EP2097636B1 - Brennstoffeinspritzvorrichtung für einen verbrennungsmotor - Google Patents

Brennstoffeinspritzvorrichtung für einen verbrennungsmotor Download PDF

Info

Publication number
EP2097636B1
EP2097636B1 EP07858098A EP07858098A EP2097636B1 EP 2097636 B1 EP2097636 B1 EP 2097636B1 EP 07858098 A EP07858098 A EP 07858098A EP 07858098 A EP07858098 A EP 07858098A EP 2097636 B1 EP2097636 B1 EP 2097636B1
Authority
EP
European Patent Office
Prior art keywords
pintle
spray aperture
fuel
annular channel
valve seat
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.)
Not-in-force
Application number
EP07858098A
Other languages
English (en)
French (fr)
Other versions
EP2097636A1 (de
Inventor
Giovanni Corbinelli
Guy Hoffmann
Didier Robart
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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
Priority claimed from GBGB0625770.3A external-priority patent/GB0625770D0/en
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP07858098A priority Critical patent/EP2097636B1/de
Publication of EP2097636A1 publication Critical patent/EP2097636A1/de
Application granted granted Critical
Publication of EP2097636B1 publication Critical patent/EP2097636B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • 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
    • F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188

Definitions

  • the present invention relates to a fuel injector and in particular to a fuel injector for direct injection of gasoline into the combustion chamber of an internal combustion engine.
  • a typical outwardly opening fuel injector is shown in Fig. 1 , comprising, a valve body having a tip portion 2 defining a spray aperture 3, a pintle 4 or valve stem extending within the tip portion 2 for axial movement between an extended and a retracted position, the pintle 4 having a head 5 having a tapered portion 6 engageable with a valve seat 8 of the spray aperture to close the spray aperture 3 when the pintle 4 is in its retracted position, a return spring (not shown) biasing the pintle 4 towards its retracted position, an actuating means (not shown), such as a solenoid or piezostack, acting upon the pintle 4 to urge the pintle 4 to its extended position when the actuating means is energised.
  • actuating means such as a solenoid or piezostack
  • the pintle opening is limited by an end stop which is typically the top surface of one of the guides.
  • the flow rate of fuel through the injector is largely dependent upon the gap between the pintle head and the valve seat which is dependent upon stroke of the pintle.
  • a typical fuel injector having a pintle stroke of between 30 ⁇ m and 40 ⁇ m and a fuel supply pressure of 200 bar a 3% variation in the flow rate is experienced for each micron variation in the pintle stroke.
  • there is a high sensitivity to pintle stroke variation requiring very high manufacturing tolerances of the end stop, pintle and associated components to achieve the required flow rate.
  • variation in the pintle stroke over time due to wear and/or differential thermal expansion can lead to undesirable variation in the fuel flow rate.
  • a fuel injector comprising an injector body having a spray aperture; a pintle extending within the injector body for axial movement between a closed position, wherein a head of the pintle engages a valve seat of the spray aperture to seal the spray aperture, and an open position, wherein the pintle head is spaced from the valve seat to permit fuel to flow through said spray aperture, actuating means being provided for selectively moving the pintle towards its open position; said pintle head comprising a tapered portion engageable against the valve seat of the spray aperture and a cylindrical portion upstream of said tapered portion, an annular channel being provided defining a first part of a flow passage upstream of the spray aperture, wherein a discontinuity is provided downstream of the annular channel and upstream of the spray aperture to generate cavitation when the pintle stroke exceeds a predetermined limit to thereby generate a virtual channel of constant cross section downstream of the annular channel whereby the flow rate of the fuel flowing through said spray aperture is substantially independent of the
  • said annular channel is defined between a substantially cylindrical portion of the pintle and a concentric portion of the injector body.
  • the discontinuity may be provided on the pintle head between the cylindrical portion and the tapered portion thereof.
  • the discontinuity may be provided on the injector body between the concentric portion thereof and the valve seat.
  • the discontinuity may comprise a chamfered or stepped surface or any other suitable structure leading to detachment of the flow from a surface of the annular channel.
  • a virtual channel of constant cross-section is created between the tapered portion and the valve seat to provide a constant flow velocity substantially independent of the pintle stroke, preventing flow deceleration due to stroke variations and avoiding energy losses downstream of the annular channel.
  • the maximum flow rate through the spray aperture can be made substantially independent of the maximum stroke of the pintle.
  • the required maximum flow rate can be calibrated for a particular application by appropriate selection of the relative dimensions of the discontinuity, the clearance between cylindrical portion between the pintle head and the valve body and the stroke.
  • the fuel is channelled and accelerated in the first part of the flow passage between the cylindrical portion of the pintle head and the valve body.
  • the flow of liquid fuel detaches from the valve body at the discontinuity, creating a low pressure region wherein the fuel cavitates (i.e. the local pressure falls below the vapour pressure of the fuel such that the liquid fuel becomes a vapour).
  • the cavitation takes place in a flow area which is dependent on pintle stroke, therefore the cavitation zone is self adjusting and gets larger with increasing pintle stroke to maintain a constant effective flow area of liquid fuel, such that static pressure is not recovered and the flow of fuel does not decelerate.
  • the flow area of the sealing band increases with increasing pintle stroke, causing the flow velocity to decrease and causing a loss of energy and affecting spray atomisation.
  • the creation of a self adjusting cavitation bubble downstream of the cylindrical portion creates a virtual channel of constant cross section, avoiding a deceleration of the fuel flow and thus avoiding such energy losses.
