EP2067981A1 - Ensemble de vanne pour soupape d'injection, et soupape d'injection - Google Patents

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

Info

Publication number
EP2067981A1
EP2067981A1 EP07023778A EP07023778A EP2067981A1 EP 2067981 A1 EP2067981 A1 EP 2067981A1 EP 07023778 A EP07023778 A EP 07023778A EP 07023778 A EP07023778 A EP 07023778A EP 2067981 A1 EP2067981 A1 EP 2067981A1
Authority
EP
European Patent Office
Prior art keywords
fluid
shut
valve assembly
tube
fluid tube
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.)
Granted
Application number
EP07023778A
Other languages
German (de)
English (en)
Other versions
EP2067981B1 (fr
Inventor
Mauro Grandi
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 EP20070023778 priority Critical patent/EP2067981B1/fr
Priority to DE200760012563 priority patent/DE602007012563D1/de
Publication of EP2067981A1 publication Critical patent/EP2067981A1/fr
Application granted granted Critical
Publication of EP2067981B1 publication Critical patent/EP2067981B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • the invention relates to a valve assembly for an injection valve and an injection valve.
  • Injection valves are in widespread use, in particular for an internal combustion engine 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 all the various elements of the injection valve being responsible for the way the fluid is dosed may vary in a wide range.
  • injection valves can accommodate an actuator for actuating a needle of the injection valve, which may, for example, be an electromagnetic actuator or a piezoelectric 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.
  • the object of the invention is to create a valve assembly for an injection valve and an injection valve which is simple to be manufactured and which facilitates a reliable and precise function.
  • the invention is distinguished by a valve assembly of an injection valve, the valve assembly comprising a fluid tube including a central longitudinal axis, the fluid tube having a capped end, a fluid aperture and a fluid tube cavity with a fluid inlet portion and a fluid outlet portion, and a shut-off element axially movable relative to the fluid tube, the shut-off element comprising a sealing portion preventing a fluid flow through the fluid outlet portion and the fluid aperture in a closing position and releasing the fluid flow through the fluid outlet portion and the fluid aperture in further positions, wherein the shut-off element comprises a cavity and the fluid tube is arranged at least partially inside the cavity.
  • shut-off element can be operated in a fluid free environment. Therefore, the influence on the opening and closing behavior of the shut-off element due to fluid properties can be kept small. In particular, the influence of the fluid pressure can be kept small. Furthermore, hydraulic sticking effects between the shut-off element and further parts of the valve assembly can be avoided. Consequently, a good dynamic behavior of the valve assembly can be obtained. Furthermore, the dynamic behavior of the valve assembly due to hydraulic sticking effects can be kept constant during lifetime and a dynamic drift of it can be prevented.
  • the valve assembly comprises a seat body being arranged outside the fluid tube, the sealing portion resting on the seat body in the closing position of the shut-off element.
  • the fluid tube and the seat body form a one-piece element.
  • no further assembling and/or welding operation of the fluid tube and the seat body are necessary. Consequently, an exact alignment of the seat body relative to the fluid tube is possible. Furthermore, a low fluid leakage and a high life-time of the valve assembly is possible.
  • the seat body and the sealing portion are formed as corresponding ring elements. This has the advantage that a large circumferential sealing area is possible. Consequently, good sealing properties are possible.
  • a coupling element is arranged between the sealing portion and an outer surface of the fluid tube and is sealingly coupling the sealing portion with the fluid tube.
  • the coupling element has a bellow consisting of a material comprising a rubber and/or a metal.
  • An injection valve 10 may be used as a fuel injection valve for a combustion chamber of an internal combustion engine and comprises a valve assembly 14, an actuator unit 16 and a fluid connector 18.
  • the actuator unit 16 has a housing 12.
  • the fluid connector 18 is designed to be connected to a high pressure fuel chamber of the internal combustion engine, the fuel is stored for example under the pressure of about 200 bar in the case of a gasoline engine and of about 2000 bar in the case of a diesel engine.
  • the valve assembly 14 comprises a valve body 20 with a central longitudinal axis L.
  • the fluid connector 18 is mechanically and hydraulically coupled to a fluid tube 22.
  • the fluid tube 22 is fixed to the housing 12 on one of its free end.
  • the fluid tube 22 has a tube cavity 24 with a fluid inlet portion 26 and a fluid outlet portion 28.
  • the fluid tube 22 has a capped end 25 facing away from the fluid connector 18.
  • an aperture 30 Adjacent to the fluid outlet portion 28 of the tube cavity 24 of the fluid tube 22 an aperture 30 is arranged which can act as an injection nozzle.
  • the aperture 30 may be, for example, an injection hole, but it may also be of some other type suitable for dosing fluid.
