WO2020099093A1 - Soupape pour le dosage d'un fluide - Google Patents

Soupape pour le dosage d'un fluide Download PDF

Info

Publication number
WO2020099093A1
WO2020099093A1 PCT/EP2019/079054 EP2019079054W WO2020099093A1 WO 2020099093 A1 WO2020099093 A1 WO 2020099093A1 EP 2019079054 W EP2019079054 W EP 2019079054W WO 2020099093 A1 WO2020099093 A1 WO 2020099093A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing part
coil carrier
valve
coil
valve according
Prior art date
Application number
PCT/EP2019/079054
Other languages
German (de)
English (en)
Inventor
Ralph Ittlinger
Nico HERRMANN
Philipp Rauschenberger
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
Priority to JP2021526515A priority Critical patent/JP2022507517A/ja
Priority to CN201980075119.6A priority patent/CN113015847A/zh
Priority to KR1020217014306A priority patent/KR20210089667A/ko
Publication of WO2020099093A1 publication Critical patent/WO2020099093A1/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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/077—Injectors having cooling or heating means

Definitions

  • the invention relates to a valve for metering a fluid, in particular a
  • Fuel injection valve for internal combustion engines In particular, the invention relates to the field of injectors for fuel injection systems of motor vehicles, in which fuel is preferably directly injected into combustion chambers of an internal combustion engine.
  • a fuel injection valve for fuel injection systems of internal combustion engines is known from DE 103 60 330 A1.
  • the known fuel injection valve comprises a valve needle, which cooperates with a valve seat surface to form a sealing seat, and an armature connected to the valve needle, which is acted upon by a return spring in a closing direction and which interacts with a solenoid.
  • the magnet coil is encapsulated in a coil housing and wound on a coil carrier, which bears against an inner pole.
  • An electrical plug contact is provided on the magnetic coil, which is surrounded by a plastic sheathing which is molded onto the inner pole.
  • valve according to the invention with the features of claim 1 has the advantage that an improved design and mode of operation are made possible. In particular, an injection behavior can be improved.
  • an electromagnetic actuator is provided with an armature connected to the valve needle, the armature not being fixedly connected to the valve needle, but rather being floatingly supported between two stops which are provided on the valve needle.
  • an axial play between the armature and given the two stops which is called anchor free path.
  • Armature free travel spring the armature can be held at its combustion chamber-side stop in the idle state, so that when an actuator is actuated and the armature is actuated, the complete armature free travel is preferred as
  • the impact forces are divided into two impulses, which results in less seat wear.
  • a lower tendency to bounce in highly dynamic valves can be achieved by decoupling the masses.
  • the valve is preferably used for metering a liquid fluid, in particular a liquid fuel.
  • a gasoline or a is particularly suitable as fuel
  • the term fuel is to be understood generally here, in particular the fuel can also have a certain water content. Embodiments and advantages described on the basis of the fuel also result accordingly in the case of a fluid.
  • the fuel is preferably injected directly into the combustion chamber of an internal combustion engine.
  • the fuel can be supplied via an inlet connection, the fuel first being led through an inlet channel and then entering an anchor chamber. After the fuel has been passed through the armature space, it continues to a sealing seat which is formed between a valve closing body which can be actuated by the valve needle and a valve seat surface.
  • a housing part is provided that can be connected to the inlet connection, for example.
  • the inlet channel can then extend in sections through the inlet connector and in sections through the housing part.
  • the liquid fuel led through the inlet channel then provides one
  • the heat that occurs during operation on the magnetic coil can then be dissipated to this heat sink via the thermally highly conductive coil carrier.
  • the magnetic coil is generally partially surrounded by a plastic, in particular by plastic encapsulation. Because the heat Damage to such a plastic, for example as a result of premature aging, can also be prevented via the coil carrier. In this way, the sealing of the solenoid coil can be guaranteed over the service life, so that in particular no water can penetrate the solenoid coil. This results in advantageous protection against possible corrosion and / or against
  • the magnetic coil can be excited with higher currents in order to achieve higher magnetic forces.
  • a further increase in the magnetic force and thus the opening force acting on the valve needle can be achieved. This enables, in particular, a higher system pressure, in particular a higher fuel pressure.
  • the inner pole can be connected to the inlet connection.
  • the inlet channel can then extend through the inlet connector and the inner pole and lead into the armature space.
  • the valve needle can be guided in the inner pole.
  • Coil carrier and an advantageous thermal transition can be realized.
  • Coil carriers can also be discharged to the fluid via more than one housing part.
  • the heat can optionally also be given off first from one housing part to another housing part and then to the fluid, in particular the fuel.
  • the heat can also be dissipated to the fuel when it is led through the armature space.
  • Advantageous implementations of the coil carrier are specified in claim 10. This makes it possible for the heat loss from the magnetic coil to be effectively given off to the cooler fuel.
  • the magnetic coil can be partially surrounded by a plastic encapsulation. Such a plastic encapsulation has in the Usually a high thermal resistance.
  • coil carriers can dissipate amounts of lost energy and thus damage to the plastic encapsulation can be prevented.
  • the coil wire is wound in a suitable manner on the metallic coil support.
  • the plastic encapsulation can then be implemented, for example, which can be injection molded onto the metallic coil carrier. Then one remains over the metallic coil carrier
