EP1017938B1 - Soupape d'injection de carburant pour moteur a combustion interne - Google Patents

Soupape d'injection de carburant pour moteur a combustion interne Download PDF

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Publication number
EP1017938B1
EP1017938B1 EP98966195A EP98966195A EP1017938B1 EP 1017938 B1 EP1017938 B1 EP 1017938B1 EP 98966195 A EP98966195 A EP 98966195A EP 98966195 A EP98966195 A EP 98966195A EP 1017938 B1 EP1017938 B1 EP 1017938B1
Authority
EP
European Patent Office
Prior art keywords
holding body
injection valve
fuel injection
fuel
peripheral wall
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
EP98966195A
Other languages
German (de)
English (en)
Other versions
EP1017938A1 (fr
Inventor
Walter Kulovits
Juergen Gottschling
Werner Teschner
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 EP1017938A1 publication Critical patent/EP1017938A1/fr
Application granted granted Critical
Publication of EP1017938B1 publication Critical patent/EP1017938B1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
  • a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
  • DE-Gbm.92 06 268.7 known fuel injector is at one in the Housing of the internal combustion engine to be supplied Holding body by means of a valve body of the injection valve axially fixed by a clamping nut.
  • the valve body faces at least one into the combustion chamber at its free end of the internal combustion engine protruding injection opening on one running in the valve body and in the holding body Adjacent fuel inlet channel and by means of a movable Valve member within the valve body with this is connectable.
  • the fuel inlet channel is in the holding body thereby by one to the lower one, facing the valve body End face of the holding body opening axial longitudinal bore and a radial cross hole intersecting this, the inlet opening of the transverse bore on the radial Circumferential wall surface of the holding body a lateral Pressure connection for one from a high pressure fuel pump Laxative fuel supply line forms.
  • Laxative fuel supply line lies on the one formed at the inlet opening of the transverse bore side pressure connection to a pressure port on the external fuel supply line with the holding body combines.
  • This pressure port is in tension screws Axial direction and radially to the axis of the holding body against this clamped, the holding body these clamping forces must completely absorb.
  • the known fuel injection valve has the disadvantage that very high static stresses occur in the area of the intersection of the holes between the vertical longitudinal bore and the horizontal transverse bore of the fuel channel within the holding body due to the clamping forces of the pressure port to be absorbed. With these static loads, it is of great importance whether they cause compressive or tensile stresses in the holding body, with the known fuel injection valve the force introduction axis only forming a line on the circumferential wall and thus producing very large tensile stresses in the area of the intersection of the bores, which thus the permissible pressure threshold in reduce this area.
  • the high static stresses which occur in particular as tangential tensile stresses in the area of the intersection of the bores, lead to long-term breaks in the area of the bore intersection at very high operating loads on the fuel injection valve, in particular at high fuel pressures of over 1800 bar, and thus to a failure of the fuel injection valves in question, so that these are not suitable for use on injection systems working with very high fuel injection pressures.
  • the risk of component failure on the holding body is further exacerbated by vibrational stress, for example by a pulsating internal pressure in the fuel channel in cooperation with the high internal fuel pressure within the fuel channel and the static preload in the holding body.
  • the fuel injector according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that a Line pressure as in the known holding body avoided can be and compared to the intersection of the holes Fuel inlet channel in the holding body two line contacts on the opposite side of the pressure port radial peripheral wall surface of the holding body laterally offset to intersect the holes. there this is advantageously done by providing a Deformation of the peripheral surface of the holding body on its lateral pressure connection opposite radial Peripheral wall portion. This way, within the Deformation and stress range in the amount of Hole intersection to widen the hole counteracting voltage torque generated. This Stress torque is derived from the resulting Forces formed on the holding body, the clamping force of the Counteract the pressure port on the side pressure connection.
  • the side pressure connection on the holding body opposite indentation is preferably as Material removal from the radial peripheral wall of the holding body trained, but it is alternatively also possible to be included in the original shaping of the holding body.
  • the removal of material from the indentation on the holding body is involved preferably designed as a bevel, the between the surface grinding and the rest of the radial Circumferential wall region of the holding body formed Transition edges outside the force transmission axis on lateral pressure connection.
  • the lateral pressure connection on the holding body can as in Embodiment shown, perpendicular to the axis of the Holding body may be arranged, however, is also alternative an inclined arrangement possible. Furthermore, in Embodiment shown a surface grinding and described, the indentations on the circumference of the holding body can alternatively also other forms, for example have spherical or curved surfaces.
  • Fuel injection valve for internal combustion engines is in of the drawing and is shown in the following Description approaching explained.
  • FIG. 1 shows a longitudinal section through a Holding body of the fuel injector according to the invention and FIG. 2 shows a cross section of the holding body of the figure 1 along lines II.
  • Fuel injection valve is essential to the invention Representation of a holding body 1 of the Fuel injector limited.
  • This holding body 1 has a cylindrical basic shape, on the upper axial end face 3 in a manner not shown Tension screw or claw that attacks the holding body 1 with its lower end face 5 axially against one shown valve body clamped.
  • Fuel inlet channel 7 is provided, which consists of one of the lower end face 5 outgoing axial longitudinal bore 9 and one of these intersecting radial transverse bore 11 is formed is.
  • the inlet opening forms the radial one Cross bore 11 on the radial peripheral wall surface of the Holding body 1 has a lateral pressure connection 13.
  • This lateral pressure connection 13 has an outward directional conical cross-sectional expansion of the radial Cross bore 11 into which a pressure connection sleeve 15th is used, whose conical inside diameter as Recording area for a pressure port one Fuel supply line is used by a non High-pressure fuel pump shown starting at the lateral pressure connection 13 of the holding body 1 opens and it is supplied with high pressure fuel.
  • a valve spring of the Fuel injector is used and one Leakage hole 19 leads away.
  • the counterforce F counteracting the clamping force 23 is now divided into two force components running at right angles to one another, of which a force component F y runs perpendicular to the force introduction axis 23 and a force component F x in the direction of the force introduction axis 23 and its clamping force.
  • a resulting force component F res arises at the transition edges 25. a, which points in the direction of the longitudinal bore 9 in the holding body 1 and thus generates an advantageous compressive stress component in the holding body 1, which counteracts a possible widening of the longitudinal bore 9 or transverse bore 11 due to the high internal fuel pressure.

