EP1423604A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1423604A1
EP1423604A1 EP02754212A EP02754212A EP1423604A1 EP 1423604 A1 EP1423604 A1 EP 1423604A1 EP 02754212 A EP02754212 A EP 02754212A EP 02754212 A EP02754212 A EP 02754212A EP 1423604 A1 EP1423604 A1 EP 1423604A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
cone
diameter
valve seat
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.)
Granted
Application number
EP02754212A
Other languages
German (de)
English (en)
Other versions
EP1423604B1 (fr
Inventor
Jürgen RAIMANN
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 EP1423604A1 publication Critical patent/EP1423604A1/fr
Application granted granted Critical
Publication of EP1423604B1 publication Critical patent/EP1423604B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • DE 198 04 463 AI discloses a fuel injection system for a mixture-compressing, spark-ignition internal combustion engine, which comprises a fuel injection valve which injects fuel into a combustion chamber formed by a piston / cylinder construction and is provided with a spark plug projecting into the combustion chamber.
  • the fuel injector is provided with at least one row of injection holes distributed over the circumference of the fuel injector. Through a targeted injection of fuel through the injection holes, a jet-guided combustion process is realized by forming a mixture cloud with at least one jet.
  • a disadvantage of the fuel injector known from the above-mentioned document is, in particular, the coking of the spray openings, which thereby clog and reduce the flow through the fuel injector to an unacceptable extent. This leads to malfunction of the internal combustion engine.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a flame protection cone arranged downstream of the injection openings of the fuel injector reduces the temperature of the flame front of the blending mixture cloud in the area of the spray openings so much that no combustion residues can precipitate in the area of the spray openings, which means that an overgrowth of the spray openings due to coking residues is avoided.
  • the flame protection cone is advantageously formed on the spray-side end of the fuel injector, for example on the valve seat body.
  • the flame retardant cone is designed as a cone or truncated cone, as a multi-part cone with different angles of inclination or as a truncated cone with an attached ball, which on the one hand enables simple and inexpensive production and on the other hand takes into account any injection situations with any number and arrangement of spray openings can be worn.
  • Figure 1 is a schematic section through a first embodiment of a fuel injector according to the invention in an overall view.
  • FIG. 2 is an enlarged schematic view of the spray-side part of the fuel injector shown in FIG. 1 in area II in FIG. 1;
  • 3A-C show exemplary embodiments of a flame protection cone designed according to the invention, which is in each case attached to an injection-side end of the fuel injection valve;
  • Fig. 4 shows an embodiment of a flame protection cone designed according to the invention on a fuel injection valve, which is suitable for oblique injection.
  • the fuel injection valve 1 shows an exemplary sectional view of an exemplary embodiment of a fuel injection valve 1 according to the invention.
  • the fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.
  • the fuel injector 1 is suitable for direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is, for example, operatively connected via a weld seam 41 to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an inward opening fuel injection valve 1 which has a plurality of spray openings 7 which are arranged on at least one circle which is concentric with the axis of the valve seat body 5.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10 acting as an actuator for the valve needle 3.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a 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 coating 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 disk 15 is used for stroke adjustment.
  • An armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the first flange 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • a second flange 31 is arranged on the downstream side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld seam. 33 connected.
  • An elastic intermediate ring 32 is arranged between the armature 20 and the second flange 31 for damping armature bumpers when the fuel injector 1 closes.
  • Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and on the valve seat body 5.
  • 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 not shown further distributor line.
  • the fuel injection valve 1 on the valve seat body 5 has a flame protection cone 34, which is provided within the at least one circle of spray openings 7.
  • the flame protection cone 34 reduces the tendency towards coking due to its arrangement on the outflow side of the spray openings 7 and thus prevents malfunctions of the fuel injector 1 by clogging the spray openings 7 and an impermissible reduction in the fuel flow.
