EP0927303B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP0927303B1
EP0927303B1 EP98928157A EP98928157A EP0927303B1 EP 0927303 B1 EP0927303 B1 EP 0927303B1 EP 98928157 A EP98928157 A EP 98928157A EP 98928157 A EP98928157 A EP 98928157A EP 0927303 B1 EP0927303 B1 EP 0927303B1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve
fuel injection
injection valve
seat body
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
EP98928157A
Other languages
German (de)
English (en)
Other versions
EP0927303A1 (fr
Inventor
Jochen Riefenstahl
Henning Teiwes
Gottfried Flik
Ottmar Martin
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 EP0927303A1 publication Critical patent/EP0927303A1/fr
Application granted granted Critical
Publication of EP0927303B1 publication Critical patent/EP0927303B1/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
    • F02M61/16—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
    • 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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration

Definitions

  • the invention relates to a fuel injector of the genus Main claim. It is already a fuel injector from DE-PS 49 47 40 is known in which a valve closing body connected to a valve needle with a Valve seat body cooperates to form a valve seat. To guide the fuel is in an essentially axially extending fuel supply line to a nozzle body provided, which extends in a radial direction in the valve seat body Fuel channel opens. The fuel channel opens in the area of the valve seat a spray opening.
  • a newer design of a fuel injector for direct injection of Fuel in a cylinder of an internal combustion engine goes, for. B. from the DE 196 00 403 A1.
  • the fuel distribution is within that of the known ones Fuel injector sprayed fuel jet largely radially symmetrical.
  • an asymmetrical Fuel distribution within the fuel jet is desirable. So can for example, a different fuel-air mixture composition in the area of the spark plug be advantageous than in the remaining area of the fuel jet.
  • the fuel injector according to the invention with the characterizing features of The main claim has the advantage that an accurate adjustment of the Fuel injector metered amount of fuel is possible by the Opening cross section of a throttle point of one or more fuel channels Targeted fuel channels in the fully assembled state of the fuel injector is changeable.
  • the metered by the fuel injection valves according to the invention The amount of fuel is fully automatic in a relatively short time, with relatively little effort adjustable. The manufacturing costs are therefore significantly reduced.
  • Fuel injectors or the special geometric shape of the intake manifold with fuel injectors injecting into the intake manifold of the internal combustion engine be adjusted.
  • the on wall areas of the cylinder or Intake manifold amount of fuel can be reduced, which improved in Expresses exhaust gas values.
  • the throttling point can be designed in a particularly advantageous and simple manner be that a nozzle body surrounding the valve seat body in this area from the outside z. B. is plastically deformable by means of a bolt element and the fuel channel constricts according to its deformation.
  • the opening cross section of the throttle point can be set particularly easily in an advantageous manner by an automatic machine.
  • an insertable into the fuel channel is also particularly advantageous Manipulator, the insertion depth of the opening cross-section of the throttle assigned assigned fuel channel.
  • This training is particularly advantageous it that the opening cross-section of the throttle point is both reduced and enlarged can be, which simplifies the adjustment process.
  • FIG. 1 shows an axial section by a first embodiment of an excerpt
  • fuel injector according to the invention
  • FIG. 2 shows an axial section through a second embodiment of an excerpt shown, according to the invention Fuel injector.
  • Fig. 1 shows an axial section through a first embodiment of a Fuel injector 1 designed according to the invention in one extract Presentation. Only the spray-side end of the fuel injector is shown 1.
  • valve seat body 3 is arranged on the injection-side end and is connected by means of a weld seam 4 is sealingly connected to the nozzle body 2.
  • the valve seat body 3 is also in the formed essentially hollow cylindrical, the outer diameter of the Valve seat body 3 with the inner diameter of the nozzle body 2 essentially coincides, so that the valve seat body 3 into the inner opening 5 of the nozzle body 2nd is fitted.
  • the valve seat body 3 has concentric to its longitudinal axis, which with the Longitudinal axis 6 of fuel injector 1 coincides, a guide bore 7, which serves to guide a valve needle 8.
  • the valve needle 8 is cylindrical in the exemplary embodiment and in one piece formed with a valve closing body 9. To reduce the inertial mass, the Valve needle 8, however, also in the form of a hollow cylinder or from a curved sheet metal part be trained.
  • the valve closing body 9 has a conical valve closing surface 10, which with a likewise conical, at the spray end of Valve seat body 3 arranged valve seat surface 11 to form an outside closing valve seat 12 cooperates.
  • the valve needle 8 and the Valve needle 8 connected valve closing body 9 are along the longitudinal axis 6 by means of a z. B. with electromagnetic or piezoelectric actuator a translational stroke can be applied. A not shown, for. B.
  • Valve seat 12 is in particular for a fuel injection valve 1 for direct injection of Suitable fuels in a cylinder or combustion chamber of an internal combustion engine, since the combustion pressure prevailing in the cylinder the valve closing body 9 in Closing direction applied and not to inadvertent opening of the Fuel injector 1 leads.
  • the fuel channel there is at least one fuel channel in the valve seat body 3, however, preferably several fuel channels are provided.
