EP1520101B1 - Injecteur de carburant a multiplicateur de pression pour injection multiple - Google Patents

Injecteur de carburant a multiplicateur de pression pour injection multiple Download PDF

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Publication number
EP1520101B1
EP1520101B1 EP03720254A EP03720254A EP1520101B1 EP 1520101 B1 EP1520101 B1 EP 1520101B1 EP 03720254 A EP03720254 A EP 03720254A EP 03720254 A EP03720254 A EP 03720254A EP 1520101 B1 EP1520101 B1 EP 1520101B1
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EP
European Patent Office
Prior art keywords
pressure
injection
space
piston
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
EP03720254A
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German (de)
English (en)
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EP1520101A1 (fr
Inventor
Volkmar Kern
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
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1520101A1 publication Critical patent/EP1520101A1/fr
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02M45/06—Pumps peculiar thereto
    • F02M45/066—Having specially arranged spill port and spill contour on the piston
    • 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
    • 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
    • F02M47/025—Hydraulically 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
    • 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
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—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

Definitions

  • EP 0 562 046 B1 discloses an actuation and valve arrangement with damping for an electronically controlled injection unit.
  • the actuation and valve arrangement for a hydraulic unit has an electrically energizable electromagnet with a fixed stator and a movable anchor.
  • the anchor has a first and a second Surface on.
  • the first and second surfaces of the anchor define first and second a second cavity, wherein the first surface of the armature assigns to the stator.
  • the valve is able to To pass from a sump a hydraulic actuating fluid to the injector.
  • a damping fluid may be with respect to one of the cavities of the solenoid assembly be collected there or be drained from there.
  • DE 101 23 910.6 relates to a fuel injection device. This is at a Internal combustion engine used.
  • the combustion chambers of the internal combustion engine are supplied with fuel via fuel injectors.
  • the fuel injectors are acted upon by a high pressure source;
  • the fuel injection according to DE 101 23 910.6 a pressure booster, a movable pressure booster piston having a connectable to the high pressure source space of a with the Fuel injector connected high-pressure chamber separates
  • the fuel pressure in the high-pressure chamber can be achieved by filling a back space of the pressure booster with fuel or vary by draining this backspace of fuel.
  • the fuel injector comprises a movable closing piston for opening or closing the injection ports facing the combustion chamber.
  • the closing piston protrudes a closing pressure chamber, so that it can be acted upon by fuel pressure. Thereby a force acting on the closing piston in the closing direction is achieved.
  • a closing pressure chamber for opening or closing the injection ports facing the combustion chamber.
  • the closing piston protrudes a closing pressure chamber, so that it can be acted upon by fuel pressure. Thereby a force acting on the closing piston in the closing direction is achieved.
  • the Closing pressure room and another room are shared by a working room formed, with all parts of the working space permanently for the exchange of Fuel are interconnected.
  • the inventively proposed fuel injector with pressure booster allows the Execution of multiple injections into the combustion chamber of a self-igniting internal combustion engine by running on a pressure booster piston control sections. These allow for operation in combination with a 2/2-way valve the pressure translator, i. for pressure build-up in a compression chamber and for pressure relief a control room, multiple injections at a high pressure level.
  • the use of one for mass production of injection components rather unsuitable 3/2-way valve, which in the required tolerances difficult and with high Costs connected to manufacture can be avoided.
