WO1998016736A1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

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

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Publication number
WO1998016736A1
WO1998016736A1 PCT/DE1997/001374 DE9701374W WO9816736A1 WO 1998016736 A1 WO1998016736 A1 WO 1998016736A1 DE 9701374 W DE9701374 W DE 9701374W WO 9816736 A1 WO9816736 A1 WO 9816736A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
valve
openings
fuel
internal combustion
Prior art date
Application number
PCT/DE1997/001374
Other languages
German (de)
English (en)
Inventor
Karl Hofmann
Detlev Potz
Rainer Buck
Johann Warga
Wilhelm Polach
Andreas Kreh
Manfred Koerperich
Erguen Filiz
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 WO1998016736A1 publication Critical patent/WO1998016736A1/fr

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
    • F02M61/1813—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
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • 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
    • F02M61/1826—Discharge orifices having different sizes

Definitions

  • the invention is based on a fuel injection valve for internal combustion engines according to the preamble of claim 1.
  • a piston-shaped valve member is axially displaceably guided in a blind bore of a valve body, which projects with its free end into the combustion chamber of an internal combustion engine.
  • the valve member has on its lower end face on the combustion chamber side a conical valve sealing surface with which it is used to control an injection cross section with a conical valve seat surface
  • valve body cooperates, which is formed on the inwardly projecting closed end of the blind bore.
  • a fuel pressure channel leading away from an injection line in the valve body opens onto the valve seat. Downstream of the sealing edge formed between the valve sealing surface and the valve seat, at least two injection openings lead from the wall of the valve seat surface and open into the combustion chamber of the internal combustion engine.
  • the Outlet openings of these injection openings are arranged on a common radial plane of the valve body and thereby form a horizontal row of spray holes.
  • the known Kraf fuel injection valve has the disadvantage that different injection jets can be poorly represented due to the limited number of injection openings, so that the fuel-air mixture in the combustion chamber cannot be adjusted as optimally as modern internal combustion engines for optimal, low-emission combustion need.
  • the fuel injection valve of the seat hole type for internal combustion engines with the characterizing features of claim 1 has the advantage that by dividing the predetermined injection cross-section at the injection openings to at least two in the axial direction
  • Valve body superimposed rows of spray holes a better adaptation of the spray formation to the respective requirements is possible, so that the mixture preparation and combustion in the combustion chamber of the internal combustion engine can be optimized in particular with regard to the emission values. This becomes possible since the number of injection openings can be doubled by the provision of the second row of spray holes, individual injection openings now being able to be designed and shaped flexibly for different jet positions.
  • the cross-section of previously only one injection opening is now divided into at least two injection openings (spray hole bores), the superimposed injection openings of the two rows of spray holes, for example, directly can be arranged in parallel one above the other and have an injection cross-section of the same size (spray hole diameter).
  • the spray hole diameters can also be of different sizes, the smaller bore diameter preferably corresponding to the minimum injection quantity for the lower idling speed of the internal combustion engine.
  • the values of the spray angles formed between the individual injection bores of a common row of spray holes can also differ between the rows of spray holes arranged one above the other, a course diverging in the direction of injection having the advantage that a larger air area in the combustion chamber is mixed with fuel.
  • a spray angle that joins in the direction of injection achieves a higher penetration force and thus greater jet penetration depth into the combustion chamber.
  • a further possibility of the improved jet adaptation is provided by displacing the injection openings arranged one above the other, the injection opening, which is smaller in cross section, being offset in the swirl direction of the fresh gas flowing around the combustion chamber by a certain angle ⁇ in the circumferential direction to the valve body.
  • This angle ⁇ is advantageously a maximum of 10 °.
  • injection openings provided in a common row of spray holes can advantageously be arranged such that two adjacent injection jets each have a common point of impact at the Combustion chamber trough, in which case all injection openings have the same inlet conditions.
  • a further possibility of varying the injection openings and thus the injection jets is the arrangement of the second row of spray holes, which can be provided both in the valve seat surface and in the region of the closed blind hole of the bore in the valve body.
