EP1384000B1 - Dispositif d'injection de carburant pour moteur a combustion - Google Patents

Dispositif d'injection de carburant pour moteur a combustion Download PDF

Info

Publication number
EP1384000B1
EP1384000B1 EP02737785A EP02737785A EP1384000B1 EP 1384000 B1 EP1384000 B1 EP 1384000B1 EP 02737785 A EP02737785 A EP 02737785A EP 02737785 A EP02737785 A EP 02737785A EP 1384000 B1 EP1384000 B1 EP 1384000B1
Authority
EP
European Patent Office
Prior art keywords
section
space
accumulator piston
accumulator
shank
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
EP02737785A
Other languages
German (de)
English (en)
Other versions
EP1384000A1 (fr
Inventor
Gérard Duplat
Raphael Pourret
Peter Voigt
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 EP1384000A1 publication Critical patent/EP1384000A1/fr
Application granted granted Critical
Publication of EP1384000B1 publication Critical patent/EP1384000B1/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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
    • 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
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats

Definitions

  • the invention is based on one Fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is by DE 39 00 763 A1 known.
  • This fuel injector has a high pressure fuel pump and Fuel injector for a cylinder of Internal combustion engine on.
  • the high-pressure fuel pump has one driven by the internal combustion engine, one Pump working space limiting pump piston, whereby by an electrically controlled valve connects the Pump work space is controlled with a relief space.
  • the fuel injection valve has an injection valve member on, controlled by the at least one injection opening and that through the one with the pump work room connected pressure chamber prevailing pressure against the force a closing spring arranged in a spring chamber in a Opening direction is movable.
  • the closing spring is supported on the one hand at least indirectly on the injection valve member and on the other hand, at least indirectly from a storage piston.
  • the accumulator piston is on its closing spring opposite side of the prevailing in the pump work room Pressurized and against the force of the closing spring in a lifting movement movable.
  • the piston is one Starting position at low pressure in the pressure chamber in the Storage space movable, the evasive stroke movement of the Storage piston in the storage space by a stop is limited.
  • the storage piston has one in one Connection hole between the storage space and the Spring chamber arranged and protruding into the spring chamber Shaft part on. With the evasive stroke movement of the Accumulator piston is powered by this fuel Storage space through a between the shaft part and the Connection hole existing gap in the spring chamber repressed. This will dampen the stroke movement of the Storage piston causes.
  • the damping of the movement of the Accumulator piston can move over the stroke of the accumulator piston be constant or such that the damping at the beginning of the Evasion stroke movement is strong and then decreases. It was found that the damping achieved here is not is sufficient so that the accumulator piston with high Speed hits the stop and thereby causes annoying noises.
  • the fuel injection device with the Features according to claim 1 has the advantage that through the formation of the shaft part that the in the Starting position of the accumulator piston in the Connecting bore arranged shaft section with smaller cross section and in the evasive stroke movement in the connecting portion immersing the shaft section has a larger cross section, at the beginning of Evasive stroke movement with a lower damping and with increasing evasive stroke movement a stronger damping of the Movement of the accumulator piston is present, so that this hits the stop only at low speed and no disturbing or only a little noise caused.
  • Training according to claim 3 enables in a simple manner Use a support element with the required strength an adjustment of the position of the shaft part to Accumulator piston.
  • the training according to claim 4 enables it by using balls with different Diameter, which as standardized components in different diameters available with fine gradation are adjusting the position of the shaft part.
