EP0890732A2 - Soupape à commande électromagnétique - Google Patents

Soupape à commande électromagnétique Download PDF

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Publication number
EP0890732A2
EP0890732A2 EP98104630A EP98104630A EP0890732A2 EP 0890732 A2 EP0890732 A2 EP 0890732A2 EP 98104630 A EP98104630 A EP 98104630A EP 98104630 A EP98104630 A EP 98104630A EP 0890732 A2 EP0890732 A2 EP 0890732A2
Authority
EP
European Patent Office
Prior art keywords
valve
connecting part
closing body
opening
valve according
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.)
Withdrawn
Application number
EP98104630A
Other languages
German (de)
English (en)
Other versions
EP0890732A3 (fr
Inventor
Hubert Stier
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 EP0890732A2 publication Critical patent/EP0890732A2/fr
Publication of EP0890732A3 publication Critical patent/EP0890732A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M51/0682—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 the body being hollow and its interior communicating with the 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
    • 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
    • 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
    • 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
    • F02M61/166—Selection of particular materials

Definitions

  • the invention is based on an electromagnetic actuatable valve according to the preamble of the main claim.
  • the electromagnetically actuated valve according to the invention with the characteristic features of the main claim has the Advantage that it is particularly simple is inexpensive to manufacture.
  • a connecting part Plastic By using a connecting part Plastic, the valve needle has a low needle mass, which achieves high valve dynamics.
  • flow openings are provided, the first downstream of a guide portion of the connecting part open at its outer contour. Because in the area of Guide surface no medium flow takes place, the Guide section very simple without webs, grooves, channels or the like are formed.
  • the connecting part in an end area for reaching around of the valve closing body shaped such that it in downstream direction over the equator of the protrudes spherical valve closing body.
  • a valve needle is particularly advantageous a connecting part made of plastic by by partially encapsulating the anchor and the Valve closing body in the formation of the connecting part the solid ones in a plastic injection mold Connections between the valve needle components achieved become.
  • Electromagnetically actuated valve is in the drawing shown in simplified form and in the following Description explained in more detail.
  • Valve in the form of an injector for Fuel injection systems from mixture-compressing, spark-ignited internal combustion engines has one of one Magnetic coil 1 surrounded, as an inner pole and partially as Fuel flow serving largely tubular Core 2. Together with an upper, disc-shaped Cover 3 allows the core 2 a particular compact design of the injection valve in the area of Magnetic coil 1.
  • the magnetic coil 1 is from an outer, surrounded ferromagnetic valve jacket 5 as the outer pole, the completely surrounds the magnetic coil 1 in the circumferential direction and at its upper end firmly with the cover 3 z. B. is connected by a weld 6.
  • To close the magnetic circuit is the valve jacket 5 on his lower end stepped, so that a guide section 8th is formed, which is similar to the cover 3 Magnetic coil 1 axially encloses and the limitation of Magnetic coil area 1 down or in downstream direction.
  • the guide section 8 of the valve jacket 5, the solenoid 1 and the cover 3 form an inner, concentric an opening 11 or 11 ', a valve longitudinal axis 10, in which an elongated sleeve 12 extends.
  • a inner longitudinal opening 9 of the ferritic sleeve 12 is used partially as a guide opening for one along the Longitudinal valve axis 10 axially movable valve needle 13.
  • Die Sleeve 12 is therefore the inner diameter of the inner opening 9 made to size.
  • the sleeve 12 ends in seen in the downstream direction, for example in the area of the guide section 8 of the valve jacket 5 with which it for example, is firmly connected to a weld seam 14.
  • the sleeve 12 In addition to the axially movable valve needle 13 is also the fixed core 2 in the longitudinal opening 9 of the sleeve 12 arranged.
  • the sleeve 12 also fulfills one Sealing function so that a dry one in the injection valve Solenoid 1 is present. This is also achieved by the fact that the disk-shaped cover element 3, the magnet coil 1 completely covered on its upper side.
  • the inner one Opening 11 'in the cover element 3 allows the sleeve 12 and thus also the core 2 is extended so that both Components protruding through the opening 11 'over the cover element 3 can stand out.
  • valve seat body 15 Closes at the lower guide section 8 of the valve jacket 5 a valve seat body 15, which is a fixed Has valve seat surface 16 as a valve seat.
  • the valve needle 13 is one tubular anchor 20, one as a closing body carrier serving connecting part 21 and a spherical Valve closing body 22 is formed.
  • the end face of the valve seat body 15 can be a flat one Spray plate may be arranged in the drawing is not shown. The one in one Spray plate for example by eroding or Stamped molded orifices then close in the flow direction of a downstream of the valve seat surface 16 formed outlet opening 24 of the valve seat body 15 on.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a return spring 25 or closing the injection valve serves the electromagnetic circuit with the magnetic coil 1, the inner core 2, the outer valve jacket 5 and the armature 20.
