Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
  • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
  • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
  • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
  • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
• • 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
  • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
• • 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
  • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
  • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
  • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
  • F02M45/08—Injectors peculiar thereto
  • F02M45/086—Having more than one injection-valve controlling discharge orifices
• • 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
• • 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
  • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
• • 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
  • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
• • 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
  • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
  • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
  • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
• • 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
  • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
  • F02M61/188—Spherical or partly spherical shaped valve member ends
• • 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
  • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
• • 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
  • F02B75/00—Other engines
  • F02B75/12—Other methods of operation
  • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in 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
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
  • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/10—Internal combustion engine [ICE] based vehicles
  • Y02T10/12—Improving ICE efficiencies

Definitions

• the invention is based on a fuel injection valve according to the preamble of the main claim.
• an electromagnetically actuated fuel injection valve in which an armature interacts with an electrically excitable solenoid for electromagnetic actuation and the stroke of the armature is transmitted to a valve closing body via a valve needle.
• the valve closing body interacts with a valve seat surface to form a sealing seat.
• the armature is not rigidly attached to the valve needle, but is arranged axially movable thereon.
• a first return spring acts on the valve needle in the closing direction and thus keeps the fuel injection valve closed when the solenoid coil is de-energized and not energized.
• the armature is acted upon in the stroke direction by means of a second puck spring so that the armature in the rest position rests against a first stop provided on the valve needle.
• a disadvantage of the fuel injection valve known from DE 33 14 899 AI is in particular the incomplete debouncing. If the armature hits the stop of the valve needle, this can cause the valve closing body connected to the valve needle to be briefly lifted again from the valve seat and thus to an undesired brief opening of the fuel injection valve, which falsifies the spray pattern and increases the amount of fuel injected, which in turn leads to a This results in higher fuel consumption and increased knocking of the internal combustion engine due to afterburning.
• Damping element is prevented without having to increase the spring constant of the return spring and thereby having to buy longer opening times. Furthermore, a multi-hole concept can be implemented in a simple manner, without restrictions, for example when using standard components.
• the low-cost and easy-to-manufacture cylindrical shape of the damping element made of any elastic material, for example rubber, silicone or foam, or the design of the damping element as a liquid cushion enclosed by a sheath is particularly advantageous.
• the damping element in the form of a spring connected to a damping body, which is arranged in the recess of the valve closing body.
• the damping body which oscillates freely when the fuel injector is open can also consist of metal, since the damping effect is achieved by the spring.
• the cost-effective production which makes no special demands on the material of the damping element, is particularly advantageous. drawing
• FIG. 1 shows an axial section through a first exemplary embodiment of a fuel injection valve according to the invention
• FIG. 2A shows an enlarged detail of FIG. 1, the first exemplary embodiment of a fuel injection valve according to the invention in the area IIA in FIG. 1,
• FIG. 2B em second exemplary embodiment of a fuel injection valve according to the invention in the same area as Fig. 2A, and
• FIG. 2C em third exemplary embodiment of a fuel injection valve according to the invention in the same area as Fig. 2A and 2B.
• the fuel injection valve 1 is in the form of a fuel injection valve for fuel injection systems of mixture-compressing, externally ignited
• Fuel injection valve 1 is particularly suitable for dxrect injection of fuel a combustion chamber, not shown, of an internal combustion engine.
• the fuel injection valve 1 comprises a nozzle body 2, in which a valve needle 3 is arranged.
• the valve needle 3 is in operative connection with a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat 7 has.
