EP1554488B1 - Dispositif d'injection de carburant a pression multipliee, pourvu d'une conduite de commande interne - Google Patents

Dispositif d'injection de carburant a pression multipliee, pourvu d'une conduite de commande interne Download PDF

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Publication number
EP1554488B1
EP1554488B1 EP03770904A EP03770904A EP1554488B1 EP 1554488 B1 EP1554488 B1 EP 1554488B1 EP 03770904 A EP03770904 A EP 03770904A EP 03770904 A EP03770904 A EP 03770904A EP 1554488 B1 EP1554488 B1 EP 1554488B1
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EP
European Patent Office
Prior art keywords
pressure
chamber
piston
pressure booster
fuel injection
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
EP03770904A
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German (de)
English (en)
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EP1554488A1 (fr
Inventor
Hans-Christoph Magel
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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
    • F02M57/026—Construction details of pressure amplifiers, e.g. fuel passages or check valves arranged in the intensifier piston or head, particular diameter relationships, stop members, arrangement of ports or conduits
    • 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
    • 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
    • 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
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid 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
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated 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
    • F02M63/0014—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
    • F02M63/0028—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
    • 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

  • injection systems with high-pressure accumulators have the advantage that the injection pressure can be adapted to the load and speed of the internal combustion engine. To reduce the resulting emissions and to achieve a high specific power of the internal combustion engine, a high injection pressure is required. Since the achievable by high-pressure fuel pumps in the high-pressure accumulator pressure level is limited for strength reasons, can be used to further increase pressure in fuel injectors with a high-pressure accumulator a pressure booster on the fuel injector.
  • DE 199 10 907 A1 discloses a fuel injector having a pressurizing unit disposed between a pressure accumulating space and a nozzle space. Its pressure chamber is connected via a pressure line to the nozzle chamber. Furthermore, a bypass line connected to the pressure storage space is provided. The bypass line is connected directly to the pressure line. The bypass line is suitable for a pressure injection and is arranged parallel to the pressure chamber, so that the bypass line is independent of the movement and position of a slidably ordered pressure medium of the pressure booster unit.
  • DE 102 18 904.8 refers to a fuel injector.
  • a fuel injection device for internal combustion engines is proposed with a fuel injector, which can be supplied by a high-pressure fuel source, and a pressure booster device.
  • the closing piston of a fuel injector protrudes into a closing pressure chamber in such a way that the closing piston can be acted upon by fuel pressure to achieve a force acting on the closing piston in the closing direction, whereby the closing pressure space and the rear space of the pressure booster device are formed by a common closing pressure return space. All partial areas of the closing pressure rear space are permanently connected to one another for the purpose of exchanging fuel.
  • a fuel injection device with a pressure booster which has a working space, a differential pressure chamber and a high pressure chamber for pressure boosting.
  • the pressure booster is controlled by controlling the differential pressure chamber by means of a 2/2-way valve, which the differential pressure chamber to a low pressure / return system
  • the filling of the differential pressure chamber takes place via a hydraulically throttled control line, which communicates with the constantly pressurized working space. Less fuel flows through the throttled control line than flows out via the open 2/2 directional valve, so that the differential pressure chamber can be relieved of pressure to control the pressure intensifier.
  • the central control line for pressure relief or pressurization of serving for the actuation of the pressure booster differential pressure chamber is substantially coaxial with the axis of symmetry through the pressure booster piston and extends through the pressurized working space of the pressure booster.
  • the control line is sealed against the working space via a high-pressure-tight connection.
  • the omission of a guided on the outside of the fuel injector with pressure booster control line also reduces the outer dimension of the fuel injector or avoids an eccentric to the fuel injector oriented arrangement of a pressure booster.
  • a coaxially extending to the axis of symmetry of the fuel injector control line in the booster piston advantageously avoids Bohrungsverschneidungen, as inevitably occur in external lines due to the connection position of high pressure connections and reduces the material stress, which in turn increases the service life of the fuel injector with pressure booster.
  • a seal between the working space and the central control line can be achieved by means of a biased by a spring element sealing sleeve, which advantageously cooperates with a flat seat in the working space. This allows the compensation of production-related tolerances in a running with a plurality of housing parts to be joined fuel injector with pressure booster.
  • the central control line extends through an extension formed on the piston of the pressure booster, which has a guide section for the sealing sleeve movably arranged on the piston shoulder.
  • a piston extension arranged on the booster piston of the pressure booster can be accommodated in a high-pressure-tight guide, which is embodied in one of the housing parts of the fuel injector with pressure booster.