  • the armature 20 is with the valve closing body 22nd end facing away from the core 2.
  • the spherical valve closing body 22 acts with the in Direction of flow tapering in the shape of a truncated cone Valve seat surface 16 of the valve seat body 15 together, the in the axial direction downstream of a guide opening 26 in Valve seat body 15 is formed.
  • the insertion depth of the core 2 in the injection valve is below other decisive for the stroke of the valve needle 13.
  • the one end position of the valve needle 13 is not at excited solenoid 1 by the system of Valve closing body 22 on the valve seat surface 16 of the Valve seat body 15 set while the other End position of the valve needle 13 when the solenoid coil 1 is excited by the installation of the armature 20 at the downstream end of the Kerns 2 results.
  • the stroke is adjusted by an axial Moving the core 2 in the sleeve 12, the corresponding the desired position subsequently firmly with the sleeve 12 is connected, whereby a laser welding to achieve a weld seam 27 is useful.
  • Flow bore 28 of the core 2 which is the supply of the Serves fuel in the direction of the valve seat surface 16 is in addition to the return spring 25, an adjusting sleeve 29 inserted.
  • the adjusting sleeve 29 is used to adjust the Spring preload of the adjoining the adjusting sleeve 29 Return spring 25, which in turn with their opposite side on the armature 20, whereby also a setting of the dynamic spray quantity with the Adjustment sleeve 29 takes place.
  • Such an injection valve is characterized by its particularly compact structure, so that a very small, Handy injection valve is created, the valve jacket 5 for example an outer diameter of only approx. 11 mm having.
  • the components described so far form one pre-assembled standalone assembly that functions as a functional part 30 can be called.
  • the finished and assembled functional part 30 has z. B. an upper one End face 32 on, for example, two Stick out contact pins 33.
  • the electrical Contact pins 33 that act as electrical connectors serve, the electrical contacting takes place Solenoid 1 and thus their excitation.
  • the tubular anchor 20 is, for example, as a turned part executed that an inner longitudinal bore 38 as a flow path as well as e.g. has multiple stepped outer contours.
  • a filter element 39 arranged that in addition to a fuel filter in the shown connecting part of the valve is provided.
  • the Filter element 39 designed as a second filter fulfills the Purpose, possibly when installing the valve inside the Valve kept dirt away from the seating area.
  • the filter element 39 in the longitudinal bore 38 of the armature 20 pressed in.
  • the filter element 39 can also be used in the connecting part 21 belonging to valve needle 13 Plastic can be integrated, for example is also injected.
  • annular guide surface 40 On the outer periphery of the armature 20 is an annular guide surface 40 is provided which the Guiding the axially movable valve needle 13 in the sleeve 12 serves.
  • a ferritic material (Chrome steel) manufactured anchor 20 has an upper, the core 2 facing stop surface 42 with a Wear protection layer is provided, for. B. is chrome-plated.
  • the spherical valve closing body 22 has one Ball equator running perpendicular to the longitudinal axis 10 of the valve 43 on which is seen in the downstream direction a lower end portion 44 of the connecting part 21 extends. In other words, it becomes more than one Hemisphere and thus the radius of the spherical Valve closing body 22 encompassed by the connecting part 21.
  • the connecting part 21 has an inner opening 46 which at its lower end facing the valve seat 16 in a dome-shaped recess 47 through the valve closing body 22 is completed.
  • valve closing body 22 Therefore already run upstream of the valve closing body 22 from the inner Opening 46 starting at least one, for example two up to eight channel-like flow openings 48 in a slant Flow section 49 of the connecting part 21 to whose outer contour to the fuel supply on Ensure valve seat 16.
  • the flow openings 48 extend corresponding to the flow section 49 e.g. at an angle to the longitudinal axis 10 of the valve, ie with a radial and an axial component. They can just as well Flow openings 48 also run completely radially be trained.
  • connection of anchor 20 and serving as closing body carrier connecting part 21 for example by clipping on or pressing on the Connection of connecting part 21 and valve closing body 22 e.g. by clipping, flanging or pressing in or by Pressing in and subsequent flanging achieved, whereby before all things the encompassing area downstream of the Ball equator 43 ensures a secure connection.
  • plastic injection mold both the armature 20 and the valve closing body 22 are at the same time overmoulded, that the valve needle 13 shown with the connecting part 21 is made of plastic.
  • each of the armature 20 and the valve closing body 22 also are injection molded around individually with the connecting part 21.
  • contours steps, shoulders, grooves dovetail-like undercuts, etc.
  • the connecting part 21 is at least in an upper, the Armature 20 facing guide section 50 made to size or reworked, since the annular outer contour of the Connection part 21 in this area with at least one Guide surface 51 next to the guide surface 40 of another Guidance of the axially movable valve needle 13 is used.
  • the valve needle 13 is guided in the Guide opening 26 opposite the valve seat body 15 and / or the valve jacket 5 at its guide section 8. Die Flow openings 48 only open downstream of the Guide section 50 on the outer contour of the Connecting part 21; the fuel supply towards Valve seat surface 16 is therefore completely separate from Guide section 50 of the connecting part 21.

