EP0862781B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP0862781B1
EP0862781B1 EP97909180A EP97909180A EP0862781B1 EP 0862781 B1 EP0862781 B1 EP 0862781B1 EP 97909180 A EP97909180 A EP 97909180A EP 97909180 A EP97909180 A EP 97909180A EP 0862781 B1 EP0862781 B1 EP 0862781B1
Authority
EP
European Patent Office
Prior art keywords
core
fuel injection
fuel
injection valve
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.)
Expired - Lifetime
Application number
EP97909180A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0862781A1 (de
Inventor
Dietrich Schuldt
Ferdinand Reiter
Martin Müller
Bo Yuan
Andreas Eichendorf
Christiane Glumann
Thomas Sebastian
Gerhard Stokmaier
Rainer Norgauer
Christian Preussner
Rainer Schneider
Norbert Keim
Ottmar Martin
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 EP0862781A1 publication Critical patent/EP0862781A1/de
Application granted granted Critical
Publication of EP0862781B1 publication Critical patent/EP0862781B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/08—Cores, Yokes, or armatures made from powder
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/07—Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
    • 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
    • F02M2200/9092—Sintered materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1676—Means for avoiding or reducing eddy currents in the magnetic circuit, e.g. radial slots

Definitions

  • the invention is based on a fuel injector according to the genus of claim 1 and claim 2.
  • Fuel injection valves are already known are electromagnetically actuated and thus a magnetic circuit have at least one magnetic coil, one core, one Anchor and an outer pole includes.
  • Such fuel injectors are already in the scriptures, for example DE-OS 30 16 993, DE-PS 32 30 844, DE-PS 37 33 809, DB-PS 40 03 227 and DE-OS 195 03 821 shown and described.
  • ferromagnetic (soft magnetic) Materials used for the solid, one-piece compact design Core (as well as for the movable anchor) come here usually ferromagnetic (soft magnetic) Materials used.
  • the z. B. as 13% Cr steel is used.
  • Such a ferritic Chrome steel is a good compromise because it does z. B.
  • the fuel injectors each have sleeves that contain the core in an inner Project through the longitudinal opening.
  • the sleeves serve the Setting the spring force of a return spring on which it act, or the stroke setting of an axially movable Valve needle. Because the sleeves have the core due to their function, the armature and the solenoid not from Completely shield the fuel flow path Fuel at all times via annular gaps between the sleeves and the magnetic circuit components down to the coil area penetrate. That is why sealing rings are in the area of the core surrounding magnetic coil provided the winding in front to protect a fuel contact. The core can however, be wetted by fuel at all times.
  • the fuel injector according to the invention with the characterizing features of claim 1 or claim 2 has the advantage that an eddy current minimized Magnetic circuit through a simple and inexpensive Use of materials with a lower tendency towards eddy currents is created for the core.
  • the Reduced switching times compared to known comparable Injectors are 15 to 50%.
  • low eddy current Materials are particularly soft magnetic Powder composite materials (composite materials) advantageous.
  • part of the magnetic circuit forming core from a solid, ferritic material to manufacture the core of several sectors into one Circular ring is composed and the individual sectors are electrically insulated from each other.
  • Another one Structure of the core has a lower eddy current tendency as known compact cores made of ferritic chrome steel, so that even in this case with the same quality of Magnet properties reduce the switching time of the valve is achieved.
  • the switching times and thus improving the linearity of the Fuel injector without simultaneous Magnetic force loss achieved Furthermore, the Energy utilization improves, which results in a lower Heating the magnetic coil and the possibility arises when Turn off the magnetic circuit energy for the next one Turn on to use. This in turn enables one simple and inexpensive layout of the controlling Realize power amplifier.
  • a powder composite iron powder provided with a polymer additive use in which the individual iron grains each with electrically insulating layers (phosphate layers) are covered. Due to the high electrical resistance there can hardly be any between the powder particles Form eddy currents. While on the iron grains phosphating to isolate the grains the polymer additive also serves to isolate the Grains and also the binding of the individual grains. This material structure enables the one already mentioned Low eddy current and the resulting very good Switching dynamics of the injection valve.
  • a through a longitudinal opening of the Kern's protruding and very encapsulating sleeve thin-walled from a rust-resistant austenitic steel e.g. V2A steel
  • the magnetic circuit effectiveness will very thin due to the thin-walled non-magnetic sleeve influenced, so that the positive magnetic properties of the materials with a low eddy current predominate significantly.