  • the fluid inlet portion 26, the fluid outlet portion 28 and the aperture 30 of the fluid tube 22 are parts of a main fluid line which allows a fluid flow from the fluid inlet portion 26 to the aperture 30.
  • the valve assembly 14 further comprises a shut-off element 32.
  • the shut-off element 32 comprises a sealing portion 34, an armature 36 and a coupling tube 38. Furthermore, the shut-off element 32 has a cavity 33 which is arranged in direction of the central longitudinal axis L.
  • the fluid tube 22 is at least partially arranged inside the cavity 33 of the shut-off element 32.
  • the coupling tube 38 is mechanically coupling the sealing portion 34 with the armature 36.
  • the sealing portion 34, the armature 36 and the coupling tube 38 may be made in one part or may be separate parts.
  • the shut-off element 32 may comprise further parts.
  • the armature 36 is fixedly coupled to the coupling tube 38 at a first end section 38a of the coupling tube 38.
  • the sealing portion 34 is fixedly coupled to the coupling tube 38 at a second end section 38b of the coupling tube 38.
  • the shut-off element 32 further comprises a coupling element 40 which is arranged between the sealing portion 34 and an outer surface 31 of the fluid tube 22.
  • the coupling element 40 is mechanically coupling the sealing portion 34 with the fluid tube 22. By this, a sealing coupling between the two parts is possible and a fluid leakage between the sealing portion 34 and the outer surface 31 of the fluid tube 22 can be avoided.
  • the coupling element 40 preferably comprises a bellow 42 which preferably consists of a material which comprises a rubber and/or a metal.
  • the bellow 42 of the coupling element 40 which is fixedly coupled to the outer surface 31 of the fluid tube 22 and to the sealing portion 34 of the shut-off element 32 enables a sealingly coupling of the sealing portion 34 to the fluid tube 22. By this a fluid flow from the aperture 30 to the actuator unit 16 can be avoided.
  • a spring 44 is arranged in a recess of the housing 12 preferably to rest on a first spring rest 45a of the housing 12 and a second spring rest 45b of the armature 36 of the shut-off element 32. By this, the spring 44 is mechanically coupled to the shut-off element 32.
  • the actuator unit 16 of the injection valve 10 is preferably an electromagnetic drive comprising a coil 46 which is preferably over-molded.
  • the valve body 20, the armature 36 and the coil 46 are forming an electromagnetic circuit.
  • the armature 36 preferably has a large diameter which enables a proper electromagnetic flow through the armature 36 which contributes to a proper controllability of the position of the sealing portion 34 of the shut-off element 32.
  • the coil 46 If the coil 46 is energized this results in an electromagnetic force acting on the shut-off element 32.
  • the electromagnetic force acts against the mechanical force obtained from the spring 44.
  • the shut-off element 32, in particular the sealing portion 34 may in that way be moved away from its closing position which results in a fluid flow through the aperture 30. After a predetermined time the coil 34 may be de-energized again.
  • the valve assembly 14 has a seat body 48 which is arranged outside the fluid tube 22.
  • the fluid tube 22 and the seat body 48 can form a one piece element ( Figure 2 ) or can be separate parts ( Figure 1 ). If the fluid tube 22 and the seat body 48 are separate parts the seat body 48 is fixedly coupled to the fluid tube 22, for example by welding.
  • the seat body 48 and the sealing portion 34 are formed as corresponding ring elements. By this a large circumferential sealing area is possible and therefore, a good sealing behavior of the valve assembly 14 is possible.
  • the fluid may flow from the fluid connector 18 to the fluid inlet portion 26 of the fluid tube 22 to the fluid outlet portion 28. If the shut-off element 22 allows a fluid flow through the fluid outlet portion 28 in an opening position fluid may flow through the aperture 30.
  • the spring 44 forces the sealing portion 34 of the shut-off element 32 towards the seat body 48.
  • the spring 44 can force the shut-off element 32 to move in an axial direction in its closing position. It is depending on the force balance between the force on the shut-off element 32 caused by the coil 46 and the force on the shut-off element 32 caused by the spring 44 whether the shut-off element 32 is in its closing position or not.
  • shut-off element 32 In the case that the coil 46 gets energized a force is effected on the shut-off element 32.
  • the shut-off element 32 is able to move in an axial direction out of the closing position. Outside of the closing position of the shut-off element 32 there is a gap between the sealing portion 34 and the seat body 48 at an axial end of the shut-off element 32 facing away from the fluid connector 18. This enables a fluid flow through the aperture 30.
  • the shut-off element 32 can be operated in a fluid-free environment.
  • the magnetic circuit is formed by the valve body 20, the armature 36 and the coil 46 and as these magnetic components are working under a dry condition without fluid, these components are not influenced by fuel properties. Consequently, sticking forces between the armature 36 and the coil 46 can be eliminated and therefore a drift of the opening and closing behavior of the shut-off element 32 due to fluid properties can be avoided. In particular, the fuel pressure cannot influence the opening and closing time of the shut-off element 32.

