EP0792413B1 - Systeme d'injection de carburant pour moteurs a combustion interne - Google Patents

Systeme d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP0792413B1
EP0792413B1 EP96914980A EP96914980A EP0792413B1 EP 0792413 B1 EP0792413 B1 EP 0792413B1 EP 96914980 A EP96914980 A EP 96914980A EP 96914980 A EP96914980 A EP 96914980A EP 0792413 B1 EP0792413 B1 EP 0792413B1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
injection system
pressure
feed pump
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
EP96914980A
Other languages
German (de)
English (en)
Other versions
EP0792413A1 (fr
Inventor
Wilhelm Eyberg
Rainer Burkel
Bernhard Bronkal
Norbert Knab
Martin Grosser
Andreas Werner
Bernd Spielmann
Rainer Oettinger
Peter Schubert
Klaus Scherer
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 EP0792413A1 publication Critical patent/EP0792413A1/fr
Application granted granted Critical
Publication of EP0792413B1 publication Critical patent/EP0792413B1/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
    • 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
    • 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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the invention relates to a fuel injection system for Internal combustion engines according to the preamble of claim 1 out.
  • a fuel injection system is due to the DE 43 18 078 A1 known.
  • the High pressure accumulator has significant pressures that are well above 1,000 bar. Because such high pressure accumulators also Have connection points for pressure lines and Connection points for the fuel supply is the danger given a leak. Leakages point in the Usually very small cross sections, which then in the pending high fuel pressure in the high pressure accumulator fine-jet, barely visible leaks of fuel lead in the way of fuel injection jets like them occur with fuel injectors themselves. Such Fuel jets have significant kinetic energy on that can be destructive and especially People living in the area of such high pressure fuel storage handle, endanger.
  • the invention has the advantage that the escaping fuel is caught by the envelope and then can be derived so that the aforementioned Damage does not occur.
  • Wrapping from a net-like envelope according to Claim 3 the highest level of flexibility and Fatigue strength permits and yet the leakage of avoids harmful fuel jets.
  • a collecting device for the escaping fuel provided, which is advantageous according to claim 6 by a Liquid level measuring device can be monitored.
  • the high-pressure container is particularly simple within one already at the internal combustion engine provided cylinder head cover with which the Gas exchange valve train is closed to the outside, on the one hand to avoid damage and on the other hand to Collection of lubricating oil via an oil return Oil collecting tank of the internal combustion engine is returned. This also serves to absorb leaking Leak fuel from the high pressure accumulator.
  • the lubricating oil of the internal combustion engine is not excessive Dilution obtained by the fuel and the fact of such beginning dilution is quickly displayed and / or too high due to possible control interventions Thinning is prevented automatically.
  • FIG. 1 shows a schematic illustration of a Fuel injection system according to the genus of Claim
  • Figure 2 shows a first invention Design of a casing of the high pressure accumulator Fuel injection system
  • Figure 3 shows a second Embodiment of a casing of the high pressure accumulator with a substantially closed sheet metal jacket
  • Figure 4 shows a third embodiment of the invention one housed within a cylinder head cover High-pressure accumulator in a simplified schematic representation.
  • a fuel injection system is shown schematically in FIG shown, which has a fuel tank 1, from which a high-pressure feed pump 3 is connected via a suction line 2 Sucks in fuel and via a pressure line 4 below High pressure in a high-pressure fuel reservoir 6 promotes.
  • the fuel pressure in this high-pressure fuel reservoir is monitored by a pressure sensor 7 and by him output value in a control device 9 with a Setpoint compared.
  • a pressure point device 10 driven e.g. the kind that about a adjustable valve which in a relief line 11 of the High-pressure fuel reservoir 6 is arranged above surplus fuel is returned to the tank becomes.
  • Fuel injection valves 12 are intended by the high-pressure fuel storage a plurality of fuel injection valves 12 via pressure lines 14 fueled.
  • the injection timing and the Injection duration of fuel over this Fuel injection valves are controlled electrically, e.g. B. by solenoid valves from the control unit 9th according to the requirements, for example from speed and load, can be controlled.
  • FIG. 2 is again shown schematically, the high pressure accumulator 6 provided.
  • a shell made of a fine-mesh Steel network 15 exists.
  • this wrapping can also in a net-like structure created in another way exist, e.g. B. slotted metal sheet, as in Expanded metal is possible.
  • the mesh-like sheath 15 preferably consists of mechanically resistant material, in particular Metal, the high-pressure fuel accumulator on all sides enclosing.
