EP0934461B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP0934461B1
EP0934461B1 EP98936192A EP98936192A EP0934461B1 EP 0934461 B1 EP0934461 B1 EP 0934461B1 EP 98936192 A EP98936192 A EP 98936192A EP 98936192 A EP98936192 A EP 98936192A EP 0934461 B1 EP0934461 B1 EP 0934461B1
Authority
EP
European Patent Office
Prior art keywords
gas
fuel injection
injection valve
enclosing
valve
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
EP98936192A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0934461A1 (de
Inventor
Ferdinand Reiter
Heinz-Martin Krause
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0934461A1 publication Critical patent/EP0934461A1/de
Application granted granted Critical
Publication of EP0934461B1 publication Critical patent/EP0934461B1/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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the independent claim 1.
  • a fuel injection valve for injecting a fuel-gas mixture in which a gas enclosing sleeve surrounds a nozzle body of the valve at its downstream end.
  • the metal gas enclosing sleeve is designed so that its bottom part is formed with a passage opening obliquely to the valve end. In this way, a gas ring gap between a spray perforated disk and the bottom part of the gas enclosing sleeve is formed.
  • the gas containment sleeve is attached to the metal nozzle body either by multiple welds, by crimping, pressing, soldering or gluing.
  • An annular groove-shaped receptacle for a sealing ring for sealing against a valve seat is achieved in that an additional elaborate U-shaped retaining ring is welded to the outer circumference of the gas enclosing sleeve.
  • a fuel injection system with a plurality of fuel injection valves for fuel injection systems of internal combustion engines is already known, which are installed in an elongated gas distributor.
  • the fuel injection valves each have a valve housing, which is at least partially surrounded by a jacket body, and an axially movable valve closing body and a valve seat body having a valve seat with the cooperating valve seat surface. At least one injection orifice is provided downstream of the valve seat surface.
  • At the downstream end of each injector means are provided for producing a fuel gas mixture in the form of a metal gas containment sleeve. This gas enclosing sleeve is completely surrounded in the circumferential direction by pot-shaped valve receptacles of the gas distributor.
  • the gas distributor can be made of a plastic or metallic.
  • the fuel injection valves are e.g. secured by snap-in connections and sealed with sealing rings.
  • the fuel injection valve according to the invention with the features of the independent claim 1 has the advantage that in a simple manner, a particularly cost-effective gas enclosing body can be mounted at the discharge end of the valve.
  • the plastic injection coating customary on the known injection valves is used, which must be minimally modified compared with known injection valves only in the immediate connection region.
  • the gas-containing body is made by deep-drawing from a metal sheet, since these components can be manufactured in large numbers in a simple manner.
  • non-material-locking connection as a snap, latching or clip connection, in which lugs and tabs cooperate as corresponding connection means.
  • the thin-walled and tubular gas-containing body is very well suited for the immediate formation of annular grooves for receiving sealing rings, which serve to seal the injection valve relative to a valve seat.
  • annular grooves for receiving sealing rings, which serve to seal the injection valve relative to a valve seat.
  • outward annular beads can be generated very easily by folding.
  • additional U-shaped retaining rings can be dispensed with.
  • FIG. 1 shows the discharge-side end of a fuel injection valve as a first example of a gas enclosure
  • FIG. 2 shows the injection-side end of a fuel injection valve as a second example of a gas enclosure with an upstream injection point.
  • a valve in the form of an injection valve for fuel injection systems of mixture-compression spark-ignited internal combustion engines partially and simplified is shown in section.
  • the injection valve has an at least partially a valve housing forming, metal, substantially 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.
  • a e.g. tubular valve needle 5 arranged at its downstream end with a e.g. spherical valve closing body 7, at the periphery, for example, five flats 8 are provided, is connected.
  • the actuation of the injection valve takes place in a known manner electromagnetically.
  • an electromagnetic circuit with a solenoid 10, an armature 11 and a core 12.
  • the armature 11 is facing away from the valve closing body 7 end of the Valve needle 5 by z.
  • B. a weld by means of a laser and aligned with the core 12.
  • the magnetic coil 10 surrounds the core 12, which, for example, represents the end of an inlet nozzle enclosing the magnet coil 10, which serves to supply the medium to be metered by the valve, in this case fuel.
  • the electromagnetic circuit is closed, for example, with at least one bow-shaped guide element 14.
