EP1605157A1 - Injecteur de carburant doté d'un élément de soupape d'injection en plusieurs parties et d'un amplificateur de pression - Google Patents

Injecteur de carburant doté d'un élément de soupape d'injection en plusieurs parties et d'un amplificateur de pression Download PDF

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Publication number
EP1605157A1
EP1605157A1 EP05103066A EP05103066A EP1605157A1 EP 1605157 A1 EP1605157 A1 EP 1605157A1 EP 05103066 A EP05103066 A EP 05103066A EP 05103066 A EP05103066 A EP 05103066A EP 1605157 A1 EP1605157 A1 EP 1605157A1
Authority
EP
European Patent Office
Prior art keywords
pressure
chamber
fuel injector
needle part
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.)
Withdrawn
Application number
EP05103066A
Other languages
German (de)
English (en)
Inventor
Michael Kurz
Martin Kropp
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 EP1605157A1 publication Critical patent/EP1605157A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—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
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0049—Combined valve units, e.g. for controlling pumping chamber and injection valve
    • 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
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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

  • 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 second cavity, wherein the first surface of the armature assigns to the stator.
  • It is a Valve provided, which is connected to the armature.
  • the valve is able to out To pass a hydraulic actuating fluid to the injection device to a sump.
  • One Attenuation fluid may be there with respect to one of the cavities of the solenoid assembly be collected or be discharged from there again.
  • the fuel injection valve for internal combustion engines comprises a housing in which in one Bore a longitudinally displaceable outer valve needle and in turn this longitudinally slidable inner valve needle are arranged. These control with their combustion chamber side End ever at least one injection port. Furthermore, a control room is provided, the is connected via an inlet throttle with a high-pressure chamber and by the pressure at least indirectly a closing force is exerted on the outer valve needle. Further is a control pressure chamber provided by the pressure at least indirectly a closing force is exerted on the inner valve needle; Furthermore, a leakage oil space is provided in the always a low fuel pressure prevails.
  • a control valve is arranged, the one Valve chamber and a valve member disposed therein, wherein the valve space a Connection to the leakage oil chamber, an always open connection to the control room and a connection having the control pressure chamber.
  • the valve member is in the valve space between two End positions movable, wherein in the first end position the connection to the leakage oil space closed and opened the connection to the control pressure chamber and in the second end position closed the connection to the control pressure chamber and the connection to the leakage oil chamber is open.
  • the device for injecting fuel comprises a Fuel injector, which via a high-pressure shaft with high-pressure fuel can be acted upon and actuated via a metering valve.
  • the injection valve member is a assigned by these independently movable damping element, which has a damping chamber limited.
  • the damping element has at least one overflow channel to Connection of the damping chamber with another hydraulic space.
  • Fuel injectors comprising a multi-part injection valve member can be the opening pressure of the internal injection valve member part, for example, spring assist to a constant level or with the help of an additional assistant pressure (like e.g.
  • a control of a fuel injector which contains a pressure booster, in the context of a high-pressure system for injection provided by fuel, which is the use of a multi-part Injection valve member for improving emissions with an active or passive switchable Injector valve member permitted.
  • the inventive solution is achievable that a internally arranged nozzle needle-shaped part of the multi-part injection valve member only opens at full load and in partial load operation of the internal combustion engine Injection of fuel into the combustion chamber of the internal combustion engine only over that external part of the nozzle needle formed injection valve member is made.
  • the proposed solution also allows very short drive times of the internal Part of the multi-part injection valve member, which in turn short injection periods allows full-load operation of the self-igniting internal combustion engine.
  • the internal combustion engine In the partial load range the internal combustion engine, however, can be an injection with small Nozzle flow, d. H. with only one open row of holes in the combustion chamber over any take long injection durations without opening another, second row of holes.
  • opened first row of holes can be a small nozzle flow and a corresponding injection course shaping can be achieved while at a large Nozzle flow, given by the open first row of holes and the opened second Hole row an injection course shaping in the full load range of the self-igniting internal combustion engine can be achieved.
  • FIG. 1 an embodiment variant already known from the prior art is shown a fuel injector illustrated by its hydraulic circuit diagram.
