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WO2018114110A1 - Injecteur de carburant et procédé permettant de faire fonctionner un injecteur de carburant - Google Patents

Injecteur de carburant et procédé permettant de faire fonctionner un injecteur de carburant Download PDF

Info

Publication number
WO2018114110A1
WO2018114110A1 PCT/EP2017/078281 EP2017078281W WO2018114110A1 WO 2018114110 A1 WO2018114110 A1 WO 2018114110A1 EP 2017078281 W EP2017078281 W EP 2017078281W WO 2018114110 A1 WO2018114110 A1 WO 2018114110A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
magnet armature
fuel injector
magnet
stroke stop
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.)
Ceased
Application number
PCT/EP2017/078281
Other languages
German (de)
English (en)
Inventor
Oezguer Tuerker
Axel Schnaufer
Stefan Betz
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 WO2018114110A1 publication Critical patent/WO2018114110A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • 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
    • H01F7/088—Electromagnets; Actuators including electromagnets with armatures provided with means for absorbing shocks
    • 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
    • H01F7/1638—Armatures not 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs

Definitions

  • the invention relates to a fuel injector according to the preamble of
  • Claim 1 Furthermore, the invention relates to a method for operating a fuel according to the invention! njektors.
  • a fuel injector according to the preamble of claim 1 is known from DE 2013 212 238 A1 of the applicant.
  • the known fuel injector comprises a magnet armature, which is movable in the direction of the magnetic coil during the energization of a magnetic coil until the magnet armature bears axially against a stroke stop formed in the form of a residual air gap disk.
  • the movement of the magnet armature serves to control the outflow of pressure medium (fuel) from a control chamber of the fuel injector in order thereby to control an opening or closing movement of a nozzle needle which releases or closes at least one injection opening formed in the injector housing.
  • the opening or closing characteristic of the magnet armature or the volume exiting from the control chamber during the lifting movement of the magnet armature per unit of time depends i.a. from the maximum armature stroke of the armature.
  • This armature stroke is dependent on a large number of components or their geometric dimensions and tolerances. It is essential that in still cold pressure medium or fuel, especially at relatively high
  • the fuel injector having the features of claim 1 has the advantage that during the entire operating period of the fuel injector, i. Especially during commissioning after starting an internal combustion engine, in which the maximum armature stroke influencing components of the
  • the invention is based on the idea of making it possible, by means of a magnet armature designed or deformed elastically in the direction of movement of the magnet armature, for the magnet armature to achieve different (maximum) armature strokes due to different deformations as a function of the energization of a magnet coil. Due to the different armature strokes can thus compensate for the different temperatures of the armature stroke determining components of the fuel injector insofar as that in an otherwise occurring reduction of the (maximum) Ankerhubs a higher energization of the solenoid is selected, so that the armature to an additional armature stroke in the direction the stroke stop is deflected or moved.
  • the armature at least on the magnetic core facing side is disc-shaped and has at least one weakening area. This weakening area causes the interaction with the stroke stop and
  • this is formed by a slot arranged radially with respect to the longitudinal axis of the magnet armature.
  • at least two, preferably three, slots arranged in mutually equal angular intervals relative to one another are provided as weakened areas.
  • the weakened region is formed by a reduced in height or thickness portion of the magnet armature. Such a reduced section of the magnet armature
  • Magnetic armature may be formed, for example, in the form of a groove or recess radially encircling the longitudinal axis in the magnet armature, so that the for the rigidity of the magnet armature in the disk-shaped area
  • the region of the groove forms a kind of joint, which separates a radially inner region of the magnet armature from a radially outer region, wherein the radially outer region abuts the stroke stop, and the radially inner region is moved further in the direction of the magnetic core.
  • variation of the maximum stroke of the magnet armature can additionally be influenced by the fact that the magnetic core facing the front side of the armature in a radially outer region and in register with the
  • Stroke stop (residual air gap disc) has a raised portion. This raised portion causes an increased distance to the magnetic core is formed in the radially inner region of the magnet armature, which is at least partially reduced at a stronger energization of the magnetic coil, thereby allowing an increased or increased armature stroke.
  • the magnet armature at its
  • Outer circumference viewed in the circumferential direction has at least two sections with different sized diameters, wherein the portion with the larger diameter in coincidence with the stroke stop
  • the stroke stop is designed in particular in the form of a residual air gap disk.
  • a residual air gap disc has the additional advantage that over the thickness of component tolerances of the rest, the armature stroke
  • the invention also includes a method for operating a fuel injector according to the invention so far described, wherein the magnet armature is pressed against a stroke stop during energization by a magnetic coil under elastic deformation.
  • the inventive method is characterized in that the amount of current to the solenoid to
  • Influencing the elastic deformation of the armature and thus its armature stroke is selected time- or temperature-dependent. While a time-dependent energization of the magnet armature can be realized particularly easily and no means for determining the temperature of the pressure medium
  • Energizing the armature has the advantage that the armature stroke can be set very precisely.
  • the amount of current flow starting from a starting value, with increasing operating time of the
  • Fuel injector is reduced to a final value. It is provided that the starting value of the energization depending on the desired
  • (maximum) armature stroke is selected while the final value relates to the condition, in which the components of the fuel injector have assumed the same temperature.
  • Magnetic anchor for the realization of different sized anchor strokes.
  • a fuel injector 100 is shown in fragmentary form, as it serves as a component for injecting fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the internal combustion engine is in particular a self-igniting internal combustion engine, wherein the
  • the fuel injector 100 has a switching valve 10 which is arranged in the region of a recess 12 of the injector housing 11 in the region of a multipart injector housing 11. Within the recess 12, a valve member 15 is also arranged, which with an enlarged diameter, flange-like edge 16 axially on a shoulder 17 of the recess
