EP1108137B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1108137B1
EP1108137B1 EP00945543A EP00945543A EP1108137B1 EP 1108137 B1 EP1108137 B1 EP 1108137B1 EP 00945543 A EP00945543 A EP 00945543A EP 00945543 A EP00945543 A EP 00945543A EP 1108137 B1 EP1108137 B1 EP 1108137B1
Authority
EP
European Patent Office
Prior art keywords
valve
actuator
fuel injection
needle
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.)
Expired - Lifetime
Application number
EP00945543A
Other languages
German (de)
English (en)
Other versions
EP1108137A1 (fr
Inventor
Hubert Stier
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 EP1108137A1 publication Critical patent/EP1108137A1/fr
Application granted granted Critical
Publication of EP1108137B1 publication Critical patent/EP1108137B1/fr
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
    • 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
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • resulting fuel injector has one which can be actuated by an actuator by means of a valve needle Valve closing body on that with a valve seat a sealing seat cooperates.
  • the fuel injector has a connection part and a functional part.
  • On the connector is an electrical connector and a Fuel connection provided.
  • the functional part shows the Actuator, a compression spring and a valve seat body on which the valve seat surface is formed. So in that Functional part the whole for actuating the fuel injector required actuator accommodated.
  • When connecting the functional part with the Connection part is an electrical contact pin of the Functional part inserted into a socket of the connecting part, whereby the actuator with the electrical connection of the Connection part is connected. It also becomes a fuel channel of the functional part with a fuel channel Connection part sealed.
  • the fuel injector known from DE 197 12 591 A1 has the following disadvantages. Because the actuator completely pivoted in the opposite of the connector arranged functional part is housed, that Valve housing of the fuel injector bends on. This will introduce the fuel injector in a connecting piece of the internal combustion engine difficult, the fuel injector in particular not inserted into a cylindrical connector can be. In particular, this can Fuel injector is not in a cylindrical Location bore of a cylinder head can be used, such as this is directly in the combustion chamber of an internal combustion engine injecting fuel injectors is required.
  • the arrangement of the electrical connector is the Swivel angle of the fuel injector already at To specify manufacture of the connector. A change in Swivel angle ⁇ can therefore only by changing the Manufacturing process can be achieved. Because the fuel injector divided into connecting part and functional part is, in the functional part the entire Actuator is housed in the this document- invention described only for this special fuel injector.
  • DE 197 03 836 A1 already discloses an electromagnetically actuated injection valve known that for the intake manifold injection in mixture-compression-ignition Internal combustion engines is suitable.
  • the fuel injector has a magnetic circuit on, which is arranged outside a tube housing. With the magnetic circuit is a internal armature activated in the radial direction and the movement similar to one Toggle press converted into an axial stroke.
  • the tube housing is kinked designed to be able to arrange the spray point variably and deep in the intake manifold.
  • a valve needle that is movable at an angle to the alignment of the magnetic circuit acts together with a valve seat. When the solenoid is excited, the Transfer armature movement via spring elements to the valve needle, so that this one can execute desired stroke.
  • the fuel injector according to the invention with the has characteristic features of the main claim in contrast, the advantage that the swivel angle is independent adjusted by the special shape of the valve housing can be, so that the fuel injector universal can be used.
  • the Actuator regardless of the angular position of the Valve needle arranged in the fuel injector be, so that the invention for any fuel injectors suitable.
  • valve seat surface is advantageously on one Valve seat body formed, which on a spherical Connection surface on a valve housing of the fuel injector is applied. This makes the valve seat body and the valve housing on top of each other matched so that only when attaching the Valve seat body on the valve housing of the swivel angle must be determined.
  • valve seat body is concave at the connection surface is trained.
  • valve housing has a recess has, through which the valve needle protrudes, wherein it is particularly advantageous if the cross section of the Recess for stepless adjustment of the swivel angle is larger than the cross section of the valve needle.
  • This allows the manufacture of the valve housing and the Valve seat body regardless of the one to be set Swivel angle take place, the desired swivel angle can be set individually.
  • the Valve seat body with the valve housing through a The weld angle can be connected using the swivel angle low manufacturing costs can be determined.
  • the valve seat body can be used also attached to the valve body with a union nut his.
  • the actuator is advantageously piezoelectric or magnetostrictive, which makes a variable Valve needle stroke of the valve needle and a large Result in operating force.
  • the actuator has a Actuating element acts on the valve needle.
  • the injection-side valve area of the fuel injector be made slim. This is particularly useful when using the fuel injector as an injection valve for direct Injecting fuel into an internal combustion engine because in Area of the mounting piece on the combustion chamber of the Internal combustion engine in general only a small one Installation space is available.
  • valve needle head Valve needle on. It is advantageous that the control side of the actuating element and / or the valve needle head is partially spherical or lenticular. Thereby is independent of the set swivel angle Fit between valve needle and actuator ensured.
  • the actuator has an actuator sealing actuator pot acts on the valve needle. Thereby this results in a compact structure of the fuel injector.
