EP1520095B1 - Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur - Google Patents

Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur Download PDF

Info

Publication number
EP1520095B1
EP1520095B1 EP03718646A EP03718646A EP1520095B1 EP 1520095 B1 EP1520095 B1 EP 1520095B1 EP 03718646 A EP03718646 A EP 03718646A EP 03718646 A EP03718646 A EP 03718646A EP 1520095 B1 EP1520095 B1 EP 1520095B1
Authority
EP
European Patent Office
Prior art keywords
injection
pressure
valve
space
control
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
EP03718646A
Other languages
German (de)
English (en)
Other versions
EP1520095A1 (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 EP1520095A1 publication Critical patent/EP1520095A1/fr
Application granted granted Critical
Publication of EP1520095B1 publication Critical patent/EP1520095B1/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
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • accumulator injection (Common Rail) allow advantageously the injection pressure to load and to adjust the speed of the self-igniting internal combustion engine. To achieve high specific power and to reduce the emissions of the internal combustion engine In general, the highest possible injection pressure is required.
  • DE 199 10 970 A1 relates to a fuel injection device.
  • This fuel injection device has one between an accumulator chamber and a nozzle chamber arranged pressure booster unit, whose pressure chamber via a pressure line connected to the nozzle chamber. Furthermore, a connected to the pressure accumulator space Bypass line provided.
  • the bypass line is directly connected to the pressure line connected.
  • the bypass line is suitable for pressure injection and is parallel arranged to the pressure chamber, so that the bypass line regardless of the movement and position of a displaceable pressure medium of the pressure booster unit throughout is. This measure increases the flexibility of the injection.
  • a difference room is connected via a 2/2-way valve with a leakage line and it is a connection from the differential space to the pressure storage room.
  • the pressure booster unit is a valve assembly for controlling the same outside the injector at any one Place assigned between the accumulator chamber and the injector.
  • DE 100 40 526 A1 also relates to a fuel injection device.
  • This one has between a pressure accumulator space and a nozzle chamber arranged pressure booster unit on, comprising a displaceable piston unit to the pressure of the To increase nozzle space to be supplied fuel.
  • the piston unit points to the control the pressure intensifier unit a transition from a larger to a smaller one Piston cross-section and a differential space formed thereby.
  • the difference space is connected via a filling path with a filling valve to the pressure storage space. There will be a reduction in the amount of control during the activation of the Pressure booster unit and performing a quick reset of the piston unit reached.
  • a pressure intensifier under Dispensing with a separate actuator directly via the movement of an injection valve member which is designed in an advantageous manner as a nozzle needle to achieve.
  • the pressure booster can be switched on during the opening movement of the injection valve member become.
  • the pressure booster comprises a working space and control room separating it Piston unit on which a partial stroke is adjustable, after passing through the pressure booster can be switched on. This can be with regard to the design of a fuel injector achieve considerable advantages with a pressure intensifier.
  • pilot injections into the combustion chamber of a self-igniting internal combustion engine possible without activating the pressure intensifier. It can therefore a pilot injection is generated, which takes place at a pressure level which is in the essentially in the interior of a high-pressure accumulator space (common rail) prevailing Pressure levels corresponds.
  • a pilot injection is generated, which takes place at a pressure level which is in the essentially in the interior of a high-pressure accumulator space (common rail) prevailing Pressure levels corresponds.
  • the intensifier can build up pressure during the main injection phase to the maximum allowable pressure with the injection valve member in the open position be achieved.
  • the pressure booster before closing the injection valve member, which preferably as a nozzle needle is formed reach, causing pressure peaks above the maximum Avoid injection pressure when closing the needle. This has a favorable effect the life of the fuel injection system on a self-igniting internal combustion engine out.
  • a main injection phase can be achieved reach downstream post-injection phase under very high injection pressure, as well as a remote post-injection, which in a slightly longer sized Time interval follows the main injection.
  • FIG. 1 is a first embodiment of an actuatable via an injection valve member Removable pressure intensifier, which is shown in a first state, in which the Control chamber of the pressure booster from the return, i. from the low pressure area of the fuel injection system is disconnected.
  • a high-pressure inlet 2 extends to a Pressure Translator 3.
  • the high pressure inlet 2 comprises a high pressure line 7, in a Check valve 8 may be included.