  • Control sections on a rotationally symmetric component such as e.g. a pressure booster piston, can be produced cheaper in terms of the required accuracy;
  • the 2/2-way valve used on the pressure-translated fuel injector has a relatively simple and interference-insensitive construction.
  • the smallest pilot injection quantities to be injected can be at the pressure booster piston formed control sections with respect to their axial length, i. in Lifting direction of the pressure booster piston, very narrow.
  • the control sections can be realized another pre-injection phase, which accordingly The design of the control sections may be shorter or longer than a previous first pilot phase, for example.
  • a first preinjection phase downstream pilot injection phase can by appropriate interpretation of the control sections and a longer main injection phase in the combustion chamber of the internal combustion engine can be realized with little effort.
  • the single FIGURE shows the hydraulic circuit diagram of an executed according to the invention Kraftstoffinjektors, in which the working space of an upstream pressure booster on a high pressure accumulator (common rail) with high pressure fuel can be acted upon.
  • the figure shows a device for injecting fuel with a fuel injector, which is preceded by a pressure booster and via a 2/2-way valve trained metering valve is actuated
  • a fuel injector 1 comprises a high-pressure storage space 2, a pressure booster 5 and a preferred designed as 2/2-way valve metering valve 6.
  • the pressure intensifier 5 is a Downstream of injection valve, the injection valve member 34 via a hydraulic Room 31 and a nozzle chamber 28 can be actuated.
  • the pressure booster 5 From high-pressure accumulator 2 (common rail) runs a supply line 9, which has an inlet 42 to a working space 10 of the pressure booster 5 has.
  • the pressure booster 5 comprises a control chamber 11.
  • the working chamber 10 of the pressure booster 5 is separated from the control chamber 11 of the pressure booster 5 by a piston 12, in the embodiment according to Figure 1, a first part piston 13 in enlarged Diameter and a second partial piston 14 in comparison to the first part piston 13th reduced diameter.
  • the first partial piston 13 and the second partial piston 14 may be formed as separate components; in a modification of that shown in Figure 1 Structure of the piston 12, the first part piston 13 and the second part piston 14 also be formed integrally.
  • the second sub-piston 14 of the piston 12 within the pressure booster 5 is through a preferably acted as a spiral spring spring element 17 acted on the one hand at the bottom of the control chamber 11 of the pressure booster 5 and on the other hand to a spring stop 18 in the upper region of the first piston 14 is supported.
  • the pressure intensifier 5 also includes a trained example as a support ring 16 stop for the upper end side of the first part piston 13 of the piston 12th
  • the control chamber 11 of the pressure booster 5 is connected via a control line 26 with the preferred designed as a 2/2-way valve metering valve 6 in conjunction, wherein the Circuit from the closed position shown in Figure 1 in the open position a Drukkentlastung the control chamber 11 in a low-pressure side return 8 causes. That as 2/2-way valve formed metering valve 6 can be used both as a solenoid valve and piezoelectric actuator be formed trained. Furthermore, the 2/2-way valve according to the in FIG illustrated embodiment as a servo valve or directly applied valve be formed.
  • the control chamber 11 of the pressure booster is beyond about an overflow line 41 with a compression chamber 15 in the lower region of the pressure booster 5 in connection.
  • a connecting line 32 from which the compression space 15 of the pressure booster. 5 connects to a hydraulic chamber 31, which can be formed preferably as a nozzle needle Injection valve member 34 acted upon.
  • the compression chamber 15 is connected to the hydraulic Room 31 parallel to the connecting line 32 between the hydraulic space 31st and the compression chamber 15 connected via another line, which is a throttle point 30 contains.
  • a fuel inlet 27 branches off, which is in a nozzle chamber 28 opens.
