EP0886727B1 - Elektromagnetisch betätigbares ventil - Google Patents

Elektromagnetisch betätigbares ventil Download PDF

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Publication number
EP0886727B1
EP0886727B1 EP97947009A EP97947009A EP0886727B1 EP 0886727 B1 EP0886727 B1 EP 0886727B1 EP 97947009 A EP97947009 A EP 97947009A EP 97947009 A EP97947009 A EP 97947009A EP 0886727 B1 EP0886727 B1 EP 0886727B1
Authority
EP
European Patent Office
Prior art keywords
core
layer
armature
valve
layer thickness
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
EP97947009A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0886727A1 (de
Inventor
Markus Gesk
Norbert Keim
Joachim Stilling
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 EP0886727A1 publication Critical patent/EP0886727A1/de
Application granted granted Critical
Publication of EP0886727B1 publication Critical patent/EP0886727B1/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
    • 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
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention is based on an electromagnetically actuated Valve according to the genus of the main claim. It are already different electromagnetically operated Valves, in particular fuel injection valves, where wear-resistant components with wear-resistant Layers are provided.
  • EP-OS 0 536 773 also discloses a fuel injector known, at the anchor on its cylindrical Circumferential surface and an annular stop surface Hard metal layer is applied by electroplating.
  • This layer of chrome or nickel has, for example a thickness of 15 to 25 ⁇ m.
  • the galvanic Coating results in a slightly wedge-shaped layer thickness distribution, being minimal on the outer edges thicker layer is reached.
  • the galvanically separated Layers is the layer thickness distribution physically predefined and can hardly be influenced.
  • the electromagnetically actuated valve according to the invention with the characterizing features of the main claim has the advantage that an inexpensive stop area is created in a simple manner.
  • the measure according to the invention of applying a thicker wear protection layer to the stationary core than to the axially moving armature it is also possible to increase the magnetic force of the electromagnetic circuit of the valve. Since the spread is reduced in the case of coatings of a galvanic type with smaller setpoints for the layer thicknesses, this results in functionally lower residual air gap fluctuations in the core / armature area. This advantageously reduces the fluctuations in the fuel quantities to be sprayed q dyn , while the values of the minimum tightening voltage increase.
  • the wear on the moving anchor is significantly less than on the stationary core and thus the wear protection layer on the anchor with significantly reduced thickness without loss of quality run at the endurance stability can result in a not insignificant saving Coating material.
  • Another advantage is the lower spread of the Anchor diameter, which is due to the resulting less leadership game particularly favorable on that Wear behavior affects.
  • FIG. 1 shows a fuel injection valve
  • FIG. 2 shows an enlarged stop of the Injector in the core and anchor area with Wear protective layers.
  • the electromagnetic shown in Figure 1 for example actuatable valve in the form of an injection valve for fuel injection systems of mixture compression, spark-ignited internal combustion engines has one of a magnetic coil 1 surrounding, as a fuel inlet connector serving core 2, which is, for example, tubular and is constant over its entire length Has outer diameter.
  • a fuel inlet connector serving core 2 which is, for example, tubular and is constant over its entire length Has outer diameter.
  • stepped bobbin 3 takes a winding of Magnet coil 1 and in connection with the Core 2 is a particularly compact design of the injection valve in the area of the magnetic coil 1.
  • a tubular metal Intermediate part 12 connected for example by welding and partially surrounds the core end 9 axially.
  • the stepped bobbin 3 partially overlaps the core 2 and with a step 15 of larger diameter, the intermediate part 12 at least partially axially.
  • a tubular valve seat support 16 Downstream of the Coil body 3 and the intermediate part 12 extends a tubular valve seat support 16, for example is firmly connected to the intermediate part 12.
  • a longitudinal bore 17 which is concentric to the valve longitudinal axis 10 is formed.
  • a tubular valve needle 19 arranged at its downstream End 20 with a spherical valve closing body 21 the extent of which, for example, five flattenings 22 for Flowing past the fuel are provided, for example is connected by welding.
  • 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 core 2 and a sleeve-shaped anchor 27.
  • Der Armature 27 is connected to the valve closing body 21 opposite end of the valve needle 19 by a first Weld 28 connected and aligned to the core 2.
  • first Weld 28 connected and aligned to the core 2.
  • cylindrical valve seat body 29 In the downstream end facing away from the core 2 of the valve seat carrier 16 is in the longitudinal bore 17 cylindrical valve seat body 29, which has a fixed Has valve seat, tightly assembled by welding.
  • valve closing body 21 To guide the valve closing body 21 during the axial movement the valve needle 19 with the armature 27 along the Longitudinal valve axis 10 serves a guide opening 32 of the valve seat body 29.
  • the spherical valve closing body 21 acts with the shape of a truncated cone in the direction of flow tapered valve seat of the valve seat body 29 together.
  • the valve seat body 29 On its end facing away from the valve closing body 21 is the valve seat body 29 with, for example Pot-shaped spray plate 34 concentrically and firm, connected.
  • the spray plate 34 runs at least one, for example run four injection orifices formed by eroding or stamping 39th
  • the insertion depth of the valve seat body 29 with the pot-shaped spray plate 34 determines the setting of the stroke of the valve needle 19.
  • the one end position the valve needle 19 when the solenoid is not energized 1 by the installation of the valve closing body 21 on the valve seat of the valve seat body 29 set while the other end position of the valve needle 19 when the solenoid coil is excited 1 results from the installation of the armature 27 at the core end 9, so exactly in the area that is designed according to the invention, identified by a circle and in 2 is shown in a modified scale.
  • Flow bore 46 of the core 2 inserted adjusting sleeve 48 is used to adjust the Spring preload of the adjoining the adjusting sleeve 48 Return spring 25, which in turn with their opposite Supported on the valve needle 19.
  • the injection valve is largely with plastic encapsulation 50 enclosed, starting from the core 2 in axial direction via the solenoid coil 1 to the valve seat support 16 extends.
  • plastic encapsulation 50 belongs, for example, to a co-molded electric Connector 52.
  • a fuel filter 61 projects into the flow bore 46 of the Core 2 at its inlet end 55 and provides for filtering out such fuel components, which due to their size in the injector blockages or could cause damage.
  • FIG. 2 the one marked with a circle in FIG. 1 is shown Range of one end position of the valve needle 19, in which the armature 27 at the core end 9 of the core 2 strikes, shown on a different scale.
  • metallic layers 65 on the core end 9 of the core 2 and on the anchor 27, for example of chrome or nickel layers, by means of electroplating.
  • Layers 65 and 65 ' are both on perpendicular to the valve longitudinal axis 10 end faces 67 and 67 'as well as at least partially Circumferential surfaces 66 and 66 'of armature 27 and core 2, respectively applied.
  • the layers 65 which are usually Layer thicknesses between 10 and 25 microns are in Figure 2 with its layer thicknesses not to scale Size of components 2 and 27 shown.
  • the stop partners should have the most exact possible stop surfaces, so that the pull-in and drop-out times of the armature 27 remain almost constant, despite a slight wear on the layers 65 and 65 '.
  • the tolerances of the fuel quantities to be sprayed q dyn can also be kept very closely in an advantageous manner.
  • the endurance test shows that the moving component armature 27 wears less than the stationary component core 2.
  • the depth of wear at layers 65 and 65 'that results after many years can be achieved at core 2, e.g. B. be two to three times the size of the armature 27.
  • layer thickness x and y for the layers 65 and 65 ' should be 7 ⁇ m for the Core 2 and 4 microns for the anchor 27 are called. These dimensions are of course subject to tolerance within narrow limits. The size information is only for better understanding and do not limit the invention in any way.
  • layer thickness x of the layer 65 'of the resting one Core 2 clearly above the layer thickness y of layer 65 of the axially moving armature 27, which means that the Layer thickness x of the layer 65 'of the core 2 die Layer thickness y of layer 65 of armature 27 by at least Exceeds 25%.
  • This information only applies to the immediate stop area a or a 'on the core 2 and on Armature 27, whose axial approach area with a Double arrow is marked.
  • the stop area a, a ' is the contact point that actually wears out (contact area of the two stop partners), who ideally circular and usually crescent-shaped, d. H. annular segment-shaped.
  • the stop area a, a ' has a stop width of 50 to 200 ⁇ m, with maximum widths of 300 ⁇ m still are conceivable.
  • the layers 65 and 65 ' are also wedge-shaped, that the respective opposite layer thicknesses largely align.
  • it has Layer 65 on anchor 27, however, consistently a smaller one Layer thickness y as the layer thickness x of layer 65 'am Core 2; x> y applies, in particular at the stop area a, a '.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fluid-Driven Valves (AREA)
EP97947009A 1996-12-24 1997-10-18 Elektromagnetisch betätigbares ventil Expired - Lifetime EP0886727B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19654322A DE19654322C2 (de) 1996-12-24 1996-12-24 Elektromagnetisch betätigbares Ventil
DE19654322 1996-12-24
PCT/DE1997/002406 WO1998028537A1 (de) 1996-12-24 1997-10-18 Elektromagnetisch betätigbares ventil

