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EP2375051A1 - Ensemble de soupape pour soupape d'injection et soupape d'injection - Google Patents

Ensemble de soupape pour soupape d'injection et soupape d'injection Download PDF

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Publication number
EP2375051A1
EP2375051A1 EP10003831A EP10003831A EP2375051A1 EP 2375051 A1 EP2375051 A1 EP 2375051A1 EP 10003831 A EP10003831 A EP 10003831A EP 10003831 A EP10003831 A EP 10003831A EP 2375051 A1 EP2375051 A1 EP 2375051A1
Authority
EP
European Patent Office
Prior art keywords
valve
armature
fluid
assembly
outlet portion
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Withdrawn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
EP10003831A
Other languages
German (de)
English (en)
Inventor
Antonio Agresta
Marco Mechi
Luigi Gargiulo
Salvatore Varchetta
Nicola Iannaccone
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 EP10003831A priority Critical patent/EP2375051A1/fr
Publication of EP2375051A1 publication Critical patent/EP2375051A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • the invention relates to a valve assembly for an injection valve and 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 which facilitates a reliable and precise function.
  • a valve assembly for an injection valve comprising a valve body including a central longitudinal axis.
  • the valve body comprises a 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 comprises an electro-magnetic actuator unit being designed to actuate the valve needle.
  • the electro-magnetic actuator unit comprises an armature assembly axially movable in the cavity.
  • the armature assembly has a first axial end facing the fluid inlet portion and a second axial end facing the fluid outlet portion.
  • the armature assembly comprises at least one aperture extending from the first axial end of the armature assembly to the second axial end to enable a hydraulic coupling between the fluid inlet portion and the fluid outlet portion.
  • the armature assembly comprises an armature and a retainer.
  • the retainer is separate from the armature. This has the advantage that the valve assembly can be assembled in a simple manner.
  • a through hole is arranged in the armature and the through hole is part of the aperture.
  • the retainer comprises a flat forming a recess in the retainer, and the recess is part of the aperture.
  • the at least one through hole and the at least one recess are dimensioned in a manner that a given minimum fluid flow through an auxiliary fluid line through the recesses of the retainer and the through holes of the armature is enabled.
  • the invention is distinguished by an injection valve with a valve assembly according to the first aspect of the invention.
  • 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 a valve body 12 with a central longitudinal axis L.
  • the valve body 12 comprises an inlet tube 14.
  • a housing 16 is partially arranged around the valve body 12.
  • a cavity 18 is arranged in the valve body 12.
  • the cavity 18 takes in a valve needle 20 and an armature assembly.
  • the valve needle 20 is hollow and has a recess 21 which is arranged in direction of the central longitudinal axis L over a portion of the axial length of the valve needle 20 or over the whole axial length of the valve needle 20.
  • the cavity 18 of the valve body 12, the recess 21 of the valve needle 20 and channels between the cavity 18 of the valve body 12 and the recess 21 of the valve needle 20 are parts of a main fluid line F_M.
  • the armature assembly comprises an armature 22 and a retainer 23.
  • the armature 22 is separate from the retainer 23.
  • the armature 22 is axially movable in the cavity 18.
  • the armature 22 is separate from the valve needle 20 and is axially movable relative to the valve needle 20.
  • the retainer 23 is formed as a collar around the valve needle 20.
  • the retainer 23 is in contact with an inner surface of the inlet tube 14 and can guide the valve needle 20 in axial direction inside the inlet tube 14.
  • the retainer 23 has at least one flat 25.
  • the retainer 23 has a plurality of flats 25 (see Figure 3 ).
  • a recess 26 is provided in the inlet tube 14.
  • a main spring 28 is arranged in the recess 26 of the inlet tube 14.
  • the main spring 28 is mechanically coupled to the retainer 23.
  • the retainer 23 forms a first seat for the main spring 28.
  • a filter element 30 is arranged in the inlet tube 14 and forms a further seat for the main spring 28.
  • the filter element 30 can be moved axially in the inlet tube 14 in order to preload the main spring 28 in a desired manner.
  • the main spring 28 exerts a force on the valve needle 20 towards an injection nozzle 34 of the injection valve 10.
  • the injection nozzle 34 may be, for example, an injection hole. However, it may also be of some other type suitable for dosing fluid.
  • the valve assembly 11 is provided with an actuator unit 36 that is preferably an electro-magnetic actuator.
  • the electro-magnetic actuator unit 36 comprises a coil 38, which is preferably arranged inside the housing 16 and overmolded. Furthermore, the electro-magnetic actuator unit 36 comprises the armature 22.
  • the housing 16, the inlet tube 14, parts of the valve body 12 and the armature 22 are forming an electromagnetic circuit.
  • the cavity 18 comprises a fluid outlet portion 40 which is arranged near the seat plate 32.
  • the fluid outlet portion 40 communicates with a fluid inlet portion 42 which is provided in the valve body 12, in particular in the inlet tube 14.
  • a step 44 is arranged in the valve body 12.
  • An armature spring 46 which is preferably a coil spring is fixedly coupled to the step 44 in the valve body 12.
  • the step 44 and the armature spring 46 form a stop element for the armature 22.
  • the armature assembly has a first axial end 24a which faces the fluid inlet portion 42. Furthermore, the armature assembly has a second axial end 24b which faces the fluid outlet portion 40. At least one aperture 48 is arranged in the armature assembly. Preferably, the armature assembly has a plurality of apertures 48. The apertures 48 extend from the first axial end 24a to the second axial end 24b of the armature assembly. The apertures 48 are hydraulically coupling the fluid inlet portion 42 with the fluid outlet portion 40. Each of the apertures 48 consists of at least one through hole 50 and at least one recess 52. The through holes 50 are arranged in the armature 22. The recesses 52 are formed by the flats 25 and are arranged in the retainer 23 ( Figure 3 ).
  • the fluid is led from the fluid inlet portion 42 towards the fluid outlet portion 40.
  • the valve needle 20 prevents a fluid flow through the fluid outlet portion 40 in the valve body 12 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 effect a electro-magnetic force on the armature 22.
  • the armature 22 is attracted by the electro-magnetic 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 so that the valve needle 20 moves in axial direction out of the closing position. Outside of the closing position of the valve needle 20 the gap between the valve body 12 and the valve needle 20 at the axial end of the injection valve 10 facing away from of the actuator unit 36 forms a fluid path and fluid can pass through the injection nozzle 34.
  • the main spring 28 can force the retainer 23 and the valve needle 20 to move in axial direction until the closing position of the valve needle 20 is reached. 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 main spring 28 whether the valve needle 20 is in its closing position or not.
  • the armature 22 can move relative to the valve needle 20 and the retainer 23 in axial direction and can detach from the retainer 23. The movement of the armature 22 is dampened by the armature spring 46 which finally forces the armature 22 to come again into contact with the retainer 23.
  • fluid can flow via the main fluid line F_M from the fluid inlet portion 42 to the recess 21 of the valve needle 20, further through the channels between the recess 21 of the valve needle 20 and the cavity 18 of the valve body 12 to the fluid outlet portion 40. Furthermore, fluid can flow from the fluid inlet portion 42 via an auxiliary fluid line F_A through the recesses 52 of the retainer 23 and the through holes 50 of the armature 22 to the fluid outlet portion 40 ( Figure 2 ).
  • the apertures 48 with the recesses 52 of the retainer 23 and the through holes 50 can balance the pressure between the fluid inlet portion 42 and the fluid outlet portion 40. Therefore, the pressure fluctuations in the fluid outlet portion 40 may be kept small. Therefore, mass flow fluctuations of the fluid which depend on the pressure fluctuations may be small as well. Consequently, the fluid spray leaving the fluid outlet portion 40 via the injection nozzle 34 may have a high stability. Due to this, the number of scrapped injection valves 10 on the assembly line may be kept small. Furthermore, a long-term uniformity of the injected fluid mass and of the spray may be achieved during the operation of the injection valve 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP10003831A 2010-04-09 2010-04-09 Ensemble de soupape pour soupape d'injection et soupape d'injection Withdrawn EP2375051A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10003831A EP2375051A1 (fr) 2010-04-09 2010-04-09 Ensemble de soupape pour soupape d'injection et soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10003831A EP2375051A1 (fr) 2010-04-09 2010-04-09 Ensemble de soupape pour soupape d'injection et soupape d'injection

