EP2596230A1 - Dispositif d'injection à vaporisation améliorée - Google Patents

Dispositif d'injection à vaporisation améliorée

Info

Publication number
EP2596230A1
EP2596230A1 EP11724597.7A EP11724597A EP2596230A1 EP 2596230 A1 EP2596230 A1 EP 2596230A1 EP 11724597 A EP11724597 A EP 11724597A EP 2596230 A1 EP2596230 A1 EP 2596230A1
Authority
EP
European Patent Office
Prior art keywords
injection
hole
spray
holes
injection hole
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.)
Granted
Application number
EP11724597.7A
Other languages
German (de)
English (en)
Other versions
EP2596230B1 (fr
Inventor
Guenter Dantes
Bernd Krauss
Andreas Krause
Anja Melsheimer
Harald Lang
Martin Stahl
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 EP2596230A1 publication Critical patent/EP2596230A1/fr
Application granted granted Critical
Publication of EP2596230B1 publication Critical patent/EP2596230B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
    • 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
    • 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
    • F02M61/1846—Dimensional characteristics of 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
    • 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

Definitions

  • the present invention relates to an injection device for injecting fluid, in particular fuel, with an improved spray treatment.
  • Fuel injection devices are known in the prior art in various configurations. Frequently be here
  • Spray hole disc is arranged.
  • the injection holes provided in the spray perforated disk define u.a. the spray treatment during the injection of fuel.
  • Such spray perforated disks have basically proven, but there is a continuing desire to further reduce fuel consumption through an improved spray conditioning and the
  • an injection is carried out in such a way that the injected fluid is torn open at the outlet from the spray holes as wide as possible and in particular forms a partial hollow blade in order to achieve a very good spray distribution.
  • This is inventively achieved in that at least a first and a second injection hole in a
  • the opening edge distance is the distance which, when a straight line is formed at the inflow opening, has the maximum distance between two edge points of the inflow opening.
  • Further spray hole axes of the injection holes according to the invention are arranged in mutually different directions. As a result, a spray treatment in different directions is achieved at the outlet from the first and second spray hole, so that a relatively wide space area is covered with injected fluid.
  • the inflow at the two injection holes is positively influenced by the main inflows influencing each other in the two injection holes and causing a strong deflection on the inflow side of the injection holes.
  • the injection holes are thus intentionally not arranged at equal intervals along the circumference, but preferably in pairs with a small distance, so that a positive mutual
  • the first and second spray holes of different sizes must be satisfied, that is, the distance is defined by the largest opening edge distance of one of the injection holes.
  • the distance between the first and second injection hole is 0.5 times to 1.5 times the maximum opening edge distance of
  • Spray holes and particularly preferably the distance between the two spray holes corresponds approximately to the maximum opening edge distance of the spray holes.
  • the spray hole axes of the first and second spray hole in
  • Spray hole axis extends through a plane comprising the inlet opening.
  • the inclination angle of the injection hole axes are preferably in a range from 5 ° to 85 °, preferably 20 ° to 60 °, and the angles of inclination are more preferably approximately up to 40 °, and preferably approximately 40 °.
  • the spray holes of a spray hole pair each have one
  • Spray hole axis which have the same angle of inclination, but are directed in different directions. As a result, essentially the same shape spray cone per injection hole can be achieved.
  • an even number of spray holes is provided, wherein in each case two of the spray holes are arranged in pairs, corresponding to the arrangement of the first and second spray holes. This allows a particularly good spray treatment, in particular a spray pattern with two
  • Spray jets can be generated in each case in the form of cones, wherein each spray jet is generated by a plurality of spray holes. Alternatively, an odd number of spray holes are provided, which preferably produce a spray pattern with only a single jet of spray in cone shape.
  • At least one of the injection holes has a widening shape, in particular a conically widening shape.
  • the spray-hole shape expands particularly preferably in the direction of flow.
  • Injection holes have an expanding shape, wherein the expanding shapes may be the same or different.
  • an inflow opening of a spray hole is circular or oval.
  • the maximum corresponds
  • the maximum opening edge distance of a largest axis corresponds to one of the oval-shaped openings, in particular a main axis of an ellipse.
  • the first and second spray holes are arranged on a circumference and the injection hole axes are arranged at a hole pitch angle of 20 ° to 60 °, preferably 20 ° to 30 °, and preferably about 25 °.
  • the injection device further comprises a funnel-shaped inflow space, which is arranged on the inflow side of the injection holes. Through this funnel-shaped inflow a relatively sharp deflection of the