  • An injection-side end 35 of the fuel injection valve 1 with the measures according to the invention is shown in more detail in FIGS. 2 and 3A.
  • the first flange 21 on the valve needle 3 is acted upon by the return spring 23 against a lifting direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact.
  • the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
  • the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 in the stroke direction against the spring force of the return spring 23.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction.
  • the valve closing body 4 which is operatively connected to the valve needle 3, lifts off the valve seat surface 6, as a result of which the fuel is sprayed off at the spray openings 7. If the coil current is switched off, the armature 20 drops from the inner pole 13 after the magnetic field is sufficiently reduced by the pressure of the return spring 23 on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction. As a result, the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed. The armature 20 rests on the armature stop formed by the second flange 31.
  • FIG. 2 shows an enlarged schematic view of the injection-side end 35 of the fuel injector 1 according to the invention shown in FIG. 1 in area II in FIG. 1.
  • the fuel fine injection valve 1 has a flame protection cone 34, which for lowering the flame
  • the flame retardant cone 34 is of a pointed cone and can either be formed in one piece with the valve seat body 5 or can be fixed to it in a suitable manner, for example by means of soldering, welding or gluing.
  • the axial length L and the diameter D of the flame retardant cone 34 depend on the opening angle ⁇ of the mixture cloud injected into the combustion chamber and should in each case be dimensioned such that the flame retardant cone 34 is not wetted by the mixture cloud.
  • the coking of the spray openings 7 can be reduced by the arrangement of the flame protection cone 34 on the outflow side of the spray openings 7. Since the diameter of the spray openings 7 is typically approximately 100 ⁇ m, the risk that the spray openings 7 become blocked by coking over time and thus the flow rate is impermissibly restricted is relatively large. This is particularly due to the high temperatures when igniting of the mixture cloud injected into the combustion chamber, since this causes components of the fuel to settle at the tip of the fuel injector 1. By attaching the flame retardant cone 34, the surface temperature in the outlet area of the spray openings 7 can be reduced to such an extent that the spray openings 7 cannot overgrow due to coking residues.
  • the flame protection cone 34 in particular prevents the flame front from spreading in the region of the spray openings 7.
  • 3A to 3C show the section of the fuel injector 1 designed according to the invention shown in FIG. 2 and designated III with different embodiments of the flame protection cone 34 according to the invention.
  • FIG. 3A shows the simple conical shape, which has already been mentioned with reference to FIG. 2.
  • the length L of the flame protection cone 34 and its diameter D at the base depend on the shape and the opening angle of the injected mixture cloud.
  • the axial length L is typically up to three times the diameter Dg of the spray-side end 35 of the fuel injection valve 1, while the diameter D is a maximum of half the diameter D B of the spray-side end 35 of the fuel injection valve 1.
  • FIG. 3B shows a further possible form of the flame protection cone 34.
  • a first region 36 facing the valve seat body 5 is frustoconical, the diameter D increasing from the base in the spray direction.
  • a second region 37 which is frustoconical.
  • the diameter D of the first region 36 is at the base up to half the diameter D B of the downstream end 35 of the fuel injector 1 and can increase up to one and a half times the diameter D B of the downstream end 35 of the fuel injector 1 at the base of the second region 37.
  • the axial length L of the Flame protection cone 34 can be up to four times the diameter D B of the fuel injector 1 in the area of the valve seat body 5, of which up to a quarter is accounted for by the second area 37.
  • 3C shows a third embodiment of the flame retardant cone 34 according to the invention, the shape of a truncated cone 38 with a ball 39 attached being chosen here.
  • the axial length L of the truncated cone 38 can be up to three times the diameter D B of the fuel injector 1 in the region of the valve seat body 5, while the ball 39 can reach a diameter d which corresponds to the diameter D B of the fuel injector 1 im Area of the valve closing body 5 corresponds.
  • the invention is not limited to the exemplary embodiments shown and can be used for any forms of flame protection cones 34, which can be fixed in any manner on the injection-side end of the fuel injection valve 1, and for any construction of fuel injection valves 1.