  • the coil carrier can be adapted in relation to the respective contact parts, in particular an inner pole and / or a separating ring.
  • Fig. 1 shows a valve in an excerpt, schematic sectional view according to a preferred embodiment of the invention.
  • valve 1 shows a valve 1 for metering a fluid in an excerpt
  • the valve 1 can in particular be designed as a fuel injection valve 1.
  • a preferred application is a fuel injection system, in which such fuel injection valves 1 are designed as high-pressure injection valves 1 and are used for the direct injection of fuel into associated combustion chambers of the internal combustion engine.
  • the configuration of the valve 1 is particularly suitable for liquid fluids, in particular liquid fuels, such as gasoline or diesel, whereby liquid mixtures with at least one fuel and possibly a water content can also be used.
  • the valve 1 has an electromagnetic actuator 2, which comprises a magnet coil 3, an armature 4 and an inner pole 5.
  • a magnetic circuit 6 is closed via the inner pole 5, as a result of which the armature 4 is actuated in an opening direction 7 along a longitudinal axis 8 of a housing (valve housing) 9.
  • the housing 9 in this case comprises a valve seat body 10 and housing parts 11 to 14.
  • the housing part 13 forms the inner pole 5.
  • the armature 4 is arranged on a valve needle 15, in this embodiment a floating mounting of the armature 4 on the valve needle 15 is realized.
  • stops 16, 17 are provided on the valve needle 15 and are arranged in a stationary manner on the valve needle 15.
  • the stops 16, 17 can be configured as components 16, 17 connected to the valve needle 15 and / or in one piece with the valve needle 15. Stop faces 18, 19 facing the armature 4 are formed on the stops 16, 17 and are arranged in a correspondingly fixed manner to the valve needle 15.
  • An anchor free path 20 is specified for the anchor 4.
  • Stop surface 19 strikes.
  • the armature 4 then takes the valve needle 15 with it in the opening direction 7.
  • a larger opening pulse is available to open valve 1.
  • a valve closing body 21 connected to the valve needle 15 lifts up from a valve seat surface 22 formed on the valve seat body 10, so that a valve body between the valve closing body 21 and the
  • Valve seat surface 22 formed sealing seat 23 is opened. Then, fuel can be injected from an interior space 24 of the housing part 11 of the valve housing 9 through nozzle holes 25, 26 formed in the valve seat body 10 into a combustion chamber of an internal combustion engine or the like.
  • the armature 4 When the valve 1 is opened, the armature 4 then strikes a stop surface 27, which in this embodiment is configured on the housing part 13, that is to say the inner pole 5. The stop surface 27 limits the movement of the armature 4 relative to the valve housing 9.
  • the solenoid 3 is de-energized so that the valve needle 15 is again adjusted to the starting position shown in FIG. 1 by a closing spring (return spring) 30 becomes.
  • the armature 4 is carried by the valve needle 15 against the stop 17 against the opening direction 7.
  • the initial position of the armature 4 shown in FIG. 1, in which the armature 4 bears against the stop surface 18, is ensured by an armature free travel spring 31.
  • valve needle 15 can be actuated by the actuator 2 against the force of a return spring 30 in order to open the valve 1.
  • the valve needle 15 is guided here.
  • a valve needle guide 32 is provided on the valve seat body 10. Furthermore, a further guide, for example by means of the stop 17, which is in a bore 33 of the
  • a plurality of flow openings 34 are provided on the valve needle guide 32, the flow opening 34 being identified by way of example in FIG. 1.
  • a plurality of flow openings 35 are provided, with the flow opening 35 being identified by way of example in FIG. 1.
  • the valve 1 has an inlet connection 40 connected to the housing 9.
  • the inlet connector 40 has an axial bore 41.
  • the valve 1 has an inlet channel 42, which is formed in sections by the bore 41 and in sections by the bore 33. A fuel supplied via the inlet connection 40 flows through the
  • Flow arrows 50 to 53 is illustrated, of which flow arrows 50 to 53 are identified by way of example.
  • the fuel is thus guided along the bore 33 of the housing part 13 and the inside 46 of the housing 9.
  • the housing part 12 which is connected to the housing part 11, is designed as a separating ring 60.
  • the inside 46 which delimits the armature space 43, is partially formed on the separating ring 60.
  • a thermal contact 61 which can be implemented, for example, via a contact surface 62 which is preferably in the form of a cylinder jacket.
  • the solenoid 3 is on one
  • the coil carrier 63 wound.
  • the coil carrier 63 is formed at least essentially from one or more metallic materials with high thermal conductivity.
  • the coil carrier 63, the separating ring 60 and the inner pole 5 are configured and arranged with respect to one another such that thermal contacts 64, 65 are formed between the coil carrier 63 and the inner pole 5 or the coil carrier 63 and the separating ring 60.
  • the thermal contacts 64, 65 can be implemented, for example, via contact surfaces 66, 67, which are each preferably in the form of a cylinder jacket. With regard to the longitudinal axis 8, the contact surfaces 62, 66, 67 extend axially and preferably completely circumferentially.
  • the coil carrier 63 is partly placed on the inner pole 5 and partly on the separating ring 60.
  • the coil carrier 63 is partly placed on the inner pole 5 and partly on the separating ring 60.
  • Coil carrier 63 may be pressed onto the inner pole 5 and / or the separating ring 60. This represents a possibility of establishing direct contact between the coil carrier 63 and the inner pole 5 or the separating ring 60. In a modified embodiment, however, a contact means with high thermal conductivity can also be used. A heat loss generated when the solenoid 3 is energized is at least substantially absorbed by the coil carrier 63 and dissipated via the inner pole 5 and the separating ring 60 to the fluid, which serves as a heat sink. The heat transfer to the fluid takes place in the area of the inlet channel 42 and in the area of the armature space 43.

