EP2597296A1 - 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
EP2597296A1
EP2597296A1 EP11190294.6A EP11190294A EP2597296A1 EP 2597296 A1 EP2597296 A1 EP 2597296A1 EP 11190294 A EP11190294 A EP 11190294A EP 2597296 A1 EP2597296 A1 EP 2597296A1
Authority
EP
European Patent Office
Prior art keywords
valve
armature
valve needle
fluid
cavity
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
EP11190294.6A
Other languages
German (de)
English (en)
Other versions
EP2597296B1 (fr
Inventor
Paolo Bertini
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 EP11190294.6A priority Critical patent/EP2597296B1/fr
Publication of EP2597296A1 publication Critical patent/EP2597296A1/fr
Application granted granted Critical
Publication of EP2597296B1 publication Critical patent/EP2597296B1/fr
Not-in-force 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
    • 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
    • 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
    • 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
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

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 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 and an injection valve which facilitate a reliable and precise function of the injection valve.
  • the invention is distinguished by a valve assembly for an injection valve, with a valve body including a central longitudinal axis, the valve body comprising a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, an upper retainer being arranged in the cavity and being fixedly coupled to the valve needle, an electro-magnetic actuator unit being designed to actuate the valve needle, the actuator unit comprising an armature arrangement which is arranged in the cavity and is axially moveable relative to the valve needle, the armature arrangement being designed to be coupled to the upper retainer when the valve needle leaves the closing position, and the armature arrangement being designed and arranged to mechanically decouple from the upper retainer due to its inertia when the valve needle reaches the closing position, and an armature spring being arranged in the cavity and being coupled to the armature
  • the armature arrangement comprises an armature portion and a protruding portion, whereby the protruding portion protrudes axially towards the fluid outlet portion.
  • a dampening apparatus is arranged in the cavity axially adjacent to the armature arrangement.
  • the dampening apparatus comprises a cup being fixedly coupled to the valve body and a major part of the protruding portion of the armature arrangement.
  • the major part of the protruding portion of the armature arrangement is arranged inside of the cup, thereby forming a volume inside the cup for being filled with fluid during operation of the valve assembly.
  • Figure 1 shows, just for the purpose of better understanding the invention, a traditional injection valve 10 that is suitable for dosing fluids and which comprises a traditional valve assembly 11 and an inlet tube 14.
  • the injection valve 10 may be in particular suitable for dosing fuel to an internal combustion engine.
  • the valve assembly 11 comprises a valve body 12 with a central longitudinal axis L and a housing 16.
  • the 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 22c.
  • An upper retainer 23 is arranged axially adjacent to the armature 22c.
  • the upper retainer 23 is fixedly coupled to the valve needle 20.
  • the upper retainer 23 is formed as a collar around the valve needle 20.
  • a main spring 28 is arranged in a recess 26 provided in the inlet tube 14.
  • the recess 26 is part of the cavity 18.
  • the main spring 28 is mechanically coupled to the upper retainer 23.
  • the upper retainer 23 is in contact with an inner side of the inlet tube 14 and can guide the valve needle 20 in axial direction inside the inlet tube 14.
  • the main spring 28 is arranged and designed to act on the valve needle 20 to move the valve needle 20 in axial direction in its closing position.
  • a filter element 30 is arranged in the inlet tube 14 and forms a further seat for the main spring 28.
  • valve needle 20 In a closing position of the valve needle 20 it sealingly rests on a seat plate 32 by this preventing a fluid flow through an injection nozzle 34. That part of the valve needle 20 resting on the seat plate 32 may be formed like a ball.
  • 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.
  • the electro-magnetic actuator unit 36 comprises, with this traditional valve assembly, the armature 22c.
  • the armature 22c is arranged in the cavity 18 and axially movable relative to the valve needle 20.
  • the housing 16, the valve body 12, the inlet tube 14 and the armature 22c are forming an electromagnetic circuit.
  • a fluid outlet portion 40 is a part of the cavity 18 near the seat plate 32.
  • the fluid outlet portion 40 communicates with a fluid inlet portion 42 being provided in the valve body 12.
  • An armature spring 46 which is preferably a coil spring is arranged in the cavity 18 and is fixedly coupled to the valve body 12.
  • the armature spring 46 is arranged axially adjacent to the armature 22c.
  • the armature spring 46 is coupled to the armature 22c.
