EP3449115B1 - Kraftstoffeinspritzer - Google Patents

Kraftstoffeinspritzer Download PDF

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Publication number
EP3449115B1
EP3449115B1 EP17718943.8A EP17718943A EP3449115B1 EP 3449115 B1 EP3449115 B1 EP 3449115B1 EP 17718943 A EP17718943 A EP 17718943A EP 3449115 B1 EP3449115 B1 EP 3449115B1
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EP
European Patent Office
Prior art keywords
needle
face
faces
guiding means
male
Prior art date
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Active
Application number
EP17718943.8A
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English (en)
French (fr)
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EP3449115A1 (de
Inventor
Jean-François Berlemont
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 Luxembourg Automotive Systems SA
Original Assignee
Delphi Automotive Systems Luxembourg SA
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Publication of EP3449115A1 publication Critical patent/EP3449115A1/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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • 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 relates to a fuel injector and more particularly to a nozzle assembly provided with a contact-less electrical switch enabling determination of a valve member location.
  • a needle shape valve member reciprocally commutes in a nozzle body between a fully closed position where sloped seating faces are in contact and, a fully open position where said sloped seating faces are lifted away from each other.
  • Said switch means comprise electrical insulation of the valve member relative to the nozzle body, especially of the valve guiding faces that slide against faces of the body, the sloped seating faces remaining uncoated to enable closing of the switch when they are in contact, the closed position meaning that fuel injection is prevented, and open of the switch as soon as the needle lifts and the seating faces split, the open position meaning that fuel injection occurs.
  • the nozzle assembly comprises a nozzle body provided with a bore extending along a main axis and a valve member having an elongated needle shape extending from a head extremity to a pointy extremity.
  • the needle is slidably guided in said bore between lower and upper guiding means wherein in use, fuel pressure variations in a control chamber, wherein protrudes the head extremity of the needle, force the needle to reciprocal displacements in the bore between a fully closed position forbidding injection via spray holes, where a male seating face provided at the pointy extremity of the needle abuts in sealing contact against a complementary female seating face of the nozzle body and, a fully open position enabling said injection events, said male and female seating faces being away from each other.
  • the lower guiding means is arranged in the vicinity of the seating faces and, the upper guiding means is arranged in the vicinity of the control chamber, said guiding means comprising the sliding fit of male needle faces with female body faces.
  • the nozzle assembly is further provided with a contact-less switch means adapted to commute between an open state and a closed state in order to enable electrical detection of the position of the needle.
  • said switch means comprises electrical insulation of the needle relative to the nozzle body, said insulation being provided by insulation coating covering at least one of the male needle faces or female body faces of each guiding means and, at least one of the seating faces, to the exception of a needle uncoated zone and of a bore uncoated zone, the electrical circuit being in a closed state only when said uncoated zones are facing each other without contact.
  • the uncoated zones are arranged so that the switch means commutes around a needle position where the seating faces are away from each other by a predetermined gap.
  • the switch means is in closed state when the distance between the seating faces is smaller than said predetermined gap, and wherein the switch means commutes to the open state when the distance between the seating faces is superior to said predetermined gap.
  • said predetermined gap is approximately 10 ⁇ m and preferably 5 ⁇ m.
  • the uncoated zones are preferably arranged on the sliding faces of the lower guiding means.
  • the needle has an elongated thin core narrower than its male face of the lower guiding means and, the body has a larger section than the female face of the lower guiding means.
  • said needle male face of the lower guiding means axially extends from an upper edge to a lower edge, a needle shoulder face joining said upper edge to the thin core and, said body female face of the lower guiding means axially extends from an upper edge to a lower edge, a body shoulder face joining said upper edge to said larger section of the bore.
  • the uncoated zones extend on said male and female faces of the lower guiding means.
  • the upper edges of the needle and of the body are sharp edges.
  • the upper edge of the needle male face is substantially aligned to the upper edge of the body female face.
  • the needle uncoated zone extends from said upper edge of the needle male face. Also, the needle uncoated zone further extends on the peripheral area of the needle shoulder face.
