EP1845254A1 - Ventilanordnung - Google Patents

Ventilanordnung Download PDF

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Publication number
EP1845254A1
EP1845254A1 EP06007615A EP06007615A EP1845254A1 EP 1845254 A1 EP1845254 A1 EP 1845254A1 EP 06007615 A EP06007615 A EP 06007615A EP 06007615 A EP06007615 A EP 06007615A EP 1845254 A1 EP1845254 A1 EP 1845254A1
Authority
EP
European Patent Office
Prior art keywords
armature
valve needle
valve
valve assembly
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.)
Withdrawn
Application number
EP06007615A
Other languages
English (en)
French (fr)
Inventor
Fabio Fornaciari
Matteo Soriani
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP06007615A priority Critical patent/EP1845254A1/de
Publication of EP1845254A1 publication Critical patent/EP1845254A1/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Withdrawn legal-status Critical Current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
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M61/166—Selection of particular materials

Definitions

  • the invention relates to a valve assembly, in particular for an injection valve for dosing fluid into a combustion chamber of an internal combustion engine.
  • Injection valves are in widespread use, in particular for internal combustion engines, where they may be arranged next to the combustion chamber to dose fluid into the combustion chamber or into the intake manifold. Due to increased requirements in respect to performance and also in respect to the limitation of emissions emitted by a vehicle, in which the injection valve may be arranged, injection valves should be operable to dose also very small amounts of fluid precisely. In addition to that, the injectors should be designed such that their energy consumption is as low as possible.
  • the object of the invention is to create a valve assembly which enables a fast and reliable response time and is simple to manufacture.
  • the invention is distinguished by a valve assembly comprising a electro-magnetic circuit operable to actuate a valve needle.
  • the electro-magnetic circuit comprises a fluid inlet tube and an armature being arranged axially in proximity to the fluid inlet tube.
  • the armature is movably arranged on the valve needle. Its axial movement is limited in one direction by a protrusion associated to the valve needle.
  • An armature spring is fixed to the valve needle and rests on the armature. The armature spring exerts a force on the armature pushing the armature towards the protrusion.
  • the armature which has a relatively high inertia compared to the valve needle itself, can dissipate its kinetic energy by making relative movements relative to the valve needle in the closing position of the needle being controlled by the force exerted from the armature spring.
  • the spring constant of the armature spring 30 is chosen by way of experiments appropriately in order to ensure the right elastic properties and to ensure an optimum between softness and hardness of the armature spring.
  • the armature is made by a sintering process. This is especially cost-effective and is possible due to the possible clearance between the valve needle and the armature.
  • the armature spring has a trumpet-type shape. This has proven to be especially suitable for dampening the bouncing of the needle and in that way dampening the oscillating movement of the armature when reaching the closing position of the valve needle.
  • the valve needle is formed in a tubular shape.
  • the mass of the needle may be reduced resulting in a lower inertia of the valve needle.
  • the valve needle is manufactured by a rotary swaging process.
  • a ball is fixed to the valve needle at an axial end of the valve needle facing away from the armature. This permits to choose the material of the ball appropriately in order to ensure a proper sealing of an injection nozzle and on the other hand to minimize wear.
  • the valve needle itself may be chosen to comprise a material best suitable for the valve needle part itself.
  • An injection valve (FIG. 1) comprises a housing, which may be manufactured by an overmolding process, a fluid connector and a connector for the electrical connection of the injection valve and the valve assembly.
  • the fluid connector, the housing and the electrical connector are not shown in FIG. 1.
  • the valve assembly comprises a fluid inlet tube 1 with an inlet recess 2.
  • a filter 3 is arranged in the inlet recess 2 and filters during operation of the injection valve the fluid flowing through the injection valve.
  • the injection valve is during operation connected to a fluid supply via the fluid connector.
  • the injection valve may be arranged in an internal combustion engine in order to dose fuel into an intake manifold or a combustion chamber.
