EP1440238B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1440238B1
EP1440238B1 EP02769886A EP02769886A EP1440238B1 EP 1440238 B1 EP1440238 B1 EP 1440238B1 EP 02769886 A EP02769886 A EP 02769886A EP 02769886 A EP02769886 A EP 02769886A EP 1440238 B1 EP1440238 B1 EP 1440238B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve
fuel
projection
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
EP02769886A
Other languages
German (de)
English (en)
Other versions
EP1440238A1 (fr
Inventor
Volker Holzgrefe
Günther HOHL
Michael HÜBEL
Jürgen Stein
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 EP1440238A1 publication Critical patent/EP1440238A1/fr
Application granted granted Critical
Publication of EP1440238B1 publication Critical patent/EP1440238B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • an outwardly opening fuel injection valve which has a conical sealing seat.
  • the valve needle has a central bore, which opens into a pressure chamber upstream of the pressure chamber.
  • An actuator which is designed as a piezoelectric actuator, is supported on the one hand against a nozzle body and on the other hand against a non-positively connected to the valve needle pressure shoulder.
  • a return spring holds the valve needle in a closed position. Upon excitation of the actuator, the valve needle is opened by longitudinal expansion thereof against the closing force of the return spring and sprayed fuel.
  • a disadvantage of the DE 195 34 445 A1 known fuel injection valve is in particular that the injected into the combustion chamber of the internal combustion engine fuel jet is conical and symmetrical to a longitudinal axis of the fuel injection valve. An oblique injection as well as an asymmetric deformation of the Cone jet, for example, to compensate for a tight installation position of the fuel injection valve is not possible here.
  • JP 04 179855 A discloses an air pressure valve.
  • an air jet is introduced from a partial opening of the nozzle with a tip of the conical valve seat disposed within the valve seat.
  • the tip is shaped to form a small orifice angle jet while another airflow is introduced from a partial orifice of the needle, the tip of the conical valve seat being substantially flush with the valve end Valve front is when the valve has maximum lift.
  • the airflow has a large opening angle.
  • the opening angle of the fuel spray injected from an injection nozzle is small, the fuel is injected along an air jet. As a result, a fuel spray having a small injection angle is partially formed. If the opening angle of the injected fuel jet is large, the injected fuel no longer runs along the air jet, but merges with the air jet to form a conical overall jet.
  • DE 44 05 921 A1 relates to an injector with a nozzle orifice completely or partially enclosing deflector, which has the task of deflecting an emerging from the nozzle rotationally symmetric beam such that the combustion chamber of the engine is uniformly detected by the fuel.
  • the injection nozzle is characterized in that at the level of the nozzle orifice Ablenker is arranged, which deflects the injection jet according to the nozzle installation position and the combustion chamber geometry in order to achieve a desired fuel distribution.
  • the deflector may also be a ringwall surrounding the nozzle orifice and giving the beam axis a new direction. The ringwall can be interrupted at certain points in order to achieve a desired fuel distribution in the combustion chamber.
  • U.S. 5,577,473 discloses a fuel injector for supplying a fuel / gas mixture into a combustion chamber of an internal combustion engine. This works with charge stratification in the combustion chamber and through a spark plug that ignites the fuel or fuel / air mixture introduced.
  • the fuel or the fuel / air mixture is injected under two jets in the combustion chamber.
  • the first jet is in the shape of an umbrella or cone and passes the spark plug, while the second jet, branched off from the first jet, brushes the spark plug.
  • the branch of the second jet is achieved by a recess of the guide surface of the injection valve body at the discharge end of the fuel injection valve. Thereby, a fuel-rich fuel / air mixture is provided in the vicinity of the spark of the spark plug.
  • the problem to be solved is to design a fuel injector which can also be used in narrow installation spaces and which can deform the fuel jet with the simplest means so that the spark plug is not injected directly.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that by simple measures on the contour of the nozzle body an oblique injection at any angle ⁇ and a targeted deformation of the injected mixture cloud is possible.
  • a projection which partially or completely surrounds the sealing seat, which projection can be designed in accordance with the requirements of the shape and direction of the fuel jet.
  • the projection has a recess whose longitudinal axis is inclined relative to a longitudinal axis of the fuel injection valve. By a more or less strong inclination of the axes against each other, any injection angle can be realized.
  • the projection is annular.
  • the projection is either integrally formed with the nozzle body in a simple manner or fixed thereto by means of a suitable technique such as welding or soldering.
  • FIG. 1 illustrated first embodiment of a fuel injection valve 1 according to the invention is carried out in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression, spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a housing body 2 and a nozzle body 3, in which a valve needle 4 is arranged.
  • the valve needle 4 is available a valve closing body 5 in operative connection, which cooperates with a valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an outwardly opening fuel injection valve 1.
  • the fuel injection valve 1 has an actuator 7, which in the exemplary embodiment is designed as a piezoelectric actuator 7.
  • the actuator is supported, on the one hand, on the housing body and, on the other hand, on a shoulder 8 operatively connected to the valve needle 4. Downstream of the shoulder 8, a return spring 9 is arranged, which in turn is supported on the nozzle body 3.
  • the valve needle 4 has a fuel channel 10, through which the fuel supplied by an inlet-side central fuel supply 11 is led to the sealing seat.
  • a swirl chamber 12 is formed, into which the fuel channel 10 opens.
  • the shoulder 8 In the idle state of the fuel injection valve 1, the shoulder 8 is acted upon by the force of the return spring 9 against the stroke direction so that the valve closing body 5 is held on the valve seat surface 6 in sealing engagement. Upon excitation of the piezoelectric actuator 7, this expands in the axial direction against the spring force of the return spring 9, so that the shoulder 8 is moved in the stroke direction with the valve needle 4, which is non-positively connected to the shoulder 8.
  • the valve closing body 5 lifts off from the valve seat surface 6, and the guided over the fuel passage 10 fuel is hosed.
  • the valve closing body 5 is seated on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • the fuel injection valve 1 at a downstream end 13 on a valve closing body 5 at least partially comprehensive projection 14.
  • the projection 14 is designed so that it completely encloses the valve closing body 5 and thereby forms an annular structure.
  • the projection 14 has a recess whose longitudinal axis is inclined relative to a longitudinal axis of the fuel injection valve 1.
  • the recess is formed obliquely conical in the embodiment and expands towards the combustion chamber.
  • the projection 14 may be integrally formed with the downstream end 13 and with the nozzle body 3 of the fuel injection valve 1, as shown in the first embodiment, or subsequently attached by means of a suitable technique such as soldering or welding.
  • Fig. 2 shows a sectional view of an embodiment of a not inventively designed fuel injector 1.
  • the same components are provided with matching reference numerals.
  • the fuel injection valve 1 can be designed identically to the first exemplary embodiment in the second exemplary embodiment, so that a repetitive description of already explained components is unnecessary.
  • the projection 14, which forms an annular structure in the first embodiment, is formed only in a position of the downstream end 13 of the fuel injection valve 1 in the form of a pin 17.
  • Fig. 3 is the downstream end 13 of the fuel injection valve 1 according to the in Fig. 2 Shown with III section shown in a rotated by 90 ° view, whereby the extension of the pin 17 is illustrated.
  • the pin 17 may be formed integrally with the nozzle body 3 or subsequently fixed, for example by welding or soldering to this.
  • Fig. 4 shows a mixture cloud 15, which by means of in Fig. 2 illustrated embodiment of the fuel injection valve 1 according to the invention is injected into the combustion chamber of the internal combustion engine. Due to the shielding effect of the pin 17, the mixture cloud 15 in this area a dent 16, which may for example be arranged so that a arranged in the vicinity of the fuel injection valve 1 spark plug is not injected directly, whereby the coking of the spark plug is reduced.
  • the mixture cloud 15 can also be further deformed by the arrangement of a plurality of pins 17 at arbitrary locations of the discharge end 13 of the fuel injection valve 1, for example, if several spark plugs are present or the arrangement of the intake and exhaust valves make this seem necessary.
  • the invention is not limited to the illustrated embodiments and z. B. also for Electromagnetically actuated fuel injection valves 1 applicable.