  • the core is on its lower face with an adjacent one Encapsulated pole part made of a ferritic material is trained. It is advantageous if both the sleeve and the pole part are made as thin as possible, the sleeve should be made of a material that one has higher magnetic resistance than the core and also has a higher magnetic resistance than the pole part.
  • Embodiments of the invention are in the drawing shown in simplified form and in the following Description explained in more detail.
  • 1 shows it Embodiment of a fuel injector with a magnetic circuit according to the invention
  • Figure 2 shows a second Embodiment of a magnetic circuit
  • Figure 3 shows a third Embodiment of a magnetic circuit
  • Figure 4 four Sealing options or connection techniques on one Magnetic circuit
  • Figure 5 shows a fourth embodiment of a Magnetic circuit
  • Figure 6 shows a section through a core along the line VI-VI in Figure 2, which consists of several Sectors is composed.
  • Embodiment shown electromagnetically actuatable valve in the form of an injection valve for Fuel injection systems from mixture-compressing, spark-ignited internal combustion engines has one of one Magnetic coil 1 at least partially surrounded, as an inner pole serving a magnetic circuit, according to the invention trained, tubular, largely hollow cylindrical Core 2.
  • the fuel injector is particularly suitable for injecting fuel directly into a combustion chamber an internal combustion engine.
  • a tiered one Coil body 3 receives a winding of the magnet coil 1 and enables in conjunction with the core 2 and one annular, non-magnetic, from the magnet coil 1 partially surrounded intermediate piece 4 with an L-shaped Cross section a particularly compact and short structure of the Injector in the area of the solenoid coil 1.
  • the Intermediate piece 4 projects axially with one leg Direction in a step 5 of the bobbin 3 and with other leg radially along one in the drawing below lying end face of the coil former 3.
  • the core 2 according to the invention consists of a powder composite material, the properties of which will be explained in detail later.
  • a continuous longitudinal opening 7 in the core 2 provided that extends along a longitudinal valve axis 8 extends. Is concentric to the longitudinal axis 8 of the valve likewise a thin-walled, tubular sleeve 10, which the protrudes through the inner longitudinal opening 7 of the core 2 and in downstream direction at least to a lower one End face 11 of the core 2 is introduced.
  • the sleeve 10 lies directly on the wall of the longitudinal opening 7 or has a game against it and owns one Sealing function to core 2. With the non-magnetic, z. B.
  • existing sleeve 10 is an annular disc ferritic pole part 13 firmly and tightly connected to the lower end face 11 of the core 2 and the core 2 in downstream direction limited.
  • the sleeve 10 and that Pole part 13, the z. B. formed as a pressed part and by means Welding or soldering is connected to the sleeve 10, form in the direction of the valve longitudinal axis 8 or in the downstream Direction of an encapsulation of the core 2, which is a contact of Fuel at core 2 effectively prevented.
  • the sleeve 10 also serves as a fuel supply channel, whereby it together with an upper metal (e.g. ferritic), the sleeve 10 largely surrounding a housing part 14 Fuel inlet port forms.
  • a through opening 15 is provided, for example the has the same diameter as the longitudinal opening 7 of the Core 2.
  • Sleeve 10 is next to the fixed connection to the pole part 13 also tight and firm with the housing part 14 z. B. by Welding or flanging at the upper end 16 of the sleeve 10 connected.
  • the housing part 14 forms the inlet end of the fuel injector and envelops the sleeve 10, the Core 2 and the magnetic coil 1 at least partially in the axial and radial direction and extends for example in seen in the axial direction downstream over the Magnetic coil 1 out.
  • a lower housing part 18 which, for. B. an axial movable valve part consisting of an armature 19 and a valve needle 20 or a valve seat support 21 encloses or records.
  • the two housing parts 14 and 18 are in the region of the lower end 23 of the upper housing part 14 z. B. with a circumferential weld firmly together connected.
  • valve seat support 21 has its own total axial extent an inner through opening 24, which runs concentrically to the valve longitudinal axis 8. With its lower end 25, which also the downstream completion of the whole Fuel injector, surrounds the Valve seat carrier 21 one in the through opening 24 fitted valve seat body 26. In the through opening 24 is the z. B. rod-shaped, a circular Cross-sectioned valve needle 20 arranged on a valve closing section 28 at its downstream end having.
  • This tapered cone Valve closing section 28 acts in a known manner with a provided in the valve seat body 26, in Flow direction z. B. frustoconical Valve seat surface 29 together in the axial direction downstream of one located in the valve seat body 26 Guide opening 30 is formed. Downstream of the Valve seat surface 29 is or are in valve seat body 26 at least one, e.g. B. but also two or four Outlet openings 32 are introduced for the fuel. In the Guide opening 30 or in the valve needle 20 are not represented flow areas (depressions, grooves or similar) provided an unimpeded Fuel flow from the passage opening 24 to the Ensure valve seat surface 29.
