EP1144862B1 - Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem steuerschieber - Google Patents

Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem steuerschieber Download PDF

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Publication number
EP1144862B1
EP1144862B1 EP00979437A EP00979437A EP1144862B1 EP 1144862 B1 EP1144862 B1 EP 1144862B1 EP 00979437 A EP00979437 A EP 00979437A EP 00979437 A EP00979437 A EP 00979437A EP 1144862 B1 EP1144862 B1 EP 1144862B1
Authority
EP
European Patent Office
Prior art keywords
valve member
control valve
fuel injection
injection device
control
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
EP00979437A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1144862A1 (de
Inventor
Jaroslaw Hlousek
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 EP1144862A1 publication Critical patent/EP1144862A1/de
Application granted granted Critical
Publication of EP1144862B1 publication Critical patent/EP1144862B1/de
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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • 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
    • F02M63/0005—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 valves actuated by fluid 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

Definitions

  • 3/2-way valves which include spool whose stroke affects the course of injection.
  • the spools perform in the housing of a 3/2-way valve strokes, the seat surfaces and control edges of the spool are exposed to high stresses.
  • the spools which enable and shut off the fuel supply to the injector, are enclosed by a housing.
  • Spools and housing bores are designed with the tightest diameter tolerances to maximize fuel metering and minimize leakage losses.
  • the metering of the fuel takes place via outlet and inlet side control edges and is dependent on the stroke of the spool in the housing of the 3/2-way valve.
  • the mechanical loads on the seats are very high, since the movements of the spool are largely unattenuated.
  • a fuel injection device for internal combustion engines with a high-pressure pump filled with fuel common high-pressure accumulation chamber is known, which is connected via injection lines with projecting into the combustion chamber of the engine to be supplied injectors.
  • the opening and closing movements of the injection valves are each controlled by an electrically controlled control valve.
  • conically shaped valve seats are provided in each case to close or release the connection from the fuel inlet to the injection valve member or the injection valve member in the fuel return.
  • the lifting movement is damped in the end positions such that the life of this component increases significantly within the 3/2-way valve body.
  • hydraulically acting damper can be formed at the end portions of the spool to each other offset diameter pairs with which in the end portions of the spool comprehensive chambers, a pressure balance can be generated by which the strokes of the spool are each attenuated.
  • the service life of acting as a spool cylindrical element can be significantly extended. If the abutment surfaces opposite the end surfaces of the spool are designed as flat annular surfaces, the processing is simpler and, on the other hand, the wear resistance of a stop surface formed in this way is considerably higher compared with a conical seat, for example.
  • an actuator provided above the upper control chamber can be actuated, whereby the pressure in the upper control chamber is lowered, which in turn moves the control spool to its upper end position.
  • the inlet to the injection nozzle is opened and charged with the fuel under high pressure.
  • control valve member is enclosed by a sleeve which is shrunk into the housing of the 3/2-way valve and thus easily interchangeable in case of repair.
  • the housing of the injector can be made of inexpensive material, while in this variant, only the sleeve can be made of high quality material.
  • the control edges, which result between the shrunk into the housing of the 3/2-way valve sleeve and the heels of the control valve member are made with tight tolerances, so that set minimal leakage.
