EP1316717B1 - Dispositif d'injection de carburant pour un moteur à combustion interne - Google Patents

Dispositif d'injection de carburant pour un moteur à combustion interne Download PDF

Info

Publication number
EP1316717B1
EP1316717B1 EP02022359A EP02022359A EP1316717B1 EP 1316717 B1 EP1316717 B1 EP 1316717B1 EP 02022359 A EP02022359 A EP 02022359A EP 02022359 A EP02022359 A EP 02022359A EP 1316717 B1 EP1316717 B1 EP 1316717B1
Authority
EP
European Patent Office
Prior art keywords
pressure
control valve
space
control
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
EP02022359A
Other languages
German (de)
English (en)
Other versions
EP1316717A3 (fr
EP1316717A2 (fr
Inventor
Walter Egler
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 EP1316717A2 publication Critical patent/EP1316717A2/fr
Publication of EP1316717A3 publication Critical patent/EP1316717A3/fr
Application granted granted Critical
Publication of EP1316717B1 publication Critical patent/EP1316717B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • 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
    • 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
    • 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

Definitions

  • the invention is based on a Fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is characterized by the EP 0 957 261 A1.
  • These Fuel injection device has a High-pressure fuel pump and a connected to this Fuel injector for each cylinder of Internal combustion engine.
  • the high-pressure fuel pump points one by the internal combustion engine in a reciprocating motion powered pump piston having a pump working space limited, with a pressure chamber of the Fuel injector is connectable, the one Injection valve member, through which at least one Injection opening is controlled and by the in the Pressure chamber prevailing pressure against a closing force in an opening direction for releasing the at least one Injection opening is movable.
  • It is a first electric actuated control valve provided between two Switching positions is switchable and through the one Connection of pump work space with a discharge chamber is controlled.
  • a second is electric actuated control valve provided by the in a Control pressure chamber is controlled by the pressure prevailing pressure the injection valve member is acted upon in the closing direction is.
  • the control pressure chamber has a connection with the Pump working space on and through the second control valve a connection of the control pressure chamber with a Relief space controlled.
  • WO 01 14724 A is a fuel injection device known, with a high-pressure fuel pump and one with this connected fuel injector for each cylinder Internal combustion engine.
  • the high-pressure fuel pump has a through the internal combustion engine driven in a lifting movement Pump piston, which limits a pump working space, which with a pressure chamber of the fuel injection valve is connectable.
  • the Fuel injection valve has an injection valve member, through the at least one injection port is controlled and by the pressure prevailing in the pressure chamber against a closing force in a Opening direction for releasing the at least one injection opening is movable. It is a first electrically operated control valve provided, which is switchable between two switch positions and by connecting the pump working space with a Relief space is controlled.
  • a second electric actuated control valve provided by the in a Control pressure chamber is governed by the pressure prevailing pressure Injection valve member is acted upon in the closing direction.
  • the Fuel injection device also has a Pressure booster unit through which through the High-pressure fuel pump generated pressure can be further increased so that in the pressure chamber and the control pressure chamber, an increased pressure can be generated.
  • a third control valve is the Controlled pressure booster unit, wherein the third control valve can be switched between two switching positions. In a first Switching position is through the third control valve the Pressure intensifier unit connected to the pump work space and from a discharge space separated and in a second switching position is by the third control valve, the pressure booster unit from Pump work room separated and connected to the discharge room.
  • a fuel injection with increased Pressure possible, however, the course of the fuel injection during an injection cycle as in EP 0 957 261 A1 only be varied limited.
  • the fuel injection device with the Features according to claim 1 has the advantage that by the first control valve in the first switching position in the pressure chamber and in the control pressure chamber even with the Relief space associated pump work space an elevated Pressure can be maintained so that regardless of a discharge of the pump working space by means of the second Control valve, a fuel injection, in particular for a pilot injection and / or a post-injection can be controlled.
  • the pressure buildup for a Main injection can by the first control valve be controlled and the time at which the Main injection can start through the second control valve to be controlled. It is thereby a decoupling between the pressure at which the main injection starts and the time interval to a previous pilot injection allows.
  • Training according to claim 3 allows a simultaneous discharge the pump work space as well as the pressure chamber and the Control pressure chamber.
