EP1339977B1 - 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
EP1339977B1
EP1339977B1 EP01997639A EP01997639A EP1339977B1 EP 1339977 B1 EP1339977 B1 EP 1339977B1 EP 01997639 A EP01997639 A EP 01997639A EP 01997639 A EP01997639 A EP 01997639A EP 1339977 B1 EP1339977 B1 EP 1339977B1
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EP
European Patent Office
Prior art keywords
pressure
valve
fuel
low
space
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Expired - Lifetime
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EP01997639A
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German (de)
English (en)
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EP1339977A1 (fr
Inventor
Detlev Potz
Thomas Kuegler
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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
    • 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
    • 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
    • F02M45/04—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 with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the invention relates to a fuel injection system for Internal combustion engines, as disclosed in the published patent EP 0 740 067 and DE 41 15 477 A1 is known.
  • a fuel injector comprising, which has a valve body.
  • the Valve body in which a hollow needle is guided.
  • the hollow needle has a pressure shoulder on and is at the level of the pressure shoulder of one by one surrounded radial extension of the bore formed pressure chamber which is connected to a high-pressure fuel source.
  • the hollow needle has at its combustion chamber end one Sealing surface on at the combustion chamber end of the Bore formed valve seat is applied.
  • the hollow needle will from a spring in the direction of the valve seat with a Closing force applied and remains so in a depressurized state in the pressure chamber in the closed position, in which they have a first row of injection ports formed in the valve seat is, covered.
  • an inner needle led which also at its combustion chamber end one Has sealing surface and rests against the valve seat.
  • the inner needle This is also by a spring in the direction of pressed the valve seat and remains so if no injection of fuel is to be in contact with the valve seat and thus closes a second row of injection openings, which are also formed on the valve seat and the downstream of the first row of injection ports are arranged.
  • the inner needle goes to her brennraumabgewandten End in a piston rod over which the inner needle connects in the axial direction with a piston, the one Control room limited, in the way that by a corresponding Pressure in the control room a force on the piston and so that the piston rod also on the inner needle in Closing direction can be generated.
  • About an adjusting device can the fuel pressure in the case of an injection is directed into the pressure chamber, also in the control room are passed, so that there is a high fuel pressure. If this is the case, then the inner needle with a acted upon high force in the closed position, so that the fuel pressure in the pressure chamber only the hollow needle through the Force on the pressure surface against the closing force in the opening direction is moved and the first row of injection ports releases.
  • the fuel injection system according to the invention with the characterizing Features of claim 1 has in contrast the advantage that the low pressure accumulation chamber by the fuel pressure fueled in the fuel injector becomes.
  • This is between the high-pressure accumulator, the supplies the fuel with injection pressure, the fuel injection valve and the low pressure accumulator a high pressure valve arranged, which is designed as a 3/2-way valve.
  • the high pressure valve connects the formed in the valve body pressure chamber with the low-pressure accumulation chamber, while the connection to the high pressure collection room is interrupted.
  • the high-pressure accumulation chamber is connected to the pressure chamber of the Fuel injector connected while the connection is interrupted to the low pressure accumulator.
  • the high pressure valve is located in his second position. Should the injection be stopped, then the high pressure valve, and the Relief of the high pressure fuel in the Pressure chamber takes place in the low-pressure accumulation chamber. hereby is there a fuel pressure built up, the means of a Pressure holding valve maintained at a predetermined level becomes. In this way, a given fuel pressure level be kept in the low-pressure accumulator, without a separate pressure source would be required, for example in the form of an additional fuel pump.
  • the invention can via a control valve, the pressure of Be given in the control room or low pressure collection room it can relieve the control room in a fuel tank become. Due to the relatively low pressure in the low-pressure collecting space can the control valve with which the control room is controlled will be designed as a low pressure valve, which far less expensive than a control valve for very high Fuel pressures. Likewise, it is sufficient if all Lines from the low-pressure accumulator only on this low pressure are designed. Likewise, the control room and the piston guided therein correspondingly less expensive be made.
