EP3449114B1 - Kraftstoffinjektor - Google Patents

Kraftstoffinjektor Download PDF

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Publication number
EP3449114B1
EP3449114B1 EP17721087.9A EP17721087A EP3449114B1 EP 3449114 B1 EP3449114 B1 EP 3449114B1 EP 17721087 A EP17721087 A EP 17721087A EP 3449114 B1 EP3449114 B1 EP 3449114B1
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EP
European Patent Office
Prior art keywords
needle
contact
control chamber
fuel injector
injector according
Prior art date
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Active
Application number
EP17721087.9A
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English (en)
French (fr)
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EP3449114A1 (de
Inventor
Fabrizio Bonfigli
Aurélie JARRIGE
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.)
Borgwarner US Technologies LLC
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Delphi Technologies IP Ltd
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Publication of EP3449114A1 publication Critical patent/EP3449114A1/de
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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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/245—Position sensors, e.g. Hall sensors

Definitions

  • the present invention generally relates to the field of fuel injectors and more precisely to an injector equipped with a device for detecting the position of the needle.
  • a fuel injector conventionally comprises a needle controlled in opening and closing as a function of the pressure prevailing in a control chamber, which pressure is a function of the position of a control solenoid valve. These small movements are carried out at high speed and the regularly increased performance now requires, for optimal control, feedback as to the actual position of the needle.
  • the injector comprises resistive surface coatings arranged on a plurality of part contact surfaces, and wherein the overall electrical resistivity of the injector between the body of the solenoid actuator and the body of the injector varies by at least three distinct ohmic values intermittently depending on the kinetics of the injection needle of the injector.
  • the object of the present invention is to provide a fuel injector with another opening detection device having good reliability.
  • the present invention provides a fuel injector for an internal combustion engine, comprising an injection nozzle with a body in which is arranged a needle movable between a closed position (PF), in which a first end of the needle rests on a seat and closes the injection ports of the nozzle, and a fully open position, in which the first end of the needle is lifted from its seat and allows injection.
  • a control chamber is filled, in operation, with fuel so as to exert pressure on the second end of the needle.
  • a control valve associated with the control chamber, makes it possible to selectively vary the fuel pressure in the control chamber and thus control an opening or closing movement of the needle, the control valve being driven by a actuator.
  • the injector comprises a device for detecting the position of the needle including an elastic contact element able to follow the movement of the needle so as to take two positions in which it closes a detection circuit, said two positions corresponding respectively to the closed (PF) and fully open (PO) positions of the needle.
  • the contactor element comprises a base part mounted fixed and electrically insulated, and a flexible contact part which extends into the chamber and is at a predetermined electric potential, the contact part being supported on the end portion of the needle, while being electrically isolated from it.
  • the contact element closes the detection circuit by contacting the contact part with a first point of contact in the peripheral region of the control chamber, for example a part of the wall of the control chamber. bedroom ; and in the open position of the needle (PO), the contact element closes the detection circuit by contacting the contact part with a second contact point in the region of the ceiling of the control chamber.
  • the precision of the detection can be improved by calibrating at different pressure levels, in order to determine the moment when the injector actually opens in relation to the electrical signal for opening the needle (start of spraying). .
  • the base part of the contactor element is a substantially flat metal part of constant thickness, taken between the underside of the control valve body and a top guide element ensuring the guidance of the second end. needle.
  • This geometry of the base part facilitates its integration into the injector.
  • the flexible contact portion extends, at PF, out of the plane of the base portion, and is preformed to rest against the needle head end. The elasticity of the contact part makes it possible to follow the needle without permanent deformation (plastic), while ensuring the return to the initial shape corresponding to the PF.
