EP0840848B1 - Soupape d'injection de carburant pour injection sous haute pression - Google Patents

Soupape d'injection de carburant pour injection sous haute pression Download PDF

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Publication number
EP0840848B1
EP0840848B1 EP96946069A EP96946069A EP0840848B1 EP 0840848 B1 EP0840848 B1 EP 0840848B1 EP 96946069 A EP96946069 A EP 96946069A EP 96946069 A EP96946069 A EP 96946069A EP 0840848 B1 EP0840848 B1 EP 0840848B1
Authority
EP
European Patent Office
Prior art keywords
housing
fuel injection
injection valve
solenoid valve
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.)
Expired - Lifetime
Application number
EP96946069A
Other languages
German (de)
English (en)
Other versions
EP0840848A1 (fr
Inventor
Bernhard Bronkal
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 EP0840848A1 publication Critical patent/EP0840848A1/fr
Application granted granted Critical
Publication of EP0840848B1 publication Critical patent/EP0840848B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • 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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • 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
    • 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
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating 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
    • 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
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/077—Injectors having cooling or heating means

Definitions

  • the invention is based on a fuel injection valve for high pressure injections according to the preamble of the patent claim 1.
  • a fuel injection valve for high pressure injections according to the preamble of the patent claim 1.
  • Such a known from US Patent 4,972,997 Fuel injector is powered by a high pressure accumulator fueled.
  • the control of the injection takes place electro-hydraulically, by the high-pressure fuel source Fuel under pressure in a control room is fed.
  • This control pressure will Valve element of the fuel injector in Closed position held because of the control pressure applied control area is larger than that Actuated area on the fuel injector.
  • the Control room is with a high pressure fuel source first throttle constantly connected and via a second throttle relieved, which is controlled by a solenoid valve.
  • the solenoid valve opens the second throttle, the Relieved control room and the pressure on the pressure surfaces of the Valve member of the injector is sufficient to Bring the valve member into the open position so that and Injection can take place.
  • the solenoid valve second throttle is closed again, due to the Pressure increase in the control room the valve member back in Brought into the closed position.
  • the solenoid valve is coaxial to the axis of the valve member of the injection valve on the housing of the fuel injector attached and has one Plug connection for supplying the power supply of the Solenoid of the solenoid valve and it is also one of the Relief line discharging electromagnets is provided, over which the fuel control quantity at the second throttle can flow to a relief space.
  • Such fuel injectors are replaced by a electrical control switched so that the required Time and amount of high pressure fuel required is fed to the internal combustion engine.
  • the electrical The control circuit is centrally located near the Fuel injectors, one each per Cylinder of the associated internal combustion engine provided is arranged. This arrangement has the disadvantage that long Line connections that are exposed to high currents and generate interference fields to the individual Fuel injection valves must be guided. Farther due to the available performance at quick opening and closing of the solenoid valves in the electrical control circuit standing heat on sufficient Way to be dissipated. This is with one additional effort.
  • the fuel injector according to the invention with the Features of the characterizing part of claim 1 has the compared to the advantage that electrical control circuit in a first circuit part and in second circuit parts is divided, each directly on the fuel injector are provided and the control of the power supply to Electromagnets included.
  • the elements of To provide circuit in the second circuit part which Power components and capacitors of the electrical Control circuit included.
  • the particularly in the Power components, capacitors, output stages and diodes resulting heat is on the individual Injectors distributed and can be optimally there without additional effort for the control of cooling devices be derived. In particular, it is avoided for a long time Provide lines with high current.
  • the Power losses due to voltage drop are reduced and plug connections that are subject to high loads are also avoided, since the high currents only appear in the second part of the circuit and there directly in the shortest line connection to Magnets are guided.
  • the short lines also have yet the advantage that interference emissions are reduced, which are particularly related to the electrical circuit of the Control can impact.
  • the first part of the Control circuit is based on the signal processing components the circuit reduces that from repercussions the power section that controls the solenoid valve is necessary in each case, no longer be disturbed.
  • FIG. 1 In the drawing is a longitudinal section through a fuel injection valve for high pressure injection with one Integrated solenoid valve shown that additionally integrates the second circuit part according to the invention having.
  • a valve closing member 2 In the housing 1 of the fuel injector a valve closing member 2 with a conical sealing surface 3, which comes to rest on a conical valve seat 4, from the injection holes 5 go off. The valve member will then by a compression spring 7 in the closing direction Valve seat 4 acted out.
  • a pressure chamber 9 In the intermediate area of the Valve closing member 2, a pressure chamber 9 is provided, within the one in the opening direction of the Valve closing member facing pressure surface 10 there is subjected to prevailing pressure High pressure supply line 11 is fed to the pressure chamber 9.
  • the high pressure supply line is no further with one shown high pressure accumulator via a high pressure connection 12, which leads across the longitudinal axis of the injection valve, connected.
  • Coaxial with the compression spring 7 also engages in the Valve closing member 2 a plunger 14, which in one Insert part 15 in the housing 1 of the injection valve with its Front 17 delimits a control room 18.
  • This has from High pressure connection 12 ago an inlet with a first Throttle 19 and an outlet to a relief line 21 with a second throttle 20, which is connected by a valve member 22 of a solenoid valve 23 is controlled.
  • the solenoid valve 23 has a spring 24 acting in the closing direction and one Armature 25 on the valve member, which by the electromagnet 26th of the solenoid valve when its coil 27 is energized and thus opens the second throttle 20.
  • the housing 29 of the solenoid valve is by means of a union nut 30 on Injector housing 1 coaxial with the position of the tappet 14 and valve closing member 2 attached.
  • a housing 32 of a circuit part attached which, as shown schematically in the section, Parts of the control circuit as a second circuit part of the Control circuit contains.
  • the main part of the control circuit signal processing in particular takes place here not shown first circuit part of the electrical control while in the second Circuit part within the housing 32 in particular the Power components and energy storage are included as second circuit part.
  • the housing 32 also contains the electrical connection 33 with power supply and Signal supply from the first circuit part.
  • the housing 32 includes an interior 34 that mentioned Shifts circuit parts, and that of the fuel is flowed through to the solenoid valve 23 Relief of the control room 18 to the relief line 21 is dissipated.
  • the electromagnet is from the fuel flowed around and downstream of it also the second Circuit part.
  • a drain pipe 36 is arranged on the housing 32, which over the relief line 21 to a fuel tank leads. In this way, electromagnet and second Circuit part intensively cooled.
  • the housing 32 is preferably made of plastic or Insulating material with additional elastic properties such that the housing also the housing 29 of the Solenoid valve can be clipped on tightly. So that's one easy interchangeability guaranteed.

