EP0908617A1 - Dispositif d'injection de combustible - Google Patents

Dispositif d'injection de combustible Download PDF

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Publication number
EP0908617A1
EP0908617A1 EP98111577A EP98111577A EP0908617A1 EP 0908617 A1 EP0908617 A1 EP 0908617A1 EP 98111577 A EP98111577 A EP 98111577A EP 98111577 A EP98111577 A EP 98111577A EP 0908617 A1 EP0908617 A1 EP 0908617A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel
closing body
fuel injection
valve 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.)
Granted
Application number
EP98111577A
Other languages
German (de)
English (en)
Other versions
EP0908617B1 (fr
Inventor
Rudolf Heinz
Roger Potschin
Klaus-Peter Schmoll
Friedrich Boecking
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 EP0908617A1 publication Critical patent/EP0908617A1/fr
Application granted granted Critical
Publication of EP0908617B1 publication Critical patent/EP0908617B1/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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators

Definitions

  • the invention is based on a fuel injection device according to the preamble of claim 1.
  • a 3-way valve is used, with whose help the control room either only with the high-pressure fuel source or only with a fuel return tank connected is.
  • the actuation of the valve member this 3-way valve is made using a Electromagnets.
  • This known configuration according to the control of the 3-way valve either that Injector link in fully open or fully open brought closed position.
  • the 3-way valve is included designed so that the valve member in a respective Closing position completely from resulting from pressures Forces should be free.
  • the ring surfaces and the Circular areas are kept the same size.
  • the fuel injection device according to the invention with the characterizing features of claim 1 has the compared to the advantage that the valve member in the respective End position of its closing body on one of the valve seats Ring and / or high pressure from the high pressure fuel source Has circular surfaces of different sizes, such that the closing body by this from the pressure load Resulting forces in a stable end position its respective valve seat is held.
  • difference area resulting from the difference of the areas dimensioned that the resulting forces in the respective End position of the closing body is not greater than about 40% of the forces that can be applied by the actuator.
  • difference area resulting from the difference of the areas dimensioned that the resulting forces in the respective End position of the closing body is not greater than about 40% of the forces that can be applied by the actuator.
  • the second Ring area smaller than the first ring area and the first Circular area smaller than the second circular area.
  • FIG. 1 shows a fuel injection valve the fuel injector in section and Figure 2 the valve member controlling the fuel injector 3-way valve.
  • the invention relates to a fuel injection device, the one high-pressure fuel pump not shown in the figure has, which from a fuel reservoir if necessary with the interposition of a pre-feed pump Receives fuel and via a pressure line, at high Bring pressure, a high-pressure fuel supply 8 supplies. These parts are considered to be high pressure fuel sources describe.
  • the high-pressure fuel reservoir 8 supplies via Fuel lines 15 each have a fuel injection valve 14 with the lowest fuel injection pressure Fuel.
  • These fuel injectors are made by a control unit, not shown, electrically controlled so that, according to operating parameters of the internal combustion engine the opening of the fuel injection valves 14 with Start of fuel injection and fuel injection duration be determined.
  • the fuel injection valve 14 has a housing 19, in which in a longitudinal bore 20 a needle-like injection valve member 21 is performed. At one end is this injection valve member with a conical sealing surface 23 provided on the in the combustion chamber of the internal combustion engine protruding tip 24 of the valve housing with a valve seat cooperates from which injection openings 25 dissipate the inside of the fuel injector, here the injection valve member 21st surrounding, with fuel under injection pressure filled annulus 27, with the combustion chamber of the associated Internal combustion engine connects so as to make an injection complete when the injector member is off its valve seat has lifted off.
  • the annular space 27 is with a pressure space 29 connected, in constant communication with a Pressure line 30 is connected to the fuel line 15 of the respective fuel injector is connected.
  • the one High-pressure fuel accumulator 8 supplied fuel pressure also acts in the pressure chamber 29 and there on a pressure shoulder 31 of the fuel injection valve member 21, via the the fuel injection valve member in a known manner suitable conditions lifted from its valve seat can be.
  • At the other end of the fuel injector member is this in a cylinder bore 33 and closes a control chamber 36 with its end face 34 on.