  • Parallel to the high pressure line 7 is through the high pressure inlet 2 from the high pressure source 1 from a parallel branch 11 is applied, in which a filling valve 10 may be included.
  • another parallel branch 12 which includes a throttle 13.
  • the former, the filling valve 10 receiving Parallel branch opens as well as the other parallel branch 12, the throttle point 13 receives, in a control chamber 15 of the pressure booster 3.
  • the pressure booster 3 comprises In addition, a working space 14, which also via the high-pressure inlet 2 is in communication with the high pressure source 1.
  • the fuel injector 4 shown in Figure 1 comprises an injection valve member 34, which is advantageously designed as a nozzle needle.
  • the injection valve member 34 is acted upon in the embodiment of Figure 1 by a one-piece valve element 27, which may be designed as a valve piston.
  • the end face 29 of the integrally formed valve element 27 limits the control chamber 21, which can be filled via the inlet throttle point 23 and pressure relief via the outlet throttle point 24.
  • Below the control chamber 21 formed as a valve piston one-piece valve element 27 is surrounded by an annular space 33, in which the control line 19 opens, which connects the annular space 33 with the control chamber 15 of the pressure booster 3.
  • a control edge 31 is formed, which cooperates with a control edge 30, which is embodied on the one-piece valve element 27.
  • the injection takes place from the exceeding of the stroke h 1 (see reference numeral 32) with a translated, ie higher pressure.
  • This can be a boat-shaped injection achieve.
  • the first injection phase for example the pre-injection phase, takes place at the pressure level which is available, for example, as a high-pressure reservoir (common rail) high-pressure source 1, followed by another injection phase at a much higher injection pressure level, which is due to the pressure surface conditions the piston unit 17 of the pressure booster 3 results and is present on the compression space line 20 in the nozzle chamber 36 in the nozzle body 6 of the fuel injector 4.
  • Figure 2 shows the embodiment of a fuel injector according to Figure 1 with a Pressure intensifier in a second state.
  • control valve 25 which preferably as a 2/2-way valve is formed, closed, so that in the control chamber 21 of the injection valve member 34 sets a pressure build-up. Due to the application of the end face 29 of the one-piece Valve element 27 moves with this cooperating injection valve member 34 in the closing direction. Upon reaching the control edge 31 on the nozzle body 6 takes place an overlap of the control edges 30 and 31 with each other, so that the formed by them Slider seal is closed. As a result, the connection of the control room 15 via the control line 19 and the annular space 33 in the low-pressure side return 26th closed and the pressure booster 3 thus deactivated.
  • the stroke h 1 (reference numeral 32) and the closing speed of the injection valve member 34 and the valve member 27 can be the shutdown time of the pressure booster 3, that is, the timing of the overlap of the control edges 30 and 31, tune optimally to the end of the respective injection phase.
  • the injection valve member 34 which is preferably designed as a nozzle needle, not completely along the entire stroke h 1 (reference numeral 32) are opened, so that the pressure booster 3 remains deactivated.
  • any number of pilot injections can be realized without activated pressure booster 3.
  • the pressure level within the scope of the pilot injection for conditioning the combustion mixture contained in the combustion chamber 41 is within the scope of these pilot injections at the pressure level which the high-pressure source 1, for example a high-pressure reservoir (common rail), provides and can not be increased to that achievable by the pressure booster 3 pressure level.
  • the number and duration of the respective pilot injection phases and the duration of the main injection at an elevated pressure level can be adjusted by the activation time of the control valve 25.
  • FIG. 3 a further embodiment variant of FIG Injector valve operated pressure intensifier with two valve elements in one another out.
  • the Ksaftstoffinjektor 4 shown in Figure 3 for fuel supply of a self-igniting Internal combustion engine comprises an integrated in the injector body 5 Compressor 3. From a high pressure source 1 via a high-pressure inlet 2 a high-pressure line 7, a first parallel branch 11 and a further parallel branch 12 and the working space 14 of the pressure booster 3 acted upon.
  • a filling valve 10 12 further included a throttle point 13 in parallel branch.
  • a check valve 8 is received in the high-pressure line 7, a check valve 8 is received.
  • the pressure intensifier 3 according to the further embodiment in Figure 3 comprises analog for the pressure booster 3 shown in FIG. 1, a piston unit 17 which houses the working space 14 separates from the control room 15. With the underside of the piston unit 17, the compression space 18 in the injector body 5 of the pressure booster 3 is acted upon by the compression space line 20 branches off to the nozzle chamber inlet 9 and with the high pressure line 7 united by the high pressure source 1.
  • the injection valve member 34 is acted on by a multipart valve element 28, as shown in FIG.
