EP3857046A1 - Injecteur et procédé d'injection de carburant et d'un liquide supplémentaire et utilisation de l'injecteur - Google Patents

Injecteur et procédé d'injection de carburant et d'un liquide supplémentaire et utilisation de l'injecteur

Info

Publication number
EP3857046A1
EP3857046A1 EP19816195.2A EP19816195A EP3857046A1 EP 3857046 A1 EP3857046 A1 EP 3857046A1 EP 19816195 A EP19816195 A EP 19816195A EP 3857046 A1 EP3857046 A1 EP 3857046A1
Authority
EP
European Patent Office
Prior art keywords
injector
nozzle needle
solenoid valve
fuel
combustion chamber
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.)
Withdrawn
Application number
EP19816195.2A
Other languages
German (de)
English (en)
Inventor
Herrmann Rottengruber
Johannes Oder
Thilo Wagner
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.)
Otto Von Guericke Universitaet Magdeburg
Original Assignee
Otto Von Guericke Universitaet Magdeburg
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
Application filed by Otto Von Guericke Universitaet Magdeburg filed Critical Otto Von Guericke Universitaet Magdeburg
Publication of EP3857046A1 publication Critical patent/EP3857046A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0064—Two or more actuators acting on two or more valve bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B17/00—Engines characterised by means for effecting stratification of charge in cylinders
    • F02B17/005—Engines characterised by means for effecting stratification of charge in cylinders having direct injection in the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
    • F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/025—Adding water
    • F02M25/03—Adding water into the cylinder or the pre-combustion chamber
    • 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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—Injectors peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/12—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with non-fuel substances or with anti-knock agents, e.g. with anti-knock fuel