  • the valve piece 15 has a blind hole-shaped recess 19 in which a nozzle needle 20 serving as an injection member is guided in a lift-movable manner along a longitudinal axis 21.
  • the injection needle 20 or the injection member is used in a conventional manner, the release or closing at least one, formed in the injector 1 1 injection port (not shown) for
  • Control chamber 25 which can be filled via an inlet bore 26 from a high-pressure chamber 27 and pressure relief via a Abiaufbohrung 28 in a low-pressure region of the injector 1 1 and the fuel injector 100.
  • the opening or closing movement of the nozzle needle 20 is controlled in a conventional manner.
  • the drainage bore 28 can be closed or released via a sealing seat 31 formed on an outer surface of the valve piece 15 by means of a magnet armature 35 serving as a valve member 32.
  • magnet armature 35 Serving as part of the switching valve 10 magnet armature 35 has in a sleeve-shaped portion 36 on the sealing seat 31 side facing a conical seat surface 37 which cooperates with lowered magnetic armature 35 with the sealing seat 31.
  • the cross-section substantially hat-shaped armature 35 has a through hole 38, which serves for the radial mounting of the magnet armature 35 by means of an anchor bolt 39 to move the armature 35 in the direction of the longitudinal axis 21.
  • the anchor bolt 39 is radially surrounded by a compression spring 41, which acts with its one end on the top of the armature 35 and axially supported with its other end face on a collar 42 of the anchor bolt 39, so that the armature 35 by means of the compression spring 41 in the direction of
  • Sealing seat 31 of the valve member 15 is subjected to force.
  • this acts together with a likewise serving as part of the switching valve 10 magnetic coil 45, whose energization of a
  • Control device 50 can be influenced.
  • the magnetic coil 45 is received in a radially around the longitudinal axis 21 circumferential recess 51 in a magnetic core 52.
  • the magnetic core 52 is arranged on the side facing away from the valve piece 15 in operative connection with a closure lid 53, wherein further between the magnetic core 52 and the valve piece 15 a
  • Valve member 15 via the magnetic core 52 and the spacer sleeve 54 axially clamped against the shoulder 17 in the recess 12.
  • Magnet armature 35 facing side of the magnetic core 52 a preferably made of non-magnetic material residual air disc 55 arranged as a stationary stroke stop.
  • residual air gap disc 55 is used together with the spacer sleeve 54 for setting the maximum armature stroke of the magnet armature 35 during energization of the magnetic coil 45 and / or the
  • the magnet armature 35 is particularly formed in its magnetic core 52 and the magnetic coil 45 facing disc-shaped region 56, such that the region 56 has an increased deformability or elasticity in the direction of the longitudinal axis 21 to, as explained in more detail below, the maximum Armature stroke of the armature 35 to adjust or influence.
  • FIG. 1 The one shown there
  • Magnetic armature 35 has, in a section of the region 56 lying radially inside the residual air gap disk 55, a groove 60 which extends radially around the longitudinal axis 21 on the side facing the magnetic core 52
  • the magnet armature 35a shown in FIG. 4 has by way of example, and not limitation, in its disk-shaped region 56 three first radial slots 58 arranged at equal angular intervals relative to each other, extending from the outer circumference of the region 56 and close to the through-hole 38 come up.
  • the magnet armature 35a On the outer circumference of the region 56, the magnet armature 35a moreover has three abutment portions 61 arranged at equal angular intervals around the throughbore 38 and projecting radially outwards, each having a relatively small extent in the circumferential direction, which interact with the residual air gap disk 55, so that the Diameter D of the magnet armature 35a is formed larger in the region of the abutment portions 61 than the diameter d in the areas in which no abutment portions 61 are provided.
  • the diameters D, D are exemplified on the
  • Fig. 5 shows an alternative in the perspective longitudinal section
  • the armature 35b in which the abutment portions 62 viewed in the circumferential direction of the region 56 each extend to the respective radial slots 58, 59 extend.
  • the region 56 has a reduced thickness s in the region of the abutment sections 62.
  • the abutment portions 62 extend radially outward further than the wing-like portions (i.e., the portions without abutment portions 62) of the armature 35b in which the thickness s is not reduced. According to FIG. 6, it may optionally be provided to use the armature 35,
  • the step 65 has a wedge-shaped shape in cross section, such that its height is in the radial direction
  • a first operating state in which the magnetic coil 45 is energized by means of the control device 50 with a first current h.
  • This current h causes the magnet armature 35 to move in the direction of
  • Amperage h is selected such that, for example, no (elastic) deformation of the region 56 of the magnet armature 35 takes place.
  • Magnet coil 45 is energized by the controller 50 with a second current, the current b is greater than the current h.
  • the increased current value b causes the portion 56 to be elastically deformed, so that the sleeve-shaped portion 36 whose seating surface 37 facing the seal seat 31 is substantially larger than the armature stroke magnitude i2 is pulled more toward the magnetic core 52 and the solenoid coil 45, respectively , This results a maximum armature stroke i2, which is greater than the armature stroke hi at a reduced energization of the magnetic coil 45th
  • Njektor 100 and the switching valve 10 with the armature 35, 35a, 35b can be modified or modified in many ways, without departing from the spirit. This consists in being able to set different armature strokes hi, i2 by a different high current supply to the magnet coil 45 in conjunction with a partially elastically deformable armature 35, 35a, 35b, in order to adjust the outflow of pressure medium from the control chamber 25 in an operationally dependent manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur de carburant (100), comprenant un organe d'injection (20) pouvant être actionné au moins indirectement par une armature magnétique (35 ; 35a ; 35b). L'armature magnétique (35 ; 35a ; 35b) est agencée à l'intérieur d'un boîtier (11) d'injecteur de manière à pouvoir effectuer un mouvement de va-et-vient le long d'un axe longitudinal (21) et, lorsqu'une bobine magnétique (45) coopérant avec l'armature magnétique (35 ; 35a ; 35b) est alimentée en courant avec une intensité de courant (I1, I2), est mobile à l'encontre de la force d'un élément ressort (41) contre une butée de fin de course (55) fixe, et la butée de fin de course (55) est agencée par rapport à l'axe longitudinal (21) dans une zone radialement extérieure (56) de l'armature magnétique (35 ; 35a ; 35b).
PCT/EP2017/078281 2016-12-21 2017-11-06 Injecteur de carburant et procédé permettant de faire fonctionner un injecteur de carburant Ceased WO2018114110A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016225768.4A DE102016225768A1 (de) 2016-12-21 2016-12-21 Kraftstoffinjektor und Verfahren zum Betreiben eines Kraftstoffinjektors
DE102016225768.4 2016-12-21