  • the insulation coating only covers the needle male face of the lower guiding means, the body female face being uncoated.
  • the uncoated zone of the needle faces the uncoated body female face of the lower guiding means.
  • the invention further extends to a fuel injector comprising a nozzle assembly as described above.
  • FIG. 1 In reference to figure 1 is represented an section of a diesel fuel injector 10 along a main axis X.
  • the injector 10 is provided with a nozzle assembly 12 comprising a nozzle body 14 in which is slidably arranged a needle-like valve member 16.
  • the nozzle body 14 has a wall 18 defining an inner bore 20 which, from top to bottom of figure 2 , comprises a cylindrical upper face 22 of diameter D22 ending on a shoulder face 24 which extends and narrows the section of the bore toward a circular sharp upper edge 25 joining an axial cylindrical guiding face 26 of smaller diameter D26 than the upper face 22.
  • the shoulder face 24 can be planar and transverse or alternatively slightly sloped as represented.
  • the guiding face 26 downwardly extends from said sharp upper edge 25 to a bottom tip end 28 of the nozzle body where the inner face of the wall defines a female sloped seating face 30 which smallest section opens in a sac 32 wherefrom depart spray holes 34 extending through said tip end of the wall.
  • the guiding face 26 could extend from the upper edge 25 down to a lower edge 35, not represented, wherefrom the bore section could enlarge again.
  • the needle-like valve member 16 is complementary arranged in the bore 20 and it has an elongated body extending from a head end 36, protruding in a control chamber 38, a thin core 40 of diameter D40 downwardly extending from said head 36 toward a needle sloped shoulder face 42, that alternatively to the sloped representation, could be planar and transverse, and which enlarges the section of the needle from said thin diameter D40 toward a peripheral circular upper edge 44 wherefrom downwardly extends a cylindrical male guiding face 46 of diameter D46, said male guiding face 46 axially extending from said upper edge 44 to a sharp lower edge 48 wherefrom the needle narrows again in one or several portions as represented.
  • the ultimate ending portion forms a male sloped seating face 50.
  • the cylindrical male guiding face 46 is provided with three flats 52 enabling in use fuel flow toward the spray holes 34.
  • the flats 52 limit the male guiding face 46 to three circular 46a, 46b, 46c, portions better visible on the transverse section of figure 3 .
  • the male guiding face could be provided with only one flat or two or four or any other number of flats.
  • the three portions 46a, 46b, 46c, of the male guiding face 46 of the needle cooperates with the female guiding face 26 of the bore, thus forming lower guiding means 54, the nozzle assembly 12 also comprising upper guiding means 56 arranged between the head end 36 and the control chamber 38.
  • a command unit (ECU) 58 controls fuel flow in the injector 10 and, upon fuel pressure variations occurring in the control chamber 38 and imparting forces on the needle 16, the needle 16 reciprocally translates in the bore guided by the upper guiding means 56 and the lower guiding means 54, between a fully closed position CP where the male seating face 50 abuts in sealing contact against the female seating face 30, thus preventing fuel injection through the spray holes 34 and, a fully open position OP where said seating faces 30, 50 are distant from each other, enabling fuel injection event.
  • This indirect control of the needle motion is typical of diesel fuel injector wherein the fuel pressure reaches 2000 bars or more.
  • an electro-magnetic actuator operates a control valve which in turn controls the inner pressure of the control chamber enabling hydraulic control of the needle motions.
  • the injector is further provided with switch means 59 that commute in a closed position CS when the needle is in closed position CP and that opens OS when the needle has left the closed position.
  • the switch means 59 is arranged within an electrical circuit 60 comprising the metallic core of the needle, the metallic nozzle body and also, coating of the needle 16 with an electrically insulating material 61 on said faces which cooperate in close contact with faces of the bore, to the exception of an uncoated zone 62 where the metal of the needle is exposed.
  • the needle 16 is coated on its circular portion of the male guiding face 46a, 46b, 46c, and also on the sloped male seating face 50, the uncoated zone 62 extending over said coated faces.
  • Other faces than those of the lower guiding means 54 of the needle are coated, for instance in the area of the upper guiding means 56.
  • said zone could be coated with a conductive coating and, in this alternative what is identified in this description as the "uncoated zone" should be referred to a "conductive zone".
  • the bore faces are not coated and, in fully closed position CP of the uncoated zone 62 faces the upper edge 25 of the bore and the top part of the female guiding face 26 of the bore.
  • the faces of the lower guiding means 54 slide against each other and the metallic part of it remain at a distance from each other equal to the thickness T61 of the coating.
  • insulation coating 61 is to have low conductivity versus gap (62) conductivity, and resistance to wear, in order to avoid degradation of the insulation over time and high resistance to wear.