  • a control of the course of the injection can be caused by a stroke-dependent throttling, for example, the actuator is performed above the upper control chamber as a piezo actuator.
  • a stage can be carried out below the inlet-side control edge, with which an inlet-side throttling as a function of the stroke of the control valve member can be achieved.
  • the 3/2-way valve unit 3 provided between high-pressure accumulator 1 (common rail) and injection nozzle 2 is arranged.
  • a supply line extends to a high-pressure pump 26, into which a return flow line 27 opens and which acts on a high-pressure accumulator 1 with fuel under high pressure.
  • supply lines 28 extend to the respective 3/2-way valve units 3, one of which is shown here in more detail.
  • the upper end portion of the control valve member 5 protrudes with the stepped diameters 22, 6 in the control chamber 17 into it. If this is closed by the non-energized actuator 4 and the 2/2-way valve 55, the diameter stage 22, 6 acts as a hydraulic damping element for the control valve member fifth
  • the expansion-side inlet opening to the high-pressure line 9 to the injection nozzle 2 releases by upward relaxation of the control valve member 5 by relaxation of the control chamber 17.
  • the high-pressure fuel enters the sleeve 15 through the supply line 28 and enters the high-pressure line 9 through the opening released by the control edges 19, 19 '.
  • the control edge surfaces 19, 19 'and 20, 20' - the drain-side opening so that no leakage losses occur on the control valve 5.
  • control valve member 5 assumes the position shown in Figure 1; the inlet-side control edges 20, 20 'are opened, the fuel can enter through the Abêtbohrung 11, the overflow 12 in the lower region of the control valve member 5 in the discharge line 13, which in turn opens into the fuel tank 24.
  • the overflow channel 12 receiving part of the control valve member 5 is carried out in a diameter 7 which is enclosed by the sleeve 15, which is designed in a diameter 7 ', which can be narrowest tolerances and thereby achieve the lowest leakage losses.
  • a further diameter region 21 is provided which has a somewhat smaller diameter 21 than the diameter 7.
  • a diameter graduation 7, 21 is pronounced in the lower end region, which acts as a damping element on the downward movement of the control valve member 5 and counteracts the premature wear on the lower stop of the sleeve 15.
  • the lifting movement of the control valve member 5 is attenuated when approaching the upper flat annular surface of the stop 18.
  • the flow area at the diameter 6, ie the clearance between the control valve member 5 and the guide sleeve 15 is dimensioned smaller than the cross section of the valve throttle 16 in the upper stop 18.
  • the 3/2-way valve 3 according to the invention can be received directly in the injector or designed as a mounting unit which can be installed between the high-pressure accumulator 1 (common rail) and the injection nozzle 2.
  • a control valve member 5 which is movable in a shrunk-in sleeve 15, is reproduced with the injection profile forming the inlet-side step 23.
  • stage 23 Below the inlet-side control edges 19, 19 'on the control valve member 5, a tapered conically towards the lower stop 8, for example, stage 23 is shown, with which the course of the injection can be influenced by throttling as a function of the stroke of the control valve member 5.
  • a further shaping and influencing of the injection course could be realized by a variable throttling on the 2/2-way valve 55, for example by a piezo actuator.
  • a safeguard against the occurrence of an undesirable, uncontrollable entry quantity can be effected in that the control valve 5 is not moved in normal operation to the stop 18 down, but that the contact between the upper portion of the control valve member 5 and the annular surface 18 only in case of failure of the actuator 4 or the 2/2-way valve 55 takes place.
  • the Abjuribohrung 11 can be moved to the 11 'designated position, whereby a pressure relief of the injector 2 by outflow of high pressure fuel via the overflow channel 12 and the pressure relief line 13 can be made in the storage tank 24.

