EP2236810B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
EP2236810B1
EP2236810B1 EP20090004290 EP09004290A EP2236810B1 EP 2236810 B1 EP2236810 B1 EP 2236810B1 EP 20090004290 EP20090004290 EP 20090004290 EP 09004290 A EP09004290 A EP 09004290A EP 2236810 B1 EP2236810 B1 EP 2236810B1
Authority
EP
European Patent Office
Prior art keywords
valve needle
needle body
valve
mass
spring
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
EP20090004290
Other languages
German (de)
English (en)
Other versions
EP2236810A1 (fr
Inventor
Antonio Agresta
Gianbattista Fischetti
Luigi Gargiulo
Marco Mechi
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 EP20090004290 priority Critical patent/EP2236810B1/fr
Publication of EP2236810A1 publication Critical patent/EP2236810A1/fr
Application granted granted Critical
Publication of EP2236810B1 publication Critical patent/EP2236810B1/fr
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
    • F02M61/20—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
    • F02M61/20—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
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention relates to an injection valve for injecting fluid.
  • 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 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 valve needle of the injection valve, which may, for example, be an electromagnetic 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.
  • US 6,523,759 B1 discloses that during operation of the injection valve, a close action of the valve needle to prevent dosing of fluid into the intake manifold or into the combustion chamber is followed by an unwanted reopen and close phase of the valve needle, called needle bounce.
  • a flow restrictor is disposed in an armature of the valve needle to restrict fluid flow towards an upstream end of the armature, resulting in a reduced bouncing of the valve needle.
  • An injection valve according to the preamble of claim 1 is disclosed in WO 89/10478 A1 .
  • the object of the invention is to create an injection valve which facilitates a reliable and precise function.
  • the invention is distinguished by an injection valve for injecting fluid comprising a central longitudinal axis and an injection valve housing with an injection valve cavity.
  • the injection valve further comprises a valve needle being axially moveable within the injection valve cavity.
  • the valve needle comprises a valve needle body and a sealing element being fixedly coupled to the valve needle body and preventing a fluid injection in a closing position and permitting the fluid injection in further positions.
  • the valve needle further comprises at least one mass element being axially moveable relative to the valve needle body and to the injection valve housing.
  • the valve needle comprises at least one spring element being coupled to the valve needle body with a first end and being coupled to the at least one mass element with a second end. The at least one spring element affects the at least one mass element in axial directions.
  • the valve needle body is for example coupled to an armature which is operable to be actuated by a solenoid in case of an electromagnetic actuated injection valve.
  • the valve needle body is preferably coupled to a piezoelectric actuator.
  • the injection valve cavity is designed to be filled with fluid.
  • the at least one mass element is operable to axially move within the fluid, accumulated within the injection valve cavity. This has the advantage that the kinetic energy of the valve needle body due to axial movements, which results in unwanted reopen phases of the sealing element and unwanted fluid injections, is dissipated and dampened. Additionally, the spring element at least partially absorbs the kinetic energy of the valve needle body. This reduces the bouncing of the sealing element and by this reduces the unwanted fluid injections.
  • the at least one mass element comprises a predetermined dimension.
  • the predetermine dimension comprises a predetermined size of a radial contact surface which contacts the fluid accumulated within the injection valve cavity.
  • the predetermined radial contact surface of the mass element provides a predetermined resistance to the fluid and/or the mass element and by this at least partially dissipates the kinetic energy of the moving valve needle body. This contributes to ensuring a reliable and precise function of the injection valve.
  • the at least one spring element is a helical spring. This contributes to ensuring a robust injection valve.
  • the valve needle comprises a first fixing element being fixedly coupled to the valve needle body.
  • the first fixing element comprises an external thread with a pitch different to a pitch of the at least one spring element.
  • the at least one spring element is screwed on the external thread of the first fixing element with its first end. I.e. the pitch of the spring at its first end differs from the pitch of the first fixing element. This contributes to ensuring a fixedly coupling of the at least one spring element to the first fixing element.
  • the at least one mass element comprises a central cavity.
  • the central cavity envelops the valve needle body and comprises an internal thread with a pitch different to the pitch of the at least one spring element.
  • the at least one spring element is screwed on the internal thread of the at least one mass element with its second end. I.e. the pitch of the spring at its second end differs from the pitch of the at least one mass element. This contributes to ensuring a fixedly coupling of the at least one spring element to the at least one mass element.