  • the high pressure-tight guide of the piston extension is designed so that it is effective along the entire stroke of the piston of the pressure booster and the central control line separates from the working space of the pressure booster.
  • a piston can be received, which has a continuous channel.
  • a sealing point can be designed as a flat seat to seal the central control line against the working space of the pressure booster.
  • the pressure booster contains a piston element extending continuously through the piston element with a channel extending continuously through it. The channel is connected depending on the stroke of the pressure booster by a first or by a first and a second flow area with the differential pressure chamber of the pressure booster.
  • the central control line can be used with all pressure intensifiers that are controlled via a differential pressure chamber.
  • FIG. 1 shows an embodiment of a fuel injector with pressure booster whose piston has a piston neck, which is traversed by a portion of the central control line.
  • a fuel injection device 1 is acted upon by a high-pressure accumulator 2 (common rail) with fuel under high pressure.
  • the high-pressure fuel contained in the high-pressure accumulator 2 flows to an injector body 4 of the fuel injection device 1 via a high-pressure feed line 3.
  • an inlet 6 to a switching valve 5 extends from the switching valve 5 branches on the one hand a low-pressure side return 7 in a in FIG. 1 Not shown fuel reservoir discharges, and an overflow line 43, which is in communication with a recess 35 within the first housing part 8.
  • the injector body 4 of the fuel injection device 1 comprises a first housing part 8 and a further, second housing part 9 and an injector housing 10 which encloses an injection valve member 24.
  • the first housing part 8 and the second housing part 9 abut each other along a butt joint 32.
  • a pressure booster 11 is received in the injector body 4 of the fuel injection device 1.
  • the pressure booster 11 comprises a working space identified by the reference numeral 12, which can be acted upon by fuel flowing under high pressure via an inlet 13 branching off from the high-pressure line 3.
  • the pressure booster 11 comprises a pressure booster piston 14, which includes a first end face 15, which assigns the working space 12, and a second end face 16, which assigns a differential pressure chamber 17.
  • the pressure booster piston 14 is supported on the second end face 16 by a return spring 18, which in turn is supported on an annular surface within the second housing part 9 of the injector body 4.
  • the pressure booster piston 14 of the pressure booster 11 acts on a high-pressure chamber 19 which is located in the lower region of the second housing part 9.
  • the high-pressure space 19 zu josden end face of the pressure booster piston 14, the fuel contained in this compressed again and flows on the one hand into a control chamber 20 and on the other hand via a nozzle chamber inlet 22 into a nozzle chamber 23 in the injector 10th is trained.
  • the nozzle chamber 23 encloses the injection valve member 24 of the fuel injection device in a region in which a pressure shoulder is formed on the injection valve member 24.
  • an annular gap extends to the combustion chamber end of the fuel injector 1.
  • injection openings 25 are acted upon at the combustion chamber end of the fuel injection device 1 with fuel. These are released in a vertical movement of the injection valve member 24, so that can be injected via the injection openings 25 under high pressure fuel in a combustion chamber 26 of a self-igniting internal combustion engine.
  • a nozzle spring 27 is received, which surrounds a pin 28 of the injection valve member and is supported on an annular surface of the injection valve member 24.
  • a discharge throttle 30 receiving relief line 29th
  • the pressure booster piston 14 of the pressure booster 11 includes a central control line 31.
  • the central control line 31 is connected via a formed in the pressure booster piston 14 transverse opening 41 with the differential pressure chamber 17 of the pressure booster 11 in combination.
  • the transverse opening 41 in turn is connected to a central control line 31 representing channel 40, which passes through the working space 12 and the differential pressure chamber 17 separating portion of the pressure booster piston 14 and through a on the first end face 15 of the pressure booster piston 14 arranged piston extension 34 extends.
  • the piston neck 34 accommodating the channel 40 on the first end face 15 of the pressure-transmitting piston 14 extends into the recess 35 in the first housing part 8 of the injector body 4.
  • a first sealing sleeve 36 can be moved within a guide section 42 on the piston shoulder 34 of the pressure booster piston 14.
  • the first sealing sleeve 36 comprises an annular projection 39, on which a positioning spring 38 is supported.
  • the adjusting spring 38 is supported with its first sealing sleeve 36 opposite end on the first end face 15, the piston neck 34 from surrounding.
  • the first sealing sleeve 36 received on the piston shoulder 34 is set with a sealing surface 37 against the lower end face of the first housing part 8 of the injector body 4.
