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WO2003002867A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
WO2003002867A1
WO2003002867A1 PCT/DE2002/001632 DE0201632W WO03002867A1 WO 2003002867 A1 WO2003002867 A1 WO 2003002867A1 DE 0201632 W DE0201632 W DE 0201632W WO 03002867 A1 WO03002867 A1 WO 03002867A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel injection
fuel
injection valve
cover cap
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.)
Ceased
Application number
PCT/DE2002/001632
Other languages
German (de)
English (en)
Inventor
Günter DANTES
Detlef Nowak
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 WO2003002867A1 publication Critical patent/WO2003002867A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
    • 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
    • F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
    • 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
    • F02M61/168—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
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injection system for a mixture-compressing, spark-ignited 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 implemented 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 injection valve to an unacceptable extent. This leads to . Malfunctions of the internal combustion engine.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the spray openings are shielded from the combustion chamber by a cap, so that the high temperatures of the mixture cloud blowing through do not reach the spray openings. As a result, the spray openings can be protected against wetting with fuel and the subsequent overgrowth.
  • the cover cap can be produced simply and inexpensively as a bent sheet metal part by punching out and subsequent shaping.
  • a further advantage is that the spray openings are indeed shielded from the combustion chamber temperature, but the fuel jets can enter through a generously sized opening in a final bottom of the cup-shaped cap unaffected in the 'combustion chamber.
  • Lateral bores which are aligned with the spray openings, ensure an air flow to the spray openings, thereby wetting the
  • Valve seat body in the area of the spray openings and subsequent deposits can be avoided.
  • the number of holes corresponds to the number of spray openings.
  • Fig. 1 shows a schematic section through a first embodiment of a fuel injector designed according to the invention in a
  • Fig. 2 shows a schematic section through the spray-side part of the first exemplary embodiment of the invention shown in Fig. 1
  • FIG. 3 shows a schematic section through a second exemplary embodiment of a fuel injector designed according to the invention in the same area as FIG. 2.
  • Fig. 1 shows an exemplary embodiment of an embodiment according to the invention in a sectional view
  • Fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixed end, spark ignition internal combustion engine.
  • Fuel injection valve 1 is suitable for direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is, for example, via a weld 41 with a Ve tilschlußève 4 in operative connection 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 two spray openings 7.
  • the valve closing body 4 of the fuel injector 1 designed according to the invention has an almost spherical shape. As a result, an offset-free, cardanic valve needle guide is achieved, which ensures that fuel injector 1 functions exactly.
  • the valve seat body 5 of the fuel injection valve 1 is cup-shaped, for example, and its shape contributes to the valve needle guidance.
  • the Ventilsitzkorper 5 is -einatled in a discharge-side recess 34 of the nozzle body 2 and is connected by a weld 35 'which Düsenk ⁇ rper. 2
  • 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 sheath 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 to the valve needle 3 via a first flange 21 which is connected to the first flange 21 by a weld 22.
  • a return spring 23 is supported, which in the present design of the fuel injection valve 1 is brought to a prestress by a sleeve 24.
  • a second flange 31 is arranged on the outflow 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. Between the armature 20 and the second flange 31 is an elastic intermediate ring 32 for damping anchor bumpers when closing the fuel injection valve s
  • Fuel channels 30a and 30b run in the valve needle guide 14 and in the armature 20.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25. Grindings 36 take over the fuel supply to the sealing seat in the area of the valve seat support 5.
  • the fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
  • the fuel injection valve 1 is provided at its downstream end 37 with a cover cap 38 which serves as a coking protection for the spray openings 7.
  • the cover cap 38 shields the spray openings 7 against the high temperatures occurring when the mixture cloud injected into the combustion chamber of the internal combustion engine burns through.
  • the downstream end 37 of the 'fuel injector 1 with the measures according to the invention is shown in detail in Fig. 2.
  • 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.
  • 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 first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction.
  • 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 excerpted sectional illustration of the detail designated II in FIG. 1 from the first exemplary embodiment of a fuel injector 1 designed according to the invention shown in FIG. 1.
  • the fuel injection valve 1 has at its downstream end 37 a cover cap 38, which is fixed, for example by means of a weld seam 39, to the valve seat body 5 of the fuel injection valve 1.
  • the cover cap 38 has an opening 40 which allows the fuel jets sprayed from the spray openings 7 to exit from the cover cap 38.
  • the position and width of the opening 40 is chosen so that the fuel jet can pass through the opening 40 unaffected and the cap 38 is not wetted by fuel.
  • the cap 38 is preferably hollow cylindrical with a bottom 41, in which the opening 40 is located, and is on a circumferential recess 42 of the Valve seat body 5 attached and fixed by means of the weld 39.
  • the end base 41 of the cover cap 38 is preferably designed at a distance from the lower end face of the valve seat body 5.
  • the coking of the spray openings 7 can be reduced by the arrangement of the cover cap 38 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 clogged with coking over time and thus the flow rate is impermissibly restricted is relatively high. This is due in particular to the high temperatures when the mixture cloud injected into the combustion chamber burns through, since this causes components of the fuel to settle at the tip of the fuel injector 1. By attaching the cover cap 38, 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 grow over due to coking residues. The cover cap 38, which thus takes on the function of flame protection, thereby prevents the flame front from spreading in the area between the cover cap 38 and the valve seat body 5.
  • Fig. 3 shows a second embodiment shows in a partial sectional illustration of the invention designed according to the fuel injection valve 1 corresponding to the section shown '2. Corresponding to that in Fig. are provided for better orientation with identical reference numerals components.
  • the cover cap 38 in the present second exemplary embodiment has lateral bores 43 which are introduced in the radial direction into the cover cap 38 and are aligned with the spray openings 7.
  • the number of holes 43 corresponds to z. B. the number of spray openings 7.
  • An air flow can be directed through the bores 43 to the spray openings 7, which ensures that no wetting by fuel occurs and any deposits on the valve seat body 5 in the area of the spray openings 7 are immediately removed by the air flow.
  • the end base 41 of the cover cap 38 can be arched toward the valve seat support 5 against a spray direction of the fuel. As a result, the flow velocity of the air is increased, which creates a nozzle flow which ensures effective cleaning of the valve seat body 5 in the region of the spray openings 7.
  • the invention is not limited to the exemplary embodiments shown and can be used 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

