EP1303695A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1303695A1
EP1303695A1 EP01953880A EP01953880A EP1303695A1 EP 1303695 A1 EP1303695 A1 EP 1303695A1 EP 01953880 A EP01953880 A EP 01953880A EP 01953880 A EP01953880 A EP 01953880A EP 1303695 A1 EP1303695 A1 EP 1303695A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
fuel
needle
sealing seat
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.)
Withdrawn
Application number
EP01953880A
Other languages
German (de)
English (en)
Inventor
Guenter Dantes
Detlef Nowak
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 EP1303695A1 publication Critical patent/EP1303695A1/fr
Withdrawn legal-status Critical Current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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
    • 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 injector according to the preamble of the main claim.
  • a fuel injection valve which has a valve needle which is actuated by an actuator.
  • the actuator consists, for. B. from an electromagnetic coil or a piezo element.
  • An exemplary generic fuel injector is described in DE 35 40 660 C2. It is an electromagnetically actuated fuel injector.
  • the fuel injector has a valve housing in which a magnet coil is arranged on a coil carrier.
  • the valve needle interacts with a valve seat surface to form a sealing seat.
  • the valve needle is firmly connected to an armature. The armature and valve needle are pressed against the sealing seat by a return spring.
  • a disadvantage of this known fuel injector is that the distribution and the amount of fuel can be regulated only to a very limited extent. The direction in which the fuel emerges from the fuel injection valve is thus determined by the direction of the spray hole. Adaptation to various operating states, as is necessary in particular with lean mix concepts and stratified charging processes in combination with direct injection into the combustion chamber, is very difficult or impossible. For this purpose it is necessary to achieve different injection angles in the direction under different operating states.
  • a fuel injection valve for internal combustion engines which has two hole circles consisting of spray bores at its end on the combustion chamber side.
  • the fuel injector has two coaxial valve needles in a nozzle body for separately controlling the two hole circles.
  • a separating sleeve is also coaxially arranged between the two valve needles, the end face of which cooperates with a valve seat surface common to the valve seat surfaces of the two valve needles.
  • the two hole circles are each supplied with fuel along the valve needles by their own fuel feed, with a separate fuel injection pump being provided on each of the two fuel feeds.
  • valve needles are each acted upon by a spring in the closing direction and each cooperate with a valve seat surface to form a sealing seat. Different spray openings are released by the two valve needles. • The valve needles are controlled purely hydraulically, the opening sequence being determined by the different spring force of the two closing springs of the two valve needles. An adaptation to a map of an internal combustion engine, as is typically very well possible with an actuator-controlled fuel injector, cannot therefore take place.
  • the fuel injector according to the invention with the characterizing features of claim 1 has the advantage of enabling a distribution of the fuel in the combustion chamber that is adapted to the requirements of the map and in particular a lean mix concept .
  • the angle at which the fuel is distributed in the spray pattern of the fuel injector can be changed.
  • this is possible due to the construction with two valve needles, each of which is actuated by its own actuator.
  • the fuel injection valve can be well adapted to a map of the internal combustion engine by actuation via one actuator each.
  • the two sealing seats of the two valve needles can advantageously be used to actuate two different bolt circles, consisting of injection bores.
  • the spray bores of the different bolt circles can in particular have different spray angles and be offset from one another.
  • only one valve needle can advantageously be actuated, so that a first hole circle is opened.
  • This z. B. a narrow spray angle of the spray bores, so that a fuel injection jet consisting of the fuel jets of the individual spray bores is formed, which has an overall narrow angular range.
