EP3172429B1 - Kraftstoffeinspritzer - Google Patents

Kraftstoffeinspritzer Download PDF

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Publication number
EP3172429B1
EP3172429B1 EP15736450.6A EP15736450A EP3172429B1 EP 3172429 B1 EP3172429 B1 EP 3172429B1 EP 15736450 A EP15736450 A EP 15736450A EP 3172429 B1 EP3172429 B1 EP 3172429B1
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EP
European Patent Office
Prior art keywords
needle
injector
valve body
control chamber
electrical
Prior art date
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EP15736450.6A
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English (en)
French (fr)
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EP3172429A1 (de
Inventor
Philippe Legrand
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Delphi International Operations Luxembourg SARL
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Delphi International Operations Luxembourg SARL
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Priority to EP18152426.5A priority Critical patent/EP3346124B1/de
Publication of EP3172429A1 publication Critical patent/EP3172429A1/de
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Publication of EP3172429B1 publication Critical patent/EP3172429B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus

Definitions

  • the invention relates to a fuel injector provided with a device for detecting the position of the needle.
  • a fuel injector conventionally comprises a needle controlled opening and closing depending on the pressure in a control chamber, which pressure is a function of the position of a control solenoid valve. These small displacements are carried out at high speed and, the regularly increased performances now require for an optimal control a feedback as to the real position of the needle.
  • Devices are known in which a sensor is arranged on the injector or an injector in which the surfaces of the components of the body are electrically insulated so that a measurement of electrical resistance can be made between two elements of the body of the injector as described in the document DE102004015745 A1 . These complex and expensive devices have not yet proven their industrial realism and should be offered a simple and effective device.
  • the present invention proposes to solve at least partially these problems by proposing a fuel injector comprising an injector body in which are arranged a movable needle between a fully open position and a closed position and a spring constantly urging the needle to the closed position, the injector being arranged so that in use the injector body is in electrical contact with the electrical ground.
  • the injector is further provided with a device for locating the position of the needle in which an electrical circuit is closed when the needle is in the fully open position and also when the needle is in the closed position. The needle is then in electrical contact with the mass, the circuit being open in any other intermediate position of the needle, the needle not being grounded.
  • the circuit comprises the injector body, the needle and the spring and an electrical connection extending from the spring to an end outside the injector, such as a terminal of a connector.
  • an electrical measurement can be made between said outer end and the ground.
  • the injector includes, inter alia, a nozzle and a control valve, the nozzle itself including a nozzle body, a top guide and a bottom guide, a valve body seat, and pilot holes. injection.
  • the nozzle also includes the needle which extends between a first end provided with a needle seat and a second end forming the head of the needle, the needle being slidably arranged between the top guide and the bottom guide and able to move between the closed position in which the needle seat is in contact with the valve body seat, the fuel injection being prevented and, the fully open position in which the needle seat is moved away from the seat of valve body the injection being possible.
  • the nozzle also comprises the compressed metal spring between a support surface integral with the nozzle body and a shoulder of the needle.
  • the control valve comprises a valve body arranged fixed on the nozzle body so as to define together a control chamber in which the head of the needle is located, the movements of the needle being a function of the pressure variations in the nozzle. control chamber so that in the fully open position, the top of the needle head is in contact with a wall of the control chamber, said wall forming the ceiling of the control chamber.
  • the injector body includes, inter alia, the nozzle body and the valve body.
  • the device for locating the position of the needle makes it possible to generate a variable electrical signal representative of the position of the needle.
  • the device comprises electrical isolation of the surfaces of the needle, or surfaces of the injector body, which may be in contact with each other, except for the needle seat and the body seat valve, the top of the needle head and the ceiling of the control chamber and, the shoulder support of the spring on the needle.
  • the other spring support face, bearing surface integral with the nozzle body is electrically insulated.
  • the invention consists in that the high guide is integrated in the nozzle body, the interface between the nozzle body and the valve body being plane.