  • the multi-part valve element 28 comprises a first valve element 28.1 and a further, second valve element 28.2 surrounding this.
  • the first valve element 28.1 and the further valve element 28.2 can be formed in the shape of a piston.
  • An annular surface 60 on the second valve element 28.2 partially delimits the control chamber 21.
  • an opening 61 is formed, via which an end face 62 of the first valve element 28.1 can be acted upon by the pressure prevailing in the control chamber 21.
  • a stroke h 1 (reference numeral 32) is set between the inner, first valve element 28. 1, ie its end face 62, and a collar at the opening 61 in the second valve element 28. 2 of the multi-part valve element 28.
  • On the second valve element 28.2 is the control edge 30, which cooperates with a seat of a valve chamber 63.
  • the control line 19 from the control chamber 15 of the pressure booster 3.
  • From the valve chamber 63 branches off a first return line 64 to the low pressure side of the fuel supply system.
  • a piston extension 66 is formed, which has a smaller diameter than the piston part of the first valve element 28.1.
  • the piston extension 66 passes through a further, arranged below the valve chamber 63 in the nozzle body 6 cavity in which a closing spring 67 is received.
  • the end face of the piston extension 66 bears against the end face of the injection valve member 34, which is preferably in the form of a nozzle needle.
  • FIG. 4 shows a variant of an embodiment of an injection valve member actuated Pressure booster with two valve elements, one of which is spring-loaded is.
  • the high-pressure inlet 2 extends over both High-pressure line branch 7, which contains a check valve 8 as well as a first Parallel branch 11 and another parallel branch 12 to the control chamber 15 of the pressure booster 3.
  • the high-pressure source 1 acts on a high-pressure storage space (Common rail), the working space 14 of the pressure booster 3 directly.
  • the working chamber 14 and the control chamber 15 of the pressure booster 3 are via a piston unit 17 separated from each other, wherein the working space 14 zu josde end face the piston unit 17 has a larger diameter than that end face of the Piston unit 17, which limits the compression space 18 of the pressure booster 3.
  • From the compression space 18 within the injector body 5 of the fuel injector 4 extends a compression space line 20, which is connected to the check valve. 8 receiving high pressure line 7 combined and merges into the nozzle chamber inlet 9.
  • the control chamber 21 within the fuel injector 4 is via a high-pressure branch 22 pressurized with inlet throttle point 23 and is via an outlet throttle point 24th upon actuation of a control valve 25 in the low-pressure side return 26 pressure relieved.
  • a multipart valve element 28 is used.
  • the multi-part trained Valve element 28, which the injection valve member 34 in the nozzle body 6 of the fuel injector 4 acted upon, comprises a first valve element 28.1, whose end face 62 the control chamber 21 limited.
  • the first valve element 28.1 comprises a piston extension 66, which with its lower end face abuts the end face of the injection valve member 34.
  • the first Valve element 28.1 is surrounded by a second, further valve element 28.2, wherein between the first valve element 28.1 and the second valve element 28.2 a Passage gap 72 sets.
  • control valve 25 which is preferably designed as a 2/2-way valve
  • the control valve 25 which is preferably designed as a 2/2-way valve
  • the control chamber 21 above the end face 62 of the first valve element 28.1 as long pressure relieved that the end face of the injection valve member 34 abuts the lower annular surface of the second valve element 28.2, ie the stroke is exceeded h 1 (reference numeral 32)
  • the pressure booster 3 through the injection valve member 34 activated because due to the force acting on the pressure shoulder 35 hydraulic force in the nozzle chamber 36 of the sealing seat between the control edges 30 on the second valve element 28.2 and the control edge 31 of the valve chamber 63 is opened and a pressure reduction in the control chamber 15 of the pressure booster 3 via the line 19 in the first low-pressure side return 64 can take place.
  • the fuel compressed in the compression space 18 of the pressure booster 3 is in the nozzle space 36 via the compression space line 20 to the nozzle chamber inlet 9 at the discharge point 37 of the nozzle chamber inlet 9 in the nozzle chamber 36.
  • the solution shown in Figure 4 can be given a certain pressure relief of the control chamber 21 of the injection valve member 34 within certain limits, ie so that the Auffahrweg of the injection valve member 34 below the stroke h 1 (reference numeral 32), pilot injection phases on the pressure prevailing in the high pressure source 1 pressure level represent, from a further sustained pressure relief of the control chamber 21 via the injection valve member 34, an activation of the pressure booster 3 takes place, and a main injection phase can be realized with rate-shaping at an elevated pressure level.
  • one or more pilot injection phases can be made, only depending on the drive times and the control program of the control valve 25, which can be preferably designed as a 2/2-way valve.
  • a first pressure level for example, the pressure level of a high-pressure source. 1 equivalent.

