 publication Critical patent/EP1576278A1/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Withdrawn legal-status Critical Current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
    • 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
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

Definitions

  • the intermediate ring which is made of an elastomer, for example, acts as a damper against armature bumps when the fuel injector closes, which is caused by the magnet armature lagging the valve needle during the closing process, and to shorten the vibration process thereby excited. It also acts as a damping element against the bouncing processes that occur when opening, which causes the valve needle lagging the magnet armature when the second stop body impacts the magnet armature.
  • the intermediate ring also serves to reduce the distance that the valve needle travels in the armature after reaching the upper armature stop.
  • a further disadvantage is that the intermediate ring is an additional component and complicates the production of the fuel injector.
  • the fuel injector according to the invention has the advantage that the hydraulic damping measures between the armature and valve needle or the armature and the armature stops decay the vibrations faster and the necessary paths can be kept shorter.
  • the fuel injection quantity per injection process which is reproducibly minimally possible, can be further reduced, the scatter of the injection quantity between the injection processes and between fuel injection valves of the same type being also reduced.
  • the switching interval between two injections can thereby be significantly reduced, for example from 2 ms to less than 1 ms.
  • the second stop is firmly connected to the valve needle or a shim. This allows the play required for the axial movement of the armature to be set precisely, simply and permanently easily.
  • first and / or second recesses are arranged in the first stop or in the anchor.
  • the hydraulic effectiveness in particular can be easily controlled.
  • the arrangement and the extent of the recesses can be more easily adapted to the spatial and hydraulic conditions.
  • the chamber is partially delimited by the valve needle, since this in particular simplifies the manufacture of the chamber.
  • first and / or the second recess is also circular or ring-shaped, they can be produced particularly advantageously in a simple, accurate and cost-effective manner.
  • FIG. 2 shows an enlarged, schematically illustrated section through a first exemplary embodiment according to the invention of fuel injector 1 in the region of armature 20,
  • Fig. 3 shows an enlarged cal atic section through a second invention Embodiment of the fuel injector 1 in the area of the armature 20 and
  • Embodiment of fuel injector 1 in the area of armature 20 Embodiment of fuel injector 1 in the area of armature 20.
  • FIG. 1 An exemplary embodiment of the invention is described below by way of example. Matching components are provided with matching reference numerals in all figures. Before, however, exemplary embodiments of the invention are described with reference to FIGS. 2 to 4, a better understanding of the measures according to the invention is first made with reference to FIG. 1 a generic
  • 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 surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting washer 15 is used for stroke adjustment.
  • the armature 20 is located on the other side of the adjusting washer 15. This armature is non-positively connected via a first stop 21 to the valve needle 3, which is connected to the first stop by a first joint connection 22 in the form of a weld seam 21 is connected.
  • a restoring spring 23 is supported on the first stop 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • Fuel channels 30, 31 and 32 run in the valve needle guide 14, in the armature 20 and on a guide element 36.
  • 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 rail, not shown, and by a further seal 37, against a cylinder head, not shown.
  • a gap 33 is provided between the armature 20 and a second stop 34, which gap can accommodate an annular damping element (not shown) made of elastomer material.
  • the armature 20 is guided on the valve needle 3 so as to be axially movable between the second stop 34 and the first stop 21.
