EP1313944A1 - Systeme d'injection de carburant pour moteurs a combustion interne - Google Patents

Systeme d'injection de carburant pour moteurs a combustion interne

Info

Publication number
EP1313944A1
EP1313944A1 EP01956392A EP01956392A EP1313944A1 EP 1313944 A1 EP1313944 A1 EP 1313944A1 EP 01956392 A EP01956392 A EP 01956392A EP 01956392 A EP01956392 A EP 01956392A EP 1313944 A1 EP1313944 A1 EP 1313944A1
Authority
EP
European Patent Office
Prior art keywords
armature
valve
fuel injection
injection device
pressure
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Withdrawn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
EP01956392A
Other languages
German (de)
English (en)
Inventor
Achim Brenk
Wolfgang Klenk
Uwe Gordon
Manfred Mack
Marcus Parche
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 EP1313944A1 publication Critical patent/EP1313944A1/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Withdrawn legal-status Critical Current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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means

Definitions

  • the invention is based on a fuel injection device according to the preamble of claim 1.
  • a fuel injection device known from DE 195 17 578 AI
  • two control valves are by means of one actuate common electromagnet, in whose magnetic circuit the two armatures of the control valves are immersed from opposite sides.
  • the electromagnet By energizing the electromagnet, the two armatures are drawn further into the electromagnet against the action of a closing spring arranged therebetween, and the two control valves are thus opened synchronously.
  • one control valve can be used to control the fuel injection (ie to measure the fuel) and the other control valve can be used to control the injection cross section.
  • this system offers the control options in solenoid valve technology with only one electromagnet.
  • the timing of the injection and the switching between two different injection cross-sections can be implemented freely in the engine's map.
  • Fig. 1 shows a first embodiment of a fuel injection device with an injection valve, the two schematically illustrated control valves for controlling the fuel injection and
  • FIG. 2 shows the two control valves of FIG. 1 in a detailed partial view, the two control valves being actuatable via a common magnetic drive; 3 shows a modification of the second control valve in a representation analogous to FIG. 2; and
  • Fig. 4 shows a second embodiment of a Krausssu-of- fine spraying device analogous to the representation in
  • the first exemplary embodiment of a fuel injection device for internal combustion engines shown in FIG. 1 has an injection valve 1 with a nozzle body 2, which is clamped to a nozzle holder 6 together with a sleeve 3 and an intermediate washer 4 by means of a union nut 5.
  • a piston-shaped valve body 8 in the form of a nozzle needle is displaceably mounted in an axial guide bore 7 of the nozzle body 2, the valve sealing surface 9 of which is pressed against a conical valve seat surface 11 by a closing spring 10 arranged in the nozzle holder 6.
  • a pressure line 12 runs in the injection valve 8 opens into an annular pressure chamber 13 in the nozzle body 2.
  • the valve body 8 has a pressure shoulder 14 in the region of the pressure chamber 13, on which the fuel supplied via the pressure line 12 acts on the valve body 8 in the opening direction.
  • the pressure line 12 is connected via a first control valve 15 designed as a 3/2-way valve either to a relief line (leak oil) 16 or to a high pressure accumulator (common rail) 17 for the fuel. bar .
  • an annular gap leads (not shown) between the nozzle holder 6 facing away from the head portion 18 of the valve body 8 and the bore wall of the Düsenk ⁇ rpers 2 'which is formed by an opening provided at the head portion 18 annular groove for an annular space 19th
  • the head section 18 is guided in a blind bore 20, the bottom space 21 of which is connected to the annular space 19 via transverse and longitudinal bores 22, 23 provided in the head section 18.
  • the head section 18 closes two outgoing from the blind bore 20 and in the combustion chamber of the internal combustion engine to be supplied injection channels 24a, 24b.
  • the valve body 8 On the side facing away from the head section 18, the valve body 8 has an annular shoulder 25 at the transition to a shaft 26, which extends through a bore in the washer 4 into a spring chamber 27. There, the shaft 26 has a spring plate 28, on which the closing spring 10, which is supported at the other end in the spring chamber 27, engages.
  • the stroke carried out by the valve body 8 during opening is controlled by a limiting device in the form of a low-pressure stroke stop (not shown), which is provided in the interior 29 of the sleeve 3 and interacts, for example, with a further plate 30 of the shaft 26.
  • the interior 29 can be connected to the relief line 16 via lines 31, 32, 33 and via a second control valve 34 designed as a 2/2 way valve.
  • the second control valve 34 When the second control valve 34 is closed, the low-pressure stroke causes Beat that the fuel located in the interior 29 is compressed when the valve body 8 is opened.
  • the opening stroke of the valve body 8 is hydraulically limited so that only the lower injection channel 24a is released from the head section 18 for an injection.
  • FIG. 2 shows an enlarged sectional view of the internal structure of the two control valves 15, 34, which have a common magnetic drive in the form of a magnetic coil 40.
  • a plate-shaped first armature 41 which is connected to the valve body (not shown) of the first control valve 15, cooperates with the magnet coil 40 and is guided axially displaceably in a first armature space 42 of the nozzle holder 6 and by a first closing spring 44 supported on a separating element 43 is biased into its valve position (FIG. 1) releasing the connection of the pressure line 12 and the relief line 16.
  • a plate-shaped second armature 45 interacts with the magnet coil 40, which is axially displaceably guided in a second armature space 46 of the nozzle holder 6 and at the same time forms the valve body of the second control valve 34.