  • the fuel channel exists from a first section 20 running in the radial direction and one with the first section 20 connected, extending in the axial direction second section 21.
  • the first, radial section 20 of the fuel channel 20, 21 is part of a Through bore 22, which extends from the outer circumferential surface 23 of the valve seat body 3 extends through this up to the guide bore 7.
  • the second, axial Section 21 of the fuel channel 20, 21 is in the exemplary embodiment as a blind bore 31 educated.
  • the second section 21 of the fuel channel 20, 21 to form as a through hole and on the spray-side end face 24 of the valve seat body 3 by a suitable To close the closing body.
  • the first radial section 20 of the fuel channel 20, 21 opens into an annular groove 25 formed on the valve needle 8 independently of the Stroke position of the valve needle 8.
  • Through hole 22 is in this one in the Ausrrockungsbeispiel as a stepped cylinder trained manipulator 26 insertable.
  • the manipulator 26 has one on the Diameter of the through hole 22 adapted guide portion 27 and a pin-like section 28 with a reduced diameter.
  • the opening cross section of the fuel channel 20, 21 becomes all the more reduced, the deeper the manipulator 26 in the through hole 22 and thus in the Fuel channel 20, 21 is introduced.
  • the manipulator 26 therefore forms a throttle point 29 with adjustable opening cross section.
  • the opening cross section of this throttle point 29 can also in the fully assembled state of the fuel injector 1 without further be varied.
  • the manipulator 26 After setting the opening cross section of the throttle 29, the manipulator 26 becomes sealing in the exemplary embodiment by means of a weld seam 30 connected to the valve seat body 3. As a result, the manipulator 26 on the Valve seat body 3 locked and at the same time prevents fuel from the Through hole 22 exits to the outside.
  • a plurality of fuel channels 20, 21 are preferably provided in the valve seat body 3, the z. B. preferably arranged evenly distributed on a concentric pitch circle are.
  • the throttling points 29 of the individual fuel channels 20, 21 are due to their each manipulator 26 independently adjustable.
  • a radially asymmetrical fuel distribution in that of the fuel injector 1 hosed fuel jet are generated because the fuel distribution in the circumferential groove 25 of the valve needle 8 due to the differently throttled inlet of the fuel via the differently throttled fuel channels 20, 21 is uneven.
  • Such an asymmetrical fuel distribution in the hosed Fuel jet is e.g. B. advantageous if the fuel content in the fuel-air mixture in the area of individual components, e.g. B. a spark plug, the inlet or Exhaust valves of the cylinder or the wall areas of the cylinder or Intake pipe should be reduced. In this way, the combustion of the Internal combustion engine optimized and the exhaust gas values are significantly improved.
  • Fig. 2 shows a second embodiment of an inventive Fuel injector 1 in a cut, excerpt.
  • already elements described are provided with the same reference numerals, so that as far as a repetitive description is unnecessary.
  • the first, radial section 20 of each fuel channel 20, 21 is also the one in FIG. 2
  • the illustrated embodiment is designed as a radial bore 44, which in the annular groove 25th the valve needle 8 opens.
  • the second axial section 21 of each fuel channel 20, In the embodiment shown in FIG. 2, 21 is designed as a groove 40, which is formed by a Flattening 21 of the valve seat body 3 is formed.
  • the groove 40 is both with the inner opening 5 of the nozzle body 2 and also with the first section 20 of the fuel channel 20, 21 in connection.
  • the throttle point 29 not by a manipulator 26, but by plastic deformation of the area of the throttle point 29 is a relatively thin-walled wall 41 of the nozzle body 2 educated.
  • the deformation of the wall 41 can, for. B. by means of a bolt element 42nd take place, which penetrates into a recess 43 of the nozzle body 2 and on the thin-walled trained wall 41 of the nozzle body 2 attacks.
  • the one from that Fuel injector 1 metered amount of fuel can therefore in the fully assembled State of the fuel injector 1 can be set fully automatically in the manner that the throttle point 29 is gradually narrowed until the of the Fuel injection valve 1 to be metered amount of fuel is reached.
  • the special one Advantage of the embodiment of the invention is that to adjust the Fuel injector 1 does not measure the amount of fuel the valve lift must necessarily be changed.
  • the individual opening cross sections of the Throttling points 29 of the individual grooves 40 can be set independently of one another. This can be done in a machine either one after the other by turning the Fuel injection valve 1 about its longitudinal axis 6 and a single one in time bolt element 42 penetrating into all depressions 43 or simultaneously a plurality of bolt elements 42 provided on the machine, all of which at the same time Set throttling points 29.
  • the metered total amount of fuel the fuel injector first by moving the Valve seat body 3 and thus adjusting the valve lift can be adjusted and the Weld 4 are applied to lock the valve seat body 3. Subsequently or if necessary beforehand, by pressing the wall 41 of the nozzle body 2 A radially asymmetrical fuel distribution is set at each throttle point 29 become. Furthermore, a fine adjustment of the fuel injector 1 metered amount of fuel.
  • the invention is not restricted to the exemplary embodiments shown. Instead of the Formation of flattened portions 21, the axial grooves 40 in the valve seat body 3 can also be milled. It is also possible to use other known throttling methods use as z. B. are known from shut-off valves. Nor is it absolutely necessary, the fuel channel 20, 21 or the fuel channels 20, 21 in or to form on the valve seat body 3. The fuel channels 20, 21 could at least in sections z. B. can also be arranged in or on the nozzle body 2.

