EP1332284A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1332284A1
EP1332284A1 EP01993762A EP01993762A EP1332284A1 EP 1332284 A1 EP1332284 A1 EP 1332284A1 EP 01993762 A EP01993762 A EP 01993762A EP 01993762 A EP01993762 A EP 01993762A EP 1332284 A1 EP1332284 A1 EP 1332284A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
injection valve
spray openings
spray
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
EP01993762A
Other languages
German (de)
English (en)
Other versions
EP1332284B1 (fr
Inventor
Franz Rieger
Thomas Ludwig
Hans Schlembach
Gottlob Haag
Ulrich Brenner
Michael Huebel
Juergen Stein
Udo Sieber
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 EP1332284A1 publication Critical patent/EP1332284A1/fr
Application granted granted Critical
Publication of EP1332284B1 publication Critical patent/EP1332284B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M61/186—Multi-layered 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
    • F02M61/04—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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/7888—With valve member flexing about securement
    • Y10T137/7891—Flap or reed

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injector which can control several spray orifices separately.
  • the fuel injector has two valve needles, which are acted upon by a spring against a respective sealing seat with a prestressing force. If one valve needle is lifted from its sealing seat by a certain forward stroke, it strikes against a stop of the other valve needle and takes this valve needle with it during the further stroke.
  • the two sealing seats of the two valve needles close differently
  • Spray openings that can be aligned at different angles.
  • the structure is multi-part, and two sealing seats have to be manufactured precisely, which results in high costs.
  • Another disadvantage is that only two groups of spray openings can be controlled separately and no further selection of spray openings to be opened is possible.
  • AI is a fuel injector for internal combustion engines with a valve needle and one Auxiliary needle in a bore of the valve needle known.
  • the valve needle on its combustion chamber side, which is designed as a valve closing body, cooperates with a valve seat surface to form a sealing seat which separates spray openings from a fuel inlet.
  • the auxiliary needle guided in the valve needle also has a valve closing body which interacts with a second valve seat surface of the fuel injector.
  • a spring located in the valve needle pulls the auxiliary needle against the valve needle, towards which it likewise forms a sealing seat with a valve seat surface in the valve needle.
  • the auxiliary needle When the hydraulically actuated fuel injection valve begins to open due to an increase in the pressure in the fuel feed line, the auxiliary needle is pressed out of its sealing seat in the valve needle against the sealing seat in the valve body and closes a group of spray openings while another group of spray openings is open. If the pressure continues to rise, the valve needle is lifted from its sealing seat and takes the auxiliary needle with it after a certain stroke, which strikes against a stop of the valve needle. All spray openings are then released.
  • the disadvantage is that a total of three precisely fitting sealing seats are required. With this fuel injection valve according to the prior art, only two groups of spray openings can be controlled separately.
  • a fuel injector with two valve needles is also known from DE 31 20 044 C2, with which spray openings can be opened in two groups.
  • One valve needle is guided inside the other valve needle, which is designed as a hollow needle.
  • This valve needle which is designed as a hollow needle, has spray openings at its end on the combustion chamber side.
  • the disadvantage is that the hollow needle is very expensive to manufacture, since it also has spray openings and thus on one Component two functions that each require precise manufacture of the component are combined.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage over the other hand to offer a cost-effective and technically implementable solution for the control of opening spray openings, since the spray openings do not require a further precise sealing seat to be opened, but the spray openings, which are assigned to a valve section, can then be opened independently if the respective heating element of the valve section is controlled separately from the valve closing body. In this way, a maximum of all spray openings can be selected separately if a valve section is assigned to all spray openings and the respective heating elements can be controlled separately from one another. As soon as the valve closing body opens, only the spray openings not covered by their valve sections spray fuel.
  • the distribution of the fuel in the spray pattern of the fuel injector can be advantageously influenced by the selection of the spray openings.
  • At least the valve section of the disc element may consist of bimetal and the stratification of the bimetal may be such that the valve section releases the spray openings when heated.
  • at least the valve section of the disk element can consist of bimetal and the layering of the bimetal can be carried out such that the valve sections of the disk element cover the spray openings when heated.
  • At least the valve section of the disk element is made of a shape memory alloy, in particular a shape memory alloy that has a two-way effect.
  • the heating elements can advantageously consist of electrical heating wires attached to the valve sections.