  • the nozzle space designated by reference numeral 28 is within one Nozzle body 4 of the fuel injector 1 is formed and encloses the injection valve member 34 annular. In the region of the nozzle chamber 28 is on the outer circumference of the injection valve member 34, a pressure shoulder 38 is formed.
  • the hydraulic chamber 31 contains a spring element 33 designed as a spiral spring which on the one hand on the ceiling of the hydraulic chamber 31 and on the other hand on the End face 35 of the injection valve member 34 is supported.
  • the injection valve member 34 encloses in the region of a pressure stage 38, runs as an annular gap 26th trained inlet in the direction of the needle tip 37 out.
  • a combustion chamber side seat of the injection valve member 34 is formed.
  • This configured as a conical seat seat on the needle tip 37 of the Injection valve member 34 opens or closes in a combustion chamber 7 of a self-igniting Internal combustion engine opening injection ports 39, the double as Hole rows or simple hole rows holes can be formed in a circular shape and about which the fuel when entering the combustion chamber 7 of the self-igniting internal combustion engine atomized.
  • the ruling in the interior of the high-pressure accumulator chamber 2 Pressure on the working space 10 of the booster on is preferably designed as a 2/2-way valve Metering valve 6 is not activated and there is no injection.
  • this Condition is in the high-pressure reservoir 2 (common rail) applied pressure in the working space 10 of the pressure booster 5 at the metering valve 6 via the working space 10, an im first partial piston 13 formed throttle body 40, via the control chamber 11 and the control line 26 on.
  • the inside of the high pressure accumulator 2 prevailing pressure via a arranged in the supply line 9 check valve 43 via the Fuel inlet 27 in the nozzle chamber 28 of the injector body 4 on; in which the front side 35 of Injection valve member 34 acted upon hydraulic chamber 31 is the inside the pressure accumulator 2 prevailing pressure via the supply line 9, the check valve 43, the inlet 29 to the compression chamber 15 and the line branching off there with throttle 30 on.
  • the compression space 15 of the pressure booster is via the inlet 29, seen in the flow direction of the fuel behind the Check valve 43 branches off from the supply line 9, with high pressure Fuel filled.
  • the nozzle body 4 of the fuel injector 1 are at the compression space 15 of the Pressure translator 5 facing side of the second piston part 14 of the piston 12 control sections 19 and 21 formed.
  • the control sections 19 and 21 in the stroke direction of the first piston part 14 in the Compression space 15 of the pressure booster 5 seen, one behind the other.
  • On the peripheral surface of the second sub-piston 14 is a control portion 19 in a compared to Outside diameter of the first part piston 14 of reduced diameter formed, the seen in the stroke direction of the second part piston 14, in a first axial length 19.1 extends.
  • the further control section 21 is separated from the control section 19 by a collar.
  • the collar which separates the control section 19 from the further control section 21 is in first diameter of the first part piston 14 executed.
  • the axial length 21.1 of the other Control section 21 is compared to the axial length 19.1 of the control section 19th considerably smaller. While the control section 19 is formed as an annular space, is the further control section 21 in comparison to the control section 19, for example as Obtain annular groove.
  • the control section 19 is on the collar on the first part piston 14 by a control edge 20th limited, while on the opposite side of the covenant on the outer circumference of the first Partial piston 14, a second control edge 22 limits the further control section 21.
  • the active relief of the hydraulic chamber 31 in the nozzle body 4 of the fuel injector takes place by an immersion movement of the first part piston 14 in the compression space 15.
  • Has the second part piston 14 covered a certain stroke connects the further control section 21, which may be formed as an annular groove, has a cross section between the hydraulic chamber 31 and the connecting line 32 on the one hand the overflow line 41 into the control chamber 11, the control line 26 to the low pressure side Return 8 on the other hand with each other.
