EP1247978A2 - Système d'injection de carburant pour un moteur à combustion interne - Google Patents

Système d'injection de carburant pour un moteur à combustion interne Download PDF

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Publication number
EP1247978A2
EP1247978A2 EP02007620A EP02007620A EP1247978A2 EP 1247978 A2 EP1247978 A2 EP 1247978A2 EP 02007620 A EP02007620 A EP 02007620A EP 02007620 A EP02007620 A EP 02007620A EP 1247978 A2 EP1247978 A2 EP 1247978A2
Authority
EP
European Patent Office
Prior art keywords
pressure
piston
fuel
injection system
fuel injection
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
EP02007620A
Other languages
German (de)
English (en)
Other versions
EP1247978A3 (fr
EP1247978B1 (fr
Inventor
Michael Dr. Willmann
Albert Kloos
Gerd Huber
Paul Neumeier
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen 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 MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP1247978A2 publication Critical patent/EP1247978A2/fr
Publication of EP1247978A3 publication Critical patent/EP1247978A3/fr
Application granted granted Critical
Publication of EP1247978B1 publication Critical patent/EP1247978B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M63/0003—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
    • 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
    • F02M63/0003—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
    • 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
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention relates to a fuel injection system for an internal combustion engine according to the Preamble of claim 1.
  • DE 197 34 354 A1 describes a fuel injection system for one Internal combustion engine of this type is known, which is a pressure control valve for time-dependent Modulation of the amount of fuel injected during the injection process.
  • an adjustment device is provided Control of this modulation valve is provided, which a fuel on both sides contains loaded piston.
  • This controls a valve needle body Modulation valve due to a resultant force difference on both sides of the Piston acting pressure forces. It is double-acting on the front Piston a fuel under high pressure in the opening direction of the Modulation valve pressurized first pressure chamber and on the back of the two sides acting piston a second pressure chamber acted upon by fuel in the closing direction intended.
  • the second pressure chamber is on both sides during the shift acting piston in the sense of opening the modulation valve via one with a Throttle point provided drain channel relieved of pressure.
  • a storage injection device of a similar type is known from DE 199 30 276 A1 which to implement a second pressure level in the fuel injector high pressure fuel supplying high pressure fuel line Switch valve is provided.
  • the switching valve When the switching valve is closed, the fuel injector is activated a residual pressure supplied via a between the switching valve and the Pressure maintaining valve provided in the high-pressure fuel line is held.
  • the object of the invention is to provide an improved fuel injection system in which there is the possibility of shaping the injection pressure curve.
  • the invention provides a fuel injection system for an internal combustion engine, especially a diesel engine.
  • the fuel injection system includes one via a high-pressure fuel line with fuel held under high pressure supplied fuel injector for injecting the fuel into the combustion chamber Internal combustion engine during an injection process. Furthermore, one in the High pressure fuel line upstream of the fuel injector pressure control valve Control of the pressure of the fuel injected during the injection process intended.
  • the pressure control valve contains a freely displaceable one bilaterally effective pistons and one in the flow path of the High pressure fuel line switched slide to open and close the Flow cross-section of the flow path of the high-pressure fuel line in Depends on the position of the piston.
  • a control valve is used to set the pressures in the first and / or second pressure chamber in the sense of a displacement of the piston in the opening or Closing direction provided.
  • the fuel injection system is the first one provided at the front of the piston Pressure chamber via a first flow connection with the upstream side of the High pressure fuel line in connection, and that at the rear of the piston
  • the second pressure chamber provided is connected to the through a second flow connection downstream side of the high pressure fuel line.
  • the control valve is preferably used to adjust the pressure of the first pressure chamber intended.
  • control valve is in one of the first Pressure line connected discharge line provided.
  • the control valve includes a proportional actuator.
  • Such a proportional actuation device is particularly advantageously by a piezo actuator is formed.
  • An inlet throttle is preferably provided in the first flow connection connecting the first pressure chamber with the upstream side of the high-pressure fuel line. It is also advantageous if a damping throttle is provided in the second flow connection which is connected to the downstream side of the high-pressure fuel line.
