EP1157208B1 - Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz - Google Patents

Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz Download PDF

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Publication number
EP1157208B1
EP1157208B1 EP00954296A EP00954296A EP1157208B1 EP 1157208 B1 EP1157208 B1 EP 1157208B1 EP 00954296 A EP00954296 A EP 00954296A EP 00954296 A EP00954296 A EP 00954296A EP 1157208 B1 EP1157208 B1 EP 1157208B1
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
blind hole
needle seat
nozzle
injection nozzle
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
EP00954296A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1157208A1 (de
Inventor
Friedrich Boecking
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 EP1157208A1 publication Critical patent/EP1157208A1/de
Application granted granted Critical
Publication of EP1157208B1 publication Critical patent/EP1157208B1/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

Definitions

  • the invention is based on an injection nozzle for Internal combustion engine with one, at least one injection hole having blind hole and with a s.der blind hole adjoining nozzle needle seat.
  • Blind hole injectors of the generic type have mainly in Sectionhub Brady the nozzle needle a large dispersion of the Flow resistance and thus also the injected Fuel quantity on. As a result, the emission and Consumption behavior of many with these blind hole injectors equipped internal combustion engines not optimal.
  • the invention is based on the object, a blind hole injection nozzle in which the dispersion of the Injection quantity in Generalhub Scheme the nozzle needle at different copies of a blind hole injection nozzle same Type is reduced and thus the consumption and Emission behavior of the blind hole injection nozzle according to the invention equipped internal combustion engine is improved.
  • a favorable operating characteristic of Injector aimed at as possible in all load range to achieve precise metering of the injection quantity is improved.
  • the spray hole (s) are for the throttling of the fuel.
  • the transition is between nozzle needle seat and blind hole with a radius between 0.01 mm and 0.1 mm, preferably between 0.04 mm and 0.06 mm, rounded so that on the one hand the rounding off the scattering of the Partial load behavior of the injectors already clear reduced and on the other hand, the rounding at a low cost can be produced.
  • the blind hole cylindrical perform, so that the partial load behavior of cylindrical blind hole injectors is improved.
  • a variant of an injection nozzle according to the invention sees suggest that the nozzle needle seat is frusto-conical, whereby a good sealing effect and a good centering of the Nozzle needle in the nozzle needle seat results.
  • the cone angle of Nozzle needle up to one degree, preferably 15-30 Minutes of arc, greater than the cone angle of the Nozzle needle seat, so that the sealing surface is downsized and in the area of the largest diameter of the nozzle needle is relocated.
  • Another embodiment provides that the blind hole a minisack hole or a microsack hole is so the Advantages of the invention also in these injectors are usable.
  • the transition is between Spray hole and blind hole rounded so that the Throttle effect of the injection hole is reduced and within a narrow tolerance range.
  • the object mentioned above is also achieved by a Injector for internal combustion engines with one, at least a spray hole having blind hole, thereby characterized in that the transition between the injection hole and Blind hole is rounded.
  • Figure 1 is an injection nozzle 1 with a conical Blind hole 2 shown.
  • the blind hole 2 can also be cylindrical or it may be a mini or Micro blind hole 2 act. In the latter case that is Volume of the blind hole 2 with respect to that in Figure 1 shown reduced type. This evaporates at shut off internal combustion engine less fuel in the Combustion chamber.
  • a spray hole 3 reaches the not shown Fuel from the blind hole 2 in the also not illustrated combustion chamber.
  • a frusto-conical nozzle needle seat 4 may have a cone angle of 60 °.
  • the blind hole 2 does not have to be conical but can also be cylindrical.
  • edge 7 arises during Grinding the nozzle needle seat 4.
  • the edge 7 can be a sharp ridge or a smooth edge.
  • the flow resistance of the edge 7 is significantly influenced by the nature of the same.
  • transition 8 between blind hole 2 and Nozzle needle seat 4 shown on the right side of Figure 1 is an according to the invention rounded transition 8 between blind hole 2 and Nozzle needle seat 4 shown. Rounding off the transition 8 may be circular in cross-section, for example the radius is in the range of 0.01 mm to 0.1 mm, preferably 0.04 mm to 0.06 mm.
  • the rounding according to the invention In any case, the geometry of the transition 8 between nozzle needle seat 4 and blind hole 2 at injection nozzles 1 same type only within a very narrow Tolerance range scatters; d. H. the geometry of the transition 8 is defined and so is the flow resistance the transition 8 clearly defined when the nozzle needle. 5 in the direction of a nozzle needle lift 9 from the nozzle needle seat 4 is lifted. As a result, the dispersion of the Flow resistance of various specimens of Injectors according to the invention in the region of transition 8 between nozzle needle seat 4 and blind hole 2 strong.
  • the hydraulic diameter 10 is a Blind hole injector 1 above the nozzle needle stroke. 9 applied qualitatively.
  • the hydraulic diameter 10 is a size by which any flowed through Cross sections with regard to their flow resistance be made comparable.
  • the reference is the Flow resistance of a pipe with circular Cross-section. A cross section with large hydraulic Diameter has a low flow resistance and vice versa.
  • the nozzle needle lift 9 has been divided into two areas assigned.
  • a first area extends from zero to "a”
  • the second, hereinafter referred to as Railhub Schemee Range extends from “a” to "b”.
  • At “c” is the full nozzle needle stroke reached.
  • the dashed line characteristic 12 represents a geometry of an edge 7 or a transition 8, which in comparison to the characteristic 11 a larger has hydraulic diameter and consequently lower Has throttle losses.
  • the dashed line characteristic 13 shows the effects of a geometry of a transition 7 or 8, which relative to the characteristic 11 in Figure 2 is a stronger Throttle effect has.
  • the characteristic 11 is a measured characteristic is, and that this characteristic 11 in the Control unit of the injection system is stored.
  • two of the series production removed Injectors have the characteristics 12 and 13. If now the Injectors 1 with the characteristics 12 and 13 with a Co-operate control unit in which the characteristic 11 is stored, then the actual injection quantity is correct in sectionhub Schl not with the test specimens measured optimum injection quantity according to the characteristic 11 match, so the performance and / or emission behavior the internal combustion engine is deteriorated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP00954296A 1999-07-08 2000-06-29 Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz Expired - Lifetime EP1157208B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19931761 1999-07-08
DE19931761A DE19931761A1 (de) 1999-07-08 1999-07-08 Sackloch-Einspritzdüse für Brennkraftmaschinen mit abgerundetem Übergang zwischen Sackloch und Düsennadelsitz
PCT/DE2000/002125 WO2001004490A1 (de) 1999-07-08 2000-06-29 Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz

