EP1421272B1 - Kraftstoffeinspritzvorrichtung für brennkraftmaschinen - Google Patents

Kraftstoffeinspritzvorrichtung für brennkraftmaschinen Download PDF

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Publication number
EP1421272B1
EP1421272B1 EP02760079A EP02760079A EP1421272B1 EP 1421272 B1 EP1421272 B1 EP 1421272B1 EP 02760079 A EP02760079 A EP 02760079A EP 02760079 A EP02760079 A EP 02760079A EP 1421272 B1 EP1421272 B1 EP 1421272B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
fuel
injection
injection device
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
EP02760079A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1421272A1 (de
Inventor
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 EP1421272A1 publication Critical patent/EP1421272A1/de
Application granted granted Critical
Publication of EP1421272B1 publication Critical patent/EP1421272B1/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
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
    • 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
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
    • 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
    • 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
    • F02M63/0049—Combined valve units, e.g. for controlling pumping chamber and injection valve

Definitions

  • the invention is based on a fuel injection device according to the preamble of claim 1.
  • the valve is for controlling the in the control room prevailing pressure as a slide valve and the valve to Switching the injection pressure formed as a seat valve.
  • the fuel injection device shown in FIG. 1 1 for internal combustion engines comprises a high-pressure accumulator 2 (common rail), is mounted in the fuel at a fuel pressure P1. From the high-pressure accumulator 2, the fuel is discharged respectively via pressure lines 3 and injection lines 4 to the individual, projecting into the combustion chamber of the internal combustion engine to be supplied injectors (injectors) 5 , of which in Fig. 1, only one is shown.
  • injectors injectors
  • the valve sealing surface 8 facing away from the end face of the valve member 7 forms a second control surface 14, which limits a control chamber 15 and acts in the valve closing direction.
  • the control chamber 15 is connected via a Z-throttle 16 with the injection line 4 and via an A-throttle 17 and a slide valve 18 with a discharge line (oil leakage) 19 connectable.
  • the second control surface 14 is larger than the first control surface 13, so that when the slide valve 18 is closed, ie at the same pressure in the nozzle chamber 12 and the control chamber 15, the valve member 7, the injection ports 11 closes.
  • a local pressure booster unit 20 is provided with a against the action of a return spring 21 axially displaceable translation piston 22 , which primary side a primary chamber 23 , the secondary side, a secondary chamber 24 and the pressure side, a pressure chamber 25 limited.
  • the primary chamber 23 is connected directly, the secondary chamber 24 via a throttle 26 and the pressure chamber 25 via a check valve 27 to the pressure line 3, wherein the injection line 4 goes off from the pressure chamber 25.
  • the secondary chamber 24 is connected to the discharge line 19. With closed switching valve 28 prevails in all three chambers 23, 24, 25 of the fuel pressure P1 of the pressure accumulator 2, so that the transmission piston 22 is pressed by the return spring 21 in its initial position.
  • the slide valve 18 and the seat valve 28 are combined to form a 4/3 control valve 29 with a common valve body 30 .
  • the valve body 30 is slidably mounted in an axial guide bore 31 of the valve housing and axially adjustable by means of a piezoelectric actuator 32 .
  • the slide valve 18 has on the input side a provided in the wall of the guide bore 29, lower annular space 33 , in which the outgoing from the control chamber 15 line opens.
  • the slide valve 18 On the output side, the slide valve 18 has a provided on the valve body 30, lower annular space 34 , which opens to the annular space 33 through. Via a transverse bore 35 and a longitudinal bore 36 of the valve body 30, the lower annular space 34 of the valve body 30 is connected to the front side of the guide bore 29 outgoing discharge line 19.
  • the slide valve 18 closes when at a stroke H 2 of the valve body 30, the control edge 37 of the annular space 34, the upper sealing edge 38 of the annular space 33 passes over.
  • Fig. 2 the timing of the injection process is plotted in a diagram.
  • the beginning of the injection process is initiated at time t0 by a stroke H 1 of the valve body 30, so that the seat valve 28 opens and the slide valve 18 remains open.
  • the secondary chamber 24 is depressurized, and in the pressure chamber 25 and thus also in the nozzle chamber 12, a higher fuel pressure builds up.
  • the valve member 7 opens under pressure control against the action of the closing spring 9 and is controlled to maximum stroke h max , so that the injection takes place with the pressure prevailing in the nozzle chamber 12 fuel pressure.
  • the maximum injection pressure P max results from the piston cross-sectional ratio in the primary and pressure chambers 23, 25.
  • the slide valve 18 is closed by a stroke H 2 of the valve body 30.
  • the control chamber 15 is no longer depressurized, and the pressure in the control chamber 15 increases, so that the valve member 7 closes the injection openings 11 in a stroke-controlled manner.
  • the slide valve 18 is opened and the seat valve 28 is closed.
  • the control chamber 15 is depressurized again, and the valve member 7 opens hubsammlung, so that a post-injection with the prevailing in the injection chamber 12 fuel pressure, for example, with P max occurs.
  • the injection process is terminated at time t4 when the fuel pressure prevailing in the nozzle chamber 12 becomes smaller than the opening pressure P S. Due to the no longer pressure-relieved secondary chamber 24, the transmission piston 22 is pressed by the return spring 21 in its initial position and the pressure chamber 25 filled with fuel from the pressure accumulator 2.

