EP1068442B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1068442B1
EP1068442B1 EP99960933A EP99960933A EP1068442B1 EP 1068442 B1 EP1068442 B1 EP 1068442B1 EP 99960933 A EP99960933 A EP 99960933A EP 99960933 A EP99960933 A EP 99960933A EP 1068442 B1 EP1068442 B1 EP 1068442B1
Authority
EP
European Patent Office
Prior art keywords
valve
closing body
closing
fuel injection
flattening
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.)
Expired - Lifetime
Application number
EP99960933A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1068442A1 (de
Inventor
Werner Hanft
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 EP1068442A1 publication Critical patent/EP1068442A1/de
Application granted granted Critical
Publication of EP1068442B1 publication Critical patent/EP1068442B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • a fuel injector in the form of a Electromagnetically actuated valve from DE-PS 38 31 196 known in which a valve needle from an armature, a tubular connecting part and a spherical one Valve closing body is formed.
  • the connecting part is the armature and the valve closing body connected with each other, being as immediate Closing body carrier serves the connecting part with which the Valve closing body firmly connected by means of a weld seam is.
  • the connecting part has a variety of Flow openings through which fuel from a step out through the inner opening and outside the Connecting part to the valve closing body or to one interacting with the valve closing body Valve seat surface can flow.
  • the US-PS 4,483,485 is already a fuel injector removable, which is a valve needle with a spherical Has valve closing body.
  • the spherical Valve closing body can also be used with a horizontal Be flattened within the as Closing body carrier serving connecting part of the Valve needle extends.
  • To a fuel flow from a inner opening of the connecting part to the valve seat enable are in the wall of the connecting part either transverse openings or several in one end area Valve closing body provided open slot openings.
  • the valve needle is an additional manufacturing or Processing steps required, especially in the Closing body carrier introduced opening geometry for the Outflow of the fuel needed.
  • the fuel injector according to the invention with the characteristic features of the main claim has the Advantage that it is in a particularly simple way is inexpensive to manufacture.
  • This is a spherical Valve closing body with at least one axial Provide flattened extension component and firmly connected to a sleeve-shaped closing body carrier.
  • the striker body is very simple can be made rotationally symmetrical without affecting its Outside contour any opening geometries for the outlet of fuel are to be brought in. This eliminates all Editing steps for such additional Flow openings are usually required.
  • the closing body carrier engages around the end region Valve closing body in such a way that it corresponds to the number of the flattened one or more channels immediately forms the surface of the valve closing body through which Fuel coming freely from the inner longitudinal bore can flow towards a valve seat surface.
  • Optimal inflow becomes low manufacturing effort to the metering range of the valve.
  • a magnetic armature can be used in a particularly advantageous manner serve directly as a closing body support, so that together with the valve closing body a two-part Valve needle is present.
  • Such a valve needle is special easy and inexpensive to manufacture and has the reduced number of parts only one connection point on.
  • Embodiments of the invention are in the drawing shown in simplified form and in the following Description explained in more detail.
  • 1 shows it 2 according to the invention first embodiment of a valve needle
  • Figure 3 a symbolically illustrated fuel flow on one Valve needle according to Figure 2
  • Figure 4 a second Embodiment of a valve needle
  • Figure 5 a symbolically illustrated fuel flow on one
  • FIG. 1 shows fuel injection valve according to the invention in the shape 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 Largely tubular fuel flow serving 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 the lower end is stepped so that a guide section 8 is formed, the 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 element 3 form an inner, concentric a valve longitudinal axis 10 extending opening 11 or 58, in which extends an elongated sleeve 12.
  • An inner one Longitudinal opening 9 of the ferritic sleeve 12 partially serves as Guide opening for one along the valve longitudinal axis 10 axially movable valve needle 13.
  • 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 54.
  • the valve needle 13 is shown in FIG Embodiment of a tubular Closing body carrier 17, which also functions as a magnet armature, and a largely spherical valve closing body 18 educated. As shown in FIG. 6, the valve needle 13 also in three parts of an anchor 17 ', one Closing body support 17 and a valve closing body 18 be formed. Except for the axially movable valve needle 13 is also the fixed core 2 in the longitudinal opening 9 of the Sleeve 12 arranged. In addition to leading the Closing body carrier 17 or the receptacle of the core 2 the sleeve 12 also fulfills a sealing function, so that in Injection valve a dry solenoid 1 is present.