  • the invention is in the drain line through which the Low pressure valve is connected to the control room, a Pressure holding valve arranged.
  • This way always stays a certain fuel pressure, which is lower than the pressure in the low pressure accumulator, obtained in the control room.
  • This residual pressure in the control chamber can be used as a so-called oil spring Serve that always has the hydraulic force on the piston exerts a closing force on the corresponding valve needle. It can thus be dispensed with a closing spring, the is usually needed, the valve needle with the Piston is connected, always act on a closing force.
  • FIG. 1 shows a fuel injection system for internal combustion engines schematically illustrated, wherein a fuel injection valve 15 is shown in longitudinal section and the rest Components of the fuel injection system in schematic Presentation.
  • a fuel injection valve 15 is shown in longitudinal section and the rest Components of the fuel injection system in schematic Presentation.
  • From a fuel tank 1 is connected via a Fuel line 3 fuel a high-pressure pump 5 fed and from this on the fuel line 3 on one High-pressure accumulator 7 fed.
  • control device is ensured that in the high-pressure accumulator 7 always a predetermined high fuel pressure level is maintained.
  • High-pressure accumulator 7 lead high-pressure lines 9, the each connectable to a fuel injection valve 15 are.
  • the high pressure line 9 is with a high pressure valve 11 connected as a 3/2-way valve is executed.
  • Das Fuel injection valve 15 has a housing 16 which from a valve holding body 17, an intermediate disc 20 and a valve body 22, wherein the valve body 22 under Intermediate layer of the washer 20 by means of a clamping nut 25 in the axial direction against the valve holding body 17th is tense.
  • a bore 30 is formed, in a valve needle in the form of a hollow needle 35th is guided longitudinally displaceable.
  • a valve seat 46 is formed, in which two in axially staggered rows of injection openings 41, 42 are formed.
  • FIG. 2 shows an enlarged view of Figure 1 in the area the valve seat 46.
  • the hollow needle 35 is in a combustion chamber facing away Section sealed in the bore 30 and tapers to the combustion chamber to form a Pressure shoulder 39, which serves as a pressure surface.
  • the hollow needle 35 goes into an outer sealing surface 45 over, which is formed substantially conically, so that at the transition of the outer circumferential surface of the hollow needle 35 for Sealing surface 45 an outer sealing edge 43 is formed, in the closed position of the hollow needle 35 rests against the valve seat 46.
  • a pressure chamber 32 in the valve body 22 formed, which, the hollow needle 35 surrounding until the Valve seat 46 continues.
  • the pressure chamber 32 is a in the Valve body 22, the washer 20 and the valve holding body 17 extending inlet channel 18 via the high pressure line 9 with the high-pressure accumulator 7 connectable.
  • the first Row of injection openings 41 in the valve seat 46 is arranged so that the sealing edge 43 of the hollow needle 35, the first Series of injection openings 41 seals against the pressure chamber 32, so that when planting the hollow needle 35 on the valve seat 46th no injection of fuel takes place.
  • the hollow needle 35 At its end facing away from the combustion chamber, the hollow needle 35 abuts a spring plate 50, in one in the washer 20 formed central opening 33 is arranged.
  • the central opening 33 in this case has the transition of the valve body 22 to the intermediate disc 20 has a smaller diameter on than the bore 30, so that at the intermediate disc 20 a Stop shoulder is formed, which serves as a stroke stop for the hollow needle 35 is used in the opening stroke.
  • a Stop shoulder is formed, which serves as a stroke stop for the hollow needle 35 is used in the opening stroke.
  • the Spring plate 33 protrudes into a valve holding body 17 trained spring chamber 52, in which a closing spring 55 under Compression bias is arranged.
  • the closing spring 55 hereby supports the combustion chamber facing away from a support ring 57 from and with its end facing the combustion chamber on the spring plate 50, so that by the bias of the closing spring 55 a Closing force on the hollow needle 35 in the direction of the valve seat 46 is exercised.
  • the spring chamber 52 has a Leakage oil connection 53, to which a drain line 65 connected is, so that the spring chamber 52 always with the fuel tank 1 connected and thus is depressurized.
  • a valve needle in the form of an inner needle 37 guided longitudinally displaceable, which at its combustion chamber facing End has a conical pressure surface 48, which is bounded by a sealing edge 44.
  • the inner needle 37 comes on her combustion chamber opposite end into a piston rod 61st over, through the spring plate 50 and the spring chamber 52 bis in a combustion chamber facing away from the spring chamber 52 in the valve holding body 17 trained control room 62 protrudes.
  • a piston 60 is slidably disposed, the sealing in the Control chamber 62 is guided and cup-shaped.
  • the piston 60 is connected to the piston rod 61 so that he moves synchronously with the inner needle 37 in the longitudinal direction.