  • the valve needle comprises a second fixing element with a central opening.
  • the central opening envelops the valve needle body.
  • the second fixing element is fixedly coupled to the valve needle body.
  • the valve needle further comprises multiple mass elements being separated to each other. Each mass element is radially spaced to the second fixing element.
  • the valve needle comprises multiple spring elements, each being plate-typed and each being adopted to fixedly couple a particular mass element to the second fixing element.
  • the plate-typed spring elements contribute a radial contact surface to the radial contact surface of the multiple mass elements. This contributes to damping the axial movements of the valve needle body.
  • a spring rate of the particular spring element may be varied by varying the thickness of the particular plate and/or the radial distance between the second fixing element and the particular mass element.
  • the second fixing element, the multiple spring elements and the multiple mass elements are formed as a one piece component which is fixedly coupled to the valve needle body.
  • the valve needle comprises at least one first retainer with a predetermined radial expansion being fixedly coupled to the valve needle body.
  • the valve needle further comprises a second retainer with a predetermined radial expansion being fixedly coupled to the valve needle body.
  • the first and second retainer are axially spaced to each other.
  • the valve needle comprises the mass element being arranged between the first and second retainer.
  • the valve needle comprises multiple spring elements. At least one of the multiple spring elements is arranged between a first end of the mass element and the first retainer. At least one of the multiple spring elements is arranged between a second end of the mass element and the second retainer.
  • the at least first and second retainer may be a one piece component together with the valve needle body.
  • the mass element is preferably hollow-cylindrically shaped with a central opening enveloping the valve needle body.
  • the valve needle preferably comprises a radial clearance between the valve needle body and the mass element to facilitate an accumulation of fluid between the mass element and the valve needle body to reduce a friction between these components.
  • the valve needle may comprise more than one mass element, whereas it is also possible to axially space the multiple mass elements to each other and arrange additional spring elements between them.
  • the spring element may be a helical spring.
  • the multiple spring elements are o-rings with each enveloping the valve needle body.
  • the o-rings comprise elastic properties in particular in axial directions. The usage of o-rings facilitates a robust and simple injection valve.
  • valve needle comprises a first retainer with a predetermined radial expansion being fixedly coupled to the valve needle body.
  • the valve needle further comprises a second retainer with a predetermined radial expansion being fixedly coupled to the valve needle body.
  • the first and second retainer are axially spaced to each other.
  • the valve needle comprises the mass element being arranged between the first and second retainer.
  • the valve needle comprises multiple spring elements each being bellows-typed and each enveloping the valve needle body. A first spring element of the multiple spring elements is arranged between the first end of the mass element and the first retainer. A second spring element of the multiple spring elements is arranged between the second end of the mass element and the second retainer.
  • the at least first and second retainer may be a one piece component together with the valve needle body.
  • the mass element is preferably hollow-cylindrically shaped with a central opening enveloping the valve needle body.
  • the valve needle preferably comprises a radial clearance between the valve needle body and the mass element to facilitate an accumulation of fluid between the mass element and the valve needle body to reduce a friction between these components.
  • Each bellows-typed mass element comprises elastic properties, in particular in axial directions.
  • the valve needle may comprise more than one mass element, whereas it is also possible to axially space the mass elements to each other and arrange additional bellows-typed spring elements between them.
  • a first fluid volume is formed by the first retainer, the first spring element, the first end of the mass element and the valve needle body.
  • a second fluid volume is formed by the second retainer, the second spring element, the second end of the mass element and the valve needle body.
  • the at least one mass element envelops the valve needle body.
  • At least one predetermined radial clearance between the valve needle body and the mass element is provided.
  • the at least one radial clearance represents a fluid passage with a predetermined passage opening to hydraulically connect the first fluid volume with the second fluid volume.
  • the first and second fluid volume are designed to be filled with fluid.
  • the fluid passage with its predetermined opening contributes to damping the axial movements of the valve needle body.
  • the dampening effect due to the fluid passage may be varied by varying the diameter of the opening. This reduces the bouncing of the sealing element after impacting a valve needle seat.
  • the first and second spring element comprises steel. This facilitates a robust function of the injection valve.
  • Figure 1, 2 , 4 and 5 illustrate injection valves 100 in longitudinal section views, whereas only extractions of the particular longitudinal sections are depicted.