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 (17)

  1. Dispositif pour injecter du carburant dans une chambre de combustion (41) d'un moteur à combustion interne comportant :
    un corps d'injecteur (5, 6) logeant un organe d'injecteur (34) manoeuvré en chargeant/déchargeant en pression une chambre de commande (21) grâce à une soupape de commande (25) et
    un démultiplicateur de pression (3) composé d'une unité de piston (17) qui sépare une chambre de travail (14) et une chambre de commande (15) et qui alimente une chambre de compression (18) reliée à une chambre de buses (36) entourant l'organe d'injecteur (34),
    caractérisé en ce que
    la chambre de commande (15) du démultiplicateur de pression (3) est chargée (2, 11, 12)/déchargée (19, 26, 64) en pression en fonction de la course de l'organe d'injecteur (34).
  2. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    à l'organe d'injecteur (34) est associé un élément de soupape (27, 28) mobile à l'intérieur d'une chambre (33, 63) hydraulique dans laquelle débouche une conduite de commande (19) provenant de la chambre de commande (15) du démultiplicateur de pression (3).
  3. Dispositif pour injecter du carburant selon la revendication 2,
    caractérisé en ce qu'
    l'élément de soupape (27, 28) placé à l'intérieur de la chambre (33, 63) hydraulique alimente le côté frontal - de l'organe d'injecteur (34) - détourné des orifices d'injection (39) côté chambre de combustion.
  4. Dispositif pour injecter du carburant selon la revendication 2,
    caractérisé en ce que
    par une surface (29, 60, 62) sous action hydraulique, l'élément de soupape (27, 28) dépasse dans une chambre de commande (21) qui alimente en pression l'organe d'injecteur (34).
  5. Dispositif pour injecter du carburant selon la revendication 2,
    caractérisé en ce que
    l'élément de soupape (27) forme une seule partie et est muni d'une rampe hélicoïdale (30) qui forme une garniture coulissante avec une rampe hélicoïdale (31) sur la chambre hydraulique (33).
  6. Dispositif pour injecter du carburant selon la revendication 2,
    caractérisé en ce que
    une conduite de reflux (26.2, 64) venant de la chambre hydraulique (33, 63) aboutit dans la zone basse pression.
  7. Dispositif pour injecter du carburant selon les revendications 5 et 6,
    caractérisé en ce que
    lorsque la course de l'organe d'injecteur (34) déclenchée du fait que la chambre de commande (21) est déchargée en pression est inférieure à une course h1 (32) - qui recouvre les rampes hélicoïdales (30, 31), la garniture coulissante (30, 31) reste fermée et du carburant est injecté dans la chambre de combustion (41) à un premier niveau de pression.
  8. Dispositif pour injecter du carburant selon les revendications 5 et 6,
    caractérisé en ce que
    lorsque du fait que la chambre de commande (21) est davantage déchargée en pression une course excessive de l'organe d'injecteur (34) dépasse la course h1 (32), la chambre de commande (15) du démultiplicateur de pression (3) peut être reliée à la deuxième conduite de reflux (26.2) côté basse pression par la conduite de commande (19) et par les rampes hélicoïdales (30, 31) qui restent ouvertes, et du carburant est injecté dans une chambre de combustion (41) à un deuxième niveau de pression plus élevé.
  9. Dispositif pour injecter du carburant selon la revendication 2,
    caractérisé en ce que
    l'élément de soupape (28) est composé de plusieurs parties et comprend une première partie de soupape (28.1) et une deuxième partie de soupape (28.2) dont au moins une est alimentée par la pression qui règne dans la chambre de commande (21) de l'organe d'injecteur (34).
