EP2087228A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP2087228A1
EP2087228A1 EP07803448A EP07803448A EP2087228A1 EP 2087228 A1 EP2087228 A1 EP 2087228A1 EP 07803448 A EP07803448 A EP 07803448A EP 07803448 A EP07803448 A EP 07803448A EP 2087228 A1 EP2087228 A1 EP 2087228A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel
fuel injection
cylindrical portion
injection valve
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.)
Granted
Application number
EP07803448A
Other languages
German (de)
English (en)
Other versions
EP2087228B1 (fr
Inventor
Andreas Krause
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 EP2087228A1 publication Critical patent/EP2087228A1/fr
Application granted granted Critical
Publication of EP2087228B1 publication Critical patent/EP2087228B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M61/1853—Orifice plates
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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 a fuel injection valve according to the preamble of the main claim.
  • Stepped spray holes are currently used to protect the spray hole from deposits and to achieve a spray hole shortening at a constant spray hole thickness.
  • a fuel injection valve for fuel injection systems of internal combustion engines is known, which is a magnetic coil, one with the magnetic coil in
  • a return spring valve needle for actuating a valve closing body, which forms a sealing seat together with a formed on a valve seat body valve seat, and at least two ejection openings, which are formed in the valve seat body comprises.
  • the ejection openings are formed in the valve seat body so that they are shielded from circulating mixture flows in a combustion chamber of the internal combustion engine and have a cylindrical Abspritzloch and a thereto subsequent annular wall, which is high enough to shield each of the spray openings against the circulating in the combustion chamber flows.
  • Spray angle achieved, but with moderate beam stability.
  • the beam angle is highly dependent on the flow conditions in such a configuration.
  • valves for low-pressure injection which have sharply inclined conical injection holes.
  • the mass sprayed as a thin film atomises much better than the main beam, the overall result is an SMD improvement, but this geometry is not suitable for fuel injection valves with stepped spray holes and the transverse flow, which is primarily generated by the hole angle ⁇ of the spray hole. is inevitably coupled with the spray angle ⁇ .
  • the fuel injection valve according to the invention with the characterizing feature of the main claim has the advantage that an improvement of the SMDs, in particular for
  • Intake manifold injection valves is achieved, and there is the possibility of a spray angle increase in high-pressure injection valves by means of the configuration according to the invention in order to further reduce the beam penetration into the combustion chamber can.
  • the cross flow required for the principle used for beam expansion is not necessarily coupled to the spray angle ⁇ .
  • the configuration of the injection hole according to the invention can be used in already manufactured with stepped spray holes fuel injectors, with only a corresponding modification of the hole axes is necessary.
  • Another advantage of the fuel injection valve according to the invention is that the circumferential direction of the fluid similar to the swirl valve when leaving the spray hole a causes additional expansion of the beam beyond the geometric angle addition.
  • FIG. 1 is a schematic cross section through a fuel injection valve according to the prior
  • Fig. 2a, 2b is a schematic cross section through a
  • valve seat body according to the prior art or an image of a jet geometry generated by the injection hole along the line A-A of Fig. 2a;
  • valve seat body a schematic cross section through a valve seat body according to the invention or a
  • Fig. 1 shows a schematic cross section through a fuel injection valve 1 according to the prior art, to which the essential components of the valve will be briefly explained.
  • the fuel injection valve 1 is embodied in the form of a fuel injection valve 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 nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4 which cooperates with a valve seat body 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an inwardly opening electromagnetically actuable fuel injection valve 1, which has an injection hole 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 and are based on a connecting member 29 from.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • the valve needle 3 is guided in a valve needle guide 14, which is designed disc-shaped.
  • Valve needle 3 in conjunction, which is connected by a weld 22 to the first flange.
  • a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • valve needle guide 14 in the armature 20 and in the valve seat body 5 run fuel channels 30a, 30, which conduct the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the injection hole 7 in the valve seat body 5.