  • the arrangement of several rows of spray holes according to the invention can be carried out on single-stage injection valves or alternatively on two-stage injection valves, e.g. be provided on so-called 2-spring holder injection valves.
  • FIG. 1 shows a longitudinal section through the valve body of the injection valve
  • FIG. 2 shows a first exemplary embodiment in a detail from FIG. 1, in which the second row of spray holes leads away from the valve seat surface
  • FIG. 3 shows a second exemplary embodiment analogous to the representation of the figure 2, in which the second, lower spray hole row leads away from the blind hole of the valve bore
  • FIG. 4 shows a third exemplary embodiment, in which the spray angles of the individual spray hole rows diverge
  • the FIG 5 shows a fourth exemplary embodiment in which the spray angles of the rows of spray holes converge
  • Figure 6 in which the injection openings arranged in a common row of spray holes are arranged so that the injection jets converge.
  • the fuel injection valve for internal combustion engines shown in FIG. 1 with its components essential to the invention has a rotationally symmetrical valve body 1, which is fastened with its upper end to a valve holding body, not shown, and which with its lower free end 3 into a combustion chamber, likewise not shown protrudes to be supplied to the internal combustion engine.
  • a valve body 1 Provided in the valve body 1 is an axial blind bore 5 extending from the upper end surface remote from the combustion chamber, in which a piston-shaped valve member 7 is guided so as to be axially displaceable.
  • the valve member 7 has a conical valve sealing surface 9 on its combustion chamber end, with which it interacts to control an injection cross section with a conical valve seat surface 11 on the valve body 1, which is formed at the inwardly projecting end of the blind bore 5.
  • a fuel inlet channel 13 which is connected to an injection line, is provided in the valve body 1 and is connected via a between the
  • Valve member 7 and the wall of the bore 5 formed annular gap 15 extends to the valve seat surface 11.
  • Injection openings 17 lead from the valve seat surface 11 into the combustion chamber of the internal combustion engine, with several opening Injection openings 17, preferably bores, arranged in a common radial plane of valve body 1 form a row of spray holes.
  • the fuel injection valve operates in a known manner, the valve member 7 being closed by a valve spring in the closed position, i.e. when the injection valve is depressurized. is held in contact with the valve seat 11 and is lifted from the valve seat 11 against the restoring force of the valve spring when the high-pressure fuel is supplied, so that the flow cross-section to the injection openings 17 is released and the fuel flows from the inlet channel 13, 15 into the combustion chamber of the internal combustion engine can.
  • the injection openings 17 of the spray row 19 above and the spray row 21 below lead away from the valve seat surface 11 and are covered by the valve sealing surface 9.
  • the bores of the injection openings 17 of the upper row of spray holes 19 are arranged parallel to the injection bores 17 of the lower row of spray holes 21.
  • the second exemplary embodiment shown in FIG. 3 differs from the first exemplary embodiment in the arrangement of the second, lower spray hole row 21, which is now provided in the region of the closed blind hole 23 of the bore 5 which adjoins the valve seat surface 11 downstream.
  • FIGS. 4 and 5 show exemplary embodiments in which the angles of the injection openings 17 of the upper spray hole row 19 differ from the angles (spray angles) of the injection openings 17 of the lower spray hole row 21.
  • the spray angles in the third exemplary embodiment shown in FIG. 4 are designed such that the injection openings 17 of the spray hole rows 19, 21 or their axes and, as a result, the injection jet diverge in the injection direction.
  • the axes of the injection openings 17 of the spray hole rows 19, 21 in the fourth exemplary embodiment shown in FIG. 5 run towards one another, so that the individual injection jets of the spray holes lying one above the other can unite to form a common jet which then has a higher energy has greater depth of penetration.
  • the injection openings 17 arranged one above the other are offset by an angle ⁇ from one another.
  • the injection openings 17 with the smaller cross section, shown in dashed lines, are offset in the swirl direction of the gas mixture flowing around the combustion chamber by the angle ⁇ to the injection openings 17 above, the angle ⁇ being intended to be a maximum of 10 °.
  • the injection openings 17 of a row of injection holes 19 and 21 arranged in a common radial plane of the valve body 1 are each in two adjacent injection openings 17 ". divided. These adjacent injection openings 17 ′′ are arranged such that the injection jets form a common point of incidence 25 on the wall of the combustion chamber trough 27.
  • these coinciding injection jets can also be achieved by a correspondingly offset arrangement of the superimposed injection openings 17.