  • the in FIG. 1 illustrated embodiment may be formed to compensate for manufacturing tolerances between the first housing part 8 and the second housing part 9 of the fuel injector 4, the high-pressure-tight connection 33 as a flat seat.
  • the protruding into the recess 35 of the first housing part 8 portion of the piston extension 34 can be performed with radial clearance in the recess 35 so that a contact-free guidance between the upper portion of the piston extension 34 and the recess 35 in the first housing part 8 can be achieved.
  • the differential pressure chamber 17 is pressurized by the high-pressure accumulator 2 via the high pressure line 3, the inlet 6 and the overflow line 43 and the recess 35 in the first housing part 8. From there, the fuel flows through the channel 40 forming the central control line 31 and enters via the transverse opening 41 in the differential pressure chamber 17 and acted upon this again with the pressure prevailing in the high-pressure accumulator 2 pressure level. As a result, the high-pressure chamber 19 is relieved, as well as the nozzle chamber 23 surrounding the injection valve member 24 in the injector housing 10. About the nozzle spring 27, the injection valve member 24 is pressed in its combustion chamber side seat, the injection is completed.
  • FIG. 1 illustrated embodiment of the idea underlying the invention is arranged on the first end face 15 of the pressure booster piston 11 of the piston extension 34.
  • 1 fuel volume flows either from or into the differential pressure chamber 17.
  • a sealing of the recess 35 within the first housing part 8 is achieved in this embodiment by the piston 34 on the first movably guided first sealing sleeve 36.
  • the guided on the piston shoulder 34 guided first sealing sleeve 36 is supported by an adjusting spring 38 in an advantageous manner. Due to the dimensioning of the adjusting spring 38, the effectiveness of the high-pressure-tight connection 33 at the lower end side of the first Housing parts 8 are ensured over the entire stroke of the pressure booster piston 14 within the second housing part 9 of the injector body 4.
  • the leadership of the central control line 31 substantially coaxially with the line of symmetry of the injector body 4 avoids an additional to be provided on the outside of the injector 4 to the switching valve 5 high-pressure line, which would be required to control the differential pressure chamber 17 of the booster 11.
  • a via the differential pressure chamber 17 (also referred to as the back space) controlled pressure intensifier 11 is particularly favorable in terms of its relaxation losses.
  • FIG. 2 shows an embodiment of a fuel injector with pressure booster, wherein the central control line extends through a piston neck, which is guided in a high-pressure-tight guide of the injector body 4.
  • the fuel injection device 1 is supplied via the pressure accumulator 2 (common rail) with fuel under high pressure. From the pressure accumulator 2, fuel flows via the high-pressure line 3 to the first housing part 8 of the injector body 4. The first housing part 8 of the fuel injection device 1 abuts against a butt joint 32 on the second housing part 9 of the injector body 4.
  • the injector body 4 of the fuel injection device 1 further comprises the injector housing 10 in which the injection valve member 24 releasing or closing the injection openings 25, which can be embodied as a nozzle needle, is accommodated.
  • the first housing part 8 of the injector body 4 of the fuel injection device 1 flows under high pressure fuel. This is passed via the inlet to the switching valve 5.
  • the switching valve 5 comprises a connection to the low-pressure side return 7 and an overflow 43 to the formed in the first housing part 8 recess 35.
  • the pressure booster 11 comprises a pressure booster piston 14, which separates the working space 12 of the pressure booster 11 from its differential pressure chamber 17.
  • the pressure booster piston 14 comprises the piston extension 34 fastened to the first end face 15.
  • a first washer 51 is arranged on the piston extension 34 passing through the working space 12 in the second housing part 9.
  • a further, second disc 52 is disposed on the inside of the working space 12 of the pressure booster 11. Between the first and the second disc 51, 52, a return spring 18 is received, via which the pressure booster piston 14 is returned to its initial position within the second housing part 9.
  • the lower end face of the pressure booster piston 14 acts on the high pressure chamber 19 formed in the second housing part 9 of the injector body 4.
  • the high pressure level achievable in the high-pressure chamber 19 depends on the transmission ratio of the pressure booster 11 and is higher than the pressure level prevailing in the high-pressure reservoir 2.
  • From the high-pressure chamber 19 of the pressure intensifier 11 under a further increased pressure level stationary fuel flows through the nozzle chamber inlet 22 to the nozzle chamber 23 in the injector 10 to.
