EP3364015B1 - Soupape de commutation électromagnétique et pompe haute pression à carburant - Google Patents

Soupape de commutation électromagnétique et pompe haute pression à carburant Download PDF

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Publication number
EP3364015B1
EP3364015B1 EP17156169.9A EP17156169A EP3364015B1 EP 3364015 B1 EP3364015 B1 EP 3364015B1 EP 17156169 A EP17156169 A EP 17156169A EP 3364015 B1 EP3364015 B1 EP 3364015B1
Authority
EP
European Patent Office
Prior art keywords
armature
pole piece
switching valve
outer periphery
region
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.)
Active
Application number
EP17156169.9A
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German (de)
English (en)
Other versions
EP3364015A1 (fr
EP3364015B8 (fr
Inventor
Matthias Bleeck
Bernd Gugel
Andreas Mühlbauer
Henry Meißgeier
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.)
Vitesco Technologies GmbH
Original Assignee
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP17156169.9A priority Critical patent/EP3364015B8/fr
Priority to KR1020170165480A priority patent/KR102017955B1/ko
Priority to CN201810149415.3A priority patent/CN108425775B/zh
Priority to JP2018023926A priority patent/JP6542405B2/ja
Priority to US15/897,398 priority patent/US20180230955A1/en
Publication of EP3364015A1 publication Critical patent/EP3364015A1/fr
Application granted granted Critical
Publication of EP3364015B1 publication Critical patent/EP3364015B1/fr
Publication of EP3364015B8 publication Critical patent/EP3364015B8/fr
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Anticipated expiration legal-status Critical

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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
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F02M59/368—Pump inlet valves being closed when actuated
    • 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
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • 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
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0628—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a stepped armature
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • 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
    • F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
    • F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/08—Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux
    • 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
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures

