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
  • F02M51/0614—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
  • F02M51/0664—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
  • 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
  • F02M61/161—Means for adjusting injection-valve lift
• • 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
  • F02M2200/90—Selection of particular materials
  • F02M2200/9053—Metals
  • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties
• • 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
  • H01F7/16—Rectilinearly-movable armatures
  • H01F7/1607—Armatures entering the winding

Definitions

• the invention relates to a fuel injection valve according to the preamble of the main claim.
• a fuel injection valve which comprises an electromagnetic actuator with a magnetic coil, with an inner pole and with an outer magnetic circuit component and a movable valve closing body which cooperates with a valve seat body associated valve seat comprises.
• the injection valve is from a
• plastic encapsulation Surround plastic encapsulation, wherein the plastic encapsulation extends above all in the axial direction serving as the inner pole connecting piece and the magnetic coil surrounding. At least in the area surrounding the magnetic coil magnetic field lines conductive ferromagnetic fillers are introduced in the plastic sheathing. The fillers surround the solenoid coil in the circumferential direction. The fillers are fine-grained parts of metals with soft magnetic properties. The magnetically embedded in the plastic small
• Metal particles have a more or less globular shape and are magnetically isolated by themselves and thus have no metallic contact with each other, so that there is no effective magnetic field education.
• the positive aspect of a very high electrical resistance which arises in this case is also counteracted by an extremely high magnetic resistance which builds up reflected in a significant loss of power and thus determined in the overall balance negative functional properties.
• Fuel injection valve which is characterized by a relatively compact design.
• the magnetic circuit is formed in this valve by a magnetic coil, a fixed inner pole, a movable armature and an outer magnetic circuit component in the form of a magnet pot.
• several thin-walled valve sleeves are used, which serve both as a connecting piece and as a valve seat carrier and guide portion for the armature. The within the
• Magnetic circuit extending thin-walled non-magnetic sleeve forms an air gap over which the magnetic field lines from the outer magnetic circuit component to the armature and inner pole pass.
• JP 2002-48031 A a fuel injection valve is already known, which is also characterized by a thin-walled sleeve solution, wherein the deep-drawn valve sleeve extends over the entire length of the valve and in the magnetic circuit region has a magnetic separation point in which interrupted the otherwise martensitic structure is.
• Non-magnetic intermediate section is thus at the level of the working air gap between the armature and the inner pole and in relation to
• Magnet coil arranged that the most effective magnetic circuit is created.
• Such a magnetic separation is also used to increase the DFR (dynamic flow rijne) over the known valves with conventional electromagnetic circuits.
• DFR dynamic flow rlinde
• constructions are in turn associated with considerable additional costs in the production.
• non-magnetic sleeve section to a different geometric design to valves without magnetic separation.
• the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage of a particularly compact
• the valve has an extremely small outside diameter, as it is known to experts in the field of intake manifold injection valves for
• Valve sleeve length due to the modular design valve are installed very compatible, without having to accept the resulting deterioration with respect DFR (dynamic flow ranks) and noise.
• the seated on the outer magnetic circuit component and sealing against the wall of the receiving bore on the suction pipe sealing ring is easily displaced.
• the outer diameter D A of the armature is set to 4.0 mm ⁇ D A ⁇ 5.0 mm. From the small outer diameter D A of the armature can result in a particularly light valve needle, so that it can result in the consequence in the operation of the fuel injection valve to significant noise reduction compared to the known intake manifold injection valves. It is particularly advantageous that with the inventive dimensioning of the fuel injection valve and the DFR (dynamic flow ranks) can be significantly increased compared to the conventional injectors DFR usual.
• Figure 1 is an electromagnetically actuated valve in the form of a
• FIG. 2 shows a first embodiment of a valve according to the invention
• Figure 3 shows a second embodiment of a valve according to the invention
• Figure 4 shows a third embodiment of a valve according to the invention as
• FIG. 1 is exemplified an electromagnetically operable valve in the form of a fuel injection valve for fuel injection systems of mixture-compression, spark-ignited internal combustion engines according to the prior art for a better understanding of the invention.
• the valve has a surrounded by a magnetic coil 1, serving as an inner pole and partially as a fuel flow largely tubular core 2.
• the magnetic coil 1 is of an outer, sleeve-shaped and stepped running, z. B. ferromagnetic valve jacket 5, which is an outer pole serving as outer magnetic circuit component, completely surrounded in the circumferential direction.