  • An end face of the actuator pot is advantageously located on a valve needle head of the valve needle. It is advantageous it that the end face of the actuator pot and / or the Valve needle head partially spherical or lenticular is trained. This makes it independent of that set swivel angle the fit between the Actuator and the actuator ensured.
  • Fig. 1 shows an axial excerpt Sectional view of a fuel injector according to the invention 1.
  • the fuel injector 1 is used especially for direct fuel injection, especially of gasoline in a combustion chamber mixture-compressing, spark-ignited internal combustion engine as so-called gasoline direct injection valve.
  • the Fuel injection valve 1 according to the invention is suitable however also for other applications.
  • the fuel injector 1 has a front part 2, a middle part 3 and a rear part 4, the together a valve housing 5 of the fuel injector 1 form. It is on the rear part 4 of the fuel injector 1 a fuel connection 6 is formed. The rear part 4 of the fuel injector 1 partially surrounded by a plastic element 7 which an electrical connection 8 is formed, via the an electrical cable to the fuel injector 1 can be connected.
  • an actuator 10 in the middle part 3 of the Control fuel injector 1 is arranged.
  • the Actuator 10 is enclosed by an actuator pot 11, one has elastic, wavy region 12 so that the Actuator pot 11, in particular in the direction of one Longitudinal valve axis 13 is elastically deformable. Besides, will the actuator 10 through the elastic, wavy area 12 applied with a bias.
  • the actuator cup 11 is with a sealing plate 14 on a fastening surface 15 connected. This is an actuator chamber 16 in which the Actuator 10 is located hermetically against an interior 17 of the Fuel injector 1 sealed.
  • the sealing plate 14 has at least one recess 18, which are part of a leading into the interior 17 Fuel line 19a to 19d, 18 is.
  • the actuator 10 acts on the actuator pot 11 Actuator 25 a.
  • the actuating element 25 has a pressure plate 26 which has an enlarged cross section. It also points out Actuator 25 has a section 27, the one has reduced diameter.
  • the actuator 25 will guided by guide elements 28, 29, the slit-shaped Have recesses 30a, 30b, 31a, 31b through which the Fuel from the interior 17 into a fuel chamber 32 flows.
  • FIG. 1 designated II section of the fuel injector 1 received.
  • FIG. 2. 1 and 2 are the same for matching elements same reference numerals used.
  • valve seat body 40 Is on the valve housing 5 of the fuel injector 1 a valve seat body 40 attached, which with a spherical connecting surface 41 on a part-spherical End 42 of the valve housing 5 abuts.
  • the connection of the Valve seat body 40 with the valve housing 5 takes place in this embodiment by a weld 43, the a concavely curved collar 34 of the valve seat body 40 circulates.
  • the valve seat body 40 has a valve seat surface 44, which is connected with a valve needle 45 actuatable valve closing body 46 to a sealing seat interacts.
  • the valve needle 45 is with the Valve closing body 46 and a valve needle head 47 in Embodiment connected in one piece.
  • the Valve closing body 46 is provided with a compression spring 48, via the valve needle head 47 to the valve needle 45 acts, generated closing force against the valve seat surface 44 pressed, the compression spring 48 on the one hand Collar 49 of the valve seat body 40 and the other on one Support surface 50, which is formed on the valve needle head 47 is supported.
  • the fuel injector 1 is actuated via the actuator 10 of the piezoelectric, magnetostrictive or (Electro) magnetically operable.
  • Actuation of the actuator 10 becomes a stroke of the Actuator 25 generates, whereby the valve needle 45th is actuated and the valve closing body 46 of the Valve seat surface 44 lifts, causing fuel from here sprayed outward opening fuel injector 1 becomes.
  • the supply of fuel takes place z. B. about a swirl groove 51 formed on the valve needle 45
  • Action of the actuating element 25 on the valve needle 45 takes place via an end face 52 which is on an arched Surface 53 of the valve needle head 47 of the valve needle 45 is applied.
  • a valve needle axis 54 of the valve needle 45 also closes an axis of the actuator 25 which in this Exemplary embodiment with an axis 55 of the actuator 10 coincides with a pivot angle ⁇ , the Swivel angle ⁇ by pivoting the Valve seat body 40 can be predetermined relative to the valve housing 5 is.
  • the axis of the Actuating element 25 also with the longitudinal valve axis 13 of the fuel injector 1. So that Swivel angle ⁇ can be set as desired, that Valve housing 5 has a recess 56 through which the Valve needle 45 protrudes.
  • the cross section is the Recess 56 larger than the cross section of valve needle 45 educated.
  • valve seat body 40 Before the valve seat body 40 with the front Part 2 of the valve housing 5 through the weld 43 is connected, the valve seat body 40 as desired the connection surface 41 at the end of the valve housing 5 be moved so that the swivel angle ⁇ is stepless can be adjusted. Since the valve seat body 40 on the Connection surface 41 is concave, is located the fulcrum inside the fuel injector 1, whereby the valve needle head 47 essentially on remains in place, the surface 53 of the Partial spherical valve needle head 47 on the plane Front side 52 of the actuator 25 rolls and through the partially spherical design of the valve needle head 47 a functional concern of the Valve needle head 47 on the end face 52 of the Actuator 25 is given.
  • Valve seat body 40 After setting the swivel angle ⁇ , the Valve seat body 40 through the weld 43 on the Valve housing 25 are attached. This attachment can also different, e.g. B. achieved with a union nut become.
  • FIG. 3 shows an alternative embodiment of the in Fig. 1 with II designated details. Already described Elements are provided with the same reference symbols, so that a repetitive description is unnecessary.
  • the actuator 10 acts directly via an end face 52 of the actuator cup 11 onto the curved one Surface 53 of the valve needle head 47 of the valve needle 45 on.
  • the end face 52 of the actuator pot 11 is in this Embodiment just formed so that the partially spherical valve needle head 47 in one Actuation of the actuator 10 rolls on the end face 52 and thereby an advantageous contact of the valve needle head 47 is given on the front side 52 of the actuator pot 11.
  • the invention is not based on those described Embodiments limited. It is particularly suitable the invention also for an internal fuel injector 1.