  • FIG. 1 A basical function of the injection valves 100 is described with figure 1 .
  • the injection valve 100 ( figure 1 ) that is in particular suitable for dosing fluid into an internal combustion engine, comprises an injection valve housing 40 with a central longitudinal axis LA, an injection valve cavity 30 and a valve needle 10.
  • the valve needle 10 comprises a valve needle body 20, a mass element 50, a sealing element 110 and a spring element 60.
  • the valve needle body 20 is operable to be actuated by an actuator of the injection valve 100, e.g. an electromagnetic actuator or a piezoelectric actuator. While being actuated, the valve needle body 20 moves axially within the injection valve cavity 30.
  • an actuator of the injection valve 100 e.g. an electromagnetic actuator or a piezoelectric actuator. While being actuated, the valve needle body 20 moves axially within the injection valve cavity 30.
  • the valve needle body 20 is fixedly coupled to the sealing element 110, e.g. welded or made in one piece.
  • the sealing element 110 has a spherical shape. Alternatively, the sealing element 110 has a conical shape. In a closing position, the sealing element 110 sealingly rests on a valve needle seat of the injection valve 100, by this preventing a fluid flow through at least one injection nozzle of the injection valve 100.
  • the injection nozzle may be, for example, an injection hole. However, it may also be of some other type suitable for dosing fluid.
  • the sealing element 110 permits the fluid injection into the combustion chamber in further positions, i.e. when it does not rest on the valve needle seat. The further positions represent non-closing positions.
  • the mass element 50 is axially moveable relative to the valve needle body 20 and to the injection valve housing 40.
  • the mass element 50 is disposed within the injection valve cavity 30 and comprises a predetermined dimension including a predetermined radial contact surface.
  • the injection valve cavity 30 is operable to be filled with fluid.
  • the spring element 60 is a helical spring and preferably made of stainless steel. A first end of the spring element 60 is fixedly coupled to the valve needle body 20 and a second end of the spring element 60 is fixedly coupled to the mass element 50. The spring element 60 affects the mass element 50 in axial directions.
  • the kinetic energy of the valve needle body 20 is at least partially absorbed due to the inertia of the mass element 50, axial moving within the injection valve cavity 30.
  • the predetermined dimension of the mass element 50 comprises the predetermined radial contact surface contacting the fluid accumulated within the injection valve cavity 30.
  • the predetermined radial contact surface of the mass element 50 provides a predetermined resistance to the mass element 50 if it axially moves within the injection valve cavity 30.
  • the valve needle 10 comprises a first fixing element 70.
  • the first fixing element 70 is fixedly coupled to the valve needle body 20, e.g. welded or a one piece component together with the valve needle body 20.
  • the first fixing element 70 comprises an external thread 90 with a predetermined pitch.
  • the pitch of the external thread 90 is different to a pitch of the spring element 60.
  • the spring element 60 is screwed on the external thread 90 of the first fixing element 70 with its first end. This fixedly couples the spring element 60 to the valve needle body 20 in an easy and efficient manner.
  • the spring element 60 is fixedly coupled to the valve needle body 20 via welding spots.
  • the mass element 50 comprises a central cavity 80.
  • the central cavity 80 envelops the valve needle body 20 and comprises an internal thread with a predetermined pitch being different to the pitch of the spring element 60.
  • the spring element 60 is screwed on the internal thread of the mass element 50 and by this fixedly coupled to the mass element 50.
  • the mass element 50 comprises an external thread where the spring element 60 is screwed on.
  • the mass element 50 is fixedly coupled to the spring element 60 via welding spots.
  • the mass element 50 is arranged between the first fixing element 70 and the sealing element 110.
  • the first fixing element 70 may be arranged between the mass element 50 and the sealing element 110.
  • the valve needle 10 comprises a second fixing element 75.
  • the second fixing element 75 comprises a central opening 150 enveloping the valve needle body 20.
  • the second fixing element 75 is fixedly coupled to the valve needle body 20, e.g. welded or a one piece component together with the valve needle body 20.
  • the valve needle 10 comprises multiple mass elements 50, e.g. three.
  • the mass elements 50 are separated to each other and each is radially spaced to the second fixing element 75.
  • Each mass element 50 is fixedly coupled to the second fixing element 75 via a particular spring element 60.