• the magnetic coil 1, the core 2 and the valve shell 5 together form an electrically excitable actuator. While embedded in a bobbin 3 magnetic coil 1 with a winding 4 surrounds a valve sleeve 6 from the outside, the core 2 in an inner, concentric with a valve longitudinal axis 10 extending opening 11 of
• Valve sleeve 6 introduced.
• the valve sleeve 6 is elongated and thin-walled.
• the opening 11 is used u.a. as a guide opening for a valve needle 14 which is axially movable along the valve longitudinal axis 10.
• the valve sleeve 6 extends in the axial direction, e.g. over approximately half of the total axial extent of the fuel injection valve.
• valve seat body 15 which is attached to the valve sleeve 6, e.g. is fastened by means of a weld 8.
• the valve seat body 15 has a fixed
• Valve seat surface 16 as a valve seat on.
• the valve needle 14 is formed for example by a tubular armature 17, a likewise tubular needle portion 18 and a spherical valve closing body 19, wherein the
• Valve closure body 19 e.g. by means of a weld fixed to the
• Needle portion 18 is connected. At the downstream end of the
• Valve seat body 15 is a e.g. cup-shaped spray orifice plate 21 is arranged, the bent and circumferentially encircling retaining edge 20 is directed against the flow direction upwards.
• Valve seat body 15 and spray disk 21 is z. B. realized by a circumferential tight weld.
• the needle portion 18 of the valve needle 14 one or more transverse openings 22 are provided, so that the fuel flowing through the armature 17 in an inner longitudinal bore 23 to the outside and on the valve closing body 19, for. on flats 24 along to
• Valve seat surface 16 can flow.
• the armature 17 is aligned with the valve closing body 19 facing away from the end of the core 2.
• the core 2 for example, also serving as an inner pole cover part, which closes the magnetic circuit may be provided.
• the spherical valve closing body 19 cooperates with the valve seat surface 16 of the valve seat body 15, which tapers in the direction of the flow in the direction of flow and which is formed in the axial direction downstream of a guide opening in the valve seat body 15.
• the spray disk 21 has at least one, for example four by eroding, laser drilling or punching
• the insertion depth of the core 2 in the injection valve is crucial for the stroke of the valve needle 14.
• the one end position of the valve needle 14 is fixed at non-energized magnetic coil 1 by the system of the valve closing body 19 on the valve seat surface 16 of the valve seat body 15, while the other End position of the valve needle 14 results in energized solenoid coil 1 by the system of the armature 17 at the downstream end of the core.
• the stroke is adjusted by an axial displacement of the core 2, which is subsequently connected according to the desired position fixed to the valve sleeve 6.
• an adjustment in the form of an adjusting sleeve 29 is inserted.
• the adjusting sleeve 29 is used to adjust the spring preload applied to the adjusting sleeve 29 return spring 25, which in turn is supported with its opposite side to the valve needle 14 in the region of the armature 17, wherein an adjustment of the dynamic Abspritzmenge with the adjusting sleeve 29.
• a fuel filter 32 is disposed above the adjusting sleeve 29 in the valve sleeve 6.
• the inlet end of the valve is made of a metal
• Fuel inlet 41 formed by a stabilizing this, protective and surrounding plastic extrusion coating 42 is surrounded.
• a concentric to the valve longitudinal axis 10 extending flow bore 43 of a pipe 44 of the fuel inlet nozzle 41 serves as a fuel inlet.
• the plastic extrusion coating 42 is sprayed, for example, in such a way that the
• FIG. 1 shows a first embodiment of an inventive
• valve sleeve 6 is designed to extend over the entire valve length.
• the outer magnetic circuit component 5 is cup-shaped and can also be referred to as magnet pot.
• the magnetic circuit component 5 has a jacket section 60 and a bottom section 61. At the upstream end of the
• Sheath portion 60 of the outer magnetic circuit member 5 is e.g. a
• Labyrinth seal 46 is provided, with which the seal against the magnetic circuit component 5 surrounding Kunststoffumspritzung 42 is achieved.
• the bottom portion 61 of the magnetic circuit component 5 is characterized for example by a fold 62, so that a double position of the folded
• Magnetic circuit component 5 is present below the magnetic coil 1. With a support ring 64 which is applied to the valve sleeve 6, on the one hand, the folded bottom portion 61 of the magnetic circuit component 5 is held in a defined position. On the other hand, the lower end of an annular groove 65 is defined with the support ring 64, in which a sealing ring 66 is inserted. The upper end of the annular groove 65 is defined by a lower edge of the plastic extrusion coating 42.
• Outer circumference of the outer magnetic circuit component 5 is in the range of
• Jacket section 60 applied directly to the sealing ring 66, so that the fuel injector even with its radially outwardly pushed onto the magnetic circuit sealing ring 66 is still in receiving holes on the intake manifold with an inner diameter of 14 mm can be introduced.
• the sealing ring 66 may in the peripheral region of the outer magnetic circuit component 5 at its largest
• Outer diameter may be provided.
• the internal components such as the core 2 serving as inner pole 2 and the armature 17, must be dimensioned correspondingly above all very small.