  • the Training according to claim 5 allows that a stronger Damping only after a partial escape stroke of the accumulator piston takes effect.
  • FIG. 1 shows a Fuel injection device for an internal combustion engine in a simplified schematic representation
  • Figure 3 den Accumulator piston in a cross section along line III-III in Figure 2
  • Figure 4 the section II with the storage piston in an evasive position
  • Figure 5 the section II with the Accumulator piston according to a second embodiment.
  • FIG. 1 to 5 is one Fuel injection device for an internal combustion engine 10 of a motor vehicle shown.
  • the internal combustion engine has one or more cylinders, each for A fuel injector with a cylinder High pressure fuel pump 10 and one Fuel injection valve 12 is provided.
  • the High pressure fuel pump 10 and that Fuel injection valve 12 are a so-called Pump-nozzle unit summarized.
  • the High-pressure fuel pump 10 has a pump body 14, in which a pump piston 18 is sealed in a cylinder 16 is guided by a cam 20 of a camshaft Internal combustion engine against the force of a return spring 19 is driven in one stroke.
  • the pump piston 18 delimits a pump working space 22 in the cylinder 16 the fuel during the delivery stroke of the pump piston 18 High pressure is compressed.
  • the pump workspace 22 will during the suction stroke of the pump piston 18 fuel from one Fuel tank 24 supplied, for example by means of a feed pump.
  • the pump work space 22 has a connection to a relief room than the for example the fuel reservoir 24 can serve and controlled by an electrically controlled valve 23 becomes.
  • the electrically controlled valve 23 is with a Control device 25 connected.
  • the fuel injection valve 12 has a valve body 26 on, which can be formed in several parts, and with the Pump body 14 is connected.
  • the valve body 26 In the valve body 26 is in a bore 30, an injection valve member 28 guided longitudinally.
  • the bore 30 runs at least approximately parallel to the cylinder 16 of the pump body 14, can also be inclined to this.
  • the Valve body 26 faces the combustion chamber of the cylinder at least the end region facing the internal combustion engine one, preferably a plurality of injection openings 32.
  • the Injection valve member 28 faces the combustion chamber facing end region, for example an approximately conical one Sealing surface 34, which with a in the valve body 26 in its end area, which faces the combustion chamber, for example also approximately conical valve seat 36 cooperates, from or after which the injection openings 32 lead away.
  • valve body 26 In the valve body 26 is between the injection valve member 28 and the bore 30 toward the valve seat 36 toward an annular space 38 available, the one facing away from the valve seat 36 End area through a radial expansion of the bore 30 in a pressure chamber 40 surrounding the injection valve member 28 transforms.
  • the injection valve member 28 has the level of Pressure chamber 40 through a reduction in cross-section Valve seat 36 having pressure shoulder 42.
  • a preloaded closing spring 44 At the End of the injection valve member 28 facing away from the combustion chamber attacks a preloaded closing spring 44 through which the Injection valve member 28 is pressed toward the valve seat 36.
  • the closing spring 44 is arranged in a spring chamber 46, which connects to the bore 30.
  • the spring chamber 46 is preferably with a relief space, such as the Fuel reservoir 24 connected.
  • the pressure room 40 is through a through the valve body 26 and Pump body 14 extending channel 48 with the Pump work room 22 connected.
  • the closing spring 44 is at least supported on the one hand indirectly, for example via a spring plate, on Injection valve member 28 and at least on the other hand indirectly, for example also via a spring plate 51, on a storage piston 50.
  • the accumulator piston 50 points at its end region facing the closing spring 44 a shaft portion 52 through a connecting hole 53 in a partition 54 between the spring chamber 46 and one passes through this adjoining storage space 55.
  • the connection hole 53 has a smaller diameter than the spring chamber 46 and the storage space 55.
  • the storage piston 50 has in the Storage space 55 an area 56 with a larger diameter on than the connecting hole 53 so that a stroke movement of the accumulator piston 50 into the spring chamber 46 thereby it is limited that the area 56 of the accumulator piston 50 is on the partition 54 comes to rest as a stop.