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  • 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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant (1) s'utilisant pour l'injection sous haute pression dans des moteurs à combustion interne à auto-allumage et qui comporte une électrovanne (23) pour assurer la commande de l'injection. Pour actionner cette électrovanne, il est prévu un circuit de commande divisé en une première partie et en secondes parties (31). Ces dernières sont montées sur chaque soupape d'injection individuelle de manière séparée de la première partie du circuit, qui sert à assurer une commande conjointe de plusieurs soupapes d'injection. Le boîtier est fixé par clips sur la soupape d'injection de carburant et du carburant circule à l'intérieur à des fins de refroidissement.

Claims (6)

  1. Injecteur de carburant pour un système d'injection à haute pression dans la chambre de combustion notamment de moteur à combustion interne à allumage non commandé comprenant une électrovanne (13) commandant la communication entre l'injecteur de carburant et une source de carburant à haute pression ou au moins indirectement par une commande électrique,
    caractérisé en ce que
    la commande électrique comporte un circuit de commande ayant plusieurs injecteurs de carburant commandant une première partie de circuit, commune et des secondes parties de circuit (31) attribuées chaque fois directement à un injecteur de carburant pour commander l'alimentation électrique des électro-aimants (26) de la soupape magnétique (23).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    les secondes parties de circuit (31) ont des composants de puissance et des éléments de mémoire importants pour la commande électrique et cette seconde partie est placée dans un boítier de commande (32) entre l'électro-aimant (23) et un branchement électrique (33) de l'injecteur.
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le boítier de commande (32) comporte également la connexion (33) pour le branchement de la première partie de circuit et ce boítier est appliqué sur le boítier (29) de l'électrovanne.
  4. Injecteur de carburant selon l'une des revendications 2 ou 3,
    caractérisé par
    une conduite de décharge (21) aboutissant à l'électrovanne qui traverse le boítier de commande (32).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    le boítier de commande (32) est fabriqué en matière plastique et ce boítier est notamment clipsé de manière élastique étanche sur le boítier (29) de l'électrovanne.
  6. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    l'électrovanne (23) est reliée dans le prolongement axial avec un boítier (1) de l'injecteur de carburant et le boítier de commande (32) est à son tour fixé dans le prolongement axial au boítier (29) de l'électrovanne.
EP96946069A 1996-05-15 1996-12-11 Soupape d'injection de carburant pour injection sous haute pression Expired - Lifetime EP0840848B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19619523A DE19619523A1 (de) 1996-05-15 1996-05-15 Kraftstoffeinspritzventil für Hochdruckeinspritzung
DE19619523 1996-05-15
PCT/DE1996/002378 WO1997043542A1 (fr) 1996-05-15 1996-12-11 Soupape d'injection de carburant pour injection sous haute pression

Publications (2)

Publication Number Publication Date
EP0840848A1 EP0840848A1 (fr) 1998-05-13
EP0840848B1 true EP0840848B1 (fr) 2002-03-27

Family

ID=7794345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96946069A Expired - Lifetime EP0840848B1 (fr) 1996-05-15 1996-12-11 Soupape d'injection de carburant pour injection sous haute pression

Country Status (9)

Country Link
US (1) US6131540A (fr)
EP (1) EP0840848B1 (fr)
JP (1) JP3737128B2 (fr)
KR (1) KR19990028964A (fr)
CN (1) CN1075870C (fr)
CZ (1) CZ288635B6 (fr)
DE (2) DE19619523A1 (fr)
RU (1) RU2169285C2 (fr)
WO (1) WO1997043542A1 (fr)

