EP3470658A1 - Ventilanordnung für ein einspritzventil und einspritzventil - Google Patents

Ventilanordnung für ein einspritzventil und einspritzventil Download PDF

Info

Publication number: EP3470658A1
Authority: EP; European Patent Office
Prior art keywords: valve; flap; fluid; frame; disc
Prior art date: 2017-10-10
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

EP17195766.5A

Other languages

English (en)

French (fr)

Other versions

EP3470658B1 (de

Inventor

Mauro Grandi

Luca Gestri

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.)

Vitesco Technologies 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.)

2017-10-10

Filing date

2017-10-10

Publication date

2019-04-17

2017-10-10 Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH

2017-10-10 Priority to EP17195766.5A priority Critical patent/EP3470658B1/de

2019-04-17 Publication of EP3470658A1 publication Critical patent/EP3470658A1/de

2020-07-15 Application granted granted Critical

2020-07-15 Publication of EP3470658B1 publication Critical patent/EP3470658B1/de

Status Active legal-status Critical Current

2037-10-10 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
- 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
- F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

the present invention relates to a valve assembly for an injection valve and to an injection valve for an internal combustion engine.
An injection valve for injecting fuel directly or indirectly into a combustion chamber of the vehicle is disclosed in document EP 2 333 297 B1 .
One typical problem of such injection valves, in particular of high pressure valves, is the generation of pressure waves or pressure pulsations caused by an injection event. Internal pressure pulsations cause problems in particular for multiple injection applications, because when pressure conditions inside the injector are not stable or not known at the time of opening of the valve, the amount of injected fuel cannot be controlled.
a valve assembly for an injection valve comprising a valve body with a central longitudinal axis comprising a cavity with a fluid inlet portion and a fluid outlet portion, wherein the cavity comprises a first portion extending from the fluid inlet portion to a bottom surface and a second portion extending from a central opening in the bottom surface down towards the fluid outlet portion.
the valve assembly further comprises 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, the valve needle extending through the central opening.
the valve assembly further comprises an armature of an electromagnetic actuator unit being designed to actuate the valve needle.
a one-way flap valve member is arranged above the central opening in the bottom surface and fixed to the valve body preventing fluid flow in the direction towards the fluid inlet portion.
the flap valve member may comprise an opening through which the valve needle extends.
the flap valve member is shaped and dimensioned such that all or substantially all fluid has to flow through the fluid passage provided by the flap valve member to reach the fluid outlet portion. That "substantially all fluid has to flow through the fluid passage” means in particular that leakage paths - e.g. through the opening through which the valve needle extends - may exist. However, e.g. 80% of the fluid, preferably 90 % or more of the fluid, flows through the fluid passage provided by the flap valve member.
the valve assembly has the advantage that a pressure wave generated by a closing event of the injector is not transmitted in the cavity towards the fluid inlet portion.
the flap valve member acts as a one-way valve stopping the pressure wave propagating inside the injector. Thus, the injection of fuel can be controlled more accurately.
the flap valve member is supported by the bottom surface. This embodiment has the advantage that the propagation of pressure waves can be blocked without any force transfer to the armature or the needle, which could lead to an uncontrolled reopening of the needle.
the flap valve member has a first part comprising a frame with a number of openings arranged therein, the frame being supported by the bottom surface.
the flap valve member furthermore has a second part comprising a flap disc with a number of flaps being designed to cover the openings, the flap disc being fixed to a lower side of the frame.
This design of the flap valve member has the advantage that it can be easily fitted into the valve body, and the frame can be supported by the bottom surface.
the frame may comprise an annular wall part comprising an annular wall being arranged coaxially with the valve body around the central longitudinal axis.
the frame may furthermore comprise a disc part being arranged perpendicular to the annular wall, the flap disc being fixed to the disc part.
This embodiment has the advantage that the annular wall part makes room for the flaps to open towards the fluid outlet portion.
a space is created directly above the bottom surface with the central opening, in which the flaps can open. The propagation of pressure waves is thereby confined to the second portion of the cavity and the interior space enclosed by the flap valve member.
this design of the flap valve member has the advantage that the annular wall part can be used to press-fit the flap valve member with the valve body.
the flap disc may be made of a flexible material, for example a metal. If the flexible material is a metal and the frame is also made of metal, the flap disc may be welded to the frame, for example by laser welding.