  • the particular spring element 60 according to figure 3 is plate-typed and preferably comprises an additional radial contact surface to the fluid accumulated within the injection valve cavity 30. This additionally dampens the axial movements of the valve needle body 20.
  • the spring rate of the particular spring element 60 can be varied by varying the thickness of the particular plate and/or by varying the radial distance between the second fixing element 75 and the particular mass element 50.
  • the second fixing element 75, the multiple mass elements 50 and the multiple spring elements 60 are preferably a one piece component.
  • the valve needle 10 comprises a first and second retainer 120, 130, with each having a predetermined radial expansion and with each being fixedly coupled to the valve needle body 20.
  • the first and second retainer 120, 130 are axially spaced to each other.
  • the mass element 50 is preferably hollow-cylindrically shaped and envelops the valve needle body 20.
  • the mass element 50 is axially arranged between the first and second retainer 120, 130.
  • the valve needle 10 may comprise more than one mass element 50.
  • the valve needle 10 comprises multiple o-rings, each comprising elastic properties and each representing a spring element 60.
  • the o-rings preferably envelop the valve needle body 20.
  • Three spring elements 60 are axially arranged between the first retainer 120 and a first end of the mass element 50.
  • Another three spring elements 60 are axially arranged between the second retainer 130 and a second end of the mass element 50.
  • the valve needle 10 of the injection valve 100 comprises the first and second retainer 120, 130 according to figure 4 .
  • the mass element 50 corresponds to the mass element 50 described in figure 4 .
  • the valve needle 10 comprises multiple spring elements 60, each being bellows-typed.
  • a first spring element 65 is axially arranged between the first retainer 120 and the first end of the mass element 50.
  • a second spring element 66 is axially spaced between the second retainer 130 and the second end of the mass element 50.
  • the multiple spring elements 60 comprise steel and provide elastic properties in axial directions.
  • the valve needle 10 comprises a first and second fluid volume 180, 190.
  • the first fluid volume 180 is formed by the first retainer 120, the first bellows-typed spring element 65, the first end of the mass element 50 and the valve needle body 20.
  • the second fluid volume 190 is formed by the second retainer 130, the second bellows-typed spring element 66, the second end of the mass element 50 and the valve needle body 20.
  • the first and second fluid volume 180, 190 are designed to be filled with fluid.
  • the valve needle 10 may comprise more than one mass element 50.
  • a radial clearance between the mass element 50 and the valve needle body 20 is provided with a predetermined opening.
  • the radial clearance represents a fluid passage 160 with a predetermined passage opening.
  • the fluid passage 160 hydraulically connects the first fluid volume 180 with the second fluid volume 190.
  • one of the fluid volumes 180, 109 is compressed and forces the fluid, accumulated within the particular fluid volume, to pass the fluid passage 160 towards the other fluid volume.
  • a pressure of the accumulated fluid within the compressed fluid volume due to the limited possibility of the fluid to flow into the other fluid volume, works against the compression of the compressed fluid volume and by this dampens the axial movement of the mass element 50 and the axial movement of the valve needle body 20.
  • the dampening may be varied by varying the diameter of the passage opening of the fluid passage 160.
  • Figure 6 depicts a time diagram illustrating a bounce of particular sealing elements.
  • a first characteristic 200 represents a lift L of the sealing element in an injection valve without reduced bouncing.
  • a second characteristic 210 represents the lift L of the sealing element 110 in the injection valve 100 according to figure 1 to 5 , i.e. with reduced bouncing.
  • a first lift L1 represents a non-closing position of the particular sealing element.
  • a second lift L2 represents the closing position of the particular sealing element.
  • the particular injection valve enters its closing phase.
  • the particular sealing element impacts the valve needle seat in a second point in time t2 to stop the fluid injection.
  • the injection valve without reduced bouncing of the sealing element has multiple unwanted reopen phases in which fluid is dispensed from the injection valve.
  • the fluid injection finally stops at a fourth point in time t4 in which the kinetic energy of the valve needle is dissipated.
  • the injection valve 100 has also multiple unwanted reopen phases, represented by the second characteristic 210.
  • the amount of reopen phases is significantly reduced.
  • the particular amplitudes representing the particular lifts of the sealing element 110 of the second characteristic 210 are significantly reduced compared to the particular amplitudes of the first characteristic 200.