• the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic circuit.
• a magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12 which bears against an inner pole 13 of the magnetic circuit.
• the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connection component 29.
• the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
• the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
• valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
• a paired adjusting disk 15 is used for stroke adjustment.
• An armature 20 is located on the other side of the adjusting disk 15.
• This anchor is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
• a restoring spring 23 is supported on the first flange 21, which in the present design of the fuel injection valve 1 is preloaded by a sleeve 24
• the spherical valve closing body 4 has at least one bevel 34, via which the fuel flows around the valve closing body 4 and is led to the spray openings 7.
• the fuel is supplied via a central fuel supply 16 and filtered through em filter element 25.
• the fuel injection valve 1 is sealed by a seal 28 against a fuel line, not shown.
• the valve closing body 4 has a recess 36 on an injection-side end 35, which is preferably cylindrical or pot-shaped.
• damping element 37 is arranged, which abspr tzse tig is supported on the valve seat 5.
• the damping element 37 is arranged in such a way that it rests on the valve seat body 5 within the spray openings 7 formed in the valve seat body 5.
• the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in a sealing arrangement on the valve seat 6.
• this magnetic field builds up, which moves the armature 20 counter to the spring force of the return spring 23 m in the stroke direction, the stroke being predetermined by a working gap 27 between the inner pole 13 and the armature 20 in the rest position.
• the armature 20 also carries the flange 21, which is welded to the valve needle 3, in the stroke direction. The one with the Valve needle 3 Actively connected valve closing body 4 lifts off the valve seat surface 6 and the fuel is sprayed off.
• the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the flange 21, which is operatively connected to the valve needle 3 m, moves counter to the stroke direction.
• the valve needle 3 is thereby moved in the same direction, as a result of which the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed.
• a rebound of the valve closing body 4 from the valve seat body 5 is prevented by the damping element 37, which absorbs the kinetic energy of the valve needle 3.
• FIG. 2A shows an excerpted sectional view of the area marked IIA in FIG. 1. Matching components are provided with matching reference numerals for easier orientation.
• the valve closing body 4 of the fuel injection valve 1 designed according to the invention has an almost spherical shape. This results in an offset-free, cardanic valve needle guidance, which ensures that the fuel injection valve 1 functions exactly. This is particularly important with regard to the prevention of bouncing by the damping element 37 when the fuel injection valve 1 is closed.
• the valve seat body 5 of the fuel injection valve 1 is almost pot-shaped and contributes to the valve needle guidance through its shape.
• the valve seat body 5 is inserted into an injection-side recess 38 of the nozzle body 2 and is connected to the nozzle body 2 by means of a weld seam 39.
• the valve closing body 4 has at its spray-side end 35 a recess 36 which is cup-shaped or cylindrical and opens in an outflow direction.
• the above-mentioned damping element 37 is arranged in the recess 36. This preferably consists of an elastic rubber or plastic material and is dimensioned such that its axial length is somewhat larger than the axial length of the recess 36 in the valve closing body 4.
• the damping element 37 In the closed state of the fuel injection valve 1, the damping element 37 is compressed by the force of the return spring 23, which keeps the fuel injection valve 1 closed, so that the valve closing body 4 m sealing system is held on the valve seat surface 6 and the damping element 37 m is slightly reduced in its axial length ,
• the valve closing body 4 lifts off the sealing seat, as a result of which fuel flows to the spray openings 7 via the at least one bevel.
• the expansion of the damping element 37 makes an additional contribution during the opening movement for quick opening of the fuel injection valve 1
• the damping element 37 can be fastened in the recess 36 of the valve closing body 4 and thereby also lift off the valve seat body 5 during the further opening movement, but it can also be arranged only loosely in the recess 36 and when the fuel injection valve 1 is opened remain on the valve seat body 5.
• the opening stroke of the fuel injection valve 1 does not exceed the axial length of the damping element 37 in the relaxed state, since otherwise the damping element 37 can slip out of the recess 36.
• the armature 20 drops from the inner pole 13 due to the force of the return spring 23 after sufficient reduction of the magnetic field, as a result of which the valve needle is moved 3 m downstream direction 37 is compressed and thereby exerts a force on the valve closing body 4, which acts counter to the closing direction and brakes the movement of the valve needle 3.
• the valve closing body 4 impinges on the sealing seat at a very low residual speed, as a result of which a further undesired, brief opening of the fuel injection valve 1 is counteracted.