  • valve seat support 21 represents only one possible Design variant of the magnetic circuit downstream following valve assembly.
  • this valve area is dispensed with, emphasizing should be that the most diverse valve assemblies together with the formation of the core 2 according to the invention can be combined.
  • inside opening injection valves e.g. US Pat. No. 5,247,918
  • valve assemblies of an outward opening Injector as z. B. from U.S. Patent 4,958,771 are known or in the patent application DE-P 196 01 019.5 have been proposed along with the new one Magnetic circuit design can be used.
  • spherical Valve closing bodies or spray perforated disks are e.g. B. in such valve assemblies conceivable.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a return spring 33 arranged inside the sleeve 10 or closing the injection valve is used electromagnetic circuit with the magnetic coil 1, the core 2, the pole part 13 and the armature 19.
  • the armature 19 is with the the valve closing section 28 facing away from the Valve needle 20 z. B. connected by a weld and aligned to core 2.
  • To guide the valve needle 20 during their axial movement with the armature 19 along the longitudinal valve axis 8 serves the guide opening 30 of Valve seat body 26.
  • the armature 19 is during the Axial movement in the precisely manufactured non-magnetic Intermediate piece 4 out.
  • pole part 13 and lower housing part 18 may alternatively to the described separate Execution of pole part 13 and lower housing part 18 also a one-piece version will be provided, in which the Pole part 13 starting from a circumferential, narrow web 35 in extends in the axial direction as a transition to the housing part 18 and all sections together (pole part 13, sleeve-shaped Web 35, lower housing part 18) a ferritic component form.
  • the inner boundary surface then serves accordingly of the web 35 as a guide for the armature 19.
  • a concentric to the valve longitudinal axis 8 inner flow bore 37 of the sleeve 10 which the supply of Serves fuel in the direction of the valve seat surface 29 is an adjusting sleeve 38 inserted, pressed or screwed.
  • the adjustment sleeve 38 is used for adjustment the spring preload of the adjoining the adjusting sleeve 38 Return spring 33, which in turn with her opposite side at a paragraph 39 of the at the Valve needle 20 supported armature 19 supports.
  • At anchor 19 are one or more ring-shaped or bore-like Flow channels 40 are provided through which the fuel from the flow bore 37 out into the through opening 24 can reach.
  • a fuel filter 42 protrudes on the inlet side into that for filtering out such Fuel components ensures that due to their size in Injector blockages or damage could cause.
  • the fuel filter 42 is e.g. B. by Pressing fixed in the housing part 14.
  • the stroke of the valve needle 20 is through the valve seat body 26 and the pole part 13 specified.
  • a final position of the Valve needle 20 is through when the magnet coil 1 is not energized the installation of the valve closing section 28 on the Valve seat surface 29 of the valve seat body 26 fixed, while the other end position of the valve needle 20 at excited solenoid 1 by the system of the armature 19 on the Pole part 13 results.
  • the surfaces of the components in this The stop area is chrome-plated, for example.
  • the electrical contacting of the magnetic coil 1 and thus their excitation takes place via contact elements 43, which also outside the actual coil body 3 made of plastic are still provided with a plastic extrusion 45.
  • the Plastic encapsulation can also affect other components (e.g. housing parts 14 and 18) of the Extend fuel injector.
  • From the Plastic extrusion 45 runs an electrical Connection cable 44, via which the energization of the magnet coil 1 he follows.
  • a particularly advantageous embodiment of the core 2 shows the figure 1.
  • the core 2 is tubular, but not with a constant outside diameter.
  • the core has only in the area of the plastic encapsulation 45 2 a constant over its entire axial extent Outer diameter.
  • the core 2 Outside the plastic extrusion 45 is the core 2 with a radially outwardly facing collar 46 designed, which is partly like a lid over the Magnetic coil 1 extends.
  • the plastic extrusion 45 protrudes thus by a groove in the collar 46. Since the core 2 from one Eddy current reducing material, e.g. B. one Powder composite material, this version is for Achieving a very effective magnetic circuit especially meaningful.
  • the iron powder has one very small graininess, with the individual iron grains with a very thin, electrically insulating Phosphate layer are coated.
  • the powder is also included one e.g. 0.5% by mass of polymer additive (e.g. polyamide, Phenolic resin, etc.), which has an electrically insulating effect and binds the grains. Due to the high electrical Resistance between the powder particles of such powder metallurgical, "baked" composite material there can hardly be any eddy currents.
