EP1595074B1 - Systeme d'injection de carburant pour moteur a combustion interne - Google Patents

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

Info

Publication number
EP1595074B1
EP1595074B1 EP03770908A EP03770908A EP1595074B1 EP 1595074 B1 EP1595074 B1 EP 1595074B1 EP 03770908 A EP03770908 A EP 03770908A EP 03770908 A EP03770908 A EP 03770908A EP 1595074 B1 EP1595074 B1 EP 1595074B1
Authority
EP
European Patent Office
Prior art keywords
pressure
piston
fuel
fuel injection
connection
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
EP03770908A
Other languages
German (de)
English (en)
Other versions
EP1595074A1 (fr
Inventor
Hans-Christoph Magel
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 EP1595074A1 publication Critical patent/EP1595074A1/fr
Application granted granted Critical
Publication of EP1595074B1 publication Critical patent/EP1595074B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is known from DE 101 32 732 A.
  • This fuel injection device has a high-pressure fuel pump and a fuel injection valve connected thereto for each cylinder of the internal combustion engine.
  • the high-pressure fuel pump has a pump piston driven in a stroke movement, which limits a pump working space.
  • the pump working space can be connected to a low-pressure region via a connection controlled by a first electrically actuated control valve.
  • the fuel injection valve has an injection valve member, is controlled by the at least one injection port and which is acted upon by the pressure prevailing in a pressure chamber connected to the pump chamber pressure in an opening direction. An opening and closing movement of the injection valve member is controlled by an electric control.
  • the fuel injection valve in this case has a control pressure chamber which can be connected to the pump working chamber and which can be connected to a discharge region via a connection controlled by the control designed as a second electrically actuated control valve.
  • an accumulator is fed into the fuel by the high-pressure fuel pump and which is connected to the pressure chamber of the fuel injection valve. Out The pressure accumulator fuel can be removed to an injection regardless of the promotion by the high-pressure fuel pump.
  • a post-injection of fuel under high pressure is possible in particular, which can take place at a time when fuel is no longer conveyed by the high-pressure fuel pump.
  • Such a post-injection of fuel is advantageous in order to reduce the pollutant emissions of the internal combustion engine, in particular the soot emission.
  • the pressure chamber opening toward the check valve are arranged.
  • a filling of the pressure accumulator with fuel takes place only via the throttle point, which must be sufficiently large to allow sufficient even at low pressure generated by the high-pressure fuel pump and at low injected fuel amount sufficient filling of the pressure accumulator.
  • a high pressure in the pressure space must be maintained in order to promote a large amount of fuel in the pressure accumulator, which a high driving work of the high-pressure fuel pump is required, resulting in a poor efficiency of the fuel injector.
  • the check valve In order to be able to reliably seal the high pressure differences between the accumulator and the relieved pressure chamber and pump working space, the check valve must be elaborately formed.
  • the fuel injection device according to the invention with the features according to claim 1 has the advantage over that the coupling device with the piston allows a simply constructed connection of the pressure accumulator to the pressure chamber and the pump working space and does not require a sealing seat.
  • the piston performs a directed toward the pressure chamber discharge stroke.
  • the bypass connection is formed in a simple manner.
  • the bypass connection can be formed with a small flow cross-section, since a filling of the pressure accumulator is additionally carried out by the stroke of the piston of the coupling device.
  • the development according to claim 6 ensures that the piston assumes a defined starting position, starting from which the piston performs a stroke for fuel delivery in the pressure accumulator or a delivery stroke to the pressure chamber.
  • the embodiment according to claim 7 also ensures that the piston assumes a defined initial position, starting from which the piston executes a delivery stroke to the pressure chamber, wherein a filling of the pressure accumulator takes place only through the bypass connection.