  • the injection valve member 24 comprises a pressure shoulder.
  • the control chamber 20 for the injection valve member 24 includes a nozzle spring 27, on the one hand on an annular surface of the injection valve member 24, a pin 28 surrounding, is supported. On the other hand, the nozzle spring 27 rests against a wall of the second housing part 9 delimiting the nozzle chamber 20.
  • the pressure booster piston 14 of the pressure booster 11 comprises a central control line 31.
  • the central control line 31 is formed as a both the piston shoulder 34 and the pressure booster piston 14 passing through channel 40, at its lower, opening into the differential pressure chamber 17 end, a Transverse opening 41 comprises.
  • This can be designed as a bore, as a channel or the like in the pressure booster piston 14.
  • the channel 40 extends into the recess 35 in the first housing part 8 of the injector body 4.
  • the high pressure-tight guide 50 within the first housing part 8 goes into the Recess 35 and is formed in a the stroke of the pressure booster piston 14 corresponding axial length. This ensures that along the entire stroke of the pressure booster piston 14 of the pressure booster 11, a high-pressure seal between the recess 35 is ensured within the first housing part 8 and the working space 12 of the pressure booster 11.
  • the pressure booster 11 In the in FIG. 2 shown position is the pressure booster 11 in its rest position.
  • the differential pressure chamber 17 and the working chamber 12 are connected via the switching valve 5 and the inlet 13 to the working chamber 12 and via the inlet 43, 35, 40 to the differential pressure chamber 17 with the pressure accumulator 2 in combination. Therefore prevails in the in FIG. 2 illustrated switching position of the switching valve 5 in the working space 12 and the differential pressure chamber 17 identical pressure.
  • About the branching off from the differential pressure chamber 17 of the pressure booster relief line 29 and the Budapeststommone flow restrictor 30 is in the differential pressure chamber 17 prevailing pressure level beyond in the control chamber 20 of the injection valve member 24 at.
  • the switching valve 5 Upon actuation of the switching valve 5, ie its transfer from the in FIG. 2 shown switching position in which the overflow line 43 is brought into connection with the low-pressure side return 7, the pressure differential of the differential pressure chamber 17 takes place.
  • the fuel flows from the differential pressure chamber 17 via the formed in the pressure booster piston 14 transverse opening 41 into the central control line 31 forming channel 40 and from this into the recess 35 within the first housing part 8 a. From the recess 35, the fuel flows via the overflow line 43 into the low-pressure side pressure run 7 and from there into an in FIG. 2 Not shown fuel reservoir from.
  • FIG. 2 illustrated variant requires fewer items and is therefore cheaper to manufacture.
  • FIG. 3 shows an embodiment of the fuel injector with pressure booster with a partially embedded in the pressure booster piston member.
  • FIG. 3 illustrated embodiment of a fuel injector with pressure booster differs from the in FIGS. 1 and 2 illustrated embodiments of a fuel injector with pressure booster in that in the pressure booster piston 14, a piston member 60 is integrated.
  • the piston member 60 is slidably received within the pressure booster piston 14.
  • There is a space 63 between the lower end face of the piston part 60 and the pressure booster piston and the piston part 60 accommodated in the pressure booster piston 14 comprises on its end face opposite the first housing part 8 a sealing seat 61 which compensates for tolerances between the first housing part 8 and the housing second housing part 9 of the injector body 4 is also designed as a flat seat.
  • the central control line 31 which extends as a channel 40 through the piston member 60, sealed against the working space 12 of the pressure booster 11.
  • the guide surface for the piston part 60 in the pressure booster piston 14 is designated by reference numeral 64.
  • the sealing seat is arranged on a disk-shaped area formed in enlarged diameter. The fuel contained in the working chamber 12 of the pressure booster 11 presses the piston member 60 via this annular surface to the first housing part 8 and thus supports the sealing effect of the sealing seat 61 between the working chamber 12 and the central control line 31 via which the differential pressure chamber 17 of the pressure booster 11 pressure relieved or is pressurizable.
  • FIG. 3 illustrated embodiment of a fuel injection device The functioning of the in FIG. 3 illustrated embodiment of a fuel injection device is as follows.
  • the volume of fuel contained in the high pressure accumulator flows through the high pressure line 3 to the first housing part 8.
  • the fuel flows via the overflow line 43 to the recessed into the pressure booster piston 14 piston part 60 and passes through the one portion of the central control line 31 forming channel 40.
  • the fuel enters the space 63, from which it flows via the transverse opening 41 in the differential pressure chamber 17 of the pressure booster 11.
