EP1584813A2 - Injecteur pour moteur à combustion avec une aiguille d'injection contrôlée directement - Google Patents

Injecteur pour moteur à combustion avec une aiguille d'injection contrôlée directement Download PDF

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Publication number
EP1584813A2
EP1584813A2 EP05100668A EP05100668A EP1584813A2 EP 1584813 A2 EP1584813 A2 EP 1584813A2 EP 05100668 A EP05100668 A EP 05100668A EP 05100668 A EP05100668 A EP 05100668A EP 1584813 A2 EP1584813 A2 EP 1584813A2
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
pressure
chamber
control
outer nozzle
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Withdrawn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
EP05100668A
Other languages
German (de)
English (en)
Other versions
EP1584813A3 (fr
Inventor
Achim Brenk
Martin Kropp
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 EP1584813A2 publication Critical patent/EP1584813A2/fr
Publication of EP1584813A3 publication Critical patent/EP1584813A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
    • 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0043—Two-way valves
    • 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
    • F02M63/0045—Three-way valves

Definitions

  • the invention relates to a fuel injection device for internal combustion engines the preamble of claim 1.
  • a fuel injector with two rows of injector nozzles with internal and external fuel injectors coaxial with an outer nozzle needle is assigned, for example, from DE 102 05 970 A1 known.
  • Such injection nozzles, the pressure-dependent controlled release different injection cross sections are also referred to as Vario nozzles.
  • the outer and inner nozzle needle is each assigned a control piston, respectively acting on a fuel-filled hydraulic space, so that the hydraulic Rooms act as actively connected control rooms.
  • the two control rooms are over one Connecting channel hydraulically connected.
  • the control room of the outer Nozzle needle is via an outlet throttle with a low-pressure return system connectable.
  • the connecting channel is dimensioned so that when opening the Outflow throttle first, the pressure in the control chamber of the outer nozzle needle drops and only with a time delay, the pressure in the control chamber of the inner nozzle needle.
  • a fuel injection device with Pressure booster known, in addition to improving the Injection characteristic and to increase the efficiency also a Variodüse is inserted with an inner and an outer nozzle needles. It is the Opening pressure of the inner nozzle needle by spring support to a constant level or with the help of an additional assistant pressure on a certain ratio of Rail pressure and opening pressure set. This is an adaptation of the hydraulic Flow through the fuel injector to the load point of the internal combustion engine possible.
  • the inner nozzle needle is adjusted so that they only at relatively high Pressing, for example, greater than 1500 bar opens, thus good emission levels in Partial load condition of the internal combustion engine to achieve.
  • the setting of the constant Opening pressure for the inner nozzle needle is very sensitive to tolerances, as with the Opening of the inner nozzle needle is accompanied by a jump in quantity in the injection quantity. In this respect, specimen spreads are particularly unpleasant.
  • the opening pressure of the inner nozzle needle on the constant Reaching the ratio of assist pressure and nozzle pressure opens the inner Nozzle needle even at partial load of the internal combustion engine.
  • Object of the present invention is the adaptability of Fuel injection device to the operating points of the internal combustion engine continues to improve and meet the requirement for a homogeneous combustion process.
  • the fuel injection device with the characterizing Features of claim 1 has the advantage that an improved adaptation of the Injection time and the injection volume to the operating point of Internal combustion engine is possible. It is to control the outer nozzle needle a first switching valve and for driving the inner nozzle needle, a second switching valve intended.
  • the first switching valve is a closing space for the outer Nozzle needle connectable to a low pressure / return system.
  • To control the inner nozzle needle is assigned to the inner nozzle needle control chamber by means of second switching valve with the low-pressure / return system connectable, so that a Pressure relief of the control room is done.
  • This control concept can be particularly useful in so-called leak-oilless Insert injector, in which for the inner injectors a separate Fuel supply is provided.
  • the separate fuel supply leads from a the outer nozzle needle associated nozzle chamber to one of the inner injection nozzle upstream pressure shoulder on the inner nozzle needle.
  • the separate fuel supply line is expediently as a gap between the inner nozzle needle and formed the outer nozzle needle.
  • a quick closing of the outer nozzle needle is achieved when, within a closing space between the end face of the outer nozzle needle and an associated damping piston a parting line is formed and in addition a hydraulic connection between the damping chamber and closing room exists.