  • the electrical circuit further includes a flat disk-shaped member arranged between the nozzle body and the valve body.
  • the disc is provided with an opening arranged just above the control chamber, the opening being slightly smaller than the control chamber so that the disc penetrates slightly into the control chamber and extends to the periphery. from the ceiling of the control room.
  • the disk is formed of a metal disc provided on its two opposite faces with an electrical insulating coating except for the periphery of the opening located at the periphery of the ceiling surface without insulation against which the spring is supported.
  • the insulating coating can be obtained via the deposition of a layer of material or via a suitable surface treatment
  • the planar disk is provided with positioning apertures and protuberances extending perpendicularly to the plane of the disk from the periphery of said positioning apertures so as to complementably fit into blind positioning holes provided in the valve body and in the nozzle body.
  • the protuberances are obtained by folding at right angles cut portions of the disk.
  • the disk may be flat and centering means, such as pins, may be reported on the disk.
  • the electrical connection further comprises an intermediate connection link passing through a sealed conduit passing through the valve body.
  • the connection link extends from an end connected to the metal disk to said outer end, for example a terminal of a connector.
  • the high guide is an independent piece arranged fixed between the nozzle body and the valve body, the spring is compressed between a bearing face integrated with the needle and a face. solidarity support of the high guide.
  • the electrical connection includes an annular disc interposed between the spring and the high guide, the interface between the annular disk and the top guide being electrically insulated, the needle passing through a central opening of the annular disk.
  • the top guide is then provided with a conduit passing through it, a connecting lug being shaped to extend from the annular disk into said conduit.
  • the electrical connection includes an intermediate connection link extending through an electrically insulated and sealed conduit extending through the valve body to an end connected to the annular disc.
  • the electrical resistance between the needle and the ground is less than 1kOhms when the circuit is closed and is greater than 100 kOhms, or 400 kOhms, when the circuit is open.
  • the important thing is that there is a big difference between the open circuit and closed circuit resistance values so that the discrimination is easy.
  • FIG. 1 a first embodiment of the invention relating to a fuel injector 10, here a diesel injector although the invention is fully transferable to a fuel injector or other fuel, the injector 10 generally an injection system 12 comprising several injectors 10.
  • the description will detail the elements of the invention and will remain more succinct and general as to the surrounding elements.
  • the injector 10 extends along a main axis A and comprises, from the bottom upwards, according to the conventional and nonlimiting direction of the figures, a nozzle 14 comprising a needle 16 arranged in a nozzle body 18 and then a control valve 20 arranged in a valve body 22 and an actuator 24 arranged in an actuator body 26.
  • the nozzle bodies 18, valve body 22 and actuator body 26 are held integral with one another by an injector nut. 28 which bears on a shoulder of the nozzle body 18 and is screwed on the actuator body 26, the valve body 22 being sandwiched between the two other bodies, the three bodies and the nut forming the body of the injector 29.
  • the nozzle body 18 comprises an inner axial bore extending from an upper end, where it widens slightly in a deep counterbore to define in part a control chamber 32, to a low end 34 closing in a point so as to form a tapered valve body seat 36 for controlling access of fuel to injection holes 38 extending through the conical wall of the nozzle body 18.
  • the bore 30 forms a high cylindrical guide 40 and a low cylindrical guide 42 between which the needle 16 is arranged axially sliding.
  • the terms "high” and "low” are used here not only in reference to the orientation of the figure, but also in reference to the usual name given to these elements by professionals.
  • the needle 16 is generally cylindrical and extends axially A between a needle head 44, at the top of the figure, and a pointed end 46, at the bottom of the figure, forming a needle seat 48 cooperating with the seat of valve body 36 of the body 18.
  • the needle head 44 opens into the control chamber 32.
  • the head 44 has a diameter d44, smaller than the rest of the needle 16, and extends upwardly from a shoulder 50 to a surface of top of head 52.
