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EP2363595A1 - Ventilanordnung für ein Einspritzventil und Einspritzventil - Google Patents

Ventilanordnung für ein Einspritzventil und Einspritzventil Download PDF

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Publication number
EP2363595A1
EP2363595A1 EP10001954A EP10001954A EP2363595A1 EP 2363595 A1 EP2363595 A1 EP 2363595A1 EP 10001954 A EP10001954 A EP 10001954A EP 10001954 A EP10001954 A EP 10001954A EP 2363595 A1 EP2363595 A1 EP 2363595A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
inlet tube
injection
fluid
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.)
Withdrawn
Application number
EP10001954A
Other languages
English (en)
French (fr)
Inventor
Matteo Soriani
Mauro Grandi
Valerio Polidori
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP10001954A priority Critical patent/EP2363595A1/de
Publication of EP2363595A1 publication Critical patent/EP2363595A1/de
Withdrawn legal-status Critical Current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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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

Definitions

  • Valve assembly for an injection valve and injection valve
  • the invention relates to a valve assembly for an injection valve and to an injection valve.
  • Injection valves are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose the fluid into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • injection valves are manufactured in various forms in order to satisfy the various needs for the various combustion engines. Therefore, for example, their length, their diameter and also various elements of the injection valve being responsible for the way the fluid is dosed may vary in a wide range.
  • injection valves may accommodate an actuator for actuating a needle of the injection valve, which may, for example, be an electromagnetic actuator or a piezo electric actuator.
  • the respective injection valve may be suited to dose fluids under very high pressures.
  • the pressures may be in case of a gasoline engine, for example, in the range of up to 200 bar and in the case of diesel engines in the range of up to 2000 bar.
  • the object of the invention is to create a valve assembly and an injection valve which can be manufactured easily and with low costs.
  • a valve assembly for an injection valve comprising an inlet tube, a valve body including a central longitudinal axis, a valve body shell being arranged radially outside the valve body and the inlet tube and being designed to mechanically couple the valve body to the inlet tube.
  • the inlet tube, the valve body and the valve body shell comprise a common cavity with a fluid inlet portion and a fluid outlet portion.
  • the valve assembly comprises a valve needle axially movable in the cavity. The valve needle prevents a fluid flow through the fluid outlet portion in a closing position and releases the fluid flow through the fluid outlet portion in further positions.
  • the valve assembly further comprises a housing being designed to take up an actuator unit for the actuation of the valve needle.
  • the inlet tube, the valve body shell and the housing are formed as a one-piece part.
  • the one-piece-part of the inlet tube, the valve body shell and the housing can be manufactured by a metal injection molding process or a high density sintering process and the number of machining process steps can be kept small. Consequently, the valve assembly can be processed with low costs. Additionally, the one-piece-part of the inlet tube, the valve body shell and the housing enables an excellent magnetic flux distribution of the electro-magnetic actuator unit.
  • the invention is distinguished by an injection valve with an actuator unit and a valve assembly according to the first aspect of the invention.
  • the actuator unit is coupled to the valve assembly in a manner that the valve assembly is operable by the actuator unit.
  • An injection valve 10 that is in particular suitable for dosing fuel to an internal combustion engine comprises in particular a valve assembly 11.
  • the valve assembly 11 comprises an inlet tube 12. Furthermore, the valve assembly 11 comprises a valve body 14 with a central longitudinal axis L and a valve body shell 16. The valve body shell 16 is arranged radially outside the valve body 14 and the inlet tube 12. The valve body shell 16 is mechanically coupling the valve body 14 to the inlet tube 12.
  • a common cavity 18 is arranged in the inlet tube 12, in the valve body 14 and in the valve body shell 16.
  • the cavity 18 takes in a valve needle 20 and an armature 22.
  • the valve needle 20 is axially movable in the cavity 18.
  • the armature 22 is axially movable in the cavity 18.
  • a calibration spring 24 is arranged in a recess 26 which is provided in the inlet tube 12.
  • the calibration spring 24 is mechanically coupled to the armature 22.
  • the armature 22 forms a seat for the calibration spring 24.
  • the armature 22 has a recess 28.
  • the valve needle 20 is in contact with an inner surface of the armature 22.
  • the inner surface of the armature 22 can guide the valve needle 20 in the recess 28 of the armature 22 in axial direction.
  • a filter element 30 is arranged in the inlet tube 12 and forms a further seat for the calibration spring 24.
  • the injection nozzle 34 may be, for example, an injection hole.
  • the injection valve 10 is provided with an actuator unit 36 that is preferably an electro-magnetic actuator.
  • the electromagnetic actuator unit 36 comprises a coil 38, which is preferably arranged inside a housing 39 and is overmolded. Furthermore, the electro-magnetic actuator unit 36 comprises the armature 22.
  • the inlet tube 12, the valve body shell 16, the housing 39 and the armature 22 are forming an electromagnetic circuit.
  • the cavity 18 has a fluid outlet portion 40 which is arranged near the seat plate 32.
  • the cavity 18 has a fluid inlet portion 42 which is arranged in the inlet tube 12.
  • the fluid outlet portion 40 is in hydraulic communication with the fluid inlet portion 42.
  • a step 44 is arranged in the valve body 14.
  • An armature spring 46 is arranged in the cavity 18 axially between the step 44 of the valve body 14 and the armature 22.
  • the armature spring 46 is a coil spring.
  • the armature spring 46 is supported by the step 44 in the valve body 14.
  • the armature spring 46 forms a support element for the armature 22.
  • the inlet tube 12, the valve body shell 16 and the housing 39 are formed as a one-piece part.
  • the former three individual components inlet tube 12, valve body shell 16 and housing 39 are substituted by a single component.
  • This has the advantage that the number of components of the valve assembly 11 and consequently, the total number of components of the injection valve 10 can be reduced.
  • the number of assembling steps in the manufacturing process can be limited. By this the costs of the injection valve 10 can be kept small.
  • the one-piece component of the inlet tube 12, the valve body shell 16 and the housing 39 can be manufactured by metal injection molding, high density sintering or partially by a machining process. Consequently, as no machining process or only a small amount of a machining process is necessary, the valve assembly can be manufactured with low costs. Furthermore, as the inlet tube 12, the valve body shell 16 and the housing 39 are forming a one-piece part, no laser welding between the single processes, in particular no hermetic welding, is necessary.
  • the one-piece part of the inlet tube 12, the valve body shell 16 and the housing 39 allows a very good magnetic flux distribution in the valve assembly 11 as there are no interfaces between the inner tube 12, the valve body shell 16 and the housing 39.
  • the valve needle 20 prevents a fluid flow through the fluid outlet portion 40 in the valve body 14 in a closing position of the valve needle 20. Outside of the closing position of the valve needle 20, the valve needle 20 enables the fluid flow through the fluid outlet portion 40.
  • the actuator unit 36 may affect an electro-magnetic force on the armature 22.
  • the armature 22 is attracted by the actuator unit 36 with the coil 38 and moves in axial direction away from the fluid outlet portion 40.
  • the armature 22 takes the valve needle 20 with it via the armature spring 46. Consequently, the valve needle 20 moves in axial direction out of the closing position.
  • a fluid path between the valve body 14 and the valve needle 20 at the axial end of the injection valve 10 facing away from of the actuator unit 36 is formed and fluid can pass through the injection nozzle 34.
  • the calibration spring 24 can force the valve needle 20 to move in axial direction in its closing position. It is depending on the force balance between the force on the valve needle 20 caused by the actuator unit 36 with the coil 38 and the force on the valve needle 20 caused by the calibration spring 24 whether the valve needle 20 is in its closing position or not.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP10001954A 2010-02-25 2010-02-25 Ventilanordnung für ein Einspritzventil und Einspritzventil Withdrawn EP2363595A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10001954A EP2363595A1 (de) 2010-02-25 2010-02-25 Ventilanordnung für ein Einspritzventil und Einspritzventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10001954A EP2363595A1 (de) 2010-02-25 2010-02-25 Ventilanordnung für ein Einspritzventil und Einspritzventil