  • FIG. 1 shows a fuel injection device for an internal combustion engine in a schematic representation according to a first embodiment
  • Figure 2 shows the fuel injector fragmentary according to a second embodiment
  • Figure 3 the Fuel injection device in sections according to a third embodiment.
  • FIGS. 1 to 3 show a fuel injection device for an internal combustion engine of a motor vehicle.
  • the fuel injection device has a high-pressure fuel pump 10 and a fuel injection valve 12 connected thereto for each cylinder of the internal combustion engine.
  • the high-pressure fuel pump 10 and the fuel injection valve 12 may be combined into a single unit and form a so-called pump nozzle unit.
  • the high-pressure fuel pump 10 and the fuel injection valve 12 may be arranged separately from each other and connected to each other via a line and form a so-called pump-line-nozzle unit.
  • the high-pressure fuel pump 10 has a tightly guided in a cylinder bore 16 of a pump body 14 pump piston 18 which is driven by a cam 20 of a camshaft of the internal combustion engine against the force of a return spring 19 in a lifting movement.
  • the pump piston 18 defines in the cylinder bore 16 a pump working chamber 22 in which fuel is compressed by the pump piston 18 under high pressure.
  • the pump working chamber 22 is supplied via a connection 21 fuel from a fuel tank 24, for example by means of a feed pump 25.
  • a first electrically operated control valve 60 is arranged in the connection 21 of the pump working chamber 22 with the feed pump 25, a first electrically operated control valve 60 is arranged.
  • the control valve 60 is designed as a 2/2-way valve and is controlled by an electronic control device 62.
  • the control valve 60 has an actuator 61, which may be an electromagnet or a piezoelectric actuator.
  • the fuel injection valve 12 has a valve body 26 which may be formed in several parts, and in which a piston-shaped injection valve member 28 is guided in a bore 30 so as to be longitudinally displaceable.
  • the valve body 26 At its end region facing the combustion chamber of the cylinder of the internal combustion engine, the valve body 26 has at least one, preferably a plurality of injection openings 32.
  • the injection valve member 28 has, at its end region facing the combustion chamber, an approximately conical sealing surface 34, for example, which cooperates with a valve seat 36 formed in the valve body 26, from or after which the injection openings 32 are discharged.
  • annular space 38 is present between the injection valve member 28 and the bore 30 to the valve seat 36, which passes through a radial extension of the bore 30 into a pressure chamber 40 surrounding the injection valve member 28.
  • the injection valve member 28 has a pressure shoulder 42 in the region of the pressure chamber 40.
  • a prestressed closing spring 44 At the end remote from the combustion chamber of the injection valve member 28 engages a prestressed closing spring 44, through which the injection valve member 28 is pressed to the valve seat 36.
  • the closing spring 44 is arranged in a spring chamber 46 of the valve body 26, which adjoins the bore 30.
  • the spring chamber 46 is connected to a discharge region, which may be, for example, a return to the fuel tank 24.
  • a control piston 50 is guided tightly, which is connected to the injection valve member 28.
  • the control piston 50 defines with its end face remote from the spring chamber 46 a control pressure chamber 52 in the valve body 26.
  • connection 13 which discharges between the pump working chamber 22 and the first control valve 60, a non-return valve 53 opening to the pressure chamber 40 is arranged.
  • the check valve 53 allows fuel delivery from the high-pressure fuel pump 10 in the pressure chamber 40, but prevents with open first control valve 60, a backflow of fuel from the pressure chamber 40 in the pump chamber 22 or the feed pump 25.
  • From the connection 13 leads upstream of the pressure chamber 40 a Connection 54 in the control pressure chamber 52, wherein in the connection 54, a throttle point 55 is arranged.
  • From the control pressure chamber 52 also performs a connection 57 to a discharge area, such as a return. to the fuel tank 24, in which a throttle body 58 is arranged.
  • a second electrically actuated control valve 64 is arranged, which is designed as a 2/2-way valve and is controlled by the control device 62.
  • the second control valve 64 has an actuator 65, which may be an electromagnet or a piezoelectric actuator.