Publications (1)

Publication Number Publication Date
WO2018114110A1 true WO2018114110A1 (fr) 2018-06-28

Family

ID=60320861

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/078281 Ceased WO2018114110A1 (fr) 2016-12-21 2017-11-06 Injecteur de carburant et procédé permettant de faire fonctionner un injecteur de carburant

Country Status (2)

Country Link
DE (1) DE102016225768A1 (fr)
WO (1) WO2018114110A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113803197A (zh) * 2021-10-02 2021-12-17 苏州辉美汽车科技有限公司 一种电磁阀及喷油器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110925124B (zh) * 2019-12-11 2021-08-31 长沙理工大学 一种低反跳高速电磁执行器
DE102021133281A1 (de) 2021-12-15 2023-06-15 Liebherr-Components Deggendorf Gmbh Elektromagnetventil, insbesondere zum Schalten eines Kraftstoffinjektors
GB2621537B (en) * 2022-05-23 2024-10-16 Phinia Delphi Luxembourg Sarl Fuel injector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29713167U1 (de) * 1997-07-24 1998-11-19 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Elektromagnetischer Aktuator mit elastisch verformbarem Anker
DE102007016252A1 (de) * 2007-04-04 2008-10-09 Robert Bosch Gmbh Magnetventil
DE102012217322A1 (de) 2012-09-25 2014-06-12 Robert Bosch Gmbh Einspritzventil
DE102013212238A1 (de) 2013-06-26 2014-12-31 Robert Bosch Gmbh Magnetventil und Kraftstoffinjektor mit einem solchen Magnetventil
WO2017108297A1 (fr) * 2015-12-22 2017-06-29 Robert Bosch Gmbh Électrovalve pour une soupape d'injection de carburant, procédé de fonctionnement de l'électrovalve et soupape d'injection de carburant comprenant une telle électrovalve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29713167U1 (de) * 1997-07-24 1998-11-19 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Elektromagnetischer Aktuator mit elastisch verformbarem Anker
DE102007016252A1 (de) * 2007-04-04 2008-10-09 Robert Bosch Gmbh Magnetventil
DE102012217322A1 (de) 2012-09-25 2014-06-12 Robert Bosch Gmbh Einspritzventil
DE102013212238A1 (de) 2013-06-26 2014-12-31 Robert Bosch Gmbh Magnetventil und Kraftstoffinjektor mit einem solchen Magnetventil
WO2017108297A1 (fr) * 2015-12-22 2017-06-29 Robert Bosch Gmbh Électrovalve pour une soupape d'injection de carburant, procédé de fonctionnement de l'électrovalve et soupape d'injection de carburant comprenant une telle électrovalve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113803197A (zh) * 2021-10-02 2021-12-17 苏州辉美汽车科技有限公司 一种电磁阀及喷油器

Also Published As

Publication number Publication date
DE102016225768A1 (de) 2018-06-21

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