  • a closing spring 64 is arranged, which has a compression bias and the inner needle 37 in addition to the hydraulic force passing through the control room 62 prevailing pressure is generated, in the closing direction applied.
  • the fuel injection system also has a Low-pressure accumulator 72 in which a predetermined fuel pressure level is maintained, clearly below the fuel pressure level of the high pressure accumulator 7 is located.
  • a predetermined fuel pressure level is maintained, clearly below the fuel pressure level of the high pressure accumulator 7 is located.
  • the low-pressure accumulation chamber 72 prevails Pressure of at most about one fifth of the pressure in the high-pressure collecting space 7, which can be more than 100 MPa.
  • Each high pressure valve 11 performs a Abêttechnisch 70 in the low pressure accumulator 72, so that the high pressure valve 11th as a 3/2-way valve, the high-pressure line 9 from the high-pressure collecting chamber 7, the high pressure line 9 to the fuel injection valve 15 and the diversion line 70 connects to each other or separates.
  • the high pressure valve 11 can in two Switched positions are driven.
  • the first position which is shown in Figure 1, connects the high pressure valve 11 from the pressure chamber 32 of the fuel injection valve 15 incoming high-pressure line 9 with the Abêttechnisch 70, while the connection to the high-pressure accumulator 7 closed becomes.
  • the second position of the high pressure valve eleventh is the high-pressure accumulation chamber 7 via the high pressure line. 9 connected to the pressure chamber 32 of the fuel injection valve 15, while the Abêt effet 70 is closed.
  • the first position of the high pressure valve 11 corresponds to the Position in which no fuel in the combustion chamber of the internal combustion engine to be injected while the second Position switched during fuel injection becomes.
  • the low-pressure accumulator 72 is connected via a drain line 76 connected to the fuel tank 1, wherein in the drain line 76, a pressure holding valve 74 is arranged so that in Low pressure accumulator 72 always a predetermined fuel pressure level is maintained.
  • a control line 80 From the low pressure storage room 72 leads a control line 80 to a low pressure valve 78, which is designed as a 3/2-way valve. After the low pressure valve 78 shares the control line 80 accordingly the number of fuel injection valves and flows into the Control chamber 62 of the respective fuel injection valve 15th
  • a drain line opens into the low-pressure valve 78 82, which is connected to the fuel tank 1.
  • the fuel injection system works as follows: In partial load operation the internal combustion engine is relatively little Fuel injected into the combustion chamber of the internal combustion engine. For a given injection pressure should therefore only one Part of the entire injection cross section are controlled.
  • the low-pressure valve 78 is in the second position drove, so that the low-pressure accumulator 72 with the control room 62 of all fuel injection valves 15 connected is such that a hydraulic force is exerted on the piston 60 is and the piston rod 61 and thus the inner needle 37th is pressed in the closed position.
  • the high pressure valve 11 is moved to the second position, so that the high-pressure accumulator 7 via the high-pressure line 9th and the inlet channel 18 is connected to the pressure chamber 32.
  • the first part of the injection follows as described above in partial load operation, however, now, after the Hollow needle 35 is moved in the open position, by pressurization the pressure surface 48 and the inner needle 37 in Opened position, so that the second row injection ports 42 are released and fuel from the Pressure chamber 32 injected through the entire injection cross-section becomes. In this operating mode acts on the inner needle 37 only the force of the closing spring 64, so that the hydraulic Pressure on the pressure surface 48 for an opening stroke now sufficient.
  • the end of the injection is like described above by the switching of the high pressure valve eleventh
  • FIG. 3 shows a further exemplary embodiment of the fuel injection system shown, with only a section here is shown in the region of the low pressure valve 78.
  • the Low pressure valve 78 operates in this embodiment as in the embodiment shown in Figure 1, however Here is a pressure holding valve 84 is arranged in the drain line 82.
  • the control room 62nd In the first position of the low pressure valve 78, which is shown in Figure 3, the control room 62nd not fully depressurized, but it remains Residual pressure exist, which determines the pressure holding valve 84 becomes.
  • this hydraulic residual pressure a force on the piston 60th exerts, which corresponds to the force of the closing spring 64, so that the closing spring 64 can be omitted.
  • a so-called oil spring is used.
  • the low-pressure accumulator 72 is exclusively on the Abêtstrom the fuel injection valves 15 with fuel supplied in sufficient pressure. Another fuel pressure source, in the form of an additional fuel pump, can thus be omitted. Because all fuel injectors 15 of the internal combustion engine with the low-pressure accumulator 72 are connected, the operating mode, ie Part-load or full-load operation, for all fuel injection valves 15 synchronously by appropriate switching of the Low pressure valve 78 determine.