  • the fuel injection valve 1 is sealed by a seal 28 against a manifold, not shown.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon via the first flange 21 on the valve needle 3 by the return spring 23 counter to its stroke direction so that the valve seat body 4 is held on the valve seat surface 6 in sealing engagement. Upon energization of the magnetic coil 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke is determined by a located in the rest position between the inner pole 13 and the armature 20 working gap 27. The armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus the Valve needle 3 also in the stroke direction with.
  • valve closing body 4 which is in operative connection with the valve needle 3, lifts off from the valve seat surface 6 and the fuel passing over the fuel channels 30a, 30b to the injection hole 7 is hosed down. If the coil current is turned off, the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the first flange 21 from the inner pole 13, causing the valve needle 3 moves against the stroke direction. As a result, the valve closing body 4 is seated on the valve seat surface 6, and the fuel injection valve 1 is closed.
  • FIG. 2 a shows a schematic cross section through a valve seat body 5 according to the prior art.
  • the valve seat body 5 has an inlet-side end face 34 and an opposite discharge-side end face 35.
  • the injection hole 7 enters at the inflow-side end face 34 obliquely to this in an angle ⁇ formed with it via an inlet opening 36 in the valve seat body 5 and occurs at the discharge-side end face 35 at an angle ⁇ , which the longitudinal axis of the injection hole 7 with the end face 35th forms, again.
  • the injection hole 7 thus has a strongly inclined and conical shape.
  • the inclination angle ⁇ or ⁇ of the injection hole leads on the one hand to the fact that the flow at the injection hole inlet separates and thus creates a two-phase flow in the injection hole.
  • the inlet flow is v divided into an axial component v ax and a radial component v r.
  • the angle between v e m and v ax (90 ° - ⁇ ) is mainly due to the angle ⁇ , but can also be due to a forced transverse flow of the hole and thus
  • Velocity component v r is converted into a circumferential component that results in the air-filled part the injection hole is a thin film is built.
  • the remainder of the flow is sprayed as in the case of other valves as an approximately cylindrical main jet 38. Since the mass sprayed off as a thin film 39 atomises much better than the main beam 38, the overall result is an SMD.
  • valve seat body 5 shows a schematic cross section through a valve seat body 5 according to the invention.
  • the valve seat body 5 has an injection hole 7, which enters the valve seat body 5 at its inflow-side end face 34 and exits a spray-side end face 35.
  • the injection hole 7 consists of a first cylindrical portion 40 and a second cylindrical portion 41, which are not arranged coaxially with each other. Rather, the inlet opening 36 or a longitudinal axis of the first cylindrical portion 40 with the inflow-side end face 34 forms an angle ⁇ , which characterizes the inlet angle of the fuel flow into the injection hole 7.
  • the outlet opening 37 or the longitudinal axis of the second cylindrical section 41 forms an angle ⁇ with the spray-side end face 35 of the valve seat body 5.
  • the spray hole inlet or inlet opening 36 consists of a cylinder with the diameter d
  • the spray hole outlet or the outlet opening 37 consists of a cylinder with the diameter D, which is larger than the diameter d.
  • the longitudinal axis of the first cylindrical portion 40 and the longitudinal axis of the second cylindrical portion 41 are inclined at an angle CC to each other.
  • the angle CC controls the ratio of the through the Inlet cylinder or the first cylindrical portion 40 axially directed fluid flow of the velocity v in the outlet cylinder or in the second cylindrical portion 41 in a radial (v r ) and thus peripheral component (v u ) is converted. This is the more the case, the greater the angle CC between the two longitudinal axes.
  • Fig. 3b is a sectional view taken along the line A-A of Fig. 3a.
  • f the more irregular becomes the division of the mass flow on the two lamellae or the film 39.
  • FIGS. 4a and 4b The flow principle according to the invention is illustrated again in FIGS. 4a and 4b.
  • a part of the beam is sprayed at an injection angle equal to the entrance angle ⁇ and the direction of v, respectively, and forms a sub-beam denoted by reference numeral 43 in FIGS. 4a and 4b.
  • This proportion is not used to build up the fins or thin film 39.
  • the velocity component of the Velocity vector v which runs parallel to the longitudinal axis of the second cylindrical section 41 (v ax ), is sprayed off mainly as the main jet or free jet 38 coaxially therewith.
  • the velocity component v r is partially converted into the velocity component v u and serves to build up the lamellae 39 and the thin film 39. After the lamellae leave the injection hole 7 at the discharge-side outlet opening 37 of the second cylindrical portion 41 of the injection hole 7, due to The centrifugal force built up by the peripheral component again generates a radial component which leads to an increased fanning of the beam.