  10. Dispositif pour injecter du carburant selon la revendication 9,
    caractérisé en ce que
    la première partie de soupape (28.1) est guidée dans la deuxième partie de soupape (28.2), et
    une course h1 (32) est réglée entre un côté frontal (29) de la première partie de soupape (28.1) et une butée de course (68) de la deuxième partie de soupape (28.2).
  11. Dispositif pour injecter du carburant selon la revendication 10,
    caractérisé en ce que
    la deuxième partie de soupape (28.2) présente une rampe hélicoïdale (30) qui coopère avec un siège d'étanchéité dans la chambre hydraulique (63).
  12. Dispositif pour injecter du carburant selon les revendications 10 et 11,
    caractérisé en ce que
    lorsque la chambre de commande (21) est déchargée en pression, la première partie de soupape (28.1) parcourt la course hi (32) vers la butée (68) et l'organe d'injecteur (34) injecte du carburant dans la chambre de combustion (41) à un premier niveau de pression.
  13. Dispositif pour injecter du carburant selon les revendications 10 et 11,
    caractérisé en ce que
    lorsque la chambre de commande (21) est davantage déchargée en pression, la première partie de soupape (28.1) après avoir parcouru la course h1 (32) déplace la deuxième partie de soupape (28.2) sur le siège d'étanchéité dans la chambre hydraulique (63), décharge la chambre de commande (15) par l'intermédiaire de la conduite de commande (19) et par la chambre hydraulique (63) côté basse pression, et du carburant est injecté à un deuxième niveau de pression plus élevé.
  14. Dispositif pour injecter du carburant selon la revendication 9,
    caractérisé en ce qu'
    une des parties de soupape (28.1, 28.2) de l'élément de soupape (28) en plusieurs parties est manoeuvrée par un élément de ressort (70) et est placée dans un siège d'étanchéité dans la chambre hydraulique (63).
  15. Dispositif pour injecter du carburant selon les revendications 9 et 14,
    caractérisé en ce qu'
    un prolongement de piston (66) de la première partie de soupape (28.1) traverse la deuxième partie de soupape (28.2) en formant un intervalle annulaire (72), et
    le prolongement de piston (66) de la première partie de soupape (28.1) manoeuvre frontalement l'organe d'injecteur (34).
  16. Dispositif pour injecter du carburant selon les revendications 9 et 14,
    caractérisé en ce qu'
    on peut prédéfinir entre la deuxième partie de soupape (28.2) et l'organe d'injecteur (34) une course h1 (32) de laquelle l'organe d'injecteur (34) peut se déplacer lorsqu'une chambre de commande (21) est déchargée en pression afin d'injecter du carburant à un premier niveau de pression.
  17. Dispositif pour injecter du carburant selon la revendication 9 et 16,
    caractérisé en ce que
    lorsque la chambre de commande (21) est davantage déchargée en pression et que l'organe d'injecteur (34) a un mouvement d'ouverture qui dépasse la course h1 (32), cet organe d'injecteur fait sortir la deuxième partie de soupape (28.2) de son siège dans la chambre hydraulique (63) et décharge côté basse pression la chambre de commande (15) du démultiplicateur de pression (3) par l'intermédiaire d'une conduite de commande (19), de sorte que du carburant est injecté dans la chambre de combustion (41) à un deuxième niveau de pression plus élevé.
EP03718646A 2002-06-29 2003-04-03 Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur Expired - Lifetime EP1520095B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10229413 2002-06-29
DE10229413A DE10229413A1 (de) 2002-06-29 2002-06-29 Druckübersetzersteuerung durch Bewegung eines Einspritzventilgliedes
PCT/DE2003/001100 WO2004003373A1 (fr) 2002-06-29 2003-04-03 Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur

Publications (2)

Publication Number Publication Date
EP1520095A1 EP1520095A1 (fr) 2005-04-06
EP1520095B1 true EP1520095B1 (fr) 2005-11-02

Family

ID=29796046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03718646A Expired - Lifetime EP1520095B1 (fr) 2002-06-29 2003-04-03 Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur

Country Status (5)

Country Link
US (1) US20050116058A1 (fr)
EP (1) EP1520095B1 (fr)
JP (1) JP2005531714A (fr)
DE (2) DE10229413A1 (fr)
WO (1) WO2004003373A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017305A1 (de) * 2004-04-08 2005-10-27 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln
DE102004019836A1 (de) * 2004-04-23 2005-11-17 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004022268A1 (de) * 2004-05-06 2005-12-01 Robert Bosch Gmbh Ansteuerverfahren zur Beeinflussung der Öffnungsgeschwindigkeit eines Steuerventiles an einem Kraftstoffinjektor
DE102004028521A1 (de) * 2004-06-11 2005-12-29 Robert Bosch Gmbh Kraftstoffinjektor mit mehrteiligem Einspritzventilglied und mit Druckverstärker
DE102004035293A1 (de) * 2004-07-21 2006-02-16 Robert Bosch Gmbh Kraftstoffinjektor mit Nadelhubdämpfung
JP4075894B2 (ja) * 2004-09-24 2008-04-16 トヨタ自動車株式会社 燃料噴射装置
US7334741B2 (en) * 2005-01-28 2008-02-26 Cummins Inc. Fuel injector with injection rate control
DE102005033123B3 (de) * 2005-07-15 2006-12-21 L'orange Gmbh Kraftstoffinjektor
DE102006062216A1 (de) * 2006-12-22 2008-06-26 Robert Bosch Gmbh Kraftstoffinjektor
US7832374B2 (en) * 2008-10-21 2010-11-16 Gm Global Technology Operations, Inc. Fuel pressure amplifier
US8775054B2 (en) 2012-05-04 2014-07-08 GM Global Technology Operations LLC Cold start engine control systems and methods
EP3234340B1 (fr) * 2014-12-19 2020-07-08 Volvo Truck Corporation Système d'injection d'un moteur à combustion interne et véhicule automobile comprenant un tel système d'injection
CN104847553A (zh) * 2015-04-09 2015-08-19 中国第一汽车股份有限公司无锡油泵油嘴研究所 可优化喷油速率且可增压式共轨喷油器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19706469A1 (de) * 1997-02-19 1998-08-27 Daimler Benz Ag Speichereinspritzsystem für eine mehrzylindrige Brennkraftmaschine mit magnetventilgesteuerten Kraftstoffeinspritzventilen
DE19910970A1 (de) * 1999-03-12 2000-09-28 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
DE19956598A1 (de) * 1999-11-25 2001-06-13 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

Also Published As

Publication number Publication date
WO2004003373A1 (fr) 2004-01-08
DE10229413A1 (de) 2004-01-29
EP1520095A1 (fr) 2005-04-06
DE50301573D1 (de) 2005-12-08
JP2005531714A (ja) 2005-10-20
US20050116058A1 (en) 2005-06-02

Similar Documents

Publication Publication Date Title
EP1520096B1 (fr) Systeme a rampe commune comprenant une buse variable et un systeme multiplicateur de pression
EP1654455B1 (fr) Soupape de commande pour un injecteur de carburant contenant un multiplicateur de pression
EP1078160B1 (fr) Systeme d'injection de carburant
EP1520099B1 (fr) Injecteur de carburant a multiplicateur de pression a reduction de pression rapide lors de l'injection
WO2004088122A1 (fr) Injecteur de carburant comportant un transmetteur de pression commande par une soupape asservie
EP1520095B1 (fr) Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur
EP1584813A2 (fr) Injecteur pour moteur à combustion avec une aiguille d'injection contrôlée directement
EP1125054B1 (fr) Procede et dispositif pour la realisation d'une injection de carburant
EP1520100B1 (fr) Dispositif permettant d'amortir la course de l'aiguille sur des injecteurs de carburant commandes par pression
EP1552137B1 (fr) Dispositif de suppression d'ondes de pression sur un systeme d'injection a accumulation
WO2004003378A1 (fr) Injecteur de carburant a multiplicateur de pression pour injection multiple
WO2003054374A1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
DE10221384A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10132732A1 (de) Kraftstoffeinspritzeinrichtung
EP1651861B1 (fr) Soupape de commande a compensation de pression pour un injecteur de carburant comprenant un multiplicateur de pression
WO2004040117A1 (fr) Systeme d'injection de carburant pour moteurs a combustion interne
EP1682769B1 (fr) Injecteur de carburant dote d'un element de soupape d'injection en plusieurs parties, en commande directe
DE102005032464A1 (de) Kraftstoffinjektor mit Vorsteuerraum
WO2004070201A1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1392965B1 (fr) Amplificateur de pression pour systeme d'injection de carburant
EP1354133A2 (fr) Dispositif d'injection de carburant
WO2007009641A1 (fr) Injecteur de carburant
DE102004038189A1 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln
DE10251679A1 (de) Druckverstärker mit hubabhängiger Bedämpfung
DE102005029805A1 (de) Kraftstoffinjektor mit Verzögerungseinrichtung zur Verlängerung der Druckverstärkungsphase

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: 20050131

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 IT

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

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: 50301573

Country of ref document: DE

Date of ref document: 20051208

Kind code of ref document: P

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

Effective date: 20060221

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: 20060803

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

Ref country code: DE

Payment date: 20080626

Year of fee payment: 6

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

Ref country code: FR

Payment date: 20090420

Year of fee payment: 7

Ref country code: IT

Payment date: 20090429

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: 20090424

Year of fee payment: 7

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: 20091103

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

Effective date: 20100403

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101230

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: 20100403

Ref country code: IT

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

Effective date: 20100403

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: 20100430