  • a powder composite such as inexpensive to manufacture, simple Manageability and precise machinability (e.g. Production of an internal press fit for the longitudinal opening 7 in the core 2) and good adhesive properties.
  • the advantage is that the magnetic properties despite reduced eddy current tendency compared to the known Magnetic circuit materials are comparably good.
  • the non-magnetic sleeve 10 is very thin-walled to ensure the good magnetic properties make the best possible use of the composite material.
  • the Encapsulation and mechanical relief of the low eddy current Material of the core 2 by a flux-conducting, ferritic Pole part 13 and a non-magnetic, eddy current-free sleeve 10 avoids the disruption and erosion of the mechanically sensitive composite.
  • FIG. 2 to 5 are different Embodiments of the novel magnetic circuit for Fuel injectors shown. As already mentioned, is in the representations on the spray side Valve assemblies are omitted because they are not are essential to the invention. In these embodiments the following figures are those compared to that in FIG. 1 illustrated embodiment constant or equivalent parts by the same reference numerals characterized. Only those compared to the embodiment Components modified or changed according to Figure 1 described in more detail below.
  • FIG. 2 shows a fuel injector partially, the one tubular core 2 with largely constant Has outer diameter, which is not radially behind outside, one partially covering the magnetic coil 1 Has collar 46. Rather, the core 2 is on, for example its lower end face 11 is stepped, from which now dimensionally accurate in cross-section L-shaped pole part 13 to be enclosed.
  • the pole part 13 has namely its radially outer, the sleeve 10 opposite Boundary side a circumferential, upward-facing Collar 48, the z. B. axially flush with the intermediate piece 4th concludes.
  • the core 2 is still on it outer, the magnetic coil 1 facing peripheral surface partially included.
  • the adjusting sleeve 38 is for example Screwing or caulking introduced in the housing part 14 and pushes with an elongated, downstream tapered sleeve section 52 against the return spring 33.
  • the sleeve 10 is compared to that shown in Figure 1 Embodiment is shortened. Your axial Extension extends from a housing shoulder 53 Longitudinal opening 7 near the upper end face 50 of the core 2 to the downstream boundary surface of the pole part 13.
  • a fuel injector is partial shown, which has a very short sleeve 10, the has only a slightly larger axial extent than the core 2, which is circular with both constant Inside diameter as well as constant outside diameter is executed.
  • the sleeve 10 stands up without overlap the pole part 13, which is not an optimal tight connection allowed.
  • the housing part 14 is made in two parts, a first housing part 14a largely one Fuel inlet port forms and a second housing part 14b illustrates a magnet housing.
  • the housing part 14b has a cover section 63 covering the magnetic coil 1, which also extends over the core 2 to the sleeve 10 and thus closes the core 2 at the top.
  • a section through a core 2, for example, along the Line VI-VI in Figure 2 shows Figure 6.
  • This sectional view is already an alternative Embodiment.
  • This is not one Powder composite in the sense described above as Material for the core 2, but a solid (pure), ferritic material.
  • the core 2 is in this training formed from several, for example four, sectors 65 which put together form a complete circular ring.
  • Condition for achieving the positive effect of Eddy current minimization is at least a split in two Core 2; it is also e.g. six, eight or ten sectors 65 conceivable.
  • the ratio of the circumference to the area of the Core 2 by the plurality of electrically isolated from each other Sectors 65 enlarged.
  • Measures for this are as thin a pole part 13 and a sleeve 10 as possible higher magnetic resistance than the materials of the Sectors 65 or that of the powder composite material, so that no appreciable magnetic flux into the sleeve 10 penetrates, which could otherwise generate eddy currents there.
  • the materials of the sleeve 10 should always be one have higher magnetic resistance than the materials of the pole part 13.
  • the encapsulation of the core 2 is not only with solid, metallic components, such as the Sleeve 10 and the pole part 13 must be done. Further Ways of protecting core 2 from one Fuel wetting is made of thin-walled plastic components which e.g. can form the sleeve 10. Besides that is too an at least partial encapsulation of the core 2 by Application of electrolytic layers or a resin conceivable.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP97909180A 1996-09-24 1997-09-24 Brennstoffeinspritzventil Expired - Lifetime EP0862781B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19639117A DE19639117A1 (de) 1996-09-24 1996-09-24 Brennstoffeinspritzventil
DE19639117 1996-09-24
PCT/DE1997/002160 WO1998013837A1 (de) 1996-09-24 1997-09-24 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP0862781A1 EP0862781A1 (de) 1998-09-09
EP0862781B1 true EP0862781B1 (de) 2003-03-19