  • the covering can also be made of plastic or glass / carbon fiber material are made with high stability against leaking fuel.
  • enclosing can also be limited to the areas be in which between the high pressure fuel accumulator and other parts of the fuel injection system connections, in particular of a soluble type.
  • this wrapper ensures that fuel leaking at leaks, which due to the high pressure at this point has a fine jet emerges with high kinetic energy, similar to one Injection jet of an injector, thus prevents that no such fuel jets can cause damage.
  • the beam is caught by the coating or broken and can in particular handling people in Area of the high-pressure accumulator no longer become dangerous.
  • a fluid level which in turn can be detected by a liquid level measuring device 17 can and a control device 18 is supplied by a signal device 19 or a control signal for Influencing the fuel injection system to the Control device 9 is delivered.
  • a signal can then affect the fuel injection system that it may be stopped by the High pressure feed pump 3 is turned off or by the Pressure in the high-pressure accumulator 6 via the pressure control device 10 is reduced to a low value, which if necessary no matter how high it is to some emergency operation maintain. Or else it will be the pressure of the High-pressure accumulator completely lowered and the activity of Injectors set to zero.
  • the high-pressure feed pump 3 can also be switched off by the fact that between this and its drive 26th an electrically switchable clutch 27 is provided e.g. can be switched by the control device 18.
  • This Coupling can not only occur when an above occurs described leakage but also in others Malfunctions of the fuel injection system, e.g. at faulty operation of the internal combustion engine switched be, or even in selected operating conditions that require a lowering of the pressure in the high-pressure accumulator be switched.
  • the shutdown of the high pressure feed pump can be checked using a test cycle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Système d'injection de carburant pour des moteurs à combustion interne comportant une pompe de transfert à haute pression (3) qui alimente en carburant un réservoir à haute pression (6), à partir duquel plusieurs injecteurs de carburant (12) sont alimentés en carburant par l'intermédiaire de conduites de pression (14), ces injecteurs étant commandés par des soupapes à commande électrique,
    caractérisé en ce que
    le réservoir à haute pression (6) comporte une installation de collecte de carburant de fuite sous la forme d'une enveloppe (15, 20, 26) constituée par un filet qui forme les orifices de sortie (21, 24) du carburant de fuite.
  2. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    l'enveloppe est en matière plastique ou en fibres de verre.
  3. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    l'enveloppe est en métal.
  4. Système d'injection de carburant selon la revendication 3,
    caractérisé en ce que
    l'enveloppe est un filet en acier (15).
  5. Système d'injection de carburant selon l'une quelconque des revendications 2 à 4,
    caractérisé par
    une installation de collecteur (16, 25) munie d'un retour de carburant en dessous de l'enveloppe (15) pour le carburant qui s'échappe de l'enveloppe.
  6. Système d'injection de carburant selon la revendication 5,
    caractérisé en ce que
    l'installation de collecteur (16, 25) comporte une installation de mesure de niveau de liquide (17) qui fournit un signal de commande lorsqu'on atteint un certain niveau de liquide pour commander une installation d'affichage (19) ou une installation de commande (9).
  7. Système d'injection de carburant selon l'une des revendications précédentes comportant une pompe de transfert à haute pression (3) entraínée par un moteur (26) qui transfère du carburant dans un réservoir à haute pression de carburant (6), pour alimenter au moins un injecteur de carburant (12) à commande électrique par une installation de commande (9) par l'intermédiaire d'une conduite de pression (14),
    caractérisé en ce qu'
    une installation (18) de détection de certains états de fonctionnement ou de fonctionnement défectueux du système d'injection de carburant comme une fuite des parties à haute pression du système d'injection de carburant ou un fonctionnement défectueux du moteur à combustion interne, peut commuter un embrayage (27) à commutation électrique entre la pompe de transfert à haute pression et le moteur (26), pour couper le moteur (26) de la pompe de transfert à haute pression (3).
EP96914980A 1995-09-14 1996-04-24 Systeme d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0792413B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19534050A DE19534050A1 (de) 1995-09-14 1995-09-14 Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE19534050 1995-09-14
PCT/EP1996/001700 WO1997010431A1 (fr) 1995-09-14 1996-04-24 Systeme d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0792413A1 EP0792413A1 (fr) 1997-09-03
EP0792413B1 true EP0792413B1 (fr) 2001-11-21