  • the overflow 43 is brought upon actuation of the switching valve 5 with the low-pressure side return 7 in connection, whereby the differential pressure chamber 17 via the transverse opening 41, the space 63 in the piston part 60 formed central control line 31 (channel 40) is relieved of pressure in the low-pressure side return.
  • Due to the first end face 15 of the pressure booster piston 14 acting on the fuel in the working chamber 12 moves the pressure booster piston 14 with its the high-pressure chamber 19 assigning end face in this.
  • the overflow 43 and thus the upper piston surface of the piston member 60 is at low pressure.
  • the surface of the piston member 60 in the working space 12 shows a hydraulic sealing force.
  • the piston part 60 is pressed against the housing part 8.
  • the injector member 24 which can be formed, for example, as a nozzle needle, comprises a pressure shoulder, which causes a vertical movement in the opening direction of the injection valve member 24 into the control chamber 20 due to the high pressure fuel flowing into the nozzle chamber 23.
  • the fuel contained in the nozzle chamber 23 flows via the annular gap surrounding the injection valve member 24 into injection openings 25 and is injected from there into the combustion chamber 26 of the autoignition internal combustion engine.
  • the fuel volume displaced in the nozzle chamber 20 when the nozzle of the injection valve member 24 is displaced flows via the relief line 29 and the throttle point 30 contained therein to the pressure-relieved differential pressure chamber 17. From there, the diverted control volume flows via the transverse opening 41, the space 63, the central control line 31 within the piston part 60 and the overflow line 43 to the switching valve 5 and from there into the low-pressure side return 7.
  • FIG. 4 is a fuel injector removable with pressure booster, which is controlled by a servohydraulic trained 3/2-way valve.
  • the fuel injector shown in Fig. 1 is also controlled by the injector containing a pressure booster 11 via a switching valve 70 arranged on the upper side of the fuel injection device 1, but designed as a servohydraulic 3/2 way valve.
  • the servohydraulic switching valve 70 comprises a servo piston (valve body 71) and a control valve arranged at the return 73.
  • the switching valve 70 is connected via a line to the working space 12 of the pressure booster in connection.
  • ND denotes a low-pressure side return, which also branches off from the valve housing of the switching valve 70.
  • a control edge designated VQ1 is opened and a control edge designated VQ2 is closed.
  • the control line 31 is thus connected to the working space 12 of the pressure booster.
  • the valve 70 is switched, the control edge VQ1 is closed and the control edge VQ2 is opened, so that the central control line 31 communicates with the low-pressure side return ND.
  • a low-pressure side return 73 extends to a in FIG. 4 Not shown fuel reservoir, such as the tank of a motor vehicle.
  • the servohydraulic 3/2-way valve comprises a valve body 71, which is traversed by a through hole 72 which receives a throttle point.
  • the pressure booster piston 14 separates the working space 12 of the pressure booster 11 from the integrated in the injector body 4 differential pressure chamber 17. Within the working space 12 of the pressure booster 11, the return spring 18 is added. This is supported, a sleeve-shaped portion of the pressure booster piston 14 surrounding the first disc 51 and the second disc 52 from.
  • the first disc 51 is attached to the upper end face of the pressure booster piston 14, while the second disc 50 may be introduced into the wall of the injector body 4.
  • the second disc 52 is located above the first end face 15 of the pressure booster piston, while the second end face 16 of the pressure booster piston 14 is a boundary surface of the differential pressure chamber 17 of the pressure booster 11.
  • the control chamber 20 of an injection valve member 80 is integrated into the pressure booster piston 14. Within the control chamber 20, the one end face 79 of the injection valve member 80 acting on nozzle spring 27 is inserted.
  • the injection valve member 80 according to the embodiment in FIG. 4 is surrounded by the high-pressure chamber 19 of the pressure booster 11, that is, in this embodiment, the high-pressure chamber 19 and the nozzle chamber 23 are identical.
  • the nozzle chamber 23 is formed by the high-pressure chamber 19 of the pressure booster 11.
  • the injection valve member 80 is surrounded below the high-pressure chamber 19 of the pressure booster piston 14 by a sealing sleeve 81.
  • the sealing sleeve 81 is connected via a spring element 82, which in the high-pressure chamber 19 of the pressure booster 11 is inserted, acted upon and sealed against the high pressure chamber 19 of the pressure booster 11 assigning end face, so that the control chamber 20 and a dipping into this coaxial piston 74 are sealed against the high-pressure chamber 19.