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)

Abstract

Soupape (1) d'injection de carburant pour l'injection directe de carburant dans la chambre de combustion de moteurs à combustion interne, qui comporte un actionneur (10), une aiguille (3) de soupape actionnée par l'actionneur (10) et destinée à déplacer un obturateur (4) de soupape formant un siège étanche avec une surface (6) de siège de soupape formée sur le corps (5) de siège de soupape, et au moins un orifice d'injection (7) formé en aval du siège (6) de soupape. Un cône de protection (34) contre les flammes est situé sur une extrémité (35), côté écoulement, de la soupape (1) d'injection de carburant.
EP02754212A 2001-08-29 2002-06-14 Soupape d'injection de carburant Expired - Lifetime EP1423604B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10142301A DE10142301A1 (de) 2001-08-29 2001-08-29 Brennstoffeinspritzventil
DE10142301 2001-08-29
PCT/DE2002/002174 WO2003027488A1 (fr) 2001-08-29 2002-06-14 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1423604A1 true EP1423604A1 (fr) 2004-06-02
EP1423604B1 EP1423604B1 (fr) 2005-05-04

Family

ID=7696980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754212A Expired - Lifetime EP1423604B1 (fr) 2001-08-29 2002-06-14 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US7021564B2 (fr)
EP (1) EP1423604B1 (fr)
JP (1) JP2005504219A (fr)
KR (1) KR20040029017A (fr)
DE (2) DE10142301A1 (fr)
WO (1) WO2003027488A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112746923B (zh) * 2020-07-29 2022-10-04 天津职业技术师范大学(中国职业培训指导教师进修中心) 一种分体式侧进油喷油器进油装置、侧进油喷油器进油系统

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1425329A (en) * 1918-08-26 1922-08-08 Adolph A Mellblom Spark plug
DE2905396A1 (de) 1979-02-13 1980-08-14 Bosch Gmbh Robert Zapfenduese, insbesondere fuer mehrkammer-dieselmotoren
DE2939280A1 (de) 1979-09-28 1981-04-16 Robert Bosch Gmbh, 7000 Stuttgart Zapfenduese fuer dieselmotore
JPS57152458U (fr) * 1981-03-23 1982-09-24
JPS5890365U (ja) * 1981-12-15 1983-06-18 愛三工業株式会社 電磁燃料噴射器
DE3225180A1 (de) * 1982-07-06 1984-01-12 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil
GB8318802D0 (en) 1983-07-12 1983-08-10 Lucas Ind Plc Fuel injection nozzles
DE3623223A1 (de) * 1986-07-10 1988-02-04 Daimler Benz Ag Luftverdichtende einspritzbrennkraftmaschine
US5161743A (en) * 1986-10-24 1992-11-10 Nippondenso Co., Ltd. Electromagnetic fuel injection valve for internal combustion engine
DE3928912A1 (de) 1988-09-29 1990-04-05 Avl Verbrennungskraft Messtech Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE3841324A1 (de) 1988-12-08 1990-06-13 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
JP3136829B2 (ja) * 1993-05-06 2001-02-19 株式会社デンソー 燃料噴射弁
DE4442350A1 (de) * 1993-12-21 1995-06-22 Bosch Gmbh Robert Zerstäubungssieb und Brennstoffeinspritzventil mit einem Zerstäubungssieb
DE4442355B4 (de) 1994-11-29 2004-02-12 Continental Teves Ag & Co. Ohg Verfahren zur Erfassung und Auswertung von fahrdynamischen Zuständen
DE19804463B4 (de) 1998-02-05 2006-06-14 Daimlerchrysler Ag Kraftstoffeinspritzsystem für Ottomotoren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03027488A1 *

Also Published As

Publication number Publication date
US7021564B2 (en) 2006-04-04
DE50203025D1 (de) 2005-06-09
WO2003027488A1 (fr) 2003-04-03
KR20040029017A (ko) 2004-04-03
DE10142301A1 (de) 2003-03-20
JP2005504219A (ja) 2005-02-10
EP1423604B1 (fr) 2005-05-04
US20040026536A1 (en) 2004-02-12

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