Family

ID=7772136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96914980A Expired - Lifetime EP0792413B1 (fr) 1995-09-14 1996-04-24 Systeme d'injection de carburant pour moteurs a combustion interne

Country Status (7)

Country Link
US (1) US6079391A (fr)
EP (1) EP0792413B1 (fr)
JP (1) JPH10509229A (fr)
KR (1) KR970707381A (fr)
DE (2) DE19534050A1 (fr)
ES (1) ES2168473T3 (fr)
WO (1) WO1997010431A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748420A1 (de) * 1997-11-03 1999-05-06 Bosch Gmbh Robert Verfahren zum Betrieb einer selbstzündenden, luftverdichtenden Brennkraftmaschine
DE19750298A1 (de) * 1997-11-13 1999-05-20 Man Nutzfahrzeuge Ag Brennkraftmaschine mit Hochdruckeinspritzsystem
DE19822164A1 (de) * 1998-05-16 1999-11-18 Audi Ag Kraftstoffversorgungssystem für eine Brennkraftmaschine
US6499466B2 (en) * 2000-10-25 2002-12-31 Siemens Vdo Automotive Inc. Double walled fuel rail
DE10245389A1 (de) * 2002-09-28 2004-04-08 Daimlerchrysler Ag Dichtheitsprüfung eines Common-rail-Einspritzsystems
DE102005001758A1 (de) * 2005-01-14 2006-07-20 Daimlerchrysler Ag Unter hydraulischem Druck stehende Einrichtung mit leckagegesteuertem Zulauf
KR100706554B1 (ko) * 2005-12-17 2007-04-13 현대자동차주식회사 하이브리드 전기 자동차의 리크 진단장치 및 방법
DE202015102888U1 (de) * 2015-06-03 2016-09-12 Hörnlein Umformtechnik GmbH Kraftstoffverteilerrohr sowie Kraftfahrzeugbauteil
CN106224227B (zh) * 2016-08-31 2018-10-23 高松标 一种输油泵机械密封泄露报警系统

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1426102A1 (de) * 1962-04-25 1968-12-12 Daimler Benz Ag Ausbildung des Zylinderkopfes und der Zylinderkopfhaube von Einspritzbrennkraftmaschinen
DE1808228A1 (de) * 1968-11-11 1970-07-16 Guido Kg Maschf Rohrleitung,insbesondere Einspritzleitung fuer Brennkraftmaschinen
FR2133287A5 (fr) * 1971-04-15 1972-11-24 Semt
SU900045A1 (ru) * 1973-09-11 1982-01-23 Предприятие П/Я В-8735 Устройство дл сбора утечек топлива из форсунки двигател внутреннего сгорани
US4209041A (en) * 1976-07-21 1980-06-24 Loukonen Ernest W Fluid pressure responsive accessory equipment
US4149568A (en) * 1977-12-07 1979-04-17 Caterpillar Tractor Co. Double walled fuel line
US4675221A (en) * 1978-03-08 1987-06-23 Titeflex Corporation Fire sleeve for hose
DE3018781C2 (de) * 1980-05-16 1984-10-11 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Thermisch isoliertes Leitungsrohr
DE3733984A1 (de) * 1987-10-08 1989-06-01 Audi Ag Kraftstoff-einspritzleitungssystem fuer brennkraftmaschinen
US5002030A (en) * 1988-09-29 1991-03-26 Siemens-Bendix Automotive Electronics L.P. Fuel rail assemblies for internal combustion engines
US5129428A (en) * 1989-09-11 1992-07-14 Dayco Products, Inc. Flexible hose constuction
US5179922A (en) * 1990-11-15 1993-01-19 Proprietary Technology, Inc. Apparatus for determining change of fuel flow
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US5622210A (en) * 1995-06-12 1997-04-22 Lsp Products Group, Inc. Flexible hose with composite core

Also Published As

Publication number Publication date
WO1997010431A1 (fr) 1997-03-20
EP0792413A1 (fr) 1997-09-03
JPH10509229A (ja) 1998-09-08
DE19534050A1 (de) 1997-03-20
ES2168473T3 (es) 2002-06-16
DE59608260D1 (de) 2002-01-03
US6079391A (en) 2000-06-27
KR970707381A (ko) 1997-12-01

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