  • the injection valve member 80 has a fuel passage 83 which passes through the injection valve 80 in an inclined position and opens at the combustion chamber end of the fuel injection device 1 into an annular gap 84 between injection valve member 80 and injector body 4. Below the annular space 84 in the injector body 4, the combustion chamber-side seat of the injection valve member 80 is closed.
  • a coaxial piston 74 is inserted, which is arranged symmetrically to the axis of symmetry of the injector body 4 of the fuel injection device 1 and is received stationary within the injector body 4.
  • the coaxial piston 74 is penetrated by the central control line 31 for pressurizing or pressure relief of the differential pressure chamber 17 serving channel 40.
  • the coaxial piston 74 comprises a support surface 75.
  • a biasing spring 76 is supported, which seals the sealing sleeve 36 against the injector body 4.
  • the central control line 31 is sealed against the in the working chamber 12 via the high pressure line 3 pending, prevailing in the high pressure accumulator 2 high pressure.
  • the sealing sleeve 36 of the coaxial piston 74 this is enclosed by the recorded in the control chamber 20 nozzle spring 27.
  • the coaxial piston 74 traversing transverse opening 41.
  • the first outflow cross section 77 has a smaller flow cross section compared to the second outflow cross section and is always effective while the second outflow cross section 78 is opened or closed in accordance with the stroke of the pressure booster piston 14 of the pressure booster 11.
  • the fuel flows via the overflow line 43 connected to the injector body 4 into the servohydraulic switching valve 70 and via the control edge VQ2 (valve cross-section) into the low-pressure-side return line ND.
  • VQ2 valve cross-section
  • the taking place via the outflow cross sections 77 and 78 pressure relief of the differential pressure chamber 17 causes a corresponding to the transmission ratio of the booster 11 failing pressure increase within the high-pressure chamber 19, in the embodiment according to FIG. 4 acts as a nozzle chamber.
  • the high-pressure chamber 19 and the control chamber 20 are separated from each other via the second sealing sleeve 81 acted upon by the spring 82, so that no overflow of fuel occurs. Due to the increase in pressure in the high-pressure chamber 19 at this retracting pressure booster piston 14, the pressure increases significantly.
  • the increasing fuel pressure acts on one of the injection valve member 80 formed pressure shoulder, which ascends against the force of the nozzle spring 27 in the control chamber 20, ie opens.

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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 d'injection de carburant (1), qui est en liaison avec une source haute pression (2), comprenant un corps d'injecteur en plusieurs parties (4, 8, 9, 10) dans lequel est reçu un multiplicateur de pression (11) pouvant être actionné par le biais d'un espace de pression différentielle (17), dont le piston de multiplicateur de pression (14) sépare un espace de travail (12) de l'espace de pression différentielle (17) et dans lequel le dispositif d'injection de carburant (1) peut être actionné par une soupape de commutation (5, 70), une variation de pression dans l'espace de pression différentielle (17) du multiplicateur de pression (11) s'effectuant par le biais d'une conduite de commande centrale (31), qui s'étendant à travers le piston de multiplicateur de pression (14), caractérisé en ce que la conduite de commande centrale (31) s'étend essentiellement coaxialement à l'axe de symétrie du piston de multiplicateur de pression (14) et en ce que la conduite de commande centrale (31) s'étend à travers l'espace de pression (12) du multiplicateur de pression (11) et est rendue étanche vis-à-vis de celui-ci par le biais d'une connexion étanche aux hautes pression (33, 50, 61).
  2. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que la conduite de commande centrale (31) s'étend essentiellement coaxialement à l'axe de symétrie du corps d'injecteur (4 ; 8, 9, 10).
  3. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que le piston de multiplicateur de pression (14) comprend une portion de conduite (34, 60, 74) de la conduite de commande centrale (31) à travers laquelle s'étend le canal (40) constituant la conduite de commande centrale (31) dans l'espace de travail (12) du multiplicateur de pression (11).
  4. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que le canal (40) débouche dans un évidement (35) à l'intérieur d'une première partie de boîtier (8) du corps d'injecteur (4 ; 8, 9, 10) qui est connectée par le biais d'une conduite de trop-plein (43) à la soupape de commutation (5, 70).
  5. Dispositif d'injection de carburant selon la revendication 3, caractérisé en ce que la portion de conduite de la conduite de commande centrale (31) est réalisée sous forme de pièce de piston tubulaire (34).