  • Inflow fluid reaches the injection holes, which entails an increased turbulence of the fluid and contributes to improved spray conditioning.
  • a main flow of the fluid is supplied to each spray hole in an inflow angle, so that a sum of the inflow angle and an angle of the spray hole axis is less than or equal to 90 °.
  • the inflow angle is between 40 ° and 60 °.
  • the injection device further comprises a third and a fourth injection hole, which are arranged at a distance which is less than or equal to a double maximum opening edge distance at the
  • Inflow side of the injection holes is and whose injection hole axes are arranged in mutually different directions. Furthermore, the third and fourth injection hole are arranged opposite the first and second injection hole.
  • the injection device comprises a fifth and a sixth injection hole, which are arranged opposite to each other and whose spray hole axes are arranged in different directions.
  • the fifth and sixth spray holes are at a greater distance from
  • the injection holes are preferably arranged in a spray perforated disk.
  • Spray hole disc can then be easily attached to the injector.
  • Figure 1 is a plan view of a spray hole geometry of a
  • FIG. 2 shows a sectional view along the line II-II of FIG. 1,
  • Figure 3 is a schematic sectional view taken along the line III-III.
  • Figures 4 to 10 are plan views of injection hole geometries according to further
  • Fuel injection valve with a spray perforated disk 2 according to a first embodiment of the invention described in detail.
  • the injection valve 1 comprises a spray perforated disk 2, which is arranged on a valve seat 4. Fuel is supplied for injection through an opening 4a in the valve seat 4 in a funnel-shaped, expanding inflow space 5 and guided there to the spray holes.
  • the flow of the fuel to the spray holes indicated by the arrows A, B, C.
  • the spray perforated disk 2 comprises a total of six injection holes, namely a first injection hole 1 1, a second injection hole 12, a third injection hole 13, a fourth injection hole 14, a fifth injection hole 15 and a sixth injection hole 16. It is first and the second injection hole 1 1, 12 and the third and the fourth injection hole 13, 14 arranged as a spray hole pair each relatively close to each other.
  • the injection holes 1 1, 12, 13, 14, 15, 16 are cylindrical and all each have the same diameter. In FIG. 1, for reasons of clarity, only the first diameter D1 of the first is shown Plotted injection hole and the diameter D2 of the second injection hole, the cylindrical injection holes of each plan view of Figure 1 appear oval-shaped.
  • a distance 3 between the first injection hole 1 1 and the second injection hole 12 corresponds to the diameter D1 or D2 of the two
  • the first injection hole 1 1 and the second injection hole 12 are arranged relatively close to each other, whereby the flow on one inflow side 2 a of the spray orifice plate 2 mutually influenced.
  • the spray holes can conically widen or taper or also have different diameters in the flow direction, wherein any combinations are possible.
  • Figure 3 shows a sectional view through the first and second injection hole 1 1 and 12.
  • the reference numeral 1 1 a designates a spray hole axis of the first injection hole 1 1 and the reference numeral 12a denotes a second
  • the first injection hole 1 1 and the second injection hole 12 are arranged in different directions and also have different angles of inclination.
  • the angle of inclination of the injection holes is in each case the one angle which forms the smallest angle on the inflow side 2a with a plane comprising the injection hole opening.
  • the inclination angle of the first injection hole is denoted by and
  • Inclination angle of the second injection hole 12 with ß which is about 45 ° and ß about 70 °.
  • a sum of the inclination angle and the inflow angle ⁇ at the first injection hole 1 1 is about 85 ° and thus smaller than 90 °.
  • Spray hole 12 is about 85 °. Because the sum of the angle of inclination and the inflow angle at each injection hole is less than 90 °, a relatively flat flow of the injection holes can be achieved. Further, as is apparent from Figure 1, is achieved by the close arrangement of the first and second spray hole 1 1, 12 a reinforced one-sided Lochanstromung for each injection hole.
  • the flow of the individual injection holes are indicated by the arrows, wherein the length of the arrows corresponds to the magnitude of the flow.
  • the main flow to the spray holes is marked with the letter C.
  • Lower inflowing fuel quantities are indicated by the arrows D and E.
  • a hole spacing angle ⁇ between the first injection hole 11 and the second injection hole 12 is approximately 25 °.
  • Hole distance angle ⁇ is defined by a center M of the spray hole 2 from. All spray holes 1 1, 12, 13, 14, 15 and 16 lie on a common circumference K. Alternatively, the injection holes can not lie on a common circumference.
  • the paired arrangement of spray holes with a relatively small distance thus allows an increased one-sided spray hole flow.
  • this flow is contrary to a direction of inclination of the
  • injection hole axes of the injection holes are arranged such that the spray jets generated do not meet in the injection space. This ensures the widest possible spread of the fuel droplets in the injection space without overlaps.
  • a thickness of the spray perforated disk 2 corresponds approximately to a diameter of the injection holes.