Definitions

  • the invention relates to an electromagnetic switching valve for a fuel injection system of an internal combustion engine, and to a high-pressure fuel pump having such an electromagnetic switching valve.
  • High-pressure fuel pumps in fuel injection systems in internal combustion engines are used to apply a high pressure to a fuel, the pressure being, for example, in gasoline internal combustion engines in the range from 150 bar to 400 bar and in diesel internal combustion engines in the range from 1500 bar to 2500 bar.
  • valve arrangements can be provided at different positions on the path that the fuel takes from a tank to the respective combustion chamber, for example as an inlet valve or outlet valve on a high-pressure fuel pump that pressurizes the fuel, but also, for example, as a relief valve in various positions the fuel injection system, for example on a common rail, which stores the pressurized fuel before the injection into the combustion chamber.
  • Fast switching solenoid valves are often used for volume flow and / or pressure control.
  • a return spring holds a closing element a valve area of such an electromagnetic switching valve open or closed against a volume flow.
  • the associated actuator area that is to say the magnetic actuator, which opens or closes the closing element, is designed in such a way that the return spring can overpress the actuator force of the magnetic actuator in a certain time, in order thus to switch the switching valve.
  • Electromagnetic switching valves are known from DE 10 2014 214231 A1 , US 2007/176716 A1 , JP 2002 310029 A , DE 10 2009 054838 and US 2004/050978 A1 .
  • the switching magnet has components separated by a force-generating air gap, namely a movable armature and a fixed pole core, which are kept apart by the return spring.
  • a force-generating air gap namely a movable armature and a fixed pole core
  • the switching magnet By activating a solenoid in the switching magnet by applying electric current, a magnetic field is built up in a winding of the solenoid.
  • This magnetic field induces a magnetic flux in the surrounding metal components, in particular in the armature and the pole core, so that a magnetic force is built up between the armature and the pole core.
  • a restoring force of the restoring spring is overcome by this magnetic force and the coupled hydraulics are controlled.
  • the magnetic force drops and the restoring force controls the hydraulic system in the starting position. So far, the dynamics of the switching valve have been designed for the operating state in which the fastest switching characteristics are required during operation. However, this increases the momentum forces between the switching magnetic components, namely the armature and the pole core.
  • the switching valve has so far been designed so that the highest possible magnetic flux density in the air gap between armature and pole core occurs at the operating point at which the maximum air gap between armature and pole core is present and at which a balance of forces between the return spring and the magnetic force of the solenoid is established is set so that the moving components are excited to move as quickly as possible. During the movement process, the moving components are then accelerated further by the magnetic force and the air gap is reduced. In the state of the minimum air gap, the magnetic force is then maximum.
  • the impulse forces depend on the mass of the moving components and their speed. With high impulse forces, the consequence is that high wear can occur between the components and the noise level during operation is very high. Noise occurs every time the switching state changes, both from the solenoid itself and from the hydraulics. At least two components hit each other and thus generate noise.
  • such a switching valve is used as a digital inlet valve on a high-pressure fuel pump in a fuel injection system of an internal combustion engine.
  • the switching time of such an intake valve is designed so that it is able to switch quickly even at the highest engine speed of the internal combustion engine.
  • this is in contrast to the goal that no significant noise should be generated in another operating state of the internal combustion engine, namely when the engine is idling.
  • the switching valve was designed for the switching time for the operating point with the highest switching dynamics. Attempts have been made to reduce noise and wear for movements that are contrary the switching direction of the switching magnet are directed to intercept with short-term current pulses to increase the magnetic force. However, it is difficult to weaken movements in the switching direction of the switching valve.
  • the object of the invention is therefore to provide an electromagnetic switching valve in which noise development can be reduced to a minimum in all operating points.
  • a high-pressure fuel pump having such an electromagnetic switching valve is the subject of the independent claim.
  • An electromagnetic switching valve for a fuel injection system of an internal combustion engine has a valve area with a closing element for closing the switching valve and an actuator area for moving the closing element along an axis of movement.
  • the actuator region comprises an armature movable along the movement axis, which is coupled to the closing element for moving the closing element, a fixed pole piece and a solenoid for generating a magnetic flux in the armature and the pole piece.
  • the armature has a magnetic flux concentration range in which a magnetic flux is saturable and which is formed in that an armature outer circumference has a shoulder, so that the armature has a smaller, first armature outer circumference and a larger, second armature outer circumference, the first armature outer circumference at most 3/4 of the second outer circumference of the anchor (U A2 ).
  • the first outer circumference of the anchor is essentially half of a total length of the anchor along the movement axis.
  • the armature and the pole piece are arranged adjacent to one another, the region of the armature with the first outer circumference of the armature being arranged facing the pole piece.
  • the shoulder in the armature is arranged at a defined height and with a defined diameter and a defined length in order to be able to achieve a defined magnetic flux concentration in the armature.
  • the constriction not only achieves a magnetic flux concentration in the armature, but also reduces the overall mass of the armature.
  • the desired magnetic force is achieved faster than before, which is accompanied by a reduction in the switching time of the switching valve.
  • the armature is not accelerated so much in the movement phase, although the speed still corresponds to that previously known. Overall, the total switching time is reduced and thus improved.
  • An armature surface and a pole piece surface are preferably located directly opposite one another, the armature surface of the armature in the region of the first outer circumference of the armature being approximately half of the pole piece surface.
  • the pole piece has a constriction in an outer pole piece circumference to form a magnetic flux concentration area.
  • a magnetic flux concentration can also be achieved in the pole piece, which in turn leads to an improved switching time of the switching valve.
