EP0730091B1 - Soupape d'injection de combustible pour un moteur à combustion interne - Google Patents

Soupape d'injection de combustible pour un moteur à combustion interne Download PDF

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Publication number
EP0730091B1
EP0730091B1 EP95117473A EP95117473A EP0730091B1 EP 0730091 B1 EP0730091 B1 EP 0730091B1 EP 95117473 A EP95117473 A EP 95117473A EP 95117473 A EP95117473 A EP 95117473A EP 0730091 B1 EP0730091 B1 EP 0730091B1
Authority
EP
European Patent Office
Prior art keywords
fuel
jet
fuel injection
plate
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
EP95117473A
Other languages
German (de)
English (en)
Other versions
EP0730091A2 (fr
EP0730091A3 (fr
Inventor
Michael Klaski
Georg Harter
Harald Walter
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 EP0730091A2 publication Critical patent/EP0730091A2/fr
Publication of EP0730091A3 publication Critical patent/EP0730091A3/xx
Application granted granted Critical
Publication of EP0730091B1 publication Critical patent/EP0730091B1/fr
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
    • 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
    • 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
    • F02M61/1853—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
    • 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

Definitions

  • the invention is based on a fuel injector for an internal combustion engine according to the preamble of the claim 1.
  • a fuel injector is already known (DE-OS 37 16 402), the downstream of a metering point for the Fuel has a perforated plate to by means of Perforated plate to a line beam or several line beams generate the inside of a deflection sleeve of the Fuel injector approximately parallel to one Longitudinal valve axis of the fuel injector run and approximately in the end region of the deflection sleeve on an inner ring hit.
  • the inner ring is made up of individual inner surfaces inclined with respect to the longitudinal axis of the valve together, at which those striking the inner surface Cord rays are reflected, after which this from a Spray opening of the deflection sleeve inclined to the longitudinal axis of the valve emerge.
  • the fuel injector according to the invention with the characteristic features of claim 1 has in contrast the advantage of being inexpensive Fuel injectors for generating a Fuel jet or multiple fuel jets can be produced with a precise alignment, with the most varied in a simple manner Have fuel jet shapes implemented. In particular it is in a mass production of Fuel injectors possible without much effort, one consistently precise orientation and shape of the Fuel jet, for example with a narrow, wide fanning out or conical fuel jet, too guarantee.
  • FIG. 1 shows a Section through a partially shown, according to the invention trained fuel injector
  • Figure 2 a Top view of a baffle plate after a first one embodiment according to the invention
  • Figure 3 a Side view of a section along a line III-III in Figure 2
  • Figure 4 shows a section along a line IV-IV in Figure 3
  • Figure 5 is a plan view of the baffle plate after a second embodiment of the invention
  • Figure 6 a Side view of a section along the line VI-VI in Figure 5
  • Figure 7 is a plan view of the baffle plate after a third embodiment of the invention
  • Figure 8 a Top view of the baffle plate after a fourth Embodiment according to the invention
  • Figure 9 a Side view of a section along a line IX-IX in Figure 8
  • Figure 10 is a plan view of the baffle a fifth embodiment of the invention
  • figure 11 is a plan view of the baffle plate after a sixth embodiment according to the invention
  • Figure 12 shows a Section through a partially
  • FIG. 1 shows a section through an only partially illustrated fuel injector 3, in particular for mixture-compressing, spark-ignition internal combustion engines is provided.
  • the fuel injector 3 is for example, plugged into an intake pipe 5 Internal combustion engine attached.
  • the intake pipe 5 limits a flow cross section 6, in which of the Air sucked into the internal combustion engine for combustion flows.
  • the direction of flow of the intake air is through corresponding arrows 17 marked in FIG. 1.
  • the Fuel injector 3 has a valve housing 7 for example, electromagnetically actuated and gives the fuel from a at its spray end 4 Spray opening 19 of a deflection sleeve 18 in the Flow cross section 6 from.
