EP1211411A2 - Injecteur modulaire pour injecter du combustible - Google Patents

Injecteur modulaire pour injecter du combustible Download PDF

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Publication number
EP1211411A2
EP1211411A2 EP01127102A EP01127102A EP1211411A2 EP 1211411 A2 EP1211411 A2 EP 1211411A2 EP 01127102 A EP01127102 A EP 01127102A EP 01127102 A EP01127102 A EP 01127102A EP 1211411 A2 EP1211411 A2 EP 1211411A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic module
hydraulic
injector
pressure
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.)
Withdrawn
Application number
EP01127102A
Other languages
German (de)
English (en)
Other versions
EP1211411A3 (fr
Inventor
Roger Potschin
Ulrich Projahn
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 EP1211411A2 publication Critical patent/EP1211411A2/fr
Publication of EP1211411A3 publication Critical patent/EP1211411A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0061—Single actuator acting on two or more 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/06—Pumps peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/365—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages valves being actuated by the fluid pressure produced in an auxiliary pump, e.g. pumps with differential pistons; Regulated pressure of supply pump actuating a metering valve, e.g. a sleeve surrounding the pump piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating 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
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric operating 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
    • 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
    • F02M63/0031—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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • Constantly increasing requirements for emissions from motor vehicles require in Combustion engine running combustion processes, in addition to optimal fuel efficiency to an optimal, i.e. clean combustion.
  • the one in an internal combustion engine The incineration process can essentially be shaped, i.e. influencing the course of the injection can be influenced.
  • the formation of the injection process on the one hand requires flexible working and designed injection systems, their Manufacturing and development costs, on the other hand, must be justifiable.
  • EP 0 823 549 A2 relates to an injector arrangement for injecting fuel.
  • An anchor element actuates both a drain valve and a control needle valve, which regulates the pressure in a control chamber.
  • the drain valve and the control needle valve are over controlled an electromagnetic control via a common component.
  • the control needle valve and the top of the control needle valve parts of a control chamber and dimensioned so that the control needle valve is essentially pressure balanced at all times. From the chosen arrangement according to EP 0 823 549 A2, it follows that the control section elements, i.e.
  • DE 100 12 552 A1 relates to an injection device with an actuator for needle stroke control.
  • One of the the control valve forming the injection course contains a pressure compensation system, whereby the injection pressure curve can be varied by changing the stroke of the nozzle needle.
  • DE 100 14 450 relates to a device for injecting variable fuel Injection pressure curve.
  • This solution extends from the pressure chamber of an injector a high pressure line through the injector housing, in which one by means of a Nozzle needle closable nozzle is added.
  • the nozzle needle is by means of a Lift mechanism applied.
  • an actuator element is independent Control valves which can be set and controlled from one another are provided via a coupling space communicate with each other and via which the injection pressure curve can be controlled is.
  • an interchangeably configured hydraulic module is installed by an injector under high pressure fuel, by means of which individually shapable injection profiles can be generated.
  • the hydraulic modules on the injector that implement the various injection pressure profiles need to be replaced; the rest of the injector can be removed unchanged from the current series in accordance with the principle of using the same part and requires no modifications.
  • the injection process can be easily adapted to the respective customer requirements, ie to the respective uses of an injector on internal combustion engines, be it in the car or commercial vehicle sector, without having to provide a special pump arrangement each time.
  • the exchangeably configured hydraulic module which in one embodiment variant of the concept on which the invention is based can be designed as an actuator module that can be actuated by an actuator, wherein piezo actuators can preferably be used.
  • this can also be designed as a hydraulic module which can be actuated via electromagnets integrated in it.
