WO2014206766A1 - Électrovanne et injecteur de carburant équipé d'une électrovanne - Google Patents

Électrovanne et injecteur de carburant équipé d'une électrovanne Download PDF

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Publication number
WO2014206766A1
WO2014206766A1 PCT/EP2014/062333 EP2014062333W WO2014206766A1 WO 2014206766 A1 WO2014206766 A1 WO 2014206766A1 EP 2014062333 W EP2014062333 W EP 2014062333W WO 2014206766 A1 WO2014206766 A1 WO 2014206766A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
solenoid valve
compression spring
guide element
closing
Prior art date
Application number
PCT/EP2014/062333
Other languages
German (de)
English (en)
Inventor
Michael Lengowski
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 WO2014206766A1 publication Critical patent/WO2014206766A1/fr

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps

Definitions

  • the invention relates to a solenoid valve according to the preamble of claim 1. Furthermore, the invention relates to a fuel injector using a solenoid valve according to the invention.
  • a solenoid valve according to the preamble of claim 1 is known from DE 197 08 104 AI the applicant. It comprises a magnetic actuator, consisting of an armature formed as a flat armature, which cooperates with a magnetic core and a magnetic coil.
  • the armature is on the one hand in the direction of the magnetic core by the spring force of a return spring and on the other hand by means of a compression spring designed as a closing spring in the direction of a sealing seat subjected to a control chamber limits.
  • the magnet coil When the magnet coil is energized, the armature is pulled in the direction of the magnet core in order to allow a discharge of fuel from the control chamber into a low-pressure region of the fuel injector.
  • the invention has the object, a solenoid valve according to the preamble of claim 1 such that waiving a separate radial guidance for the armature this compared to the prior art reduced tendency to tilt caused in particular by manufacturing tolerances of Closing spring having.
  • This object is achieved in a solenoid valve with the features of claim 1, characterized in that the outer circumference of the compression spring (closing spring) is radially at least over a portion of its length from a arranged in the receiving bore guide member.
  • this means that a radial guidance of the compression spring (closing spring) is made possible by the guide element according to the invention, which reduces the radial deflection of the compression spring and thus also the armature when transverse forces occur.
  • the embodiment of the invention has the particular advantage that standardized components with corresponding diameters of the receiving bore can be used, which allow the desired (narrow) radial guidance of the closing spring by the guide element.
  • a corresponding adjustment of the guide element to the respective application case, for example, one and the same magnetic core a relatively simple adaptation to different diameters of the compression spring (closing spring) possible.
  • the guide element is arranged on the armature side facing the receiving bore.
  • the free guide length of the compression spring (closing spring) between the armature facing the end of the compression spring and the armature is reduced, whereby the radial mobility of the armature is limited.
  • the guide element is formed as a guide sleeve and is preferably received axially fixed via a press fit in the receiving bore.
  • the guide element face at least one axial end region on the compression spring Side has an inlet slope for the compression spring.
  • a sufficient function of the guide element at the same time relatively small size is achieved when the axial length of the guide member is not more than 50% of the axial length of the closing spring. Such a length allows, in particular, an exact guidance or positioning of the guide element within the receiving opening of the magnetic core.
  • the armature is designed as a flat armature and on the side facing away from the guide member has a closing member at least indirectly leading, preferably pin-shaped extension, and that the armature is viewed in its longitudinal axis with radial play ,
  • a particularly precise and low-wear guidance of the closing member is achieved when the closing member is designed as a closing ball and is arranged in a guide body, which is accommodated in a receptacle of the extension.
  • the invention also includes a fuel injector using a solenoid valve according to the invention.
  • the fuel injector is designed as a so-called common rail injector.
  • a partial region of a fuel injector 100 is shown, which in particular is designed as a so-called common-rail fuel injector 100. it is.
  • a fuel injector 100 has an injection valve member embodied as a nozzle needle 110, which releases injection openings for the injection of fuel into a combustion chamber of an internal combustion engine when lifted from a sealing seat and closes the injection openings in a lowered position of the nozzle needle 110.
  • the movement of the nozzle needle 110 is regulated via the pressure in a control chamber 101 which can be seen in the figure, in that a control amount of fuel is removed from the control chamber 101 into a low-pressure region of the fuel injector 100 in order to release the injection openings. Since such a fuel injector 100 and its structure and operation from the prior art is known per se and not essential to the invention, reference is made in this regard to DE 197 08 104 AI of the applicant, which should be part of the present application.
  • the fuel injector 100 has a multi-part design
  • the solenoid valve 10 comprises a magnetic actuator 15, which has at least one sleeve core in the exemplary embodiment magnetic core 16 with a recess for a magnetic coil 17 and an armature 18.
  • the armature 18 is formed as a flat armature 19 and has on the control chamber 101 side facing a pin-shaped extension 21 which is either integrally formed on the armature 18, or formed as a separate component and connected to the armature 18, for example, welded ,
  • the end face of the extension 21 has a depression 22 in the form of a blind hole, which serves to receive a receiving element 23.
  • the substantially cylindrical receiving element 23 has, on the side facing the control chamber 101, a spherical segment-shaped recess 24 for a spherical closing member 25.
  • the closing member 25 closes in a lowered position of the armature 18 to form a sealing seat 26, a throttle bore 27 which connects the control chamber 101 with a low pressure region 28 of the fuel injector 100. From the control chamber 101 through the throttle bore 27 escaping fuel is discharged in a conventional manner via the low pressure region 28 of the fuel injector 100 in a fuel return.
  • the armature 18 is on the control chamber 101 side facing in the region of the extension 21 radially by a return spring 30, which is designed as a compression spring comprises.
  • the return spring 30 loads the armature 18 and thus the closing member 25 in its opening direction.
  • a closing spring 32 On the side facing away from the return spring 30 of the armature 18, this is at least indirectly coupled to a closing spring 32, which is also designed as a compression spring 33.
  • the compression spring 33 is arranged at a radial distance from the wall 34 of a cylindrical receiving bore 35, which is formed as a through hole in the magnetic core 16.
  • the receiving bore 35 continues on the side facing away from the control chamber 101 side in a above the magnetic core 16 arranged closure piece 31 continues.
  • the inner circumference of the cylindrical compression spring 33 comprises an additional cylindrical extension 36 of the armature 18 on the side facing the compression spring 33.
  • a guide member 40 for radial guidance of the compression spring 33 is arranged within the receiving bore 35.
  • the guide member 40 is formed in the illustrated embodiment in the form of a hardened material consisting of guide sleeve 41 whose outer diameter is matched to the inner diameter of the receiving bore 35, that an axial fixation or positioning of the guide sleeve 41 in the receiving bore 35 is made possible by a press fit.
  • the guide sleeve 41 and the guide member 40 has a length I, which corresponds to a maximum of about 50% of the length L of the closing spring 32. Furthermore, the guide sleeve 41 on the armature 18 facing side on its inner circumference on an inlet slope 42, the diameter of which extends to the armature 18 out. Preferably, the radial gap 43 formed between the outer periphery of the compression spring 33 and the inner circumference of the guide sleeve 41 is only so great that a relatively small guide clearance between the two mentioned components is made possible. In addition, the guide sleeve 41 at the armature 18 facing end portion of the receiving bore 35th arranged.
  • the compression spring 33 is in the illustrated embodiment with a ground turn end 44 on the compression spring 33 facing end face 45 of the armature 18 at.
  • Solenoid valve 10 can be modified or modified in many ways, without departing from the spirit. This is to guide the closing spring 32 radially by a guide element 40, so that a further radial guidance of the armature 18, in particular on the control chamber 101 side facing, is not required.

