EP1339973B1 - Zerstäuberscheibe und brennstoffeinspritzventil mit einer zerstäuberscheibe - Google Patents

Zerstäuberscheibe und brennstoffeinspritzventil mit einer zerstäuberscheibe Download PDF

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Publication number
EP1339973B1
EP1339973B1 EP01995551A EP01995551A EP1339973B1 EP 1339973 B1 EP1339973 B1 EP 1339973B1 EP 01995551 A EP01995551 A EP 01995551A EP 01995551 A EP01995551 A EP 01995551A EP 1339973 B1 EP1339973 B1 EP 1339973B1
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EP
European Patent Office
Prior art keywords
atomizing disc
fuel injection
disc
injection valve
atomizing
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.)
Expired - Lifetime
Application number
EP01995551A
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German (de)
English (en)
French (fr)
Other versions
EP1339973A1 (de
Inventor
Wolfgang Dressler
Joerg Heyse
Horst Boeder
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1339973A1 publication Critical patent/EP1339973A1/de
Application granted granted Critical
Publication of EP1339973B1 publication Critical patent/EP1339973B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F02M61/184—Discharge orifices having non circular sections
    • 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
    • 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
    • F02M61/1853—Orifice plates
    • F02M61/186—Multi-layered orifice plates
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the invention relates to an atomizer disk according to the preamble of claim 1 and of a fuel injection valve with a spray disk according to the preamble of claim 11.
  • nozzles and injectors to internal combustion engines but also inkjet printers, nozzles for spraying fluids of any kind or inhalers
  • nozzles for spraying fluids of any kind or inhalers a variety of design variants of atomizer discs are already known. These are usually characterized by at least one inlet and at least one outlet and a certain connection distance between inlet and outlet, which can be very short, for a complete Passage of a fluid.
  • the opening geometries are flow-determining and have a metering function.
  • Targeted contouring for the fuel injection valve, in particular with the use of atomizer disks on fuel injection valves, can achieve the advantages of a high spray quality, uniform atomization and a high variability in jet shapes.
  • a fuel injection valve for fuel injection systems of internal combustion engines with an actuator which also has a movable valve member which cooperates to open and close the valve with a fixed valve seat, and arranged downstream of the valve seat atomizer disk.
  • the atomizer disk has at least one inlet and a plurality of outlet ports, and thus a complete passage for fuel between the inlet and the outlet.
  • a flow rate sensor is integrated upstream of a metering cross-section of the fuel passage in the atomizer disk with local electrically conductive regions provided on the atomizer disk.
  • the material silicon is used for the atomizer disk, wherein the desired structures are introduced in the atomizer disk by etching.
  • Such a silicon atomizer disk has the disadvantage of a possibly insufficient breaking strength, which results from the brittleness of silicon. Especially with continuous loads z. B. at an injection valve (engine vibrations) there is a risk that the silicon plates break.
  • the installation of silicon wafers on metallic components, such as injection valves, is complex because special stress-free clamping solutions must be found and the seal on the valve is problematic. Welding the atomizing disks made of silicon on the injection valve is z. B. not possible.
  • the atomizer disk according to the invention with the characterizing features of claim 1 has the advantage that it has a high functional integration.
  • a particular advantage is that a flow rate sensor is integrated in the atomizer disk, with which a very high variability of the flow rate flowing through the atomizer disk can be set in the flow mode. In this way, the flow through the atomizer disk in flow operation is controllable and actively controlled at any time.
  • composite ceramics produced as a material for the atomizer disk via pyrolysis of filled organosilicon polymers are very corrosion-resistant and wear-resistant, so that a long service life is guaranteed.
  • a first electrically conductive region can be heated with electrical energy, and the temperature of a second electrically conductive region can be influenced by the fluid flow, and thus its electrical resistance can be changed. In this way, the flow rate upstream of the metering cross section of the fluid passage in the atomizer disk can be determined.
  • the fuel injection valve according to the invention with the characterizing features of claim 11 has the advantage that a continuous detection of the flow rate in the injection valve during operation of a motor vehicle is possible.
  • the flow can be actively controlled at any time.
  • the flow accuracy of injectors need not, as previously customary, be ensured by accurate geometric dimensions in the metering range, especially in the outlet openings of the fuel injection valve in large quantities. Rather, the flow is controllable and adjustable by the inventive design of the atomizer disk in engine operation. In this way, the manufacturing costs for injectors can be reduced.
  • FIG. 1 shows a partially illustrated fuel injection valve with an atomizer disk in section
  • Figure 2 is a known from DE-OS 196 39 506 atomizer disk in a plan view to 2a to 2c
  • the individual functional levels of the atomizer disk according to Figure 2 Figure 2
  • Figure 3 is a section along the line III-III in Figure 2
  • Figure 4 shows an embodiment of an atomizer disk according to the invention with integrated flow rate sensor in a contour design according to the atomizer disk shown in FIG.