  • Insulation of the contactor element can be achieved by means of electrical insulating layers provided at the interface between the base part of the conductive element and the control valve, as well as at the interface between the base part of the conductive element and the top guide element.
  • the contact portion of the contacting element is also preferably insulated from the needle head, for example by an electrically insulating layer disposed on the end face of the needle head.
  • the second needle end ends with a terminal portion of reduced section, which carries the insulating layer.
  • the contact part of the contactor element can take the form of an elastic metal strip, preconfigured to be, in the closed position PF of the needle, in contact with the needle head and with the first point of contact, the contact part tending to spontaneously resume this position.
  • the contactor element can take various forms. In general, the contact part and the base part are in one piece, in the same material. In particular, the contactor element can easily be manufactured with the desired shapes / contours from sheets or metal coils by any suitable method, for example cutting, pressing and / or deformation.
  • the top guide element is assembled in the nozzle inlet portion and the needle is preloaded in the closed position (PF) by means of a spring mounted outside the control chamber, around the needle, and resting on the one hand on the top guide element and on the other hand on a radial projection of the needle.
  • the top guide member typically includes a guide bore for the needle, partially defining the control chamber and an annular end face facing the control valve.
  • the contact part of the contactor element therefore has a configuration turned towards the closing direction of the needle, and the contact zone is positioned to be in contact with the contactor element.
  • the contact area is provided in the peripheral region of the control chamber (i.e. around the periphery).
  • This contact zone can for example be formed by a part of the wall of the control chamber (typically the wall of the top guide defining the chamber), or can be a protuberance or an insert placed flush, or slightly in retraction or forward, relative to the outline of the wall delimiting the control chamber.
  • the figure 1 illustrates an embodiment of the invention relating to a fuel injector 10, here a diesel injector, although the invention can be fully transposed to an injector for gasoline or any other fuel, the injector 10 generally forming part an injection system comprising several injectors.
  • a fuel injector 10 here a diesel injector
  • the injector 10 generally forming part an injection system comprising several injectors.
  • the description will detail the elements of the invention and will remain more succinct and general as regards the surrounding elements.
  • the injector 10 extends along a main axis A and comprises, from bottom to top, in the conventional and non-limiting sense of the figures: a nozzle 12 comprising a needle 14 arranged in a nozzle body 16; a control valve with a valve body 22 (also commonly called valve body) in which is arranged a fuel passage with seat and a closure member; and an actuator comprising an actuator body 26 accommodating a fixed coil and a movable magnetic armature.
  • the control valve and the actuator may be of the conventional type and are therefore not shown or described in detail.
  • the nozzle body 16, valve body 22 and actuator body 26 are held integral with one another by any suitable means.
  • the nozzle body 16 includes a stepped internal axial bore, extending from an upper end, where it has a large diameter, to a lower end that tapers off to form a tapered nozzle body seat 32. making it possible to control the access of the fuel to the injection orifices 34 extending through the conical wall of the nozzle body 16.
  • the needle comprises a projecting annular section 38 improving the guidance of the needle in the bore 30.
  • the fuel passes through this level, for example, through one or more grooves 39, straight or helical in the annular projection 38.
  • the guide of the needle in the upper part is obtained by an independent part 40, called the upper guide element, arranged between the nozzle body 16 and the valve body 22 and held fixed by the assembly of the parts of the injector, in particular by the compression exerted by the injector nut.
  • the top guide element is in the inlet section of the nozzle, against a shoulder 16 1 allowing its centering and axial locking.
  • the top guide element 40 guides in the axial direction A the top portion of the needle 14, called the needle head 42, through a central guide bore 44.