  • the further control section 21 of the hydraulic chamber 31 are placed on low pressure, so that the force acting on the end face 35 of the injection valve member 34 decreases, so that the Injection valve member 34 can not be held in its closed position.
  • the injection pressure is higher than that in the beginning Interior of the high pressure accumulator 2 prevailing pressure (rail pressure).
  • a high injection pressure has a favorable effect on reducing the emissions of a self-igniting Internal combustion engine and the achievement of high specific performance. The inherent energy of the fuel is best implemented in this way.
  • the hydraulic chamber 31 may be the injection valve member 34 at the end face 35 applied, not too long connected to the low-pressure side return 8 stay.
  • the desired pilot injection quantity can be further determined by the axial length 21.1
  • Control section 21 can be influenced.
  • the axial length 21.1 of the further control section 21 is just dimensioned so that an overflow of fuel from the hydraulic space 31 via the connecting line 32 in the overflow 41 and from there via the control chamber 11 in the control line 26 is possible.
  • control section 19 and 20 can this may be another pilot injection or a longer main injection phase.
  • the main injection phase is terminated by either the first control edge 20 of the control section 19 opposite control edge between the fluid connection the mouths 25 and 24 of the lines 41 and 32 closes and this daduch interrupts or otherwise by deactivating the pressure booster. 5
  • the pressure in the nozzle chamber 28 is in the high-pressure reservoir 2 prevailing pressure level reduced.
  • the control chamber 11 of the pressure booster 5 separated from the low-pressure side return 8.
  • the throttle 12 provided in the throttle chamber 11 of the pressure booster fifth is effective.
  • rail pressure level builds up aut, since this is no longer on the control line 26 with the low-pressure side return. 8 communicates.
  • this is preferably designed as a 2/2-way valve Metering valve 6 placed in its closed position shown in Figure 1.
  • the pressure in the compression chamber 15, in the nozzle chamber 28 and in the hydraulic chamber 31 drops to rail pressure level from.
  • the injection valve member 34 is hydraulically balanced and is acted upon by the force acting on the end face 35 of the injection valve member 34 spring force
  • Spring element 34 is placed in its closed position and closes the injection openings 39 at the needle tip 37 of the injection valve member 34.
  • the piston 12 of the pressure booster 5 becomes effective the return spring 17, which acts on a stop 18 on the second partial piston 14, again returned to the starting position, wherein the compression chamber 15 by the of the Supply line 9 branching supply line 29 is refilled with fuel.
  • the hydraulic Room 31 is via the supply line 9, in which a pressure pulsations damping Check valve 43 may be included, the inlet 29 to the compression chamber 15th and the branching off this line with throttle point 30, refilled with fuel.
  • the check valve 43 can immediately behind the Mouth point in the high-pressure reservoir 2 or be arranged there. Instead of a check valve 43 may also be arranged there a throttle element. By the Check valve 43 or a throttle element arranged there are actuated the pressure booster 5 of the high-pressure accumulator 2 from the compression chamber 15, of the Lines 29 and 27 and separated from the nozzle chamber 28.
  • the proposed solution according to the invention combines a simply designed 2/2-way valve, which is designed as a metering valve 6, with a pressure booster piston part, on which the stroke direction of the partial piston seen several control sections are formed lying one behind the other.
  • a simply designed 2/2-way valve which is designed as a metering valve 6, with a pressure booster piston part, on which the stroke direction of the partial piston seen several control sections are formed lying one behind the other.
  • the use of a consuming and costly to be produced bypassed 3/2-way valve on the other hand can be easily pre-injection, main injection phases and Represents post-injections in the course of an injection molding.
  • a single metering valve 6 are used.
  • the control sections 19 and 21 in the lower region of the second Partial piston 12 of the pressure booster 5 can be easily produced.