  • a shown in Fig. 1 fuel injector 3 is a high-pressure accumulator 1 (common rail) supplied with high pressure fuel.
  • the high-pressure accumulator 1 is via a high-pressure pump, which compresses the fuel and the high-pressure accumulator 1 supplies, fueled.
  • the in the high-pressure accumulator 1, (common rail) prevailing fuel pressure is thus at each fuel injector 3 of the internal combustion engine to disposal.
  • the fuel injector 3 comprises a control valve 32, a Pressure booster 4 and an injection valve member 18, which may be designed in several parts.
  • the pressure booster 4 is formed as axially displaceable stepped piston 9, wherein the Stepped piston 9 a acted upon via a high-pressure line 5 working space 6 of a pressure loadable differential pressure chamber 7 (back space) separates.
  • the stepped piston 9 is acted upon by a return spring 8, which the stepped piston 9 in its upper position emotional.
  • the stepped piston 9 acts upon pressure relief of the differential pressure chamber. 7 a compression chamber 10.
  • the control valve 32 In the idle state of the pressure booster 4 is the control valve 32 not activated, no injection takes place. In this case, it is located in the high-pressure accumulator 1 stored system pressure via the high pressure line 5, which is a throttle or may have a check valve 2, in the working space 6 of the pressure booster 4 at.
  • the system pressure is applied to the control valve 32 via a high-pressure branch 34.
  • the likewise pressurized with system pressure control line 11 prevails system pressure also in the differential pressure chamber 7.
  • the differential pressure chamber 7 via a connecting line is connected to a pressure chamber 12, in which a first spring element 20 and a second spring element 21 are received, there is also in the pressure chamber 12th System pressure.
  • About a filling line 14 and an open refill valve 15 is System pressure in the compression chamber 10 and the high pressure line 16 in the nozzle chamber 17 of the fuel injector 3 as shown in Fig. 1 at. This means you are at rest the pressure booster 4, the hydraulic chambers on the pressure booster 4 with system pressure acted upon, so that the stepped piston 9 is pressure balanced. In this condition is the stepped piston 9 via the arranged in the differential pressure chamber 7 (back space) Restored spring 8 applied.
  • the multipart injection valve member 18 includes a first, external needle part 18.1 and a second needle part 18.2, which is arranged on the inside and within the first needle part 18.1 is guided.
  • Each of the two needle parts 18.1 or 18.2 is arranged in the pressure chamber 12
  • Associated spring element 20 and 21, respectively on the end faces of the first needle part 18.1 and the second needle part 18.2 act in the closing direction. Due to the effect the two spring elements 20 and 21 in the closing direction, the can in the nozzle chamber 17 pending, and at a pressure stage 25 of the first needle portion 18.1 attacking system pressure, the first needle part 18.1 not open. Only when the pressure in the nozzle chamber 17 via the system pressure rises, which is achieved by activating the pressure booster 4, opens the first needle portion 18.1 of the multi-part injection valve member 18 against the effect of this acting on its end face first spring element 20th
  • the metering of the fuel is carried out by pressure relief of the differential pressure chamber. 7 of the pressure booster 4. If the control valve 32 is actuated, which is the differential pressure chamber 7 (working space) with a pressure-side return 33 connecting control line 11 released and separated from the high pressure line 5. As a result, the pressure drops in the Differential pressure chamber 7 (working space) from, whereby the pressure around the compression space 10th rises due to the retracting in this stepped piston 9. As a result, over the High pressure line 16 and the pressure in the nozzle chamber 17. This increases in the opening direction the first needle part 18.1 at the compression stage 25 acting pressure force and the first needle part 18.1 opens. When opening a first row of holes 26 is released, so that at the combustion chamber end of the fuel injector 3 via this fuel in the Combustion chamber of the self-igniting internal combustion engine can be injected.
  • the pressure booster 4 remains activated and compresses the fuel in the compression chamber 10.
  • the pressure chamber 12 remains pressure relieved.
  • At the top of the combustion chamber of the second needle part 18.2 is now also on injection pressure level.
  • the injection pressure is above the opening pressure of the second needle part 18.2, both needle parts 18.1 and 18.2 are opened, so that an injection of Fuel in the combustion chamber of the self-igniting internal combustion engine both over the first row of holes 26 as well as the second row of holes 27 can be made.
  • Needle parts 18.1 and 18.2 of the multipart injection valve member can circulating grooves Be provided 28 and 29, and a bore 30 in the first needle part 18.1, so that the leakage are passed directly into a low-pressure side return 31 can.
  • Fig. 2 is a first embodiment of the proposed solution according to the invention a fuel injector with pressure booster and multi-part injection valve member refer to.
  • FIG. 2 shows that the fuel injector shown there 3 is controlled via a servo valve 40, which in turn via the control valve 32nd is pressed.