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

Soupape d'injection de carburant (1) pour l'injection de carburant dans la chambre à combustion d'un moteur à combustion interne, comprenant un pointeau de soupape (4) guidé dans un corps d'injecteur (3), ledit pointeau étant commandé par un actionneur et sollicité par un ressort de rappel (9) de telle façon qu'un corps de fermeture de soupape (5), en liaison coopérante avec le pointeau de soupape (4), prenne appui de manière étanche contre la surface du siège de soupape (6). Un rebord (14) est prévu à l'extrémité aval (13) de la soupape d'injection de carburant (1) et est en saillie par rapport au corps de fermeture (5) de ladite soupape d'injection de carburant (1).

Claims (6)

  1. Soupape d'injection de carburant (1) pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne, comprenant une aiguille de soupape (4) disposée dans un corps d'injecteur (3), qui peut être actionnée par un actionneur (7) et qui est sollicitée par un ressort de rappel (9) de telle sorte qu'un corps de fermeture de soupape (5) en liaison fonctionnelle avec l'aiguille de soupape (4), tourné vers la chambre de combustion, soit maintenu dans l'état non actionné de l'actionneur (7) en appui hermétique contre une surface de siège de soupape (6),
    une saillie (14) dépassant du corps de fermeture de soupape (5) étant réalisée à une extrémité côté évacuation (13) de la soupape d'injection de carburant (1),
    caractérisée en ce que
    la saillie (14) présente un évidement dont l'axe longitudinal est incliné par rapport à un axe longitudinal de la soupape d'injection de carburant (1) suivant un angle (Y), de telle sorte que l'évidement présente une contre-dépouille.
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la saillie (14) entoure au moins en partie le corps de fermeture (5).
  3. Soupape d'injection de carburant selon la revendication 2,
    caractérisée en ce que
    la saillie (14) est réalisée sous forme annulaire.
  4. Soupape d'injection de carburant selon la revendication 3,
    caractérisée en ce que
    l'évidement est réalisé sous forme conique et s'élargit vers la chambre de combustion.
  5. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que
    la saillie (14 ; 17) est réalisée d'une seule pièce avec le corps d'injecteur (3) de la soupape d'injection de carburant (1).
  6. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que
    la saillie (14 ; 17) est fixée par brasage ou soudage à l'extrémité côté évacuation (13) de la soupape d'injection de carburant (1).
EP02769886A 2001-10-24 2002-08-22 Soupape d'injection de carburant Expired - Lifetime EP1440238B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10152415 2001-10-24
DE10152415A DE10152415A1 (de) 2001-10-24 2001-10-24 Brennstoffeinspritzventil
PCT/DE2002/003073 WO2003038272A1 (fr) 2001-10-24 2002-08-22 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1440238A1 EP1440238A1 (fr) 2004-07-28
EP1440238B1 true EP1440238B1 (fr) 2011-10-12