La présente invention concerne une soupape d'injection de carburant (1) pour systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape comprend un actionneur, un pointeau de soupape (3), qui peut être actionné par ledit actionneur et qui permet d'actionner un corps de fermeture de soupape (4) formant un siège d'étanchéité avec une surface de siège de soupape (6) située sur un corps de siège de soupape (5), ainsi que plusieurs orifices de pulvérisation (7), qui sont ménagés dans le corps de siège de soupape (5). Un capuchon (38) est pourvu à une extrémité (37) côté évacuation de la soupape d'injection de carburant (1) et permet de protéger les orifices de pulvérisation (7) par rapport à la chambre de combustion du moteur à combustion interne.
PCT/DE2002/001632 2001-06-26 2002-05-07 Soupape d'injection de carburant Ceased WO2003002867A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10130684.9 2001-06-26
DE2001130684 DE10130684A1 (de) 2001-06-26 2001-06-26 Brennstoffeinspritzventil

Publications (1)

Publication Number Publication Date
WO2003002867A1 true WO2003002867A1 (fr) 2003-01-09

Family

ID=7689444

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/001632 Ceased WO2003002867A1 (fr) 2001-06-26 2002-05-07 Soupape d'injection de carburant

Country Status (2)

Country Link
DE (1) DE10130684A1 (fr)
WO (1) WO2003002867A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1559903A1 (fr) * 2004-01-28 2005-08-03 Siemens VDO Automotive S.p.A. Injecteur de carburant avec aiguille déformable
EP2775133A1 (fr) * 2013-03-06 2014-09-10 Delphi Automotive Systems Luxembourg SA Un moyen de protection pour une buse d'injecteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015206854A1 (de) * 2014-07-10 2016-01-14 Continental Teves Ag & Co. Ohg Ventilsitzträger

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113466A1 (de) * 1981-04-03 1982-10-14 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zum befestigen einer kappe an einem duesenkoerper
US4862857A (en) * 1988-02-12 1989-09-05 Outboard Marine Corporation Fuel injection system for multi cylinder two-stroke engine
JPH03264767A (ja) * 1990-03-15 1991-11-26 Japan Electron Control Syst Co Ltd フューエルインジェクタ
DE4104020A1 (de) * 1991-02-09 1992-08-13 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
US5273215A (en) * 1990-06-21 1993-12-28 Robert Bosch Gmbh Fuel injection valve
US5540387A (en) * 1993-04-20 1996-07-30 Robert Bosch Gmbh Device for injecting a fuel/gas mixture
EP0844386A1 (fr) * 1996-11-26 1998-05-27 Robert Bosch Gmbh Dispositif d'injection d'un mélange combustible/gaz
DE19804463A1 (de) 1998-02-05 1999-08-12 Daimler Chrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
DE10059420A1 (de) * 2000-11-30 2002-06-06 Bosch Gmbh Robert Brennstoffeinspritzventil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113466A1 (de) * 1981-04-03 1982-10-14 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zum befestigen einer kappe an einem duesenkoerper
US4862857A (en) * 1988-02-12 1989-09-05 Outboard Marine Corporation Fuel injection system for multi cylinder two-stroke engine
JPH03264767A (ja) * 1990-03-15 1991-11-26 Japan Electron Control Syst Co Ltd フューエルインジェクタ
US5273215A (en) * 1990-06-21 1993-12-28 Robert Bosch Gmbh Fuel injection valve
DE4104020A1 (de) * 1991-02-09 1992-08-13 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
US5540387A (en) * 1993-04-20 1996-07-30 Robert Bosch Gmbh Device for injecting a fuel/gas mixture
EP0844386A1 (fr) * 1996-11-26 1998-05-27 Robert Bosch Gmbh Dispositif d'injection d'un mélange combustible/gaz
DE19804463A1 (de) 1998-02-05 1999-08-12 Daimler Chrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
DE10059420A1 (de) * 2000-11-30 2002-06-06 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 082 (M - 1215) 27 February 1992 (1992-02-27) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1559903A1 (fr) * 2004-01-28 2005-08-03 Siemens VDO Automotive S.p.A. Injecteur de carburant avec aiguille déformable
WO2005075812A1 (fr) * 2004-01-28 2005-08-18 Siemens Vdo Automotive Spa Injecteur de fluide a aiguille deformable
US8662420B2 (en) 2004-01-28 2014-03-04 Continental Automotive Italy S.P.A. Valve body and fluid injector with a valve body
EP2775133A1 (fr) * 2013-03-06 2014-09-10 Delphi Automotive Systems Luxembourg SA Un moyen de protection pour une buse d'injecteur

Also Published As

Publication number Publication date
DE10130684A1 (de) 2003-02-06

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