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WO2013092892A1 - Soupape d'injection de carburant pour moteurs à combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
WO2013092892A1
WO2013092892A1 PCT/EP2012/076445 EP2012076445W WO2013092892A1 WO 2013092892 A1 WO2013092892 A1 WO 2013092892A1 EP 2012076445 W EP2012076445 W EP 2012076445W WO 2013092892 A1 WO2013092892 A1 WO 2013092892A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle needle
fuel injection
injection valve
valve according
sealing surface
Prior art date
Application number
PCT/EP2012/076445
Other languages
German (de)
English (en)
Inventor
Henning Kreschel
Kai Sutter
Andreas Rau
Andreas Gruenberger
Wilhelm Christ
Alexander VILLMANN
Matthias Horn
Thomas Schwarz
Wolfgang Stoecklein
Thomas Pauer
Stephan Amelang
Lorenz Zerle
Andreas Rettich
Markus Rueckle
Philipp Wachter
Marco Beier
Sven SIAUW
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 WO2013092892A1 publication Critical patent/WO2013092892A1/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
    • 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
    • F02M51/0667—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 acting as a valve or having a short 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
    • 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
    • F02M51/0689—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means and permanent magnets
    • F02M51/0692—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means and permanent magnets as valve or armature return 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
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0073—Pressure balanced valves