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DE19755062A1 (de) 1997-12-11 1999-06-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19827267A1 (de) * 1998-06-18 1999-12-23 Bosch Gmbh Robert Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
DE29814934U1 (de) * 1998-08-20 2000-01-05 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19844742C1 (de) * 1998-09-29 2000-03-09 Siemens Ag Piezoaktorkontaktierung für Einspritzventil
US6367719B1 (en) * 1998-10-22 2002-04-09 Siemens Automotive Corporation Electromechanical valve driver circuit and method
DE19910970A1 (de) * 1999-03-12 2000-09-28 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
DE19921878C2 (de) 1999-05-12 2001-03-15 Daimler Chrysler Ag Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE19937677C2 (de) * 1999-08-10 2003-06-26 Siemens Ag Einspritzventil mit verbesserter Dichtflächenanordnung
DE19939428A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Durchführung einer Kraftstoffeinspritzung
DE19942990A1 (de) * 1999-09-09 2001-03-22 Bosch Gmbh Robert Common-Rail-Injektor
DE19952512A1 (de) * 1999-10-30 2001-05-10 Bosch Gmbh Robert Druckverstärker und Kraftstoffeinspritzsystem mit einem Druckverstärker
JP2001248517A (ja) * 2000-03-01 2001-09-14 Mitsubishi Electric Corp 可変吐出量燃料供給装置
DE10040526A1 (de) 2000-08-18 2002-03-14 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
ITTO20010539A1 (it) * 2001-06-05 2002-12-05 Fiat Ricerche Iniettore di combustibile per un motore a combustione interna.
DE10134868A1 (de) 2001-07-18 2003-02-13 Bosch Gmbh Robert Kraftstoffinjektor mit Schließdruckkompensation
DE10143423A1 (de) 2001-09-05 2003-05-08 Bosch Gmbh Robert Kraftstoffeinspritzsystem mit hydraulisch von der Zuleitung entkoppeltem Injektor
DE10149514A1 (de) 2001-10-08 2003-04-24 Bosch Gmbh Robert Kraftstoffinjektor mit Kompensationselement für Kraftstoffeinspritzsysteme
US6691677B2 (en) * 2002-02-15 2004-02-17 Cummins Inc. Fuel delivery device and fuel delivery system
DE10206908B4 (de) * 2002-02-19 2010-01-07 Continental Automotive Gmbh Injektor mit verbesserter Anschlussgeometrie
US8613297B2 (en) 2003-07-29 2013-12-24 Societe Bic Fuel supply systems having operational resistance
DE10351680A1 (de) 2003-11-05 2005-06-09 Robert Bosch Gmbh Ventil für eine Kraftstoffeinspritzpumpe
CN1317501C (zh) * 2004-04-16 2007-05-23 清华大学 一种发动机用电磁阀驱动电路
DE102008001735A1 (de) * 2008-05-14 2009-11-19 Robert Bosch Gmbh Kraftstoff-Injektor sowie Brennkraftmaschine
DE102008002720A1 (de) 2008-06-27 2009-12-31 Robert Bosch Gmbh Kraftstoffinjektor
DE102008040168A1 (de) * 2008-07-04 2010-01-07 Robert Bosch Gmbh Magnetventil für einen Kraftstoff-Injektor sowie Kraftstoff-Injektor
US8074903B2 (en) * 2009-01-13 2011-12-13 Caterpillar Inc. Stator assembly and fuel injector using same
DE102009002128A1 (de) * 2009-04-02 2010-10-14 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
GB2547684A (en) * 2016-02-26 2017-08-30 Delphi Int Operations Luxembourg Sarl Fuel injector for a combustion engine
CN106014730B (zh) * 2016-05-19 2018-05-18 哈尔滨工程大学 双油路冷却电磁控制喷油器

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EP0740067A2 (fr) * 1995-04-27 1996-10-30 Isuzu Motors Limited Système d'injection de combustible du type à accumulateur
EP0767303A1 (fr) * 1995-10-02 1997-04-09 Hino Motors, Inc. Moteur diesel

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Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
EP0740067A2 (fr) * 1995-04-27 1996-10-30 Isuzu Motors Limited Système d'injection de combustible du type à accumulateur
EP0767303A1 (fr) * 1995-10-02 1997-04-09 Hino Motors, Inc. Moteur diesel

Also Published As

Publication number Publication date
JPH11509604A (ja) 1999-08-24
WO1997043542A1 (fr) 1997-11-20
CN1186538A (zh) 1998-07-01
US6131540A (en) 2000-10-17
KR19990028964A (ko) 1999-04-15
EP0840848A1 (fr) 1998-05-13
CZ288635B6 (cs) 2001-08-15
JP3737128B2 (ja) 2006-01-18
CN1075870C (zh) 2001-12-05
DE59608969D1 (de) 2002-05-02
CZ395197A3 (cs) 1998-06-17
DE19619523A1 (de) 1997-11-20
RU2169285C2 (ru) 2001-06-20

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