  • the modularity of the hydraulic module can be brought about using a piezo actuator which acts on a hydraulic coupling chamber of two control valves accommodated in the hydraulic module and acts on it in parallel. When using a piezo actuator, two control valves can be operated. This allows a simpler construction of the control device, since only a simple plug is required due to a smaller number of pins. This enables a simpler output stage to be implemented on the control unit, and there is also less power loss at the control unit.
  • the hydraulic actuation of the valves accommodated in the hydraulic module allows to arrange the piezo actuator spatially decoupled from the control valves of the hydraulic module. This is an additional degree of freedom for the construction of the hydraulic module given.
  • the control valves can be arranged parallel to one another, which means that Height of the hydraulic module to be integrated in the injector body is positively influenced becomes.
  • the parallel arrangement of the control valves in the hydraulic module also allows to manufacture and adjust the valves independently of each other. Tolerances on one of the Control valves or a change in function variables such as with the Lifetime of the control valve adjusting valve stroke changes or changes in the valve preload does not affect functional changes to other control valve by.
  • they are essentially arranged in parallel to one another two electromagnetic coils are included in the hydraulic module.
  • the electromagnetic coils be enclosed by material of the hydraulic module body or be in high-quality soft magnetic installation elements embedded in the hydraulic module, act on one tax part each.
  • Figure 1 shows the schematic diagram of an injector, its replaceable hydraulic module Contains 2/2-way valves with assigned throttle elements.
  • the injector 1 is an injector housing 2 contains, in the front area of which a nozzle needle 3 is received.
  • the nozzle needle 3 is enclosed at the lower end by a nozzle space 4, in which a pressure line 5 opens.
  • the pressure line 5 is connected to a pump chamber 8 here only schematically represented compression unit 7.
  • the nozzle needle 3 in its tapered area is more annular Channel formed in the injector housing 2 of the injector 1, which is in the region of the injection nozzle opening in the combustion chamber of a cylinder of an internal combustion engine empties.
  • the compression unit 7 - shown here only schematically - includes one Pump chamber 8, in which a piston element 10 can be moved in the vertical direction.
  • the Piston element 10 has a plate-shaped plate, which is on a supports the compression spring 9 surrounding the cylinder of the compression unit 7.
  • the piston element 10 is shown in the schematic diagram shown here according to Figure 1 by a rotating Cam element 11, which is received eccentrically on a shaft, on and moved up. This causes 7 pressure pulsations in the pump chamber 8 of the compression unit a, so that the fuel volume received in the pump chamber 8 is higher Is exposed to pressure and with higher pressure in the pressure line 5 to the nozzle space 4th entry.
  • a nozzle needle spring 12 which acts on the nozzle needle 3 is accommodated in the injector housing 2. which is supported on the injector housing 2.
  • the hydraulic module 14 shown in FIG. 1 which according to FIG the configuration of Figure 1 is actuated via an actuator element 13.
  • the actuator element 13 is designed as a piezo actuator.
  • the piston of the Piezo actuator 13 acts on one of the two control valves 16 and 17 of the hydraulic module 14 coupling space 15 which can be actuated in parallel and in which a control volume is accommodated is.
  • the control valves 16 and 17 of the hydraulic module 14 are according to the Configuration from Figure 1 designed as 2/2-way valves, which in two positions are switchable.
  • a throttle element 19 can also be used with the second control valve 17 In applications. This can alternatively to the constant pressure valve in the from the pressure line 5 to second control valve 17 leading supply line.
  • a branch lies opposite the branch to the second control part 17 to the first control valve 16, which is also designed as a 2/2-way valve, which can be switched from a closed position 22 to an open position 23 and vice versa.
  • Reset valves 20 and 21 are assigned to both control valves 16 and 17, respectively Manufacturing-technically particularly simple design as return springs could be.
  • a drain line 25 is also arranged downstream of the first control valve 16 opens into a reservoir 24.
  • the branches are closed by the pressure line 5 and the full Pressure is in the nozzle ram 4, which surrounds the nozzle needle 3, so that an injection can be done.
  • the first control valve 16 can be opened by briefly and Close a pre-injection 27 or achieve a post-injection 30 while through that of the constant pressure element 18 upstream of the second control valve 17 - alternatively one Throttle element 19 - the absolute pressure of the pressure build-up phase 28 (boot phase) is set can be.
  • Injector pressure curve that can be realized in the injector is plotted in more detail over the time axis.