  • the filter 3 may also serve the purpose of pretensioning a spring 4, which is also arranged in the valve assembly.
  • the valve assembly comprises an electro-magnetic circuit.
  • the electro-magnetic circuit comprises a coil 6, a magnetic housing 8, a valve body shell 10 and an armature 12.
  • a non-magnetic shell 14 preferably in an L-shape, is also arranged between the coil 6 and the fluid inlet tube 1 and the armature 12.
  • the fluid inlet tube 1 also forms part of the electro-magnetic circuit.
  • the non-magnetic shell 14 is arranged and formed such that the magnetic flux is directed from the fluid inlet tube 1 to the armature 12 to a high percentage and in that way improving the efficiency of the magnetic circuit.
  • the armature 12 is arranged with one of its axial ends in proximity to an opposing axial end of the fluid inlet tube 1.
  • the valve assembly further comprises a valve body 16 having a recess 20 taking in a valve needle 18.
  • the valve needle 18 prevents a fluid flow through an injection nozzle 22 in a closing position and enables a fluid flow through the injection nozzle 22 apart from the closing position.
  • the position of the valve needle 18 depends on the forces exerted on the valve needle 18.
  • the valve needle 18 comprises a protrusion 28 which serves as a spring rest for the spring 4. The forces acting on the valve needle 18 and in that way determining its position are the force exerted by the spring 4, the weight of the valve needle 18, the pressure of the fluid and an electromagnetic force exerted by the electro-magnetic circuit via the armature on the needle 18.
  • the valve needle 18 is preferably formed in a tubular shape. In this way, the mass of the valve needle 18 may be kept very low.
  • the valve needle 18 is manufactured by a rotary swaging process.
  • a ball 26 is preferably fixed to the valve needle 18 at its axial end facing towards the injection nozzle 22.
  • the ball 26 may comprise a material that is suitable for ensuring a good sealing, when the valve needle 18 rests in its closing position and on the other hand ensures that wear during the lifetime of the injector is minimized.
  • the armature 12 is arranged on the valve needle 18 with a clearance in order to enable a slight axial relative movement to the valve needle 18. The axial movement of the armature 12 is limited in the direction facing away from the ball 26 by the protrusion 28.
  • An armature spring 30 is provided, which is fixed to the valve needle 18. It is preferably fixed to the valve needle 18 by welding or brazing.
  • the armature spring 30 is arranged such that it exerts a force on the armature 12 pushing it towards the protrusion 28.
  • the spring constant of the armature spring 30 is chosen appropriately in order to enable a slight movement of the armature 12 relatively to the valve needle 18 when the armature needs to dissipate its kinetic energy when the valve needle 18 reaches its closing position.
  • the armature is preferably manufactured by a sintering process and may be additionally grinded.
  • the valve needle 18 further comprises a fluid outlet 24. In that way, the fluid may flow through the filter 3 and in the area of the spring 4 into the valve needle 18 and exit the valve needle 18 at the fluid outlet 24 and then flow towards the injection nozzle 22.
  • the valve needle is preferably made out of an austenitic stainless steel, which permits to ensure a high chemical resistance against aggressive fluids, like fuel, and ensures a low inertial force due to the low weight.
  • the ball shaped tip is preferably manufactured from a martensitic stainless steel, which permits to maintain the mechanical characteristics during the lifetime of the injector.
  • valve needle 18 When the valve needle 18 is moved out of a position apart from the closing position, which may be an opening position, towards its closing position, for example when significantly reducing the magnetic flux in the electro-magnetic circuit, the valve needle 18 reaches the closing position and is then decelerated significantly when the ball 26 rests in its seat closing the injection nozzle 22.
  • the kinetic energy of the armature 12 may then be dissipated by an oscillation of the armature 12 relative to the valve needle 18 enabled by the clearance between the valve needle 18 and the armature 12 and the possible axial movement being dampened by the armature spring 30. This has the effect that a bouncing of the valve needle 18 is minimized, which leads to a very precise closing time of the injection nozzle 22 and therefore enables a very precise dosing of fluid, in particular for small amounts of fluid.
  • the armature spring 30 preferably has a trumpet-type shape.