  6. Dispositif d'injection de carburant selon la revendication 3, caractérisé en ce que la portion de conduite de la conduite de commande centrale (31) est réalisée sous forme de piston coaxial (74), par rapport auquel le piston de multiplicateur de pression (14) peut se déplacer.
  7. Dispositif d'injection de carburant selon les revendications 1 et 3, caractérisé en ce qu'une douille d'étanchéité (36) sollicitée par ressort, déplaçable par à la portion de conduite (34), est reçue au niveau de la portion de conduite (34) de la conduite de commande centrale (31), et permet d'effectuer une étanchéité haute pression (33) de l'espace de travail (12).
  8. Dispositif d'injection de carburant selon les revendications 1 et 3, caractérisé en ce que la portion de conduite (34) comprend une portion de guidage étanche aux hautes pressions (50) qui est guidée dans une première partie de boîtier (8) du corps d'injecteur (4 ; 8, 9, 10).
  9. Dispositif d'injection de carburant selon les revendications 1 et 3, caractérisé en ce que dans le piston de multiplicateur de pression (14) est reçue de manière déplaçable une partie de piston (60) entourée par celui-ci, formant une portion de conduite de la conduite de commande centrale (31), dans la région de tête de laquelle est réalisée une surface d'étanchéité (61) constituant une connexion étanche aux hautes pressions.
  10. Dispositif d'injection de carburant selon la revendication 7, caractérisé en ce que la douille d'étanchéité (36) est appliquée contre le corps d'injecteur (4 ; 8, 9, 10) au moyen d'un élément de ressort (38, 76), qui s'appuie soit sur la portion de conduite (74) soit sur un côté frontal (15) du piston de multiplicateur de pression (14).
  11. Dispositif d'injection de carburant selon la revendication 3, caractérisé en ce que la partie de piston (60) formant une portion de conduite de la conduite de commande centrale (31) présente une surface à commande hydraulique et est appliquée par le fluide reçu dans l'espace de travail (12), en provoquant une connexion étanche aux hautes pressions (61), contre une surface de limitation de l'espace de travail (12) du multiplicateur de pression (11).
  12. Dispositif d'injection de carburant selon la revendication 3, caractérisé en ce que des sections transversales d'écoulement (77, 78) de l'espace de pression différentielle (17) à la conduite de commande centrale (31) peuvent être commandée en fonction de la course.
  13. Dispositif d'injection de carburant selon la revendication 12, caractérisé en ce que la variation de pression a lieu dans l'espace de pression différentielle (17) par le biais d'un espace de commande (20), dans lequel débouche la première section transversale d'écoulement (77).
  14. Dispositif d'injection de carburant selon la revendication 12, caractérisé en ce que la deuxième section transversale d'écoulement (78) dépasse la section transversale de la première section transversale d'écoulement (77).
  15. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que la soupape de commutation (5) est réalisée sous forme de soupape à 3/2 voies.
  16. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que la soupape de commutation est réalisée sous forme de soupape servohydraulique à 3/2 voies.
EP03770904A 2002-10-14 2003-10-07 Dispositif d'injection de carburant a pression multipliee, pourvu d'une conduite de commande interne Expired - Lifetime EP1554488B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10247903A DE10247903A1 (de) 2002-10-14 2002-10-14 Druckverstärkte Kraftstoffeinspritzeinrichtung mit innenliegender Steuerleitung
DE10247903 2002-10-14
PCT/DE2003/003314 WO2004036027A1 (fr) 2002-10-14 2003-10-07 Dispositif d'injection de carburant a pression multipliee, pourvu d'une conduite de commande interne

Publications (2)

Publication Number Publication Date
EP1554488A1 EP1554488A1 (fr) 2005-07-20
EP1554488B1 true EP1554488B1 (fr) 2010-07-21