  • the Accumulator piston 50 has its area 56 in a bore 57 with respect to the connecting bore 53 accordingly larger diameter tightly guided.
  • the spring chamber 46 leads from the storage chamber 55 end facing away from a bore 58 to the pump workspace 22nd through a partition 59.
  • the bore 58 has one smaller diameter than the area 56 of the Accumulator piston 50.
  • Accumulator piston 50 faces the bore 58 to the area 56 then a sealing surface 60 which is, for example, approximately conical.
  • the sealing surface 60 acts with the mouth of the bore 58 in the storage space 55 on the partition 59 together as a seat, which can also be approximately conical.
  • the Accumulator piston 50 has a protruding into bore 58 Shank 62, whose diameter is smaller than that of Area 56 is.
  • the shaft 62 faces the sealing surface 60 then a much smaller diameter on than bore 58 and towards its free end then a shaft area 64 with a diameter, which is only slightly smaller than the diameter of the hole 58.
  • the shaft region 64 can have one or have a plurality of flats 65 through the openings 66 formed between the shaft portion 64 and the bore 58 through which fuel from the pump workspace 22 in can reach the storage space 55.
  • the accumulator piston 50 is shown in FIGS First embodiment shown, in which the Accumulator piston 50 in the partition 54 facing Front side of its area 56 has a recess 68.
  • the recess 68 has a bottom 69 through which circumferential annular groove 70 may be raised.
  • the Shaft part 52 lies in the storage space 55 protruding front end at the bottom 69 of the recess 68 of the Storage piston 50 on.
  • the shaft part 52 can also be integrally formed with the accumulator piston 50.
  • the System of the shaft part 52 on the accumulator piston 50 is on the one hand by the force acting on the shaft part 52 the closing spring 44 and on the other hand by the in Pump working space 22 prevailing pressure generated force the storage piston 50 ensured.
  • By the sublime Formation of the bottom 69 of the recess of the storage piston 50 becomes a defined contact surface for the shaft part 52 ensured.
  • the shaft part 52 is subdivided into a shaft section 72 with a larger cross section arranged towards its end projecting into the storage space 55 and a shaft section 74 with a smaller cross section arranged towards the spring chamber 46.
  • the shaft section 72 which is larger in cross section, has, for example, an at least approximately circular cross section and is designed in the shape of a circular cylinder.
  • the shaft section 74 with a smaller cross section can also have an at least approximately circular cross section but with a smaller diameter than the shaft section 72 and is designed in the form of a circular cylinder.
  • the smaller cross section of the shaft section 74 is preferably formed by at least one flat 75 from the shaft section 72. Only one, two, three or more flattenings 75 can be provided distributed over the circumference of the shaft section 74.
  • the full diameter of the shaft section 72 is preferably present between the flats 75, so that the shaft section 74 is also guided in the connecting bore 53.
  • the shaft part 52 When manufacturing the shaft part 52 with the shaft sections 72, 74, it can be assumed that there is a circular cylindrical shaft part which has the diameter of the shaft section 72 throughout and on which the flats 75 are formed to form the shaft section 74 with a smaller cross section.
  • the flats 75 end at the transition to the shaft section 72 on the jacket of the shaft section 72 in control edges 76.
  • the Accumulator piston 50 is actuated by the force of closing spring 44 against the pressure prevailing in the pump work chamber 22 in held its initial position when by pressure exerted on the accumulator piston 50 in the pump work chamber 22 Force is less than the force of the closing spring 44.
  • the Accumulator piston 50 is in its starting position in FIG shown.
  • Throttle point 49 In the connection of the pressure chamber 40 with the Pump work space 22 via channel 48 can be a Throttle point 49 may be provided.
  • the throttle point 49 can also omitted, so that the pressure chamber 40 an unthrottled Has connection with the pump workspace 22.