Definitions

  • the invention relates to an injector for injecting fuel and an additional liquid into a combustion chamber of an internal combustion engine, the injector having a first solenoid valve with a first nozzle needle.
  • the invention also relates to a method for injecting fuel and an additional liquid into a combustion chamber of an internal combustion engine, in which a first solenoid valve with a first nozzle needle for injecting a liquid or a mixture into the combustion chamber is provided.
  • the invention also relates to a use of the injector for generating an insulating vapor layer in a combustion chamber of an internal combustion engine.
  • This full-load enrichment is used, for example, to protect components during full-load operation of an internal combustion engine.
  • the additional injected fuel increases the heat capacity of the fuel-air mixture that forms in the combustion chamber.
  • the temperature in the combustion chamber of the internal combustion engine drops and the individual components or assemblies of the internal combustion engine are protected.
  • the fuel additionally injected for this has disadvantages with regard to the consumption and the emissions of the internal combustion engine. Since full-load enrichment, for example for full-load operation, has a negative influence on the has to comply with emission values, developers strive to find other measures to lower the temperature in the combustion chamber of the internal combustion engine.
  • a charge stratification denotes the locally different distribution or composition of the fuel-air mixture in the combustion chamber of the internal combustion engine.
  • stratified charge it is provided that, for example, an ignitable fuel-air mixture is located in a region of a spark plug, while the rest of the combustion chamber is filled with a lean and thus difficult to ignite mixture .
  • the water is more or less homogeneously distributed in the air and therefore also in the combustion chamber of the cylinder.
  • it is very difficult to precisely meter the amount of water from stroke to stroke of the internal combustion engine.
  • Injectors or injection valves are known from the prior art, which precisely inject the amount of fuel, for example calculated by a control unit, in different operating states of an internal combustion engine.
  • Such injectors are actuated electromagnetically, for example.
  • a control unit calculates and controls the electrical impulses for opening and closing the injectors based on current sensor data of the operating state of the internal combustion engine and stored algorithms.
  • Such injectors have a valve body in which a so-called solenoid valve, consisting of a magnet winding or solenoid coil, a guide for a nozzle needle and a nozzle needle is arranged. If a voltage is applied to the magnetic winding, the nozzle needle lifts up from its valve seat and opens a precision hole.
  • the fuel for example under pressure, can be injected through the precision bore into the combustion chamber of an internal combustion engine, whereby it is distributed in the combustion chamber depending on the geometry of the precision bore. If no voltage is applied, the nozzle needle is pressed onto the valve seat by a spring and closes the precision bore. This means that no fuel is injected.
  • the flow rate of the fuel is precisely defined by the precision bore and the current pressure conditions and can therefore be controlled very precisely by influencing the opening time of the injector by the control unit.
  • Such injectors can be switched very quickly and precisely and thus enable a precise injection of fuels or additional liquids. It is known from the prior art to arrange such injectors or injection valves, also referred to as injection nozzles, both in the intake tract and directly in the combustion chamber of the internal combustion engine.
  • the object is to provide an injection device by means of which the known expense of an additional cam is eliminated, the metering of the fuel injection quantity being able to be controlled much more universally and as a function of diverse parameters.
  • the aim is to continue to control the metering of the additional liquid equally by means of a solenoid valve and to take several parameters into account.
  • a high-pressure feed pump is provided as the high-pressure fuel source, which supplies a high-pressure accumulator in which a specific pressure is set and from which the one for fuel injection certain fuel, controlled by the control valve associated with each injector, is withdrawn.
  • a high-pressure accumulator is provided and the injection pressure is therefore advantageously available at a fixed level at all times.
  • the metering device which has an electromagnetic valve, can be used to carry out an injection which is precisely controlled in terms of quantity and injection time.
  • DE 197 47 268 A1 discloses a two-component nozzle for injecting fuel and an additional liquid into a combustion chamber of an internal combustion engine.
  • fuel and additional liquid are mixed, that is to say generally diesel and water, which can take place in the building sections before and after the injection nozzles.
  • the injection can in principle only ever take place in layers, that is to say, for example, fuel and additional liquid cannot be injected in parallel.
  • a nozzle body which has at least one inlet hole for the supply of fuel under high pressure into the two-substance nozzle and nozzle holes for injecting the fuel from the two-substance nozzle into the combustion chamber, with a jacket around the nozzle body, is preferably made of metal, which surrounds at least one cavity adjacent to the outside of the nozzle body, in particular around the nozzle body, for receiving additional liquid, and wherein a supply line for supplying pressurized additional liquid into the cavity as well as one or several injection nozzles are provided for injecting additional liquid from the cavity into the combustion chamber.
  • the two fluids can meet at most in the combustion chamber of the internal combustion engine equipped with the two-substance nozzle according to the invention.
  • a disadvantage of the prior art is that two injectors, which can also be combined to form a structural unit, are often required for injecting a fuel and an additional liquid.
  • the construction and control of such injectors are sometimes very complex.
  • the mixture formation in the combustion chamber of the internal combustion engine can also be controlled only inadequately.
  • the object of the invention is now to provide an injector for injecting fuel and an additional liquid, which has a space-saving, simple construction and with which a precise injection of a fuel and an additional liquid into the combustion chamber of an internal combustion engine can take place.
  • the invention provides that the injector according to the invention, in contrast to conventional electromagnetic injectors from the prior art, is not equipped with a solenoid valve but with two solenoid valves. It is provided that a first solenoid valve is provided for the injection or metering of an additional liquid, such as water, while a second solenoid valve is provided for the injection or metering of a fuel.
  • the first and the second solenoid valve each have at least the components of the solenoid coil, guide for a nozzle needle and a nozzle needle.
  • the injector according to the invention thus contains two independently controllable fluid paths.
  • the injector is provided with a first connection for supplying an additional liquid in a region of its longitudinal axis.
  • the injector is designed with a second connection for supplying a fuel in a lateral area of the injector.
