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EP1816344B1 - Düsenanordnung für eine Einspritzdüse und Einspritzdüse - Google Patents

Düsenanordnung für eine Einspritzdüse und Einspritzdüse Download PDF

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Publication number
EP1816344B1
EP1816344B1 EP20060002243 EP06002243A EP1816344B1 EP 1816344 B1 EP1816344 B1 EP 1816344B1 EP 20060002243 EP20060002243 EP 20060002243 EP 06002243 A EP06002243 A EP 06002243A EP 1816344 B1 EP1816344 B1 EP 1816344B1
Authority
EP
European Patent Office
Prior art keywords
valve
seat body
orifice disc
seat
needle
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.)
Ceased
Application number
EP20060002243
Other languages
English (en)
French (fr)
Other versions
EP1816344A1 (de
Inventor
Paolo Bertini
Alessandro Morelli
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 DE200660007674 priority Critical patent/DE602006007674D1/de
Priority to EP20060002243 priority patent/EP1816344B1/de
Publication of EP1816344A1 publication Critical patent/EP1816344A1/de
Application granted granted Critical
Publication of EP1816344B1 publication Critical patent/EP1816344B1/de
Ceased 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
    • 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
    • F02M61/1853—Orifice plates
    • 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
    • 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

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 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 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 may 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 high pressures.
  • the pressures may be in case of a gasoline engine, for example, in the range of up to 200 bar.
  • US 5,002,231 discloses an injection valve having a movable valve element and a valve seat face located in a nozzle body, a cup-shaped injection port insert is provided downstream of the valve seat face.
  • the bottom of the injection port insert has a dishlike indentation, which is remote from the movable valve element, so that a collecting chamber is formed between the movable valve element and the bottom.
  • the injection valve is particularly suitable for fuel injection systems in internal combustion engines.
  • US 5,881,957 discloses a fuel injector for an internal combustion engine which includes a valve body, a needle valve, and a hollow nozzle body with a bottom having formed therein spray holes.
  • the needle valve is controlled to be selectively brought into and out of engagement with a valve seat in the valve body to close and open a fuel outlet formed in an end surface of the valve body.
  • the hollow nozzle body is welded to the valve body with the bottom urged into constant engagement with the end surface of the valve body at a given level of pressure which is greater than a maximum fuel injection pressure. This makes it possible to establish the constant engagement of the bottom of the hollow nozzle body with the end surface of the valve body without any clearances even when the maximum fuel injection pressure acts on a portion of the bottom of the hollow nozzle body around the spray holes.
  • 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 valve body with a seat body, cavity and an orifice disc being arranged away from the cavity relative to the seat body, and a valve needle axially movable in the cavity.
  • the seat body comprises a needle seat for the valve needle and a projection extending away from the cavity relative to the seat body.
  • the orifice disc comprises a nozzle and a protrusion extending away from the cavity relative to the seat body, and the protrusion abutting the projection of the seat body being rigidly coupled to the projection of the seat body.
  • the orifice disc comprises a plurality of protrusions distributed over the circumference of the orifice disc.
  • the coupling between the protrusion of the orifice disc and the projection of the seat body is laser-welded. This allows a reliable coupling between the seat body and the orifice disc.
  • the orifice disc comprises two protrusions which are arranged on opposing sides of the orifice disc. This enables a simple construction of the orifice disc of the protrusions. Consequently, a low-cost solution for the production of the orifice disc may be obtained.
  • An injection valve 12 that can be used as a fuel injector for an internal combustion engine comprises a valve assembly 10, an actuator unit 11, a fuel connector 13 and a housing 14 ( figure 1 ).
  • the fuel connector 13 is designed to be connected to a (not shown) fuel chamber of the internal combustion engine.
  • the fuel can be stored under a pressure of about 200 bar, for example.
  • the housing 14 is preferably formed in a way that there is a space to lead the fuel from the fuel connector 13 to a fuel inlet of a valve body 20.
  • the actuator unit 11 is preferably arranged in the housing 14.