  • Gap conductivity qualifies the electrical conductivity of an exposed zone, uncoated, which is typically filled with fuel. The coating is expected to prevent flow of electrical current relative to this uncoated case.
  • the uncoated zone 62 operates as a contact-less switch 64 now detailed in reference to the figures 5, 6 and 7 .
  • the needle is open, either in fully open position OP or in ballistic mode between said extreme closed and open positions, the uncoated zone 62 does not face any face of the bore, the switch 59 is in open state OS and no signal S is received by the ECU 58 which interprets this as an open position of the needle, enabling fuel injection through the spray holes 34.
  • the needle has downwardly travelled and the uncoated zone 62 has moved to face the upper edge 25 of the bore.
  • Electrical field in the electrical circuit 60 has concentrated around the sharps edges 25, 44, of the bore and of the needle and, even in absence of physical contact, the seating faces 30, 50, still being distant from each other, the switch 59 closes CS and current flows between the needle and the bore as it is sketched by the arrows A.
  • the closing of the switch 59 occurs before the needle reaches the fully closed position CP, when a predetermined gap G remains between the seating faces 30, 50. This gap G is too narrow and not sufficient to enable fuel passage between the seating faces and consequently fuel injection.
  • the ECU advantageously interprets the early closing of the switch 59 as a signal that fuel injection has ended.
  • the switch 59 When the needle opens, travelling in the reverse direction from the figures 7 to figure 5 , the switch 59 remains closed CS during a short period after the needle has started to lift and, the switch commutes in open position once the sharp edges 25, 44, are distant enough so the electrical current can no longer pass, or "flows", from one edge to the other, this distance corresponding to the lift of the needle where the gap G is between the seating faces 30, 50.
  • figure 8 being the case of a first embodiment where the uncoated zone 62 is a short uncoated zone, now referenced 62S, corresponding to a small gap G and, figure 9 being a second embodiment where the uncoated zone is an extended uncoated zone referenced 62E for a more important gap G.
  • the extended uncoated zone 62E is larger and axially extends on a wider area of the male guiding face 46 of the needle.
  • Figure 10 is a double plot representing the needle lift, on the top curve, in relation to the switch 59 position on the bottom curve.
  • the plots represent the needle position and switch state along the time one injection event.
  • the case of the short uncoated zone 62S and the case of the extended uncoated zone 62E are overlaid on the plot of figure 10 .
  • the nozzle assembly is provided with another switch means that closes when in fully open position of the needle.
  • the signal communicated to the ECU 58 commutes back to the closed position while the plot of the needle lift reaches a plateau indicating the fully open position OP of the needle.
  • the needle continues its downward move toward the fully closed position CP, closing the gap G and, the switch 59 remains closed CS.
  • the plot corresponding to the extended uncoated zone 62E is similar to the above description for the short zone as the behavior of the needle and of the switch as similar.
  • the predetermined gap is chosen to be larger and is now references GE.
  • the differences are that the second phase, now identified P2E, extends from time t1 to a time t2E occurring later than the time t2S because it takes a longer time for the needle to raise so the extended uncoated zone 62E is moved away from the bore face 26 of the lower guiding means.
  • the switch 59 closes CS at an earlier time t4E than the time t4S, simply because the needle in its closing displacement reaches earlier said predetermined gap GE and, the uncoated zone 62E faces earlier the bore face 26 of the lower guiding means.
  • a preferred location for the uncoated zone 62 is as previously described by the upper edges 44 of the lower guiding means 54.
  • Other location can be chosen to create a contact-less switch 59, such as the lower edge 48 of the same lower guiding means 54.
  • the female guiding face 26 needs to be ended into a lower shoulder face or an annular groove in order to create a sharp groove at the lower end of the female guiding face. Therefore, in fully closed position CP of the needle the uncoated zone 62 faces said annular groove beneath the female guiding face 26 of the bore and the switch means 59 is in open state OS. When the needle lifts up and reaches an altitude equal to the gap G, the uncoated zone 62 faces the female guiding face and the switch 59 closes.
  • closed state CS of the switch corresponds to open position OP of the needle and open state OS of the switch means closed position CP of the needle, at least a smaller gap than gap G and no fuel injection.
  • the switch means would require to reserve a needle uncoated zone and a bore uncoated zones, said two uncoated zones facing each other to commute the switch in closed state CS.
  • the contact-less switch means could be implemented in the vicinity of the upper guiding means, by the head end 36 of the needle.