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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)
  • Fuel-Injection Apparatus (AREA)

Claims (9)

  1. Système d'injection de carburant pour moteurs à combustion interne, comportant
    une chambre collectrice à haute pression (7) dans laquelle du carburant est maintenu sous pression élevée,
    au moins un injecteur de carburant (15) relié à la chambre collectrice haute pression (7) pour injecter le carburant sous haute pression, à travers des orifices d'injection (41, 42) qui forment une section transversale d'injection, dans une chambre de combustion du moteur à combustion interne ;
    une chambre de commande (62) limitée par un piston (60) pouvant se déplacer longitudinalement et reliée activement à l'injecteur de carburant (15), de sorte que la section transversale d'injection de l'injecteur (15) est commandée en fonction de la pression hydraulique régnant dans la chambre de commande (62),
    une chambre collectrice basse pression (72) pouvant être reliée à la chambre de commande (62) de manière à maintenir dans la chambre collectrice basse pression (72) une pression de carburant prédéterminée inférieure à celle régnant dans la chambre collectrice haute pression (7), et
    pour la commande des orifices d'injection (41, 42), au moins une aiguille de soupape (35 ; 37) dans un perçage (30) de l'injecteur (15) mobile longitudinalement, contre une force de fermeture, et présentant une surface de pression (39 ; 48) disposée dans une chambre de pression (32) pouvant être reliée à la chambre collectrice haute pression (7), de sorte que l'aiguille de soupape (35 ; 37) peut se déplacer longitudinalement, sous l'effet de la pression régnant dans la chambre de pression (32), en sens inverse de la force de fermeture, l'aiguille (35 ; 37) étant relié au piston (60),
    caractérisé en ce que
    la chambre collectrice haute pression (7), la chambre collectrice basse pression (72) et la chambre de pression (32) sont reliées à une soupape haute pression (11) de telle manière que, dans une première position de la soupape haute pression (11), la chambre collectrice haute pression (7) est reliée à la chambre de pression (32) alors que la liaison avec la chambre collectrice basse pression (72) est fermée, et que, dans une seconde position de la soupape à haute pression (11), la chambre collectrice basse pression (72) est reliée à la chambre de pression (32) alors que la liaison avec la chambre collectrice à haute pression (7) est fermée.
  2. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    plus d'un injecteur (15) est présent dans le système d'injection de carburant, et pour chaque injecteur (15) est présente une chambre de commande (62) reliée à la chambre collectrice basse pression (72).
  3. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    deux aiguilles de soupape (35 ; 37) sont disposées dans l'injecteur (15), et l'une de ces aiguilles a la forme d'une aiguille creuse (35) et l'autre celle d'une aiguille intérieure (37) guidée dans l'aiguille creuse (35), l'une de ces deux aiguilles de soupape (35 ; 37) étant reliées au piston (60).
  4. Système d'injection de carburant selon la revendication 3,
    caractérisé en ce que
    l'aiguille creuse (35) et l'aiguille intérieure (37) ne commandent chacune qu'une partie des orifices d'injection (41, 42).
  5. Système d'injection de carburant selon la revendication 3,
    caractérisé en ce qu'
    une aiguille de soupape (35 ; 37) est reliée au piston (60) par l'intermédiaire d'une tige de piston (61).
  6. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la chambre collectrice basse pression (72), un réservoir de carburant sans pression (1) et la chambre de commande (62) sont reliées entre elles au moyen d'une soupape basse pression (78), dans une première position de la soupape basse pression (78) le réservoir de carburant (1) est relié à la chambre de commande (62) alors que la liaison avec la chambre collectrice basse pression (72) est fermée, et dans une seconde position de la soupape basse pression (78) la chambre collectrice basse pression (72) est reliée à la chambre de commande (62) alors que la liaison avec le réservoir de carburant (1) est fermée.
  7. Système d'injection de carburant selon la revendication 6,
    caractérisé en ce que
    le réservoir de carburant (1) est relié à la soupape basse pression (78) par l'intermédiaire d'une conduite d'huile de fuite (82) dans laquelle est disposée une soupape de maintien de pression (84), de telle sorte que la pression de carburant régnant dans la chambre de commande (62), dans la première position de la soupape basse pression (78), ne dépasse pas une valeur prédéterminée.
  8. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la chambre collectrice basse pression (72) est reliée au réservoir de carburant (1) par l'intermédiaire d'une soupape de maintien de pression (74), de telle sorte qu'un niveau de pression prédéterminé n'est pas dépassé dans la chambre collectrice basse pression (72).
  9. Système d'injection de carburant selon la revendication 8,
    caractérisé en ce que
    la pression de carburant régnant dans la chambre collectrice basse pression (72) est toujours inférieure à environ un cinquième de la pression de carburant régnant dans la chambre collectrice haute pression (7).
EP01997639A 2000-11-22 2001-11-17 Systeme d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1339977B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10058130 2000-11-22
DE10058130A DE10058130A1 (de) 2000-11-22 2000-11-22 Kraftstoffeinspritzsystem für Brennkraftmaschinen
PCT/DE2001/004337 WO2002042637A1 (fr) 2000-11-22 2001-11-17 Systeme d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1339977A1 EP1339977A1 (fr) 2003-09-03
EP1339977B1 true EP1339977B1 (fr) 2005-03-23