  • This second connection can be attached, for example, in a central region of the outer wall of the injector, wherein the second connection can be arranged at an angle to the longitudinal axis.
  • Such an angle can Range between 15 ° and 75 ° to the longitudinal axis of the injector, preferably at an angle of 45 ° to the longitudinal axis of the injector.
  • a first nozzle needle can be opened, through which an additional liquid, such as water, can flow.
  • an additional liquid such as water
  • the first nozzle needle is pressed by means of a first spring with its, for example, conical tip against a likewise conically ending water chamber which is connected to the first connection and is closed in this way.
  • This first nozzle needle is aligned along a longitudinal axis of the injector.
  • a second nozzle needle of a second solenoid valve is also arranged aligned on the longitudinal axis of the injector, the second nozzle needle being placed between the first nozzle needle and the combustion chamber in the injector.
  • the second nozzle needle has a longitudinal bore, for example centrally located on the longitudinal axis, through which the additional liquid, such as water, for example, which flows out of the first solenoid valve, can flow and thus enter the combustion chamber of the internal combustion engine.
  • the first solenoid valve for example independently of the mode of operation of the second solenoid valve, can inject an additional liquid, such as water, in a metered manner into the combustion chamber.
  • a fuel can flow into the fuel chamber of the injector, which is closed by the second nozzle needle, via the second connection.
  • Such chambers for storing fuel or an additional liquid offer the advantage of compensating for pressure fluctuations.
  • the second nozzle needle By actuating the second solenoid of the second solenoid valve, the second nozzle needle is opened and fuel can be injected into the combustion chamber of the internal combustion engine from the fuel chamber of the injector via the nozzle at the tip of the second nozzle needle. Without this electrical control, the second nozzle needle of the second magnetic valve is pressed by a second spring with its, for example, conical tip against a fuel outlet nozzle of the injector, which also ends in a conical shape, and is closed in this way.
  • the first nozzle needle has to move in the direction of the combustion chamber to open the opening for injecting an additional liquid, while the second nozzle needle has to move in the direction of the combustion chamber to open the opening for injecting fuel into the combustion chamber .
  • a housing of the injector is constructed in three parts and is joined together by means of a first and a second union nut and fixed in a mechanically stable manner.
  • a positioning bolt ensures that the fuel holes in the lower and middle housing are axially aligned with each other.
  • the first and second springs produce a restoring force, by means of which the first and second nozzle needles are pressed back into their respective starting positions after the magnetic forces of the first and second magnetic coils have been withdrawn.
  • a stuffing box is also provided, on which the first spring is supported in order to realize its function, since this first spring is arranged in an inflow channel between the first nozzle needle and the first connection.
  • the lower second nozzle needle is also envisaged to manufacture the lower second nozzle needle from several parts in order to ensure simple assembly of the injector.
  • the second nozzle needle can have a thread onto which an anchor can be screwed.
  • the position of this anchor can be secured, for example, by means of a lock nut or an alternative securing element.
  • the injector according to the invention enables a fuel and an additional liquid, such as water, to be injected independently of one another.
  • a control unit and known system me can be provided for the supply of a fuel or an additional liquid.
  • the fuel and the additional liquid can be supplied with pressure to the injector.
  • the injector according to the invention is advantageously used to generate a locally different composition of the fuel-air mixture, that is to say, for example, charge stratification, in the combustion chamber of the internal combustion engine.
  • a water injection is carried out upstream of the fuel injection, which is carried out by means of the second solenoid valve, and is carried out by means of the first solenoid valve.
  • Evaporation of the injected water allows an insulating vapor layer to be formed which surrounds or envelops the subsequently injected fuel and thus the fuel-air mixture.
  • the insulating vapor layer forms an insulation layer to the cylinder wall and the piston. This results in a reduction in the heat loss through the cylinder walls.
  • FIG. 3 shows a representation of a plurality of injection phases which can be handled by means of the injector according to the invention in an internal combustion engine with an upstream water injection and
  • FIG 1 shows an injector 1 according to the invention for injecting fuel and an additional liquid.
  • Water is described below as an example of such an additional liquid.
  • the invention provides that the injector 1 according to the invention comprises a first solenoid valve 2 and a second solenoid valve 3.
  • the first solenoid valve 2 is used for injection or metering of the set liquid water, which is fed to the injector 1 via the first connection 4.
  • the second solenoid valve 3 is provided for injecting or metering a fuel which is fed to the injector 1 via a second connection 5. Both the fuel and the additional liquid can be supplied to the injector 1 with a corresponding pressure.
  • the first solenoid valve 2 has a first solenoid coil 6 and a first nozzle needle 7, the first nozzle needle 7 being guided and mounted in a corresponding guide within the injector 1.
  • the second solenoid valve 3 has a second solenoid coil 8 and a second nozzle needle 9, the second nozzle needle 9 likewise being guided and mounted in a corresponding guide inside the injector 1.
  • the injector 1 thus has two fluid paths which can be controlled independently of one another.
  • both a fuel and an additional liquid water can be metered in independently of one another and injected or timed into a combustion chamber of an internal combustion engine.
  • the first connection 4 for supplying an additional liquid is arranged, for example, in a region of the longitudinal axis 10 of the injector 1. This is provided for the end of the injector, which faces away from the combustion chamber (not shown) when the injector 1 is in operation.
  • the injector 1 is designed with a second connection 5 for supplying a fuel in a lateral region of the injector 1.
  • This second connection 5 can be attached, for example, in a central region of the outer wall of the injector 1, wherein the second connection 5 can be arranged at an angle to the longitudinal axis.
  • An exemplary arrangement of the second connection 5 is shown in FIG. 1.
  • Such an angle can be in the range between 15 ° and 75 ° to the longitudinal axis 10 of the injector 1, preferably at an angle of 45 ° to the longitudinal axis 10 of the injector 1.
  • the first nozzle needle 7, through which the additional liquid water flows, can be opened by actuating the first solenoid 6 of the first solenoid valve 2. Without this electrical control, the first nozzle needle 7 is pressed by a first spring 11 with its, for example, conical tip against a likewise conically ending water chamber 12, which is connected to the first connection 4, and is closed in this way.
  • This first nozzle needle 7 is arranged aligned along a longitudinal axis 10 of the injector.