  • the body of the control valve 22 is conventionally arranged above the nozzle body 18 so that the lower face 54 of the valve body forms in its central part the ceiling 56 of the control chamber 32.
  • a metal spring 58 bears against the shoulder 50 of the needle so as to permanently urge the needle 16 towards a closed position PF in which the needle seat 48 is in contact sealed against the valve body seat 36 of the body.
  • the valve body 22 is, moreover, conventionally provided with a bore 60 opening on a wide space 62, a magnetic armature assembly and valve stem 64 being conventionally slidably mounted in the bore 60, said assembly 64 having generally the shape a T, the upper bar representing a magnetic armature and the vertical leg representing a valve stem.
  • valve body 22 Parallel to the bore 60, the valve body 22 is traversed from one side by a conduit 66 opening shown to the right in the section of the figure 3 although, as will be explained further the conduit could be made at another location of the valve body 22, provided it opens through.
  • the actuator body 26 conventionally arranged above the control valve 20 is provided with a complementary conduit 68 arranged to align with the opening conduit 66 of the valve body and to extend to a connector 70 arranged at the top of the actuator body 26.
  • the injector 10 is moreover conventionally provided with a circulation circuit 72 of the fuel which on the one hand allows the supply of the high pressure fuel via a high pressure circuit 74, brought from an inlet mouth to the d injection 38 and, on the other hand, recirculation of fuel to a low pressure tank via a low pressure circuit 76.
  • the high pressure circuit 74 comprises in particular a bypass channel 78 leading to the control chamber 32, chamber 32 where the low-pressure circuit 76 is restarted via an evacuation channel 80 controlled in opening and closing by the control valve 20.
  • the actuator 24 When the actuator 24, typically an electromagnet, is electrically powered, it attracts the magnetic armature 64 which opens the evacuation channel 80 and allows the trapped fuel of the control chamber 32 to evacuate to the low pressure circuit 76.
  • the pressure in the control chamber 36 then drops and the needle 16 moves in the bore 30 of the nozzle body 18 to a fully open position PO in which the needle seat 48 is moved away from the body seat. valve 36, so as to allow the injection of fuel via the injection holes 38, and wherein, the top 52 of the needle head is in contact with the ceiling surface 56 of the control chamber 32.
  • the magnetic armature assembly and valve stem 64 is pushed by a valve spring to a position in which the exhaust channel 80 is closed which holds in the control chamber 32 the high pressure fuel that arrives there.
  • the pressure in the control chamber 32 then rises and, the needle 16, pushed back by the spring 58 and by the pressure in the control chamber 32 moves towards the closed position PF in which the needle seat 48 is in position. sealing contact against the valve body seat 36, so as to prohibit the injection of fuel and wherein, the top 52 of the needle head is remote from the ceiling surface 58 of the control chamber.
  • the injector 10 further comprises a device 82 for identifying the extreme positions of the needle.
  • the device 82 is an electrical circuit 84 making it possible to carry out an electrical measurement ME between a lug 86 of the connector and the mass M to which the nozzle body 18, the valve body 22, the actuator body 26 and the injector nut 28.
  • the electrical circuit 84 comprises an electrical connection 88 which extends from the lug 86 to the spring 58, then the spring 58 itself, then the needle 16 to the needle seat 48 and finally the nozzle body 18 from the valve body seat 36 to the ground M.
  • the electrical circuit 84 comprises the electrical connection 88 of the lug 84 to the spring 58, then the spring 58 itself, then the needle 16 to its top 52 of the head, then the valve body 22 from the ceiling 56 from the control chamber to the mass M.
  • An injection cycle includes not only a main opening in which the needle 16 traverses the entire displacement between the two extreme positions, but also short openings during which the needle 16 leaves the closed position PF but n does not reach the fully open position PO and stops at an intermediate position Pi, said ballistic position.