Family

ID=7703529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02769886A Expired - Lifetime EP1440238B1 (fr) 2001-10-24 2002-08-22 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US7581686B2 (fr)
EP (1) EP1440238B1 (fr)
JP (1) JP4460895B2 (fr)
DE (1) DE10152415A1 (fr)
WO (1) WO2003038272A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259799A1 (de) * 2002-12-19 2004-07-29 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10359302A1 (de) * 2003-12-17 2005-07-21 Robert Bosch Gmbh Ventilkörper mit Mehrfachkegelgeometrie am Ventilstitz
DE102004004169A1 (de) 2004-01-28 2005-08-18 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004033842A1 (de) * 2004-07-13 2006-02-09 Robert Bosch Gmbh Brennstoffeinspritzventil
US8915453B1 (en) 2007-06-01 2014-12-23 Raymond C. Sherry Expansion nozzle with continuous rotating stem
US7963459B1 (en) * 2007-06-01 2011-06-21 Sherry Raymond C Self-cleaning high pressure nozzle
EP2003331A1 (fr) * 2007-06-12 2008-12-17 Siemens Aktiengesellschaft Ensemble de vanne pour soupape d'injection, et soupape d'injection
DE102009000186A1 (de) * 2009-01-13 2010-07-15 Robert Bosch Gmbh Vorrichtung zur Einspritzung von Kraftstoff
US7942349B1 (en) * 2009-03-24 2011-05-17 Meyer Andrew E Fuel injector
AU2011274314B2 (en) * 2010-06-30 2014-08-07 Orbital Australia Pty Ltd Fuel injector icing
KR101144482B1 (ko) 2010-10-06 2012-05-11 (주)제너진 엔진의 직분사 인젝터
EP2476874B1 (fr) 2011-01-13 2013-04-03 Delphi Technologies Holding S.à.r.l. Dispositif d'injection pour réactif
CN103534476B (zh) * 2011-05-13 2016-12-28 安德鲁·E·迈耶 燃料喷射器
US10273167B1 (en) 2015-02-12 2019-04-30 Raymond C. Sherry Fluid-operated nozzle
US10570865B2 (en) * 2016-11-08 2020-02-25 Ford Global Technologies, Llc Fuel injector with variable flow direction

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DE1176926B (de) 1961-06-15 1964-08-27 Bosch Gmbh Robert Ventil zur Einspritzung von Kraftstoff in das Saugrohr von Brennkraftmaschinen
DE2557772A1 (de) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag Brennstoffeinspritzventil
US4421280A (en) * 1981-09-28 1983-12-20 The Bendix Corporation Fuel injector
DE3300670A1 (de) 1982-01-23 1983-08-04 Lucas Industries P.L.C., Birmingham, West Midlands Kraftstoffeinspritzduese
IT1166995B (it) * 1982-11-25 1987-05-06 Lucas Ind Plc Ugello di iniezione di combustibile
CA1279798C (fr) * 1985-07-19 1991-02-05 Peter William Ragg Injection de carburant
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DE4405921A1 (de) 1994-02-24 1995-08-31 Fritz Prof Dr Ing Eisfeld Einspritzdüse
DE4408553C1 (de) 1994-03-14 1995-10-05 Bernd Scheffel Vorrichtung zur Gemischeinblasung für eine Brennkraftmaschine
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JP2976973B1 (ja) 1998-09-29 1999-11-10 トヨタ自動車株式会社 内燃機関用燃料噴射弁
JP4055315B2 (ja) 1999-03-17 2008-03-05 株式会社日立製作所 燃料噴射弁およびこれを搭載した内燃機関

Also Published As

Publication number Publication date
US7581686B2 (en) 2009-09-01
US20040075001A1 (en) 2004-04-22
JP4460895B2 (ja) 2010-05-12
JP2005507054A (ja) 2005-03-10
WO2003038272A1 (fr) 2003-05-08
DE10152415A1 (de) 2003-06-18
EP1440238A1 (fr) 2004-07-28

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