  • the constriction is arranged in a half of the pole piece facing the armature, the constriction being in particular at least 1/5 of a total length of the pole piece along the axis of movement.
  • the outer circumference of the pole piece is preferably reduced by at least 1/4 in the region of the constriction.
  • the constriction is arranged at a defined height in the pole piece and with a defined diameter and a defined length in order to be able to achieve a defined magnetic flux concentration in the pole piece.
  • the constriction of the pole piece along the movement axis is particularly advantageously located at the level of a spring recess of a return spring between the pole piece and the armature.
  • the constriction along the axis of movement is also advantageously at the level of the solenoid.
  • a high-pressure fuel pump for a fuel injection system of an internal combustion engine advantageously has an electromagnetic switching valve described above.
  • the switching valve can be formed, for example, as an inlet valve for the high-pressure fuel pump or as an outlet valve. However, it is also possible to provide the switching valve described as a pressure control valve which is arranged, for example, on a common rail of a fuel injection system.
  • Fig. 1 shows a schematic overview of a fuel injection system 10 of an internal combustion engine, which delivers a fuel 12 from a tank 14 via a prefeed pump 16, a high-pressure fuel pump 18 and a high-pressure fuel reservoir 20 to injectors 22, which then inject the fuel 12 into combustion chambers of the internal combustion engine.
  • the fuel 12 is introduced into the high-pressure fuel pump 18 via an inlet valve 24, is let out of the high-pressure fuel pump 18 via an outlet valve 26, and is then fed to the high-pressure fuel accumulator 20.
  • a pressure control valve 28 is arranged on the high-pressure fuel reservoir 20 in order to be able to regulate the pressure of the fuel 12 in the high-pressure fuel reservoir 20.
  • Both the inlet valve 24 and the outlet valve 26, as well as the pressure control valve 28 can be designed as electromagnetic switching valves 30 and can therefore be operated actively.
  • Fig. 2 shows a first embodiment of such an electromagnetic switching valve 30 in a longitudinal sectional view through the electromagnetic switching valve 30, which is designed as an inlet valve 24 of a high-pressure fuel pump 18.
  • the electromagnetic switching valve 30 is arranged in a housing bore 32 of a housing 34 of the high-pressure fuel pump 18.
  • the electromagnetic switching valve 30 has a valve region 36 and an actuator region 38, the actuator region 38 having a fixed pole piece 40 and an armature 44 movable along an axis of movement 42.
  • the valve region 36 comprises a valve seat 46 and a closing element 48, which cooperate to close the electromagnetic switching valve 30.
  • the pole piece 40 and the armature 44 are received together in a sleeve 50, although this need not necessarily be the case.
  • a solenoid 52 is pushed onto the sleeve 50 and is thus arranged around the pole piece 40 and the armature 44 in the electromagnetic switching valve 30.
  • the armature 44 and the pole piece 40 are arranged directly adjacent to one another, so that an armature surface 54 and a pole piece surface 56 lie directly opposite one another.
  • a return spring 58 is arranged between the armature 44 and the pole piece 40 in order to keep the armature 44 and the pole piece 40 at a distance and thus to produce an air gap 60.
  • the armature 44 is coupled to an actuating pin 62 which, in operation, moves with the armature 44 along the movement axis 42.
  • the actuating pin 62 presses the closing element 48 away from the valve seat 46 or has no contact with the closing element 48, so that the latter is different from the opposite one A force acts to move the valve seat 46 and thus the switching valve 30 can close.
  • the solenoid 42 In the energized state of the electromagnetic switching valve 30, the solenoid 42 generates a magnetic field in the electromagnetic switching valve 30, which in Fig. 3 is represented by magnetic field lines 64.
  • the magnetic flux of the magnetic field lines 64 is arranged in all metallic / magnetic elements directly adjacent to the solenoid 52, in particular in the pole piece 40 and in the armature 44. This creates a magnetic attraction between the pole piece 40 and armature 44, and the Anchor 44 is pulled with its anchor surface 54 in the direction of pole piece surface 56 of pole piece 40.
  • the armature 44 takes the actuating pin 62 with it, so that it loses contact with the closing element 48, and the closing element 48 can thus return to the valve seat 46.
  • the return spring 58 pushes the armature 44 away from the pole piece 40 again, since a return force of the return spring 58 acts counter to the magnetic force.
  • the air gap 60 is maximally pressed and the actuating pin 62 is pressed onto the closing element 48 again, so that the closing element 48 lifts off the valve seat 46 and the electromagnetic switching valve 30 opens.
  • the armature 44 has a magnetic flux concentration area 66, that is to say an area in which the magnetic field lines are guided through the armature 44 on a reduced cross-sectional area, so that they have to concentrate.
  • the magnetic flux concentration region 66 is formed in that an armature outer circumference UA has a shoulder 68, so that a first armature outer circumference UA1 and a second armature outer circumference U A2 are formed which are different from one another, the first armature outer circumference UA1 being smaller than the second armature outer circumference U A2 .
  • the armature 44 has the first outer armature circumference UA1 in the region in which the armature 44 is assigned directly adjacent to the pole piece 40, that is to say at its upper end region 70.
  • the first outer anchor circumference UA1 is a maximum of 3/4 of the second outer anchor circumference UA2.
  • a length of the first outer circumference of the anchor UA1 along the movement axis 42 is essentially half of a total length LA of the anchor 44.
  • This arrangement of the reduced first armature outer circumference UA1 can produce a targeted magnetic throttle in the armature 44 in order to achieve the advantages described above.
  • the course of the magnetic field lines 64 is shown in FIG Fig. 3 where it can be seen that the magnetic field lines 64 are concentrated in the region in which the outer circumference of the armature UA is reduced, so that the overall magnetic flux is concentrated here.
  • armature surface 54 which faces the pole piece 40, is smaller at the upper end region 70 than the pole piece surface 56, which is arranged towards the armature 44.
  • the anchor surface 54 makes up about half of the pole piece surface 56.
  • the two opposing surfaces namely the armature surface 54 and the pole piece surface 56, are the surfaces that generate the magnetic force between armature 44 and pole piece 40.
  • Fig. 4 and Fig. 5 show an example of the electromagnetic switching valve 30 in which the magnetic throttle is provided in the armature 44 not in the armature 44 as in the first embodiment but in the pole piece 40 by providing the magnetic flux concentration region 66.
  • both the armature 44 and the pole piece 40 each form a magnetic flux concentration region 66 and thus a magnetic choke.
  • a magnetic flux concentration region 66 in the second embodiment is formed by a constriction 72 in the pole piece 40, so that an outer pole piece circumference UP, which is otherwise constant via the movement axis 42, is reduced in the region of the constriction 72.