  • reference numeral 26 is the course of the injection pressure at the tip of the injection nozzle characterized.
  • the achievable with the hydraulic module shown in principle in Figure 1 Injection can essentially be in a pre-injection phase 27 at a relatively low Subdivide the pressure level, which is followed by a pressure build-up phase 28.
  • the Pressure build-up phase 28 is essentially characterized by a constant pressure level, which is in comparison to the main injection phase which occurs at the pressure build-up phase 28 29 is much lower. That which runs essentially evenly Pressure level of the pressure build-up phase 28 is due to the design of the throttle element 19 or the opening pressure of the valve adjustable on the constant pressure valve and can be influenced by these parameters.
  • the main injection is followed by a post-injection 30, the maximum pressure roughly comparable to the maximum pressure that occurs during the pre-injection phase 27 is, with increasing post-injection quantity, the maximum pressure of the pre-injection quantity can exceed.
  • FIG. 2 shows an embodiment variant of a hydraulic module, with a control chamber acting on a control piston on the injector within the Injector.
  • Fuel is the nozzle needle 3 accommodated in the injector housing 2 according to FIG. 2 a control piston 33.
  • the control piston 33 of the nozzle needle 3 projects with a Surface into a control room 32, which is formed in the injector housing 2.
  • the nozzle chamber 4 can be connected via the pressure line 5 act with fuel under high pressure, but via the second control valve 17 of a modified hydraulic module 31 also the control chamber 32, the outlet side an outlet throttle 34 can be connected downstream.
  • the structure of the compression unit 7, the drain lines and the structure of the injector housing in the area of the injection nozzle is analogous to the embodiment variant already described in FIG of an injector proposed according to the invention.
  • FIG. 2a shows the variant of the hydraulic module according to FIG. 2 adjusting injection pressure curve, which is essentially due to a lack of pressure build-up phase 28 is marked, whereas the course of the pressure build-up during the Main injection phase can obey 29 different gradients 35.
  • post-injection 30 achieve, which has a significantly higher pressure peak than the pre-injection 27, the almost the maximum injection pressure that arises during the main injection phase 29 equivalent.
  • FIGS. 3, 4 and 5 show variant embodiments of an actuator-operated hydraulic module out closer.
  • the hydraulic modules 14, 31 and 36 shown in FIGS. 3, 4 and 5 are concerned are all hydraulic modules that can be actuated by an actuator 13, preferably a piezo actuator, where the actuator 13 acts on a coupling space 15 and 39, respectively formed on the end of the hydraulic modules 14, 31 and 36 facing away from the injection nozzle 6 is.
  • the coupling space 15 and 39 therefore provides the interface to the standard configured injector housing 2.
  • the end face of the injection nozzle 6 facing Actuator-operated hydraulic modules 14, 31 and 36 is essentially due to the fact that there provided hydraulic coupling space 15 and 39, respectively, while the installation position the actuator actuated hydraulic modules 14, 31 and 36 in the injector housing 2 by the location the valve openings of the two control valves 16 and 17 in the injector housing 2 definable is.
  • the hydraulic module 14 shown in FIG. 3 essentially corresponds to that in FIG. 1 as the outline sketch described; corresponds to the pressure curve shown in FIG. 3a the pressure curve shown in Figure 1a with pre-injection phase 27, pressure build-up phase 28 (boot phase), main injection phase 29 and post-injection 30 with identical to the pre-injection 27 running pressure maximum.
  • FIG. 4a also shows the pressure curve that occurs at an injector, in which the modified hydraulic module 31 is used as the hydraulic module, which contains two control valves 16, 17 arranged essentially parallel to one another, which are preferably designed as 2/2-way valves.
  • reference numeral 22 is the closed position of the two valve bodies of the control valves 16 and 17 shown during position 15 denotes the hydraulic coupling space of the two control valves 16, 17, via which can be actuated in parallel via a piezo actuator 13.
  • the one shown in Figure 4a Injection pressure curve essentially corresponds to the injection pressure curve from the Representation according to Figure 2a.
  • a further modified hydraulic module is shown schematically in the illustration according to FIG Representation.
  • the further modified hydraulic module contains 36 only a 2/2-way valve 37, while the further control valve as one 2/3 way valve 38 is executed.
  • Reference number 25 is a 2/2-way valve 37 assigned drain line, while reference numeral 40 denotes the flow restrictor Control room referred to in the lower area of the further modified hydraulic module 36 protrudes.