  • all valve sections can be selected and opened individually if a separate control line is provided for each of the heating wires.
  • valve seat body or the spray opening plate advantageously has a second bolt circle made of spray openings, located radially on the outside of the first bolt circle, and valve sections of the disk element which are shaped accordingly are assigned to the spray openings of the second bolt circle.
  • the spray openings can advantageously have different spray angles, opening diameters and axial lengths.
  • FIG. 1 shows a section of an embodiment of a fuel injection valve according to the invention with a closed valve needle and covered spray openings in a sectional view
  • FIG. 2 shows the same section as FIG. 1 with released spray openings
  • Fig. 3 shows the section plane III-III in Fig. 1 in supervision
  • FIG. 4 shows detail IV from FIG. 2.
  • FIG. 1 shows a section of a section of a fuel injection valve according to the invention, which faces the combustion chamber (not shown here) of an internal combustion engine.
  • a valve body 1 is, for. B. connected via a weld 3 with a spray opening plate 2, which has spray openings 4, and forms together with this a valve seat body 5.
  • a valve needle 6 has at its end facing the combustion chamber, not shown, a valve closing body 7.
  • the valve closing body 7 acts with a z. B. frustoconical valve seat 8 together to form a sealing seat 9.
  • a disc member 10 is arranged on the spray opening plate 2 and is held on the spray opening plate 2 by the valve body 1.
  • the disk element 10 has radially inwardly projecting valve sections 11 which cover outer spray openings 12 arranged in a bolt circle 19 at normal operating temperature. On the valve sections 11 heating elements 13 are arranged.
  • the valve sections 11 are designed as tongues 17 pointing radially towards the center.
  • the disk element 10 is formed from bimetal, the layering of which is shaped in such a way that the valve sections 11 cover the outer spray openings 12 at a low temperature if the heating elements 13 do not additionally heat the valve
  • Fig. 1 shows the fuel injector in the closed state.
  • the heating elements 13 are not controlled, and the
  • Valve sections 11 of the disk element 10 have the normal operating temperature or a lower one. By designing the bimetal, the valve sections 11 are pressed onto the circularly arranged outer spray openings 12 and close them. If now the valve needle
  • Spray openings 4 determine the spray pattern of the fuel.
  • the valve body 1 is connected via the weld seam 3 to the spray opening plate 2 containing the spray openings 4 and together with this forms a valve seat body 5.
  • the valve needle 6 is formed in one piece with the valve closing body 7.
  • the valve closing body 7 interacts with the valve seat surface 8 formed in the valve body 1 to form a sealing seat 9.
  • the disk element 10 is arranged on the spray opening plate 2 and is on the Spray port plate 2 held by the valve body 1.
  • the valve sections 11 with the associated heating elements 13 are arranged above the outer spray openings 12 forming the second hole circle 19.
  • the fuel injector is shown in the closed state.
  • the heating elements 13 additionally heat the valve sections 11.
  • the valve sections 11 bend away from the associated outer spray openings 12 and expose them. If the valve needle 6 is now lifted out of the sealing seat 9, the fuel can escape from all uncovered spray openings 4, 12.
  • Two valve sections 11 are shown, which open their respective outer spray opening 12.
  • the number of spray openings 12 which can be released separately therefore depends solely on the possibility of controlling the heating elements 13 separately. In the period in which the fuel injection valve is closed, the number of spray openings 12 to be released is advantageously selected by driving the associated heating elements 13.
  • the valve needle 6 then opens the fuel injector just as precisely and quickly as with a fuel injector according to the prior art.
  • FIG. 3 shows the section plane III-III of FIG. 1.
  • the spray openings 4 are arranged.
  • the valve sections 11 cover the outer spray openings 12.
  • the heating elements 13 are arranged on the valve sections 11.
  • the heating elements 13 are z. B. formed as heating wires which are connected via a common connecting wire 14.
  • the heating elements 13 can be actuated together for the outer bolt circle 19 in the present embodiment of the invention.
  • FIG. 4 shows the detail IV of FIG. 2.
  • the spray opening 4 which is an outer spray opening 12, is arranged in the spray opening plate 2.
  • Valve section 11 is heated by the heating element 13 and is therefore lifted off the outer spray opening 12.
  • the edge of valve body 1, which fixes disc element 10 and valve section 11, can still be seen.
  • the valve section 11 made of bimetal has an upper layer 15 with lower thermal expansion and a lower layer 16 with higher thermal expansion.
  • the direction of flow of the fuel when the fuel injector is opened is indicated by arrows.
  • valve section 11 can also be designed in a shape memory alloy, in particular one that shows a so-called two-way behavior. With this, the deformation depends on the temperature increase and is reversible when the temperature decreases.
  • the angle of a fuel injection cone as a whole can be influenced by different design of the angles at which the outer spray openings 12 and the other spray openings 4 are introduced.
  • the embodiment of a fuel injector according to the invention advantageously enables a high switching frequency.
  • the embodiment according to the invention is also inexpensive to implement.

