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EP2893182B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
EP2893182B1
EP2893182B1 EP13739435.9A EP13739435A EP2893182B1 EP 2893182 B1 EP2893182 B1 EP 2893182B1 EP 13739435 A EP13739435 A EP 13739435A EP 2893182 B1 EP2893182 B1 EP 2893182B1
Authority
EP
European Patent Office
Prior art keywords
stop
guide element
injection valve
valve needle
valve according
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.)
Not-in-force
Application number
EP13739435.9A
Other languages
German (de)
English (en)
Other versions
EP2893182A1 (fr
Inventor
Philipp Rogler
Martin Scheffel
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 EP2893182A1 publication Critical patent/EP2893182A1/fr
Application granted granted Critical
Publication of EP2893182B1 publication Critical patent/EP2893182B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/0671—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
    • F02M51/0675—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not 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
    • 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies

Definitions

  • the present invention relates to an injection valve for injecting a medium, in particular for injecting fuel in a combustion chamber.
  • valves for the injection of gasoline with a valve needle which is moved by an actuator, such as an electromagnet or piezo actuator, against a closing spring so that a desired amount of fuel is introduced directly targeted into the combustion chamber.
  • an injection valve is considered in which the armature is decoupled from the valve needle.
  • the armature should release itself quickly from the lower stop located on the valve needle, quickly overcome the armature free travel and quickly open the valve when hitting the upper stop. If the energization of the valve is terminated, the valve needle closes again. The armature, after the valve needle closes the valve seat, continues to move until it encounters the lower limit stop.
  • the armature bounces off one or more times if necessary, until it reaches its rest position again.
  • the time it takes for the armature to return to the rest position is critical to the ability of the valve to rapidly eject successive injections with high accuracy.
  • the injection valve according to the invention with the features of claim 1 allows a very fast recovery of the armature after closing the valve by an improved damping. This can do that Inject injection valve very precisely in quick succession.
  • the Ankerfreiweg is still adjustable.
  • the switching behavior and the quantitative metering of the injection valve are standardized and the actual values thus deviate as little as possible from the nominal value.
  • the costs for producing the valve needle can be reduced because the armature according to the invention is no longer guided on the valve needle, but on the guide element.
  • the valve needle therefore no longer has to be micromachined. It eliminates, for example, a grinding of the valve needle or it can be used without further reworking a rolled or drawn needle pin.
  • the injection valve which is used in particular for gasoline engines for duct or direct injection of fuel.
  • the injection valve comprises a housing with at least one injection opening on an outlet side, a magnetic coil and a magnetic armature that is linearly movable by the magnetic coil. Furthermore, a linearly movable valve needle for opening and closing the injection opening is provided.
  • the armature is linearly movable between a first stop and a second stop coaxial with the valve needle.
  • the valve needle is firmly connected to the guide element.
  • the outer surface of the guide element serves as a guide for the Linearbewegegung of the armature.
  • the second stop is an integral part of the guide element.
  • the guide of the magnet armature is formed integrally with the second stop.
  • the first stop is on the outlet side facing away from the armature and can thus be referred to as the upper stop.
  • the second stop is on the outlet side facing the armature and can thus be referred to as a lower stop.
  • a nip is defined between the armature and the second stop.
  • this nip there is the medium to be injected, so that the nip attenuates the movement of the armature when closing the injector and quickly restores the armature to its rest position.
  • the effectiveness of the nip depends on the minimum gap height of the nip.
  • the second stop is formed on a stop sleeve.
  • the stop sleeve in turn is welded to the valve needle.
  • the guide element, on which the second stop is formed is simultaneously used to guide the magnet armature. As a result, a predetermined angle between the second stop and the guide surface of the armature is fixed and remains unchanged even during the welding process.
  • the guide element is preferably designed as a plugged onto the valve needle sleeve.
  • the guide element extends as a solid body, the valve needle in the longitudinal direction.
  • the first stopper formed on a ring is attached to the guide element.
  • the ring is welded to the guide element. The distance between the two stops minus the height of the armature defines the armature free travel. This is set by positioning the ring on the guide element.
  • the ring is preferably designed in cross-section L-shaped.
  • the welding between the ring and guide element is preferably carried out on the side facing away from the outlet of the first stop.
  • the guide element is preferably welded to the valve needle.
  • the weld is preferably set only on the side facing the outlet of the second stop.
  • the guide element is made together with the second stop as a one-piece turned or milled part.
  • the second stop is perpendicular from the guide element.
  • the guide element has in particular a cylindrical outer surface on which the magnet armature is guided.
  • FIGS. 1 and 2 an injection valve 1 according to the first embodiment explained in detail. Identical or functionally identical components are provided with the same reference numerals in all embodiments.
  • the injection valve 1 comprises a housing 2.
  • the housing 2 is in FIG. 1 only partially and schematically shown. At least one injection opening 4 in the housing 2 is formed on an outlet side 3 of the injection valve 1. Furthermore, the housing 2 carries a magnetic coil 5.
  • the injection valve 1 further comprises a magnet armature 6 and a valve needle 7 with a ball 8.
  • the magnet armature 6 is linearly movable along a longitudinal axis 23 between a first stop 11 and a second stop 12. The distance between the two stops 11, 12 defines a Ankerokweg 13.
  • a first spring 9 loads the valve needle 7 in the direction of the outlet side 3.
  • a second spring 12 is connected via a spring cup 14 to the armature 6.
  • the second spring 10 also loads the magnet armature 6 via the spring cup 14 in the direction of the outlet side 3, so that the armature 6 rests against the second stop 12 by the force of the second spring 10.
  • channels 15 are formed. Through the channels 15 of the fuel to be injected can flow. Additionally or alternatively to the channels 15 and the valve needle 7 may be formed as a hollow needle.
  • FIG. 2 shows a detail of the injection valve 1. Based on FIG. 2 It is good to see that on the valve needle 7, a guide element 16, formed as a sleeve 16, inserted. An integral part of the guide member 16 is the second stop 12. The guide member 16 together with the second stop 12 is made as a one-piece rotary member. The guide element 16 extends over a guide element length 21. The magnet armature 6 extends over a magnet armature length 22. The lengths are measured parallel to the longitudinal axis 23. The guide element length 21 is substantially longer than the magnet armature length 22. As a result, the guide element 16 with its outer surface 18 completely guide the magnet armature 6. Due to the integral design of the second stop 12 on the guide element 16, a defined angle, in particular of 90 °, between the outer surface 18 and the second stop 12 is given.
  • the guide member 16 On the guide member 16 is a ring 17. At the ring 17, the first stop 11 is formed.
  • the ring 17 is L-shaped in cross section.
  • the ring 17 is connected via a first weld 19 with the guide member 16.
  • the guide element 16 in turn is connected to the valve needle 7 with a second weld 20.
  • Fig. 3 shows a detail of a second embodiment.
  • the guide member 16 is not formed as a sleeve, but as a solid body.
  • the valve needle 7 terminates below the guide element 16.
  • the guide element 16 extends the valve needle 7 along the longitudinal axis 23 at least to the ring 17.
  • the guide element 16 thus combines the guiding and stop function.
  • the embodiments can be constructed with a hollow or with a solid valve needle 7, which generally does not have to be symmetrical.
  • the guide member 16 is configured so that the serving for guiding outer surface 18 and the rectangular surface of the second stop 12 made in one setting, for example, rotated and / or ground can be.
  • the welds 19, 20 are preferably so far away from the guide and stop surface that these surfaces are not distorted by the welding process.

