EP2067981B1 - 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

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Publication number
EP2067981B1
EP2067981B1 EP20070023778 EP07023778A EP2067981B1 EP 2067981 B1 EP2067981 B1 EP 2067981B1 EP 20070023778 EP20070023778 EP 20070023778 EP 07023778 A EP07023778 A EP 07023778A EP 2067981 B1 EP2067981 B1 EP 2067981B1
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.)
Expired - Fee Related
Application number
EP20070023778
Other languages
German (de)
English (en)
Other versions
EP2067981A1 (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

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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
    • 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.
  • US 4,151,958 discloses a fuel injection nozzle including in assembly the following essential components: a nozzle body; a needle valve and a control member. Two stages of injection are produced both of which are controlled by the needle valve.
  • the control member serves during the second stage of injection and cooperates with the needle valve to effect this stage of injection.
  • the control member fits, in a radially sealed manner, within a blind bore formed in the needle valve and defines a channel through which fuel flows under the control of the needle valve. The channel in turn is connected with injection openings for the injection of fuel during the second stage of injection.
  • 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.
  • 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 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.
  • 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.
  • 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 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.

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  • 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)

Claims (6)

  1. Ensemble de soupape (14) d'une soupape d'injection (10), l'ensemble de soupape (14) comprenant :
    un tube de fluide (22) comprenant un axe longitudinal central (L), le tube de fluide (22) ayant une extrémité encapsulée (25), une ouverture de fluide (30) et une cavité de tube de fluide (24) avec une partie d'entrée de fluide (26) et une partie de sortie de fluide (28), et
    un élément de coupage (32) se déplaçant axialement par rapport au tube de fluide (22), l'élément de coupage (32) comprenant une partie d' étanchéité (34) empêchant un écoulement de fluide à travers la partie de sortie de fluide (28) et l'ouverture de fluide (30) dans une position de fermeture et libérant l'écoulement de fluide à travers la partie de sortie de fluide (28) et l'ouverture de fluide (30) dans des positions supplémentaires, dans lequel l'élément de coupage (32) comprend une cavité (33) et le tube de fluide (22) est agencé au moins partiellement à l'intérieur de la cavité (33), caractérisé en ce qui :
    un élément de couplage (40) est agencé entre la partie d'étanchéité (34) et une surface externe (31) du tube de fluide (22) et couple de manière étanche la partie d'étanchéité (34) avec le tube de fluide (22).
  2. Ensemble de soupape (14) selon la revendication 1, avec l'ensemble de soupape (14) qui comprend un corps de siège (48) qui est agencé à l'extérieur du tube de fluide (22), la partie d'étanchéité (34) reposant sur le corps de siège (48) dans la position de fermeture de l'élément de coupage (32).
  3. Ensemble de soupape (14) selon la revendication 2, avec le tube de fluide (22) et le corps de siège (48) qui forment un élément d'une seule pièce.
  4. Ensemble de soupape (14) selon l'une quelconque des revendications 2 et 3, avec le corps de siège (48) et la partie d'étanchéité (34) qui sont formés comme des éléments annulaires correspondants.
  5. Ensemble de soupape (14) selon l'une quelconque des revendications précédentes, avec l'élément de couplage (40) qui a un soufflet (42) constitué d'un matériau comprenant un caoutchouc et/ou un métal.
  6. Soupape d'injection (10) avec un boîtier (12), un ensemble de soupape (14) et une unité d'actionneur (16) selon l'une quelconque des revendications précédentes.
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 EP2067981A1 (fr) 2009-06-10
EP2067981B1 true 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)

Cited By (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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127460C3 (de) * 1971-06-03 1973-11-22 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Rotationssymmetrisch gebaute Brennstoffeinspritzdüse
DE2710216A1 (de) 1977-03-09 1978-09-14 Bosch Gmbh Robert Kraftstoffeinspritzduese
US5673853A (en) * 1995-09-13 1997-10-07 Cummins Engine Company, Inc. Electromagnetic fuel injector control valve

Cited By (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

Also Published As

Publication number Publication date
EP2067981A1 (fr) 2009-06-10
DE602007012563D1 (de) 2011-03-31

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