Publications (1)

Publication Number Publication Date
EP2363595A1 true EP2363595A1 (de) 2011-09-07

Family

ID=42634954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10001954A Withdrawn EP2363595A1 (de) 2010-02-25 2010-02-25 Ventilanordnung für ein Einspritzventil und Einspritzventil

Country Status (1)

Country Link
EP (1) EP2363595A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017116383A1 (de) * 2017-07-20 2019-01-24 Liebherr-Components Deggendorf Gmbh Injektor zum Einspritzen von Krafstoff

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008647A1 (de) * 1994-09-13 1996-03-21 Robert Bosch Gmbh Verfahren zur herstellung eines magnetkreises für ein ventil
WO1999000804A1 (de) * 1997-06-27 1999-01-07 Robert Bosch Gmbh Verfahren zur herstellung einer magnetspule für ein ventil und ventil mit einer magnetspule
US20050133631A1 (en) * 2003-12-19 2005-06-23 Hornby Michael J. Polymeric bodied fuel injector with a seat and elastomeric seal molded to a polymeric support member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008647A1 (de) * 1994-09-13 1996-03-21 Robert Bosch Gmbh Verfahren zur herstellung eines magnetkreises für ein ventil
WO1999000804A1 (de) * 1997-06-27 1999-01-07 Robert Bosch Gmbh Verfahren zur herstellung einer magnetspule für ein ventil und ventil mit einer magnetspule
US20050133631A1 (en) * 2003-12-19 2005-06-23 Hornby Michael J. Polymeric bodied fuel injector with a seat and elastomeric seal molded to a polymeric support member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017116383A1 (de) * 2017-07-20 2019-01-24 Liebherr-Components Deggendorf Gmbh Injektor zum Einspritzen von Krafstoff
US11319913B2 (en) 2017-07-20 2022-05-03 Liebherr-Components Deggendorf Gmbh Injector for injecting fuel

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