  • the needle head 42 in combination with the valve body 22 and the guide bore 44 define a control chamber 46 (also called a control chamber).
  • top and bottom are used here not only with reference to the orientation of the figure, but also with reference to the usual name given to these elements by professionals.
  • the needle 14 is generally cylindrical and extends axially A between the needle head 42, at the top of the figure, and a pointed end 48, at the bottom of the figure, forming a needle seat 50 cooperating with the seat body 32 nozzle body 16.
  • the needle 14 is provided with an annular protuberance 52, the upper face 54 of which, directed towards the needle head 42, provides a bearing surface for a spring 56 urging the needle 14 towards its position.
  • closed PF in which the needle tip 48 rests on its seat 32 and closes the injection orifices 34.
  • the spring 56 is arranged under the top guide 40 and it is compressed against a lower annular surface 58 of the top guide.
  • the injector 10 is more conventionally provided with a fuel circulation circuit which, on the one hand, allows the supply of high pressure fuel via a high pressure circuit, from an inlet mouth to the orifices of injection 34; and, on the other hand, the recirculation of fuel to a low pressure tank via an internal low pressure circuit.
  • the high pressure circuit comprises in particular a bypass channel leading to the control chamber 46, from which the low pressure circuit leaves again via an evacuation channel controlled in opening and closing by the control valve.
  • the actuator typically an electromagnet
  • the actuator typically an electromagnet
  • the pressure in the control chamber 46 then drops, and the needle 14 moves into the bore of the nozzle body to a fully open position PO in which the needle seat 50 is moved away from the nozzle body seat 32, so as to allow fuel injection through the injection holes 34, the top of the head d the needle 42 being in upper stop, stopped by the lower face 59 of the valve body 22, also called the ice face 59.
  • the magnetic armature and valve shutter assembly When the actuator is not powered, the magnetic armature and valve shutter assembly is pushed back by a valve spring to a position in which the discharge channel is closed, which retains in the control chamber 46 the high pressure fuel that gets there. The pressure in the control chamber 46 then rises and the needle 14, pushed back by the spring 56 and by the pressure in the control chamber 46, moves to the closed position PF in which the needle seat 50 is in position. sealed contact against the nozzle body seat 32, so as to prevent fuel injection and in which the top of the needle head 42 is remote from the ceiling face 59 of the control chamber 46.
  • the injector is equipped with a needle position detection device.
  • the device for detecting the position of the needle comprises a detection circuit with a switch function actuated by the upper part 42 of the needle.
  • the detection device comprises a resilient contactor element 62 capable of accompanying the movement of the needle and of taking two positions in which the detection circuit is closed, corresponding to the closed positions PF and fully open of the needle PO.
  • the contactor element includes a fixed mounted and electrically insulated base portion 64, and a contact portion 66 which extends into the control chamber 46.
  • the contact portion 66 rests on the end portion of the. needle, while being electrically isolated therefrom.
  • the contactor element 62 can be made from a metal part, the interior of which is cut out (see Fig. 6 ), for example a metal washer, part of which is cut (open washer).
  • the contactor element 62 is mounted electrically insulated between the glass face 59 (lower face) of the valve body 22 and the upper annular face 41 of the top guide element 40, which are facing each other.
  • the washer is positioned so that the greater part of its body, called the base part 64, is centered with respect to the control chamber 46.
  • the base part is fixed by its periphery by compression; a peripheral annular band of the body 64 is taken between the top guide 40 and the valve body 22.
  • the base part 64 is isolated from the top guide 40 and the valve body 22 by electrically insulating layers 68, which can be made in any suitable material. A portion of the body forms the contact portion 66, in the manner of an elastic strip, and extends into the control chamber 46 to serve as a switch member cooperating with the needle head 42.
  • a metal washer for forming the conductive element 62 constitutes an intrinsically elastic and electrically conductive element, the substantially planar shape of which and of constant thickness facilitates assembly.
  • the body 64 forming the base part is generally planar and only the contact part 66 exits the plane of the washer 64 to come into contact with the needle head in the free / unconstrained configuration of the conductive element 62.