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)
EP20070023778 2007-12-07 2007-12-07 Ensemble de vanne pour soupape d'injection, et soupape d'injection Expired - Fee Related EP2067981B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20070023778 EP2067981B1 (fr) 2007-12-07 2007-12-07 Ensemble de vanne pour soupape d'injection, et soupape d'injection
DE200760012563 DE602007012563D1 (de) 2007-12-07 2007-12-07 Ventilanordnung für ein Einspritzventil und Einspritzventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070023778 EP2067981B1 (fr) 2007-12-07 2007-12-07 Ensemble de vanne pour soupape d'injection, et soupape d'injection

Publications (2)

Publication Number Publication Date
EP2067981A1 true EP2067981A1 (fr) 2009-06-10
EP2067981B1 EP2067981B1 (fr) 2011-02-16

Family

ID=39231853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070023778 Expired - Fee Related EP2067981B1 (fr) 2007-12-07 2007-12-07 Ensemble de vanne pour soupape d'injection, et soupape d'injection

Country Status (2)

Country Link
EP (1) EP2067981B1 (fr)
DE (1) DE602007012563D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8833672B2 (en) 2010-08-20 2014-09-16 Rain Bird Corporation Flow control device and method for irrigation sprinklers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1391330A (en) * 1971-06-03 1975-04-23 Maschf Augsburg Nuernberg Ag Fuel injection nozzle for an internal combustion engine
US4151958A (en) 1977-03-09 1979-05-01 Robert Bosch Gmbh Fuel injection nozzle
US5673853A (en) * 1995-09-13 1997-10-07 Cummins Engine Company, Inc. Electromagnetic fuel injector control valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1391330A (en) * 1971-06-03 1975-04-23 Maschf Augsburg Nuernberg Ag Fuel injection nozzle for an internal combustion engine
US4151958A (en) 1977-03-09 1979-05-01 Robert Bosch Gmbh Fuel injection nozzle
US5673853A (en) * 1995-09-13 1997-10-07 Cummins Engine Company, Inc. Electromagnetic fuel injector control valve

Also Published As

Publication number Publication date
EP2067981B1 (fr) 2011-02-16
DE602007012563D1 (de) 2011-03-31

Similar Documents

Publication Publication Date Title
US8931718B2 (en) Valve assembly for an injection valve and injection valve
EP2148082B1 (fr) Arrangement de couplage pour une soupape d'injection et soupape d'injection
US9316191B2 (en) Valve assembly for an injection valve and injection valve
EP2436910A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2602476A1 (fr) Moyen d'ensemble formant soupape pour soupape d'injection et soupape d'injection
US9046066B2 (en) Valve assembly for an injection valve, injection valve and method for assembling a valve assembly of an injection valve
EP2597296B1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2149699B1 (fr) Injecteur à carburant
EP1995447B1 (fr) Ensemble de vanne pour soupape d'injection, et soupape d'injection
EP2378106A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
US10309360B2 (en) Valve assembly for an injection valve and injection valve
EP2067981A1 (fr) Ensemble de vanne pour soupape d'injection, et soupape d'injection
US9574532B2 (en) Valve assembly and injection valve
EP2375051A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
EP1808596A1 (fr) Assemblage de soupape pour un injecteur et l'injecteur
EP2466109A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2003331A1 (fr) Ensemble de vanne pour soupape d'injection, et soupape d'injection
EP1865191A1 (fr) Agencement pour l'ajustement d'une vanne d'injection, vanne d'injection et méthode d'ajustement d'une vanne d'injection
EP1887216A1 (fr) Arrangement thermique de compensation dans une valve d'injection
EP1816344A1 (fr) Assemblage de soupape d'injection et soupape d'injection
EP2080895B1 (fr) Agencement de compensation thermique et soupape d'injection
EP3816431B1 (fr) Injecteur de fluide pour moteur à combustion interne comprenant un élément compensateur de pression
EP2439400A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2426350A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2216542A1 (fr) Ensemble de soupape pour soupape d'injection et soupape d'injection

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17P Request for examination filed

Effective date: 20091210

AKX Designation fees paid

Designated state(s): DE FR IT

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 602007012563

Country of ref document: DE

Date of ref document: 20110331

Kind code of ref document: P

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007012563

Country of ref document: DE

Effective date: 20110331

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20111117

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007012563

Country of ref document: DE

Effective date: 20111117

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20181220

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20181220

Year of fee payment: 12

Ref country code: DE

Payment date: 20181231

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 602007012563

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602007012563

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191231

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191207

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200701