  • FIG. 1 shows a section through a 'generic
  • Fuel injection valve which has a valve needle actuated by an actuator
  • Fig. 2 shows a section of a first exemplary embodiment of a fuel injection valve according to the invention in a sectional illustration
  • Fig. 3 shows a detail from a second exemplary embodiment of an inventive one
  • Fuel injector in a sectional view.
  • FIGS. 2 and 3 Before two exemplary embodiments of a fuel injector according to the invention are described in more detail with reference to FIGS. 2 and 3, for the better. Understanding of the invention will first be briefly explained with reference to FIG. 1, an already known fuel injector with respect to its essential components for a fuel injector with an actuator.
  • the fuel injection valve 1 is designed in the form of a fuel injection valve for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is guided.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface .6 arranged on a valve seat body 5 to form a sealing seat.
  • fuel injector 1 is an inward opening fuel injector 1, which has a Spray opening 7 has.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a solenoid 10, which acts here as an actuator.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheathing 18, which can be molded on the inner pole 13 ' .
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disk 15 is used for stroke adjustment.
  • An armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected via a flange 21 to the valve needle 3, which is connected to the flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
  • Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and on the valve body 5, which channels the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the spray opening 7.
  • the fuel injector 1 is sealed by a seal 28 against a cylinder head or a fuel distributor, not shown.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6.
  • the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, with the stroke passing through a working gap 27 located in the rest position between the inner pole 12 and the armature 20 is predetermined.
  • the armature 20 receives the flange 21, which with the valve needle '3 is welded, in the lift direction as well.
  • the valve closing body 4, which is operatively connected to the valve needle 3, lifts off the valve seat surface and fuel is dispensed via the spray opening 7.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the flange 21 which is operatively connected to the valve needle 3 moves counter to the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, as a result of which the valve-closure member 4 is seated on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • FIG. 2 the combustion-roughened section of a fuel injector 31 according to the invention is shown with the lower section of a valve body 32.
  • a valve seat body 33 is connected to the valve body 32 via an annular circumferential weld seam 34.
  • a first valve needle 35 which in the embodiment shown here is integrally connected to a valve closing body 36 and has a hollow cylindrical design, cooperates with a valve seat surface 37 to form an outer sealing seat 38.
  • a second solid valve needle 39 which is also formed in one piece as a valve closing body 40 in its section facing the combustion chamber, interacts with a second valve seat surface 41, which in turn is formed in the valve seat body 33, to form a second inner sealing seat 42.
  • the second valve needle 39 is arranged in an inner longitudinal opening 64 of the first valve needle 35.
  • the valve seat body 33 has an inner guide opening 65, in which the first valve needle 35 is guided with its valve closing body 36. Subsequent to a fuel chamber 43, from the central axis 45 outside the first Valve needle 35 with its valve closing body 36 is a 'fuel inlet 44, here indicated by an arrow, to the first sealing seat 38.
  • This fuel inlet 44 is set up, for example, by providing flats on the outer circumference of the valve closing body 36 so that the fuel in the guide opening 65 can flow downstream.
  • a first outer bolt circle 46 made of injection bores is arranged in the valve seat body 33. Likewise, a second inner bolt circle 47 consisting of injection bores is arranged in the valve seat body 33.
  • the spray bores of the first bolt circle 46 have a smaller angle to the center axis 45 than the spray bores of the second bolt circle 47.