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)
EP06007615A 2006-04-11 2006-04-11 Ventilanordnung Withdrawn EP1845254A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06007615A EP1845254A1 (de) 2006-04-11 2006-04-11 Ventilanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06007615A EP1845254A1 (de) 2006-04-11 2006-04-11 Ventilanordnung

Publications (1)

Publication Number Publication Date
EP1845254A1 true EP1845254A1 (de) 2007-10-17

Family

ID=36921435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06007615A Withdrawn EP1845254A1 (de) 2006-04-11 2006-04-11 Ventilanordnung

Country Status (1)

Country Link
EP (1) EP1845254A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2241743A1 (de) * 2009-04-14 2010-10-20 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
EP2436908A1 (de) * 2010-09-30 2012-04-04 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
CN102652219A (zh) * 2009-12-11 2012-08-29 欧陆汽车有限责任公司 用于喷射阀的阀组件和喷射阀
EP2706221A1 (de) * 2012-09-07 2014-03-12 Continental Automotive GmbH Ventilanordnung für eine Brennstoffeinspritzdüse und Brennstoffeinspritzdüse
EP2896812A1 (de) * 2014-01-16 2015-07-22 Continental Automotive GmbH Kraftstoffeinspritzdüse
US9341154B2 (en) 2014-04-10 2016-05-17 Continental Automotive Gmbh Valve assembly for a fuel injector and fuel injector
CN108533433A (zh) * 2018-01-24 2018-09-14 中国第汽车股份有限公司 一种燃料喷射阀
EP3425191A1 (de) * 2017-07-05 2019-01-09 Delphi Technologies IP Limited Antirotationsvorrichtung einer nadel einer injektionsdüse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5566920A (en) * 1992-09-11 1996-10-22 Robert Bosch Gmbh Valve needle for an electromagnetically actuable valve and method for manufacturing the valve needle
US6520434B1 (en) * 1999-06-18 2003-02-18 Robert Bosch Gmbh Fuel injection valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5566920A (en) * 1992-09-11 1996-10-22 Robert Bosch Gmbh Valve needle for an electromagnetically actuable valve and method for manufacturing the valve needle
US6520434B1 (en) * 1999-06-18 2003-02-18 Robert Bosch Gmbh Fuel injection valve

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2241743A1 (de) * 2009-04-14 2010-10-20 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
CN102652219B (zh) * 2009-12-11 2015-09-23 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
US9316191B2 (en) 2009-12-11 2016-04-19 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
CN102652219A (zh) * 2009-12-11 2012-08-29 欧陆汽车有限责任公司 用于喷射阀的阀组件和喷射阀
US9376994B2 (en) 2010-09-30 2016-06-28 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
CN103119282B (zh) * 2010-09-30 2015-04-22 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
CN103119282A (zh) * 2010-09-30 2013-05-22 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
WO2012041984A1 (en) 2010-09-30 2012-04-05 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
KR20130114666A (ko) * 2010-09-30 2013-10-17 콘티넨탈 오토모티브 게엠베하 분사 밸브용 밸브 조립체 및 분사 밸브
EP2436908A1 (de) * 2010-09-30 2012-04-04 Continental Automotive GmbH Ventilanordnung für ein Einspritzventil und Einspritzventil
EP2706221A1 (de) * 2012-09-07 2014-03-12 Continental Automotive GmbH Ventilanordnung für eine Brennstoffeinspritzdüse und Brennstoffeinspritzdüse
US10233883B2 (en) 2014-01-16 2019-03-19 Continental Automotive Gmbh Fuel injector
EP2896812A1 (de) * 2014-01-16 2015-07-22 Continental Automotive GmbH Kraftstoffeinspritzdüse
US9341154B2 (en) 2014-04-10 2016-05-17 Continental Automotive Gmbh Valve assembly for a fuel injector and fuel injector
EP3425191A1 (de) * 2017-07-05 2019-01-09 Delphi Technologies IP Limited Antirotationsvorrichtung einer nadel einer injektionsdüse
FR3068738A1 (fr) * 2017-07-05 2019-01-11 Delphi International Operations Luxembourg S.A R.L. Dispositif anti-rotation d'une aiguille de buse d'injection
CN108533433A (zh) * 2018-01-24 2018-09-14 中国第汽车股份有限公司 一种燃料喷射阀
CN108533433B (zh) * 2018-01-24 2019-10-29 中国第一汽车股份有限公司 一种燃料喷射阀

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