  • the embedded in a bobbin magnetic coil 10 and the at least one guide element 14 and wide portions of the core 12 and the valve seat carrier 1 are of a surrounded outer jacket body of the injector performing plastic extrusion 15, wherein at the same time an unillustrated electrical connector is mitangespritzt.
  • the core 12 and the valve seat carrier 1 are firmly connected to one another, for example, by means of a peripheral weld, wherein downstream of this connection point a magnetic throttle point 13 follows due to the thin-walled design of the valve seat carrier 1.
  • the plastic extrusion coating 15 it is also possible to provide another jacket body which at least partially forms the outer valve circumference and which, for example, has a metallic design as a jacket-shaped housing.
  • valve seat body 16 In the downstream, the core 12 remote from the end of the valve seat carrier 1, a cylindrical valve seat body 16 is mounted tightly in the longitudinal opening 3. At its one, the valve closing body 7 remote from the lower end face of the valve seat body 16 is concentrically and firmly connected to an example cup-shaped spray orifice plate 21.
  • the connection of valve seat body 16 and spray perforated disk 21 is effected for example by a circumferential and dense, e.g. formed by a laser weld. This type of assembly avoids the risk of undesired deformation of the spray perforated disc 21 in the region of its at least two, for example four, ejection orifices 25 formed by punching or eroding, which are located centrally in the spray perforated disc 21.
  • the spray disk 21 is also firmly connected to the valve seat carrier 1, for example, by a circumferential and tight weld.
  • the insertion depth of the valve seat member 16 consisting of valve seat body 16 and pot-shaped spray perforated disk 21 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 is fixed at non-energized magnetic coil 10 by the contact of the valve closing body 7 on a valve seat surface 29 of the valve seat body 16.
  • the spherical valve closing body 7 cooperates with the valve seat surface 29 of the valve seat body 16, which tapers in the direction of the flow in the direction of flow.
  • the other end position of the valve needle 5 is fixed in the excited magnet coil 10, for example, by the system of the armature 11 to the core 12. The path between these two end positions of the valve needle 5 thus represents the hub.
  • the injection valve and thus the valve seat carrier 1 are surrounded by a sleeve-shaped, thin-walled gas surrounding body 30 largely in the circumferential direction and at least partially axially.
  • the gas surrounding body 30 made of sheet metal by deep drawing is connected to the lower end of the plastic extrusion molding 15.
  • Upstream of the gas-surrounding body 30 is an unillustrated gas inlet channel which serves to supply the gas into the gas-surrounding body 30.
  • the gas-surrounding body 30 has an inner passage opening 32, into which not only the downstream end of the valve seat carrier 1 projects with the valve seat body 16, but are provided in the further means for gas supply and supply in the direction of the ejection openings 25.
  • the gas-surrounding body 30 surrounds, inter alia, a cup-shaped gas enclosing part 35 in a gap 36 directly formed between the gas-surrounding body 30 and the valve seat carrier 1, directly communicating with the gas inlet passage.
  • the supply of the gas is up to the fuel exiting from the ejection openings 25 of the injection port 21 guaranteed.
  • the z. B. is made of plastic, the cup-shaped gas enclosing part 35 forms as a sheet metal part through the gas enclosing body 30 in the axial direction completely enclosed treatment attachment 40.
  • the insert body 38 which is characterized by a substantially conical shape, extends completely downstream of the valve seat body 16.
  • Gasum drawnsteil 35 formed so that a bottom portion 42 is at least partially surrounded by the material of the insert body 38 and protrudes from this radially, for example, over the axial length of the insert body 38 seen centrally.
  • At the bottom portion 42 is followed by a cylindrical, axially extending skirt portion 43 which in the upstream direction of the valve seat carrier 1 z. B.
  • the jacket portion 43 of the Gasum chargedsteils 35 extends in the gap formed between the gas-surrounding body 30 and the valve seat carrier 1 36 and guaranteed by its structural design a defined gas supply.
  • the shell portion 43 is not completely cylindrical so far as he z. B. four areas 44 of larger diameter and four areas 45 of smaller diameter, which alternate in the circumferential direction of the shell portion 43 respectively.
  • the annular space 36 is used in its entire radial width, since the areas 45 of smaller diameter rest against the valve seat carrier 1 and z. B. are connected by means of welds with this firmly, while the regions 44 of larger diameter with play along the inner wall of the gas enclosing body 30 extend in the through hole 32.