  • the body 64 has the general shape of a round piece (disc).
  • the body 64 is cut out so as to form a tongue, constituting the contact part 66.
  • the contact part 66 is connected to the body 64 on the inside of the peripheral edge of the body 64. It extends substantially radially and therefore has its free end located close to the center of the body 64.
  • the cutout of the tongue 66 is typically made in the mass. A portion of material is removed around the tongue 64 so as to maintain a space 65 between the contact portion 66 and the rest of the body 64, so that the tongue 66 can move in the chamber, under the action of the head of 'needle, without interfering with the base part 64.
  • the tongue 66 is plastically deformed so that, in its rest (free) position, it protrudes from one side of the body 64, in order to be able to assume the position illustrated in figure 1 , and behaves like a spring tongue taking up this configuration when it is not constrained upwards by the needle.
  • the electrical contactor element 62 is brought to a predetermined electrical potential via an electrical contact terminal 70 (also called a “key”) positioned laterally and passing through the valve body in an electrically isolated manner.
  • an electrical contact terminal 70 also called a “key”
  • a hole is made in the control valve 22 and an insulated wire is passed through it, the end of which, possibly provided with a terminal, comes to rest on the base part 64.
  • the entire contactor element 62 is brought to an electric potential, but the contactor element is isolated, by means of insulating layers 68, from the elements which surround it and participate in its fixing. Further, the contact portion 66 is isolated from the needle 14 by means of an insulating layer 72 positioned on the end face of the needle head 42.
  • the insulating layers 68 can each have an annular shape.
  • a hole 69 is provided in the insulating layer 68 located on the upper face of the contact element 62, for electrical contact with the key 70.
  • the contactor element 62 thus plays the role of a switch in a detection circuit comprising: the electrical connection fixing the contactor element to the desired potential (via a wire and the terminal 70), the contactor element. itself, the valve body 22, the top guide 40, and the nozzle body, respectively the injector body.
  • these injector components are typically made of metal, e.g. made of steel, and therefore conduct current.
  • the detection circuit is open, whether in the opening or closing movement of the needle.
  • the needle 14 In the fully open position PO, the needle 14 is at the top stop, stopped by the glass face 59 of the valve body 22.
  • the tongue 66 is elastically deformed. upwards to find itself, at the upper stop of the needle, between the latter and the glass face 59. This is the configuration illustrated on figure 5 .
  • the contactor element 66 In this position the contactor element 66 is therefore in electrical contact with the valve body 22, forming the second point of contact, itself connected to ground, generally through the nozzle body 16: the detection circuit is therefore closed in this position of the tab 66.
  • the transition of the electrical signal indicates the moment of the closing of the detection circuit, and therefore of the complete opening of the needle.
  • the contact portion 66 being an elastic strip, it will tend to resume its initial shape from the figure 1 , and illustrated on figure 6 , when needle 14 goes down to PF.
  • the contact part 66 is therefore in this sense comparable to a spring, which returns to its initial shape when it is not loaded.
  • the contactor element 62, and particularly the contact portion 66 spontaneously returns to its initial shape from the figure 1 when the needle is at PF, automatically establishing electrical contact with the first point of contact.
  • the example described above uses a metal washer to produce the contactor element 62.
  • This is only one example and the person skilled in the art can use any suitable means to manufacture this contactor element.
  • we will use a part / washer in metallic material, typically steel.
  • a spring steel which thus intrinsically has good electrical conductivity and the capacity to deform elastically.
  • a washer instead of starting from a washer, one can start from a rectangular part or the like, a part of which will form the base part, for example a peripheral part, and in which the contact part will be cut. There will be a cutout in this rectangular part so that the tongue part can move in the control chamber without colliding laterally with the base part.
  • the needle head comprises an end section of reduced diameter. This forms a point which improves precision when touching the tongue 66 against the face of the glass 59.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (9)