• the inner diameter of the two components core 2 and armature 17 define the internal flow area, wherein it has been found that with an inner diameter of 2 mm, the setting of the dynamic injection quantity is still possible with an internal return spring 25, without the tolerance of the inner diameter of the return spring 25 affects the static flow rate.
• different sizes and parameters play an essential role. So it is optimal to minimize the minimum discharge q min as possible.
• the spring force F F > 3 N must be maintained in order to guarantee the current and future required tightness of ⁇ 1.0 mm 3 / min.
• the maximum magnetic force F max is for the design of a
• Fuel injection valve with electromagnetic drive also an essential Size. If F max is too small, for example ⁇ 10 N, this may cause a so-called “closed stuck.” This means that the maximum magnetic force Fmax is too small to overcome the hydraulic adhesive force between the valve closing body 19 and the valve seat surface 16 In that case, that would
• Fuel injector despite energization can not open.
• the new geometry of the fuel injector has therefore above all been determined under the boundary conditions with respect to the quantities q min , F F and F max .
• the outer diameter D A of the armature 17 is a significant size.
• the optimum outer diameter of the armature 17 is 4.0 mm ⁇ D A ⁇ 5.0 mm. From this, the dimensions of the outer magnetic circuit component 5 can be derived, wherein an outer diameter D M of the magnetic circuit component 5 of a maximum of 11 mm, the full functionality of the magnetic circuit even with respect to known injectors significantly increased DFR (dynamic flow ranks) guaranteed.
• DFR dynamic flow ranks
• the optimized dimensioning provides a wall thickness t for the valve sleeve 6 at least in the area of the working air gap, ie in the lower core region and in the upper anchor region, of 0.15 ⁇ t ⁇ 0.35 mm ,
• Valve sleeve 6 is shorter here and extends from the discharge end of the valve only into the region of the solenoid coil 1. Upstream of the movable valve needle 14 with the armature 17, the valve sleeve 6 is fixedly connected to the tubular core 2. This means that a stroke adjustment via a displacement of the core 2 within the valve sleeve 6 is not possible here. At its axially opposite end, the core 2 is in turn connected to a tube 44 of the tube concentric to the valve longitudinal axis 10 Fuel inlet neck 41 attached. In this embodiment, so far over the entire valve length continuous thin-walled valve sleeve 6 is present.
• FIG. 4 shows a third embodiment of a valve according to the invention as a particularly suitable "Extended Tip" version of that shown in FIG.
• Receiving bore on a suction pipe using standard components already known from other injectors are explained.
• Many vehicle or engine manufacturers design the receiving bores for the fuel injection valves in the intake manifold injection in the intake module in a stepped version.
• Injector receiving holes usually have a diameter of about 11 mm. These stepped versions of the mounting holes have prevailed for several reasons. For one, this is for the
• Intake pipe is excluded.
• the stepped receiving bores reduce or avoid tilting of the fuel injection valves. Furthermore, there is an improved flow guidance in the intake manifold for the intake air, since the only approximately 11 mm diameter end portion of the receiving bore due to a smaller circulation area allows a longer homogeneous flow of air in the bore area.
• the fuel injection valves had to be redesigned by all necessary for the forward displacement of the Ab mousseifs components of the fuel injection valve were extended.
• Fuel injection valve before that waiving an extension of components anyway without functional disadvantages has a very deep Abspritzddling by the fuel injector with its entire discharge side functional group incl. Magnetic circuit in a stepped end of the
• the sealing ring 66 can be variably mounted on the magnetic circuit component 5 in its axial position.
• the magnetic circuit member 5 since the skirt portion 60 is cylindrical, the magnetic circuit member 5 does not have a larger outer diameter than 11 mm at any point.
• Outer circumference of the outer magnetic circuit component 5 is in the range of
• Jacket section 60 applied directly to the sealing ring 66, wherein the fuel injection valve even to the support ring 64 on the sealing ring 66 in stepped end portions of the mounting holes on the suction pipe with a
• Inner diameter of 11 mm can be introduced.

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

Applications Claiming Priority (2)

Publications (1)

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ID=44513322

Family Applications (1)

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• 2010
  • 2010-09-16 DE DE102010040916A patent/DE102010040916A1/de active Pending
• 2011
  • 2011-07-26 EP EP11736361.4A patent/EP2616663A1/de not_active Withdrawn
  • 2011-07-26 US US13/822,803 patent/US20140027545A1/en not_active Abandoned
  • 2011-07-26 BR BR112013005956A patent/BR112013005956A2/pt not_active IP Right Cessation
  • 2011-07-26 KR KR1020137006676A patent/KR20130105832A/ko not_active Application Discontinuation
  • 2011-07-26 WO PCT/EP2011/062782 patent/WO2012034755A1/de active Application Filing
  • 2011-07-26 JP JP2013528566A patent/JP5868407B2/ja not_active Expired - Fee Related
  • 2011-07-26 RU RU2013117023/06A patent/RU2572263C2/ru not_active IP Right Cessation
  • 2011-07-26 CN CN201180043937.1A patent/CN103097713B/zh active Active

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