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, notamment une soupape d'injection d'un système d'injection de carburant de moteurs à combustion interne. Cette soupape comprend un pointeau (6), un corps obturateur (7) qui coopère avec une surface siège (8) d'un corps siège de soupape (5) pour former un siège étanche (9). En aval du siège étanche (9), la soupape d'injection a plusieurs orifices de pulvérisation (4, 12) qui sont rendus étanches par le siège étanche (9) par rapport à une arrivée de carburant. Un élément disque (10), placé en aval du siège étanche (9), a au moins une section soupape (11) dont la forme change avec la variation de température. Cette section soupape (11) est raccordée à un élément chauffant (13) et peut recouvrir un orifice de pulvérisation (12).
EP01993762A 2000-11-11 2001-11-12 Soupape d'injection de carburant Expired - Lifetime EP1332284B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10056039 2000-11-11
DE10056039A DE10056039A1 (de) 2000-11-11 2000-11-11 Brennstoffeinspritzventil
PCT/DE2001/004208 WO2002038947A1 (fr) 2000-11-11 2001-11-12 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1332284A1 true EP1332284A1 (fr) 2003-08-06
EP1332284B1 EP1332284B1 (fr) 2004-06-16

Family

ID=7663020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01993762A Expired - Lifetime EP1332284B1 (fr) 2000-11-11 2001-11-12 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6814309B2 (fr)
EP (1) EP1332284B1 (fr)
JP (1) JP2004513296A (fr)
KR (1) KR20020063002A (fr)
DE (2) DE10056039A1 (fr)
WO (1) WO2002038947A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10124745A1 (de) * 2001-05-21 2003-03-27 Bosch Gmbh Robert Brennstoffeinspritzventil
US20040188550A1 (en) * 2003-03-25 2004-09-30 Hitachi Unisia Automotive, Ltd. Fuel injection valve
JP2005090233A (ja) * 2003-09-12 2005-04-07 Hitachi Unisia Automotive Ltd 燃料噴射弁
FR2869573B1 (fr) * 2004-04-30 2006-06-16 Conception Et Dev Michelin Sa Vehicule a carburant gazeux et systeme de purge automatique
GB0421387D0 (en) * 2004-09-25 2004-10-27 Scion Sprays Ltd Pulsed electrostatic atomiser
JP2006152812A (ja) * 2004-11-25 2006-06-15 Denso Corp 燃料噴射弁およびその製造方法
JP2006183657A (ja) * 2004-12-02 2006-07-13 Nissan Motor Co Ltd インジェクタ
DE102006025332A1 (de) * 2006-05-31 2007-12-06 Robert Bosch Gmbh Verfahren und Vorrichtung zur Reinigung von Ventilen
JP2007332804A (ja) * 2006-06-12 2007-12-27 Nissan Motor Co Ltd 内燃機関の燃料噴射システムおよび内燃機関の燃料噴射方法
US7669789B2 (en) * 2007-08-29 2010-03-02 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US9878226B2 (en) * 2014-08-18 2018-01-30 Douglas Nardini Cleaning device
US10639527B2 (en) 2014-08-18 2020-05-05 Douglas Nardini Cleaning device
EP3587791B1 (fr) * 2018-06-21 2021-03-24 Claverham Limited Buse de régulation de débit
KR102614976B1 (ko) 2021-12-30 2023-12-19 주식회사 현대케피코 분무각과 분무유량조절이 가능한 인젝터

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DE3048304A1 (de) 1980-12-20 1982-07-29 Robert Bosch Gmbh, 7000 Stuttgart "kraftstoffeinspritzduese fuer brennkraftmaschinen"
DE3120044A1 (de) 1981-05-20 1982-12-09 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3228079A1 (de) 1982-07-28 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
US5140965A (en) * 1990-04-17 1992-08-25 Hitachi, Ltd. System for and method of supplying fuel to internal combustion engine
US5570841A (en) * 1994-10-07 1996-11-05 Siemens Automotive Corporation Multiple disk swirl atomizer for fuel injector
US5619177A (en) * 1995-01-27 1997-04-08 Mjb Company Shape memory alloy microactuator having an electrostatic force and heating means
JPH1172067A (ja) 1997-06-24 1999-03-16 Toyota Motor Corp 内燃機関の燃料噴射弁
JP3164023B2 (ja) * 1997-06-25 2001-05-08 トヨタ自動車株式会社 内燃機関の燃料噴射弁
US6019113A (en) 1998-10-26 2000-02-01 General Motors Corporation Method and apparatus for controlling a shape memory alloy fuel injector
US6318641B1 (en) * 2000-02-11 2001-11-20 Delphi Technologies, Inc. Shape memory alloy fuel injector small package integral design

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Also Published As

Publication number Publication date
US20030127543A1 (en) 2003-07-10
DE10056039A1 (de) 2002-05-16
DE50102633D1 (de) 2004-07-22
WO2002038947A1 (fr) 2002-05-16
JP2004513296A (ja) 2004-04-30
EP1332284B1 (fr) 2004-06-16
KR20020063002A (ko) 2002-07-31
US6814309B2 (en) 2004-11-09

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