  • the needle seat 48 is away from the valve body seat 36 and the top 52 of the needle head is away from the ceiling 56 of the control chamber so that the electrical circuit 84 is open.
  • the electrical measurement ME performed is then different from that performed when the circuit 84 is closed.
  • the electrical measurement made is related to the electrical control of the actuator.
  • the circuit 84 when the circuit 84 is closed, if the actuator is electrically powered then the needle is in fully open position PO and if the actuator is not powered, the needle 16 is in the closed position PF and, if the actuator is electrically powered only to control a short opening, then the circuit 84 initially closed, opens when the needle leaves the closed position PF and then the circuit 84 closes again which indicates that the needle 16 has returned to the closed position PF without opening fully.
  • the injector 10 is schematized according to an electrical circuit 84 comprising, between the lug 86 and the mass M, the needle 16 schematically as a switch in parallel which is placed an insulation resistance Ri.
  • the insulation resistance Ri has a value typically greater than 100 kOhms so that in the closed position PF the electrical resistance of the circuit 84 is zero and, in the open position PO, the electrical resistance of the circuit 84 is worth the insulation resistance Ri.
  • the injector 10 is connected to an ECU computer comprising a fixed electrical resistance Re, much lower than the insulation resistance Ri, it may for example be chosen a fixed resistor Re whose value is between 10 and 50 kOhms for example 20 kOhms, two other electrical resistors R1, R2, and a voltage comparator.
  • the comparator terminals of the voltage comparator arrive firstly a first reference voltage whose level is a function of the combination of the two other electrical resistors R1, R2, and secondly, a second voltage varying according to the open or closed state of the circuit 84.
  • the comparator terminal is also connected to the terminal 86 of the injector 10.
  • this terminal receives a zero voltage because it is connected to the ground M and, in the open position PO, the same terminal receives a non-zero voltage and greater than the reference electrical voltage. .
  • the change thus perceived by the voltage comparator informs of the position of the needle 16.
  • the electrical circuit 84 comprises on the one hand the electrical insulation of the surfaces of the needle 16 likely to be in contact with the nozzle body 18.
  • the surfaces S1 and S2 guided respectively in the top 40 and bottom guides 42 are coated with an insulating surface coating Rie.
  • insulating surface coating Rie Among the known deposits are aluminum nitride, aluminum oxide, amorphous carbon "DLC", there are also plastic materials with high mechanical properties, alternatively electrical insulation of the surfaces can be achieved by methods surface oxidation or surface nitriding. Additional sleeves arranged around the needle, or in the injector body, may also be envisaged.
  • the needle seat 48, the top 52 of the head and the shoulder 50 against which the spring 58 rests remain electrically conductive and devoid of an insulating coating Rie, but these surfaces may have other surface coatings both They are electrically conductive.
  • the insulating coating Rie coats the corresponding surfaces of the nozzle body 18, including the top 40 and bottom 42 guides, or even the surfaces of the nozzle body and the surfaces of the needle. In this case, the deposit, it will sometimes be preferred the arrangement of insulating sleeves reported in the bores.
  • the electrical connection 88 of the electrical circuit 84 comprises a high link 90 which extends through the actuator body 26 into the complementary conduit 68 and, through the valve body 22 into the emerging conduit 66, then a disc-shaped member 92 arranged between the valve body 22 and the nozzle body 18.
  • the disc 92 is provided with an opening 94 arranged just above the control chamber 32, the opening 94 being central in the example of the figure 3 .
  • the opening 94 is slightly smaller than the control chamber 32 so that the disk extends towards the inside of the control chamber, around the ceiling 56.
  • This peripheral extension 96 is sufficient for its lower face 98 to serve as a face resting the spring 58 which is compressed between the bearing face 98 and the shoulder 50 of the needle.
  • the opening 94 is sufficiently wide that, in the fully open position PO of the needle 16, the head 44 can pass through the opening 90 without touching its edge and coming into contact with the ceiling 56 of the control room 32.