  • the second nozzle needle 9 of the second solenoid valve 3 is also arranged aligned on the longitudinal axis 10 of the injector 1, the second nozzle needle 9 being arranged in the region of the longitudinal axis 10 between the first nozzle needle 7 and the combustion chamber in the injector 1 is.
  • the second nozzle needle 9 has a longitudinal bore arranged, for example, in the center and along the longitudinal axis 10. This longitudinal bore enables the additional liquid emerging from the first solenoid valve 2 to get into the combustion chamber of the internal combustion engine.
  • the first solenoid valve 2 can inject an additional liquid such as water in a metered manner into the combustion chamber, regardless of the mode of operation of the second solenoid valve 3.
  • An additional liquid is introduced into an additional liquid chamber 12 inside the injector 1 via the first connection 4.
  • This chamber 12 is closed by the first nozzle needle 7.
  • a pressurized fuel is introduced into a fuel chamber 13 of the injector 1, which is closed by the second nozzle needle 9.
  • Chambers 12 and 13 of this type for storing fuel or an additional liquid offer the advantage of compensating for pressure fluctuations which can occur while the internal combustion engine is in operation.
  • the second nozzle needle 9 is opened and fuel can be injected into the combustion chamber of the internal combustion engine from the fuel chamber 13 of the injector 1 via the nozzle 14 at the tip of the second nozzle needle 9.
  • the second nozzle needle 9 of the second solenoid valve 3 is pressed by means of a second spring 15 with its, for example, conical tip against a likewise conically ending fuel outlet nozzle 14 of the injector 1 and closed in this way.
  • the first nozzle needle 7 has to move in the direction away from the combustion chamber in order to open the opening for injecting an additional liquid, as is the case with the arrow shown in the first nozzle needle 7 in FIG 1 is shown.
  • the second nozzle needle 9 has to move towards the combustion chamber in order to open the opening for injecting fuel into the combustion chamber of the internal combustion engine, as is the case with the arrow shown in the second nozzle needle 9 in FIG Fig. 1 is shown.
  • the housing of the injector 1 can, for example, be constructed in three parts from three housing parts and, when put together, produce a cylindrical body with a base body 18. To fix the three housing parts of the injector to one another, it is provided that a first union nut 16 and a second union nut 17 are arranged at the ends of the injector 1. Such a construction enables simple assembly of the injector 1 and good mechanical stability.
  • the first spring 11 and the second spring 15 each bring about a corresponding restoring force, by means of which the first nozzle needle 7 and the second nozzle needle 9 come back in after the magnetic forces of the first magnet coil 6 and the second magnet coil 8 have been withdrawn their respective starting positions are pressed.
  • a stuffing box 20 is provided, on which the first spring 11 is supported in order to fulfill its function. This is necessary because this first spring 11 is arranged in an inflow channel between the first connection 4 and the first nozzle needle 7 or the additional liquid chamber 12.
  • the lower, second nozzle needle 9 is composed of several parts.
  • the second nozzle needle 9 can, for example, have a thread onto which an anchor can be screwed.
  • the position of this anchor can be secured, for example, by means of a lock nut or an alternative securing element.
  • the injector 1 has a first holder 21, which receives the first solenoid coil 6 and a functionally associated first iron ring 22.
  • the holder 21 also has an electrical connection for connecting the first solenoid 6, for example, to a control unit (not shown).
  • the injector 1 has a second holder 23 which receives the second solenoid coil 8 and a functionally associated second iron ring 24.
  • the second holder 23 also has an electrical connection for connecting the second solenoid 8 to the control unit.
  • Corresponding seals 25 and 26 are provided for sealing the supply lines (not shown) for the first connection 4 and for the second connection 5.
  • the injector 1 enables an independent injection of a fuel and an additional liquid, such as water.
  • a control unit and known systems for supplying a fuel or an additional liquid can be provided to control the injector 1.
  • the fuel and the additional liquid can be supplied with pressure to the injector 1.
  • 2 shows a view of a plurality of outlet openings 27 in the second nozzle needle 9 of the injector 1 according to the invention.
  • the second nozzle needle 9, which has a centrally arranged longitudinal bore, can be designed with a completely continuous longitudinal bore.
  • the second nozzle needle 9 is not designed to end with a central longitudinal bore at its end pointing into the combustion chamber of an internal combustion engine.
  • the end of the second nozzle needle 9 can have a plurality of outlet openings 29 which are not arranged in the region of the longitudinal axis 10. These outlet openings 29 can have a smaller diameter than the longitudinal bore and can be arranged, for example, on a circular path around the longitudinal axis 10.
  • the longitudinal bore is designed as a counterbore, which is connected to six outlet openings 29.
  • These six outlet openings 29 can be arranged at the end of the second nozzle needle 9 such that their respective longitudinal axes intersect with the longitudinal axis 10 of the second nozzle needle 9.
  • the respective longitudinal axes of the six outlet openings 29 are thus at an angle to the longitudinal axis 10, which can be, for example, between 15 ° and 55 °.
  • the design of the end of the second nozzle needle 9 is shown here by way of example and does not represent any restriction to this design.
  • FIG. 3 shows a representation of a plurality of injection phases that can be handled by the injector 1 according to the invention in an internal combustion engine with an upstream water injection.
  • the diagram shows an example of the distance between the piston and top dead center as a function of the angle of the crankshaft.
  • an additional liquid such as water
  • a combustion chamber which can be implemented by the first solenoid valve 2 of the injector 1 according to the invention.
  • a first injection of a fuel in the range between 330 ° and 270 ° and a second injection in a range between 270 ° and 210 ° which can be implemented by the second solenoid valve 3 of the injector 1 according to the invention.
  • This example only serves to illustrate the effort for determining optimal parameter combinations, in which three injection times with their respective mass fractions and pressures have to be coordinated with one another, and the possible uses of the injector 1 according to the invention. It is also envisaged that the injector according to the invention is advantageously used to generate a locally different composition of the fuel-air mixture, that is to say charge stratification, in the combustion chamber of the internal combustion engine.
  • the state of the art and source is herewith stated “Upstream fuel quantity with stratified diesel-water injection”, MTZ 01/2007, year 68, Vieweg Verlag.
  • a water injection upstream of the fuel injection can take place, as shown in FIG. 4a.
  • This water injection is carried out using the first solenoid valve 2.
  • An insulating vapor layer is formed by evaporating the injected water into the hot combustion chamber of the internal combustion engine.
  • the fuel is subsequently injected by means of the second solenoid valve 3.
  • the resulting air-fuel mixture is now surrounded or enveloped by the insulating vapor layer.
  • the formation of the desired vapor layer around the fuel-air mixture in an intake phase is shown in FIG. 4b.