Landscapes

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

Abstract

Soupape d'injection de carburant (1), notamment pour l'injection directe de carburant dans une chambre de combustion (18) d'un moteur à combustion interne, comprenant un pointeau de soupape (3) qui est disposé dans un corps d'injecteur (2) et qui peut être actionné par un actionneur, et comprenant un obturateur de soupape (4) qui est fonctionnellement relié au pointeau de soupape (3) et qui coopère avec une surface (6) de siège de soupape pour ouvrir et fermer la soupape (1), la surface (6) de siège de soupape étant formée sur un corps (5) de siège de soupape et le corps (5) de siège de soupape étant pourvu d'au moins un trou d'injection (7). Les trous d'injection (7) sont constitués d'une première partie cylindrique (40) dotée d'une ouverture (36) d'entrée de carburant et d'une deuxième partie cylindrique (41) disposée en aval de la première partie cylindrique (40) et dotée d'une ouverture (37) de sortie de carburant, la première et la deuxième parties cylindriques (40, 41) ne s'étendant pas coaxialement l'une par rapport à l'autre.
EP07803448A 2006-10-31 2007-09-13 Soupape d'injection de carburant Not-in-force EP2087228B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006051327A DE102006051327A1 (de) 2006-10-31 2006-10-31 Brennstoffeinspritzventil
PCT/EP2007/059611 WO2008052840A1 (fr) 2006-10-31 2007-09-13 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2087228A1 true EP2087228A1 (fr) 2009-08-12
EP2087228B1 EP2087228B1 (fr) 2012-07-18

Family

ID=38670994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803448A Not-in-force EP2087228B1 (fr) 2006-10-31 2007-09-13 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US8313048B2 (fr)
EP (1) EP2087228B1 (fr)
JP (1) JP2010508468A (fr)
DE (1) DE102006051327A1 (fr)
WO (1) WO2008052840A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2707592A4 (fr) * 2011-05-13 2015-06-17 Andrew E Meyer Injecteur de carburant

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7942349B1 (en) 2009-03-24 2011-05-17 Meyer Andrew E Fuel injector
JP5185973B2 (ja) * 2010-04-16 2013-04-17 三菱電機株式会社 燃料噴射弁
FR2968720B1 (fr) * 2010-12-09 2015-08-07 Continental Automotive France Injecteur, notamment pour l'injection multipoints de carburant dans un moteur a combustion interne
US9151260B2 (en) 2011-08-22 2015-10-06 Toyota Jidosha Kabushiki Kaisha Fuel injection valve
DE102011084704A1 (de) 2011-10-18 2013-04-18 Robert Bosch Gmbh Ausrichtelement für ein Einspritzventil sowie Verfahren zur Herstellung eines Einspritzventils
DE102012221713A1 (de) * 2012-11-28 2014-05-28 Robert Bosch Gmbh Einspritzventil
JP5987754B2 (ja) * 2013-04-01 2016-09-07 トヨタ自動車株式会社 燃料噴射弁
JP6044425B2 (ja) * 2013-04-02 2016-12-14 トヨタ自動車株式会社 燃料噴射弁
JP6080087B2 (ja) 2014-02-28 2017-02-15 株式会社デンソー 燃料噴射弁
JP7439399B2 (ja) 2019-06-20 2024-02-28 株式会社デンソー 燃料噴射弁

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JPH025753A (ja) * 1988-06-23 1990-01-10 Aisan Ind Co Ltd 燃料噴射弁とそのノズル
US5449121A (en) * 1993-02-26 1995-09-12 Caterpillar Inc. Thin-walled valve-closed-orifice spray tip for fuel injection nozzle
JP3323429B2 (ja) * 1997-11-19 2002-09-09 トヨタ自動車株式会社 内燃機関用燃料噴射弁
DE19815789A1 (de) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10049033B4 (de) * 2000-10-04 2005-08-04 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10118163B4 (de) 2001-04-11 2007-04-19 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4088493B2 (ja) * 2002-02-07 2008-05-21 株式会社日立製作所 燃料噴射弁
JP2004100536A (ja) * 2002-09-09 2004-04-02 Hitachi Ltd 電磁式燃料噴射弁
DE10341365A1 (de) * 2002-09-09 2004-05-06 Hitachi, Ltd. Kraftstoffeinspritzventil und damit ausgerüstete Brennkraftmaschine des Zylindereinspritzungstyps
JP3977728B2 (ja) * 2002-11-18 2007-09-19 三菱電機株式会社 燃料噴射弁
JP4134966B2 (ja) * 2004-08-17 2008-08-20 株式会社デンソー 噴孔部材、燃料噴射弁、および噴孔部材の製造方法
DE102005036951A1 (de) * 2005-08-05 2007-02-08 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zur Ausformung von Abspritzöffnungen

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See references of WO2008052840A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2707592A4 (fr) * 2011-05-13 2015-06-17 Andrew E Meyer Injecteur de carburant

Also Published As

Publication number Publication date
US20100282872A1 (en) 2010-11-11
US8313048B2 (en) 2012-11-20
EP2087228B1 (fr) 2012-07-18
DE102006051327A1 (de) 2008-05-08
JP2010508468A (ja) 2010-03-18
WO2008052840A1 (fr) 2008-05-08

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