  • the disc 92 is a metal disc whose two opposite faces are electrically insulated with the exception of the bearing face 98 of the spring and of course the connection with the high link 90 which remain electrically conductive.
  • the opposite faces of the disk 92 may be electrically conductive but in this case are the faces of the valve body and the nozzle body in contact with the disk 92 which must be electrically insulated.
  • the disk 92 is provided with other complementary openings in particular not to close the high pressure circuit 74 leading to the control chamber 32 or to the injection holes 38. It is possible to distinguish the openings necessary for the fuel circulation circuits as well as two symmetrical openings 120 for positioning the nozzle body 18 with respect to the valve body 22. It is known to precisely position the valve body and the nozzle body by means of centering pins. This solution can be extended in the context of the present invention, the pins passing through said positioning openings 120 to be arranged in the nozzle body and in the valve body in complementary blind bores. These pins must then be electrically isolated from the disk 92. However, as shown in FIG.
  • the side walls of the control chamber can be electrically insulated so as not to risk creating a short circuit between an intermediate coil of the spring 58 and said wall.
  • the principle of the example is identical to that of the first mode, however, the example is distinguished mainly by the very structure of the injector 10 in which the top guide 40 is an independent piece 100 arranged between the nozzle body 18 and the valve body 22 and held fixed by the compression exerted by the injector nut 28.
  • the high guide 100 guides the needle head 44 through a guide bore 102 and, in combination with the body of the valve 22, said guide bore 102 defines the control chamber 32.
  • the bottom guide 42 is close to the needle seats 48 and the valve seat 36, and the electrically insulated surfaces are, in the nonlimiting example chosen, limited to the guide surfaces S1, S2.
  • the needle 16 is provided with an annular protuberance whose upper face, directed towards the needle head, plays a role similar to the shoulder 50 of the first embodiment, shoulder 50 against which the spring 58 is in support and urges the needle 16 to the closed position PF.
  • the spring 58 is thus arranged under the top guide 100, and no longer in the control chamber 32, and is pressed against said shoulder 50.
  • the top guide 100 is further provided with a through duct substantially parallel to the guide bore 102, through which extends an intermediate connecting link 104 which can be either integrated with the high link 90 and simply extend it to under the high guide 100, be independent of the high link 90 and be connected thereto.
  • the electrical circuit 84 comprises a disc piece 106 comprising a disc 108 provided with a central opening 110, annular disc 108 which outwardly extends a connecting lug 112.
  • the annular disc 108 is arranged between the top guide 100 and the spring 58, the needle 16 extending through the opening 110.
  • the lower face 114 of the disc serves as a support surface for the spring 58 while the connecting lug 112 is conform to the profile of the top guide 100, as shown on the figure 5 , to join the intermediate connecting link 104 under the high guide 100.
  • the disc piece 106 is metallic and coated with an electrical insulating coating Rie, with the exception of the bearing surface 114 of the spring and the end of the lug 112 electrically connected to the intermediate connection link 104.
  • the intermediate connecting link 104 takes the form of a rigid pin extending in a straight line parallel to the main axis A and the lug 112 is only a small protrusion of the annular disk 108.
  • the washer is devoid of tab.
  • the electrical circuit 84 is closed and comprises the high link 90 and the intermediate connecting link 104, then the disc piece 106, then the spring 58, then the needle 16 to needle seat 48 and finally the nozzle body 18 from the valve body seat 36 to the mass M.
  • the electrical circuit 84 is also closed and it comprises the high link 90 and the intermediate connection link 104, then the disc piece 106, then the spring 58, then the needle until at the top 52 of the head, then the valve body 22 from the ceiling 56 of the control chamber to the mass M.