  • the electromagnetically actuated valve exemplified in FIG. 1 in the form of an injection valve for fuel injection systems of mixture-compression, spark-ignition internal combustion engines is particularly suitable as a high-pressure injection valve for injecting fuel directly into a combustion chamber of an internal combustion engine.
  • an injection valve for gasoline or diesel application, for direct or port injection
  • These atomizer discs can also be used in inkjet printers, nozzles for spraying liquids of any kind or inhalers.
  • the injection valve has a tubular valve seat carrier 1 in which a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2.
  • a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2.
  • the actuation of the injection valve takes place in a known manner, for example electromagnetically.
  • a schematically indicated electromagnetic circuit with a solenoid 10, an armature 11 and a core 12.
  • the armature 11 is connected to the valve closing body. 7 opposite end of the valve needle 5 by z. B. a weld by means of a laser and aligned with the core 12.
  • a guide opening 15 of a valve seat body 16 which is mounted in the downstream, the core 12 remote from the end of the valve seat support 1 in the concentric with the valve longitudinal axis 2 extending longitudinal opening 3 by welding.
  • the valve closing body 7 facing away, lower end face 17 of the valve seat body 16 with a z.
  • pot-shaped disk carrier 21 concentrically and firmly connected, which thus rests at least with an outer ring portion 22 directly to the valve seat body 16.
  • the disk carrier 21 in this case has a similar shape to that already known cup-shaped spray perforated disks, wherein a central region of the disk carrier 21 is provided with a passage opening 20 without Zumessfunktion.
  • An atomizer disk 23 according to the invention is arranged upstream of the passage opening 20 such that it completely covers the passage opening 20.
  • the disk carrier 21 is designed with a bottom part 24 and a retaining edge 26.
  • the retaining edge 26 extends in the axial direction facing away from the valve seat body 16 and is bent conically outward to its end.
  • the connection of valve seat body 16 and disc carrier 21st The disk carrier 21 is in the region of the retaining edge 26 further connected to the wall of the longitudinal opening 3 in the valve seat carrier 1, for example, by a circumferential and dense second weld 30.
  • a disk region 33 having this smaller diameter protrudes into a downstream valve seat surface 29 cylindrical outlet opening 31 of the valve seat body 16 dimensionally accurate.
  • the radially projecting and thus clampable base region 32 of the atomizer disk 23 bears against the lower end face 17 of the valve seat body 16.
  • the atomizer disk 23 comprises, forms a lower functional level, the base area 32 alone.
  • a functional level should have a largely constant opening contour over its axial extent.
  • the insertion depth of the consisting of valve seat body 16, cup-shaped disk carrier 21 and atomizer 23 valve seat portion in the longitudinal opening 3 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 at non-energized solenoid 10 by the system of the valve closing body 7 on the valve seat surface 29th of the valve seat body 16 is fixed.
  • the other end position of the valve needle 5 is at energized solenoid 10, for example, by the system of the armature 11 to the core 12 set.
  • the path between these two end positions of the valve needle 5 thus represents the stroke.
  • the spherical valve closing body 7 interacts with the valve seat surface 29 of the valve seat body 16 which tapers in the shape of a truncated cone.
  • the insertion of the atomizer disk 23 with a disk carrier 21 and a clamp as attachment is only one possible variant of attaching the atomizer disk 23.
  • Such a clamping as indirect attachment of the atomizer disk 23 on the valve seat body 16 has the advantage that temperature-induced deformations are avoided, possibly at Methods such as welding or soldering could occur in a direct attachment of the atomizer disk 23.
  • the disk carrier 21 is by no means an exclusive condition for fixing the atomizing disk 23.
  • FIG. 2 shows a known from DE-OS 196 39 506 atomizer disc in a plan view to illustrate and explain a possible shape of the atomizer disk according to the invention 23.
  • the perforated disc 23 is designed as a flat, circular member having a plurality, for example, three axially successive functional levels , FIG. 3, which is a sectional view along a line III-III in FIG. 2, illustrates the structure of the perforated disk 23 with its three functional planes.
  • the upper functional level 37 has, for example, an inlet opening 40 with the largest possible circumference, which has a contour similar to a stylized bat (or a double H).
  • the inlet opening 40 has a cross-section, which is a partially rounded rectangle with two opposite, rectangular constrictions 45 and three over the constrictions 45 overstanding inlet regions 46 can be described.
  • z. B. in each case the same distance from the central axis of the atomizer disk 23 and these are arranged symmetrically, for example, four rectangular outlet openings 42 are provided in the lower functional level 35.
  • the outlet openings 42 lie largely in the constrictions 45 of the upper functional plane 37.
  • the outlet openings 42 are at an offset from the inlet opening 40, ie. H. in the projection, the inlet opening 40 will not cover the outlet openings 42 at any point.
  • a channel 41 (cavity) is formed in the middle functional plane 36.
  • the contour of a rounded rectangle having channel 41 has a size such that it completely covers the inlet opening 40 in the projection. Since the channel 41 also covers the four outlet openings 42, they can be flown in from all sides.