  • the closed position of the fuel injector member is thereby by the pressure in the control room 36 and by a compression spring 12, which is between a spring plate 10 of the fuel injector member and the housing 19 supports, controls. While the one acting in the closing direction Compression spring 12 unchangeable in its characteristics is, with the help of the pressure in the control room 36 Opening and closing movement of the fuel injection valve member triggered.
  • control room 36 is over a channel 37 with a 3-way valve Valve 40 connected.
  • the canal opens here from the control room 37 into a valve chamber 41, in which a closing body 42 of the valve member 43 of the valve 40 is adjustably arranged is.
  • the valve member 43 has one with the closing body 42 firmly connected plunger 45.
  • the second end face goes into a connecting part 48 to the plunger 45, which is a smaller one Diameter than the rest, in a guide bore 50 guided plunger 45.
  • annular space 51 is formed, into which an inflow channel 53 opens.
  • the annular space 51 forms a flow channel between the inlet channel 53 and the valve chamber 41.
  • a reduced diameter part 52 on which at the mouth of this part of the guide bore 50 in the Valve chamber 41 is a valve seat 54 which is designed as second valve seat together with the second sealing surface 47 works.
  • a first valve seat 55 Coaxial with this and coaxial with the valve member 43 or the closing body 42 is at the opposite end of the Valve chamber 41 formed a first valve seat 55 with which the first sealing surface 46 acts together. From valve seat 55 leads from a drain channel 57 from the valve chamber 41.
  • the first and second sealing surfaces 46 and 47 as well as the first 55 and second valve seat 54 are present Trap conical with a cone tip angle, which is smaller in the first valve seat 55 than the corresponding one Cone tip angle of the first sealing surface 46 and with a cone tip angle of the second valve seat 54 is greater than the cone tip angle of the second sealing surface 47.
  • the actuation of the valve member 43 takes place via the plunger 45 from a not shown Drive 59, which as a piezo arrangement, e.g.
  • Piezostack or as a magnetostrictive element is.
  • These drives have the advantage that they are analogous to Carry out actuation travel with and high actuation force, even if the absolutely producible way is relatively small, so that large travel ranges also large Piezo element packs must be used.
  • the other The advantage of such drives is that they are very fast act so that quick switching operations can be carried out, which is particularly advantageous when it comes to injection technology are.
  • This annular surface is RF2 smaller than the ring area RF1, so that in the closing direction on the valve body 42 to the side of its drive 59 forces resulting from the area difference predominate. These forces keep the closing body 42 in one stable end position on the second valve seat 54. The forces are dimension so that the drive 59 the closing body 42nd Lift off this second valve seat 54 to open it can. If the closing body comes in its other position System on the first valve seat 55, so again arise stable conditions. It can be assumed that the closing body 42 in the opening direction at most a first Circular area KF1 can act from the diameter of the Guide bore 50 results. This circular area is on the side of the plunger 45 facing away from the valve chamber 41 relieved of pressure.
  • a maximum of a second circular area KF2 to be effective from the plant of the first sealing surface 46 on the first valve seat 55 is determined.
  • the first circular area KF1 is smaller than the second circular area KF2, so that a difference surface from the difference of these surfaces results from the high fuel pressure of the high-pressure fuel reservoir 8 is loaded and generates a force that again in the closing direction of the closing body 42 to the first Valve seat 55 acts. This also in the closing direction Acting forces are such that they are 59 of the closing body 42 can be overcome.
  • the respective forces in the stable end positions of the closing body are so large that they are about 40% of those that can be applied by the drive Actuating forces. That is with one required effort for the actuator and one appropriate energy requirements an economical mode of operation of the three-way valve possible. For the rest can this way a drive only for adjusting the Closing body may be required.
  • the closing body in its respective end positions become stable in the closed position held. This does not apply to the duration of being closed any power to actuator 59. This is for safe and cost-saving operation of the valve an essential advantage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP98111577A 1997-10-10 1998-06-24 Dispositif d'injection de combustible Expired - Lifetime EP0908617B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19744723A DE19744723A1 (de) 1997-10-10 1997-10-10 Kraftstoffeinspritzeinrichtung
DE19744723 1997-10-10

