EP0067143A1 - Buse d'injection de carburant - Google Patents

Buse d'injection de carburant Download PDF

Info

Publication number
EP0067143A1
EP0067143A1 EP82890062A EP82890062A EP0067143A1 EP 0067143 A1 EP0067143 A1 EP 0067143A1 EP 82890062 A EP82890062 A EP 82890062A EP 82890062 A EP82890062 A EP 82890062A EP 0067143 A1 EP0067143 A1 EP 0067143A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
spray
fuel injection
recess
needle
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.)
Withdrawn
Application number
EP82890062A
Other languages
German (de)
English (en)
Inventor
Peter Dipl.-Ing. Dr. Herzog
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.)
Friedmann and Maier AG
Original Assignee
Friedmann and Maier AG
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 Friedmann and Maier AG filed Critical Friedmann and Maier AG
Publication of EP0067143A1 publication Critical patent/EP0067143A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M61/1846—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
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal

Definitions

  • the invention relates to a fuel injection nozzle for internal combustion engines with an injection needle having a sealing cone that controls spray openings and opens against the flow direction of the fuel and a closing force, and with a nozzle body that accommodates the nozzle needle and that defines a pressure chamber and a blind hole, in which a nozzle body with the sealing cone interacting, separating pressure chamber and blind hole, preferably conical needle seat is arranged, wherein preferably arranged in the nozzle body, covered by the sealing cone and sealable from the pressure chamber in the needle seat begin.
  • fuel injection nozzles fuel is displaced from the blind hole when the nozzle needle is closed, designs being known in which the nozzle needle closes off the blind hole volume from the combustion chamber after it has been seated on the valve seat.
  • the invention now aims to keep the wear of the nozzle body as low as possible in a fuel injection nozzle of the type mentioned at the outset without one. Restriction with regard to the exit angle of the spray openings to the nozzle axis.
  • the invention essentially consists in that the spray openings open into a recess of the nozzle body which is concentric with the axis of the nozzle needle. Due to the recess arranged in the nozzle body and concentric with the axis of the nozzle needle, the transition angle between the generatrices of the spray openings and the adjacent inner wall parts of the nozzle body can be relatively increased, so that the formation of very acute angles is avoided, which increases the service life of the dome wall or the nozzle body becomes.
  • the design is such that the recess is arranged in the region of the seat surface of the nozzle needle. With such an arrangement, a reliable separation of the blind hole volume from the combustion chamber is ensured.
  • the smallest angle between the axis of the spray openings and the wall part of the recess adjoining the spray openings is larger than the smallest angle between the axis of the spray opening and the generatrices of the inner lateral surface of the nozzle body adjacent to the recess.
  • the recess is toroidal, preferably the the circular line connecting the centers of the cross-sectional area of the torus crosses or intersects the axes of the spray openings, the maximum normal distance of this circular line from the axes of the spray opening being less than half the radius of the cross-sectional area of the torus.
  • FIG. 1 shows an axial section through a nozzle body according to the invention
  • FIG. 2 shows an enlarged representation of the dome wall region of the nozzle body according to FIG. 1
  • FIG. 3 shows an embodiment according to the prior art.
  • Fig. 1 denotes the nozzle body.
  • a blind hole 3 is provided on the end face 2 facing the combustion chamber.
  • the spray openings 4 run essentially radially to the axis 5 of the nozzle needle or the nozzle body 1. Near the blind hole 3 there is a toroidal recess 6, shown enlarged in FIG.
  • the axes of the spray openings 4 form an angle ⁇ of up to 90 ° with the axis of the nozzle body 1.
  • the dome wall 7 of the nozzle body 1 is shown enlarged.
  • the seat 8 of the nozzle needle extends here over the length a, the toroidal recess 6 being arranged within the seat 8.
  • the resulting in the training according to the prior art, as shown in Fig. 3, at large angles ⁇ acute angle ⁇ between the generators or the direction of the axis 9 of the spray openings 4 and the inner wall or dome wall 7 is by the toroidal Flattened recess so that the smallest transition angle to the wall parts mentioned is significantly increased.
  • the corresponding angle ⁇ is like from
  • FIG. 2 shows that it is significantly larger than the angle ⁇ according to FIG. 3 which results from the prior art.
  • the center 10 of the cross-sectional area of the torus 11 is located near the axis 9 of the spray openings 4, the maximum normal distance b being less than half the radius c of the cross-sectional area of the torus, as a result of which a. large angle ⁇ at the transition surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP82890062A 1981-06-10 1982-04-30 Buse d'injection de carburant Withdrawn EP0067143A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT258681 1981-06-10
AT2586/81 1981-06-10

Publications (1)