  • the present invention provides also a method of manufacturing a fuel injector, said fuel injector comprising an injector body having a spray aperture; a pintle extending within the injector body for axial movement between a closed position, wherein a head of the pintle engages a valve seat of the spray aperture to seal the spray aperture, and an open position, wherein the pintle head is spaced from the valve seat to permit fuel to flow through said spray aperture, said pintle head comprising a tapered portion engageable against the valve seat of the spray aperture and a cylindrical portion upstream of said tapered portion, said method comprising the steps of providing an annular channel defining a first part of a flow passage upstream of the spray aperture, and providing a discontinuity downstream of the annular channel and upstream of the spray aperture to generate cavitation when the pintle stroke exceeds a predetermined limit to thereby generate a virtual channel of constant cross section downstream of the annular channel whereby the flow rate of the fuel flowing through said spray aperture is substantially independent of the stroke of the pintle when
  • the relative dimensions of the annular channel, the discontinuity, and the gap between the valve seat and the tapered portion of the pintle head when the pintle is in its fully open position are selected as a function of one or more physical property of the fuel to be injected in order to generate said cavitation downstream of said annular channel.
  • Said one or more physical properties of the fuel comprise one or more of the fuel vapour pressure, density and the fuel viscosity.
  • a fuel injector nozzle has two functions:
  • the flow rate variation is 1 g/s per ⁇ m stroke (3.3% of the nominal value).
  • the injector specification requires a variation of the flow rate of no more than 2% per ⁇ m lift.
  • the current nozzle design (shown in figure 1 ) does not meet such requirement as the metering flow area is directly link to the injector stroke and its variation is 3.4% per ⁇ m stroke variation.
  • the present invention achieves the objectives of improving the metering accuracy and maintaining the good spray characteristics by generating cavitation upstream of a tapered portion of the pintle head generating a virtual flow channel of constant cross section between the pintle head and the valve seat to prevent changes in the flow rate of fuel through the injector nozzle.
  • the fuel injector comprises an injector body including a tip portion 10 having a spray aperture 12 at a distal end thereof.
  • a pintle 14 extends within the tip portion 10, the pintle 14 having a head 16 provided with a tapered sealing portion 18 engageable with a correspondingly tapered valve seat 20 surrounding the spray aperture 12 to close the spray aperture 12.
  • the pintle 14 is axially moveable within the tip portion 10 between a retracted position, wherein a region of the tapered sealing portion 18 of the head 16 engages the valve seat 20 to close the spray aperture 12, and an extended position, wherein tapered sealing portion 18 of the head 16 is spaced from the valve seat 20.
  • a return spring is typically provided to bias the pintle 14 towards its retracted position.
  • an end stop (not shown), defined by an upper end of a tubular sleeve or pintle guide cooperates with a collar on the pintle 14 to limit the extension of the pintle and define the stroke of the pintle.
  • a solenoid actuator (not shown) having an electromagnetic coil and a moveable armature may be provided to selectively urge the pintle 14 to its extended position.
  • a cylindrical portion 22 Upstream of the tapered sealing portion 18 of the head 16 of the pintle 14 there is provided a cylindrical portion 22 which cooperates with a concentric inner wall region 24 of the tip portion 10 to define an annular flow channel 26 for accelerating and channelling the fuel flow between the pintle head 16 and the wall region 24 when the pintle 14 is in its fully open position.
  • a discontinuity is formed at the downstream end of the annular flow channel 26 to cause the fuel flow to detach from a wall of the channel and thus cause cavitation.
  • this discontinuity is defined by a chamfered surface 30 of the wall region 24 of the tip portion 10, upstream of the valve seat 20.
  • a step or any other formation enabling flow detachment and thus the generation of cavitation may be utilised and the discontinuity may be formed on either one or both of the pintle head and the tip portion of the injector body.
  • the chamfered surface 30 generates a cavitating zone 40 (as shown in Fig. 4 ) when the pintle stroke exceeds a critical stroke value due to fuel detaching from the chamfer edge and creating a low pressure region wherein the liquid fuel vaporises. This has two positive effects:
  • the cavitating zone 40 may be generated by a step 50 (as shown in Fig. 5 ) or other discontinuity on the pintle head or on the valve seat profile.
  • the step 50 may be easier to manufacture, taking into account the very small dimensions and tolerances in the tip portion 10 of the injector body.
  • Figures 3 shows the improvements in terms of dependence of the flow rate versus stroke variation.
  • the flow rate increases linearly with the stroke, while with the proposed according to the present invention there is a stroke value (critical stroke) above which the flow becomes almost independent from the stroke.
  • the require maximum flow rate can be calibrated for a particular application by appropriate selection of the relative dimensions of the discontinuity, the clearance between cylindrical portion between the pintle head and the valve body and the stroke and these dimensions can be changed depending on customer requirements.
  • the static flow rate is less sensitive to the stroke variation (flow rate variation ⁇ 2% per ⁇ m) and it is possible to adjust the nominal static flow rate based on the customer needs by changing the abovementioned relative dimensions without affecting the spray characteristics.
  • a method of manufacturing the above described fuel injector comprises the steps of providing an annular channel 26 defining a first part of a flow passage upstream of the spray aperture 12, and providing a discontinuity 30, 50 downstream of the annular channel 26 and upstream of the spray aperture to generate cavitation when the pintle stroke exceeds a predetermined limit to thereby generate a virtual channel of constant cross section downstream of the annular channel 26 whereby the flow rate of the fuel flowing through said spray aperture is substantially independent of the stroke of the pintle when the pintle is in its open position.
  • the relative dimensions of the annular channel 26, the discontinuity 30, 50, and the gap between the valve seat and the tapered portion of the pintle head when the pintle is in its fully open position are selected as a function of one or more physical property of the fuel to be injected in order to generate said cavitation downstream of said annular channel.
  • Said one or more physical properties of the fuel comprise one or more of the fuel vapour pressure, density and the fuel viscosity.