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)
EP00979437A 1999-10-21 2000-10-20 Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem steuerschieber Expired - Lifetime EP1144862B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19950779A DE19950779A1 (de) 1999-10-21 1999-10-21 Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem Steuerschieber
DE19950779 1999-10-21
PCT/DE2000/003692 WO2001029410A1 (de) 1999-10-21 2000-10-20 Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem steuerschieber

Publications (2)

Publication Number Publication Date
EP1144862A1 EP1144862A1 (de) 2001-10-17
EP1144862B1 true EP1144862B1 (de) 2007-07-11

Family

ID=7926445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00979437A Expired - Lifetime EP1144862B1 (de) 1999-10-21 2000-10-20 Hochdruckkraftstoffinjektor mit hydraulisch gesteuertem steuerschieber

Country Status (8)

Country Link
US (1) US6382189B1 (ja)
EP (1) EP1144862B1 (ja)
JP (1) JP2003512565A (ja)
KR (1) KR100703921B1 (ja)
CN (1) CN1179123C (ja)
DE (2) DE19950779A1 (ja)
RU (1) RU2256816C2 (ja)
WO (1) WO2001029410A1 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947779A1 (de) * 1999-10-02 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19951554A1 (de) * 1999-10-26 2001-05-10 Bosch Gmbh Robert Kraftstoffinjektor mit integrierter Durchflussbegrenzung
DE10020867B4 (de) * 2000-04-28 2006-07-06 Robert Bosch Gmbh Common-Rail-Injektor
DE10031574B4 (de) * 2000-06-29 2008-12-04 Robert Bosch Gmbh Druckgesteuerter doppelschaltender Hochdruckinjektor
DE10032924A1 (de) * 2000-07-06 2002-01-24 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10060812A1 (de) * 2000-12-07 2002-06-13 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10157411A1 (de) 2001-11-23 2003-06-26 Bosch Gmbh Robert Injektor zur Hochdruckeinspritzung von Kraftstoff
DE10209527A1 (de) * 2002-03-04 2003-09-25 Bosch Gmbh Robert Einrichtung zur druckmodulierten Formung des Einspritzverlaufes
US7278593B2 (en) * 2002-09-25 2007-10-09 Caterpillar Inc. Common rail fuel injector
US7174717B2 (en) * 2003-12-24 2007-02-13 Pratt & Whitney Canada Corp. Helical channel fuel distributor and method
DE102004054589B4 (de) * 2004-11-11 2008-09-11 Continental Automotive Gmbh Steuerventil und Einspritzventil
DE102006007574A1 (de) * 2006-02-18 2007-08-30 Man Diesel Se Steuerventil eines Einspritzinjektors für Schwerölbetrieb
DE102008035087B4 (de) * 2008-07-28 2015-02-12 Continental Automotive Gmbh Einspritzventil
US8839764B2 (en) * 2008-10-10 2014-09-23 Robert Bosch Gmbh Fuel supply system for heavy oil common-rail injection systems
CN106286055B (zh) * 2015-05-19 2019-05-24 上海夏雪科技有限公司 流体分配器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703722C2 (de) * 1977-01-29 1986-09-04 Audi AG, 8070 Ingolstadt Kraftstoff-Einspritz-Anlage
GB8729087D0 (en) * 1987-12-12 1988-01-27 Lucas Ind Plc Control valve
JPH03118254A (ja) * 1989-09-29 1991-05-20 Daihatsu Motor Co Ltd 車両におけるシートの取付構造
DE4142998C1 (ja) * 1991-12-24 1993-07-22 Robert Bosch Gmbh, 7000 Stuttgart, De
JP3099546B2 (ja) * 1992-09-16 2000-10-16 トヨタ自動車株式会社 燃料噴射弁
US5499608A (en) * 1995-06-19 1996-03-19 Caterpillar Inc. Method of staged activation for electronically actuated fuel injectors
US5954487A (en) * 1995-06-23 1999-09-21 Diesel Technology Company Fuel pump control valve assembly
DE19701879A1 (de) * 1997-01-21 1998-07-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19708104A1 (de) * 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil
DE19715234A1 (de) * 1997-04-12 1998-06-25 Daimler Benz Ag Magnetventilgesteuertes direkteinspritzendes Kraftstoffeinspritzventil für Speichereinspritzsysteme von mehrzylindrigen Brennkraftmaschinen
DE19716220B4 (de) * 1997-04-18 2007-08-23 Robert Bosch Gmbh Kraftstoffeinspritzeinheit für Brennkraftmaschinen
DE19732070C2 (de) * 1997-07-25 2001-02-01 Daimler Chrysler Ag Direkteinspritzendes Kraftstoffeinspritzventil mit Magnetventilsteuerung für eine mehrzylindrige Brennkraftmaschine
DE19742073A1 (de) * 1997-09-24 1999-03-25 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19749001A1 (de) * 1997-11-06 1999-05-27 Daimler Chrysler Ag Speichereinspritzsystem für eine mehrzylindrige Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
RU2256816C2 (ru) 2005-07-20
US6382189B1 (en) 2002-05-07
CN1327516A (zh) 2001-12-19
EP1144862A1 (de) 2001-10-17
KR100703921B1 (ko) 2007-04-05
KR20010093168A (ko) 2001-10-27
JP2003512565A (ja) 2003-04-02
WO2001029410A1 (de) 2001-04-26
DE50014473D1 (de) 2007-08-23
CN1179123C (zh) 2004-12-08
DE19950779A1 (de) 2001-04-26

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