  • the fluid injection finally stops at a third point in time t3, which is before the forth point in time t4.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (4)

  1. Soupape d'injection (100) destinée à injecter un fluide, comprenant :
    - un axe longitudinal central (LA) ;
    - une enveloppe de soupape d'injection (40) qui présente une cavité de soupape d'injection (30) ;
    - un pointeau de soupape (10) mobile de manière axiale à l'intérieur de la cavité de soupape d'injection (30) et comprenant :
    - un corps de pointeau de soupape (20) ;
    - un élément d'étanchéité (110) qui est accouplé de manière fixe au corps de pointeau de soupape et qui empêche une injection de fluide dans une position de fermeture et qui permet l'injection de fluide dans d'autres positions ;
    - au moins un élément de masse (50) qui est mobile de manière axiale par rapport au corps de pointeau de soupape (20) et à l'enveloppe de soupape d'injection (40) ;
    - au moins un élément de ressort (60) qui est accouplé au corps de pointeau de soupape (20) par une première extrémité et qui est accouplé à l'élément ou aux éléments de masse (50) par une seconde extrémité, en considérant que l'élément où les éléments de ressort (60) affectent le ou les éléments de masse (50) dans des directions axiales, l'élément de ressort (60) étant un ressort hélicoïdal ;
    caractérisé en ce que :
    le pointeau de soupape (10) comprend un premier élément de fixation (70) qui est accouplé de manière fixe au corps de pointeau de soupape (20) et comprend un filetage extérieur (90) avec un pas différent du pas de l'élément ou des éléments de ressort (60), en considérant que le ou les éléments de ressort (60) sont vissés sur le filetage extérieur (90) du premier élément de fixation (70) avec sa première extrémité.
  2. Soupape d'injection (100) selon la revendication 1, l'élément ou les éléments de masse (50) comprenant une dimension prédéterminée.
  3. Soupape d'injection (100) selon la revendication 1 ou la revendication 2, dans laquelle l'élément ou les éléments de masse (50) comprennent une cavité centrale (80), la cavité centrale (80) enveloppe le corps de pointeau de soupape (20) et comprend un filetage intérieur qui présente un pas différent du pas de l'élément ou des éléments de ressort (60), en considérant que l'élément ou les éléments de ressort (60) sont vissés dans le filtrage intérieur de l'élément ou des éléments de masse (50) avec leur seconde extrémité.
  4. Soupape d'injection (100) selon l'une quelconque des revendications précédentes, dans laquelle le pointeau de soupape (10) comprend :
    - un second élément de fixation (75) qui présente une ouverture centrale (150) qui enveloppe le corps de pointeau de soupape (20), le second élément de fixation (75) étant accouplé de manière fixe au corps de pointeau de soupape (20) ;
    - de multiples éléments de masse (50) séparés les uns des autres et chacun d'eux étant espacé de manière radiale par rapport au second élément de fixation (75) ; et
    - de multiples éléments de ressort (60), chacun d'eux étant du type à lames et étant adapté de façon à accoupler de manière fixe un élément de masse particulier (50) au second élément de fixation (75).
EP20090004290 2009-03-25 2009-03-25 Soupape d'injection Ceased EP2236810B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20090004290 EP2236810B1 (fr) 2009-03-25 2009-03-25 Soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090004290 EP2236810B1 (fr) 2009-03-25 2009-03-25 Soupape d'injection

Publications (2)

Publication Number Publication Date
EP2236810A1 EP2236810A1 (fr) 2010-10-06
EP2236810B1 true EP2236810B1 (fr) 2011-10-12

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Application Number Title Priority Date Filing Date
EP20090004290 Ceased EP2236810B1 (fr) 2009-03-25 2009-03-25 Soupape d'injection

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766405A (en) * 1987-04-14 1988-08-23 Allied Corporation Dynamic energy absorber
US4878650A (en) 1988-04-29 1989-11-07 Allied-Signal Inc. Armature with shear stress damper
US5139224A (en) * 1991-09-26 1992-08-18 Siemens Automotive L.P. Solenoid armature bounce eliminator
DE10060290A1 (de) * 2000-12-05 2002-06-06 Bosch Gmbh Robert Brennstoffeinspritzventil
FR2892156B1 (fr) * 2005-10-19 2008-01-18 Peugeot Citroen Automobiles Sa Dispositif d'amortissement des vibrations pour un injecteur de carburant

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EP2236810A1 (fr) 2010-10-06

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