  • Fig. 2 shows a valve assembly according to the invention.
  • the armature 22c of the traditional valve assembly as shown in Fig. 1 is replaced by an armature arrangement 22 comprising an armature portion 22a and a protruding portion 22b.
  • the armature portion 22a and the protruding portion 22b may be made of one piece or of more than one piece.
  • the armature portion 22a functionally corresponds to the armature 22c of the traditional valve assembly.
  • the protruding portion 22b protrudes, from the armature portion 22a, axially towards the fluid outlet portion 40.
  • a dampening apparatus 50 comprising a cup 52 and a major part of the protruding portion 22b of the armature arrangement 22.
  • the cup 52 may either be fixedly coupled to the valve needle 20 or to the valve body 12.
  • volume 53 Inside of the cup 52 there is a volume 53 arranged between an end of the protruding portion 22b and in inner bottom surface of the cup 52. During operation of the valve assembly this volume 53 is filled with fluid, typically with fuel, whereby the size of the volume 53 varies during operation of the valve assembly.
  • a first clearance 54 through which fluid may pass during operation of the valve assembly.
  • a second clearance 55 is arranged between the valve needle 20 and an inner side wall of the armature arrangement 22. Also through this second clearance 55 fluid may pass during operation of the valve assembly.
  • valve assembly 11 In the following, the function of the valve assembly 11 and of the injection valve 10 is described in detail:
  • the fluid is led through the inlet tube 14 to the fluid inlet portion 42 of the valve assembly 11 and further 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.
  • Fig. 2 shows the valve assembly 11 in the closing position.
  • the actuator unit 36 is de-energized.
  • the armature spring 46 presses the armature arrangement 22 towards the upper retainer 23 and the main spring 28 presses the valve needle 20 via the upper retainer 23 into its closing position.
  • the volume 53 is filled with fluid.
  • the electro-magnetic actuator unit 36 with the coil 38 gets energized. This creates an electro-magnetic force onto the armature arrangement 22.
  • the armature arrangement 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 arrangement 22 takes the upper retainer 23 and the valve needle 20 with it, until it is stopped by the pole piece 37. This action is called functional armature stroke, and it is shown in the Fig. 2 to 5 , labeled with the reference symbol Fc_A. Accordingly, the valve needle 20 moves in axial direction out from the closing position.
  • a fluid path is formed between the seat plate 32 and the valve needle 20 and fluid can pass through the injection nozzle 34.
  • the cup 52 is fixedly coupled to the valve needle 20. Accordingly, the size of the volume 53 is not changed due to the upward movement of the valve needle 20, compared with the size of the volume 53, when the valve needle 20 rests in its closing position.
  • the actuator unit 36 is de-energized.
  • the main spring 24 forces the valve needle 20 to move in axial direction into its closing position, thereby moving the armature arrangement 22 towards the seat plate 32 and compressing the armature spring 46.
  • the valve needle 20 reaches its closing position, it is stopped.
  • the armature arrangement 22 decouples from the upper retainer 23 and continues to move towards the seat plate 32 because of its inertia; it drifts away from the upper retainer 23. This drift is called free armature stroke; the amount thereof is shown in Fig.
  • valve assembly and of the respective injection valve is, that in an embodiment, where the cup 52 is fixedly coupled to the valve body 12, abutting of the armature arrangement 22 against the upper retainer 23 and the pole piece 37 (in this situation the volume 53 increases and drift of fuel occurs into the cup 52), when the valve needle 20 leaves its closing position, as well as abutting of the valve needle 20 against the seat plate 32 when reaching its closing position, is hydraulically dampened by the flow of fluid through the leakage paths 56.
  • the valve needle bouncingly bumps towards the seat plate and thus reopens in an undesired manner the flow path to the injection nozzle for a short time. Reopening, however, would create unwanted emissions.

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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)
EP11190294.6A 2011-11-23 2011-11-23 Ensemble de soupape pour soupape d'injection et soupape d'injection Not-in-force EP2597296B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11190294.6A EP2597296B1 (fr) 2011-11-23 2011-11-23 Ensemble de soupape pour soupape d'injection et soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11190294.6A EP2597296B1 (fr) 2011-11-23 2011-11-23 Ensemble de soupape pour soupape d'injection et soupape d'injection

Publications (2)

Publication Number Publication Date
EP2597296A1 true EP2597296A1 (fr) 2013-05-29
EP2597296B1 EP2597296B1 (fr) 2014-10-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11190294.6A Not-in-force EP2597296B1 (fr) 2011-11-23 2011-11-23 Ensemble de soupape pour soupape d'injection et soupape d'injection