  • the injection valve member 28 When the second control valve 64 is closed, the injection valve member 28 remains in its closed position or is moved into its closed position as a result of the high pressure in the control pressure chamber 52. When the second control valve 64 is open, the injection valve member 28 may be due to the small Move pressure in the control pressure chamber 52 in its open position when the pressure in the pressure chamber 40 is sufficiently high.
  • this can also be done for example by a piezoelectric actuator which acts directly or indirectly on the injection valve member 28 in its closing direction.
  • the control pressure chamber 52 and the second control valve 64 can then be omitted.
  • connection 13 Of the connection 13 between the pump working chamber 22 and the pressure chamber 40 and the control pressure chamber 52 performs downstream of the check valve 53, a connection 66 to a pressure accumulator 68 from.
  • a coupling device 70 is arranged, which is shown in Figure 1 according to a first embodiment.
  • the coupling device 70 has a piston 74 displaceably guided in a cylinder bore 72.
  • the coupling device 70 has a bypass connection between the two end faces of the piston 74, which may be formed, for example, as a passage 76 extending through the piston 74.
  • a throttle 77 is arranged in the channel 76.
  • bypass connection can also be formed, as in a second exemplary embodiment described below, by means of an annular gap 176 with a small cross-section present between the outer jacket of the piston 174 and the cylinder bore 172.
  • the piston 74 is acted upon by the pressure prevailing in the pressure accumulator 68 pressure on its side facing the pressure accumulator 68 end face and applied on its side facing away from the accumulator 68 end face of the pressure prevailing in the connection 13 pressure.
  • the piston 74 is displaceable in the cylinder bore 72 between an end position directed towards the pressure accumulator 68 and an end position directed away from the pressure accumulator 68 toward the connection 13. It is preferably one common accumulator 68 provided for all cylinders of the internal combustion engine.
  • the pressure accumulator 68 may be formed, for example, as a separate component tubular or spherical. Alternatively, the pressure accumulator may also be formed by the internal volume of the fuel injection device or by the volume in connection lines of the fuel injection device.
  • a pressure limiting device 69 may be provided, by which the pressure prevailing in the accumulator 68 pressure is limited to a predetermined value.
  • the pressure limiting device 69 may be formed as a pressure limiting valve, which limits the pressure in the pressure accumulator 68 to a constant value.
  • the pressure limiting device 69 may also be designed as a control valve, by which the pressure prevailing in the pressure accumulator 68 pressure can be variably limited, for example, depending on operating parameters of the internal combustion engine and which is controlled by the control device 62.
  • the first control valve 60 is opened so that fuel is conveyed from the fuel reservoir 24 via the connection 21 into the pump working chamber 22 by the feed pump 25.
  • the check valve 53 is closed, since the pressure generated by the feed pump 25 is less than the pressure in the connection 13 downstream to the check valve 53 in the pressure chamber 40 and the control pressure chamber 52 prevailing pressure.
  • the first control valve 60 is closed, so that builds up in the pump working chamber 22 high pressure.
  • the check valve 53 opens When the second control valve 64 is closed, at least approximately the same pressure prevails in the control pressure chamber 52 as in the pressure chamber 40 and the injection valve member 28 is held in its closed position in which it rests with its sealing surface 34 on the valve seat 36 and the at least one injection port 32 closes, so that no fuel injection can take place.
  • the second control valve 64 is opened by the latter, so that the control pressure chamber 52 is connected to the discharge region and the pressure in the control pressure chamber 52 decreases.
  • the force acting in the closing direction on the injection valve member 28 is reduced, so that it is moved by the pressure prevailing in the pressure chamber 40 pressure in the opening direction 29 and the at least one injection port 32 releases, is injected by the fuel. It can be provided that initially only a small amount of fuel is injected at a pilot injection, in which case the second control valve 64 is closed again by the control device 62 after a short time, so that the pressure in the control pressure chamber 52 increases and the injection valve member 28 moves to its closed position becomes. It can also be provided several consecutive pilot injections.