Landscapes

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

Claims (6)

  1. Injecteur de carburant pour des moteurs à combustion interne, comprenant un corps de support (1) pouvant être placé dans un carter du moteur à combustion interne et attelé à un corps de soupape saillant dans la chambre de combustion du moteur à combustion interne, et dans lequel est prévu un canal d'amenée de carburant (7) vers une ouverture d'injection au niveau du corps de soupape, le canal d'amenée de carburant (7) étant formé dans le corps de support (1) par un perçage longitudinal (9) et un perçage transversal (11) coupant ce dernier, dont l'ouverture d'admission forme une prise de pression (13) latérale pour une conduite d'alimentation en carburant sur une paroi périphérique radiale du corps de support (1), le corps de support (1), dans la zone de sa surface de paroi périphérique radiale en regard de la prise de pression (13) latérale, présentant un creux (21) orienté radialement vers l'intérieur, qui présente des bords de passage (25) vers le reste de la paroi périphérique radiale du corps de support (1),
    caractérisé en ce que
    les bords de passage (25) s'étendent à l'extérieur d'un axe d'engagement de force (23) de la prise de pression (13) latérale et servent de lignes de serrage par pression pour le corps de support (1).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le creux (21) est formé par enlèvement de matière de la paroi périphérique radiale du corps de support (1).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    l'enlèvement de matière présente la forme d'une coupe superficielle.
  4. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le perçage transversal (11) du canal d'amenée de carburant (7) s'étend dans le corps de support (1) à l'angle droit de l'axe longitudinal de celui-ci.
  5. Injecteur de carburant selon les revendications 1 et 3,
    caractérisé en ce que
    la coupe superficielle (21) est disposée à l'angle droit de l'axe d'engagement de force (23) de la prise de pression (13) latérale.
  6. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    les axes des bords de passage (25) entre le creux (21) et le reste de la zone de paroi périphérique radiale du corps de support (1) s'étendent parallèlement à l'axe longitudinal du corps de support (1).
EP98966195A 1998-04-01 1998-12-07 Soupape d'injection de carburant pour moteur a combustion interne Expired - Lifetime EP1017938B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19814501A DE19814501A1 (de) 1998-04-01 1998-04-01 Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19814501 1998-04-01
PCT/DE1998/003579 WO1999050553A1 (fr) 1998-04-01 1998-12-07 Soupape d'injection de carburant pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1017938A1 EP1017938A1 (fr) 2000-07-12
EP1017938B1 true EP1017938B1 (fr) 2003-10-15

Family

ID=7863180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966195A Expired - Lifetime EP1017938B1 (fr) 1998-04-01 1998-12-07 Soupape d'injection de carburant pour moteur a combustion interne

Country Status (5)

Country Link
US (1) US6382186B1 (fr)
EP (1) EP1017938B1 (fr)
JP (1) JP2002500727A (fr)
DE (2) DE19814501A1 (fr)
WO (1) WO1999050553A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7021291B2 (en) * 2003-12-24 2006-04-04 Cummins Inc. Juncture for a high pressure fuel system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845748A (en) * 1972-09-29 1974-11-05 Mack Trucks Fuel injection nozzle holder installation
ES480129A1 (es) * 1978-07-01 1980-01-16 Lucas Industries Ltd Boquilla de inyeccion de combustible para motores de encen- dido por compresion.
ATE36906T1 (de) * 1984-08-08 1988-09-15 Fischer Ag Georg Anbohrformstueck zum anschluss einer abzweigleitung.
US4846406A (en) * 1987-12-04 1989-07-11 Wade Manufacturing Co. Micro flow control valve for irrigation systems and method
DE9206268U1 (de) 1992-05-09 1993-09-09 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffzuleitungseinrichtung für eine Einspritzdüse
DE4239173C1 (en) * 1992-11-21 1993-09-02 Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De Cylinder-head for fuel-injection engine - has pressure pipe passing through clamping screw and with union at protruding end for injection pipe
US6126208A (en) * 1997-03-03 2000-10-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same
DE19728111A1 (de) * 1997-07-02 1999-01-07 Bosch Gmbh Robert Kraftstoffeinspritzsystem

Also Published As

Publication number Publication date
DE59809937D1 (de) 2003-11-20
DE19814501A1 (de) 1999-10-07
WO1999050553A1 (fr) 1999-10-07
US6382186B1 (en) 2002-05-07
EP1017938A1 (fr) 2000-07-12
JP2002500727A (ja) 2002-01-08

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