  • the fuel injectors illustrated in FIGS. 1 to 4 include one Fuel injector 1 and a high-pressure accumulator 2 (common rail), wherein the Fuel injector 1 via the high-pressure accumulator 2 with high pressure standing Fuel is supplied.
  • the fuel injector 1 includes a pressure intensifier 5, a Servo valve 6 and an injection valve 9, via which in a not shown Combustion chamber of an internal combustion engine at the combustion chamber end of the fuel injected becomes.
  • the servo valve 6, which is designed for example as a 3/2-way valve, has a first switching valve 7 and a controlled by this control valve 8.
  • the Switching valve 7 is in the present embodiment of an electromagnet actuated. However, the electromagnet can also be replaced by a piezo actuator.
  • the servo valve 6 can also be a directly controlled Solenoid valve or a pressure compensated 3/2-way valve with piezo actuator used become.
  • the injection valve 9 has a Variodüse with an outer nozzle needle 11 and an inner nozzle needle 12.
  • the nozzle needles 11, 12 are coaxial with each other guided and independently longitudinally displaceable.
  • the vario nozzle has two Hole rows of injectors with outer injectors 13 and inner Injection nozzles 14, wherein the outer nozzle needle 11 to the outer injection nozzles 13th and the inner nozzle needle 12 are associated with the inner injection nozzles 14.
  • the outer one Nozzle needle 11 has a pressure shoulder 16 within a nozzle chamber 15. On the combustion chamber side, the inner nozzle needle 12 with a further pressure shoulder 18th executed, which is the internal injection nozzles 14 upstream.
  • outer nozzle needle 11 In the combustion chamber opposite side of the outer nozzle needle 11 is associated with a closing space 20, in which the outer nozzle needle 11 with a closing space side acting in the closing direction Pressure surface 21 is located.
  • the outer nozzle needle 11 is further a damping piston 41st associated, which is guided in a subsequent to the closing space 20 bore 42 is.
  • the damping piston 41 is biased by a closing spring 44 in the closing space 20 and has within the closing space 20 a nozzle needle-side end face 47, the the closing space side pressure surface 21 of the outer nozzle needle 11 is present. Between the Nozzle-side end face 47 of the damping piston 41 and the pressure surface 21 of the outer nozzle needle 11 is a parting line 45 is formed.
  • the damping piston 41 also shows me a trained as an annular end surface pressure surface 49 in a damping chamber 50.
  • the inner nozzle needle 12 is connected to a control piston 43, in the form of a Piston rod is guided through the damping piston 41 therethrough. Between the Control piston 43 and the inner cylinder wall of the damping piston 41, is in the Embodiments of Figures 1 to 3, a flow channel 46 in the form of a Annular gap performed that leads from the damping chamber 50 to the parting line 45.
  • the as Piston rod executed control piston 43 for the inner nozzle needle 12 passes through the Control chamber 50 through and has a control room side pressure surface 52 in one Control chamber 53.
  • the inner nozzle needle 12 also has at the transition to Control piston 43 in the closing direction of the inner nozzle needle 12 facing step 22nd as supporting the closing operation of the inner nozzle needle Pressure shoulder acts.
  • the pressure booster 5 includes in addition to the mentioned pressure chamber 25 a back space 26 and a high-pressure chamber 27.
  • an axially displaceable stepped piston 30 is received, the a first partial piston 31 which, in comparison to a second partial piston 32 with a guide permitting larger diameter is formed.
  • the Stepped piston 30 can consist of two separate components as well as one Be manufactured component.
  • the stepped piston 30 also has a in the pressure chamber 25th protruding piston rod 33 with spring holder 34 for a closing spring 35.
  • the Nozzle chamber 15 of the injection valve 9 with fuel under very high pressure applied From the rear space 26 of the booster 5 branches a first control line 28 and a second control line 29 from, wherein the first control line 28 to the Control valve 8 and the second control line via a closing space throttle 54 to the Closing chamber 20 of the injection valve 9 is connected.
  • the closing space 20 is above a Check valve 55 also connected to the high pressure line 36.
  • the control room 50 is connected via an outlet throttle 56 to the second line 29.
  • Another Line 57 leads from the pressure chamber 25 in the control chamber 53, wherein in the line 57 a another throttle 58 is connected.
  • the control valve 8 is designed with a control piston 81 having a pressure surface a control valve-side control chamber 82 limited.
  • the control piston 81 is a Connecting channel 83 incorporated, the pressure chamber 25 via a throttle 84 with the Control room 82 connects.
  • On the control piston 81 is a sealing seat 78 and a control edge 85 trained.
  • the sealing seat 78 separates a low-pressure space 86 which is connected to a Return line 87 is connected, from a valve chamber 89.
  • the return line 87 is connected to a low pressure return system 88.