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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)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur (1), un procédé d'injection de carburant et d'un liquide supplémentaire, ainsi qu'une utilisation de l'injecteur (1). L'invention vise à indiquer une solution pour un injecteur (1), qui comporte une structure simple et peu encombrante et qui permet d'injecter avec précision un carburant et un liquide supplémentaire dans la chambre de combustion d'un moteur à combustion interne. Dans le dispositif selon l'invention, une deuxième électrovanne (3) dotée d'une deuxième aiguille d'injecteur (9) est disposée dans l'injecteur (1), et la première aiguille d'injecteur (7) de la première électrovanne (2) et la deuxième aiguille d'injecteur (9) de la deuxième électrovanne (3) sont disposées l'une derrière l'autre sur un axe longitudinal (10) de l'injecteur (1). Dans le procédé selon l'invention, une deuxième électrovanne (3) dotée d'une deuxième aiguille d'injecteur (9) est prévue dans l'injecteur (1), et la première aiguille d'injecteur (7) de la première électrovanne (2) et la deuxième aiguille d'injecteur (9) de la deuxième électrovanne (3) sont disposées l'une derrière l'autre sur un axe longitudinal (10) de l'injecteur (1) et les aiguilles d'injecteur (7, 9) peuvent être commandées indépendamment les unes des autres.
EP19816195.2A 2018-09-25 2019-09-21 Injecteur et procédé d'injection de carburant et d'un liquide supplémentaire et utilisation de l'injecteur Withdrawn EP3857046A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018007614.9A DE102018007614B4 (de) 2018-09-25 2018-09-25 Injektor und Verfahren zur Einspritzung von Kraftstoff und einer Zusatzflüssigkeit sowie Verwendung des Injektors
PCT/DE2019/000247 WO2020064038A1 (fr) 2018-09-25 2019-09-21 Injecteur et procédé d'injection de carburant et d'un liquide supplémentaire et utilisation de l'injecteur