  • the actuator unit 11 may be of a type known to a person skilled in the art that is suitable for the purpose. It may, for example, contain a piezoelectric actuator. However, the actuator unit 11 may alternatively contain an electromagnetic actuator that comprises an armature 31, a solenoid 32, and a pole element 33.
  • a return spring 25 is arranged and preloaded in such a way that it pushes away the armature 31 from the pole element 33 unless an electromagnetic force created by the solenoid 32 is larger than the preloading force of the return spring 25.
  • the valve body 20 comprises a cartridge 16, which is fixed to the housing 14 at one of its free ends, preferably by welding, especially by laser-welding.
  • the cartridge 16 comprises a cavity 18, which takes in a valve needle 22 and also serves as a fluid duct.
  • the cavity 18 of the cartridge 16 takes in on one of its ends a seat body 27.
  • the seat body 27 comprises in a conically shaped area a needle seat 29 for the inward-opening valve needle 22.
  • the valve needle 22 comprises a seat part 24 with a sealing area 30 that is designed to rest on the needle seat 29, if the seat part 24 is pushed against the needle seat 29.
  • the valve needle 22 is mechanically coupled to the armature 31.
  • the seat body 27 may be made in one part with the cartridge 16 or as a separate part from the cartridge 16. In addition to that a guide disc 35 for guiding the valve needle 22 is provided ( figure 2 ).
  • the seat part 24 of the valve needle 22 may be shaped spherically which improves the sealing quality between the sealing area 30 of the seat part 24 and the needle seat 29.
  • the spherical shape can be easily obtained by forming the seat part 24 out of a ball with a hole where the valve needle 22 is taken in.
  • the ball is preferably fixed to the valve needle 22 by welding.
  • valve needle 22 rests with the sealing area 30 of its seat part 24 in the needle seat 29 of the seat body 27, fluid is prevented from flowing through one nozzle 41 or a plurality of nozzles 41. If the sealing area 30 of the seat part 24 of the valve needle 22 is distanced from the needle seat 29 of the seat body 27 the fluid can flow through the nozzles 41 out of the valve body 20.
  • the nozzles 41 are arranged in an orifice disc 37 which is arranged away from the cavity 18 relative to the seat body 27.
  • the orifice disc 37 is preferably laser-welded to the seat body 27. It may be also fixed in a different manner.
  • the seat body 27 comprises a projection 28 which extends away from the cavity 18 relative to the seat body 27.
  • the orifice disc 37 comprises a protrusion 39 which abuts the projection 28 of the seat body 27 and is coupled to the projection 28 of the seat body 27 by welding, preferably by laser-welding. This allows a reliable coupling between the seat body 27 and the orifice disc 37.
  • Figure 3 shows the valve assembly 10 with the orifice disc 37 comprising a plurality of protrusions 39 which are distributed over the circumference of the orifice disc 37.
  • the protrusions 39 are forming spring elements and allow a very exact positioning of the orifice disc 37 relative to the seat body 27.
  • Preferably each two protrusions 39 are arranged on opposing sides of the orifice disc 37. This enables a simple construction of the orifice disc 37 of the protrusions 39 and, consequently, a low-cost solution is possible.
  • the protrusion 39 is a one-piece element which extends over the whole circumference of the orifice disc 37. This means that the protrusion 39 forms a collar of the orifice disc 37 abutting the projection 38 of the seat body 27.
  • the protrusion 39 works as a spring element and allows a precise fitting of the orifice disc 37 relative to the seat body 27.
  • the fluid is led from the fuel connector 13 to the cavity 18.
  • the spring 25 forces the valve needle 22 towards the actuator unit 11. In the case when the actuator unit 11 is deenergized the spring 25 can force the valve needle 22 to move in axial direction in its closing position.
  • the axial position of the valve needle 22 which determines whether the cavity 18 is opened or closed for a fluid flow is depending on the force balance between the force on the valve needle 12 caused by the actuator unit 11 with the solenoid 32 and the force on the valve needle 22 caused by the spring 25.
  • the actuator unit 11 may effect a force on the valve needle 22.
  • the valve needle 22 is able to move in axial direction out of the closing position. Outside of the closing position of the valve needle 22, there is a gap in an area between the needle seat 29 of the seat body 27 and the sealing area 30 of the valve needle 22. This enables a fluid flow through the nozzles 41 which can be directed very precise due to the exact positioning of the orifice disc 37 with the protrusions 39 relative to the seat body 27.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (4)