  • the main flow of the fifth and sixth spray holes 15, 16 is mainly due to the inclination of the injection hole axes 15a and 16a inwardly and the shape of the inflow space 5 mainly from the outside.
  • the main flow is in the paired spray holes 1 1, 12 and 13, 14 substantially in a central region from the outside of the injection hole pair.
  • a relatively small flow is present at the inner areas of the injection holes a relatively small flow is present.
  • the angle of the injection hole axis is different to Hauptanströmwinkel, resulting in an additional impact in the spray hole. As a result, the jet generated by the injection hole is deformed more to a hollow cone, which the
  • the Spray hole angle at the first injection hole about 45 ° and the main flow angle ⁇ is about 35 °.
  • the difference between the main flow angle ⁇ and the tilt angle is preferably equal to or greater than 10 °.
  • FIGS. 4 to 10 further exemplary embodiments are described in detail with reference to FIGS. 4 to 10, wherein identical or functionally identical parts are designated by the same reference numerals as in the first exemplary embodiment.
  • the arrows on the spray holes shown in FIGS. 4 to 10 indicate the directions of inclination of the spray holes, wherein FIGS. 4 to 10 each show a plan view of the inflow sides 2 a of the spray perforated disks 2.
  • a total of eight spray holes 1 1 to 18 are provided, wherein two pairs of spray holes 1 1, 12 and 13, 14 are arranged at a distance 3, which corresponds to a maximum opening edge distance of the injection holes on the inflow side.
  • the injection holes in this exemplary embodiment are cylindrical, and because of the inclination, the cylindrical injection holes on the surface of the spray perforated disc form ovals, so that the distance 3 corresponds to a longitudinal axis of the oval.
  • the centers of the injection holes 1 1 to 18 are all on a common circumference K. Further, the injection directions of the injection holes are chosen such that only two directions are present. Here, in the paired spray holes 1 1 and 12 and 13 and 14, the injection directions are chosen such that they are opposite to each other (see Figure 4).
  • a total of six injection holes 1 1 to 16 are provided, wherein the injection holes are also formed cylindrically.
  • the centers of the injection holes lie on a common
  • Circumference K The injection holes are inclined in mutually different directions, so that at the downstream side, as indicated by the arrows, fuel exits in various directions.
  • injection holes 1 1 to 14 are arranged.
  • the injection holes are again on a circumference K and the opening directions of the injection holes are selected so that the
  • Spray hole axes of the pairwise injection holes are directed by an angle ⁇ by about 140 ° opposite to each other.
  • Embodiment all existing spray holes arranged in pairs, resulting in a particularly good fuel processing.
  • the fifth embodiment shown in Figure 7 substantially corresponds to the third embodiment of Figure 5, in contrast to the injection directions of the injection holes are directed in each case only in two directions. These directions are opposite to each other by 180 °, of the six arranged spray holes four are arranged in two spray-hole pairs and the spray holes 1 1, 12 and 13, 14 are directed in opposite directions.
  • the sixth embodiment shown in Figure 8 also has a total of six injection holes 1 1 to 16, wherein the injection holes 1 1 and 12 and 13 and 14 are each arranged at a distance 3 to each other. In this
  • the distance 3 is equal to twice the maximum opening edge distance of the injection holes 1 1, 12, 13, 14. Since the cylindrical injection holes are inclined in this embodiment again to the axial direction, the maximum opening edge distance is the major axis of the ovals of the injection holes.
  • the injection direction of all injection holes 1 1 to 16 is directed inwards, so that a high fuel concentration is obtained in a central region of an injection space.
  • the seventh embodiment shown in FIG. 9 substantially corresponds to the exemplary embodiment shown in FIG. 8, wherein the injection directions of the injection holes 11 to 16 are different.
  • the injection direction of the injection holes 1 1 and 12 is directed to the outside.
  • FIG. 10 shows an eighth embodiment of the invention, which is shown in FIG.
  • a distance 3 between the first and second injection hole 1 1, 12 and the third and fourth injection hole 13, 14 equal to a double opening edge distance of the injection holes 1 1, 12 and 13, 14.
  • the two injection hole pairs each other arranged opposite and also the injection directions of the respective injection holes go substantially inward.
  • At least two spray holes form a spray hole pair, which is arranged at a maximum distance 3 of a double opening edge distance from each other.
  • a positive mutual influence of the flow behavior is achieved on the inflow side 2a, resulting in an improved spray conditioning.
  • the shape (circular shape, ellipse, etc.), the direction of the injection hole axis, the inclination angle of the injection hole axis, the inner shape (cylindrical, conical, tapered, etc.) of the injection holes can be chosen differently, wherein for the injection holes of
  • Spray hole pair the condition is that the distance 3 between the two spray holes is smaller than twice the maximum opening edge distance on the inflow side and the injection hole axes of the two injection holes are arranged in mutually different directions, to avoid that the generated fuel sprays overlap.