  • the deflection sleeve 18 has one elongated shape and is on the valve housing 7 of the Fuel injector 3, for example, pluggable attached and made of plastic, for example.
  • the Fuel leaves the fuel injector 3 in shape a single or double or multi-jet fuel jet 14.
  • the fuel jet 14 decays after, for example short spray distance in the finest fuel droplets and mixes with the air flowing in the intake pipe 5, so that there is as homogeneous a fuel-air mixture as possible forms, which is then not closer downstream one shown intake valve in the combustion chambers Internal combustion engine burns.
  • the fuel jet 14 can different fuel jet images according to the invention assume, for example, a narrow, wide fanning out or conical fuel jet image.
  • the Fuel jet 14 is usually not on that shown intake valve of the internal combustion engine directed.
  • the fuel is approximately in the middle of the Suction pipe 5 limited flow cross-section 6 delivered. The delivery of fuel in the middle of the Flow cross section 6 prevents the formation of a Burning disruptive wall film made of fuel, which is otherwise in particular on the walls of the intake pipe 5 and Inlet valve precipitates.
  • the fuel is inside the fuel injector 3 in a known manner from a valve closing body or a valve closing needle and a valve seat.
  • a valve closing body or a valve closing needle and a valve seat in the Embodiment is the valve closing body of a Valve closing ball 8 formed in the closed position for example a conical valve seat 9 is applied to the fuel flow to a downstream of the Shut off valve seat 9 located metering opening 12.
  • the valve closing ball 8 from the valve seat 9 is in the open position lifted off so that fuel from the metering opening 12 flows out.
  • the metering opening 12 is, for example, in a so-called spray plate 13 is formed.
  • the Fuel leaves the metering opening 12 in a bundled manner Shape in the form of a cord beam 15, which is located inside the deflection sleeve 18, for example in the direction of a Longitudinal valve axis 16 of fuel injector 3, extends.
  • the metering opening 12 is coaxial with Longitudinal valve axis 16.
  • Dosing openings 12 are provided in the spray plate 13 his.
  • a deflection surface 21 which of a surface of a thin, for example rectangular baffle 22 is formed.
  • the Baffle 22 is, for example, as an embossed part made of metal manufactured and one-sided on a short side surface a fastening end 31, for example in a groove 23 introduced and held in an inner wall 24 of the Deflection sleeve 18 for example in the end region of the Spray opening 19 is provided.
  • the deflection surface 21 is the valve seat 9 facing and closes with its facing the groove 23
  • an angle of attack ⁇ which is greater than zero and less than 90 degrees.
  • ⁇ of the baffle 22 in a range of about 30 degrees to 60 degrees.
  • the angle of attack ⁇ and the Distance from the metering opening 12 to the baffle 22 is chosen such that a fuel jet 14 or more Fuel jets 14 are generated, for example in the center of the flow cross section 6 from the deflection sleeve 18 emerge and onto an intake valve or more Intake valves of the internal combustion engine are directed.
  • the cord beam 15 strikes in the area of one in FIG a line II shown in broken lines, free plate end 32 on the baffle 22 and leaves it essentially parallel to the deflection surface 21 the baffle 22, with a reflection of the cord beam 15 on the baffle 22 is largely avoided.
  • the Direction of the baffle 22 leaving Fuel jet 14 is by the employment of the Baffle 22, or by changing the Angle of attack ⁇ extremely variable, so that for the fuel injector 3 different Installation positions and locations on the intake pipe 5 can result. As shown in Figure 1, this can Fuel injector 3 also perpendicular to Flow direction 17 are installed in the intake pipe 5.
