WO2002059476A2 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
WO2002059476A2
WO2002059476A2 PCT/DE2002/000251 DE0200251W WO02059476A2 WO 2002059476 A2 WO2002059476 A2 WO 2002059476A2 DE 0200251 W DE0200251 W DE 0200251W WO 02059476 A2 WO02059476 A2 WO 02059476A2
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel injection
valve seat
closing body
fuel
Prior art date
Application number
PCT/DE2002/000251
Other languages
German (de)
English (en)
Other versions
WO2002059476A3 (fr
Inventor
Norbert Keim
Dieter Etzel
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 WO2002059476A2 publication Critical patent/WO2002059476A2/fr
Publication of WO2002059476A3 publication Critical patent/WO2002059476A3/fr

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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on 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
    • 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
    • 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
    • F02M61/06—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 being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • 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
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • 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 injector according to the preamble of the main claim.
  • Fuel injectors that are specially designed to suit the conditions in the combustion chamber
  • Spray geometry have several spray openings are known. From DE 41 42 430 AI. is for example a
  • Spray openings are arranged distributed over the circumference of a conically shaped valve seat body.
  • Valve seat body is introduced, the valve seat surface
  • Fuel injector a valve closing body in a sealing system.
  • the valve closing body is divided into two frustoconical sections.
  • the cone opening angle of the second frustoconical part following in the downstream direction after the first frustoconical part has a somewhat larger opening angle than the first frustoconical part.
  • the opening angle of the first frustoconical part is smaller than the opening angle of the conical inner contour of the valve seat body, that of the second conical part, however, larger. In this way, the transition line between the first and the second frustoconical part is in contact with the valve seat surface and forms the sealing seat.
  • valve seat body which is made in one piece with the nozzle body, is also tapered in the downstream direction.
  • the valve seat surface is introduced, downstream of which the spray openings are arranged.
  • the valve closing body has a frustoconical geometry at its downstream end, which is followed further downstream by a second frustoconical geometry, the opening angle of which is greater than the opening angle of the first frustoconical geometry.
  • the spray openings enclose a constant non-zero angle with the central axis of the fuel injector and are distributed over the circumference of the valve seat body.
  • both fuel injectors by lifting the valve closing body against the direction of flow from the valve seat. They open an annular channel along the conical inner contour of the valve seat body for the fuel flow. The fuel flows along the inside of the conical valve seat body to the spray openings. Because of the pressure gradients that occur between the interior of the fuel injection valve and the exterior, the fuel flow is deflected and enters the spray openings.
  • the deflection of the fuel corresponds to the angle at which the spray openings are made in the valve seat body. After flowing through the narrow point between the valve closing body and the valve seat surface, the fuel flows along the inner wall of the valve seat body up to the spray opening. The fuel flows through the spray openings and is sprayed, for example, into the combustion chamber of an internal combustion engine.
  • a disadvantage of the specified fuel injection valves is the strong deflection of the fuel into the spray openings, which in extreme cases can be 90 °.
  • the fuel is not directed to the spray openings. This creates a highly turbulent flow. This leads to flow losses and thus reduces the effectively sprayed fuel. Accordingly, in order to obtain an increase in the amount of fuel sprayed off, an increase in the pressure at the inlet opening is necessary. required by increasing the valve needle stroke.
  • the fuel injector according to the invention with the characterizing feature of the main claim has the advantage that the flow losses when the fuel enters the spray openings are greatly reduced. This makes it possible to increase the static spraying quantity without having to increase the valve needle stroke.
  • the simple variant formation is also advantageous.
  • the fuel quantity can be influenced in a wide range and thus the possibility is given to produce several variants on one production line without changing the valve needle stroke.
  • Fig. 1 shows a cal atic partial section through an embodiment of an inventive
  • Fig. 2 is a schematic partial section in section II of Fig. 1 through the embodiment of a fuel injector according to the invention. Description of the embodiment
  • the fuel injector 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injection valve 1 comprises a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged in a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an electromagnetically actuated fuel injection valve 1 which has a plurality of spray openings 7.
  • the nozzle body 2 is sealed by a seal 8 against a lower end 9 of the housing.
  • a 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 housing end 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 sheath 18, which can be molded onto the inner pole 13.
  • the valve needle 3 is guided in a disk-shaped valve needle guide 14. This is paired with a shim 15, which is used to adjust the valve needle stroke.
  • An armature 20 is located on the upstream side of the adjusting disk 15. This armature is non-positively connected via a flange 21 to the valve needle 3, which is connected to the flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24 pressed into the inner pole 13.
  • Fuel channels 30a and 30b run in the valve needle guide 14 and in the armature 20.
  • a filter element 25 is arranged in a central fuel feed 16.
  • the fuel injection valve 1 is sealed by a seal 28 against a fuel line, not shown.
  • 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 the stroke direction via the flange 21 on the valve needle 3 in such a way that the valve closing body 4 is held in sealing contact with the valve seat surface 6.
  • the magnet coil 10 When the magnet 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 13 and the armature 20.
  • the armature 20 takes the 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 lifts off the valve seat surface 6 and the fuel is sprayed off from the spray opening 7.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23 on the flange 21, as a result of which the valve needle 3 moves counter to the stroke direction emotional.
  • the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • Fig. 2 shows the valve seat area of the embodiment in a detailed representation.
  • the valve closing body 4 projects into a conical valve seat recess 33 in the valve seat body 5.
  • the valve seat surface 6 is arranged, which cooperates with the valve seat body 4 to form the sealing seat.
  • the spray openings 7 are arranged downstream of the sealing seat.
  • the central axes 35 of the spray openings 7 typically form an angle other than zero with the central axis 36 of the fuel injection valve 1.
  • the spray openings 7 are distributed over the circumference of the valve seat body 5.
  • the valve closing body 4 Downstream of the valve seat surface 6, the valve closing body 4 has a frustoconical part 31, to which a cylindrical part 32 is connected further downstream.
  • the length of the cylindrical part 32 is dimensioned such that the valve closing body 4 does not touch the valve seat body 5 with the cylinder 32 part.
  • An annular gap 34a is formed between the jacket of the frustoconical part 31 of the valve closing body 4 and the conical part 33 of the valve seat body 5.
  • the cone opening angle of the valve closing body 4 is smaller than the cone opening angle of the valve seat recess 33, so that the distance between the valve seat body 5 and the valve closing body 4 increases in the downstream direction from the valve seat surface 6.
  • the cylindrical part 32 of the valve closing body 4 and the conical part 33 of the valve seat body 5 delimit a second annular gap 34b, which tapers towards the downward stro end of the inlet into the spray opening 7.
  • I Part of the fuel has a speed vector that runs parallel to the lateral surface of the frustoconical part 31 of the valve closing body 4. Up to the transition of the frustoconical part 32 of the valve closing body 4, the fuel therefore flows partly away from the inner wall of the valve seat body 5. At the transition to the cylindrical part 32 of the valve closing body 4, the fuel flow is deflected. The deflected fuel j flows approximately in the direction of the spray openings 7, so that no further sharp deflection is required to enter the spray openings 7.