Landscapes

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

Claims (12)

  1. Injecteur de carburant (1), notamment pour une installation d'injection de carburant d'un moteur à combustion interne, comprenant un organe d'obturation de soupape (46) actionné par un actionneur (10) par l'intermédiaire d'une aiguille d'injecteur (45), cet organe d'obturation coopérant avec une surface formant siège de soupape (44) pour former un siège d'étanchéité,
    l'aiguille d'injecteur (45) étant décalée angulairement par rapport à l'axe longitudinal (13) de l'injecteur et l'axe (54) de l'aiguille (45) faisant avec l'axe (55) de l'actionneur (10) un angle de basculement (α) prédéterminé,
    caractérisé en ce que
    la surface (44) formant siège de soupape est réalisée sur un corps de siège de soupape (40) s'appuyant contre une surface de liaison sphérique (41) du corps (5) de l'injecteur de carburant (1).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le corps formant siège de soupape (40) est de forme concave au moins au niveau de la surface de liaison (41).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    le corps (5) de l'injecteur comporte une découpe (56) traversée par l'aiguille d'injecteur (45).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    la section de la découpe (56) est plus grande que la section de l'aiguille d'injecteur (45) pour permettre un réglage en continu de l'angle de basculement (α).
  5. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'organe formant siège de soupape (40) est relié au corps (5) de l'injecteur par un cordon de soudure (43).
  6. Injecteur de carburant selon l'une des revendications 1 à 5,
    caractérisé en ce que
    l'actionneur (10) est un actionneur piézo-électrique ou magnétostrictif.
  7. Injecteur de carburant selon l'une des revendications 1 à 6,
    caractérisé en ce que
    l'actionneur (10) agit par un élément d'actionnement (25) sur l'aiguille d'injecteur (45).
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce qu'
    une face frontale (52) de l'élément d'actionnement (25) s'appuie contre la tête (47) de l'aiguille d'injecteur (45).
  9. Injecteur de carburant selon la revendication 8,
    caractérisé en ce que
    la face frontale (52) de l'élément d'actionnement (25) et/ou la tête (47) de l'aiguille d'injecteur sont réalisées au moins en partie sous une forme sphérique ou lenticulaire.
  10. Injecteur de carburant selon l'une des revendications 1 à 6,
    caractérisé en ce que
    l'actionneur (10) agit sur l'aiguille d'injecteur (45) par l'intermédiaire d'une tête d'actionneur (11) assurant l'étanchéité de l'actionneur.
  11. Injecteur de carburant selon la revendication 10,
    caractérisé en ce qu'
    une surface frontale (52) de la tête d'actionneur (11) s'applique contre la tête (47) de la l'aiguille d'injecteur (45).
  12. Injecteur de carburant selon la revendication 11,
    caractérisé en ce que
    la face frontale (52) de la tête d'actionneur (11) et/ou la tête d'aiguille (47) est partiellement de forme sphérique ou lenticulaire.
EP00945543A 1999-06-19 2000-05-20 Soupape d'injection de carburant Expired - Lifetime EP1108137B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19928204A DE19928204A1 (de) 1999-06-19 1999-06-19 Brennstoffeinspritzventil
DE19928204 1999-06-19
PCT/DE2000/001625 WO2000079124A1 (fr) 1999-06-19 2000-05-20 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1108137A1 EP1108137A1 (fr) 2001-06-20
EP1108137B1 true EP1108137B1 (fr) 2004-12-22