  • the control edge 86 separates the valve chamber 89 into which the line 28 opens, from the pressure chamber 25th
  • the switching valve 7 has an actuator-side control chamber 73 and an actuator side Low pressure space 75, wherein the control chamber 73 via a control line 76 with the control valve-side control chamber 82 and the low-pressure chamber 75 via another Return line 77 is connected to the low pressure / return system 88.
  • the fuel injector 1 further has a second switching valve 90, the one Control piston 91 having an actuator-side pressure chamber 92 of a Low pressure space 93 separates. From the pressure chamber 92, a control line 94 leads to Control chamber 53. At the low pressure chamber 93 is another return line 95th connected, which also leads into the low pressure / reflux system 88.
  • the second switching valve 90 is also an arrangement at the top of the Fuel injector 1 conceivable.
  • As a simplification is also an arrangement outside the fuel injector 1 possible, in which case the switching valve 90 centrally for all Cylinder an internal combustion engine can act.
  • the application is here by the number of cylinders and the injections required, because after each Activation of the inner nozzle needle 12 is a break in all cylinders in order to avoid uncontrolled opening of the inner injection nozzles 14.
  • a Such embodiment has significant space advantages at the fuel injector. 1 However, an additional hydraulic connection for the fuel injector 1 be provided.
  • An external switching valve 90 must also have a sufficient Have dynamics to realize activation in a break in the spray.
  • the second switching valve 90 can be executed as a low-pressure switching valve. at all variants are the injection nozzles 13, 14 and the damping chamber 50 pressurized. To prevent leakage through the guides between the inner and the To avoid outer nozzle needle 11, 12, the measures known per se are too choose how double needle seat on the outer nozzle needle 11 or an additional Leakage removal between the nozzle needles 11, 12th
  • control chamber 53 for the inner nozzle needle 12 is not with the Pressure chamber 25 of the booster 5 is connected, but via a check valve 97th connected to the control line 29.
  • the check valve 97 acts against the Emptying direction from the control chamber 53, so that the check valve 97th only a filling of the control chamber 53 can be made from the control line 29.
  • the Opening of the inner nozzle needle 12 takes place by driving the second Switching valve 90, as described in connection with Figure 1.
  • the embodiment in Figure 3 shows a fuel injector 1 with a Injection valve 10, which has a Variodüse, wherein the inner injection nozzles 14 of the Fuel is supplied via a separate fuel supply 101.
  • the separate Fuel supply is, for example, as a gap or as an annular gap between the inner nozzle needle 12 and the outer nozzle needle 11 realized.
  • Connecting passage 102 for example, radially guided by the outer nozzle needle 11, the connects the nozzle chamber 15 with the fuel supply 101, so that at the combustion chamber-side pressure shoulder 18 of the inner nozzle needle 12 also in the Nozzle chamber 15 prevailing injection pressure is applied.
  • This version becomes one known leak oil-free Variodüse realized in the on the outer nozzle needle 11 a not shown double seat is designed as a combustion chamber-side sealing seat.
  • the Activation of the outer nozzle needle 11 is here as well - as in the Embodiments 1 and 2 described - by means of the first switching valve 7 under Intermediate circuit of the pressure booster 5 initiated. Again, this is Open the outer nozzle needle 11 is damped by means of the damping piston 41.
  • Embodiment in Figure 3 is the control chamber 53 via a hydraulic connection 104 connected to a throttle 105 with the high pressure line 36.
  • a connection via the check valve 55 to Closing space 20 is formed.
  • the control chamber 53 coupled via the closing space 20 to the rail pressure.
  • the second switching valve 90 By additionally activating the second switching valve 90, the row of holes of the inner injection nozzles 14 can be arbitrary be switched on and off.
  • This embodiment allows over the separate fuel supply for the inner injectors 14 a stroke-controlled Injection without interposition of the pressure booster 5 with rail pressure can be done by a separate control of the inner nozzle needle 12. This allows small spray clearances and good multiple injection due to lower Pressure oscillations.
  • In combination with a low inclination of the holes for the Injectors 14 can be an early injection with a homogeneous combustion to reach.
  • the embodiment according to FIG. 4 also uses an injection valve 100 a leak-free Vario nozzle.
  • the inner injectors 14 a separate fuel supply 101 between the inner and the outer nozzle needle 11, 12 and via a connecting channel 102 available.
  • the control chamber 53 is not with the High-pressure line 36 connected, but - as in the embodiments according to Figure 1 and 2 - via the line 57 and the throttle 58 to the pressure chamber 25 of Pressure booster 5 connected.
  • Embodiment of the leak-less Variodüse in Figure 3 is also no hydraulic connection between the damping chamber 50 and the closing space 20th available.