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 une soupape d'injection de carburant pour moteurs à combustion interne, comportant un élément (7) déplaçable dans le sens axial dans un alésage (5) d'un corps de soupape (1), qui présente à son extrémité côté chambre de combustion, une surface d'étanchéité (9) conique au moyen de laquelle il coopère avec une surface conique (11) de siège de soupape au niveau de l'extrémité de l'alésage (5), en porte-à-faux vers l'intérieur, pour piloter une section transversale d'injection. Un canal d'amenée de carburant (13, 15) qui traverse le corps de la soupape (1), débouche au niveau du siège de soupape (11) et au moins un orifice d'injection (17) mène de la surface du siège de soupape (11) jusque dans la chambre de combustion du moteur à combustion interne. A cet effet, il est prévu au moins deux rangées de trous d'injection des orifices d'injection (17), disposées l'une au-dessus de l'autre dans le sens axial par rapport à l'élément (7) de soupape.
PCT/DE1997/001374 1996-10-15 1997-07-01 Soupape d'injection de carburant pour moteurs a combustion interne WO1998016736A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996142513 DE19642513A1 (de) 1996-10-15 1996-10-15 Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19642513.1 1996-10-15

Publications (1)

Publication Number Publication Date
WO1998016736A1 true WO1998016736A1 (fr) 1998-04-23

Family

ID=7808813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001374 WO1998016736A1 (fr) 1996-10-15 1997-07-01 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (2)

Country Link
DE (1) DE19642513A1 (fr)
WO (1) WO1998016736A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925380A1 (de) * 1999-06-02 2000-12-07 Volkswagen Ag Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10123859B4 (de) * 2001-05-16 2007-06-21 Robert Bosch Gmbh Brennstoffeinspritzventil
JP3865603B2 (ja) * 2001-07-13 2007-01-10 株式会社日立製作所 燃料噴射弁
DE10143026A1 (de) * 2001-09-01 2003-03-20 Bayerische Motoren Werke Ag Verfahren zur Gemischbildung bei einer direkt einspritzenden, fremdgezündeten Brennkraftmaschine
DE10210976A1 (de) * 2002-03-13 2003-09-25 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2851792B1 (fr) * 2003-02-28 2007-02-09 Magneti Marelli Motopropulsion Injecteur de carburant pour moteur a combustion interne
DE10354467A1 (de) * 2003-11-21 2005-06-09 Robert Bosch Gmbh Brennstoffeinspritzventil
WO2005073546A1 (fr) * 2004-02-02 2005-08-11 Siemens Aktiengesellschaft Corps de buse et soupape
DE102004041031A1 (de) * 2004-08-25 2006-03-02 Audi Ag Kraftstoff-Einspritzventil mit Strahldurchdringung
DE102004050048A1 (de) * 2004-10-14 2006-04-27 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2881185A1 (fr) * 2005-01-26 2006-07-28 Magneti Marelli Motopropulsion Injecteur de carburant et moteur comprenant un tel injecteur
DE102006063075B3 (de) 2006-05-04 2023-08-10 Mercedes-Benz Group AG Verfahren zum Betrieb einer Brennkraftmaschine und Brennkraftmaschine für ein solches Verfahren
DE102006020642B4 (de) 2006-05-04 2019-05-23 Daimler Ag Verfahren zum Betrieb einer Brennkraftmaschine und Brennkraftmaschine für ein solches Verfahren
BRPI0703812B1 (pt) * 2007-08-24 2018-07-24 Magneti Marelli Sistemas Automotivos Ind. E Com. Ltda Atomizador para sistemas de injeção de combustível
DE102011016234A1 (de) 2011-04-06 2012-10-11 Mtu Friedrichshafen Gmbh Brennkraftmaschine mit Einspritzventil
US9546633B2 (en) * 2012-03-30 2017-01-17 Electro-Motive Diesel, Inc. Nozzle for skewed fuel injection
DE102013212142A1 (de) * 2013-06-25 2015-01-08 Robert Bosch Gmbh Düsenbaugruppe für einen Kraftstoffinjektor sowie Kraftstoffinjektor
DE102015205703A1 (de) 2015-03-30 2016-10-06 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen und Verwendung eines Kraftstoffeinspritzventils
DE102016224084B4 (de) 2016-12-05 2019-04-18 Robert Bosch Gmbh Kraftstoffinjektor

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS58190568A (ja) * 1982-04-30 1983-11-07 Isuzu Motors Ltd 燃料噴射ノズル
DE3920315A1 (de) * 1988-07-06 1990-01-11 Avl Verbrennungskraft Messtech Kraftstoffeinspritzduese
DE4303813C1 (de) 1993-02-10 1994-06-30 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
WO1994027042A1 (fr) * 1993-05-07 1994-11-24 Lucas Industries Public Limited Company Injecteurs de carburant
US5540200A (en) * 1993-12-28 1996-07-30 Nissan Motor Co., Ltd. Fuel injection valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190568A (ja) * 1982-04-30 1983-11-07 Isuzu Motors Ltd 燃料噴射ノズル
DE3920315A1 (de) * 1988-07-06 1990-01-11 Avl Verbrennungskraft Messtech Kraftstoffeinspritzduese
DE4303813C1 (de) 1993-02-10 1994-06-30 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
WO1994027042A1 (fr) * 1993-05-07 1994-11-24 Lucas Industries Public Limited Company Injecteurs de carburant
US5540200A (en) * 1993-12-28 1996-07-30 Nissan Motor Co., Ltd. Fuel injection valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 035 (M - 276) 15 February 1984 (1984-02-15) *

Also Published As

Publication number Publication date
DE19642513A1 (de) 1998-04-16

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