  • the spray bores of the two bolt circles 46, 47 can be offset by a circumferential angle in the illustration chosen here be such that the fuel jet of a spray hole injects into the space between two spray holes of the other " hole circle.
  • the first bolt circle 46 is arranged with respect to the central axis 45 within the first sealing seat 38.
  • the second bolt circle 47 is arranged within the second sealing seat 42 with respect to the central axis 45. If both valve needles 35, 39 rest with their valve closing bodies 36, 40 on their respective sealing seats 38, 42, then the hole circles 46, 47 are sealed off from the fuel inlet 44. If the first valve needle 35 is raised with its valve closing body 36 out of its first sealing seat 38, a connection from the fuel inlet 44 to the first bolt circle 46 is released.
  • the Abspritzbohronne of the first hole circle 46 have a smaller angle • in respect to the central axis 45th This creates a narrow fuel injection jet that spreads at a narrow angle in the combustion chamber.
  • the second hole circle 47 is separated from the fuel inlet 44 by the second valve needle 39 with the second valve closing body 40, which is still in contact with the second sealing seat 42. If a further expanding fine spray jet fuel is desired, the second valve needle 39 with its valve closing body 40 can be lifted out of its second sealing seat 42 by a second actuator (not shown here). Thus, a connection from the fuel inlet 44 and finally from the fuel chamber 43 is also released to the second hole circle 47.
  • the fuel injection jet is now supplemented by the fuel which is injected through the injection bores of the second hole circle 47 at an angle greater than the central axis 45, which leads to an expansion of the fuel injection jet.
  • FIG. 3 shows an alternative embodiment according to the invention in a sectional illustration of the section of the fuel injection valve 48 facing the combustion chamber.
  • a valve seat body 50 is arranged in a valve body 49 and connected to it by means of a weld seam 51.
  • the weld 51 runs z. B. circularly around a central axis 61.
  • a first hollow cylindrical valve needle 52 which is designed in one piece as a valve closing body 53 in its section facing the combustion chamber, interacts with a first valve seat surface 54, which is arranged in the valve seat body 50, to form a first inner sealing seat 55.
  • a second, also hollow cylindrical valve needle 56 which is designed in one piece as a valve closing body 57 in its section facing the combustion chamber, cooperates with a second valve seat surface 58 of the valve seat body 50 to form a second outer sealing seat 59.
  • the second valve needle 56 has an inner longitudinal opening 66, in which the first valve needle 52 is arranged.
  • Fuel supply line 60 which is designed as an inner bore of the first valve needle 52, to the first inner sealing seat 55.
  • the inflow of fuel is represented by arrows in the fuel supply line 60.
  • a first inner bolt circle 62 consisting of injection bores, is arranged from the central axis 61 outside the first sealing seat 55 in the valve seat body 50.
  • a second outer bolt circle 63 consisting of injection bores is arranged from the central axis 61 outside the second sealing seat 59.
  • the first sealing seat 55 seals the first hole circle 62 with respect to the fuel supply 60, and the first sealing seat 55 and the second sealing seat 59 seal the second hole circle 63 with their spray bores against the fuel supply 60.
  • the designations of the two bolt circles as first bolt circle 62 and as second bolt circle 63 are also interchanged with the corresponding bolt circles of FIG. 2.
  • the first hole circle 62 is correspondingly connected to the fuel supply 60 when the first valve needle 52 is raised with its valve closing body 53 out of the first sealing seat 55.
  • a fuel injection jet is emitted into the combustion chamber, not shown.
  • the fuel injection jet is designed. If a different design of the fuel injection jet is now required in accordance with a specific operating point in the characteristic diagram of the internal combustion engine, the second valve needle 56, which can be controlled completely independently by a separate actuator (not shown here), can also be raised with its valve closing body 57 from the second sealing seat 59 are and thus the fuel supply 60 to the second bolt circle 63 are released.