the flexible material may be a plastic material.
the frame comprises three or more openings and the flap disc comprises three or more flaps, each flap corresponding to one opening.
the number of openings and flaps can be varied according to the desired fluid flow through the injector.
the implementation of at least three flaps has the advantage, that the separate flaps are not too large and do not extend over an angle of more than 120° which could make opening of the flaps more difficult.
a fuel injection valve with the described valve assembly is provided.
the injection valve has the advantage that pressure pulsations cannot propagate inside the injector to act on the armature and cause the needle to reopen.
Figure 1 shows an injection valve 1 for the injection of fuel into an internal combustion engine.
the injection valve 1 comprises a valve assembly 3 with the valve body 4 with a central longitudinal axis L.
the valve body 4 comprises a cavity 9 with a fluid inlet portion 5 and fluid outlet portion 7.
the cavity 9 comprises a first portion 25 extending from the fluid inlet portion 5 to a bottom surface 29, where the valve body 4 forms a recess, and a second portion 27 extending from a central opening 31 in the bottom surface 29 down towards the fluid outlet portion 7.
a valve needle 11 is arranged axially movable in the cavity 9.
the valve needle 11 prevents a fluid flow through the fluid outlet portion 7 in a closing position.
the needle 11 has a ball 13 welded to its lower end which interacts with a valve seat (not shown in detail) of the valve body 4.
the injection valve 1 further comprises an electromagnetic actuator unit 20 to actuate the valve needle 11.
the actuator unit 20 comprises an armature 21 which may be fixed to the needle 11 or coupled to the needle 11 in some other way to cause the needle 11 to move axially in the cavity 9 in response to a magnetic field.
valve needle 11 When the magnetic field ceases, the valve needle 11 is moved downwards by the force of the calibration spring and the fluid outlet portion 7 is closed again.
the closing event generates a pressure wave that may propagate inside the cavity 9, act on the armature 21 and the needle 11 and cause the injection valve 1 to open again uncontrollably.
a one-way flap valve member 40 is arranged in the cavity 9 directly above the central opening 31 and therefore practically at the boundary between the first portion 25 and the second portion 27.
the one-way flap valve member 40 is fixed to the valve body 4 as can be seen from the detailed picture on the right hand side of figure 1 .
the flap valve member 40 comprises a first part 41 with the frame 42 which has an annular wall 43 which is arranged coaxially with the valve body 4 and which may be fixed to the valve body 4 by press fitting. Furthermore, the frame 42 is supported by the bottom surface 29.
the flap valve member 40 also comprises a number of flaps which are described in more detail with reference to the following figures.
the flap valve member 40 substantially prevents fluid flow in the direction towards the fluid inlet portion 5 and allows fluid flow in the direction towards the fluid outlet portion 7. Thus, the flap valve member 40 prevents pressure waves coming from the fluid outlet portion 7 to propagate into the first portion 25 of the cavity 9.
FIGS 2 to 6 show different views of the flap valve member 40.
the flap valve member 40 comprises a first part 41 with a frame 42 which has a number of openings 45 arranged therein. In the example shown in figures 2 to 6 , three openings 45 are arranged in a disc part 47 of the frame 42. Furthermore, a central opening 44 is also arranged in the disc part 47. The valve needle 11 extends through the central opening 44 in the frame 42.
the frame 42 furthermore comprises an annular wall 43 which extends on one side of the disc part 47 to form a cylindrical wall and which extends coaxially with the valve body 4 and with the needle 11 around the central longitudinal axis L.
the frame 42 may in particular be formed of a metal, for example steel.
the flap valve member 40 furthermore comprises a second part 48 with a flap disc 49 which comprises a number of flaps 51 grouped around a central opening 52 and divided from one another by slits 53.
the flap disc 49 may in particular be formed by a thin sheet of metal, for example steel.
the flap disc 49 may be formed of a plastic material.
the flap disc 49 is designed in a way to enable the flaps 51 to bend due to fuel pressure acting on the flaps 51 from above when the injection valve 1 opens.
the flap disc 49 is arranged on the lower side 46 of the disc part 47 of the frame 42.
the flap disc 49 is fixed to the disc part 47 along diameter of the central opening 52 as indicated by the line 55 shown in figure 2 . If the flap disc 49 is made of a metal, the flap disc 49 may be laser welded to the disc part 47 along the line 55.
Figure 4 shows a plan view of the flap valve member 40 with the second part 48 indicated by dotted lines. From this view it can be seen clearly that the flaps 51 overlap the openings 45.
Figures 5 and 6 show a cross-section through the flap valve member 40 along the line A-A of figure 4 .
Figure 5 shows the flap valve member 40 in a closed position, while figure 6 shows the flap valve member 40 in an open position.
the flaps 51 cover the openings 45 and will not open under the influence of fluid flow coming from the direction indicated by the arrow 57 because the flaps 51 overlap with the frame 42 and are larger than the openings 45.