Country Status (1)

Country Link
EP (1) EP2597296B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016207268A1 (fr) * 2015-06-24 2016-12-29 Robert Bosch Gmbh Soupape de dosage d'un fluide
EP3184794A1 (fr) * 2015-12-21 2017-06-28 Continental Automotive GmbH Ensemble de soupape et soupape d'injection de fluide
WO2017207268A1 (fr) * 2016-06-02 2017-12-07 Continental Automotive Gmbh Ensemble de soupape pour soupape d'injection et soupape d'injection
KR20180066223A (ko) * 2015-10-15 2018-06-18 콘티넨탈 오토모티브 게엠베하 튀어오름 방지 디바이스를 구비한 연료 분사 밸브, 연소 기관 및 차량
EP3339627A1 (fr) * 2016-12-23 2018-06-27 Continental Automotive GmbH Ensemble de soupape et soupape d'injection de fluide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10130205A1 (de) * 2001-06-22 2003-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1460263A1 (fr) * 2003-03-19 2004-09-22 Siemens Aktiengesellschaft Soupape d'injection avec une aiguille précontrainte par un ressort
EP1602821A1 (fr) * 2004-06-02 2005-12-07 Denso Corporation Soupape d'injection de carburant
EP2067982A1 (fr) * 2006-09-25 2009-06-10 Hitachi Ltd. Soupape d'injection de carburant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10130205A1 (de) * 2001-06-22 2003-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1460263A1 (fr) * 2003-03-19 2004-09-22 Siemens Aktiengesellschaft Soupape d'injection avec une aiguille précontrainte par un ressort
EP1602821A1 (fr) * 2004-06-02 2005-12-07 Denso Corporation Soupape d'injection de carburant
EP2067982A1 (fr) * 2006-09-25 2009-06-10 Hitachi Ltd. Soupape d'injection de carburant

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018518629A (ja) * 2015-06-24 2018-07-12 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 流体を調量する弁
WO2016207268A1 (fr) * 2015-06-24 2016-12-29 Robert Bosch Gmbh Soupape de dosage d'un fluide
US10519909B2 (en) 2015-06-24 2019-12-31 Robert Bosch Gmbh Valve for metering a fluid
KR102119988B1 (ko) 2015-10-15 2020-06-17 콘티넨탈 오토모티브 게엠베하 튀어오름 방지 디바이스를 구비한 연료 분사 밸브, 연소 기관 및 차량
KR20180066223A (ko) * 2015-10-15 2018-06-18 콘티넨탈 오토모티브 게엠베하 튀어오름 방지 디바이스를 구비한 연료 분사 밸브, 연소 기관 및 차량
US10731614B2 (en) 2015-10-15 2020-08-04 Continental Automotive Gmbh Fuel injection valve with an anti bounce device
WO2017108657A1 (fr) * 2015-12-21 2017-06-29 Continental Automotive Gmbh Ensemble soupape et soupape d'injection de fluide
US10570862B2 (en) 2015-12-21 2020-02-25 Continental Automotive Gmbh Valve assembly and fluid injection valve
EP3184794A1 (fr) * 2015-12-21 2017-06-28 Continental Automotive GmbH Ensemble de soupape et soupape d'injection de fluide
WO2017207268A1 (fr) * 2016-06-02 2017-12-07 Continental Automotive Gmbh Ensemble de soupape pour soupape d'injection et soupape d'injection
CN109154261A (zh) * 2016-06-02 2019-01-04 大陆汽车有限公司 用于喷射阀的阀组件以及喷射阀
KR20190015417A (ko) * 2016-06-02 2019-02-13 콘티넨탈 오토모티브 게엠베하 분사 밸브용 밸브 조립체 및 분사 밸브
KR102170838B1 (ko) 2016-06-02 2020-10-28 콘티넨탈 오토모티브 게엠베하 분사 밸브용 밸브 조립체 및 분사 밸브
CN109154261B (zh) * 2016-06-02 2021-06-08 大陆汽车有限公司 用于喷射阀的阀组件以及喷射阀
EP3339627A1 (fr) * 2016-12-23 2018-06-27 Continental Automotive GmbH Ensemble de soupape et soupape d'injection de fluide
WO2018115190A1 (fr) * 2016-12-23 2018-06-28 Continental Automotive Gmbh Ensemble soupape et soupape d'injection de fluide

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