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)

Claims (10)

  1. Soupape d'injection (1) pour l'injection d'un fluide, en particulier pour l'injection de carburant dans une chambre de combustion, comprenant :
    - un boîtier (2) comprenant au moins une ouverture d'injection (4) au niveau d'un côté de sortie (3),
    - une bobine magnétique (5),
    - un induit magnétique (6) déplaçable linéairement par la bobine magnétique (5),
    - un pointeau de soupape (7) déplaçable linéairement pour ouvrir et fermer l'ouverture d'injection (4),
    - une première butée (11) sur un côté de l'induit magnétique (6) opposé à la sortie et une deuxième butée (12) sur un côté de l'induit magnétique (6) tourné vers la sortie, l'induit magnétique (6) étant déplaçable linéairement entre la première butée (11) et la deuxième butée (12) par rapport au pointeau de soupape (7), et
    - un élément de guidage (16) assemblé au pointeau de soupape (7), une surface extérieure (18) de l'élément de guidage (16) servant de guidage pour le déplacement linéaire de l'induit magnétique (6), et la deuxième butée (12) faisant partie intégrante de l'élément de guidage (16).
  2. Soupape d'injection selon la revendication 1, caractérisée en ce que la première butée (11) est réalisée au niveau d'une bague (17), la bague (17) étant enfichée sur l'élément de guidage (16).
  3. Soupape d'injection selon la revendication 2, caractérisée en ce que la bague (17) est soudée à l'élément de guidage (16).
  4. Soupape d'injection selon l'une quelconque des revendications 2 ou 3, caractérisée en ce que la bague (17) présente une section transversale en forme de L.
  5. Soupape d'injection selon l'une quelconque des revendications 3 ou 4, caractérisée en ce que la bague (17) est soudée à l'élément de guidage (16) seulement sur le côté de la première butée (11) opposé à la sortie.
  6. Soupape d'injection selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de guidage (16) est soudé au pointeau de soupape (7).
  7. Soupape d'injection selon la revendication 6, caractérisée en ce que l'élément de guidage (16) est soudé au pointeau de soupape (7) seulement sur le côté de la deuxième butée (12) opposé à la sortie.
  8. Soupape d'injection selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de guidage (16) est fabriqué conjointement avec la deuxième butée (12) sous forme de pièce tournée ou fraisée d'une seule pièce.
  9. Soupape d'injection selon l'une quelconque des revendications précédentes, caractérisée en ce que la deuxième butée (12) fait saillie à angle droit depuis l'élément de guidage (16).
  10. Soupape d'injection selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de guidage (15) est réalisé sous forme de douille enfichée sur le pointeau de soupape (7) ou en ce que l'élément de guidage (15) est réalisé sous forme d'élément prolongeant le pointeau de soupape (7).
EP13739435.9A 2012-09-06 2013-07-22 Soupape d'injection Not-in-force EP2893182B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012215779.4A DE102012215779A1 (de) 2012-09-06 2012-09-06 Einspritzventil
PCT/EP2013/065372 WO2014037142A1 (fr) 2012-09-06 2013-07-22 Soupape d'injection