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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)
EP05100668A 2004-04-08 2005-02-01 Injecteur pour moteur à combustion avec une aiguille d'injection contrôlée directement Withdrawn EP1584813A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004017305 2004-04-08
DE102004017305A DE102004017305A1 (de) 2004-04-08 2004-04-08 Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln

Publications (2)

Publication Number Publication Date
EP1584813A2 true EP1584813A2 (fr) 2005-10-12
EP1584813A3 EP1584813A3 (fr) 2006-03-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05100668A Withdrawn EP1584813A3 (fr) 2004-04-08 2005-02-01 Injecteur pour moteur à combustion avec une aiguille d'injection contrôlée directement

Country Status (3)

Country Link
US (1) US20050224600A1 (fr)
EP (1) EP1584813A3 (fr)
DE (1) DE102004017305A1 (fr)

Cited By (7)

* 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
WO2008087052A1 (fr) 2007-01-18 2008-07-24 Robert Bosch Gmbh Injecteur de carburant avec surpresseur intégré
EP1795736A3 (fr) * 2005-12-12 2009-03-25 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur de combustion interne
WO2009080414A1 (fr) * 2007-12-21 2009-07-02 Robert Bosch Gmbh Injecteur d'un système d'injection de carburant comprenant une soupape de commande à 3/2 voies
EP1865189A3 (fr) * 2006-06-07 2009-10-28 Robert Bosch Gmbh Injecteur de carburant doté d'un actionnement piézo-électrique installé du côté basse pression
WO2018082855A1 (fr) * 2016-11-03 2018-05-11 Robert Bosch Gmbh Injecteur de carburant pour injecter un carburant gazeux et/ou liquide
CN108291519A (zh) * 2015-10-27 2018-07-17 德尔福知识产权有限公司 燃料喷射器的控制阀装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010760A1 (de) * 2004-03-05 2005-09-22 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit Nadelhubdämpfung
DE102004028521A1 (de) * 2004-06-11 2005-12-29 Robert Bosch Gmbh Kraftstoffinjektor mit mehrteiligem Einspritzventilglied und mit Druckverstärker
JP4075894B2 (ja) * 2004-09-24 2008-04-16 トヨタ自動車株式会社 燃料噴射装置
US8100110B2 (en) * 2005-12-22 2012-01-24 Caterpillar Inc. Fuel injector with selectable intensification
EP2410168A1 (fr) * 2010-07-23 2012-01-25 Wärtsilä Schweiz AG Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide
GB201309118D0 (en) * 2013-05-21 2013-07-03 Delphi Tech Holding Sarl Fuel Injector
DK179161B1 (en) * 2016-05-26 2017-12-18 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland A large two-stroke compression-ignited internal combustion engine with fuel injection system for low flashpoint fuel and a fuel valve therefore
US10119507B1 (en) * 2017-07-17 2018-11-06 GM Global Technology Operations LLC Rotating fuel injector assembly
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US20050224600A1 (en) 2005-10-13
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