  • the fuel jet 14 leaves it Fuel injection valve 3 from the spray opening 19 in essentially with the angle of attack ⁇ of the baffle 22 and is thus opposite to the longitudinal valve axis 16 and opposite Flow direction 17 in the intake pipe 5 inclined to for example on an intake valve of the internal combustion engine to aim. But it is also possible that Fuel injection valve 3 inclined to flow direction 17 To be installed in the intake pipe 5, so that a smaller Angle of attack ⁇ of the baffle 22 is required to Dispense fuel jet 14 toward the inlet valve. Due to the inclined position of the fuel injector 3 results there is also a shorter distance of the fuel jet 14 to the inlet valve, causing condensation of Fuel on cold walls, especially on walls of the Intake pipe 5 and the inlet valve is avoided.
  • the cord beam 15 striking the deflection surface 21 leaves it essentially parallel to the deflection surface 21 the deflection plate 22 in the direction of the deflection surface 21 symmetrically dividing plate longitudinal axis 25.
  • recesses 26, 27 designed according to the invention are provided, which, as shown in Figures 2 to 4, from the Deflection surface 21 of the baffle 22 are excluded.
  • the shape of the recesses 26, 27 may be the shape of the Deflection plate 22 leaving fuel jet 14 such be influenced, for example, one or two Multi-jet fuel jets 14 arise which the Deflection plate 22 with predetermined from the recesses 26, 27 Leave fuel jet forms.
  • FIG 1 shows a first invention Embodiment of the in Figure 2 only partially shown baffle plate 22.
  • the depressions 26, 27th serve on the one hand to redirect the single jet striking line 15 substantially in the direction the plate longitudinal axis 25 and on the other hand for dividing the Cord beam 15 in, for example, two individual ones Fuel jets 14.
  • the following as Collection well 26 designated well 26 is in shape excluding a trough from the deflection surface 21.
  • the hollow for example, has an approximately semicircular one Impact cross section 41 of the longitudinal axis 25 of the plate is divided symmetrically.
  • the longitudinal axis 25 of the plate closes with the longitudinal valve axis 16 of the Fuel injection valve 3 also the angle of attack ⁇ on.
  • the catch recess 26 is in communication with two further recesses 27, which are referred to below as Drain wells 27 are referred to.
  • the Drainage wells 27 are in the form of channels from the Deflection surface 21, which is different from the Collection recess 26 spreading apart for free Extend plate end 32 out.
  • the free plate end 32 has one of two tapering plate side surfaces, for example 34 formed, pointed end 40, for example on the Longitudinal plate axis 25. It should be noted that the invention does not apply to a pointed plate end 32 is limited. Rather, this can be very different Take shape, whereby the design of the 32 different types of fuel jet let it be realized.
  • a pointed plate end 32 is suitable especially for two-jet fuel jets. It is but it is also possible to make the free plate end 32 blunt, for example with a perpendicular to the valve longitudinal axis 16 rectangular plate end 32, for example to generate a single jet fuel jet.
  • FIG 3 a sectional view along a Line III-III in Figure 2, shown, meets the in Fuel injection valve 3 from the metering opening 12 emitted cord beam 15 in the deflection sleeve 18 initially on the catch recess 26 to in this collect and then in the drain wells 27 in To continue flowing towards the free plate end 32 finally at the plate end 32 over the plate side surfaces 34 stream.
  • the catch recess 26 To when the line beam 15 strikes the catch recess 26 is a reflection of the cord beam 15 to avoid as far as possible, this has a beveled Bottom 36, which is approximately in the direction of the Collection recess 26 striking line beam 15 inclined is.
  • the bottom 36 of the collecting recess 26 goes downstream towards the free plate end 32 in floors 29 of the drain wells 27 over that with constant Lead depth to the plate end 32 to the in the Collection well 26 collected fuel without if possible Flow obstruction via the drain depressions 27 to derive.
  • the fuel flows from the drain wells 27 over the free plate end 32, the direction of emerging fuel jet 14 through the directions of Drainage wells 27 is predetermined so that by means of two drainage wells 27 a double jet Fuel jet 14 is generated.
  • the catch recess 26 can impingement differences of the Cord beam 15, for example due to Manufacturing tolerances of the metering opening 12 resulting Eccentricity between the metering opening 12 and the Collection recess 26, advantageously balanced be, so that always a consistently precise alignment and shape of the fuel jet 14 is present.