  • the High-pressure line 5 in which a throttle point or a check valve 2 may be included can, to the working space 6 of the pressure booster 4 of the fuel injector 3.
  • the return spring 8 is - in contrast to the illustration of FIG. 1 - according to this embodiment recorded in the working space 6.
  • the working space 6 and the differential pressure space 7 (working space) the pressure booster 4 are separated from each other by the stepped piston 9, the the compression space 10 is applied.
  • From the compression chamber 10 extends from High-pressure line 16 to the pressure chamber 12, which is the multipart injection valve member encloses.
  • the multi-part injection valve member 18 comprises a first, outer needle part 18.1 and guided in this, the second inner needle part 18.2.
  • a damper chamber 42 above the multi-part injection valve member 18 falls due to the outflow of fuel through the damper chamber throttle 48 in the pressure-relieved control line 11, the pressure, so that the damper chamber 42 limiting control piston 49 moves against the first spring element 20 acting on this upward.
  • the second spring element 21 which is provided in the spring chamber 44, although relieved, but the spring force is still large enough to hold the second needle part 18.2 in his seat 23. This results from the fact that no pressure surface A 1 (see illustration according to FIG.
  • the stopper 50 shifts for the internally arranged second Needle part 18.2 also upwards, so now fuel through the two, for example formed as concentric hole circles rows of holes 26 and 27 in the combustion chamber the self-igniting internal combustion engine can be injected.
  • Fig. 2 embodiment of the present invention proposed Solution is an exact opening time of the inner, second needle part 18.2 guaranteed, because the pressure gradient of the increasing system pressure is very steep.
  • the opening of the outer first needle portion 18.1 and the opening of the inner second needle part 18.2 of a multi-part injection valve member is the injection of small quantities over the first row of holes 26 on the combustion chamber side end of the fuel injector 3, e.g. in the context of pilot injections possible.
  • FIG. 3 is a further embodiment of the invention proposed fuel injector with pressure booster and multipart trained injection valve refer to.
  • the check valve 47 which the control chamber 43 for the second needle part 18.2 is assigned, from the high pressure area in the low pressure area relocated.
  • the attachment point of the check valve 47 for the control chamber 43 for the second needle part 18.2 is not in this embodiment to the high-pressure line 16, but to the control line 11 for pressure relief of the differential pressure chamber 7 (back space) integrated pressure intensifier 4.
  • the inner, second needle part 18.2 of the multipart injection valve member 18 is therefore no longer in front of the pressure relief of the control line 11 its seat 23, resulting in that immediately after lifting the needle tip of the outer first needle part 18.1, the cross sections of both rows of holes 26 and 27 on the combustion chamber side end of the fuel injector 3 are released, so that the injection of fuel into the combustion chamber of the self-igniting internal combustion engine both concentrically to each other trainable rows of holes 26 and 27 can be made.
  • the throttle 45 in the upper region of the second needle part 18.2 the hydraulic Room 54 and the spring chamber 44 connects to each other, is with a very small throttle cross-section designed.
  • the prevailing pressure in the hydraulic chamber 54 pressure level be kept as long as possible so that the inner, second needle part 18.2 acting spring force of the second spring element 21 is overcome.
  • Within of 720 ° KW of the internal combustion engine should prevail in the hydraulic space 54 Pressure level to be reduced.
  • FIG. 4 The illustration according to FIG. 4 is a further, third embodiment of the invention to be taken from the proposed solution.
  • the embodiment differs from that shown in Figures 2 and 3 embodiments according to the invention characterized in that on the one hand the check valve 47, which is assigned to the control chamber 43 for the second needle part 18.2, to the control line 11 for pressure relief of the differential pressure chamber (working space) of the pressure booster 4 is connected and that in the check valve 47 further another check valve in opposite directions and in the second check valve 71 acting line a throttle point 72 is formed.
  • Fuel injector with pressure booster 4 and multipart trained injection valve member 11 is the spring force of the inner, second needle part 18.2 acting second Design spring element 21 slightly higher. Due to the closed check valve 47 is to ensure that in the control chamber 43 for the second needle part 18.2 still prevailing Residual pressure level with closed impact valve 47 in the control line 11 still can be overcome to the inner, second needle part 18.2 in his seat 23rd to move the combustion chamber side end of the fuel injector 3.
EP05103066A 2004-06-11 2005-04-18 Injecteur de carburant doté d'un élément de soupape d'injection en plusieurs parties et d'un amplificateur de pression Withdrawn EP1605157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004028521A DE102004028521A1 (de) 2004-06-11 2004-06-11 Kraftstoffinjektor mit mehrteiligem Einspritzventilglied und mit Druckverstärker
DE102004028521 2004-06-11