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)
EP02760079A 2001-08-22 2002-07-05 Kraftstoffeinspritzvorrichtung für brennkraftmaschinen Expired - Lifetime EP1421272B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10141110A DE10141110A1 (de) 2001-08-22 2001-08-22 Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10141110 2001-08-22
PCT/DE2002/002463 WO2003018995A1 (de) 2001-08-22 2002-07-05 Kraftstoffeinspritzvorrichtung für brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP1421272A1 EP1421272A1 (de) 2004-05-26
EP1421272B1 true EP1421272B1 (de) 2005-06-29

Family

ID=7696228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760079A Expired - Lifetime EP1421272B1 (de) 2001-08-22 2002-07-05 Kraftstoffeinspritzvorrichtung für brennkraftmaschinen

Country Status (6)

Country Link
US (1) US6871636B2 (ja)
EP (1) EP1421272B1 (ja)
JP (1) JP4204467B2 (ja)
DE (2) DE10141110A1 (ja)
ES (1) ES2244798T3 (ja)
WO (1) WO2003018995A1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10251932B4 (de) * 2002-11-08 2007-07-12 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung mit integriertem Druckverstärker
DE10315016A1 (de) * 2003-04-02 2004-10-28 Robert Bosch Gmbh Kraftstoffinjektor mit leckagefreiem Servoventil
DE602005002758T2 (de) 2004-01-13 2008-07-24 Delphi Technologies, Inc., Troy Kraftstoffeinspritzventil
JP4695453B2 (ja) * 2005-07-29 2011-06-08 株式会社豊田中央研究所 方向制御弁
DE102005059437A1 (de) 2005-12-13 2007-06-14 Robert Bosch Gmbh Kraftstoffinjektor
DE102006026381A1 (de) * 2006-06-07 2007-12-13 Robert Bosch Gmbh Kraftstoffinjektor mit Druckübersetzer und niederdruckseitig angeordnetem Piezosteller
US10982635B2 (en) * 2012-05-29 2021-04-20 Delphi Technologies Ip Limited Fuel injector and method for controlling the same
DE102019218432A1 (de) * 2019-11-28 2021-06-02 Robert Bosch Gmbh Einstoffinjektor und Einspritzsystem zum Einspritzen eines Mediums

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS188353B1 (en) * 1975-02-14 1979-03-30 Jaromir Indra Displacement valve for the injection pump of the combustion engines
GB9616521D0 (en) * 1996-08-06 1996-09-25 Lucas Ind Plc Injector
DE19910970A1 (de) 1999-03-12 2000-09-28 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
DE19939448A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Injektor
DE19956598A1 (de) * 1999-11-25 2001-06-13 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
US20030089802A1 (en) * 2000-01-20 2003-05-15 Bernd Mahr Injection device and method for injecting a fluid
DE10008268A1 (de) 2000-01-20 2001-08-02 Bosch Gmbh Robert Einspritzeinrichtung und Verfahren zum Einspritzen von Fluid
DE10002702A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
JP2001323858A (ja) * 2000-05-17 2001-11-22 Bosch Automotive Systems Corp 燃料噴射装置
DE10031278A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen

Also Published As

Publication number Publication date
DE10141110A1 (de) 2003-03-20
JP4204467B2 (ja) 2009-01-07
JP2005500472A (ja) 2005-01-06
DE50203522D1 (de) 2005-08-04
EP1421272A1 (de) 2004-05-26
US20040055573A1 (en) 2004-03-25
US6871636B2 (en) 2005-03-29
ES2244798T3 (es) 2005-12-16
WO2003018995A1 (de) 2003-03-06

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