Landscapes

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

Claims (8)

  1. Kraftstoffinjektor, der aufweist einen Injektorkörper (10) mit einer Sprayöffnung (12); einen Zapfen (14), der sich in dem Injektorkörper erstreckt für eine axiale Bewegung zwischen einer geschlossenen Position, in der ein Kopf (16) des Zapfens mit einem sich verjüngenden Ventilsitz (20) der Sprayöffnung in Eingriff ist, wobei der sich verjüngende Ventilsitz (20) die Sprayöffnung (12) umgibt, um die Sprayöffnung abzudichten, und einer offenen Position, in der der Zapfenkopf von dem Ventilsitz beabstandet ist, um zu ermöglichen, dass Kraftstoff durch die Sprayöffnung fließen kann, wobei Betätigungsmittel vorgesehen sind zum selektiven Bewegen des Zapfens in seine offene Position; wobei der Zapfenkopf (16) einen sich verjüngenden Teil (18) aufweist, der in Eingriff gebracht werden kann mit dem entsprechenden sich verjüngenden Ventilsitz (20) der Sprayöffnung, und einen zylindrischen Teil (22) stromaufwärts von dem sich verjüngenden Teil, wobei ein Ringkanal (26) vorgesehen ist, der einen ersten Teil eines Strömungsdurchlasses stromaufwärts von der Sprayöffnung (12) definiert, dadurch gekennzeichnet, dass eine Diskontinuität (30, 50), die zu einer Trennung des Stromes von einer Oberfläche des Ringkanals führt, stromabwärts des Ringkanals (26) und stromaufwärts der Sprayöffnung vorgesehen ist, um eine Kavitation zu erzeugen, wenn der Zapfenhub eine vorgegebene Grenze überschreitet, um dadurch einen virtuellen Kanal mit konstantem Querschnitt stromabwärts des Ringkanals (26) zu erzeugen, wodurch die Durchflussrate des Kraftstoffs, der durch die Sprayöffnung strömt, im Wesentlichen unabhängig ist von dem Hub des Zapfens, wenn der Zapfen in seiner offenen Position ist, wobei die relativen Dimensionen des Ringkanals (26), der Diskontinuität (30, 50) und des Abstands zwischen dem Ventilsitz (20) und dem sich verjüngenden Teil des Zapfenkopfs, wenn der Zapfen in seiner vollständig offenen Position ist, gewählt sind als eine Funktion einer oder mehrerer physikalischer Eigenschaften des zu injizierenden Kraftstoffs, um die Kavitation stromabwärts von dem Ringkanal zu erzeugen.
  2. Kraftstoffinjektor gemäß Anspruch 1, wobei der Ringkanal (26) zwischen einem im Wesentlichen zylindrischen Teil (22) des Zapfens und einem konzentrischen Teil (24) des Injektorkörpers definiert ist.
  3. Kraftstoffinjektor gemäß Anspruch 2, wobei die Diskontinuität an dem Zapfenkopf (16) zwischen dem zylindrischen Teil (22) und seinem sich verjüngenden Teil (18) vorgesehen ist.
  4. Kraftstoffinjektor gemäß Anspruch 2, wobei die Diskontinuität (30) an dem Injektorkörper zwischen seinem konzentrischen Teil (24) und dem Ventilsitz (20) vorgesehen ist.
  5. Kraftstoffinjektor gemäß einem vorhergehenden Anspruch, wobei die Diskontinuität (30) eine abgeschrägte Oberfläche aufweist.
  6. Kraftstoffinjektor gemäß einem vorhergehenden Anspruch, wobei die Diskontinuität (50) eine gestufte Oberfläche aufweist.