Publications (1)

Publication Number Publication Date
EP1605157A1 true EP1605157A1 (fr) 2005-12-14

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Application Number Title Priority Date Filing Date
EP05103066A Withdrawn EP1605157A1 (fr) 2004-06-11 2005-04-18 Injecteur de carburant doté d'un élément de soupape d'injection en plusieurs parties et d'un amplificateur de pression

Country Status (3)

Country Link
US (1) US20050274828A1 (fr)
EP (1) EP1605157A1 (fr)
DE (1) DE102004028521A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1593840A3 (fr) * 2004-05-06 2006-06-07 Robert Bosch Gmbh Procédé et dispositif pour la mise en forme de la pression d'injection d'un injecteur de carburant
EP1898081A1 (fr) * 2006-08-22 2008-03-12 Volkswagen Aktiengesellschaft Dispositif d'injection de carburant

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DE10122241A1 (de) * 2001-05-08 2002-12-05 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004017305A1 (de) * 2004-04-08 2005-10-27 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln
JP4305394B2 (ja) * 2005-01-25 2009-07-29 株式会社デンソー 内燃機関用燃料噴射装置
KR101058713B1 (ko) * 2010-03-08 2011-08-22 현대중공업 주식회사 솔레노이드밸브와 셔틀밸브를 가진 디젤엔진용 2단 연료분사밸브
DE102010039048A1 (de) * 2010-08-09 2012-02-09 Robert Bosch Gmbh Einspritzvorrichtung
US9157384B2 (en) * 2013-01-15 2015-10-13 Caterpillar Inc. In-cylinder dynamic gas blending fuel injector and dual fuel engine
AT516250B1 (de) * 2015-01-07 2016-04-15 Hoerbiger Kompressortech Hold Brenngaszuführungs- und Zündvorrichtung für einen Gasmotor
AT516251B1 (de) * 2015-01-07 2016-04-15 Hoerbiger Kompressortech Hold Brenngaszuführungs- und Zündvorrichtung für einen Gasmotor
EP3362670B1 (fr) * 2015-10-15 2020-02-19 Vitesco Technologies GmbH Soupape d'injection de carburant avec un dispositif anti-rebond, moteur à combustion et véhicule
US11220980B2 (en) * 2019-05-16 2022-01-11 Caterpillar Inc. Fuel system having isolation valves between fuel injectors and common drain conduit