Publication Number Publication Date
EP0067143A1 true EP0067143A1 (fr) 1982-12-15

Family

ID=3536954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890062A Withdrawn EP0067143A1 (fr) 1981-06-10 1982-04-30 Buse d'injection de carburant

Country Status (1)

Country Link
EP (1) EP0067143A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389151B (de) * 1983-10-11 1989-10-25 Steyr Daimler Puch Ag Kraftstoffeinspritzduese fuer brennkraftmaschinen
EP0717227A3 (fr) * 1994-12-16 1997-05-02 Perkins Ltd Procédé pour réduire les contraintes à la jonction d'un système de canaux d'écoulement de fluide sous haute pression et jonction ainsi réalisée
WO1999053196A1 (fr) * 1998-04-09 1999-10-21 Man B & W Diesel A/S Systeme d'injection de carburant
WO2000017514A1 (fr) * 1998-09-23 2000-03-30 Siemens Aktiengesellschaft Buse d'injection de carburant
WO2004036026A1 (fr) * 2002-10-15 2004-04-29 Robert Bosch Gmbh Dispositif d'injection de carburant d'un moteur a combustion interne
DE19547423B4 (de) * 1995-12-19 2008-09-18 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2244874A (en) * 1937-04-27 1941-06-10 Fiedler Sellers Corp Fuel nozzle for solid fuel injection engines
CH402510A (de) * 1963-05-14 1965-11-15 Sulzer Ag Brennstoffeinspritzventil einer Kolbenbrennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2244874A (en) * 1937-04-27 1941-06-10 Fiedler Sellers Corp Fuel nozzle for solid fuel injection engines
CH402510A (de) * 1963-05-14 1965-11-15 Sulzer Ag Brennstoffeinspritzventil einer Kolbenbrennkraftmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389151B (de) * 1983-10-11 1989-10-25 Steyr Daimler Puch Ag Kraftstoffeinspritzduese fuer brennkraftmaschinen
EP0717227A3 (fr) * 1994-12-16 1997-05-02 Perkins Ltd Procédé pour réduire les contraintes à la jonction d'un système de canaux d'écoulement de fluide sous haute pression et jonction ainsi réalisée
DE19547423B4 (de) * 1995-12-19 2008-09-18 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
WO1999053196A1 (fr) * 1998-04-09 1999-10-21 Man B & W Diesel A/S Systeme d'injection de carburant
WO2000017514A1 (fr) * 1998-09-23 2000-03-30 Siemens Aktiengesellschaft Buse d'injection de carburant
WO2004036026A1 (fr) * 2002-10-15 2004-04-29 Robert Bosch Gmbh Dispositif d'injection de carburant d'un moteur a combustion interne
US7364099B2 (en) 2002-10-15 2008-04-29 Robert Bosch Gmbh Fuel injection device for an internal combustion engine

Similar Documents

Publication Publication Date Title
DE4039520B4 (de) Kraftstoff-Einspritzventil
EP0354905B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE3013694C2 (fr)
DE2455738C3 (de) Sprühdüse
DE2711350A1 (de) Kraftstoffeinspritzduese fuer brennkraftmaschinen
EP0551633A1 (fr) Injecteur de carburant pour moteur à combustion interne
EP0730090A2 (fr) Soupape d'injection de carburant pour moteurs à combustion interne
EP0067143A1 (fr) Buse d'injection de carburant
DE3421074A1 (de) Kraftstoffeinspritzduese
DE3423592A1 (de) Kraftstoffeinspritzduese
WO1989000244A1 (fr) Soupape d'injection
EP0890735A2 (fr) Soupape d'injection de combustible
DE10156657C2 (de) Zweistoff-Injektor
DE19507188C1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19615888C2 (de) Regelventil zur Druckreduzierung gasförmiger Stoffe
DE2040776A1 (de) Dichtung fuer ein Ventil,insbesondere fuer die Verwendung in Einspritzpumpen von Kraftfahrzeugen
DE102004055262A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE2921455A1 (de) Kraftstoffeinspritzventil fuer luftverdichtende einspritzbrennkraftmaschinen
DE3210209A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
WO1986002410A1 (fr) Buse d'injecton de combustible pour moteur a combustion
DE3740283A1 (de) Einspritzventil
EP0716226A2 (fr) Soupape d'injection de combustible pour moteurs à combustion interne
DE19843912A1 (de) Kraftstoffeinspritzdüse
DE4336972A1 (de) Kraftstoff-Einspritzdüse für Brennkraftmaschinen
EP1565650B1 (fr) Dispositif d'injection pour l'injection de carburant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT DE FR GB

17P Request for examination filed

Effective date: 19830119

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840124

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HERZOG, PETER, DIPL.-ING. DR.