Landscapes

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

Abstract

L'invention concerne un dispositif d'injection comprenant au moins un premier trou d'injection (11) et un deuxième trou d'injection (12) qui forment une paire de trous d'injection, le premier et le deuxième trou d'injection (11, 12) étant disposés de telle manière qu'une distance (3) entre les deux trous d'injection (11, 12) soit inférieure ou égale à une distance de bord d'ouverture maximale double (D1, D2) sur un côté d'entrée (2a) des deux trous d'injection (11, 12), et les axes (11a, 12a) du premier et du deuxième trou d'injection (11, 12) étant disposés dans des directions différentes l'un par rapport à l'autre.
EP11724597.7A 2010-07-22 2011-05-27 Dispositif d'injection à vaporisation améliorée Active EP2596230B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010031653A DE102010031653A1 (de) 2010-07-22 2010-07-22 Einspritzvorrichtung mit verbesserter Spray-Aufbereitung
PCT/EP2011/058770 WO2012010356A1 (fr) 2010-07-22 2011-05-27 Dispositif d'injection à vaporisation améliorée

Publications (2)

Publication Number Publication Date
EP2596230A1 true EP2596230A1 (fr) 2013-05-29
EP2596230B1 EP2596230B1 (fr) 2016-12-07

Family

ID=44310774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11724597.7A Active EP2596230B1 (fr) 2010-07-22 2011-05-27 Dispositif d'injection à vaporisation améliorée

Country Status (4)

Country Link
US (1) US20130181068A1 (fr)
EP (1) EP2596230B1 (fr)
DE (1) DE102010031653A1 (fr)
WO (1) WO2012010356A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118299A1 (de) * 2011-11-10 2013-05-16 Daimler Ag Einspritzdüse
WO2015034780A1 (fr) * 2013-09-06 2015-03-12 3M Innovative Properties Company Préforme de buse moulée par injection dotée de micro-composants en contre-dépouille
WO2017081755A1 (fr) * 2015-11-10 2017-05-18 日産自動車株式会社 Procédé et dispositif permettant de commander un moteur à combustion interne
JP6654875B2 (ja) * 2015-11-26 2020-02-26 日立オートモティブシステムズ株式会社 燃料噴射弁
US9964088B2 (en) * 2016-01-18 2018-05-08 Ford Global Technologies, Llc Multi-hole fuel injector with sequential fuel injection
DE102016222606A1 (de) * 2016-11-17 2018-05-17 Robert Bosch Gmbh Einspritzventil für Brennkraftmaschinen

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Publication number Priority date Publication date Assignee Title
JP3837283B2 (ja) * 2000-10-24 2006-10-25 株式会社ケーヒン 燃料噴射弁
JP3865603B2 (ja) * 2001-07-13 2007-01-10 株式会社日立製作所 燃料噴射弁
US20060157595A1 (en) * 2005-01-14 2006-07-20 Peterson William A Jr Fuel injector for high fuel flow rate applications
JP4619989B2 (ja) * 2005-07-04 2011-01-26 株式会社デンソー 燃料噴射弁
JP4906466B2 (ja) * 2006-10-16 2012-03-28 日立オートモティブシステムズ株式会社 燃料噴射弁およびそれを搭載した内燃機関の燃料噴射装置
JP4529992B2 (ja) * 2007-04-05 2010-08-25 株式会社デンソー 噴孔プレートおよびそれを備えた燃料噴射弁
JP4416023B2 (ja) * 2007-09-10 2010-02-17 株式会社デンソー 燃料噴射弁

Non-Patent Citations (1)

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Title
See references of WO2012010356A1 *

Also Published As

Publication number Publication date
EP2596230B1 (fr) 2016-12-07
DE102010031653A1 (de) 2012-01-26
US20130181068A1 (en) 2013-07-18
WO2012010356A1 (fr) 2012-01-26

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