  • the drain wells have 27 floors 29 with for example triangular cross section. It is also possible the floors 29 with a semi-circular or U-shaped Form cross-section.
  • fuel jets 14 with different To generate fuel jet images, for example with a narrow, broad or one cone-shaped fuel spray pattern.
  • FIG. 5 shows a top view of the baffle plate 22 corresponding to a second invention Embodiment in which all the same or equivalent parts with the same reference numerals of first exemplary embodiment according to FIGS. 1 to 4 Marked are.
  • the baffle 22 no catch recess 26, but only two Drainage wells 27, which are in the area of impact of the Fuel jet 14 open into each other and in the direction of free plate end 32 diverge, in the form of Thighs of a triangle.
  • FIG. 7 shows a third in a top view embodiment of the baffle 22 according to the invention, where all the same or equivalent parts with the same reference numerals from the previous Exemplary embodiments according to FIGS. 1 to 6 Marked are.
  • the collecting recess 26 can also have a circular shape Have impact cross-section 41, in which in turn two Drain wells 27 open towards the free Plate end 32 diverge.
  • FIG. 8 shows a fourth in a top view embodiment of the baffle 22 according to the invention, where all the same or equivalent parts with the same reference numerals from the previous Exemplary embodiments according to FIGS. 1 to 7 Marked are.
  • the collecting recess 26 can also have a triangular shape Have impact cross-section 41, in which in turn two Drain recesses 27 open out, as in FIG. 8 is shown in dashed lines, in the direction of the free Plate end 32 also diverge to one to generate two-jet fuel jet 14.
  • the triangular impact cross section 41 tapers in Direction of the free plate end 32.
  • FIG. 10 shows a fifth in a top view embodiment of the baffle 22 according to the invention, where all the same or equivalent parts with the same reference numerals from the previous Exemplary embodiments according to FIGS. 1 to 9 Marked are.
  • can the collecting recess 26 with the step 38 according to FIG 8 also have the outer shape of a pen to to generate a single jet fuel jet 14.
  • the Fuel flows over the tip end 40 of stage 38 from.
  • it is also possible to blunt the end 40 train for example with a right angle to Plate longitudinal axis 25 extending plate side surface 34.
  • FIG. 11 shows a sixth in a top view embodiment of the baffle 22 according to the invention, where all the same or equivalent parts with the same reference numerals from the previous Exemplary embodiments according to FIGS. 1 to 10 Marked are.
  • the free plate end 32 with the plate side surfaces 34 also have a serrated shape, for example symmetrical to the plate longitudinal axis 25 left and right a pointed end 40 is provided so that the free Plate end 32 assumes a W shape.
  • the catchment well 26 has a circular impact cross section 41 and goes from this to level 38 to the fourth Embodiment a single-jet fuel jet 14th to create.
  • FIG. 12 shows a seventh in a top view embodiment of the baffle 22 according to the invention, where all the same or equivalent parts with the same reference numerals from the previous Exemplary embodiments according to FIGS. 1 to 11 Marked are.
  • FIG. 12 can completely dispense with the drain wells 27 and only one catch recess 26 can be used.
  • the Collection recess 26, for example, an inner surface have that of the outer surface of a hemispherical shell corresponds to after the impact of the cord beam 15 the catch recess 26 a single-beam To generate fuel jet 14.
  • FIG. 14 shows an eighth in a top view embodiment of the baffle 22 according to the invention, where all the same or equivalent parts with the same reference numerals from the previous Exemplary embodiments according to FIGS. 1 to 13 Marked are.
  • the catch recess 26 may correspond to the third Embodiment according to Figure 7, for example have circular impact cross section 41.
  • trough-shaped drainage depressions 27 can be diamond-shaped Level 38 should be provided, which is different from the Collection recess 26 to the plate end 32, for example with constant depth.
  • step 38 can also be a curved one Have floor 50 that faces plate side surfaces 34 deepened to by means of the catch recess 26 and the Step 38 to a two-jet fuel jet 14 produce.