  1. Ventilanordnung (10) eines Einspritzventils (12), während die Ventilanordnung (10) umfasst:
    einen Ventilkörper (20) mit einem Sitzkörper (27), einem Hohlraum (18) und einer Öffnungsscheibe (37), die in Bezug auf den Sitzkörper (27) abgewandt von dem Hohlraum (18) angeordnet ist, und
    eine axial in dem Hohlraum (18) bewegbare Ventilnadel (22), während der Sitzkörper (27) einen Nadelsitz (29) für die Ventilnadel (22) sowie einen Vorsprung (28) umfasst, der sich in Bezug auf den Sitzkörper (27) von dem Hohlraum (18) weg erstreckt, dadurch gekennzeichnet, dass die Öffnungsscheibe (37) eine Düse (41) sowie eine Mehrzahl an Vorsprüngen (39) aufweist, die über den Umfang der Öffnungsscheibe (37) verteilt sind, wobei sich die Vorsprünge (39) in Bezug auf den Sitzkörper (27) von dem Hohlraum (18) weg erstrecken und an dem Vorsprung (28) des Sitzkörpers (27) anliegen sowie starr an den Vorsprung (28) des Sitzkörpers (27) gekoppelt sind.
  2. Ventilanordnung (10) gemäß Anspruch 1, in der die Kopplung zwischen den Vorsprüngen (39) der Öffnungsscheibe (37) und dem Vorsprung (28) des Sitzkörpers (27) lasergeschweißt ist.
  3. Ventilanordnung (10) gemäß einem der vorhergehenden Ansprüche, in der die Öffnungsscheibe (37) zwei Vorsprünge (39) aufweist, die an entgegengesetzten Seiten der Öffnungsscheibe (37) angeordnet sind.
  4. Einspritzventil (12) mit einem Gehäuse (14), einer Stellgliedeinheit (11) und einer Ventilanordnung (10) gemäß einem der vorhergehenden Ansprüche.
EP20060002243 2006-02-03 2006-02-03 Düsenanordnung für eine Einspritzdüse und Einspritzdüse Ceased EP1816344B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200660007674 DE602006007674D1 (de) 2006-02-03 2006-02-03 Düsenanordnung für eine Einspritzdüse und Einspritzdüse
EP20060002243 EP1816344B1 (de) 2006-02-03 2006-02-03 Düsenanordnung für eine Einspritzdüse und Einspritzdüse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060002243 EP1816344B1 (de) 2006-02-03 2006-02-03 Düsenanordnung für eine Einspritzdüse und Einspritzdüse

Publications (2)

Publication Number Publication Date
EP1816344A1 EP1816344A1 (de) 2007-08-08
EP1816344B1 true EP1816344B1 (de) 2009-07-08

Family

ID=36607587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060002243 Ceased EP1816344B1 (de) 2006-02-03 2006-02-03 Düsenanordnung für eine Einspritzdüse und Einspritzdüse

Country Status (2)

Country Link
EP (1) EP1816344B1 (de)
DE (1) DE602006007674D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108118A1 (ja) * 2010-03-05 2011-09-09 トヨタ自動車株式会社 燃料噴射弁
JP6654875B2 (ja) * 2015-11-26 2020-02-26 日立オートモティブシステムズ株式会社 燃料噴射弁

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841142C2 (de) * 1988-12-07 1994-09-29 Bosch Gmbh Robert Einspritzventil
JP3687125B2 (ja) * 1995-03-08 2005-08-24 株式会社デンソー 内燃機関用燃料噴射ノズル
JP3750126B2 (ja) * 1996-03-26 2006-03-01 株式会社デンソー 燃料噴射弁
JP3969247B2 (ja) * 2001-11-06 2007-09-05 株式会社デンソー 燃料噴射弁

Also Published As

Publication number Publication date
DE602006007674D1 (de) 2009-08-20
EP1816344A1 (de) 2007-08-08

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