  • reference numeral 41 is the closed position of the two valves 37, 38 designated position reproduced.
  • 5a shows the hydraulic module with the further modified 36 achievable injection pressure curve.
  • the valve in bore 38 remains partially open, whereby the full pressure is not built up (3rd switching position).
  • the boot phase 28 is followed by a main injection 29.
  • a control room 32 is available analogously to the configuration shown in FIG. 2 on the nozzle needle 3, which is controlled with the further modified hydraulic module 36 is, different pressure gradients 35 according to Figure 5a to bring about the main injection to adjust.
  • a post-injection follows the main injection phases 29 30, whose pressure maximum is approximately the same as that which arises in the main injection 29 Pressure maximum corresponds.
  • the compression unit 7 of the injector 1 as shown in FIG. 6 contains one Pump chamber 8, in which a piston element 10 is immersed.
  • the piston element 10 is on the one hand by a spring with a restoring force and on the other hand by a cam 11 mounted eccentrically on a rotating shaft in vertical movement added. This causes fuel under high pressure to pass through the Pressure line 5 in the nozzle chamber 4, which the nozzle needle 3 of the injector 1 in the injector housing 2 encloses.
  • a hydraulic module 42 is acted upon, which two electromagnetically actuatable 2/2-way valves 43 and 44 contains. These are the ones that actuate them Magnetic coils 45 and 46 schematically outlined.
  • the electromagnetically operated Hydraulic module 42 as shown in FIG. 6 essentially corresponds the embodiment variant of an actuator already shown in the schematic diagram of FIG. 1 actuated hydraulic modules 14. Analogous to the representation of the actuator-operated hydraulic module 14 according to FIG. 1 can be seen from the illustration of the hydraulic modules 42 according to FIG. 6, that the second 2/2 control valve 44 either a constant pressure valve 18 or a Throttle element 19 can be assigned.
  • a drain line 25 connects to the first 2/2-way valve 43, as does that second 2/2-way valve 44 via which the hydraulic module 42 and thus the pressure line 5 can be depressurized in a reservoir 24.
  • the injection pressure curve 26 shown in FIG. 6a corresponds because the hydraulic module 42 the hydraulic module 14 according to FIG. 1 essentially except for the actuation variant, the injection curve shown in Figure 1a with pre-injection phase 27, pressure build-up phase 28 (boot phase) and subsequent gradual increase in pressure during the main injection 29.
  • the pressure maximum substantially with the pressure maximum matches, which occurs during the pre-injection phase 27; with increasing Post injection quantity, however, this maximum can still be exceeded.
  • Figure 7 shows an embodiment of an electromagnetically actuated actuator control valves arranged in parallel.
  • an electromagnetic is shown in a schematic view actuable hydraulic module 42.
  • the two control valves 43 and 44 are parallel to each other arranged slightly offset in height in the hydraulic module 42.
  • the solenoids 45, 46 cooperate with armature plates received on the valve needles of the control valves 49, which vertical movement generated by the energization of the solenoids 45, 46 forward to the control body of the control valves 43 and 44.
  • the second 2/2-way valve an annular space 48 is assigned, which can be relieved of pressure via an outlet line 42 and continues with the center of the line of symmetry of the hydraulic module 42 according to FIG Representation from Figure 7 arranged control room is connected.
  • the overall height of the injector 1 as shown in FIG. 8 is denoted by reference number 50 characterized, wherein the compression unit 7, the schematic of Figures 1, 2 and 6th can be seen in the illustration according to Figure 8 was omitted.
  • the Compression unit 7 allows the hydraulic module 42 to be under high pressure Apply fuel.
  • the hydraulic modules such as the hydraulic module 42, may be actuated electromagnetically or actuatable via an actuator, such as that described in the previous figures Hydraulic modules 14, 31 and 36 with 2/2-way valves or 2/3-way valves or constant pressure elements or throttle elements are on the injection nozzle 6 facing End face or this opposite end face is standardized so that the hydraulic modules 14, 31, 36 and 42 can be easily replaced on the injector housing 2 of the injector 1 to let.
  • the hydraulic modules provide the components that determine the course of the injection an injector 1, the different with different design variants of the hydraulic modules 14, 31 and 36 achievable injection pressure profiles as an example are shown in Figures 3a, 4a and 5a.
  • these can Parameters set by dimensioning the hydraulic modules 14, 31, 36 and 42 as well as the pressure gradients 35 which develop in the course of the main injection phase 29.
  • the absolute height can also be determined via the modularity of the hydraulic modules used of the pressure established during the post-injection phase 30.