  • the Connection of the bore 58 in which the shaft 62 of the Storage piston 50 is arranged with the pump work space 22 also takes place via the throttle point 49. It can also be provided that the pressure chamber 40 an unthrottled Has connection with the pump workspace 22 and the Bore 58 through the throttle point 49 with the Pump work space 22 is connected.
  • the function of Fuel injector explained.
  • the Pump work room 22 is during the suction stroke of the Pump piston 18 filled with fuel.
  • the control valve 23 is initially open, so that no high pressure build up in the pump work space 22 can. If fuel injection is to begin, then the control valve 23 by the control device 25 closed, so that the pump working space 22 from Fuel tank 24 is separated and in this High pressure builds up.
  • the pressure in the pump work room 22 and in the pressure chamber 40 is so high that the over Pressure shoulder 42 acting on the injection valve member 28 Force in the opening direction 29 is greater than the force of the Closing spring 44, the injection valve member 28 moves in opening direction 29 and gives the at least one Injection port 32 free through the fuel in the Combustion chamber of the cylinder is injected.
  • the Accumulator piston 50 is located in his Starting position. The pressure in the pump work space 22 increases then continue according to the profile of the cam 20 on.
  • the fuel injection valve 12 is only for open for a short period of time and it only becomes a small one Amount of fuel pre-injected into the combustion chamber injected.
  • the amount of fuel injected is in essentially from the opening pressure of the accumulator piston 50 determined, that is the pressure in the pump work chamber 22 at which the accumulator piston 50 begins its evasive stroke movement.
  • the Opening stroke of the injection valve member 28 during the Pre-injection can be done by a damping device be hydraulically limited.
  • a damping unit is through DE 39 00 762 A1 and the corresponding US Pat. No. 5,125,580 as well as DE 39 00 763 A1 and corresponding US-5,125,581 known.
  • the pressure in the pump work chamber 22 subsequently increases on according to the profile of the cam 20 so that the on the injection valve member 28 acting pressure force in Opening direction 29 increases again and that as a result of increased bias of the closing spring 44 increased Closing force exceeds, so that Fuel injection valve 12 opens again. Doing so larger amount of fuel over a longer period of time injected than during pre-injection. The length of time and the one injected during this main injection Amount of fuel is determined by the time at which the control valve 23 by the control device 25 again is opened. After opening the control valve 23 is the Pump workspace 22 again with the Fuel tank 24 connected so that this is relieved and the fuel injection valve 12 closes.
  • the storage piston 50 with the shaft part 52 is through the Force of the closing spring 44 back to its starting position moved back.
  • the time offset between the Pre-injection and the main injection is main determined by the evasive stroke of the accumulator piston 50.
  • the accumulator piston 150 is according to a second Embodiment shown, in which its training is essentially the same as the first Embodiment, however, the recess 168 in the Accumulator piston 150 designed in such a way that it Accumulator piston narrowed approximately conically.
  • a support element 180 is arranged, which is in the Well 168 supports and on which the opposite of the first Embodiment unchanged shaft part 52 for contact comes.
  • the support element 180 is preferably in the form of a Ball formed, the diameter d is larger than that smallest diameter of the recess 168.
  • the Position of the shaft part 52 to the accumulator piston 50 in the axial Direction is essential for the partial escape stroke h1 Storage piston 50, from which the larger in cross section Shank portion 74 of the shaft part 52 in the Connecting bore 53 dips and thus the Evasion stroke movement is strongly dampened.
  • the axial position of the Shaft part 52 relative to the storage piston 50 can pass through Use a ball 180 with a suitable diameter simple way to be set precisely.
  • Such balls 180 are available as standardized components with fine stepped diameters. The smaller the diameter of the Ball is 180, the further it dips into the recess 168 and the greater the partial stroke h1 until the Immersed shaft portion 74 in the connecting bore 53.