  • valve seat carrier 1 and the regions 44 of larger diameter of the skirt portion 43 are equal to the number of these areas 44, ie four gas inlet channels 47 formed, for example, which are arranged at equal intervals in the circumferential direction about the valve seat carrier 1 axially.
  • the bottom portion 42 of the Gasum chargedsteils 35 extends at an axial distance to the downstream end side of the valve seat carrier 1, so that between the bottom portion 42 and this end face an annular, radially extending flow channel 48 is formed, which adjoins the gas inlet channels 47 and is flowed through radially by the gas , Thereafter, the gas flows largely axially upstream in an annular channel 49 between the one upstream of the bottom portion 42 conical, the injection port 21 toward tapered outer contour having insert body 38 and the wall of the longitudinal opening 3 in the valve seat support 1 to the deflection of the flow at the spray disk 21 in the radial Direction.
  • the metering of the gas for improved treatment of the fuel exiting from the spray openings 25 of the spray perforated disk 21 takes place via a gas ring gap 50, the axial extent of which results from the distance of the insert body 38 from the spray perforated disk 21.
  • the axial extent of the extension of the gas ring gap 50 forms the Zumeßquerrough for the gas flowing from the annular channel 49, for example, treatment air.
  • the supplied gas flows through the narrow gas ring gap 50 to a center in the insert body 38 centrally and concentrically to the valve longitudinal axis 2 and provided near the spray orifice plate 21 Gemischabspritzö réelle 51 and meets there on the output, for example, two or four spray orifices 25 fuel. Due to the small axial extent of the gas ring gap 50, the supplied gas is greatly accelerated and atomizes the fuel very fine.
  • a sealing ring 55 provides a seal between the gas-surrounding body 30 and the insert body 38 between the outer contour of the insert body 38 and the inner wall of the gas-surrounding body 30 below the bottom portion 42, the bottom portion 42 immediately defining an annular groove necessary for receiving the sealing ring 55.
  • the insert body 38 is characterized by a drip geometry at the downstream end of the treatment attachment 40.
  • a dripping crown 56 with a multitude of tines, which adjoins the bottom end downstream, provides for an improved dripping behavior (especially when operating without gas) of the fuel, since the fuel can not run into large drops.
  • the tines of the dropping crown 56 are formed, for example, in the shape of triangular teeth tapering in the downstream direction, whereas the free areas formed between the tines are inversely triangular in shape, ie wider in the downstream direction.
  • gas supply means which is designed for example in the form of a gas inlet channel, the gas enters via several, the wall of the gas enclosing body 30 completely penetrating inlet openings 58 in between the valve seat carrier 1 and gas enclosure body 30 formed in the passage opening 32 gap 36 a.
  • a suction pipe of the internal combustion engine for example, two sealing rings 60 are provided on the outer circumference of the discharge end.
  • the upper, the magnetic coil 10 facing sealing ring 60 is arranged in an introduced in the plastic extrusion 15 annular groove 61.
  • the deep-drawn gas-enclosing body 30 made of sheet metal has in its central axial extension region two circumferential annular beads 62 formed by folding and projecting outwards perpendicular to the axial tubular extension.
  • the two annular beads 62 together with the outer wall of the gas surrounding body 30 in this area a further annular groove 63rd
  • the gas enclosing body 30 is attached to the lower downstream end of the plastic extrusion 15 by means of a snap, snap or clip connection.
  • the plastic extrusion coating 15 is designed, for example, at its lower end facing the gas-enclosing body 30 such that a circumferential or a plurality of circumferentially distributed, outwardly sawtooth-like projections 65 are provided.
  • the gas-surrounding body 30 above the inlet openings 58 a plurality of circumferentially distributed, inwardly towards the valve seat support 1 standing elastic tabs 66 which engage behind the lugs 65. At this junction no tightness must be achieved, so that the specified connection options can be used very well because of their simplicity.
  • connection region can also be made modified, but the metal gas-enclosing body 30 is always fastened to the plastic extrusion coating 15 by means of a non-material-joining method with corresponding connection means.
  • the tabs 65 may engage, for example, in openings or windows of the gas enclosing body 30. Special, not shown securing hooks may also be formed on the gas enclosure body 30.