Publications (1)

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EP3857046A1 true EP3857046A1 (fr) 2021-08-04

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EP19816195.2A Withdrawn EP3857046A1 (fr) 2018-09-25 2019-09-21 Injecteur et procédé d'injection de carburant et d'un liquide supplémentaire et utilisation de l'injecteur

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US (1) US11300089B2 (fr)
EP (1) EP3857046A1 (fr)
CN (1) CN112752902A (fr)
DE (1) DE102018007614B4 (fr)
WO (1) WO2020064038A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI748368B (zh) 2011-01-21 2021-12-01 美商拉布拉多診斷有限責任公司 樣本使用最大化之系統及方法
CN111535958B (zh) * 2020-05-29 2021-07-13 一汽解放汽车有限公司 一种双燃料喷射器及其喷射方法
GB2617859A (en) * 2022-04-22 2023-10-25 Delphi Tech Ip Ltd Fuel injector
US11873776B1 (en) 2022-08-02 2024-01-16 Caterpillar Inc. Fuel injector drive system

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625698B4 (de) 1996-06-27 2005-09-22 Robert Bosch Gmbh Einspritzeinrichtung zum kombinierten Einspritzen von Kraftstoff und Zusatzflüssigkeit
DE19746489A1 (de) 1997-10-22 1999-04-29 Bosch Gmbh Robert Kraftstoffeinspritzanlage für eine Brennkraftmaschine
DE19747268A1 (de) 1997-10-25 1999-04-29 Bosch Gmbh Robert Zweistoffdüse zur Einspritzung von Kraftstoff und einer Zusatzflüssigkeit
DE10061035A1 (de) * 2000-12-08 2002-06-13 Fev Motorentech Gmbh Einspritzeinrichtung zum dosierten Einspritzen von zwei Flüssigkeiten in einem Reaktionsraum
DE102005004327A1 (de) 2005-01-31 2006-08-03 Robert Bosch Gmbh Elektrische Trennung in Kraftstoffinjektoren
JP2009228609A (ja) 2008-03-25 2009-10-08 Toyota Central R&D Labs Inc インジェクタ及び改質ガスエンジンシステム
FI123513B (fi) * 2010-12-02 2013-06-14 Waertsilae Finland Oy Polttoaineen syöttöyksikkö, menetelmä sen käyttämiseksi ja polttomoottori
US9422899B2 (en) * 2011-10-24 2016-08-23 Caterpillar Inc. Dual fuel injector with hydraulic lock seal and liquid leak purge strategy
US20140373806A1 (en) * 2012-01-05 2014-12-25 Deyang Hou Fuel injector for multi-fuel injection with pressure intensification and a variable orifice
US20160123286A1 (en) * 2012-06-10 2016-05-05 Quantlogic Corporation Method, system, and fuel injector for multi-fuel injection with pressure intensification and a variable orifice
DE102014205454A1 (de) 2014-03-24 2015-09-24 Robert Bosch Gmbh Gasinjektor mit Doppelventilnadel
JP2016017514A (ja) * 2014-07-11 2016-02-01 株式会社デンソー 燃料噴射装置
US9709005B2 (en) 2015-02-18 2017-07-18 Cummins Power Generation Ip, Inc. Air assisted injector for wet compression atomization
JP2017089554A (ja) * 2015-11-12 2017-05-25 マツダ株式会社 エンジンの制御装置
DE102016200237B4 (de) * 2016-01-12 2022-01-20 Ford Global Technologies, Llc Direkteinspritzende aufgeladene Brennkraftmaschine mit Wassereinspritzung und Verfahren zum Betreiben einer derartigen Brennkraftmaschine
DE102017201581A1 (de) * 2017-02-01 2018-08-02 Robert Bosch Gmbh Magnetventilanordnung für einen Kraftstoffinjektor zum Einspritzen von flüssigem und/oder gasförmigem Kraftstoff

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Publication number Publication date
DE102018007614A1 (de) 2020-03-26
WO2020064038A1 (fr) 2020-04-02
US20210254589A1 (en) 2021-08-19
CN112752902A (zh) 2021-05-04
US11300089B2 (en) 2022-04-12
DE102018007614B4 (de) 2023-04-27

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