  • FIGS. 2 a, 2 b and 2 c the functional planes 37, 36 and 35 are once again shown in isolation to precisely recognize the opening contour of each individual functional plane 37, 36 and 35.
  • Each individual figure is ultimately a simplified sectional view horizontally along each functional plane 37, 36 and 35.
  • the outlet openings 42 Due to the already mentioned offset of the outlet openings 42 with respect to the at least one inlet opening 40 results in an S-shaped flow pattern of the medium, for example of the fuel. Obtained by the radially extending channel 41 the medium is a radial velocity component. Due to the so-called S-impact within the atomizer disk 23 with several strong flow deflections, the flow is imparted with a strong, atomization-promoting turbulence. The velocity gradient across the flow is thus particularly pronounced. The increased shear stresses in the fluid resulting from the speed differences favor decay into fine droplets near the outlet ports 42.
  • OBD On Board Diagnostic
  • the electronic monitoring of the functionality of exhaust-relevant components of a motor vehicle will be realized in the future.
  • a quantity to be monitored represents the amount of fuel sprayed per opening stroke of the valve needle 5.
  • a microstructured atomizing disk 23 is proposed which has a flow rate sensor with which an active control of the amount of fuel sprayed off is possible over the duration of the injection valve activation pulse.
  • FIG. 4 shows an exemplary embodiment of an atomizer disk 23 according to the invention with an integrated flow rate sensor, but otherwise with the exemplary contouring described above.
  • the atomizer disk 23 is made of ceramic material, for example.
  • electrically conductive regions 50, 51 are selectively introduced by locally introduced conductivity in the material.
  • the electrically conductive regions 50, 51 are in the lower functional plane 35, ie in the lower one Ceramic layer arranged.
  • the conductive regions 50, 51 terminate in contacting surfaces 50 ', 51'.
  • the atomizer disk 23 is fastened to the fuel injection valve in such a way that these contacting surfaces 50 ', 51' come into contact with corresponding connection contacts, not shown, of the injection valve.
  • the measuring and control signals which are supplied to the flow rate sensor and removed, for example, can be processed in a control unit external to the injector.
  • each case two electrically conductive strips 150, 151 run on the circumference of each individual outlet opening 42. These strips 150, 151 as part of the electrically conductive regions 50, 51 have a small relative distance from one another.
  • the outlet openings 42 are arranged so that they can be flown from all sides of the channel 41. The flow thus cuts the strips 150, 151 approximately at right angles before entering the outlet openings 42.
  • the contact strip 50 'contacted strip 150 is heated with defined electrical energy.
  • the fuel flow heated thereby downstream of this strip 150 subsequently comes in contact with the conductive strip 151 which is connected to the contacting surfaces 51 '.
  • the heated fuel flow affects the temperature of the strip 151, thereby changing its electrical resistance.
  • the instantaneous flow rate can be determined by means of an evaluation circuit.
  • the flow rate of the injectors can thus be detected continuously. To this The flow can be controlled and actively regulated at any time.
  • the flow rate measurement principle on an atomizer disk is not limited to the atomizer disk 23 described in more detail with an offset of inlet port 40 and outlet ports 42, but quite different types of atomizer disks can be used for such purposes. Swirl disks. It is important, however, that the flow rate sensor is always arranged upstream of the metering cross section in its immediate vicinity.
  • composite ceramics prepared by pyrolysis of filled organosilicon polymers are preferably used, as e.g. already known from EP 0 412 428 B1 or DE 195 38 695 A1.
  • the electrical resistance of the composite ceramic can be adjusted via the type and quantity of filler.
  • Microstructured sputter disks 23 can be produced by means of hot stamping and joining of incompletely cured moldings or by joining in the pyrolyzed state or by means of injection molding or transfer molding with lost molds.
  • the electrically conductive regions 50, 51 including the strips 150, 151 are applied to the lower functional level 35, a ceramic base plate 32, 55 of the atomizing disk 23, either by doctoring or screen printing or by micro injection molding or transfer molding or two-layer composites of a non-conductive Substrate and a conductive thin layer produced by cold pressing and subsequent laser structuring.
  • the substrate that is the Ceramic base plate 32, 55 injected and cured.
  • the electrical regions 50, 51 are generated in a second injection process.
  • the upper functional planes 36, 37 of the atomizing disk 23 are molded onto the ceramic base plate 55 provided with the electrical regions 50, 51 by using lost molds.
  • structuring of the later strips 150, 151 can take place by laser ablation (evaporation of the material at locations where no conductive regions 50, 51 are to be formed).
  • laser ablation evaporation of the material at locations where no conductive regions 50, 51 are to be formed.
  • partial pyrolysis at the locations of the later strips 150, 151 with subsequent etching of the remaining Leitverbundcompounds structuring of the strips 150, 151 done.
  • the parts thus produced are pyrolyzed as described in EP 0 412 428 B1.
  • nonconductive (base plate 32, 55) and conductive (strip 150, 151, contacting surfaces 50 ', 51') composite ceramic with respect to pyrolysis and thermal expansion coefficients are matched to prevent cracking during the pyrolysis process.