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

Claims (4)

  1. Kraftstoffeinspritzer (10) mit einer Düse (14) und einem Steuerventil (20), wobei der Einspritzkörper (29) unter anderem den Ventilkörper (22) und den Düsenkörper (18) enthält, in welchem eine zwischen einer vollständig geöffneten Position (PO) und einer geschlossenen Position (PF) bewegliche Nadel (16) und eine Metallfeder (58) angeordnet sind, die zwischen einer fest mit dem Düsenkörper (18) verbundenen Auflagefläche (98) und einer Schulter (50) der Nadel (16) zusammengedrückt wird, wobei die Feder (58) die Nadel (16) dauerhaft zur geschlossenen Position (PF) hin beaufschlagt, wobei der Einspritzer (10) so angeordnet ist, dass bei Verwendung der Einspritzkörper (29) elektrisch in Kontakt mit der elektrischen Masse (M) ist,
    wobei die Düse (14) den Düsenkörper (18), eine obere Führung (40) und eine untere Führung (42), einen Ventilkörpersitz (36) und Einspritziochungen (38) enthält und auch die Nadel (16) enthält, die sich zwischen einem ersten Ende (46), das mit einem Nadelsitz (48) versehen ist, und einem zweiten Ende erstreckt, das den Kopf (44) der Nadel bildet, wobei die Nadel (16) zwischen der oberen Führung (40) und der unteren Führung (42) gleitbeweglich gelagert ist und sich zwischen der geschlossenen Position (PF), in welcher der Nadelsitz (48) mit dem Ventilkörpersitz (36) in Kontakt ist und die Kraftstoffeinspritzung unterbunden wird, und der vollständig geöffneten Position (PO) verlagern kann, in welcher der Nadelsitz (48) vom Ventilkörpersitz (36) entfernt liegt und die Einspritzung möglich ist,
    wobei das Steuerventil (20) den Ventilkörper (22) enthält, der fest am Düsenkörper (18) angeordnet ist, so dass sie zusammen einen Steuerraum (32) definieren, in welchen der Kopf (44) der Nadel liegt, wobei die Verlagerungen der Nadel (16) Funktion von Druckänderungen in dem Steuerraum (32) sind, so dass in der vollständig geöffneten Position (PO) der Scheitel (52) des Nadelkopfes (44) mit einer Wand (56) des Steuerraums in Kontakt ist, wobei die Wand die Decke (56) des Steuerraums bildet,
    wobei der Einspritzer (10) ferner mit einer Vorrichtung (82) zum Orten der Position der Nadel versehen ist, wobei ein Stromkreis (84) dann geschlossen ist, wenn die Nadel (16) in der vollständig geöffneten Position (PO) ist, und auch dann, wenn die Nadel (16) in geschlossener Position (PF) ist, wobei die Nadel (16) dann elektrisch mit der Masse (M) in Kontakt ist, wobei der Stromkreis in jeglicher anderen, zwischengeordneten Position (Pi) der Nadel (16) geöffnet ist, wobei die Nadel (16) nicht an der Masse (M) anliegt,
    dadurch gekennzeichnet, dass
    die Vorrichtung (82) zum Orten der Position der Nadel gestattet, ein variables elektrisches Signal (S) zu erzeugen, das für die Position der Nadel (16) repräsentativ ist, wobei die Vorrichtung (82) enthält
    die elektrische Isolierung (Rie) der Flächen der Nadel (16) bzw. des Einspritzkörpers (29), die miteinander in Kontakt sein können, abgesehen von dem Nadelsitz (48) und dem Ventilkörpersitz (36), dem Scheitel (52) des Nadelkopfes und der Decke (56) des Steuerraums (32), und von der Schulter (50) zum Abstützen der Feder (58) an der Nadel (16) und der Auflageseite (98) der fest mit den Düsenkörper verbundenen Feder, und wobei
    die obere Führung (40) dem Düsenkörper (18) eingegliedert ist, wobei die Schnittstelle zwischen Düsenkörper (18) und Ventilkörper (22) eben ist, wobei die elektrische Vorrichtung (82) ferner ein Organ in Form einer flachen Scheibe (92) aufweist, die zwischen dem Düsenkörper (18) und dem Ventilkörper (22) vorgesehen ist, wobei die Scheibe (92) mit einer Öffnung (94) versehen ist, die sich knapp oberhalb des Steuerraums (32) befindet, wobei die Öffnung (94) geringfügig kleiner als der Steuerraum (32) ist, so dass die Scheibe (92) sich am Umfang (96) der Decke (56) des Steuerraums erstreckt, wobei die Scheibe (92) aus einer Metallscheibe gebildet ist, die an ihren beiden entgegengesetzten Seiten mit einer elektrisch isolierenden Beschichtung (Rie) versehen ist, abgesehen von dem Rand der Öffnung am Umfang (96) der Decke, welche Fläche frei von einer Isolierung ist und an welche die Feder (58) sich abstützt, so dass in der vollständig geöffneten Position (PO) der Nadelkopf (44) sich durch die Öffnung (94) hindurch erstreckt und sein Scheitel (52) in Kontakt mit der Decke (56) des Steuerraums ist.