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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)
  • Fuel-Injection Apparatus (AREA)

Claims (11)

  1. Düsenanordnung (12) eines Kraftstoffinjektors (10), der ausgebildet ist, in einer Kraftstoffeinspritzeinrichtung eines Verbrennungsmotors angeordnet zu sein, wobei die Düsenanordnung (12) einen Düsenkörper (14) aufweist, der mit einer Bohrung (20) versehen ist, die sich entlang einer Hauptachse (X) erstreckt, und einem Ventilelement (16) mit einer länglichen Nadelform, das sich von einem Kopfende (36) zu einem spitzen Ende erstreckt,
    wobei die Nadel (16) in der Bohrung (20) zwischen einer unteren (54) und einer oberen (56) Führungseinrichtung verschiebbar geführt wird, wobei in Betrieb Kraftstoffdruckschwankungen in einer Steuerkammer (38), in die das Kopfende (36) der Nadel vorspringt, die Nadel zu reziproken Versetzungen in der Bohrung (20) zwischen einer vollständig geschlossenen Position (CP), die ein Einspritzen über Sprühlöcher (34) verhindert, wobei eine männliche Sitzfläche (50), die an dem spitzen Ende der Nadel vorgesehen ist, in Dichtungskontakt an eine komplementäre weibliche Sitzfläche (30) des Düsenkörpers (14) anliegt, und einer vollständig geöffneten Position (OP) zwingen, die die Einspritzereignisse ermöglicht, wobei die männlichen und weiblichen Sitzflächen voneinander entfernt sind, und wobei
    die untere Führungseinrichtung (54) in der Nähe der Sitzflächen angeordnet ist und die obere Führungseinrichtung (56) in der Nähe der Steuerkammer (38) angeordnet ist, wobei die Führungseinrichtungen (54, 56) die Gleitpassung von männlichen Nadelflächen mit weiblichen Körperflächen aufweisen,
    dadurch gekennzeichnet, dass
    die Düsenanordnung (12) weiter mit einer kontaktlosen Schalteinrichtung (59) versehen ist, die ausgebildet ist, um zwischen einem offenen Zustand (OS) und einem geschlossenen Zustand (CS) zu wechseln, um eine elektrische Erfassung der Position der Nadel (16) zu ermöglichen, und wobei die Schalteinrichtung (59) eine elektrische Isolierung der Nadel relativ zu dem Düsenkörper (14) aufweist, wobei die Isolierung durch eine Isolationsbeschichtung (61) vorgesehen ist, die zumindest eine der männlichen Nadelflächen oder weiblichen Körperflächen jeder Führungseinrichtung und zumindest eine der Sitzflächen mit Ausnahme einer unbeschichteten Nadelzone (62) und einer unbeschichteten Bohrungszone bedeckt, so dass die elektrische Schaltung (60) nur in einen geschlossenen Zustand schaltet, wenn sich die unbeschichteten Zonen (62) ohne Kontakt gegenüberliegen, und
    wobei die unbeschichteten Zonen (62) derart angeordnet sind, dass die Schalteinrichtung (59) um eine Nadelposition schaltet, in der die Sitzflächen (30, 50) durch einen vorgegebenen Spalt (G) voneinander getrennt sind, und