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

L'invention concerne une soupape d'injection de carburant pour systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape comporte un élément de siège de soupape (5), dont la dimension radiale diminue, au moins à l'intérieur dans le sens du courant, et dans lequel se trouve une surface de siège de soupape (6). Cette surface coopère avec un élément de fermeture de soupape (4), qui se trouve en liaison active avec un pointeau de soupape (3), pour former un siège d'étanchéité. Ladite soupape comprend plusieurs orifices d'injection (7) dont les axes médians (35) forment un angle différent de zéro avec l'axe médian (36) de la soupape (1). L'invention est caractérisée en ce que l'intervalle entre la face interne de l'élément du siège de soupape (5) et la surface de l'élément de fermeture de soupape (4) augmente vers l'aval de la surface du siège de soupape (6), pour diminuer à nouveau dans la même direction.
PCT/DE2002/000251 2001-01-24 2002-01-24 Soupape d'injection de carburant WO2002059476A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10103050.9 2001-01-24
DE2001103050 DE10103050A1 (de) 2001-01-24 2001-01-24 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
WO2002059476A2 true WO2002059476A2 (fr) 2002-08-01
WO2002059476A3 WO2002059476A3 (fr) 2002-09-26

Family

ID=7671544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/000251 WO2002059476A2 (fr) 2001-01-24 2002-01-24 Soupape d'injection de carburant

Country Status (2)

Country Link
DE (1) DE10103050A1 (fr)
WO (1) WO2002059476A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10312429A1 (de) * 2003-03-20 2004-11-18 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004005727A1 (de) 2004-02-05 2005-09-01 Robert Bosch Gmbh Brennstoffeinspritzsystem

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142430A1 (de) 1990-12-21 1992-07-02 Zexel Corp Kraftstoffeinspritzduese
DE4303813C1 (de) 1993-02-10 1994-06-30 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06207568A (ja) * 1993-01-11 1994-07-26 Hitachi Ltd 燃料噴射弁及び燃料噴射弁の製造方法
GB9425652D0 (en) * 1994-12-20 1995-02-22 Lucas Ind Plc Fuel injection nozzle
DE19634933B4 (de) * 1996-08-29 2007-06-06 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19844638A1 (de) * 1998-09-29 2000-03-30 Siemens Ag Kraftstoffeinspritzventil für eine Brennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142430A1 (de) 1990-12-21 1992-07-02 Zexel Corp Kraftstoffeinspritzduese
DE4303813C1 (de) 1993-02-10 1994-06-30 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen

Also Published As

Publication number Publication date
WO2002059476A3 (fr) 2002-09-26
DE10103050A1 (de) 2002-08-08

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