  7. Verfahren zur Herstellung eines Kraftstoffinjektors, wobei der Kraftstoffinjektor aufweist einen Injektorkörper (10) mit einer Sprayöffnung (12); einen Zapfen (14), der sich in dem Injektorkörper erstreckt für eine axiale Bewegung zwischen einer geschlossenen Position, in der ein Kopf (16) des Zapfens mit einem sich verjüngenden Ventilsitz (20) der Sprayöffnung in Eingriff ist, wobei der sich verjüngende Ventilsitz (20) die Sprayöffnung (12) umgibt, um die Sprayöffnung abzudichten, und einer offenen Position, in der der Zapfenkopf von dem Ventilsitz beabstandet ist, um zu ermöglichen, dass Kraftstoff durch die Sprayöffnung fließen kann, wobei der Zapfenkopf (16) einen sich verjüngenden Teil (18) aufweist, der in Eingriff gebracht werden kann mit dem entsprechenden sich verjüngenden Ventilsitz der Sprayöffnung, und einen zylindrischen Teil (22) stromaufwärts von dem sich verjüngenden Teil, wobei das Verfahren aufweist den Schritt eines Vorsehens eines Ringkanals (26), der einen ersten Teil eines Strömungsdurchlasses stromaufwärts von der Sprayöffnung (12) definiert, dadurch gekennzeichnet, dass das Verfahren weiter aufweist den Schritt eines Vorsehens einer Diskontinuität (30, 50) stromabwärts des Ringkanals (26) und stromaufwärts der Sprayöffnung, die zu einer Trennung des Stromes von einer Oberfläche des Ringkanals führt, um eine Kavitation zu erzeugen, wenn der Zapfenhub eine vorgegebene Grenze überschreitet, um dadurch einen virtuellen Kanal mit konstantem Querschnitt stromabwärts des Ringkanals (26) zu erzeugen, wodurch die Durchflussrate des Kraftstoffs, der durch die Sprayöffnung strömt, im Wesentlichen unabhängig ist von dem Hub des Zapfens, wenn der Zapfen in seiner offenen Position ist, wobei die relativen Dimensionen des Ringkanals (26), der Diskontinuität (30, 50) und des Abstands zwischen dem Ventilsitz und dem sich verjüngenden Teil des Zapfenkopfs, wenn der Zapfen in seiner vollständig offenen Position ist, gewählt sind als eine Funktion einer oder mehrerer physikalischer Eigenschaften des zu injizierenden Kraftstoffs, um die Kavitation stromabwärts von dem Ringkanal zu erzeugen.
  8. Verfahren gemäß Anspruch 7, wobei die eine oder mehrere physikalische Eigenschaft(en) des Kraftstoffs eines oder mehrere aus Kraftstoffdampfdruck, Dichte und Kraftstoffviskosität aufweist/aufweisen.
EP07858098A 2006-12-22 2007-12-21 Brennstoffeinspritzvorrichtung für einen verbrennungsmotor Not-in-force EP2097636B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07858098A EP2097636B1 (de) 2006-12-22 2007-12-21 Brennstoffeinspritzvorrichtung für einen verbrennungsmotor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0625770.3A GB0625770D0 (en) 2006-12-22 2006-12-22 Fuel injector for an internal combustion engine
EP07250160 2007-01-16
EP07858098A EP2097636B1 (de) 2006-12-22 2007-12-21 Brennstoffeinspritzvorrichtung für einen verbrennungsmotor
PCT/EP2007/064487 WO2008077953A1 (en) 2006-12-22 2007-12-21 Fuel injector for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP2097636A1 EP2097636A1 (de) 2009-09-09
EP2097636B1 true EP2097636B1 (de) 2012-02-15