    wobei die Schalteinrichtung (59) in einem geschlossenen Zustand (CS) ist, wenn der Abstand zwischen den Sitzflächen kleiner als der vorgegebene Spalt (G) ist, und wobei die Schalteinrichtung in den offenen Zustand (OS) schaltet, wenn der Abstand zwischen den Sitzflächen größer als der vorgegebene Spalt (G) ist.
  2. Düsenanordnung (12) gemäß Anspruch 1, wobei der vorgegebene Spalt (G) ungefähr 10 µm und vorzugsweise 5 µm beträgt.
  3. Düsenanordnung (12) gemäß einem der Ansprüche 1 bis 2, wobei die unbeschichteten Zonen (62) auf den Gleitflächen der unteren Führungseinrichtung (54) angeordnet sind.
  4. Düsenanordnung (12) gemäß Anspruch 3, wobei zwischen der oberen (56) und der unteren (54) Führungseinrichtung die Nadel einen länglichen dünnen Kern (40) hat, der schmaler als ihre männliche Fläche der unteren Führungseinrichtung ist, und der Körper einen größeren Querschnitt als die weibliche Fläche (26) der unteren Führungseinrichtung hat, und wobei
    sich die männliche Nadelfläche (46) der unteren Führungseinrichtung axial (X) von einer Oberkante zu einer Unterkante erstreckt, wobei eine Nadelschulterfläche (42) die Oberkante mit dem dünnen Kern (40) verbindet, und
    sich die weibliche Körperfläche der unteren Führungseinrichtung axial von einer Oberkante zu einer Unterkante erstreckt, wobei eine Körperschulterfläche (24) die Oberkante mit dem größeren Querschnitt der Bohrung (20) verbindet,
    sich die unbeschichteten Zonen (62) auf den männlichen und weiblichen Flächen der unteren Führungseinrichtung (54) erstrecken.
  5. Düsenanordnung (12) gemäß Anspruch 4, wobei die Oberkanten (25, 44) der Nadel und des Körpers scharfe Kanten sind.
  6. Düsenanordnung (12) gemäß einem der Ansprüche 4 oder 5, wobei in der vollständig geschlossenen Position (CP) der Nadel die Oberkante (44) der männlichen Nadelfläche im Wesentlichen mit der Oberkante (25) der weiblichen Körperfläche ausgerichtet ist.
  7. Düsenanordnung (12) gemäß einem der Ansprüche 4 bis 6, wobei sich die unbeschichtete Nadelzone (62) von der Oberkante (44) der männlichen Nadelfläche erstreckt.
  8. Düsenanordnung (12) gemäß Anspruch 7, wobei sich die unbeschichtete Nadelzone (62) weiter auf dem Umfangsbereich der Nadelschulterfläche (42) erstreckt.
  9. Düsenanordnung (12) gemäß einem der Ansprüche 1 bis 8, wobei mit Ausnahme der unbeschichteten Zone (62) die Isolationsbeschichtung (61) nur die männliche Nadelfläche der unteren Führungseinrichtung (54) bedeckt, wobei die weibliche Körperfläche unbeschichtet ist.
  10. Düsenanordnung (12) gemäß Anspruch 9, wobei in der vollständig geschlossenen Position (CP) der Nadel die unbeschichtete Zone (62) der Nadel der unbeschichteten weiblichen Körperfläche (26) der unteren Führungseinrichtung zugewandt ist.
  11. Kraftstoffinjektor (10) mit einer Düsenanordnung (12) gemäß einem der vorhergehenden Ansprüche.
EP17718943.8A 2016-04-27 2017-04-25 Kraftstoffeinspritzer Active EP3449115B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1607313.2A GB2549747A (en) 2016-04-27 2016-04-27 Fuel injector
PCT/EP2017/059746 WO2017186691A1 (en) 2016-04-27 2017-04-25 Fuel injector