  • the second anchor 45 engages with a shoulder 47 in a bore 48 in the nozzle holder 6 and has at the transition to the neck 47 a valve sealing surface 49 which interacts with a conical valve seat surface 50 on the bore 48.
  • the inlet line 32 of the second control valve 34 opens into the bore 48 in the region of a chamber 51 formed on the extension 47.
  • the second armature 45 is connected to the separating element 43 by the second closing spring 52, and the connection between the inlet line 32 and the opening of the second armature biased valve position blocking the second armature space 46 leading away from the outlet line 33.
  • Connection channels 53 are provided in the second anchor 45 so that the second anchor 45 is force-balanced.
  • the armature spaces 42, 46 and thus the two control valves 15, 34 are separated from one another by the separating element 43.
  • the two closing springs 44, 52 are designed such that only the first armature 41 is attracted in a first current stage of the magnet coil 40 and both armatures 41, 45 are attracted in a second higher current stage.
  • the two anchors 41, 45 are tightened in opposite directions, but in other embodiments the two anchors can also be tightened in the same direction.
  • the two anchors 41, 45 can be designed as flat anchors or as immersion anchors.
  • the fuel injection device shown in FIGS. 1 and 2 operates in the following way.
  • Solenoid coil 40 with the first or second current stage the first armature 41 is attracted and thereby the first control valve 15 is actuated, so that the pressure line 12 is connected to the high-pressure accumulator 17 and the fuel is injected.
  • the second armature 45 is not attracted, ie the second control valve 34 remains closed. This means that inside space 29 and also in the chamber 51 to a pressure increase and thus to a stroke limitation, so that the injection takes place with the smaller injection cross section.
  • the second armature 45 is also attracted at the same time, ie the second control valve 34 is opened. -The fuel displaced during the opening stroke of the valve body 8 can via the.
  • Control of the injection cross-section is used, this control can be used with hydraulic stroke stops or a switch between different valve bodies (nozzle needles) in tandem or coaxial injectors.
  • valve sealing surface 54 of the second armature 55 is provided on its underside facing the first armature 41, and away from a conical valve seat surface 57 on a bore 58 through the second closing spring 56 biased in the separator 59.
  • the bore 58 is connected to the bore 62, from which the outlet line 33 extends, through a central through bore 61 which also passes through the extension 60.
  • the sealing seat between valve sealing surface 54 and valve seat surface 57 blocks the connection between the Bore 58 and the second armature chamber 63, into which the inlet line 32 opens.
  • Connection channels 64 are provided in the second armature 55, so that the second armature 55 is force-balanced when the sealing seat is open.
  • the two anchors 41, 55 can be designed as flat anchors or as immersion anchors.
  • Pressure line 12 is connected to the high pressure accumulator 17 and the fuel injection takes place.
  • the second armature 55 is not attracted, i.e. the second control valve 34 remains open.
  • the fuel displaced during the opening stroke of the valve body 8 can flow out into the relief line 16 via lines 31, 32, the second armature space 63, bore 58, through bore 61, bore 62 and line 33.
  • the second armature 55 is simultaneously attracted, i.e. the second control valve 34 is closed. This leads to an increase in pressure in the interior 29 and thus. to a stroke limitation, so that the injection takes place with the smaller injection cross section.
  • FIGS. 2 or 3 show a second exemplary embodiment of a fuel injection device with a modified injection valve 70, in which the line 71 opening into the interior 29 can be connected to the pressure line 12 via the lines 32, 33 and via the second control valve 34. From the interior 29, a line 72 opens into the discharge line 16.
  • the two control valves 15, 34 are as in FIGS. 2 or 3 shown.
  • a pressure stroke stop (not shown) is provided, which in the case of a ' prevailing in the interior 29
  • the power caffeine injector shown in Fig. 4 operates in the following manner.
  • the pressure line 12 is connected to the high-pressure accumulator 17, so that the fuel is injected.
  • the second control valve 34 is closed (ie in the first current stage of the magnetic coil 40)
  • the lines 33, 71 are not connected to the line 32 connected to the pressure line 12 and therefore the interior 29 is not subjected to high pressure.
  • the fuel displaced from the interior 29 during the opening stroke of the valve body 8 flows out via the line 72 to the relief line 16, so that there is no pressure increase in the interior 29 and therefore no stroke limitation.
  • the second control valve 34 is open (ie in the second current stage of the solenoid 40)
  • the lines are open (ie in the second current stage of the solenoid 40)
  • valve body 8 connected via line 32 to pressure line 12 and thus the interior 29 is subjected to high pressure, so that the opening stroke of valve body 8 is limited by the stroke stop provided in interior 29 (not shown).
  • injection valves 1, 70 have so-called “I-nozzles”, in which the opening stroke of the valve closing body 8 takes place in the direction into the nozzle body 2.
  • the invention is not in this type of nozzle limited. In other embodiments, not shown, the invention is provided for so-called “A nozzles”, in which the opening stroke of the valve closing body 8 takes place in the direction out of the nozzle body 2.
  • valve bodies of which each have a magnetically attractable armature 41/45, and with a common magnet coil 40 for the two armatures 41, 45 the common magnet coil is in a first current stage 40 only one armature 41 and in a higher second current stage both armatures 41, 45 can each be tightened against the action of a closing force. In this way, two valve functions can be switched with only one magnetic actuator via two excitation currents of different sizes.