Definitions

  • the invention relates to a fuel injection valve, as it is preferably used for the injection of fuel directly into a combustion chamber of an internal combustion engine.
  • Fuel injection valves as used for the injection of fuel under high pressure in the combustion chambers of internal combustion engines, usually have a nozzle body in which a pressure chamber is formed. Fuel is introduced under high pressure into the pressure chamber and introduced into the combustion chamber through one or more injection openings.
  • a nozzle needle which is arranged longitudinally displaceable in the pressure chamber, wherein the nozzle needle has a sealing surface which cooperates for opening and closing of the injection openings with a seat surface, wherein only a single injection port can be provided.
  • the nozzle needle has a substantially conical sealing surface, which cooperates with a likewise conical valve seat.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage over that the nozzle needle can be moved directly with an electromagnet, which allows a fast movement of the nozzle needle and precise control of injection start and end of injection, even with several rapid successive fuel injections.
  • the seat surface is formed as a flat surface which surrounds the inlet openings of the injection openings, so that the injection openings are sealed directly at their inlet openings.
  • a large part of the sealing surface, which is formed on the nozzle needle pressurized pressure in the pressure chamber, so that a total of virtually equalizing the force of the nozzle needle is achieved in the longitudinal direction. Leave the forces necessary for the movement of the nozzle needle Apply through the electromagnet, the end of the nozzle needle remote from the combustion chamber serves as a plunger armature.
  • the seat is advantageously designed as a flat annular surface. This allows, in particular in conjunction with a sealing surface on the nozzle needle, which is formed as a flat end face, a simple seal and a plurality of injection openings, so that the total number of injection ports compared to the known injectors need not be reduced. If a plurality of annular surfaces are present, they are spaced apart so that the fuel can flow freely therebetween, whereby all injection ports are supplied with injection pressure during injection with sufficient fuel.
  • the end of the nozzle needle facing away from the sealing surface advantageously protrudes into the electromagnet and thus forms the plunger armature.
  • the electromagnet comprises for this purpose a coil which surrounds the nozzle needle, so that in the region of the nozzle needle, a magnetic field is generated, through which the nozzle needle is pulled into the coil when a corresponding current flows through the coil.
  • the end of the nozzle needle which projects into the electromagnet, be designed as a permanent magnet, wherein the permanent magnet is advantageously designed as a dipole magnet.
  • the nozzle needle moves in the longitudinal direction in its open or closed position.
  • FIG. 1 shows a longitudinal section through a schematically illustrated inventive fuel injection valve
  • FIG. 2 shows a further exemplary embodiment, the representation corresponding to that in FIG. 1, Figure 3 is an enlarged perspective view of the designated III
  • the fuel injection valve has a housing 1, which comprises a nozzle body 2 and a holding body 4, which are clamped with the interposition of a throttle plate 5 and an iron core 6 by means of a clamping nut 7 against each other, in the drawing, only the immediately adjacent to the iron core 6 part of Holding body 4 is shown.
  • a pressure chamber 3 is formed, in which via a formed in the holding body 4 high-pressure bore 25 through the iron core 6 and a connecting bore 26 in the throttle plate 5, can be introduced from a high-pressure fuel source, not shown here fuel.
  • a piston-shaped nozzle needle 10 is arranged longitudinally displaceable, the combustion chamber-side end face is ground flat and thus forms a flat sealing surface 18 which cooperates with a plurality of seating surfaces 20.
  • the seat surfaces 20 are formed as flat annular surfaces which surround the inlet openings 111 of a plurality of injection openings 11 formed in the nozzle body 2, as FIG. 3 shows in a perspective view of the detail of FIG.
  • the annular seat surfaces 20 are arranged in a common plane, so that upon contact of the sealing surface 18 on the seat surfaces 20 all injection ports 11 are sealed and sealed against the fuel in the pressure chamber 3.
  • the nozzle needle 10 is guided in the pressure chamber 3 in a guide section 23, wherein the fuel flow is made sure to the injection openings 11 by a plurality of poles 24 on the nozzle needle 10.
  • a closing spring 15 is arranged under pressure bias, which is designed as a helical compression spring and the nozzle needle 10 surrounds. By the closing spring 15, the nozzle needle 10 is pressed with a biasing force against the seat surface 20, so that the injection openings 11 remain closed even when the engine is switched off.
  • An annular seat 20 results when the injection opening 11 is perpendicular to the bottom of the pressure chamber 2.
  • the injection port 11 is made oblique, e.g. shown in Figure 2, at least the inlet opening 111 is not a circle, but an ellipse.
  • the outer contour of the seat 20 may be executed in this case, either also elliptical, or circular. In the latter case, the seat surface 20 is a surface with a circular outer contour and an elliptical inner contour.
  • the iron core 6 is part of an electromagnet 35, which further comprises a coil 37 which surrounds the longitudinal axis of the fuel injection valve and which is connected to electrical terminals 38, 39 which are surrounded by insulating sleeves 44.
  • the electrical connections 38, 39 are connected to lines 40, via which a current fed from a voltage source 42 can be passed through the coil.
  • the voltage source 42 consists, for example, of a voltage-supplied control unit, so that the coil current for controlling the injection can be switched on and off precisely and with very short switching times.
  • the polarity of the electromagnet 35 can be adjusted.
  • the nozzle needle end 110 opposite the sealing surface 18 projects through an opening in the throttle disk 5 into the coil space 36 formed in the iron core 6, the coil 37 being sealed against the coil space 36 by a non-magnetic sleeve 43.
  • the non-magnetic sleeve 43 also serves to prevent a magnetic short circuit of the electromagnet 35.
  • the fuel which is fed through the high-pressure bore 25 in the fuel injection valve, flows into the coil space 36 and thus surrounds the nozzle needle end 110th
  • the pressure chamber 3 is filled with fuel under high pressure when the fuel injection valve is in operation, so that the nozzle needle 10 is pressurized by the fuel pressure on all sides. Since also on the sealing surface 18 and on the injection openings 11 facing away from the end face of the nozzle needle 10 is a hydraulic Force acts by the fuel in the pressure chamber 3, the nozzle needle 10 as a whole is largely force balanced in the longitudinal direction, that is, that at most a small resultant force acts in the longitudinal direction. Since the seats 20 have only a very small area, they have virtually no impact on the balance of forces.
  • the electromagnet is energized.
  • the magnetic field generated within the coil space 36 pulls the nozzle needle 10 away from the seat surface 20, thus exposing the entrance openings 111, and fuel flows from the pressure space 3 into the injection openings 11 and is injected therefrom into a combustion chamber of the internal combustion engine.
  • the opening movement of the nozzle needle 10 continues either until it comes to rest with its Düsennade- lende 110 on the throttle plate 5, or the nozzle needle 10 is operated ballistically, that is, the direction of movement reverses, even before the nozzle needle 10th has arrived at the throttle plate 5.
  • the coil current can also be easily switched off, so that the nozzle needle 10 is closed solely by the force of the closing spring 15.
  • FIG. 2 shows another embodiment of the fuel injection valve according to the invention in the same illustration as in Fig. 1, wherein only the nozzle needle has been modified. It is thus dispensed with the representation of the components that are identical already shown in Fig. 1.
  • the nozzle needle 10 has at its nozzle needle end 110 to a permanent magnet 12 which is designed so that it protrudes with a part of its extension in the electromagnet 35.
  • the permanent magnet 12 is designed as a dipole magnet, wherein a pole forms the end of the nozzle needle 10.
  • the permanent magnet 12 thus forms an external magnetic field which, depending on the direction of the coil current, is the same or opposite to the field of the electromagnet 35.
  • FIG. 4 shows, in a cross section, the structure of the injection openings 11 and the associated seating surfaces 20.
  • Each injection opening 11 has an inlet opening 111, which is arranged inside the pressure space 2.
  • Each inlet opening 111 is surrounded by an annular seat surface 20, the outer diameter is not substantially greater than the diameter of the injection openings 11.
  • the seating surfaces 20 may be composed of annular surfaces whose outer diameter, for example, 300 ⁇ is and thus form a flat annular surface whose thickness is 100 ⁇ .
  • the size of the seats 20 must be adapted to the forces acting, so that there is no plastic deformation in this area.
  • the volume associated with the combustion chamber and filled with fuel in the injection valve shown here is limited to the volume of the injection openings 11.
  • high temperatures result, through which a part of the fuel with which the injection openings 11 are filled , burns.
  • this fuel since this fuel is not atomized, it burns only incomplete and flows with the exhaust gas flow from the combustion chamber.
  • the here with the combustion chamber related volume is extremely small, since the typical diameter of an injection port 11, which is usually designed as a cylindrical bore, only about 150 ⁇ amounts to a length of about 1 mm. The hydrocarbon emissions are thus reduced to a minimum and do not have to be removed by a complex exhaust aftertreatment from the exhaust gas.