  • the second control valve 64 is opened again by the control device 62 for a time corresponding to the amount of fuel to be injected.
  • the second control valve 64 is closed by the control device 62 and the first control valve 60 is opened.
  • the pump working chamber 22 is relieved by the open connection 21 to the feed pump 25, so that no further fuel delivery through the High-pressure fuel pump 10 is carried out.
  • the pressure drop in the pump working chamber 22 closes the check valve 53 in the connection 13.
  • the second control valve 64 is closed by the control device 62.
  • fuel is also conveyed through the passage 76 in the piston 74 into the accumulator 68, the flow through the passage 76 being limited by the restriction 77.
  • an increased pressure is maintained in the pressure chamber 40, in the control pressure chamber 52 and in the connection 13 downstream of the check valve 53, which also leads through the channel 76 in the piston 74 to a filling of the pressure accumulator 68.
  • the second control valve 64 is opened by the control device 62, so that the control pressure chamber 52 is relieved. From the accumulator 68 then flows under the pressure prevailing in the pressure accumulator 68 pressure fuel into the pressure chamber 40 and allows an opening of the injection valve member 28 and with it a fuel injection.
  • the piston 74 of the coupling device 70 performs a directed away from the accumulator 68 delivery stroke and displaces fuel from the cylinder bore 72 into the pressure chamber 40.
  • the pressure accumulator 68 and the coupling device 70 thus enable fuel injection, in particular a post-injection, regardless of the fuel delivery through the High-pressure fuel pump 10.
  • a post-injection is advantageous in order to reduce the pollutant emission, in particular the soot emission of the internal combustion engine and allows a regeneration of exhaust aftertreatment devices such as particle filter or catalyst.
  • An injection cycle includes at least one pre-injection, one main injection, and at least one post-injection.
  • the piston 74 of the coupling device 70 is then as indicated above in a direction away from the accumulator 68 position and moves in the fuel delivery through the high-pressure fuel pump 10 in its directed to the pressure accumulator 68 end position.
  • the fuel injector is shown in fragmentary accordance with a second embodiment, in which the basic structure is the same as in the first embodiment and only the coupling device 170 is modified.
  • the coupling device 170 has the cylinder bore 172, in which the piston 174 is guided displaceably.
  • the bypass connection is formed by an existing between the outer surface of the piston 174 and the cylinder bore 172 annular gap 176 with a small cross section, which also forms a throttle point.
  • the bypass connection may be the same as in the first embodiment as extending through the piston 174 Channel be formed with a Drosselbericht.
  • the piston 174 In this end position, the piston 174 remains until a fuel is removed from the pressure accumulator 68 to a post injection of fuel, in which the piston 174 is moved beyond its center position to its end directed away from the pressure accumulator 68 end position. After completion of the post-injection and thus after an injection cycle, the piston 174 is caused by the springs 178,180 moves back to its center position. At the beginning of the fuel delivery by the high-pressure fuel pump 10 in the next injection cycle, the piston 174 is thus always in its defined center position as the starting position.
  • the other function of the fuel injection device according to the second embodiment is the same as in the first embodiment.
  • FIG. 3 shows the fuel injection device according to a third exemplary embodiment, in which only the coupling device 270 is modified compared to the first exemplary embodiment.
  • the Coupling device 270 has the cylinder bore 272, in which the piston 274 is guided displaceably.
  • the piston 274 has the bypass channel 276 with the throttle point 277.
  • the bypass connection can also be formed as in the second embodiment by an annular gap between the piston 274 and cylinder bore 272.
  • the piston 274 is thus always in its defined, directed to the pressure accumulator 68 end position as the starting position.
  • the other function of the fuel injection device according to the second embodiment is the same as in the first embodiment.