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)
  • Magnetically Actuated Valves (AREA)

Abstract

Soupape (1) pour le dosage d'un fluide, laquelle sert en particulier de soupape d'injection de carburant pour l'injection directe de carburant dans une chambre de combustion d'un moteur à combustion interne, comprenant un pointeau de soupape (15) et un actionneur électromagnétique (2), lequel comprend une bobine magnétique (3) et un induit (4) disposé sur le pointeau de soupape (15), la bobine magnétique (3) étant enroulée sur un porte-bobine (63). Le porte-bobine (63) est formé au moins essentiellement d'au moins un matériau métallique.
PCT/EP2019/079054 2018-11-15 2019-10-24 Soupape pour le dosage d'un fluide WO2020099093A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2021526515A JP2022507517A (ja) 2018-11-15 2019-10-24 流体を計量するための弁
CN201980075119.6A CN113015847A (zh) 2018-11-15 2019-10-24 用于配量流体的阀
KR1020217014306A KR20210089667A (ko) 2018-11-15 2019-10-24 유체 계량용 밸브

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018219527.7 2018-11-15
DE102018219527.7A DE102018219527A1 (de) 2018-11-15 2018-11-15 Ventil zum Zumessen eines Fluids

Publications (1)

Publication Number Publication Date
WO2020099093A1 true WO2020099093A1 (fr) 2020-05-22

Family

ID=68382443

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/079054 WO2020099093A1 (fr) 2018-11-15 2019-10-24 Soupape pour le dosage d'un fluide

Country Status (5)

Country Link
JP (1) JP2022507517A (fr)
KR (1) KR20210089667A (fr)
CN (1) CN113015847A (fr)
DE (1) DE102018219527A1 (fr)
WO (1) WO2020099093A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861644A (en) * 1973-10-09 1975-01-21 Gen Motors Corp Solenoid valve
DE19727414A1 (de) * 1997-06-27 1999-01-07 Bosch Gmbh Robert Verfahren zur Herstellung einer Magnetspule für ein Ventil und Ventil mit einer Magnetspule
DE10360330A1 (de) 2003-12-20 2005-07-21 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006042600A1 (de) * 2006-09-11 2008-03-27 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung eines elektromagnetisch betätigbaren Ventils
DE102012213699A1 (de) * 2012-08-02 2014-02-06 Robert Bosch Gmbh Magnetventil zum Zumessen von Fluid

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3664896B2 (ja) * 1998-11-12 2005-06-29 愛三工業株式会社 電磁式燃料噴射弁
JP2001280213A (ja) * 2000-03-31 2001-10-10 Aisan Ind Co Ltd 小型化されたインジェクタ
DE102013224863A1 (de) * 2013-12-04 2015-06-11 Robert Bosch Gmbh Magnetaktor für einen Kraftstoffinjektor sowie Kraftstoffinjektor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861644A (en) * 1973-10-09 1975-01-21 Gen Motors Corp Solenoid valve
DE19727414A1 (de) * 1997-06-27 1999-01-07 Bosch Gmbh Robert Verfahren zur Herstellung einer Magnetspule für ein Ventil und Ventil mit einer Magnetspule
DE10360330A1 (de) 2003-12-20 2005-07-21 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006042600A1 (de) * 2006-09-11 2008-03-27 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung eines elektromagnetisch betätigbaren Ventils
DE102012213699A1 (de) * 2012-08-02 2014-02-06 Robert Bosch Gmbh Magnetventil zum Zumessen von Fluid

Also Published As

Publication number Publication date
CN113015847A (zh) 2021-06-22
JP2022507517A (ja) 2022-01-18
DE102018219527A1 (de) 2020-05-20
KR20210089667A (ko) 2021-07-16

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