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

Claims (16)

  1. Dispositif pour injecter du carburant dans une chambre de combustion (7) d'un moteur à combustion interne qui comprend une rampe d'accumulation haute pression (2), un démultiplicateur de pression (5) et une soupape de dosage (6), dans lequel le démultiplicateur de pression (5) comprend une chambre de travail (10) et une chambre de commande (11) séparées l'une de l'autre par un piston (12 ; 13, 14) mobile dans la direction axiale, et dont une variation de pression dans la chambre de commande (11) du démultiplicateur de pression (5) provoque une variation de la pression dans une chambre de compression (15) du démultiplicateur de pression (5), la chambre de compression (15) étant en liaison avec une chambre hydraulique (31) associée à un organe de soupape d'injection (34),
    caractérisé en ce que
    sur le piston (12 ; 13, 14) qui sollicite la chambre de compression (15) du démultiplicateur de pression (5), sont formés des segments de commande (19, 21) qui déchargent en pression la chambre hydraulique (31) de l'élément de soupape d'injection (34).
  2. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    la chambre hydraulique (31) est déchargée en pression pendant un temps bref.
  3. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    les segments de commande (19, 21) sont formés à la périphérie d'un piston partiel (13, 14) de l'unité de piston (12) l'un derrière l'autre dans la direction de la course de l'unité de piston (12).
  4. Dispositif pour injecter du carburant selon la revendication 2,
    caractérisé en ce qu'
    aù moins deux segments de commande (19, 21) sont formés à la périphérie du piston partiel (14) de l'unité de piston (12) qui sollicite la chambre de compression (15).
  5. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce qu'
    un conduit de transfert (41) communiquant avec la chambre de commande (11) du démultiplicateur de pression (5) débouche dans l'alésage dans lequel circule l'unité de piston (12).
  6. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    l'alésage dans lequel l'unité de piston (12) circule est en liaison avec la chambre hydraulique (31) par l'intermédiaire d'une conduite de liaison (32).
  7. Dispositif pour injecter du carburant selon les revendications 5 et 6,
    caractérisé en ce que
    le point de débouché (34) du conduit de transfert (41) et le point de branchement (25) de la conduite de liaison (32) sont disposés face à face dans la chambre de compression (15).
  8. Dispositif pour injecter du carburant selon la revendication 3,
    caractérisé en ce que
    les segments de commande (19, 21) sont séparés l'un de l'autre dans la direction axiale du second piston partiel (14) par une embase.
  9. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    celui des segments de commande (19, 21) qui est le plus proche de la chambre de compression (15) est constitué par une gorge annulaire.
  10. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    celui des segments de commande (19, 21) qui est le plus proche de la chambre de commande (11) du démultiplicateur de pression (5) est constitué par une chambre annulaire.
  11. Dispositif pour injecter du carburant selon les revendications 9 et 10,
    caractérisé en ce que
    vues dans la direction de la course de l'unité de piston (12 ; 13, 14), les longueurs axiales (19.1, 21.1) des segments de commande (19, 21) sont égales.
  12. Dispositif pour injecter du carburant selon les revendications 9 et 10,
    caractérisé en ce que
    vues dans la direction de la course de l'unité de piston (12 ; 13, 14), les longueurs axiales (19.1, 21.1) des segments de commande (19, 21) sont différentes.
  13. Dispositif pour injecter du carburant selon la revendication 6,
    caractérisé en ce qu'
    un conduit comprenant un étranglement (30) est branché en parallèle avec la conduite de liaison (32) entre la chambre de compression (15) et la chambre hydraulique (31).
  14. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    la chambre de commande (11) peut être déchargée de la pression vers le côté basse pression (8) par l'intermédiaire d'une conduite de commande (26) dans lequel une soupape 2/2 voies est intercalée en tant que soupape de dosage (6).
  15. Dispositif selon la revendication 1,
    caractérisé en ce que
    dans la conduite d'arrivée (9, 42, 29, 27) aboutissant à la chambre de travail (10), à la chambre de compression (15) et à la chambre de buse (28) est intercalé un clapet anti-retour (43) qui isole le segment à haute pression (15, 29, 27, 28) de la rampe d'accumulation haute pression (2) lors de l'activation du démultiplicateur de pression (5).
  16. Dispositif pour injecter du carburant selon la revendication 1,
    caractérisé en ce que
    l'unité de piston (12 ; 13, 14) du démultiplicateur de pression (5) comprend un premier piston partiel (13) qui comprend un étranglement (40) reliant la chambre de travail (10) à la chambre de commande (11) du démultiplicateur de pression, et les segments de commande (19, 21) sont formés sur un second piston partiel (14) de l'unité de piston (12) dont le côté frontal (23) sollicite la chambre de compression (15) du démultiplicateur de pression (5).
EP03720254A 2002-06-29 2003-04-03 Injecteur de carburant a multiplicateur de pression pour injection multiple Expired - Lifetime EP1520101B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10229412 2002-06-29
DE10229412A DE10229412A1 (de) 2002-06-29 2002-06-29 Kraftstoffinjektor mit Druckübersetzer für Mehrfacheinspritzung
PCT/DE2003/001097 WO2004003378A1 (fr) 2002-06-29 2003-04-03 Injecteur de carburant a multiplicateur de pression pour injection multiple

Publications (2)

Publication Number Publication Date
EP1520101A1 EP1520101A1 (fr) 2005-04-06
EP1520101B1 true EP1520101B1 (fr) 2005-11-02

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EP03720254A Expired - Lifetime EP1520101B1 (fr) 2002-06-29 2003-04-03 Injecteur de carburant a multiplicateur de pression pour injection multiple

Country Status (5)