Landscapes

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

Claims (11)

  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 (9) relié à une aiguille d'injecteur (8) et ayant une surface d'obturation (10) qui coopère avec une surface de siège de soupape (11) réalisée sur le corps formant siège de soupape (3) pour former un siège de soupape (12), et au moins un canal de carburant (20, 21) prévu au niveau du corps formant siège de soupape (3), en amont du siège de soupape (12), pour conduire le carburant vers le siège de soupape (12),
    caractérisé en ce que
    dans chaque canal de carburant (20, 21), on a un point d'étranglement (29) dont la section d'ouverture peut être modifiée de l'extérieur de l'injecteur de carburant (1).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé par
    plusieurs canaux de carburant (20, 21) répartis à la périphérie au niveau du corps formant siège de soupape (3), dont les sections d'ouverture des points d'étranglement (29) associés aux canaux de carburant (20, 21) peuvent être modifiées indépendamment les unes des autres pour réaliser une répartition non symétrique du carburant dans le jet éjecté par l'injecteur (1).
  3. Injecteur de carburant selon l'une des revendications 1 ou 2,
    caractérisé par
    un premier segment (20) de chaque canal de carburant (20, 21) qui traverse le corps formant siège de soupape (3) en amont de la surface de siège de soupape (11) avec une composante radiale.
  4. Injecteur de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisé par
    un second segment (21) en amont du premier segment (20) de chaque canal de carburant (20, 21) passant dans ou sur le corps formant siège de soupape (3) dans la direction axiale.
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    le second segment (21) de chaque canal de carburant (20, 21) traverse le corps formant siège de soupape (3) sous la forme d'un perçage axial (31).
  6. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    le second segment (21) de chaque canal de carburant (20, 21) est réalisé sur le corps formant siège de soupape (3) sous la forme d'une rainure axiale (40).
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce que
    le corps formant siège de soupape (3) est entouré par un corps de buse (2) qui ferme vers l'extérieur la rainure axiale (40) de chaque canal de carburant (20, 21), et qui pour modifier la section d'ouverture de chaque point d'étranglement (29) peut subir une déformation plastique radialement en direction du corps formant siège de soupape (3).
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce que
    la paroi (41) du corps de buse (2) au niveau de chaque point d'étranglement (29) présente une épaisseur de paroi réduite pour permettre la déformation par un élément de goujon (42).
  9. Injecteur de carburant selon l'une quelconque des revendications 1 à 8,
    caractérisé par
    un manipulateur (26) qui peut être introduit dans chaque canal de carburant (20, 21) et dont la profondeur d'introduction fixe la section d'ouverture du point d'étranglement (29) du canal de carburant correspondant (20, 21) et qui peut être coulissé à partir de l'extérieur de l'injecteur de carburant (1).
  10. Injecteur de carburant selon la revendication 9,
    caractérisé en ce que
    chaque manipulateur (26) est soudé au corps formant siège de soupape (3).
  11. Injecteur de carburant selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce que
    l'aiguille (8) ou l'organe d'obturation de soupape (9) comporte une rainure annulaire (25) dans laquelle débouche chaque canal de carburant (20, 21).
EP98928157A 1997-06-14 1998-04-08 Soupape d'injection de carburant Expired - Lifetime EP0927303B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19725198 1997-06-14
DE19725198A DE19725198A1 (de) 1997-06-14 1997-06-14 Brennstoffeinspritzventil
PCT/DE1998/000985 WO1998058168A1 (fr) 1997-06-14 1998-04-08 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP0927303A1 EP0927303A1 (fr) 1999-07-07
EP0927303B1 true EP0927303B1 (fr) 2002-12-11