Publications (1)

Publication Number Publication Date
EP2375051A1 true EP2375051A1 (fr) 2011-10-12

Family

ID=42340457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10003831A Withdrawn EP2375051A1 (fr) 2010-04-09 2010-04-09 Ensemble de soupape pour soupape d'injection et soupape d'injection

Country Status (1)

Country Link
EP (1) EP2375051A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2837813A1 (fr) * 2013-08-14 2015-02-18 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
EP3009658A1 (fr) * 2014-10-15 2016-04-20 Continental Automotive GmbH Injecteur pour injection de fluides
US11242831B2 (en) * 2017-09-29 2022-02-08 Denso Corporation Fuel injection valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905371A2 (fr) * 1997-09-24 1999-03-31 MAGNETI MARELLI S.p.A. Injecteur électromagnétique
WO2001006113A1 (fr) * 1999-07-14 2001-01-25 Robert Bosch Gmbh Soupape d'injection de carburant
US20040011899A1 (en) * 2001-06-22 2004-01-22 Gunter Dantes Fuel injection valve
US20080264389A1 (en) * 2005-06-16 2008-10-30 James Paul Fochtman Component geometry and method for blowout resistant welds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905371A2 (fr) * 1997-09-24 1999-03-31 MAGNETI MARELLI S.p.A. Injecteur électromagnétique
WO2001006113A1 (fr) * 1999-07-14 2001-01-25 Robert Bosch Gmbh Soupape d'injection de carburant
US20040011899A1 (en) * 2001-06-22 2004-01-22 Gunter Dantes Fuel injection valve
US20080264389A1 (en) * 2005-06-16 2008-10-30 James Paul Fochtman Component geometry and method for blowout resistant welds

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2837813A1 (fr) * 2013-08-14 2015-02-18 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
CN104373267A (zh) * 2013-08-14 2015-02-25 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
US9494117B2 (en) 2013-08-14 2016-11-15 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
CN104373267B (zh) * 2013-08-14 2018-03-27 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
EP3009658A1 (fr) * 2014-10-15 2016-04-20 Continental Automotive GmbH Injecteur pour injection de fluides
WO2016058772A1 (fr) * 2014-10-15 2016-04-21 Continental Automotive Gmbh Injecteur pour l'injection de fluide
KR20170054506A (ko) * 2014-10-15 2017-05-17 콘티넨탈 오토모티브 게엠베하 유체 분사용 인젝터
US20170218901A1 (en) * 2014-10-15 2017-08-03 Continental Automotive Gmbh Injector for Injecting Fluid
KR101949061B1 (ko) 2014-10-15 2019-02-15 콘티넨탈 오토모티브 게엠베하 유체 분사용 인젝터
US10330062B2 (en) * 2014-10-15 2019-06-25 Cpt Zwei Gmbh Injector for injecting fluid
US11242831B2 (en) * 2017-09-29 2022-02-08 Denso Corporation Fuel injection valve

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