  • the is on the Rear of the piston provided second pressure chamber with the downstream side of the high pressure fuel line connecting second flow connection as one in the Piston-extending flow channel is formed.
  • the second one provided on the rear of the piston Pressure chamber connecting to the downstream side of the high-pressure fuel line second flow connection can be designed as an external channel.
  • the slide is preferably formed in one piece with the piston, the first and second pressure chambers are provided at the ends of the piston and the slide in a central region of the piston is provided.
  • the second flow connection forming flow channel in the longitudinal direction of the piston of the second pressure chamber to the flow path of the high-pressure fuel line forming cross connection runs.
  • the figure shows a schematic block diagram of an embodiment of the fuel injection system according to the invention.
  • Reference numeral 1 denotes a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine, in particular a diesel engine, while an injection process.
  • the fuel injector 1 is kept under high pressure Fuel is supplied via a high-pressure fuel line 13.
  • the High-pressure fuel line 13 is connected to a line not specifically shown in the figure High-pressure accumulator connected, like an oil-elastic high-pressure accumulator works and in which the fuel by means of a, also not shown High-pressure pump is pumped from a fuel supply (common rail system).
  • the fuel injector 1 can be constructed in a conventional manner, comprising one Injection nozzle 28, which is provided in the fuel injector 1 when the load is released Control room 41 is opened.
  • the control room 41 is from the High-pressure fuel line 13 via a control pressure line 42, in which one Inlet throttle 4 is provided, fuel under high pressure is supplied.
  • a relief line 44 into which a Return throttle 10 is connected and which by means of a control valve 5 to a Leakage line 48 can be relieved of pressure, a control quantity R being generated.
  • the control valve 5 can be controlled via an actuating device 8, for example by means of a piezo actuator.
  • the fuel injector 1 is in the flow path of the high-pressure fuel line 13 upstream a pressure control valve 26 is provided.
  • This contains one free displaceable pistons 30 acting on both sides and, integrally formed with this, a slide 32 for opening and closing the passage cross section of the Flow path of the high pressure line 13 depending on the position of the piston 30.
  • Acting first pressure chamber 36 is provided, and on the back of the piston 30th is a second acting on the piston 30 in the closing direction of the slide 32 Pressure chamber 38 formed.
  • the first pressure chamber 36 provided on the front of the piston 30 is via a first flow connection 20 to the upstream side of FIG High-pressure fuel line 13 connected.
  • the one on the rear of the piston 30 The second pressure chamber provided is connected to the through a second flow connection downstream side of the high-pressure fuel line 13 in connection, which the Provides fuel to the fuel injector 1.
  • a control valve 14, 16 which is generally used to adjust the pressure conditions in the two pressure chambers 36, 38 in the sense of a displacement of the piston 30 in the opening or Closing direction is used in the embodiment shown in the figure Setting the pressure of the first pressure chamber 36 in an at the first pressure chamber 36 connected relief line 40 is provided.
  • the control valve also includes a proportional actuator 16 which is proportional Opening and closing the valve body 14 of the control valve 14, 16 via a predetermined setting range allowed.
  • the proportional actuator 16 is in particular formed by a piezo actuator.
  • a Inlet throttle 18 is provided, via which the first pressure chamber 36 from the High-pressure fuel line 13 with a predetermined amount of fuel per unit time is filled. From the ratio of the first via the first flow connection 20 Pressure chamber 36 inflowing amount of fuel and the discharge line 40 and the control valve 14, 16 flowing fuel quantity, the pressure in the first Pressure chamber 36, which acts on the piston 30 in the opening direction of the slide 32.
  • Pressure chamber 38 with the downstream side of the high-pressure fuel line 13 connecting second flow connection is provided as a flow channel 22 which in the piston 30 is formed centrally in its longitudinal direction and from which second pressure chamber 38 to the flow path of the high-pressure fuel line 13 leads cross connection.
  • this second flow connection is as an external channel 24 formed, which outside of the piston 30 from the second pressure chamber 38 to the downstream side of the high-pressure fuel line 13 leads.
  • the fuel injection system on the high-pressure fuel line 13 High pressure fuel as working fluid above that in the first Flow throttle 20 provided inlet throttle 18 to the first pressure chamber 36 fed.
  • the valve body of the control valve 14, 16 (2/2-valve) by the Piezo actuator 16 is controlled, any pressure in the first pressure chamber 36 can be set.
  • This pressure represents the benchmark for the proportionately working Pressure control valve 26.
  • the in the flow path of the high-pressure fuel line 13th switched slide 32 assumes a position that is from the pressure balance in the first and second pressure chambers 36, 38 is defined on the piston 30 acting on both sides.