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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)

Claims (7)

  1. Injecteur de carburant pour un moteur à combustion interne comportant au moins un orifice de dosage (12) pour la sortie du carburant comme un jet filiforme et rencontrant, à l'intérieur de l'injecteur, une surface déflectrice (21) qui fait sortir le carburant dans une direction inclinée par rapport à l'axe longitudinal (16) de l'injecteur, en sortie de l'injecteur,
    caractérisé en ce qu'
    au moins une cavité (26, 27), pour dévier et mettre en forme le jet de carburant (15), est réalisée dans la surface déflectrice (21), dans la zone d'impact du jet de carburant (15).
  2. Injecteur selon la revendication 1,
    caractérisé en ce que
    la surface déflectrice (21) est formée par la face supérieure d'une plaque déflectrice (22).
  3. Injecteur selon la revendication 2,
    caractérisé en ce que
    la plaque déflectrice (22) comporte une extrémité pointue (40) par laquelle le carburant quitte cette plaque déflectrice (22).
  4. Injecteur selon l'une des revendications 2 ou 3,
    caractérisé en ce qu'
    au moins une cavité (26), que rencontre le jet filiforme de carburant (15), est réalisée sous la forme d'une gorge dans la surface déflectrice (21) de la plaque déflectrice (22).
  5. Injecteur selon la revendication 2 ou 3,
    caractérisé en ce qu'
    au moins une cavité (27) en forme de goulotte (27) est réalisée dans la surface déflectrice (21) de la plaque déflectrice (22), cette gorge allant jusqu'à l'extrémité libre (32) de la plaque.
  6. Injecteur selon la revendication 4,
    caractérisé en ce que
    la cavité (26) en forme de gorge communique avec deux cavités (27) en forme de goulottes.
  7. Injecteur selon la revendication 4,
    caractérisé en ce que
    la cavité (26) en forme de gorge présente un fond (36) incliné.
EP95117473A 1995-01-31 1995-11-07 Soupape d'injection de combustible pour un moteur à combustion interne Expired - Lifetime EP0730091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19502915 1995-01-31
DE19502915A DE19502915A1 (de) 1995-01-31 1995-01-31 Brennstoffeinspritzventil für eine Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0730091A2 EP0730091A2 (fr) 1996-09-04
EP0730091A3 EP0730091A3 (fr) 1996-10-02
EP0730091B1 true EP0730091B1 (fr) 2000-02-09

Family

ID=7752690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117473A Expired - Lifetime EP0730091B1 (fr) 1995-01-31 1995-11-07 Soupape d'injection de combustible pour un moteur à combustion interne

Country Status (5)

Country Link
US (1) US5725158A (fr)
EP (1) EP0730091B1 (fr)
JP (1) JPH08232815A (fr)
CN (1) CN1066803C (fr)
DE (2) DE19502915A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4081245B2 (ja) * 2001-04-13 2008-04-23 株式会社共立 燃料噴射装置及びそれを備えた混合気生成装置
JP5174644B2 (ja) * 2008-12-08 2013-04-03 三菱電機株式会社 燃料噴射弁
US8622046B2 (en) 2010-06-25 2014-01-07 Caterpillar Inc. Fuel system having accumulators and flow limiters
DE102012208087B4 (de) * 2012-05-15 2024-03-14 Man Energy Solutions Se Kraftstoffeinspritzdüse
US10920726B2 (en) * 2015-07-13 2021-02-16 Xcentrick Innovations, Ltd. Multi-function fuel injector for internal combustion engines and method
US11073071B2 (en) * 2019-07-23 2021-07-27 Ford Global Technologies, Llc Fuel injector with divided flowpath nozzle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR608840A (fr) * 1925-12-31 1926-08-03 Gicleur à aiguille pour moteurs à combustion interne
US4657189A (en) * 1985-03-13 1987-04-14 Aisan Kogyo Kabushiki Kaisha Electromagnetic fuel injection valve for an internal combustion engine having a plurality of intake valves
GB8611950D0 (en) * 1986-05-16 1986-06-25 Lucas Ind Plc Gasoline injector
JPH025753A (ja) * 1988-06-23 1990-01-10 Aisan Ind Co Ltd 燃料噴射弁とそのノズル

Also Published As

Publication number Publication date
DE19502915A1 (de) 1996-08-01
CN1066803C (zh) 2001-06-06
US5725158A (en) 1998-03-10
CN1136134A (zh) 1996-11-20
JPH08232815A (ja) 1996-09-10
EP0730091A2 (fr) 1996-09-04
DE59507788D1 (de) 2000-03-16
EP0730091A3 (fr) 1996-10-02

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