  • the second stop 34 is in this embodiment of a generic fuel injector 1 is connected to the valve needle 3 via a second joint 35 in the form of a weld.
  • 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 surface 6.
  • the gap 33 is closed, i. H. the armature 20 and the second stop 34 touch each other unless there is an annular damping element in the intermediate layer.
  • an anchor free path 44 shown in greater detail in FIGS.
  • 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.
  • a spring element 38 shown in FIGS. 2 to 4 which engages the first stop 21 and is supported on the armature 20, is further tensioned, which in the rest position presses the armature 20 against the second stop 34 with a prestress and thereby presses against the first stop 21 trained shoulder 40
  • the return spring 23 is also supported on the shoulder 40, the shoulder 40 being arranged on the side of the stop 21 facing away from the armature 20.
  • the spring element 38 shown in FIGS. 2 to 4 is also referred to as an AFW spring or an anchor free travel spring.
  • the armature 20 takes the first stop 21, which is welded to the valve needle 3, after passing through the armature free path 44 shown in FIGS. 2 to 4, likewise in the stroke direction.
  • the valve closing body 4 connected to the valve needle 3 lifts off from the valve seat surface 6, and the fuel passed through the fuel channels 30 to 32 is sprayed off through the spray opening 7.
  • the armature 20 of the magnetic field falls sufficiently decayed by the pressure of the return spring 23 from internal pole 13, whereby the standing with the valve needle 3 2 1 first stopper moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, as a result of which the valve-closure member 4 is seated on the valve seat surface 6 and the fuel injector 1 is closed.
  • FIG. 2 shows an enlarged, schematically illustrated section through a first exemplary embodiment according to the invention of the fuel injector 1 shown in FIG. 1 in the area of the armature 20.
  • FIG. 2 shows the fuel injector 1 in the idle state with the sealing seat closed. 2 clearly shows the spring element 38, which in the illustrated state presses the armature 20 against the second stop 34, which in this exemplary embodiment is connected to the adjusting disk 15, for example.
  • the anchor free path 44 is maximally formed in this state.
  • the first stop 21 engages in a step-shaped second recess 41 arranged on the armature 20, which is partially delimited by the valve needle 3.
  • a chamber 42 is formed at the spray-side end of the second recess 41.
  • a throttle point 43 is formed between the chamber 42 and the side of the armature 20, around which fuel flows around, and which in this exemplary embodiment runs parallel to the longitudinal axis of the valve needle 3 between the armature 20 and the part of the first stop 21 which engages in the recess 41.
  • the width and thus part of the hydraulic effect of the throttle point 43 is determined in particular by the inside diameter of the second recess 41 and the outside diameter of the first stop 21 engaging in the second recess 41. •. The way it works is as follows:
  • the armature 20 5 is moved in the stroke direction, for example by electromagnetic forces, to open the fuel injection valve 1. Since the force of the return spring 23 is greater than that of the spring element 38, the armature 20 initially moves freely, without taking the valve needle 3 with it, in the stroke direction and builds up kinetic energy. After passing through the armature free path 44, that is to say when the end of the first stop 21 facing the armature 20 touches the armature 20 or the second recess 41, the armature 20 takes the first stop 21 and thus the valve needle 3 in the stroke direction until the armature 20 has passed the path defined by the working gap 5 27 and strikes the inner pole 13.
  • the vibration process triggered by the pulse is damped by the hydraulic damping effect of the chamber 42 and the throttle point 43 and is shortened in time and its amplitude is reduced.
  • the fuel injection valve 1 can be actuated again from a vibration-free and stable state after only a short time, as a result of which precisely determinable and exactly reproducible injection quantities can be implemented even with very short actuation intervals.
  • the invention is not limited to the illustrated embodiments and z. B. can also be used for outward opening fuel injection valves.