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US4984738A (en) * 1985-09-18 1991-01-15 Association Of American Railroads Unit injector for staged injection
EP0562046B1 (fr) 1991-10-11 1996-09-04 Caterpillar Inc. Ensemble actionneur et soupape amorti pour injecteur a commande electronique
US20030116660A1 (en) * 2001-12-20 2003-06-26 Caterpillar, Inc. Nozzle insert for dual mode fuel injector
WO2003054374A1 (fr) * 2001-12-20 2003-07-03 Robert Bosch Gmbh Dispositif d'injection de carburant pour moteurs a combustion interne
EP1344929A1 (fr) * 2002-03-13 2003-09-17 Robert Bosch Gmbh Injecteur de combustible pour moteurs à combustion interne
WO2004003373A1 (fr) * 2002-06-29 2004-01-08 Robert Bosch Gmbh Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur
DE10222106A1 (de) 2002-05-17 2004-01-22 Fico Cables, S.A., Rubi Pedalsicherheitssystem
DE10229415A1 (de) 2002-06-29 2004-01-29 Robert Bosch Gmbh Einrichtung zur Nadelhubdämpfung an druckgesteuerten Kraftstoffinjektoren
US20040055562A1 (en) * 2002-09-25 2004-03-25 Chris Stewart Mixed mode fuel injector with individually moveable needle valve members

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DE10229418A1 (de) * 2002-06-29 2004-01-29 Robert Bosch Gmbh Einrichtung zur Dämpfung des Nadelhubes an Kraftstoffinjektoren
DE10229412A1 (de) * 2002-06-29 2004-01-29 Robert Bosch Gmbh Kraftstoffinjektor mit Druckübersetzer für Mehrfacheinspritzung
US6843434B2 (en) * 2003-02-28 2005-01-18 Caterpillar Inc Dual mode fuel injector with one piece needle valve member
DE10315015B4 (de) * 2003-04-02 2005-12-15 Robert Bosch Gmbh Kraftstoffinjektor mit Druckverstärker und Servoventil mit optimierter Steuermenge
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DE102004010760A1 (de) * 2004-03-05 2005-09-22 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit Nadelhubdämpfung
DE102004017305A1 (de) * 2004-04-08 2005-10-27 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln
DE102004022267A1 (de) * 2004-05-06 2005-12-01 Robert Bosch Gmbh Verfahren und Vorrichtung zur Formung des Einspritzdruckes an einem Kraftstoffinjektor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4984738A (en) * 1985-09-18 1991-01-15 Association Of American Railroads Unit injector for staged injection
EP0562046B1 (fr) 1991-10-11 1996-09-04 Caterpillar Inc. Ensemble actionneur et soupape amorti pour injecteur a commande electronique
US20030116660A1 (en) * 2001-12-20 2003-06-26 Caterpillar, Inc. Nozzle insert for dual mode fuel injector
WO2003054374A1 (fr) * 2001-12-20 2003-07-03 Robert Bosch Gmbh Dispositif d'injection de carburant pour moteurs a combustion interne
EP1344929A1 (fr) * 2002-03-13 2003-09-17 Robert Bosch Gmbh Injecteur de combustible pour moteurs à combustion interne
DE10222106A1 (de) 2002-05-17 2004-01-22 Fico Cables, S.A., Rubi Pedalsicherheitssystem
WO2004003373A1 (fr) * 2002-06-29 2004-01-08 Robert Bosch Gmbh Commande d'un multiplicateur de pression par le mouvement d'un element d'injecteur
DE10229415A1 (de) 2002-06-29 2004-01-29 Robert Bosch Gmbh Einrichtung zur Nadelhubdämpfung an druckgesteuerten Kraftstoffinjektoren
US20040055562A1 (en) * 2002-09-25 2004-03-25 Chris Stewart Mixed mode fuel injector with individually moveable needle valve members

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1593840A3 (fr) * 2004-05-06 2006-06-07 Robert Bosch Gmbh Procédé et dispositif pour la mise en forme de la pression d'injection d'un injecteur de carburant
US7182070B2 (en) 2004-05-06 2007-02-27 Robert Bosch Gmbh Method and device for shaping the injection pressure in a fuel injector
EP1898081A1 (fr) * 2006-08-22 2008-03-12 Volkswagen Aktiengesellschaft Dispositif d'injection de carburant

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US20050274828A1 (en) 2005-12-15
DE102004028521A1 (de) 2005-12-29

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