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 (8)

  1. Dispositif d'injection de carburant pour un moteur à combustion interne dans lequel :
    une pompe à haute pression (10) et un injecteur (12) alimentent en carburant le moteur, la pompe à haute pression (10) présentant un cylindre de pompe (18) entraíné par le moteur et délimitant une chambre de travail de pompe (22), une soupape (23) commandée électriquement commandant une liaison entre la chambre de travail de pompe (22) et un volume de détente (24),
    l'injecteur de carburant (12) comprend un organe d'injection (28) qui commande au moins un orifice d'injection (32) et peut être déplacé dans le sens d'ouverture (29) par la pression régnant dans une chambre de pression (40) reliée à la chambre de travail de pompe (22), contre la force d'un ressort de fermeture (44) monté dans une chambre de ressort (46),
    le ressort de fermeture (44) s'appuie d'un côté au moins indirectement sur l'organe d'injection (28) et de l'autre côté au moins indirectement sur un piston d'accumulation coulissant (50 ;150) qui est actionné sur sa face éloignée du ressort de fermeture (44) par la pression régnant dans la chambre de travail de la pompe (22),
    le piston d'accumulation (50 ; 150) partant d'une position initiale peut se déplacer contre la force du ressort de fermeture (44) dans une chambre d'accumulation (55) et le mouvement de la course de dégagement de ce piston (50 ; 150) dans la chambre (55) est limité par une butée (54),
    une partie de tige (52) mobile avec le piston d'accumulation (50 ; 150) passe à travers un alésage de liaison (53) entre la chambre d'accumulation (55) et la chambre de ressort (46),
    lorsque le piston d'accumulation (50 ; 150) se déplace en dégagement, il refoule du carburant provenant de la chambre d'accumulation (55) dans la chambre de ressort (46) à travers une fente (78) existant entre la partie de tige (52) et l'alésage de liaison (53) en produisant ainsi un amortissement du mouvement du piston d'accumulation (50 ; 150),
    caractérisé en ce que
    la partie de tige (52) présente une portion de tige (74), de plus petite section, qui se trouve, lorsque le piston d'accumulation (50 ; 150) occupe sa position initiale, dans l'alésage de liaison (53) et une portion de tige (72), de plus grande section, qui se trouve alors à l'extérieur de l'alésage de liaison (53) dans la chambre d'accumulation (55) et,
    quand le piston d'accumulation (50) effectue sa course de dégagement dans la chambre d'accumulation (55), la portion de tige (72) à plus grande section pénètre dans l'alésage de liaison (53).
  2. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la partie de tige (52) est réalisée séparée du piston d'accumulation (50 ; 150), et elle est maintenue en appui au moins indirectement sur ce piston d'accumulation (50 ; 150), d'un côté par la force du ressort de fermeture (44) et de l'autre côté par les forces produites par la pression régnant dans la chambre de travail de pompe (22).
  3. Dispositif d'injection de carburant selon la revendication 2,
    caractérisé en ce que
    la partie de tige (52) est appliquée par un élément de soutien (180) sur le piston d'accumulation (150).
  4. Dispositif d'injection de carburant selon la revendication 3,
    caractérisé en ce que
    l'élément de soutien (180) a au moins approximativement une forme sphérique et il est logé dans une cavité (168) au moins à peu près de forme conique creusée dans une face frontale du piston d'accumulation (150) située du côté de la partie de tige (52).
  5. Dispositif d'injection de carburant selon une des revendications 1 à 4,
    caractérisé en ce que
    la portion de tige (72) à plus grande section pénètre dans l'alésage de liaison (53) seulement après que le piston d'accumulation (50 ; 150) ait accompli une course de dégagement partiel (h1).
  6. Dispositif d'injection de carburant selon la revendication 5,
    caractérisé en ce que
    sur la partie de tige (52) la transition entre la portion de tige (72) à plus grande section et la portion de tige (74) à plus petite section a lieu sur un bord de commande (76) se terminant sur la surface externe de la partie de tige (52).
  7. Dispositif d'injection de carburant selon une des revendications précédentes,
    caractérisé en ce que
    sur la partie de tige (52), la portion de tige (74) à plus petite section, qui part de la portion de tige (72) à plus grande section, est constituée par au moins un plat (75) réalisé sur la périphérie de la partie de tige (52).
  8. Dispositif d'injection de carburant selon la revendication 7,
    caractérisé en ce que
    sur la partie de tige (52), la portion de tige (72) à plus grande section a au moins approximativement la forme d'un cylindre circulaire.
EP02737785A 2001-04-21 2002-04-11 Dispositif d'injection de carburant pour moteur a combustion Expired - Lifetime EP1384000B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10119602A DE10119602A1 (de) 2001-04-21 2001-04-21 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10119602 2001-04-21
PCT/DE2002/001354 WO2002086307A1 (fr) 2001-04-21 2002-04-11 Dispositif d'injection de carburant pour moteur a combustion