Family

ID=7664367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01997639A Expired - Lifetime EP1339977B1 (fr) 2000-11-22 2001-11-17 Systeme d'injection de carburant pour moteurs a combustion interne

Country Status (8)

Country Link
US (1) US6925988B2 (fr)
EP (1) EP1339977B1 (fr)
JP (1) JP2004514826A (fr)
KR (1) KR20020069263A (fr)
CZ (1) CZ20022393A3 (fr)
DE (2) DE10058130A1 (fr)
PL (1) PL355416A1 (fr)
WO (1) WO2002042637A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10218219A1 (de) * 2002-04-24 2003-11-06 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE10246973A1 (de) 2002-10-09 2004-04-22 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
US7219655B2 (en) * 2003-02-28 2007-05-22 Caterpillar Inc Fuel injection system including two common rails for injecting fuel at two independently controlled pressures
DE10309078A1 (de) * 2003-03-03 2004-09-16 Robert Bosch Gmbh Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE10326506A1 (de) * 2003-06-12 2005-01-05 Robert Bosch Gmbh Vorrichtung zum Einspritzen von Kraftstoff mit hubstabilisiertem Einspritzventilglied
DE10336411A1 (de) * 2003-08-08 2005-03-03 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
DE10342567A1 (de) * 2003-09-15 2005-04-14 Robert Bosch Gmbh Vorrichtung zum Einspritzen von Kraftstoff
DE10349639A1 (de) * 2003-10-24 2005-05-19 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
TR200402048A1 (tr) * 2004-08-18 2006-03-21 Robert Bosch Gmbh Hidrolik kontrollü değişken kesitli enjektör memesi.
US20080047527A1 (en) * 2006-08-25 2008-02-28 Jinhui Sun Intensified common rail fuel injection system and method of operating an engine using same
KR101063688B1 (ko) 2008-12-03 2011-09-07 현대자동차주식회사 엔진의 연료 공급장치 및 이를 위한 인젝터
DE102013214965A1 (de) * 2013-07-31 2015-02-05 Robert Bosch Gmbh Brennstoffverteiler und Brennstoffeinspritzsystem
DE102013214960A1 (de) * 2013-07-31 2015-02-05 Robert Bosch Gmbh Brennstoffeinspritzsystem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4115477C2 (de) * 1990-05-17 2003-02-06 Avl Verbrennungskraft Messtech Einspritzdüse für eine Brennkraftmaschine
FR2673246B1 (fr) 1991-02-25 1994-01-28 Melchior Jean Dispositif d'injection de liquide, notamment de combustible, dans au moins une chambre pressurisee d'une machine a fonctionnement periodique tel que moteur a combustion interne et moteur de ce type equipe de ce dispositif.
DE4311627B4 (de) * 1993-04-08 2005-08-25 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
JPH08144896A (ja) * 1994-11-25 1996-06-04 Zexel Corp 可変噴孔型燃料噴射ノズル
US5732679A (en) * 1995-04-27 1998-03-31 Isuzu Motors Limited Accumulator-type fuel injection system
DE19780907C2 (de) * 1996-08-29 2003-02-06 Mitsubishi Motors Corp Kraftstoffeinspritzsystem
DE69906459T2 (de) * 1998-11-20 2003-10-23 Mitsubishi Motors Corp Kraftstoffeinspritzvorrichtung der Accumulatorgattung
DE19939418A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem für eine Brennkraftmaschine
US6457453B1 (en) * 2000-03-31 2002-10-01 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Accumulator fuel-injection apparatus

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DE10058130A1 (de) 2002-05-23
PL355416A1 (en) 2004-04-19
CZ20022393A3 (cs) 2003-12-17
WO2002042637A1 (fr) 2002-05-30
EP1339977A1 (fr) 2003-09-03
JP2004514826A (ja) 2004-05-20
DE50105731D1 (de) 2005-04-28
US6925988B2 (en) 2005-08-09
KR20020069263A (ko) 2002-08-29
US20030075154A1 (en) 2003-04-24

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