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)
EP02007620A 2001-04-06 2002-04-04 Système d'injection de carburant pour un moteur à combustion interne Expired - Fee Related EP1247978B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10117401A DE10117401C2 (de) 2001-04-06 2001-04-06 Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE10117401 2001-04-06

Publications (3)

Publication Number Publication Date
EP1247978A2 true EP1247978A2 (fr) 2002-10-09
EP1247978A3 EP1247978A3 (fr) 2004-01-14
EP1247978B1 EP1247978B1 (fr) 2004-12-29

Family

ID=7680774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007620A Expired - Fee Related EP1247978B1 (fr) 2001-04-06 2002-04-04 Système d'injection de carburant pour un moteur à combustion interne

Country Status (4)

Country Link
US (1) US6729302B2 (fr)
EP (1) EP1247978B1 (fr)
AT (1) ATE286207T1 (fr)
DE (2) DE10117401C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2410168A1 (fr) * 2010-07-23 2012-01-25 Wärtsilä Schweiz AG Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006003484A1 (de) * 2005-03-16 2006-09-21 Robert Bosch Gmbh Vorrichtung zum Einspritzen von Kraftstoff
DE102005058556B4 (de) * 2005-12-08 2017-04-06 Man Diesel & Turbo Se Injektor eines Kraftstoffeinspritzsystems
US8191534B2 (en) * 2008-02-28 2012-06-05 General Electric Company High viscosity fuel injection pressure reduction system and method
DE102013204093B4 (de) * 2013-03-11 2021-03-18 Mtu Friedrichshafen Gmbh Verfahren zur Entlüftung einer Kraftstoffversorgungsleitung und Brennkraftmaschine
JP6739848B2 (ja) * 2016-12-02 2020-08-12 学校法人明治大学 燃料噴射装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734354A1 (de) 1997-08-08 1999-02-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE19930276A1 (de) 1998-07-02 2000-01-27 Avl List Gmbh Speichereinspritzeinrichtung

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JPS49108427A (fr) * 1973-02-19 1974-10-15
US3792390A (en) * 1973-05-29 1974-02-19 Allis Chalmers Magnetic actuator device
DE2803049A1 (de) * 1978-01-25 1979-08-09 Bosch Gmbh Robert Pumpe-duese fuer brennkraftmaschinen
DE2806788A1 (de) * 1978-02-17 1979-08-23 Bosch Gmbh Robert Pumpe-duese fuer brennkraftmaschinen
US4247052A (en) * 1979-10-09 1981-01-27 General Motors Corporation Electromagnetic fuel injector
US4450783A (en) * 1982-09-30 1984-05-29 Cummins Engine Company, Inc. Electronically controlled fuel pump
US4559511A (en) * 1983-04-19 1985-12-17 Westinghouse Electric Corp. Vacuum contactor having DC electromagnet with improved force watts ratio
JP2719924B2 (ja) * 1988-05-10 1998-02-25 株式会社ゼクセル 増圧式ユニットインジェクタ
US4928028A (en) * 1989-02-23 1990-05-22 Hydraulic Units, Inc. Proportional permanent magnet force actuator
US5720261A (en) * 1994-12-01 1998-02-24 Oded E. Sturman Valve controller systems and methods and fuel injection systems utilizing the same
AT1624U1 (de) * 1995-03-30 1997-08-25 Avl Verbrennungskraft Messtech Speichereinspritzsystem mit voreinspritzung für eine brennkraftmaschine
US6163239A (en) * 1997-08-25 2000-12-19 Mitsubishi Denki Kabushiki Kaisha Duty driven solenoid valve
JPH11182376A (ja) 1997-12-15 1999-07-06 Zexel:Kk 筒内噴射装置
JP4445072B2 (ja) * 1998-10-20 2010-04-07 ヴェルトジィレ シュヴァイツ アクチェンゲゼルシャフト ディーゼルエンジンのシリンダへの液体噴射装置及びディーゼルエンジン
DE50000490D1 (de) * 1999-03-01 2002-10-17 Siemens Ag Anordnung und verfahren zur regelung eines steuerventils für ein diesel-einspritzsystem
DE19910589C2 (de) * 1999-03-10 2002-12-05 Siemens Ag Einspritzventil für eine Brennkraftmaschine
DE19921878C2 (de) * 1999-05-12 2001-03-15 Daimler Chrysler Ag Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734354A1 (de) 1997-08-08 1999-02-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE19930276A1 (de) 1998-07-02 2000-01-27 Avl List Gmbh Speichereinspritzeinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2410168A1 (fr) * 2010-07-23 2012-01-25 Wärtsilä Schweiz AG Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide

Also Published As

Publication number Publication date
DE50201867D1 (de) 2005-02-03
ATE286207T1 (de) 2005-01-15
EP1247978A3 (fr) 2004-01-14
DE10117401C2 (de) 2003-02-27
DE10117401A1 (de) 2002-10-17
US20020179063A1 (en) 2002-12-05
US6729302B2 (en) 2004-05-04
EP1247978B1 (fr) 2004-12-29

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