Family

ID=7832484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98928157A Expired - Lifetime EP0927303B1 (fr) 1997-06-14 1998-04-08 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6098598A (fr)
EP (1) EP0927303B1 (fr)
JP (1) JP2000517029A (fr)
KR (1) KR20000068103A (fr)
DE (2) DE19725198A1 (fr)
WO (1) WO1998058168A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2021892B1 (fr) * 2006-04-27 2013-02-20 Sko Flo Industries, Inc. Soupape de regulation de debit
WO2007127986A2 (fr) * 2006-04-28 2007-11-08 Sko Flo Industries, Inc. Appareil de mesure d'écoulement
US7963464B2 (en) * 2008-01-23 2011-06-21 Caterpillar Inc. Fuel injector and method of assembly therefor
DE102009045513A1 (de) 2009-10-09 2011-04-14 Robert Bosch Gmbh Fahrzeugnavigationssystem und Verfahren zum Betreiben des Fahrzeugnavigationssystems
DE102010043110A1 (de) * 2009-12-21 2011-06-22 Robert Bosch GmbH, 70469 Kraftstoffeinspritzventil für Brennkraftmaschinen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864044A1 (fr) * 1996-10-02 1998-09-16 Robert Bosch Gmbh Soupape et procede de production d'une soupape

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE494740C (de) * 1926-04-11 1930-03-27 Fried Krupp Germaniawerft Akt Brennstoffventil fuer Dieselmaschinen mit Lufteinblasung
US3343798A (en) * 1965-07-20 1967-09-26 Gen Motors Corp Injector clamp and index device
US3361353A (en) * 1965-10-20 1968-01-02 Mitchell W. Millman Method and apparatus for injection of liquid fuels
JPS584049Y2 (ja) * 1974-09-04 1983-01-24 萬世工業株式会社 ガスリユウリヨウチヨウセツシ ノ ダツラクボウシソウチ
US4046322A (en) * 1976-05-21 1977-09-06 General Motors Corporation Fuel injection nozzle assembly with stretch element
GB8319284D0 (en) * 1983-07-16 1983-08-17 Lucas Ind Plc Fuel injection nozzles
DE4123787A1 (de) * 1991-07-18 1993-01-21 Bosch Gmbh Robert Verfahren zur einstellung eines brennstoffeinspritzventils und brennstoffeinspritzventil
DE4431128A1 (de) * 1994-09-01 1996-03-07 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils und Ventil
JPH08200182A (ja) * 1995-01-25 1996-08-06 Zexel Corp 電磁式燃料噴射弁およびその取付け構造

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864044A1 (fr) * 1996-10-02 1998-09-16 Robert Bosch Gmbh Soupape et procede de production d'une soupape

Also Published As

Publication number Publication date
EP0927303A1 (fr) 1999-07-07
WO1998058168A1 (fr) 1998-12-23
KR20000068103A (ko) 2000-11-25
US6098598A (en) 2000-08-08
JP2000517029A (ja) 2000-12-19
DE59806618D1 (de) 2003-01-23
DE19725198A1 (de) 1998-12-17

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