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)

Abstract

L'invention concerne une soupape d'injection de carburant (1), notamment pour l'injection directe de carburant dans une chambre de combustion d'un moteur à combustion interne. Cette soupape comprend une tige (3), dont l'extrémité côté injection comporte un élément de fermeture (4) qui coopère avec une surface (6) de siège de soupape formée sur un élément de siège de soupape (5) pour créer un siège étanche. La soupape est également pourvue d'un orifice d'injection (7), disposé en aval du siège étanche et doté d'un induit (20) en prise avec la tige (3) de soupape. Cet induit (20) est monté axialement mobile sur la tige (3) de soupape, entre une première butée (21) placée sur la tige (3) et une deuxième butée (34), et il est hydrauliquement amorti au niveau de la première butée (21) par un moyen de pression.
EP03812123A 2002-12-05 2003-08-07 Soupape d'injection de carburant Withdrawn EP1576278A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256948 2002-12-05
DE10256948A DE10256948A1 (de) 2002-12-05 2002-12-05 Brennstoffeinspritzventil
PCT/DE2003/002656 WO2004051073A1 (fr) 2002-12-05 2003-08-07 Soupape d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1576278A1 true EP1576278A1 (fr) 2005-09-21

Family

ID=32336023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03812123A Withdrawn EP1576278A1 (fr) 2002-12-05 2003-08-07 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US20060163390A1 (fr)
EP (1) EP1576278A1 (fr)
JP (1) JP2006509141A (fr)
KR (1) KR20050084098A (fr)
DE (1) DE10256948A1 (fr)
WO (1) WO2004051073A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10318255A1 (de) * 2003-04-23 2004-11-25 Man B & W Diesel Ag Einrichtung zum Reduzieren des Nachspritzens eines Einspritzventils
US8556194B2 (en) * 2010-06-23 2013-10-15 Delphi Technologies, Inc. Fuel injector
US9346074B2 (en) 2010-09-13 2016-05-24 Nordson Corporation Conformal coating applicator and method
EP2436910B1 (fr) 2010-10-01 2017-05-03 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
JP5835421B2 (ja) * 2010-10-05 2015-12-24 株式会社デンソー 燃料噴射弁
JP5537472B2 (ja) 2011-03-10 2014-07-02 日立オートモティブシステムズ株式会社 燃料噴射装置
JP5822269B2 (ja) 2011-11-11 2015-11-24 株式会社ケーヒン 電磁式燃料噴射弁
KR101345431B1 (ko) * 2011-12-09 2013-12-27 주식회사 현대케피코 직분사 연료 인젝터
DE102012210415A1 (de) * 2012-06-20 2013-12-24 Robert Bosch Gmbh Einspritzventil
JP5880358B2 (ja) * 2012-08-30 2016-03-09 トヨタ自動車株式会社 燃料噴射弁
DE102012215448B3 (de) 2012-08-31 2013-12-12 Continental Automotive Gmbh Injektor zur Krafteinspritzung in eine Brennkraftmaschine
DE102013219974B4 (de) 2013-10-02 2019-08-08 Continental Automotive Gmbh Ventilbaugruppe für ein Einspritzventil
JP6063894B2 (ja) * 2014-04-23 2017-01-18 日立オートモティブシステムズ株式会社 燃料噴射装置
DE102015201005A1 (de) * 2015-01-22 2016-07-28 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102015213216A1 (de) 2015-07-15 2017-01-19 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
JP6175475B2 (ja) * 2015-11-20 2017-08-02 株式会社ケーヒン 電磁式燃料噴射弁
DE102015226181A1 (de) 2015-12-21 2017-06-22 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102022213079A1 (de) 2022-12-05 2024-06-06 Robert Bosch Gesellschaft mit beschränkter Haftung Injektor zur dosierten Abgabe von Brennstoff

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3834447A1 (de) * 1988-10-10 1990-04-12 Mesenich Gerhard Elektromagnetisches einspritzventil und verfahren zu dessen herstellung
DE19816315A1 (de) * 1998-04-11 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil
JP2001123907A (ja) * 1999-10-26 2001-05-08 Aisan Ind Co Ltd 燃料噴射弁
DE10039083A1 (de) * 2000-08-10 2002-02-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10043085A1 (de) * 2000-09-01 2002-03-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10108974A1 (de) * 2001-02-24 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10118161B9 (de) * 2001-04-11 2004-09-09 Robert Bosch Gmbh Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004051073A1 *

Also Published As

Publication number Publication date
DE10256948A1 (de) 2004-06-24
KR20050084098A (ko) 2005-08-26
US20060163390A1 (en) 2006-07-27
WO2004051073A1 (fr) 2004-06-17
JP2006509141A (ja) 2006-03-16

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