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 munie d'un boîtier (1) comprenant un corps d'injecteur (2) et un corps de fixation (4). Une chambre de pression (2), dans laquelle est agencée de manière mobile longitudinalement une aiguille d'injecteur (10), est formée dans le boîtier (1). L'aiguille d'injecteur (10) coopère par sa surface d'appui (20) avec une surface d'étanchéité (18) assurant l'ouverture et la fermeture d'au moins un orifice d'injection (11), le ou les orifices d'injection (11) présentant un orifice d'entrée (111) dans la chambre de pression (2). Un électroaimant (35) est par ailleurs agencé dans le boîtier (1). La surface d'appui (20) forme une surface plane qui entoure l'orifice d'entrée (111) du ou des orifices d'injection (11), l'extrémité de l'aiguille d'injecteur (10) opposée à la surface d'étanchéité (18) coopérant avec l'électroaimant (35) et formant ainsi un induit plongeur magnétique permanent.
PCT/EP2012/076445 2011-12-21 2012-12-20 Soupape d'injection de carburant pour moteurs à combustion interne WO2013092892A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011089360.1 2011-12-21
DE201110089360 DE102011089360A1 (de) 2011-12-21 2011-12-21 Kraftstoffeinspritzventil für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
WO2013092892A1 true WO2013092892A1 (fr) 2013-06-27

Family

ID=47557092

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/076445 WO2013092892A1 (fr) 2011-12-21 2012-12-20 Soupape d'injection de carburant pour moteurs à combustion interne

Country Status (2)

Country Link
DE (1) DE102011089360A1 (fr)
WO (1) WO2013092892A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104343507A (zh) * 2014-10-29 2015-02-11 凯龙高科技股份有限公司 一种液力驱动式喷射装置
US10280888B2 (en) 2017-01-10 2019-05-07 Cpt Group Gmbh Solenoid valve for a fuel injection system, and high pressure fuel pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3071896B1 (fr) * 2017-10-02 2020-02-21 Delphi Technologies Ip Limited Valve avec clapet et siege de clapet aux dimensions stables
GB2625123A (en) * 2022-12-07 2024-06-12 Phinia Delphi Luxembourg Sarl Fuel injector

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982574A (ja) * 1982-10-30 1984-05-12 Toyota Motor Corp 内燃機関の燃料噴射弁
DE3704542A1 (de) * 1987-02-13 1988-08-25 Vdo Schindling Kraftstoff-einspritzventil
DE3733239A1 (de) * 1987-09-15 1989-03-30 Colt Ind Inc Fluessigkeitsventil und kraftstoff-dosiervorrichtung
EP1801410A1 (fr) * 2002-10-26 2007-06-27 Robert Bosch Gmbh Soupape de commande d'un fluide
DE102006058073A1 (de) * 2006-04-19 2007-10-25 Robert Bosch Gmbh Magnetventil für ein Kraftstoffeinspritzsystem
DE102007032741A1 (de) 2007-07-13 2009-01-15 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102009045486A1 (de) 2009-10-08 2011-04-14 Robert Bosch Gmbh Kraftstoff-Injektor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982574A (ja) * 1982-10-30 1984-05-12 Toyota Motor Corp 内燃機関の燃料噴射弁
DE3704542A1 (de) * 1987-02-13 1988-08-25 Vdo Schindling Kraftstoff-einspritzventil
DE3733239A1 (de) * 1987-09-15 1989-03-30 Colt Ind Inc Fluessigkeitsventil und kraftstoff-dosiervorrichtung
EP1801410A1 (fr) * 2002-10-26 2007-06-27 Robert Bosch Gmbh Soupape de commande d'un fluide
DE102006058073A1 (de) * 2006-04-19 2007-10-25 Robert Bosch Gmbh Magnetventil für ein Kraftstoffeinspritzsystem
DE102007032741A1 (de) 2007-07-13 2009-01-15 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102009045486A1 (de) 2009-10-08 2011-04-14 Robert Bosch Gmbh Kraftstoff-Injektor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104343507A (zh) * 2014-10-29 2015-02-11 凯龙高科技股份有限公司 一种液力驱动式喷射装置
US10280888B2 (en) 2017-01-10 2019-05-07 Cpt Group Gmbh Solenoid valve for a fuel injection system, and high pressure fuel pump

Also Published As

Publication number Publication date
DE102011089360A1 (de) 2013-06-27

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