  • the constriction 72 is arranged in a half 74 of the pole piece 40, which is arranged facing the armature 44, but not, as in the armature 44 in the first embodiment, on one End region, but spaced apart from a pole piece end region 76. It is thereby achieved that, where the pole piece surface 56 is adjacent to the armature surface 54, the maximum magnetic force can act from the pole piece 40 on the armature 44 in order to pull the armature 44 in the direction of the pole piece 40.
  • the constriction 72 has a length which corresponds to at least 1/5 a length LP of the pole piece 40 along the movement axis 42.
  • the outer pole piece circumference UP is reduced in the region of the constriction 72 by at least 1/4 compared to the constant outer pole piece circumference UP outside the constriction 72.
  • the return spring 58 is arranged so that it is supported within the pole piece 40.
  • the pole piece 40 has a through bore 78 which widens in a lower pole piece end region 78, which is arranged facing the armature 44, in order to form a spring recess 82.
  • the spring recess 82 is defined by side walls 84 of the through bore 78 and by support walls 68, which are formed by the expansion of the through bore 78 in the pole piece end region 78. The return spring 58 is then supported on these support walls 68.
  • the constriction 72 is formed along the movement axis 42 at the level of the spring recess 82, in particular in such a way that it does not protrude beyond the spring recess 82.
  • the magnetic flux concentration can be achieved in particular in the area of the return spring 58, that is, where the return force of the return spring 58 also acts.
  • constriction 72 is advantageously also at the level of the solenoid 52 along the movement axis 42.
  • Fig. 5 the course of the magnetic field lines 64 is shown in the pole piece 40, it being possible to see that the magnetic field lines 64 are concentrated in the region of the constriction 72, and thus a magnetic flux concentration can be generated in the pole piece 40.
  • the magnetic choke generated in the armature 44 with reference to the first embodiment can thus also be generated in the pole piece 40.
  • Fig. 6 shows a diagram that represents the magnetic force generated by the solenoid 52 or the magnetic flux acting in the armature 44 or the pole piece 40 against the magnetic excitation by the solenoid 52.
  • the dashed lines correspond to the acting magnetic force in a known arrangement in which the armature 44 or the pole piece 40 have no magnetic flux concentration region 66.
  • the solid lines show the effective magnetic force when the armature 44 or the pole piece 40 is formed with a magnetic flux concentration.
  • the horizontal line in the diagram shows the magnetic force to be generated by the solenoid 52, which is necessary to overpress the restoring force of the restoring spring 58 so that the armature 44 starts to move.
  • the diagram therefore shows a portion of a hysteresis that occurs when the switching valve 30 is operating.
  • the magnetic force is reduced by the magnetic choke, however, this can be compensated for by corresponding winding parameters in the solenoid 52 if there is a need here. It would also be possible to readjust this via the electrical resistance that influences the current in the solenoids 52.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Soupape de commande électromagnétique (30) pour un système d'injection de carburant (10) d'un moteur à combustion interne, présentant :
    - une zone de soupape (36) avec un élément de fermeture (48) pour fermer la soupape de commande (30) ; et
    - une zone d'actionneur (38) pour déplacer l'élément de fermeture (48) le long d'un axe de déplacement (42) ;
    la zone d'actionneur (38) présentant une ancre (44) mobile dans le sens de l'axe de déplacement (42), laquelle est accouplée à l'élément de fermeture (48) pour le déplacement de l'élément de fermeture (48), une pièce polaire fixe (40) et un solénoïde (52) pour la génération d'un flux magnétique dans l'ancre (44) et dans la pièce polaire (40), l'ancre (44) présentant une zone de concentration de flux magnétique (66) dans laquelle un flux magnétique est saturable et laquelle est formée par le fait que une circonférence extérieure d'ancre (UA) présente un rebord (68), de telle sorte que l'ancre (44) présente une première circonférence extérieure d'ancre (UA1) et une deuxième circonférence extérieure d'ancre (UA2), la première circonférence extérieure d'ancre (UA1) étant inférieure à la deuxième circonférence extérieure d'ancre (UA2) et s'élevant au maximum à 3/4 de la deuxième circonférence extérieure d'ancre (UA2).
  2. Soupape de commande électromagnétique (30) selon la revendication 1, caractérisée en ce que la première circonférence extérieure d'ancre (UA1) s'élève essentiellement à la moitié (74) d'une longueur totale (LA) de l'ancre (44), dans le sens de l'axe de déplacement (42).
  3. Soupape de commande électromagnétique (30) selon l'une des revendications 1 à 2, caractérisée en ce que l'ancre (44) et la pièce polaire (40) sont disposées de façon voisine l'une de l'autre, la zone de l'ancre (44) avec la première circonférence extérieure d'ancre (UA1) étant orientée vers la pièce polaire (40).
  4. Soupape de commande électromagnétique (30) selon la revendication 3, caractérisée en ce qu'une surface d'ancre (54) et une surface de pièce polaire (56) se font directement face, la surface d'ancre (54) de l'ancre (44) dans la zone de la première circonférence extérieure d'ancre (UA1) s'élevant à environ la moitié (74) de la surface de pièce polaire (56).
  5. Soupape de commande électromagnétique (30) selon l'une des revendications 1 à 4, caractérisée en ce que la pièce polaire (40) présente un étranglement (72) dans une circonférence extérieure de pièce polaire (UP) pour la formation d'une zone de concentration de flux magnétique (66).
  6. Soupape de commande électromagnétique (30) selon la revendication 5, caractérisée en ce que l'étranglement (72) est situé dans une moitié (74) de la pièce polaire (40) orientée vers l'ancre (44), l'étranglement (72) s'élevant en particulier à au moins 1/5 d'une longueur totale (Lp) de la pièce polaire (40) dans le sens de l'axe de déplacement (42), la circonférence extérieure de pièce polaire (UP) étant en particulier réduite d'au moins 1/4 dans la zone de l'étranglement (72).
  7. Pompe haute pression à carburant (18) pour un système d'injection de carburant (10) d'un moteur à combustion interne, présentant une soupape de commande électromagnétique (30) selon l'une des revendications 1 à 6.
EP17156169.9A 2017-02-15 2017-02-15 Soupape de commutation électromagnétique et pompe haute pression à carburant Active EP3364015B8 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP17156169.9A EP3364015B8 (fr) 2017-02-15 2017-02-15 Soupape de commutation électromagnétique et pompe haute pression à carburant
KR1020170165480A KR102017955B1 (ko) 2017-02-15 2017-12-04 전자기 스위칭 밸브 및 고압 연료 펌프
CN201810149415.3A CN108425775B (zh) 2017-02-15 2018-02-13 电磁的开关阀和燃料高压泵
JP2018023926A JP6542405B2 (ja) 2017-02-15 2018-02-14 電磁切換弁および高圧燃料ポンプ
US15/897,398 US20180230955A1 (en) 2017-02-15 2018-02-15 Electromagnetic Switching Valve and High-Pressure Fuel Pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17156169.9A EP3364015B8 (fr) 2017-02-15 2017-02-15 Soupape de commutation électromagnétique et pompe haute pression à carburant