• FIG. 2B shows an excerpted sectional illustration of a second exemplary embodiment of a fuel injection valve 1 designed according to the invention. The detail is the same as that in FIG. 2A. Matching components are provided with matching reference symbols.
• the second exemplary embodiment shown in FIG. 2B has two, in particular, concentric rings 40 of spray openings 7.
• the inner spray openings 7a of an inner ring 40a are closed 1 covered by the damping element 37, while the outer spray openings 7b of an outer ring 40b are arranged analogously to the first exemplary embodiment described in FIG. 2A.
• the damping element 37 can also be designed analogously to the exemplary embodiment described in FIG. 2A, wherein in the present second exemplary embodiment the damping element 37 must be fastened in the recess 36 so that the inner ring 40a is protected from inner spray openings 7a released when the fuel injection valve 1 is opened
• the valve closing body 4 first lifts off the valve seat surface 6, whereby the outer spray openings 7b of the outer ring 40b are released only after passing through a certain stroke, the difference between the axial length of the damping element 37 relaxed state and the corresponds to the axial length of the recess 36, the damping element 37 also lifts off the valve seat body 5, as a result of which the inner spray openings 7a of the inner ring 40a are released
• the fuel cloud injected into the combustion chamber consists only of fuel which was sprayed from the outer spray openings 7b of the outer ring 40b, or that a fuel oil is formed, contains the components both from the inner spray openings 7a of the inner ring 40a and from the outer spray openings 7b of the outer ring 40b
• the outer spray openings 7b of the outer ring 40b are inclined at a small angle with respect to the longitudinal axis 41 of the fuel injection valve 1, in a first switching position of the fuel injection valve 1, when the spray openings 7a of the inner ring 40a are closed, a mixture cloud with a small beam opening angle and high combustion chamber penetration results, as required for the partial load range.
• the inner spray openings 7a of the inner ring 40a are more inclined, so that a fuel cloud m is injected into the combustion chamber for full-load operation when the inner spray openings 7a of the inner ring 40a are open and the outer spray openings 7b of the outer ring 40b are open Has radial component, so that the beam opening angle is larger than in partial load operation and the mixture cloud thus fills the combustion chamber homogeneously.
• This exemplary embodiment thus combines the advantages of avoiding bouncing and thus reducing the scatter of the metered fuel closely with the possibility of modeling the spray pattern depending on the operating state of the fuel injection valve 1.
• FIG. 2C shows a third exemplary embodiment of a fuel injection valve 1 designed according to the invention, which likewise has two rings 40a and 40b of spray openings 7a and 7b.
• the section is again chosen as in FIGS. 2A and 2B; matching components are provided with matching reference numerals.
• the bounce avoidance is achieved by a combination of a damping body 43 and a spring 42, which is arranged between an end face 44 of the recess 36 and the damping body 43 ,
• the combination of spring 42 and damping body 43 forms the damping element 37.
• the spring 42 is biased so that the damping element 37 is flush with the valve closing body 4.
• valve closing body 4 lifts off the sealing seat, as a result of which the outer ring 40b is opened by external spray openings 7b, while the damping body 43 is initially held on the valve seat body 5 under the tension of the spring 42m sealing system.
• the spring 42 is increasingly relaxed until the damping body 43 also lifts off the valve seat body 5 and the inner ring 40a is thereby released from inner spray openings 7a.
• the damping body 43 When the fuel injection valve 1 is closed, the damping body 43 first touches the inner ring 40a of spray openings 7a. From this point in time, the closing movement is braked by the spring 42 arranged in the valve closing body 4, since the restoring force of the spring 42 also increases with increasing spring compression. As a result, bouncers are avoided.
• the invention is not limited to the exemplary embodiments shown and can also be used in particular in fuel injection valves 1 with piezoelectric or magnetostrictive actuators 10 and for any shapes and materials of the damping element 37 and any number of spray openings 7.

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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)
• Fuel-Injection Apparatus (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=7665782

Family Applications (1)

Country Status (6)

Families Citing this family (9)

Family Cites Families (8)

• 2000
  • 2000-12-05 DE DE10060290A patent/DE10060290A1/de not_active Withdrawn
• 2001
  • 2001-11-30 WO PCT/DE2001/004505 patent/WO2002046604A2/de not_active Application Discontinuation
  • 2001-11-30 KR KR1020027009806A patent/KR20020072298A/ko not_active Application Discontinuation
  • 2001-11-30 US US10/203,069 patent/US20030132322A1/en not_active Abandoned
  • 2001-11-30 JP JP2002548306A patent/JP2004515691A/ja active Pending
  • 2001-11-30 EP EP01999741A patent/EP1339970A2/de not_active Withdrawn

Non-Patent Citations (1)

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