  • the inner opening 58 in Cover element 3 allows the sleeve 12 and thus the Core 2 extended to train, so that both components Opening 58 protrudes through the cover element 3 protrude.
  • valve seat body 14 which is a fixed Has valve seat surface 15 as a valve seat.
  • the Valve seat body 14 is, for example, with a of a laser generated second weld 16 firmly with the Valve jacket 5 connected.
  • On the downstream end of the valve seat body 14 is, for. B. in a recess 19th a flat spray plate 20 is arranged, the fixed Connection of valve seat body 14 and spray orifice plate 20 z. B. realized by a circumferential dense weld 21 is.
  • the tubular closing body carrier 17 is on his downstream, the spray orifice plate 20 facing end with the spherical valve closing body 18, for example firmly connected by welding.
  • the closing body support 17 has an inner longitudinal bore 23 that of fuel is flowed through and from which it emerges downstream and in the area of at least one axial Flattening 24 having extension components directly along the valve closing body 18 to Valve seat 15 can flow.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a piezoelectric actuator for actuating the Valve needle 13 can be used.
  • 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 17.
  • the closing body support 17, which acts as an anchor, is included the end facing away from the valve closing body 18 onto the core 2 aligned.
  • the spherical valve closing body 18 interacts with the tapered in the direction of flow Valve seat surface 15 of the valve seat body 14 together, the in the axial direction downstream of a guide opening 26 in Valve seat body 14 is formed.
  • the spray hole disc 20 has at least one, for example four through Eroding or stamping shaped injection openings 27.
  • Flow bore 28 of the core 2 which is the supply of the Serves fuel in the direction of the valve seat surface 15 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 one firmly with the Closing body carrier 17 supports insert part 31, also adjusting the dynamic spray rate with the adjusting sleeve 29.
  • 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 set and assembled functional part 30 has z. B. an upper one End face 32 on, for example, two Stick out contact pins 33.
  • Figure 2 shows the valve needle 13 in a compared to the Figure 1 enlarged scale.
  • the tubular Closing body carrier 17 is designed as a turned part, the one has multiple stepped outer contours.
  • On the outer circumference of the Closure body carrier 17 is, for example, an annular one Guide surface 40 shaped to guide the axially movable valve needle 13 in the sleeve 12 is used.
  • the for example from a ferritic material (chrome steel) manufactured closing body carrier 17 has an upper, the core 2 facing stop surface 42 with a Wear protection layer is provided, for. B. is chrome-plated.
  • the inner longitudinal bore 23 in the closing body carrier 17 has a largely circular cross section. Overall is the closing body carrier 17 in an advantageous manner executed rotationally symmetrical.
  • the largely spherical Valve closing body 18 has on its outer periphery at least one an axial extension component having flattening 24. With a downstream End region 46 surrounds the closing body carrier 17 Valve closing body 18, which is partially in the Longitudinal bore 23 of the closing body carrier 17 protrudes.
  • the at least one flat 24 is on the valve closing body 18 shaped in such a way that they fit into the longitudinal bore 23 extends. This ensures that at least one Channel 47 between the inner wall of the Closing body support 17 and the flat 24 exists, through which the supplied in the longitudinal bore 23 and on Valve closing body 18 along flowing fuel in Direction to the valve seat surface 15 is forwarded.
  • the angle of the flattened portion 24 to the valve longitudinal axis 10 is e.g. 12 to 25 °. However, there are other angles between 10 and 50 ° conceivable.
  • At the obliquely inclined flat 24 can be followed by a further flat 24 ' for example perpendicular, that is parallel to the longitudinal axis of the valve 10 runs.
  • FIG. 4 is a second embodiment Valve needle 13 shown, in which the opposite to that in Figure 2 illustrated embodiment constant or equivalent parts by the same reference numerals Marked are.
  • the valve needle 13 according to FIG. 4 is characterized in that the flat 24 is not is divided and consistently at a constant angle between 12 ° and 25 ° inclined to the valve longitudinal axis 10 extends over the spherical equator 49.
  • Figure 5 is symbolically shown with several arrows that at one such a design a more diversified fuel flow is made possible for a wider flow at the Valve seat 15 can be advantageous.
  • valve needle 13 shows Figure 6.
  • the valve needle 13 are the armature 17 'and the valve closing body 18 via one sleeve-shaped connecting part connected to each other, wherein the connecting part now forms the closing body support 17.
  • the connections on the valve needle 13 are e.g. made by welding.
  • Anchor acting closing body support 17 described Functions and geometrical relationships also apply to the closing body support 17, which represents a connecting part according to Figure 6.
  • the valve closing body 18 corresponds e.g. the of the exemplary embodiment according to FIG. 4 more than one flat 24 may be provided.