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)
EP98104630A 1997-07-09 1998-03-14 Soupape à commande électromagnétique Withdrawn EP0890732A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997129304 DE19729304A1 (de) 1997-07-09 1997-07-09 Elektromagnetisch betätigbares Ventil
DE19729304 1997-07-09

Publications (2)

Publication Number Publication Date
EP0890732A2 true EP0890732A2 (fr) 1999-01-13
EP0890732A3 EP0890732A3 (fr) 2001-12-05

Family

ID=7835118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104630A Withdrawn EP0890732A3 (fr) 1997-07-09 1998-03-14 Soupape à commande électromagnétique

Country Status (2)

Country Link
EP (1) EP0890732A3 (fr)
DE (1) DE19729304A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0944769B1 (fr) * 1997-10-10 2003-05-07 Robert Bosch Gmbh Soupape d'injection de carburant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10215592C1 (de) * 2002-04-10 2003-05-15 Staiger Steuerungstech Ventil
DE102004053762B4 (de) * 2004-11-08 2013-10-10 Robert Bosch Gmbh Ventilnadel für Fluidventil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503224A1 (de) 1995-02-02 1996-08-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Einspritzventil für Kraftstoffeinspritzanlagen von Verbrennungsmotoren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3244290A1 (de) * 1981-12-11 1983-06-23 Aisan Kogyo K.K., Obu, Aichi Elektromagnetischer brennstoff-injektor
US4564145A (en) * 1982-08-04 1986-01-14 Aisan Kogyo Kabushiki Kaisha Electromagnetic fuel injector
JPS6287661A (ja) * 1985-10-15 1987-04-22 Diesel Kiki Co Ltd 電磁式燃料噴射弁

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503224A1 (de) 1995-02-02 1996-08-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Einspritzventil für Kraftstoffeinspritzanlagen von Verbrennungsmotoren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0944769B1 (fr) * 1997-10-10 2003-05-07 Robert Bosch Gmbh Soupape d'injection de carburant

Also Published As

Publication number Publication date
EP0890732A3 (fr) 2001-12-05
DE19729304A1 (de) 1999-01-14

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