Publications (2)

Publication Number Publication Date
EP2893182A1 EP2893182A1 (fr) 2015-07-15
EP2893182B1 true EP2893182B1 (fr) 2016-09-14

Family

ID=48808356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13739435.9A Not-in-force EP2893182B1 (fr) 2012-09-06 2013-07-22 Soupape d'injection

Country Status (6)

Country Link
US (1) US9518542B2 (fr)
EP (1) EP2893182B1 (fr)
JP (1) JP6111334B2 (fr)
KR (1) KR102116698B1 (fr)
DE (1) DE102012215779A1 (fr)
WO (1) WO2014037142A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170254304A1 (en) * 2014-09-17 2017-09-07 Denso Corporation Fuel injection valve
JP6544416B2 (ja) * 2017-12-06 2019-07-17 株式会社デンソー 燃料噴射弁
DE102018201951A1 (de) * 2018-02-08 2019-08-08 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19849210A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
US6123275A (en) * 1999-08-12 2000-09-26 Delphi Technologies, Inc. Dual gap fuel injector
DE19946602A1 (de) * 1999-09-29 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19957172A1 (de) * 1999-11-27 2001-08-09 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10036811A1 (de) * 2000-07-28 2002-02-07 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10046304C1 (de) * 2000-09-19 2002-06-06 Bosch Gmbh Robert Verfahren zum Herstellen eines Ventilsitzkörpers eines Brennstoffeinspritzventils
DE10108945A1 (de) * 2001-02-24 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10140795A1 (de) * 2001-08-20 2003-03-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102004024533A1 (de) * 2004-05-18 2005-12-15 Robert Bosch Gmbh Brennstoffeinspritzventil
JP2006017101A (ja) 2004-06-02 2006-01-19 Denso Corp 燃料噴射弁
KR100562874B1 (ko) 2005-01-19 2006-03-23 주식회사 마이크로게이트 전자나침반용 수직축 박막 플럭스게이트 소자의 조립 방법
KR100950676B1 (ko) 2008-01-07 2010-03-31 에스티에스반도체통신 주식회사 3축 지자기 센서 및 그 제조 방법
JP4637931B2 (ja) * 2008-05-22 2011-02-23 三菱電機株式会社 燃料噴射弁
JP4637930B2 (ja) * 2008-05-22 2011-02-23 三菱電機株式会社 燃料噴射弁
JP4588782B2 (ja) * 2008-10-16 2010-12-01 三菱電機株式会社 燃料噴射弁及びその製造方法
US9664161B2 (en) * 2011-10-26 2017-05-30 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve

Also Published As

Publication number Publication date
JP2015526646A (ja) 2015-09-10
KR102116698B1 (ko) 2020-06-01
DE102012215779A1 (de) 2014-03-06
US20150240765A1 (en) 2015-08-27
EP2893182A1 (fr) 2015-07-15
JP6111334B2 (ja) 2017-04-05
KR20150048145A (ko) 2015-05-06
WO2014037142A1 (fr) 2014-03-13
US9518542B2 (en) 2016-12-13

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