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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)
EP01995551A 2000-12-01 2001-11-30 Zerstäuberscheibe und brennstoffeinspritzventil mit einer zerstäuberscheibe Expired - Lifetime EP1339973B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10059682 2000-12-01
DE10059682A DE10059682A1 (de) 2000-12-01 2000-12-01 Zerstäuberscheibe und Brennstoffeinspritzventil mit einer Zerstäuberscheibe
PCT/DE2001/004502 WO2002044553A1 (de) 2000-12-01 2001-11-30 Zerstäuberscheibe und brennstoffeinspritzventil mit einer zerstäuberscheibe

Publications (2)

Publication Number Publication Date
EP1339973A1 EP1339973A1 (de) 2003-09-03
EP1339973B1 true EP1339973B1 (de) 2006-11-15

Family

ID=7665385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01995551A Expired - Lifetime EP1339973B1 (de) 2000-12-01 2001-11-30 Zerstäuberscheibe und brennstoffeinspritzventil mit einer zerstäuberscheibe

Country Status (9)

Country Link
US (1) US20030122000A1 (pt)
EP (1) EP1339973B1 (pt)
JP (1) JP2004514836A (pt)
KR (1) KR20020074225A (pt)
CN (1) CN1419631A (pt)
BR (1) BR0108045A (pt)
CZ (1) CZ20022623A3 (pt)
DE (2) DE10059682A1 (pt)
WO (1) WO2002044553A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4069452B2 (ja) * 2002-12-17 2008-04-02 株式会社デンソー 燃料噴射装置
DE102004032229B3 (de) * 2004-07-02 2006-01-05 Compact Dynamics Gmbh Brennstoff-Einspritzventil
DE102005023793B4 (de) * 2005-05-19 2012-01-12 Ulrich Schmid Vorrichtung zur Drallerzeugung in einem Kraftstoffeinspritzventil
DE102007062187A1 (de) * 2007-12-21 2009-06-25 Robert Bosch Gmbh Brennstoffeinspritzventil
JP2014009653A (ja) * 2012-07-02 2014-01-20 Mitsubishi Electric Corp 燃料噴射弁

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907748A (en) * 1988-08-12 1990-03-13 Ford Motor Company Fuel injector with silicon nozzle
DE3926077A1 (de) * 1989-08-07 1991-02-14 Peter Prof Dr Greil Keramische verbundkoerper und verfahren zu ihrer herstellung
DE19538695C2 (de) * 1994-10-19 2003-05-28 Bosch Gmbh Robert Keramischer elektrischer Widerstand und dessen Verwendung
US5716001A (en) * 1995-08-09 1998-02-10 Siemens Automotive Corporation Flow indicating injector nozzle
DE19639506A1 (de) * 1996-09-26 1998-04-02 Bosch Gmbh Robert Lochscheibe und Ventil mit einer Lochscheibe
US6330981B1 (en) * 1999-03-01 2001-12-18 Siemens Automotive Corporation Fuel injector with turbulence generator for fuel orifice
US6357677B1 (en) * 1999-10-13 2002-03-19 Siemens Automotive Corporation Fuel injection valve with multiple nozzle plates

Also Published As

Publication number Publication date
DE10059682A1 (de) 2002-06-06
WO2002044553A1 (de) 2002-06-06
JP2004514836A (ja) 2004-05-20
US20030122000A1 (en) 2003-07-03
CZ20022623A3 (cs) 2004-01-14
CN1419631A (zh) 2003-05-21
KR20020074225A (ko) 2002-09-28
DE50111471D1 (de) 2006-12-28
BR0108045A (pt) 2003-06-17
EP1339973A1 (de) 2003-09-03

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