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

EP17195766.5A 2017-10-10 2017-10-10 Ventilanordnung für ein einspritzventil und einspritzventil Active EP3470658B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
EP17195766.5A EP3470658B1 (de)	2017-10-10	2017-10-10	Ventilanordnung für ein einspritzventil und einspritzventil

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP17195766.5A EP3470658B1 (de)	2017-10-10	2017-10-10	Ventilanordnung für ein einspritzventil und einspritzventil

Publications (2)

Publication Number	Publication Date
EP3470658A1 true EP3470658A1 (de)	2019-04-17
EP3470658B1 EP3470658B1 (de)	2020-07-15

Family

ID=60080655

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP17195766.5A Active EP3470658B1 (de)	2017-10-10	2017-10-10	Ventilanordnung für ein einspritzventil und einspritzventil

Country Status (1)

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EP (1)	EP3470658B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6318646B1 (en) *	1999-03-26	2001-11-20	MAGNETI MARELLI S.p.A.	Fuel injector
EP1369579A1 (de) *	2002-06-07	2003-12-10	Magneti Marelli Powertrain S.p.A.	Brennstoffeinspritzdüse für eine Brennkraftmachine mit Mehrlochzerstäuber
EP2333297B1 (de)	2009-12-11	2013-03-20	Continental Automotive GmbH	Ventilanordnung für ein Einspritzventil und Einspritzventil
DE102014226367A1 (de) *	2014-12-18	2016-06-23	Robert Bosch Gmbh	Brennstoffeinspritzventil

2017
- 2017-10-10 EP EP17195766.5A patent/EP3470658B1/de active Active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6318646B1 (en) *	1999-03-26	2001-11-20	MAGNETI MARELLI S.p.A.	Fuel injector
EP1369579A1 (de) *	2002-06-07	2003-12-10	Magneti Marelli Powertrain S.p.A.	Brennstoffeinspritzdüse für eine Brennkraftmachine mit Mehrlochzerstäuber
EP2333297B1 (de)	2009-12-11	2013-03-20	Continental Automotive GmbH	Ventilanordnung für ein Einspritzventil und Einspritzventil
DE102014226367A1 (de) *	2014-12-18	2016-06-23	Robert Bosch Gmbh	Brennstoffeinspritzventil

Also Published As

Publication number	Publication date
EP3470658B1 (de)	2020-07-15

Publication	Publication Date	Title
EP2771562B1 (de)	2019-09-18	Ventilanordnung für ein einspritzventil und einspritzventil
EP2527637B1 (de)	2014-10-08	Injektor zum Einspritzen von Flüssigkeit
EP2569532B1 (de)	2017-09-13	Doppelpolige solenoid-direkteinspritzung für benzin
US9316191B2 (en)	2016-04-19	Valve assembly for an injection valve and injection valve
US8931718B2 (en)	2015-01-13	Valve assembly for an injection valve and injection valve
US8919372B2 (en)	2014-12-30	Valve assembly for an injection valve and injection valve
EP1801409B1 (de)	2008-08-27	Kraftstoffinjektor
EP2837813B1 (de)	2016-04-06	Ventilanordnung für ein Einspritzventil und Einspritzventil
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EP2954244A1 (de)	2015-12-16	Magnetventil mit einem anker in einem kolben
EP2149699B1 (de)	2014-09-24	Kraftstoffeinspritzdüse
EP3146194B1 (de)	2019-07-24	Injektor zum einspritzen von flüssigkeit
JPH0763135A (ja)	1995-03-07	燃料噴射弁
EP3279462B1 (de)	2020-05-06	Filteranordnung für ein einspritzventil, ventilanordnung und einspritzventil
EP3636911A1 (de)	2020-04-15	Ventilanordnung für ein einspritzventil und kraftstoffeinspritzventil
EP2065591B1 (de)	2010-02-17	Brennstoffeinspritzdüse mit mechanischer Dämpfung
EP3470659B1 (de)	2020-09-09	Antireflexionsvorrichtung für kraftstoffeinspritzventil und kraftstoffeinspritzventil
EP2067981B1 (de)	2011-02-16	Ventilanordnung für ein Einspritzventil und Einspritzventil
JP7135705B2 (ja)	2022-09-13	電磁弁
EP3153697A1 (de)	2017-04-12	Ventilmontageanordnung für ein einspritzventil und einspritzventil
EP3611368A1 (de)	2020-02-19	Ventilanordnung und flüssigkeitsinjektionsventil
JP2022139378A (ja)	2022-09-26	電磁式燃料噴射弁
EP2241743B1 (de)	2014-07-02	Ventilanordnung für ein Einspritzventil und Einspritzventil
EP2863044B1 (de)	2016-06-29	Einspritzventil
KR100472873B1 (ko)	2005-04-19	연료분사기용전자계량밸브

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