Family

ID=7911903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945543A Expired - Lifetime EP1108137B1 (fr) 1999-06-19 2000-05-20 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6543702B1 (fr)
EP (1) EP1108137B1 (fr)
JP (1) JP2003502577A (fr)
KR (1) KR20010072698A (fr)
DE (2) DE19928204A1 (fr)
WO (1) WO2000079124A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963568A1 (de) * 1999-12-29 2001-07-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10007733A1 (de) * 2000-02-19 2001-08-23 Daimler Chrysler Ag Einspritzventil
DE50214751D1 (de) * 2001-08-08 2010-12-16 Siemens Ag Dosiervorrichtung
DE10147669A1 (de) * 2001-09-27 2003-04-10 Bosch Gmbh Robert Piezoaktor zur Betätigung eines mechanischen Bauteils
DE10153630A1 (de) * 2001-10-31 2003-07-10 Bosch Gmbh Robert Brennstoffeinspritzventil
US20070246224A1 (en) * 2006-04-24 2007-10-25 Christiaan Krauss Offset valve system for downhole drillable equipment
WO2008084502A1 (fr) * 2007-01-09 2008-07-17 Ucal Fuel Systems Limited Moteur à combustion interne présentant un moyen pour le doter d'un injecteur
DE102009000184A1 (de) * 2009-01-13 2010-07-15 Robert Bosch Gmbh Brennstoffeinspritzventil
US9546633B2 (en) 2012-03-30 2017-01-17 Electro-Motive Diesel, Inc. Nozzle for skewed fuel injection
CN104984876B (zh) * 2015-07-21 2017-08-25 惠州市德赛自动化技术有限公司 一种斜插式点胶装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB611620A (en) * 1945-11-13 1948-11-02 Texaco Development Corp Improvements in or relating to the operation of internal combustion engines having airless injection of fuel
US3995813A (en) * 1974-09-13 1976-12-07 Bart Hans U Piezoelectric fuel injector valve
DE2501283A1 (de) * 1975-01-15 1976-07-22 Bosch Gmbh Robert Einspritzventil
DE19703836C2 (de) * 1997-02-01 1999-09-09 Bertsch Elektromagnetisches Einspritzventil für Brennkraftmaschinen
DE19712591A1 (de) 1997-03-26 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung sowie Verwendung eines Brennstoffeinspritzventils
EP0869278B1 (fr) * 1997-04-04 2004-03-24 Siemens Aktiengesellschaft Soupape à injection avec moyens de compensation de la dilatation thermique d'un organe d'actionnement piézoélectrique
JP3771361B2 (ja) * 1997-11-26 2006-04-26 株式会社日立製作所 燃料噴射弁
US6308901B1 (en) * 2000-02-08 2001-10-30 Siemens Automotive Corporation Fuel injector with a cone shaped bent spray

Also Published As

Publication number Publication date
DE50009025D1 (de) 2005-01-27
KR20010072698A (ko) 2001-07-31
DE19928204A1 (de) 2000-12-21
US6543702B1 (en) 2003-04-08
JP2003502577A (ja) 2003-01-21
EP1108137A1 (fr) 2001-06-20
WO2000079124A1 (fr) 2000-12-28

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