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 un système d'injection de carburant pour moteurs à combustion interne. Ce système comprend deux soupapes de commande (15, 34) destinées à commander le processus d'injection, les corps de ces soupapes présentant chacun un induit (41, 45) à excitation magnétique, ainsi qu'une bobine d'électro-aimant (40) commune aux deux induits (41, 45). En présence d'un premier niveau de courant dans la bobine d'électro-aimant (40) commune, il est possible d'exciter un seul induit (41) à l'encontre de l'action d'une force de fermeture et en présence d'un deuxième niveau de courant plus élevé, les deux induits (41, 45) peuvent être excités. Ainsi, avec une seule bobine d'électro-aimant, deux fonctions de soupape peuvent être assurées grâce à deux courants d'excitation de niveau différent.
EP01956392A 2000-08-22 2001-07-27 Systeme d'injection de carburant pour moteurs a combustion interne Withdrawn EP1313944A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10041024 2000-08-22
DE10041024A DE10041024A1 (de) 2000-08-22 2000-08-22 Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
PCT/DE2001/002846 WO2002016760A1 (fr) 2000-08-22 2001-07-27 Systeme d'injection de carburant pour moteurs a combustion interne

Publications (1)

Publication Number Publication Date
EP1313944A1 true EP1313944A1 (fr) 2003-05-28

Family

ID=7653278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01956392A Withdrawn EP1313944A1 (fr) 2000-08-22 2001-07-27 Systeme d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US20030019959A1 (fr)
EP (1) EP1313944A1 (fr)
JP (1) JP2004507647A (fr)
DE (1) DE10041024A1 (fr)
WO (1) WO2002016760A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7278593B2 (en) * 2002-09-25 2007-10-09 Caterpillar Inc. Common rail fuel injector
JP4475250B2 (ja) * 2005-06-06 2010-06-09 株式会社デンソー 燃料噴射弁およびその製造方法
EP2444651B1 (fr) * 2010-10-19 2013-07-10 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2896813B1 (fr) 2014-01-17 2018-01-10 Continental Automotive GmbH Soupape d'injection de carburant pour moteurs à combustion interne
CN108097539A (zh) * 2018-02-06 2018-06-01 苏州市睿成达电子有限公司 一种改善型喷射点胶阀

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3501708A1 (de) * 1985-01-19 1986-07-24 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Elektromagnetisch betaetigbares mehrwegeventil
ES2002815A6 (es) * 1985-10-07 1988-10-01 Orbital Eng Pty Metodo de controlar el regimen de alimentacion de combustible a motores de combustion interna, particularmente para embarcaciones o automoviles.
JP2708529B2 (ja) * 1988-02-25 1998-02-04 オービタル、エンジン、カンパニー、プロプライエタリ、リミテッド 燃料噴射制御方法および装置
US5353991A (en) * 1989-06-21 1994-10-11 General Motors Corporation Solenoid actuated valve assembly
DE4030890A1 (de) * 1990-09-29 1992-04-02 Bosch Gmbh Robert Kraftstoffeinblaseinrichtung fuer zweitakt-brennkraftmaschinen
GB2289313B (en) * 1994-05-13 1998-09-30 Caterpillar Inc Fluid injector system
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
AUPN391295A0 (en) * 1995-06-30 1995-07-27 Orbital Engine Company (Australia) Proprietary Limited Fuel injection apparatus
AT1343U1 (de) * 1995-12-11 1997-03-25 Avl Verbrennungskraft Messtech Magnetventil
US5947380A (en) * 1997-11-03 1999-09-07 Caterpillar Inc. Fuel injector utilizing flat-seat poppet valves
US6059203A (en) * 1998-09-03 2000-05-09 Caterpillar Inc. Valve assembly with concentrically linked components and fuel injector using same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0216760A1 *

Also Published As

Publication number Publication date
WO2002016760A1 (fr) 2002-02-28
DE10041024A1 (de) 2002-03-14
JP2004507647A (ja) 2004-03-11
US20030019959A1 (en) 2003-01-30

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Inventor name: PARCHE, MARCUS

Inventor name: MACK, MANFRED

Inventor name: GORDON, UWE

Inventor name: BRENK, ACHIM

Inventor name: KLENK, WOLFGANG

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PARCHE, MARCUS

Inventor name: KLENK, WOLFGANG

Inventor name: MACK, MANFRED

Inventor name: GORDON, UWE

Inventor name: BRENK, ACHIM

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