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EP03770904A Expired - Lifetime EP1554488B1 (fr) 2002-10-14 2003-10-07 Dispositif d'injection de carburant a pression multipliee, pourvu d'une conduite de commande interne

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Country Link
US (1) US7513440B2 (fr)
EP (1) EP1554488B1 (fr)
JP (1) JP2006503209A (fr)
DE (2) DE10247903A1 (fr)
WO (1) WO2004036027A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004088122A1 (fr) * 2003-04-02 2004-10-14 Robert Bosch Gmbh Injecteur de carburant comportant un transmetteur de pression commande par une soupape asservie
DE10315016A1 (de) * 2003-04-02 2004-10-28 Robert Bosch Gmbh Kraftstoffinjektor mit leckagefreiem Servoventil
DE10315015B4 (de) * 2003-04-02 2005-12-15 Robert Bosch Gmbh Kraftstoffinjektor mit Druckverstärker und Servoventil mit optimierter Steuermenge
DE10352736A1 (de) * 2003-11-12 2005-07-07 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Nadeleinspritzung
JP2006257874A (ja) * 2004-04-30 2006-09-28 Denso Corp インジェクタ
DE102004022267A1 (de) * 2004-05-06 2005-12-01 Robert Bosch Gmbh Verfahren und Vorrichtung zur Formung des Einspritzdruckes an einem Kraftstoffinjektor
DE102004022268A1 (de) * 2004-05-06 2005-12-01 Robert Bosch Gmbh Ansteuerverfahren zur Beeinflussung der Öffnungsgeschwindigkeit eines Steuerventiles an einem Kraftstoffinjektor
JP3994990B2 (ja) * 2004-07-21 2007-10-24 株式会社豊田中央研究所 燃料噴射装置
DE102004051757A1 (de) * 2004-10-23 2006-04-27 Robert Bosch Gmbh Kraftstoffinjektor mit hydraulisch betätigbarem Druckübersetzer
DE102004053422A1 (de) 2004-11-05 2006-05-11 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung
SE529810C2 (sv) * 2006-04-10 2007-11-27 Scania Cv Ab Insprutningsorgan för en förbränningsmotor
JP4548465B2 (ja) * 2007-01-23 2010-09-22 株式会社デンソー インジェクタ
DE102007021326A1 (de) * 2007-05-07 2008-11-13 Robert Bosch Gmbh Druckverstärkungssystem für mindestens einen Kraftstoffinjektor
DE102007023384A1 (de) * 2007-05-18 2008-11-20 Robert Bosch Gmbh Injektor für eine Kraftstoffeinspritzanlage
US20080296412A1 (en) * 2007-06-01 2008-12-04 Caterpillar Inc. Fuel injector having a flow passage insert
JP4894804B2 (ja) * 2008-03-28 2012-03-14 株式会社デンソー 燃料噴射弁
FI122557B (fi) * 2009-04-02 2012-03-30 Waertsilae Finland Oy Mäntämoottorin polttoaineenruiskutusjärjestely
DE102010008467A1 (de) 2010-02-18 2011-08-18 Continental Automotive GmbH, 30165 Hochdruck-Kraftstoff-Einspritzventil für einen Verbrennungsmotor
KR101330693B1 (ko) 2011-12-26 2013-11-19 자동차부품연구원 직접분사식 디젤엔진용 인젝터
HUE027556T2 (en) * 2012-06-13 2016-10-28 Delphi Int Operations Luxembourg Sarl atomizer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3102697A1 (de) 1980-12-20 1982-10-21 Volkswagenwerk Ag, 3180 Wolfsburg Kraftstoffeinspritzeinrichtung
DE3048347A1 (de) 1980-12-20 1982-07-22 Volkswagenwerk Ag, 3180 Wolfsburg Kraftstoffeinspritzeinrichtung
US4538576A (en) * 1983-07-21 1985-09-03 Allied Corporation Diesel fuel injector with double dump configuration
JPS60192872A (ja) * 1984-03-15 1985-10-01 Nippon Denso Co Ltd 蓄圧式燃料噴射弁
DE19910970A1 (de) 1999-03-12 2000-09-28 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
DE19954288A1 (de) * 1999-11-11 2001-05-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10031579A1 (de) * 2000-06-29 2002-01-17 Bosch Gmbh Robert Druckgesteuerter Injektor mit Vario-Register-Einspritzdüse
DE10124207A1 (de) 2001-05-11 2002-11-21 Bosch Gmbh Robert Druckverstärker einer Kraftstoffeinspritzeinrichtung
DE10218904A1 (de) 2001-05-17 2002-12-05 Bosch Gmbh Robert 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
WO2002092997A1 (fr) 2001-05-17 2002-11-21 Robert Bosch Gmbh Systeme d'injection de carburant

Also Published As

Publication number Publication date
US20060043209A1 (en) 2006-03-02
EP1554488A1 (fr) 2005-07-20
US7513440B2 (en) 2009-04-07
WO2004036027A1 (fr) 2004-04-29
DE50312913D1 (de) 2010-09-02
DE10247903A1 (de) 2004-04-22
JP2006503209A (ja) 2006-01-26

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