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)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une électrovanne (10) servant à commander un élément de soupape d'injection (110) d'un injecteur de carburant. L'élément de soupape d'injection (110) est en liaison active, au moins indirectement, avec une armature (18) d'un actionneur magnétique (15). L'actionneur magnétique (15) comprend en outre au moins un noyau magnétique (16) et une bobine magnétique (17). Sur son côté opposé à l'élément de soupape d'injection (110), l'armature (18) est couplée au moins indirectement à un ressort de fermeture (32), réalisé sous la forme d'un ressort de compression (33), qui précontraint un élément obturateur (25) en direction d'une portée d'étanchéité (26). Le ressort de compression (33) est en appui par une face frontale, de préférence directement, sur l'armature (18) et le ressort de fermeture (32) est disposé coaxialement au noyau magnétique (16) avec un jeu radial par rapport à un perçage réceptacle (35) formé en particulier dans le noyau magnétique (16).
PCT/EP2014/062333 2013-06-25 2014-06-13 Électrovanne et injecteur de carburant équipé d'une électrovanne WO2014206766A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013212137.7 2013-06-25
DE102013212137.7A DE102013212137A1 (de) 2013-06-25 2013-06-25 Magnetventil und Kraftstoffinjektor mit einem Magnetventil

Publications (1)

Publication Number Publication Date
WO2014206766A1 true WO2014206766A1 (fr) 2014-12-31

Family

ID=50982895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/062333 WO2014206766A1 (fr) 2013-06-25 2014-06-13 Électrovanne et injecteur de carburant équipé d'une électrovanne

Country Status (2)

Country Link
DE (1) DE102013212137A1 (fr)
WO (1) WO2014206766A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110242762A (zh) * 2019-07-11 2019-09-17 王红军 一种电控流量阀

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108953742A (zh) * 2018-08-27 2018-12-07 王红军 一种电控流量阀

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678647A5 (en) * 1989-02-27 1991-10-15 Beat Frei High pressure fuel injector with EM jet - with laminated magnetic core receiving central bias spring for valve needle
EP0471212A1 (fr) * 1990-07-31 1992-02-19 WEBER S.r.l. Soupape d'injection électromagnétique de carburant compact pour une amenée de carburant d'un moteur à combustion interne
EP1577539A2 (fr) * 2004-03-18 2005-09-21 Robert Bosch Gmbh Vanne magnétique avec une course d'armature ajustable et méthode pour l'ajuster
DE102008001822A1 (de) * 2008-05-16 2009-11-19 Robert Bosch Gmbh Magnetventil mit Ankerschlitzung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708104A1 (de) 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678647A5 (en) * 1989-02-27 1991-10-15 Beat Frei High pressure fuel injector with EM jet - with laminated magnetic core receiving central bias spring for valve needle
EP0471212A1 (fr) * 1990-07-31 1992-02-19 WEBER S.r.l. Soupape d'injection électromagnétique de carburant compact pour une amenée de carburant d'un moteur à combustion interne
EP1577539A2 (fr) * 2004-03-18 2005-09-21 Robert Bosch Gmbh Vanne magnétique avec une course d'armature ajustable et méthode pour l'ajuster
DE102008001822A1 (de) * 2008-05-16 2009-11-19 Robert Bosch Gmbh Magnetventil mit Ankerschlitzung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110242762A (zh) * 2019-07-11 2019-09-17 王红军 一种电控流量阀

Also Published As

Publication number Publication date
DE102013212137A1 (de) 2015-01-08

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