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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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP01127102A 2000-12-01 2001-11-15 Injecteur modulaire pour injecter du combustible Withdrawn EP1211411A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10059628A DE10059628A1 (de) 2000-12-01 2000-12-01 Modular aufgebauter Injektor zum Einspritzen von Kraftstoff
DE10059628 2000-12-01

Publications (2)

Publication Number Publication Date
EP1211411A2 true EP1211411A2 (fr) 2002-06-05
EP1211411A3 EP1211411A3 (fr) 2004-01-21

Family

ID=7665347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127102A Withdrawn EP1211411A3 (fr) 2000-12-01 2001-11-15 Injecteur modulaire pour injecter du combustible

Country Status (4)

Country Link
US (1) US20020117557A1 (fr)
EP (1) EP1211411A3 (fr)
JP (1) JP2002188542A (fr)
DE (1) DE10059628A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1260705A1 (fr) * 2001-05-17 2002-11-27 Robert Bosch Gmbh Systeme d'injection de carburant pour moteur a combustion interne
WO2003042530A1 (fr) * 2001-11-13 2003-05-22 Robert Bosch Gmbh Dispositif d'injection de carburant conçu pour un moteur a combustion interne
WO2004057176A1 (fr) * 2002-12-20 2004-07-08 Volkswagen Mechatronic Gmbh & Co. Kg Unite d'injecteur-pompe
WO2006130262A1 (fr) * 2005-05-31 2006-12-07 Caterpillar Inc. Systeme et procede de regulation pour injecteur de carburant

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DE102017129223A1 (de) * 2017-12-08 2019-06-13 Keyou GmbH Modularer Injektor
BR102020021497A2 (pt) 2020-10-20 2022-05-03 Mrb Machining & Ferramentaria Ltda Válvula dosadora de combustível de alta vazão
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EP1260705A1 (fr) * 2001-05-17 2002-11-27 Robert Bosch Gmbh Systeme d'injection de carburant pour moteur a combustion interne
US6758414B2 (en) 2001-05-17 2004-07-06 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
WO2003042530A1 (fr) * 2001-11-13 2003-05-22 Robert Bosch Gmbh Dispositif d'injection de carburant conçu pour un moteur a combustion interne
WO2004057176A1 (fr) * 2002-12-20 2004-07-08 Volkswagen Mechatronic Gmbh & Co. Kg Unite d'injecteur-pompe
WO2006130262A1 (fr) * 2005-05-31 2006-12-07 Caterpillar Inc. Systeme et procede de regulation pour injecteur de carburant
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EP1211411A3 (fr) 2004-01-21
JP2002188542A (ja) 2002-07-05
US20020117557A1 (en) 2002-08-29
DE10059628A1 (de) 2002-06-13

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