Country Link
US (1) US6962141B2 (fr)
EP (1) EP1520101B1 (fr)
JP (1) JP2005531711A (fr)
DE (2) DE10229412A1 (fr)
WO (1) WO2004003378A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP3960283B2 (ja) * 2003-09-01 2007-08-15 トヨタ自動車株式会社 内燃機関の燃料噴射装置
JP4196869B2 (ja) * 2004-03-31 2008-12-17 三菱ふそうトラック・バス株式会社 燃料噴射装置
JP2005315195A (ja) * 2004-04-30 2005-11-10 Toyota Motor Corp 増圧コモンレール式燃料噴射装置の燃料噴射制御方法
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
DE102004053274A1 (de) * 2004-11-04 2006-05-11 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung
US7588012B2 (en) 2005-11-09 2009-09-15 Caterpillar Inc. Fuel system having variable injection pressure
US7472844B2 (en) * 2005-12-21 2009-01-06 Caterpillar Inc. Fuel injector nozzle with tip alignment apparatus
JP4935225B2 (ja) * 2006-07-28 2012-05-23 株式会社島津製作所 電子部品実装体
US7568632B2 (en) 2006-10-17 2009-08-04 Sturman Digital Systems, Llc Fuel injector with boosted needle closure
US20080296412A1 (en) * 2007-06-01 2008-12-04 Caterpillar Inc. Fuel injector having a flow passage insert
US20090057438A1 (en) * 2007-08-28 2009-03-05 Advanced Propulsion Technologies, Inc. Ultrasonically activated fuel injector needle
KR20100105849A (ko) 2007-12-19 2010-09-30 노보자임스 에이/에스 셀룰로오스 가수분해 향상 활성을 가지는 폴리펩티드 및 그것을 암호화하는 폴리뉴클레오티드
US20100096473A1 (en) * 2008-10-20 2010-04-22 Caterpillar Inc. Variable flow rate valve for mechnically actuated fuel injector
US8443780B2 (en) 2010-06-01 2013-05-21 Caterpillar Inc. Low leakage cam assisted common rail fuel system, fuel injector, and operating method therefor
EP2508746A1 (fr) * 2011-04-04 2012-10-10 Caterpillar Motoren GmbH & Co. KG Procédé et système de contrôle d'un taux d'injection d'un injecteur de carburant comportant un rail commun, système d'injection de carburant comportant un rail commun et injecteur de carburant
DE102012207842A1 (de) * 2012-05-10 2013-11-14 Continental Automotive Gmbh Einspritzventil
RU2545020C1 (ru) * 2014-04-28 2015-03-27 Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" Устройство для подачи топлива к форсунке теплового двигателя
DE102016105625B4 (de) * 2015-03-30 2020-10-08 Toyota Jidosha Kabushiki Kaisha Kraftstoffeinspritzvorrichtung für Brennkraftmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2885076B2 (ja) * 1994-07-08 1999-04-19 三菱自動車工業株式会社 蓄圧式燃料噴射装置
AU6245999A (en) * 1998-09-10 2000-04-03 International Truck And Engine Corporation Fuel injector
DE19939422A1 (de) 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE19952512A1 (de) * 1999-10-30 2001-05-10 Bosch Gmbh Robert Druckverstärker und Kraftstoffeinspritzsystem mit einem Druckverstärker
DE10124207A1 (de) * 2001-05-11 2002-11-21 Bosch Gmbh Robert Druckverstärker einer Kraftstoffeinspritzeinrichtung
DE10123914B4 (de) 2001-05-17 2005-10-20 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung mit Druckübersetzungseinrichtung und Druckübersetzungseinrichtung
DE10123911A1 (de) * 2001-05-17 2002-11-28 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung mit Druckübersetzungseinrichtung und Druckübersetzungseinrichtung
DE10126686A1 (de) * 2001-06-01 2002-12-19 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung mit Druckverstärker
DE10126685A1 (de) * 2001-06-01 2002-12-19 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung mit Druckverstärker
DE10229419A1 (de) * 2002-06-29 2004-01-29 Robert Bosch Gmbh Druckübersetzter Kraftstoffinjektor mit schnellem Druckabbau bei Einspritzende

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DE50301574D1 (de) 2005-12-08
WO2004003378A1 (fr) 2004-01-08
DE10229412A1 (de) 2004-01-29
US6962141B2 (en) 2005-11-08
JP2005531711A (ja) 2005-10-20
EP1520101A1 (fr) 2005-04-06
US20050103310A1 (en) 2005-05-19

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