Family

ID=7806688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97909180A Expired - Lifetime EP0862781B1 (de) 1996-09-24 1997-09-24 Brennstoffeinspritzventil

Country Status (7)

Country Link
US (1) US6244526B1 (ru)
EP (1) EP0862781B1 (ru)
JP (1) JP2000501570A (ru)
KR (1) KR19990071489A (ru)
DE (2) DE19639117A1 (ru)
RU (1) RU2193685C2 (ru)
WO (1) WO1998013837A1 (ru)

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JP3631413B2 (ja) * 2000-04-27 2005-03-23 株式会社デンソー 電磁弁及びそれを用いた燃料噴射装置
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DE10256662A1 (de) 2002-12-04 2004-06-17 Robert Bosch Gmbh Brennstoffeinspritzventil
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JP2005139943A (ja) * 2003-11-05 2005-06-02 Mitsubishi Materials Corp 電磁石用コア及びその製造方法
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DE102009047525A1 (de) 2009-12-04 2011-06-09 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
DE102010038437B4 (de) 2010-07-27 2022-08-25 Robert Bosch Gmbh Magnetaktor und Verfahren zur Herstellung eines einstückigen Polkerns für einen Magnetaktor
DE102010037922A1 (de) 2010-10-01 2012-04-05 Contitech Vibration Control Gmbh Aktor
DE102011080355A1 (de) * 2011-08-03 2013-02-07 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102011053289A1 (de) * 2011-09-06 2013-03-07 Contitech Vibration Control Gmbh Aktor
DE102013206958A1 (de) 2013-04-17 2014-10-23 Robert Bosch Gmbh Magnetventil mit verbessertem Öffnungs- und Schließverhalten
EP2863043B1 (en) * 2013-10-15 2017-01-04 Continental Automotive GmbH Fuel injector
DE102013223530A1 (de) * 2013-11-19 2015-05-21 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
US9812248B2 (en) * 2014-06-16 2017-11-07 Delphi Technologies, Inc. Ignition coil
ITBO20150235A1 (it) * 2015-05-05 2016-11-05 Magneti Marelli Spa Iniettore elettromagnetico di carburante con ottimizzazione delle saldature
DE102016205102B4 (de) 2015-12-17 2022-01-05 Robert Bosch Gmbh Ventil in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems und Hochdruckpumpe eines Kraftstoffeinspritzsystems mit diesem Ventil
DE102016203516A1 (de) * 2016-03-03 2017-09-07 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
EP3354437A1 (de) * 2017-01-25 2018-08-01 Continental Automotive GmbH Elektromagnetisches schaltventil sowie kraftstoffhochdruckpumpe
GB2577072B (en) * 2018-09-12 2021-04-21 Delphi Automotive Systems Lux Pole piece retention and insertion method

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JP2000501570A (ja) 2000-02-08
KR19990071489A (ko) 1999-09-27
WO1998013837A1 (de) 1998-04-02
DE59709572D1 (de) 2003-04-24
RU2193685C2 (ru) 2002-11-27
DE19639117A1 (de) 1998-03-26
EP0862781A1 (de) 1998-09-09
US6244526B1 (en) 2001-06-12

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