Publications (3)

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EP3364015A1 EP3364015A1 (fr) 2018-08-22
EP3364015B1 true EP3364015B1 (fr) 2020-04-08
EP3364015B8 EP3364015B8 (fr) 2020-06-03

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EP (1) EP3364015B8 (fr)
JP (1) JP6542405B2 (fr)
KR (1) KR102017955B1 (fr)
CN (1) CN108425775B (fr)

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US10947880B2 (en) * 2018-02-01 2021-03-16 Continental Powertrain USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly
US10683825B1 (en) 2018-12-04 2020-06-16 Delphi Technologies Ip Limited Fuel pump and inlet valve assembly thereof
JP7115328B2 (ja) * 2019-01-15 2022-08-09 株式会社デンソー 電磁弁

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JPS6436776U (fr) * 1987-08-28 1989-03-06
JP3666246B2 (ja) * 1998-05-25 2005-06-29 Ｎｏｋ株式会社 ソレノイドバルブ
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Also Published As

Publication number Publication date
EP3364015A1 (fr) 2018-08-22
KR20180094472A (ko) 2018-08-23
CN108425775A (zh) 2018-08-21
US20180230955A1 (en) 2018-08-16
JP2018135882A (ja) 2018-08-30
EP3364015B8 (fr) 2020-06-03
KR102017955B1 (ko) 2019-09-03
CN108425775B (zh) 2020-09-15
JP6542405B2 (ja) 2019-07-10

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