  1. Kraftstoffinjektor für einen Verbrennungsmotor, enthaltend:
    eine Einspritzdüse (12) mit einem Körper (16), in dem eine Nadel (14) angeordnet ist, die zwischen einer geschlossenen Position (PF), in der ein erstes Ende (48) der Nadel auf einem Sitz (32) aufliegt und Einspritzöffnungen (34) der Düse verschließt, und einer vollständig geöffneten Position (PO), in der das erste Ende der Nadel von ihrem Sitz (32) abgehoben ist und die Einspritzung ermöglicht, verstellbar ist;
    eine Steuerkammer (46), die im Betrieb mit Kraftstoff gefüllt ist, um Druck auf das zweite Ende (42) der Nadel auszuüben;
    ein Steuerventil, das der Steuerkammer (46) zugeordnet ist, um den Kraftstoffdruck in der Steuerkammer (46) selektiv zu variieren und dadurch eine Öffnungs- bzw. Schließbewegung der Nadel (14) zu steuern, wobei das Steuerventil von einem Stellglied angetrieben wird;
    eine Vorrichtung zum Erfassen der Position der Nadel;
    wobei die Vorrichtung zum Erfassen der Position der Nadel ein elastisches Kontaktelement (62) enthält, das sich in der Steuerkammer erstreckt und in der Lage ist, der Bewegung der Nadel zu folgen, um zwei Positionen einzunehmen, in denen es einen Erfassungsstromkreis schließt, wobei die beiden Positionen jeweils der geschlossenen Position (PF) bzw. der vollständig geöffneten Position (PO) der Nadel entsprechen, dadurch gekennzeichnet, dass
    das Kontaktelement (62) einen fest montierten und elektrisch isolierten Basisabschnitt (64) und einen elastisch flexiblen Kontaktabschnitt (66) aufweist, der sich in die Steuerkammer erstreckt und auf einem vorbestimmten elektrischen Potential liegt, wobei der Kontaktabschnitt (66) am Endabschnitt der Nadel anliegt und dabei elektrisch davon isoliert ist;
    in der geschlossenen Position (PF) der Nadel das Kontaktelement (62) den Erfassungsstromkreis durch Kontakt des Kontaktabschnitts (66) mit einem ersten Kontaktpunkt (74) im Umfangsbereich der Steuerkammer (46) schließt; und
    in der offenen Position (PO) der Nadel das Kontaktelement (62) den Erfassungsstromkreis durch Kontakt des Kontaktabschnitts (66) mit einem zweiten Kontaktpunkt im Bereich der Decke (59) der Steuerkammer (46) schließt.
  2. Kraftstoffinjektor nach Anspruch 1,
    dadurch gekennzeichnet, dass
    der Basisabschnitt (64) des Kontaktelements (62) ein im Wesentlichen flaches Metallteil konstanter Dicke ist, das zwischen der Unterseite (59) des Steuerventilkörpers und einem oberen Führungselement (40), das die Führung des zweiten Nadelendes sicherstellt, aufgenommen ist;
    der Kontaktabschnitt (66) in Position PF aus der Ebene des Basisabschnitts herausragt und zur Anlage an das zweite Nadelende (44) vorgeformt ist.
  3. Kraftstoffinjektor nach Anspruch 2,
    dadurch gekennzeichnet, dass
    die Isolierung des Kontaktelements (62) mittels elektrisch isolierender Schichten (68) hergestellt ist, die an der Schnittstelle zwischen dem Basisabschnitt des leitenden Elements und dem Steuerventil sowie an der Schnittstelle zwischen dem Basisabschnitt des leitenden Elements und dem oberen Führungselement vorgesehen sind.
  4. Kraftstoffinjektor nach Anspruch 1, 2 oder 3,
    dadurch gekennzeichnet, dass
    der Kontaktabschnitt (66) des Kontaktelements von dem Nadelkopf isoliert ist, insbesondere durch eine an der Endfläche des Nadelkopfes angeordnete elektrisch isolierende Schicht (72).
  5. Kraftstoffinjektor nach Anspruch 4,
    dadurch gekennzeichnet, dass
    das zweite Nadelende (42) in einem Endabschnitt mit reduziertem Querschnitt endet, der die isolierende Schicht (72) trägt.
  6. Kraftstoffinjektor nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass
    der Kontaktabschnitt (66) des Kontaktelements eine elastische Metalllamelle ist, die so vorkonfiguriert ist, dass sie in der geschlossenen Position der Nadel in Kontakt mit dem Nadelkopf und mit dem ersten Kontaktpunkt steht, wobei der Kontaktabschnitt dazu neigt, diese Position spontan wieder einzunehmen.
  7. Kraftstoffinjektor nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, dass
    das obere Führungselement (40) im Einlassabschnitt des Düsenkörpers (16) montiert ist und die Nadel (14) mittels einer Feder (56), die außerhalb der Steuerkammer (46) um die Nadel herum gelagert ist und sich einerseits am oberen Führungselement (40) und andererseits an einem radialen Vorsprung der Nadel (52) abstützt, in die geschlossene Position vorgespannt ist.
  8. Kraftstoffinjektor nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass
    das obere Führungselement (40) eine Führungsbohrung (44) für die Nadel (14), die teilweise die Steuerkammer (46) definiert, und eine dem Steuerventil zugewandte ringförmige Endfläche (41) aufweist;
    und dass der Kontaktabschnitt (66) in der geschlossenen Position (PF) den ersten Kontaktpunkt, der von dem oberen Innenrand (74) des oberen Führungselements (40) gebildet wird, an der Verbindung zwischen Führungsborhung (44) und Vorderseite (41) berührt.
  9. Kraftstoffinjektor nach einem der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass
    die Erfassungsvorrichtung so ausgelegt ist, dass das Kontaktelement (62) den Erfassungsstromkreis nur in der offenen Position (PO) oder geschlossenen Position (PF) der Nadel (14) schließt, wobei der Erfassungsstromkreis somit in den anderen Positionen des Kontaktelements (62) offen ist.
EP17721087.9A 2016-04-29 2017-04-26 Kraftstoffinjektor Active EP3449114B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1653921A FR3050771B1 (fr) 2016-04-29 2016-04-29 Injecteur de carburant
PCT/EP2017/059991 WO2017186819A1 (fr) 2016-04-29 2017-04-26 Injecteur de carburant