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)

Claims (9)

  1. Installation d'injection de carburant pour un moteur à combustion interne, comprenant une pompe à carburant à haute pression (10) et un injecteur de carburant (12) relié à celle-ci pour chaque cylindre du moteur à combustion interne,
    la pompe à carburant à haute pression (10) présentant un piston de pompe (18) entraîné dans un mouvement linéaire et délimitant une chambre de travail de pompe (22) qui peut être reliée à une zone de basse pression (25) par une jonction (21) commandée par une soupape de commande électrique (60),
    l'injecteur de carburant (12) présentant un organe de soupape (28) qui commande au moins un orifice d'injection (32) et qui est sollicité dans une direction d'ouverture (29) par la pression régnant dans une chambre de pression (40) pouvant être reliée à la chambre de travail de pompe (22),
    un mouvement d'ouverture et de fermeture de l'organe de soupape (28) étant commandé par un élément de commande électrique (64),
    avec un accumulateur de pression (68) relié à la chambre de travail de pompe (22) par une jonction (66) refoulant du carburant dans l'accumulateur de pression (68) pendant la course de refoulement du piston de pompe (18), et également relié à la chambre de pression (40) de l'injecteur de carburant (12) par la jonction (66) amenant du carburant de l'accumulateur de pression (68) dans la chambre de pression (40) pour une injection de carburant par l'intermédiaire de l'injecteur de carburant (12) indépendamment de la course de refoulement du piston de pompe (18),
    caractérisée en ce que
    dans la jonction (66) de l'accumulateur de pression (68) avec la chambre de travail de pompe (22) et la chambre de pression (40), un dispositif de couplage (70 ; 170 ; 270) présente un piston mobile (74 ; 174 ; 274) sollicité d'une part par la pression régnant dans l'accumulateur de pression (68) et d'autre part par la pression régnant dans la jonction (66),
    le piston (74 ; 174 ; 274) exécute une course de refoulement en direction de la chambre de pression (40) pour une injection de carburant, et
    une jonction de dérivation (76, 77; 176 ; 276, 277) prévue dans le dispositif de couplage (70 ; 170; 270) relie la jonction (66) à l'accumulateur de pression (68).
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la jonction de dérivation est formée par un canal (76 ; 176 ; 276) qui traverse le piston (74 ; 174 ; 274) et loge un point d'étranglement (77 ; 177 ; 277).
  3. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la jonction de dérivation est formée par un canal (176) aménagé entre l'enveloppe extérieure du piston (174) et un alésage cylindrique (172) qui guide le piston (174).
  4. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que
    le piston (74 ; 174) exécute une course orientée vers l'accumulateur de pression (68) pour remplir l'accumulateur de pression (68).
  5. Installation d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    le piston (74 ; 174 ; 274) est mobile entre une position terminale définie orientée vers l'accumulateur de pression (68) et une position terminale définie orientée vers la jonction (66).
  6. Installation d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    le piston (174 ; 274) est sollicité par au moins un ressort (178, 180 ; 280) en direction d'au moins une position terminale.
  7. Installation d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    le piston (174) est sollicité par un ressort (178, 180) en direction de chaque position terminale, et le piston (174) est maintenu par les ressorts (178, 180) entre deux cycles d'injection successifs dans une position intermédiaire définie entre les deux positions terminales.
  8. Installation d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    le piston (274) est maintenu par un ressort (280) dans sa position terminale orientée vers l'accumulateur de pression (68) entre deux cycles d'injection successifs.
  9. Installation d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce qu'
    un dispositif de limitation de pression (69) est prévu pour maintenir la pression dans l'accumulateur de pression (68) à une valeur prédéfinie.
EP03770908A 2003-01-15 2003-10-07 Systeme d'injection de carburant pour moteur a combustion interne Expired - Lifetime EP1595074B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10301194A DE10301194A1 (de) 2003-01-15 2003-01-15 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10301194 2003-01-15
PCT/DE2003/003323 WO2004070201A1 (fr) 2003-01-15 2003-10-07 Systeme d'injection de carburant pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1595074A1 EP1595074A1 (fr) 2005-11-16
EP1595074B1 true EP1595074B1 (fr) 2006-10-04

Family

ID=32602542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03770908A Expired - Lifetime EP1595074B1 (fr) 2003-01-15 2003-10-07 Systeme d'injection de carburant pour moteur a combustion interne

Country Status (4)