  2. Einspritzer (10) nach Anspruch 1, wobei die flache Scheibe (92) mit Positionieröffnungen (120) und mit Vorsprüngen (122) versehen ist, die sich senkrecht zur Ebene der Scheibe (92) ausgehend von dem Rand der Positionieröffnungen (120) erstrecken, so dass sie sich in komplementärer Weise in Positioniersacklochbohrungen einfügen, die in dem Ventilkörper (22) und in dem Düsenkörper (18) vorgesehen sind.
  3. Einspritzer (10) nach einem der Ansprüche 1 oder 2, wobei die elektrische Verbindung ferner eine Zwischenverbindung aufweist, die durch eine dichte Rohrleitung (66) hindurch verläuft, welche den Ventilkörper (22) durchsetzt, wobei die Zwischenverbindung (90) sich von einem mit der Metallscheibe (92) verbundenen Ende bis zum äußeren Ende (86) erstreckt.
  4. Einspritzer (10) nach einem der vorangehenden Ansprüche, wobei der Stromkreis (84) ferner eine elektrische Verbindung (84, 90, 92, 104, 106) aufweist, die sich von der Feder (58) an einem äußeren Ende (86) zum Einspritzer erstreckt, wie etwa an einem Anschlussstück (86) eines Verbinders (70), so dass eine elektrische Messung (ME) zwischen dem äußeren Ende (86) und der Masse (M) erfolgen kann.
EP15736450.6A 2014-07-22 2015-07-08 Kraftstoffeinspritzer Active EP3172429B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18152426.5A EP3346124B1 (de) 2014-07-22 2015-07-08 Kraftstoffinjektor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1457078A FR3024183B1 (fr) 2014-07-22 2014-07-22 Injecteur de carburant
PCT/EP2015/065583 WO2016012242A1 (fr) 2014-07-22 2015-07-08 Injecteur de carburant

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP18152426.5A Division EP3346124B1 (de) 2014-07-22 2015-07-08 Kraftstoffinjektor
EP18152426.5A Division-Into EP3346124B1 (de) 2014-07-22 2015-07-08 Kraftstoffinjektor

Publications (2)

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EP3172429A1 EP3172429A1 (de) 2017-05-31
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Publication number Publication date
EP3172429A1 (de) 2017-05-31
FR3024183B1 (fr) 2019-07-26
CN106662055A (zh) 2017-05-10
FR3024183A1 (fr) 2016-01-29
EP3346124B1 (de) 2020-06-17
US20170268473A1 (en) 2017-09-21
EP3346124A1 (de) 2018-07-11
WO2016012242A1 (fr) 2016-01-28
JP2017524864A (ja) 2017-08-31
CN106662055B (zh) 2019-04-23
JP6516386B2 (ja) 2019-05-22
US10502172B2 (en) 2019-12-10

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