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Publication Number Publication Date
EP3449114A1 EP3449114A1 (de) 2019-03-06
EP3449114B1 true EP3449114B1 (de) 2020-12-16

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EP (1) EP3449114B1 (de)
FR (1) FR3050771B1 (de)
WO (1) WO2017186819A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075887A1 (fr) * 2017-12-21 2019-06-28 Delphi Technologies Ip Limited Injecteur de carburant
IT201900006428A1 (it) * 2019-04-29 2020-10-29 Omt Digital S R L Procedimento per il monitoraggio di un iniettore common-rail per grandi motori diesel e dual-fuel e iniettore configurato per implementare tale procedimento

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP3368763A1 (de) * 2015-10-29 2018-09-05 Delphi Technologies IP Limited Kraftstoffeinspritzer

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JP2760072B2 (ja) * 1989-07-31 1998-05-28 株式会社デンソー 燃料噴射ノズルのニードルリフトセンサ
GB2340610A (en) * 1998-08-18 2000-02-23 Lucas Ind Plc Needle lift sensor
DE10338489B3 (de) * 2003-08-21 2004-12-16 Siemens Ag Einspritzventil mit kapazitivem Ventilhubsensor
DE102005049259B3 (de) * 2005-10-14 2007-01-04 Siemens Ag Ventilvorrichtung
DE102010044012A1 (de) * 2010-11-16 2012-05-16 Robert Bosch Gmbh Kraftstoffinjektor
DE102012202538A1 (de) * 2012-02-20 2013-08-22 Robert Bosch Gmbh Kraftstoffinjektor
FR3013080A1 (fr) 2013-11-12 2015-05-15 Delphi Technologies Holding Injecteur de carburant
FR3024183B1 (fr) * 2014-07-22 2019-07-26 Delphi Technologies Ip Limited Injecteur de carburant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3368763A1 (de) * 2015-10-29 2018-09-05 Delphi Technologies IP Limited Kraftstoffeinspritzer

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Publication number Publication date
FR3050771B1 (fr) 2018-06-01
FR3050771A1 (fr) 2017-11-03
WO2017186819A1 (fr) 2017-11-02
EP3449114A1 (de) 2019-03-06

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