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

L'invention concerne une soupape d'injection de carburant (31, 48), notamment une soupape d'injection de systèmes d'injection de carburant de moteurs à combustion. Cette soupape présente un premier actionneur qui coopère avec un premier pointeau (35, 52). Un premier corps obturateur (36, 53), placé sur le premier pointeau (35, 52), coopère avec une première surface siège (37, 54) pour former un siège d'étanchéité (38, 55). Un deuxième actionneur coopère avec un deuxième pointeau (39, 56). Un deuxième corps obturateur (40, 57), placé sur le deuxième pointeau (39, 56), coopère avec une deuxième surface siège (41, 58) pour former une deuxième surface siège (42, 59).
EP01953880A 2000-07-15 2001-07-13 Soupape d'injection de carburant Withdrawn EP1303695A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10034446A DE10034446A1 (de) 2000-07-15 2000-07-15 Brennstoffeinspritzventil
DE10034446 2000-07-15
PCT/DE2001/002540 WO2002006663A1 (fr) 2000-07-15 2001-07-13 Soupape d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1303695A1 true EP1303695A1 (fr) 2003-04-23

Family

ID=7649035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01953880A Withdrawn EP1303695A1 (fr) 2000-07-15 2001-07-13 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6698674B2 (fr)
EP (1) EP1303695A1 (fr)
JP (1) JP2004504531A (fr)
KR (1) KR20020029409A (fr)
DE (1) DE10034446A1 (fr)
WO (1) WO2002006663A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6945475B2 (en) * 2002-12-05 2005-09-20 Caterpillar Inc Dual mode fuel injection system and fuel injector for same
WO2005008059A1 (fr) * 2003-07-17 2005-01-27 Ganser-Hydromag Ag Soupape d'injection de carburant pour moteurs a combustion interne
EP1555430B1 (fr) * 2004-01-13 2007-01-03 Delphi Technologies, Inc. Buse d'injection
ITBO20040560A1 (it) * 2004-09-10 2004-12-10 Magneti Marelli Powertrain Spa Iniettore di carburante con valvola di iniezione provvista di alimentazione laterale
ATE461363T1 (de) * 2006-07-27 2010-04-15 Magneti Marelli Spa Kraftstoffeinspritzventil für eine direkteinspritzende brennkraftmaschine
US8596561B2 (en) * 2011-08-31 2013-12-03 Caterpillar Inc. Dual fuel injector with hydraulic lock seal
US8789513B2 (en) * 2011-09-26 2014-07-29 Hitachi, Ltd Fuel delivery system
EP2880299A1 (fr) 2012-08-01 2015-06-10 3M Innovative Properties Company Injecteurs de carburant avec un coefficient de décharge de carburant amélioré
KR20150032913A (ko) * 2012-08-01 2015-03-30 쓰리엠 이노베이티브 프로퍼티즈 컴파니 비-코이닝된 3차원 노즐 입구 면을 가진 연료 분사기
JP6338662B2 (ja) * 2014-06-10 2018-06-06 日立オートモティブシステムズ株式会社 燃料噴射弁
WO2016121475A1 (fr) * 2015-01-30 2016-08-04 日立オートモティブシステムズ株式会社 Robinet d'injection de carburant
WO2019206897A1 (fr) * 2018-04-25 2019-10-31 Robert Bosch Gmbh Ensemble siège de soupape d'injecteur de carburant comprenant une pièce rapportée qui forme un siège de soupape

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DE2710216A1 (de) * 1977-03-09 1978-09-14 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE2710138A1 (de) * 1977-03-09 1978-09-14 Maschf Augsburg Nuernberg Ag Mehrloch-einspritzduese
DE2711391A1 (de) 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE2711390A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE3036583A1 (de) * 1980-09-27 1982-05-13 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzduese
DE3344229A1 (de) 1983-12-07 1985-06-20 Pierburg Gmbh & Co Kg, 4040 Neuss Elektromagnetisches brennstoffeinspritzventil
DE3540660A1 (de) 1985-11-16 1987-05-21 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
JP2537263B2 (ja) 1988-04-12 1996-09-25 本田技研工業株式会社 燃料噴射式エンジンの吸気装置
DD287009A5 (de) 1989-08-01 1991-02-14 Veb Polygraph Buchbindereimaschinenwerke,De Einrichtung zur bildung stehender falzbogenstapel
DE4023223A1 (de) 1990-07-21 1992-01-23 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
FR2722538B1 (fr) 1994-07-12 1996-09-20 Magneti Marelli France Injecteur de carburant "bi-jet" a noyaux et entrefers en parallele pour moteur a combustion interne alimente par injection
US5899389A (en) 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly
GB9916464D0 (en) * 1999-07-14 1999-09-15 Lucas Ind Plc Fuel injector

Non-Patent Citations (1)

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Title
See references of WO0206663A1 *

Also Published As

Publication number Publication date
KR20020029409A (ko) 2002-04-18
US6698674B2 (en) 2004-03-02
JP2004504531A (ja) 2004-02-12
US20020179748A1 (en) 2002-12-05
DE10034446A1 (de) 2002-01-24
WO2002006663A1 (fr) 2002-01-24

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