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)
EP99960933A 1998-12-02 1999-11-19 Brennstoffeinspritzventil Expired - Lifetime EP1068442B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19855568A DE19855568A1 (de) 1998-12-02 1998-12-02 Brennstoffeinspritzventil
DE19855568 1998-12-02
PCT/DE1999/003689 WO2000032926A1 (de) 1998-12-02 1999-11-19 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1068442A1 EP1068442A1 (de) 2001-01-17
EP1068442B1 true EP1068442B1 (de) 2003-09-03

Family

ID=7889720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99960933A Expired - Lifetime EP1068442B1 (de) 1998-12-02 1999-11-19 Brennstoffeinspritzventil

Country Status (6)

Country Link
US (1) US6357676B1 (ja)
EP (1) EP1068442B1 (ja)
JP (1) JP2002531751A (ja)
KR (1) KR100630606B1 (ja)
DE (2) DE19855568A1 (ja)
WO (1) WO2000032926A1 (ja)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052486A1 (de) * 2000-10-23 2002-05-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10054183A1 (de) * 2000-11-02 2002-05-29 Siemens Ag Einspritznadel mit elastischer Nadelspitze
DE10103932B4 (de) * 2001-01-30 2010-01-21 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10142302A1 (de) * 2001-08-29 2003-03-20 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10254681B4 (de) * 2002-11-22 2005-09-08 Siemens Ag Einspritzdüse und Einspritzverfahren, sowie ein Herstellungsverfahren für eine Einspritzdüse
JP2006233887A (ja) * 2005-02-25 2006-09-07 Denso Corp 燃料噴射弁
DE102010040916A1 (de) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102010040914A1 (de) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102010040910A1 (de) 2010-09-16 2012-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102011003926A1 (de) * 2011-02-10 2012-08-16 Robert Bosch Gmbh Ventil zum Steuern eines Fluids
JP6035647B2 (ja) * 2012-09-28 2016-11-30 株式会社ケーヒン 燃料噴射弁
JP6061074B2 (ja) * 2012-09-28 2017-01-18 株式会社ケーヒン 燃料噴射弁

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103868A (en) * 1976-12-29 1978-08-01 Elkhart Brass Manufacturing Co., Inc. Ball valve having an improved ball element design
US4483485A (en) * 1981-12-11 1984-11-20 Aisan Kogyo kabuskiki Kaisha Electromagnetic fuel injector
DE3316979C2 (de) * 1983-05-09 1986-10-23 Jürgen Dipl.-Ing. 8402 Neutraubling Guido Druckanschluß einer Kraftstoff-Einspritzleitung für Dieselmotoren
DE3825135A1 (de) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3831196A1 (de) 1988-09-14 1990-03-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE4018256A1 (de) 1990-06-07 1991-12-12 Bosch Gmbh Robert Elektromagnetisch betaetigbares brennstoffeinspritzventil
US5199648A (en) 1991-03-20 1993-04-06 Zexel Corporation Fuel injection valve
DE4123692C2 (de) * 1991-07-17 1995-01-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE4304804A1 (de) * 1993-02-17 1994-08-18 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
DE4312756A1 (de) * 1993-04-20 1994-10-27 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
DE4408875A1 (de) 1994-03-16 1995-09-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19712590A1 (de) * 1997-03-26 1998-10-01 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil

Also Published As

Publication number Publication date
DE59906870D1 (de) 2003-10-09
EP1068442A1 (de) 2001-01-17
KR100630606B1 (ko) 2006-10-04
JP2002531751A (ja) 2002-09-24
WO2000032926A1 (de) 2000-06-08
DE19855568A1 (de) 2000-06-08
KR20010034380A (ko) 2001-04-25
US6357676B1 (en) 2002-03-19

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