Publications (2)

Publication Number Publication Date
EP0886727A1 EP0886727A1 (de) 1998-12-30
EP0886727B1 true EP0886727B1 (de) 2003-01-22

Family

ID=7816181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97947009A Expired - Lifetime EP0886727B1 (de) 1996-12-24 1997-10-18 Elektromagnetisch betätigbares ventil

Country Status (9)

Country Link
US (1) US5996911A (ko)
EP (1) EP0886727B1 (ko)
JP (1) JP2000505863A (ko)
KR (1) KR100573503B1 (ko)
CN (1) CN1084844C (ko)
AT (1) ATE231585T1 (ko)
DE (2) DE19654322C2 (ko)
ES (1) ES2191204T3 (ko)
WO (1) WO1998028537A1 (ko)

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JP6205482B2 (ja) * 2014-03-14 2017-09-27 日立オートモティブシステムズ株式会社 電磁式弁
JP5862713B2 (ja) * 2014-06-27 2016-02-16 株式会社デンソー 燃料噴射弁
JP5862712B2 (ja) * 2014-06-27 2016-02-16 株式会社デンソー 燃料噴射弁
JP6137296B2 (ja) * 2015-12-22 2017-05-31 株式会社デンソー 燃料噴射弁
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CN209164045U (zh) * 2018-11-19 2019-07-26 浙江锐韦机电科技有限公司 泵阀一体机构
JP6788085B1 (ja) * 2019-09-20 2020-11-18 株式会社ケーヒン 電磁式燃料噴射弁
JP2023526220A (ja) 2020-05-14 2023-06-21 ホートン， インコーポレイテッド 粘性摩擦クラッチの弁制御システム

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CN1084844C (zh) 2002-05-15
DE19654322C2 (de) 1999-12-23
US5996911A (en) 1999-12-07
EP0886727A1 (de) 1998-12-30
WO1998028537A1 (de) 1998-07-02
KR19990082045A (ko) 1999-11-15
ES2191204T3 (es) 2003-09-01
ATE231585T1 (de) 2003-02-15
DE19654322A1 (de) 1998-06-25
KR100573503B1 (ko) 2006-08-10
DE59709194D1 (de) 2003-02-27
CN1212040A (zh) 1999-03-24
JP2000505863A (ja) 2000-05-16

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