Family

ID=39301278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07858098A Not-in-force EP2097636B1 (de) 2006-12-22 2007-12-21 Brennstoffeinspritzvorrichtung für einen verbrennungsmotor

Country Status (5)

Country Link
EP (1) EP2097636B1 (de)
JP (1) JP2010521605A (de)
KR (1) KR20090090400A (de)
AT (1) ATE545780T1 (de)
WO (1) WO2008077953A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825998A1 (de) * 1978-06-14 1980-01-03 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE3914636A1 (de) * 1989-05-03 1990-11-08 Bosch Gmbh Robert Vorrichtung zum kombinierten ausblasen von kraftstoff und luft fuer kraftstoffeinspritzanlagen von brennkraftmaschinen
GB9008403D0 (en) * 1990-04-12 1990-06-13 Lucas Ind Plc Fuel injection nozzle
DE19623713B4 (de) 1996-06-14 2008-06-19 Robert Bosch Gmbh Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
JP2006307678A (ja) * 2005-04-26 2006-11-09 Denso Corp 燃料噴射ノズル

Also Published As

Publication number Publication date
ATE545780T1 (de) 2012-03-15
JP2010521605A (ja) 2010-06-24
EP2097636A1 (de) 2009-09-09
WO2008077953A1 (en) 2008-07-03
KR20090090400A (ko) 2009-08-25

Similar Documents

Publication Publication Date Title
US7086614B2 (en) Fuel injector
US7156368B2 (en) Solenoid actuated flow controller valve
EP2535552B1 (de) Ventilanordnung für ein Einspritzventil und Einspritzventil
WO2001075296A1 (en) Closed nozzle fuel injector with improved controllability
US8919372B2 (en) Valve assembly for an injection valve and injection valve
EP1604104B1 (de) Steuerventilanordnung
US20100012753A1 (en) Fuel injector for an internal combustion engine
EP1136692B1 (de) Brennstoffeinspritzventil mit einem Steuerstab, gesteuert durch den Brennstoffdruck in einem Steuerraum
EP2097636B1 (de) Brennstoffeinspritzvorrichtung für einen verbrennungsmotor
JP2009030563A (ja) インジェクタ
US9297343B2 (en) Needle for needle valve
US20030019465A1 (en) Fuel injection valve
EP3156638B1 (de) Kraftstoffeinspritzventil
EP3004625B1 (de) Steuerventil für eine kraftstoffeinspritzdüse
US7243902B2 (en) Pressure-compensated, directly controlled valve
US6786433B2 (en) Fuel injection valve
GB2336628A (en) A fuel injector, for an I.C. engine, having a three way two position needle control valve
KR20040067854A (ko) 내연기관용 연료분사장치
US20020134852A1 (en) Fuel injection valve
AU2005287878B2 (en) Gas injector
EP1805410A1 (de) Gaseinspritzventil
JP3303565B2 (ja) 燃料噴射装置
CN112352096B (zh) 燃料喷射器
CN108291508B (zh) 燃料喷射器
CN107002611B (zh) 燃料喷射器

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20090722

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CORBINELLI, GIOVANNI

Inventor name: HOFFMANN, GUY

Inventor name: ROBART, DIDIER

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20100805

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 545780

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120315

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007020758

Country of ref document: DE

Effective date: 20120412

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20120215

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20120215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120615

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120615

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120516

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 545780

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20121116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007020758

Country of ref document: DE

Effective date: 20121116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120526

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121231

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120515

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20121221

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130830

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121221

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130102

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121221

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131230

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071221

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602007020758

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150701