Country Link
US (1) US7252070B2 (fr)
EP (1) EP1595074B1 (fr)
DE (2) DE10301194A1 (fr)
WO (1) WO2004070201A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7451743B2 (en) * 2003-03-04 2008-11-18 Robert Bosch Gmbh Fuel injection system with accumulator fill valve assembly
US7845162B2 (en) * 2005-06-20 2010-12-07 Cummins Filtration Ip, Inc Apparatus, system, and method for diverting fluid
GB0614537D0 (en) * 2006-07-21 2006-08-30 Delphi Tech Inc Fuel Injection System
US7947112B1 (en) * 2007-07-16 2011-05-24 Rheodyne, Llc Method for degassing a fluid
WO2009151442A1 (fr) * 2008-06-09 2009-12-17 Cummins Filtration Ip Inc Appareil, système et procédé de déviation de fluide
US20100031930A1 (en) * 2008-08-06 2010-02-11 Caterpillar Inc. Fuel system for selectively providing fuel to an engine and a regeneration system
US7970526B2 (en) * 2009-01-05 2011-06-28 Caterpillar Inc. Intensifier quill for fuel injector and fuel system using same
US8312863B2 (en) * 2010-03-11 2012-11-20 Caterpillar Inc. Fuel delivery system for selectively providing fuel to various engine components
RU2531163C2 (ru) * 2013-07-15 2014-10-20 Погуляев Юрий Дмитриевич Способ управления подачей топлива и устройство управления подачей топлива
US11220980B2 (en) * 2019-05-16 2022-01-11 Caterpillar Inc. Fuel system having isolation valves between fuel injectors and common drain conduit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045347B (en) * 1979-02-24 1983-04-20 Huber Motorenbau Inst I c engine fuel injection system
DE4335171C1 (de) * 1993-10-15 1995-05-04 Daimler Benz Ag Kraftstoffeinspritzanlage für eine mehrzylindrige Dieselbrennkraftmaschine
DE19651671C2 (de) * 1996-12-12 2001-10-04 Daimler Chrysler Ag Steuerung einer Einspritzanlage für eine mehrzylindrige Brennkraftmaschine
DE19747092B4 (de) * 1997-10-24 2005-01-13 Siemens Ag Durchflußbegrenzungsvorrichtung für Brennkraftmaschinen
EP1008741B1 (fr) * 1998-11-20 2003-04-02 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Système d'injection de combustible du type à accumulateur
DE19860476A1 (de) * 1998-12-28 2000-07-06 Bosch Gmbh Robert Kraftstoffeinspritzanlage
US6494182B1 (en) * 1999-02-17 2002-12-17 Stanadyne Automotive Corp. Self-regulating gasoline direct injection system
DE19939418A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE10132732A1 (de) * 2001-07-05 2003-01-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
JP4305394B2 (ja) * 2005-01-25 2009-07-29 株式会社デンソー 内燃機関用燃料噴射装置

Also Published As

Publication number Publication date
EP1595074A1 (fr) 2005-11-16
US7252070B2 (en) 2007-08-07
WO2004070201A1 (fr) 2004-08-19
US20060231076A1 (en) 2006-10-19
DE10301194A1 (de) 2004-07-29
DE50305309D1 (de) 2006-11-16

Similar Documents

Publication Publication Date Title
DE19832287A1 (de) Nadelgesteuerte Kraftstoffinjektoreinheit
EP1458970B1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
EP1595074B1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1490592A1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1530681B1 (fr) Dispositif d'injection de carburant d'une machine a combustion interne
DE10205185A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1312792B1 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
EP1310668B1 (fr) Système d'injection de carburant pour un moteur à combustion
EP1310667B1 (fr) Système d'injection de carburant pour un moteur à combustion
DE10123995A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1318293B1 (fr) Système d'injection de carburant pour moteur à combustion interne
DE10207045A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10205749A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10160263A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1260702A2 (fr) Système d'injection de carburant d'un moteur à combustion interne
EP1203882A2 (fr) Injecteur
EP1552138B1 (fr) Systeme d'injection de carburant destine a un moteur a combustion interne
EP1434939A1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
DE10205750A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10224694A1 (de) Brennkraftmaschine
DE10139545A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1525389A1 (fr) Systeme d'injection de carburant pour moteur a combustion
WO2006018334A1 (fr) Dispositif d'injection de carburant pour un cylindre d'un moteur a combustion interne
DE102004046898A1 (de) Kraftstoffeinspritzeinrichtung
WO2003027481A1 (fr) Dispositif d'injection de carburant pour un moteur a combustion interne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050816

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50305309

Country of ref document: DE

Date of ref document: 20061116

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070108

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070705

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20091110

Year of fee payment: 7

Ref country code: GB

Payment date: 20091023

Year of fee payment: 7

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20101007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101102

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101007

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131217

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50305309

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150501