Publications (2)

Publication Number Publication Date
EP1157208A1 EP1157208A1 (de) 2001-11-28
EP1157208B1 true EP1157208B1 (de) 2005-03-16

Family

ID=7914036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00954296A Expired - Lifetime EP1157208B1 (de) 1999-07-08 2000-06-29 Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz

Country Status (7)

Country Link
US (1) US6695230B1 (cs)
EP (1) EP1157208B1 (cs)
JP (1) JP2003504554A (cs)
KR (1) KR100737711B1 (cs)
CZ (1) CZ295060B6 (cs)
DE (2) DE19931761A1 (cs)
WO (1) WO2001004490A1 (cs)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307873A1 (de) * 2003-02-25 2004-09-02 Robert Bosch Gmbh Sackloch- und Sitzloch-Einspritzdüse für eine Brennkraftmaschine mit einem Übergangskegel zwischen Sackloch und Düsennadelsitz
JP5976586B2 (ja) * 2013-03-29 2016-08-23 株式会社デンソー 燃料噴射ノズル
JP2014194197A (ja) * 2013-03-29 2014-10-09 Denso Corp 燃料噴射ノズル
JP6109758B2 (ja) * 2014-01-30 2017-04-05 株式会社日本自動車部品総合研究所 燃料噴射ノズル
JP7167663B2 (ja) * 2018-11-28 2022-11-09 株式会社デンソー 燃料噴射弁

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927737A (en) * 1952-04-12 1960-03-08 Bosch Gmbh Robert Fuel injection valves
US3836080A (en) * 1973-09-10 1974-09-17 Ambac Ind Fuel injection nozzle
DE2451536A1 (de) * 1974-10-30 1976-05-06 Bosch Gmbh Robert Verfahren zum aufkohlen von werkstuecken aus stahl
DE2557772A1 (de) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag Brennstoffeinspritzventil
US4417694A (en) * 1980-10-22 1983-11-29 The Bendix Corporation Injector valve with contoured valve seat and needle valve interface
DE3605082A1 (de) * 1986-02-18 1987-08-20 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3733604A1 (de) * 1987-10-05 1989-04-13 Bosch Gmbh Robert Lochkoerper fuer eine kraftstoffeinspritzventil
EP0345348A4 (en) * 1987-10-30 1992-01-08 Nauchno-Proizvodstvennoe Obiedinenie Po Toplivnoi Apparature Dvigatelei Pulverizer of diesel nozzle
DE3740283A1 (de) * 1987-11-27 1989-06-08 Man B & W Diesel Gmbh Einspritzventil
GB8827107D0 (en) * 1988-11-19 1988-12-21 Lucas Ind Plc Fuel injection nozzle
US5026462A (en) * 1990-03-06 1991-06-25 Ail Corporation Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles
JPH04314961A (ja) * 1991-04-11 1992-11-06 Nissan Motor Co Ltd 燃料噴射ノズル
JP2568323B2 (ja) * 1991-06-28 1997-01-08 株式会社日立製作所 弁座付きノズル及びその製造方法、電磁弁
DE19507188C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH09177640A (ja) * 1995-12-15 1997-07-11 Caterpillar Inc 高サック容積を有する燃料噴射器による燃焼排気ガス清浄化システムとその方法

Also Published As

Publication number Publication date
EP1157208A1 (de) 2001-11-28
DE19931761A1 (de) 2001-01-18
KR100737711B1 (ko) 2007-07-11
KR20010079756A (ko) 2001-08-22
JP2003504554A (ja) 2003-02-04
DE50009793D1 (de) 2005-04-21
WO2001004490A1 (de) 2001-01-18
US6695230B1 (en) 2004-02-24
CZ2001820A3 (cs) 2001-12-12
CZ295060B6 (cs) 2005-05-18

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