  • the length of the gas enclosing body 30 can be varied very easily. Accordingly, the two folded annular beads 62 can be formed at a different location of the gas enclosing body 30.
  • a very elongated gas enclosure body 30 is advantageous if a far superior Abspritzddling should be provided. According to the length of the gas enclosing body 30, only the valve seat carrier 1 and the valve needle 5 need to be extended; all other components of the Brennstöffeinspritzventils can be used in an identical manner.
  • the ejection area (conditioning attachment 40) extends e.g. in the valve according to Figure 2 in the intake passage of the internal combustion engine clearly. Wall wetting of the intake duct can be avoided in a simple manner by permitting targeted spraying onto one or more intake valves, thereby reducing the exhaust emission of the internal combustion engine and the fuel consumption.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP98936192A 1997-08-22 1998-06-17 Brennstoffeinspritzventil Expired - Lifetime EP0934461B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19736548A DE19736548A1 (de) 1997-08-22 1997-08-22 Brennstoffeinspritzventil
DE19736548 1997-08-22
PCT/DE1998/001648 WO1999010650A1 (de) 1997-08-22 1998-06-17 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP0934461A1 EP0934461A1 (de) 1999-08-11
EP0934461B1 true EP0934461B1 (de) 2006-10-18

Family

ID=7839828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98936192A Expired - Lifetime EP0934461B1 (de) 1997-08-22 1998-06-17 Brennstoffeinspritzventil

Country Status (9)

Country Link
US (1) US6598809B1 (pt)
EP (1) EP0934461B1 (pt)
JP (1) JP2001504912A (pt)
KR (1) KR20000068809A (pt)
CN (1) CN1104557C (pt)
BR (1) BR9806192A (pt)
DE (2) DE19736548A1 (pt)
TW (1) TW358857B (pt)
WO (1) WO1999010650A1 (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946602A1 (de) 1999-09-29 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102005019837A1 (de) * 2005-04-28 2006-11-02 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zu dessen Montage
EP2354530B1 (en) * 2010-02-04 2013-04-10 Delphi Technologies Holding S.à.r.l. Needle for needle valve
KR101160043B1 (ko) * 2010-06-23 2012-06-25 주식회사 케피코 연료 분사 밸브
DE102012204305A1 (de) * 2012-03-19 2013-09-19 Robert Bosch Gmbh Dicht umspritztes Bauelement und Verfahren zum Erstellen eines solchen Bauelements
CN104350274B (zh) * 2012-06-08 2017-05-31 日立汽车系统株式会社 燃料喷射阀

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587888A (en) * 1950-04-03 1952-03-04 Hastings Mfg Co Composite piston ring assembly
DE3300511A1 (de) * 1983-01-08 1984-07-12 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
DE3411337A1 (de) * 1984-03-28 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
DE3427526A1 (de) * 1984-07-26 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
US4951878A (en) * 1987-11-16 1990-08-28 Casey Gary L Pico fuel injector valve
DE3925212C2 (de) * 1989-07-29 1997-03-27 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE4019752A1 (de) * 1990-06-21 1992-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil
DE4121372A1 (de) 1991-05-31 1992-12-03 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
DE4129834A1 (de) * 1991-09-07 1993-03-11 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
DE4205709A1 (de) * 1992-02-25 1993-08-26 Bosch Gmbh Robert Gasverteiler fuer brennstoffeinspritzanlagen
DE4304804A1 (de) * 1993-02-17 1994-08-18 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
DE4435270A1 (de) * 1994-10-01 1996-04-04 Bosch Gmbh Robert Brennstoffeinspritzvorrichtung
DE19505886A1 (de) * 1995-02-21 1996-08-22 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
DE19632196B4 (de) * 1996-08-09 2004-11-04 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
DE19712922B4 (de) * 1997-03-27 2005-08-11 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
US6598809B1 (en) 2003-07-29
BR9806192A (pt) 1999-11-16
JP2001504912A (ja) 2001-04-10
KR20000068809A (ko) 2000-11-25
DE59813774D1 (de) 2006-11-30
WO1999010650A1 (de) 1999-03-04
DE19736548A1 (de) 1999-02-25
CN1104557C (zh) 2003-04-02
TW358857B (en) 1999-05-21
EP0934461A1 (de) 1999-08-11
CN1237226A (zh) 1999-12-01

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