Publications (2)

Publication Number Publication Date
EP1384000A1 EP1384000A1 (fr) 2004-01-28
EP1384000B1 true EP1384000B1 (fr) 2004-09-22

Family

ID=7682228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02737785A Expired - Lifetime EP1384000B1 (fr) 2001-04-21 2002-04-11 Dispositif d'injection de carburant pour moteur a combustion

Country Status (7)

Country Link
US (1) US6823848B2 (fr)
EP (1) EP1384000B1 (fr)
JP (1) JP2004519590A (fr)
DE (2) DE10119602A1 (fr)
HU (1) HU224683B1 (fr)
PL (1) PL358379A1 (fr)
WO (1) WO2002086307A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254789A1 (de) * 2002-11-22 2004-06-17 L'orange Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004048322A1 (de) * 2004-10-05 2006-04-06 Robert Bosch Gmbh Kraftstoffinjektor
EP1662133A1 (fr) * 2004-11-26 2006-05-31 Siemens AG Injecteur
DE102005033634A1 (de) * 2005-07-19 2007-01-25 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB634030A (en) * 1948-03-09 1950-03-15 Cav Ltd Improvements relating to liquid fuel injection nozzles for internal combustion engines
DE3041018C2 (de) * 1980-10-31 1986-03-20 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzeinrichtung für eine luftverdichtende Einspritzbrennkraftmaschine
DE3521428A1 (de) * 1985-06-14 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzvorrichtung fuer brennkraftmaschinen
JP2523759B2 (ja) * 1987-02-04 1996-08-14 フエスト − アルピネ オウトモチブ ゲゼルシャフト ミットベシュレンクテル ハフツンク 燃料噴射ノズル
DE3813320A1 (de) * 1988-04-08 1989-10-19 Voest Alpine Automotive Pumpenduese fuer dieselmotoren
DE19844891A1 (de) * 1998-09-30 2000-04-06 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10032924A1 (de) * 2000-07-06 2002-01-24 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE20110130U1 (de) * 2001-06-19 2002-10-24 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
DE50201121D1 (de) 2004-10-28
US20040045529A1 (en) 2004-03-11
JP2004519590A (ja) 2004-07-02
HUP0301345A2 (en) 2003-08-28
HU224683B1 (hu) 2005-12-28
PL358379A1 (en) 2004-08-09
WO2002086307A1 (fr) 2002-10-31
EP1384000A1 (fr) 2004-01-28
US6823848B2 (en) 2004-11-30
DE10119602A1 (de) 2002-10-24

Similar Documents

Publication Publication Date Title
EP1458970B1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
EP1363015A1 (fr) Système d'injection de carburant pour un moteur à combustion interne
EP1357283A2 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
EP1402174B1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1456525B1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1384000B1 (fr) Dispositif d'injection de carburant pour moteur a combustion
EP1483498A1 (fr) Dispositif d'injection de carburant pour un moteur a combustion interne
DE10207045A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1525390A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1310667A2 (fr) Système d'injection de carburant pour un moteur à combustion
EP1383999B1 (fr) Dispositif d'injection de carburant pour moteur a combustion
EP1284360B1 (fr) Dispositif d'injection de carburant pour moteur à combustion interne
DE10359169A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1606511B1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
DE10146745A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10237585A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
WO2004079181A1 (fr) Soupape d'injection de carburant pour un moteur a combustion interne
DE10146532A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10233101A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10323562A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10329735A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10227011A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
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: 20031121

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VOIGT, PETER

Inventor name: DUPLAT, GERARD

Inventor name: POURRET, RAPHAEL

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 IT

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20040922

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50201121

Country of ref document: DE

Date of ref document: 20041028

Kind code of ref document: P

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

Effective date: 20050116

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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: 20050623

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

Ref country code: FR

Payment date: 20080418

Year of fee payment: 7

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

Ref country code: GB

Payment date: 20080423

Year of fee payment: 7

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

Effective date: 20090411

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20091231

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: 20091222

Ref country code: GB

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

Effective date: 20090411

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

Ref country code: DE

Payment date: 20110628

Year of fee payment: 10

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50201121

Country of ref document: DE

Effective date: 20121101

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: 20121101