Publications (2)

Publication Number Publication Date
EP0908617A1 true EP0908617A1 (fr) 1999-04-14
EP0908617B1 EP0908617B1 (fr) 2006-04-26

Family

ID=7845116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111577A Expired - Lifetime EP0908617B1 (fr) 1997-10-10 1998-06-24 Dispositif d'injection de combustible

Country Status (4)

Country Link
US (1) US5915361A (fr)
EP (1) EP0908617B1 (fr)
JP (1) JPH11193765A (fr)
DE (2) DE19744723A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167745A1 (fr) * 2000-07-01 2002-01-02 Robert Bosch GmbH Procédé pour faire fonctionner un injecteur/ système d'injection

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9713791D0 (en) * 1997-07-01 1997-09-03 Lucas Ind Plc Fuel injector
DE19701879A1 (de) 1997-01-21 1998-07-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19732802A1 (de) * 1997-07-30 1999-02-04 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19742320A1 (de) * 1997-09-25 1999-04-01 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE19752150A1 (de) * 1997-11-25 1999-05-27 Focke & Co Ventil, insbesondere Leimventil
DE19756087A1 (de) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Hochdruckpumpe zur Kraftstoffversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
DE19827267A1 (de) * 1998-06-18 1999-12-23 Bosch Gmbh Robert Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
DE19860678A1 (de) * 1998-12-29 2000-07-06 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19919432C2 (de) * 1999-04-29 2002-07-04 Bosch Gmbh Robert Common Rail Injektor
DE19949528A1 (de) * 1999-10-14 2001-04-19 Bosch Gmbh Robert Doppelschaltendes Steuerventil für einen Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen mit hydraulischer Verstärkung des Aktors
US6196199B1 (en) * 1999-12-28 2001-03-06 Detroit Diesel Corporation Fuel injector assembly having an improved solenoid operated check valve
WO2001071823A2 (fr) 2000-03-22 2001-09-27 Siemens Vdo Automotive Corporation Procede de commande d'un actionneur magnetostrictif a detection autonome
DE10058760C2 (de) * 2000-11-27 2003-05-28 Bosch Gmbh Robert Geteilter Steuerventilkörper für Injektorsteuerventile
US6454238B1 (en) * 2001-06-08 2002-09-24 Hoerbiger Kompressortechnik Services Gmbh Valve
DE10131631A1 (de) * 2001-06-29 2003-01-16 Bosch Gmbh Robert Kraftstoffinjektor mit hochdruckfestigkeitsoptimiertem Steuerraum
US6647966B2 (en) * 2001-09-21 2003-11-18 Caterpillar Inc Common rail fuel injection system and fuel injector for same
DE10155718C2 (de) * 2001-11-13 2003-09-18 Hermann Golle Einspritzsystem für Dieselmotoren
DE10163693A1 (de) * 2001-12-21 2003-07-10 Orange Gmbh Einspritzinjektor für Brennkraftmaschinen
GB0215488D0 (en) * 2002-07-04 2002-08-14 Delphi Tech Inc Fuel injection system
DE10241445A1 (de) * 2002-09-06 2004-03-18 Daimlerchrysler Ag 3/2-Wegeventil zur Steuerung einer Common-Rail-Einspritzdüse
DE102004018927A1 (de) * 2004-04-20 2005-11-17 Robert Bosch Gmbh Common-Rail-Injektor
DE102005060552B4 (de) * 2005-12-17 2009-06-10 Man Diesel Se Einspritzvorrichtung für Brennstoffmotoren
DE102007006939A1 (de) 2007-02-13 2008-08-14 Robert Bosch Gmbh Injektor mit zusätzlichem Servoventil
CN104819083A (zh) * 2015-04-27 2015-08-05 江苏海事职业技术学院 大型低速二冲程柴油机用高压共轨燃油喷射控制系统
US11933257B2 (en) * 2022-03-18 2024-03-19 Caterpillar Inc. Fuel injector lift control

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2041170A (en) * 1979-01-25 1980-09-03 Lucas Industries Ltd Flow control valve
DE4236882C1 (de) * 1992-10-31 1994-04-21 Daimler Benz Ag Kraftstoffeinspritzanlage mit einer Hochdruckpumpe und einer gemeinsamen Versorgungsleitung für alle Einspritzdüsen mit Magnetventilsteuerung
EP0615064A1 (fr) * 1993-03-08 1994-09-14 Ganser-Hydromag Système de commande d'une soupape d'injection d'un moteur à combustion interne
WO1995025888A1 (fr) * 1994-03-24 1995-09-28 Siemens Aktiengesellschaft Soupape d'injection pour moteurs a combustion interne

Family Cites Families (8)

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US4603671A (en) * 1983-08-17 1986-08-05 Nippon Soken, Inc. Fuel injector for an internal combustion engine
JPH0759919B2 (ja) * 1986-04-04 1995-06-28 日本電装株式会社 デイ−ゼルエンジン用燃料噴射制御装置
WO1992012341A1 (fr) * 1991-01-14 1992-07-23 Nippondenso Co., Ltd. Dispositif gicleur de carburant du type a accumulation de pression
JP2885076B2 (ja) * 1994-07-08 1999-04-19 三菱自動車工業株式会社 蓄圧式燃料噴射装置
DE4445586A1 (de) * 1994-12-20 1996-06-27 Bosch Gmbh Robert Verfahren zur Reduzierung des Kraftstoffdruckes in einer Kraftstoffeinspritzeinrichtung
US5671715A (en) * 1995-04-27 1997-09-30 Nipon Soken, Inc. Fuel injection device
US5732679A (en) * 1995-04-27 1998-03-31 Isuzu Motors Limited Accumulator-type fuel injection system
JPH09209867A (ja) * 1996-02-07 1997-08-12 Mitsubishi Motors Corp 燃料噴射装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2041170A (en) * 1979-01-25 1980-09-03 Lucas Industries Ltd Flow control valve
DE4236882C1 (de) * 1992-10-31 1994-04-21 Daimler Benz Ag Kraftstoffeinspritzanlage mit einer Hochdruckpumpe und einer gemeinsamen Versorgungsleitung für alle Einspritzdüsen mit Magnetventilsteuerung
EP0615064A1 (fr) * 1993-03-08 1994-09-14 Ganser-Hydromag Système de commande d'une soupape d'injection d'un moteur à combustion interne
WO1995025888A1 (fr) * 1994-03-24 1995-09-28 Siemens Aktiengesellschaft Soupape d'injection pour moteurs a combustion interne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167745A1 (fr) * 2000-07-01 2002-01-02 Robert Bosch GmbH Procédé pour faire fonctionner un injecteur/ système d'injection

Also Published As

Publication number Publication date
JPH11193765A (ja) 1999-07-21
US5915361A (en) 1999-06-29
DE19744723A1 (de) 1999-04-15
EP0908617B1 (fr) 2006-04-26
DE59813510D1 (de) 2006-06-01

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