Publications (2)

Publication Number Publication Date
EP3449115A1 EP3449115A1 (de) 2019-03-06
EP3449115B1 true EP3449115B1 (de) 2021-07-28

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EP17718943.8A Active EP3449115B1 (de) 2016-04-27 2017-04-25 Kraftstoffeinspritzer

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Country Link
EP (1) EP3449115B1 (de)
GB (1) GB2549747A (de)
WO (1) WO2017186691A1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016012242A1 (fr) * 2014-07-22 2016-01-28 Delphi International Operations Luxembourg S.À R.L. Injecteur de carburant

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Publication number Priority date Publication date Assignee Title
GB754917A (en) * 1953-11-04 1956-08-15 Daimler Benz Ag Apparatus for measuring the movement of valve needles, particularly for fuel injection nozzles of internal combustion engines
US4386522A (en) * 1981-07-20 1983-06-07 Wolff George D Position sensor for fuel injection apparatus
DE3343269C1 (de) * 1983-11-30 1985-04-04 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zum indirekten beruehrungslosen elektrischen Messen kleiner Wege
DE4105270A1 (de) * 1991-02-20 1992-08-27 Max Planck Gesellschaft Optisches weg- oder verformungsmessverfahren sowie optischer weg- oder verformungsmesser
DE4301978A1 (de) * 1993-01-26 1994-07-28 Andreas Koch Brennstoffeinspritzdüse mit einer Anordnung zur Messung des Verschiebeweges einer Düsennadel
DE4341102A1 (de) * 1993-12-02 1995-06-08 Bosch Gmbh Robert Kraftstoffeinspritzdüse mit Nadelstellungsfühler
DE19712374C2 (de) * 1997-03-25 2001-07-19 Bosch Gmbh Robert Lage- und Wegsensor
DE19743156C2 (de) * 1997-09-30 1999-08-12 Bosch Gmbh Robert Lage- oder Wegsensor
JPH11159422A (ja) * 1997-11-28 1999-06-15 Nippon Soken Inc 内燃機関用の燃料噴射弁
US6237572B1 (en) * 1998-12-22 2001-05-29 Caterpillar Inc. Apparatus and method for determining start of injection of a fuel injector
DE10026595A1 (de) * 2000-05-30 2002-02-14 Iav Gmbh Nadelhubsensor für eine Pumpe-Düse-Einheit und Verfahren zu deren Betreiben
US6588262B2 (en) * 2001-02-14 2003-07-08 Cummins Inc. Motion sensor for high pressure fluid delivery device
DE102006051205A1 (de) * 2006-10-30 2008-05-08 Robert Bosch Gmbh Kraftstoffinjektor mit einer Messeinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016012242A1 (fr) * 2014-07-22 2016-01-28 Delphi International Operations Luxembourg S.À R.L. Injecteur de carburant

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GB2549747A (en) 2017-11-01
WO2017186691A1 (en) 2017-11-02
EP3449115A1 (de) 2019-03-06

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