  • the training according to claim allows in a simple way controlling the pressure in the Control pressure chamber.
  • the training according to claim 5 allows an adjustment of the fuel flow in the Control pressure chamber or the fuel drain from the Control pressure chamber.
  • the training according to claim 6 allows an operation of the internal combustion engine with low noise and Schadt substances mission.
  • the embodiment according to claim 9 allows easy adjustment of the amount of fuel for the pre-injection by the time duration for which the first control valve is closed.
  • the training according to Claim 10 allows for simple and purely mechanical Way an adjustment of the amount of fuel for the Pilot injection.
  • the embodiment according to claim 14 allows a post-injection without during this by the Pump piston fuel needs to be pumped.
  • the Training according to claim 16 allows in a simple manner the implementation of a pilot injection.
  • the training according to Claim 17 enables a discharge of the pressure chamber and of the control pressure chamber.
  • FIG. 1 shows a Fuel injection device for an internal combustion engine in a schematic representation according to a first Embodiment
  • Figure 2 the Fuel injector fragmentary according to a second embodiment
  • Figure 3 shows a course of a Pressure at injection ports of a Fuel injection valve of the Fuel injection device during an injection cycle
  • FIG. 4 shows the course of the speed of a Pump piston of the fuel injector during an injection cycle.
  • FIGs 1 and 2 is a Fuel injection device for an internal combustion engine a motor vehicle shown.
  • the internal combustion engine is preferably a self-igniting internal combustion engine.
  • the Fuel injection device is preferably as trained so-called pump-nozzle system and has for each cylinder of the internal combustion engine one each High-pressure fuel pump 10 and connected to this Fuel injection valve 12, which is a structural unit are summarized.
  • the Fuel injection device as a so-called pump-line-nozzle system be trained in which also for every cylinder of the internal combustion engine the High-pressure fuel pump 10 and the Fuel injection valve 12 are provided, however, with Are spaced apart and over a pipe connected to each other.
  • the high-pressure fuel pump 10th has one in a cylinder bore 16 of a pump body 14 tightly guided pump piston 18, which by a Cam 20 of a camshaft of the internal combustion engine directly or via a transmission element, for example a Rocker arm, against the force of a return spring 19 in a lifting movement is driven.
  • the pump piston 18 limited in the cylinder bore 16 a pump working space 22, in which the delivery stroke of the pump piston 18 fuel is compressed under high pressure.
  • the pump working space 22 is by means of the delivery pressure of a feed pump 21st Fuel from a fuel tank 9 of the Motor vehicle supplied.
  • the fuel injection valve 12 has one with the Pump body 14 connected valve body 26, the may be formed in several parts, in which a Injection valve member 28 in a bore 30th is guided longitudinally displaceable.
  • the valve body 26 indicates its the combustion chamber of the cylinder of the internal combustion engine facing end region at least one, preferably a plurality Injection openings 32.
  • the injection valve member 28 has at its the combustion chamber end facing a For example, about conical sealing surface 34, which with one in the valve body 26 in the combustion chamber facing End region formed valve seat 36 cooperates, from or after which the injection openings 32 dissipate.
  • valve body 26 is between the injection valve member 28 and the bore 30 to the valve seat 36 toward an annular space 38th present, in its the valve seat 36 facing away End region by a radial extension of the bore 30 in a pressure chamber 40 surrounding the injection valve member 28 passes.
  • the injection valve member 28 has the height of the Pressure chamber 40 by a cross-sectional reduction a Pressure shoulder 42 on.
  • a biased Closing spring 44 At the end of the combustion chamber facing away from the Injector member 28 engages a biased Closing spring 44, through which the injection valve member 28th is pressed toward the valve seat 36.
  • the closing spring 44 is arranged in a spring chamber 46 of the valve body 26, the adjoins the bore 30.
  • the pressure chamber 40 has a connection 54 with the pump working space 22, the through one through the pump body 14 and the valve body 26 extending channel is formed.
  • the connection 54 becomes hereinafter referred to as pressure space connection 54.
  • the Connection 56 branches to a connection 56 to Control pressure chamber 52 from, so that the control pressure chamber 52nd also connected to the pump working space 22.
  • the Connection 56 will be referred to hereinafter as the control pressure chamber connection 56 denotes.
  • the fuel injection device has a first electrically operated control valve 60, through which a Connection 59 of the pump working chamber 22 with a Relief space is controlled than the pressure side of the Feed pump 21 and thus at least indirectly the Can serve fuel tank 9.
  • the connection 59 is hereinafter referred to as relief space connection 59 designated.
  • the first control valve 60 is upstream leading to the control pressure chamber 52 Control pressure chamber connection 56 in the pressure chamber connection 54 arranged.
  • the first control valve 60 has an actuator 61, the one Electromagnet or a piezoelectric actuator can be, the electric is controlled and by a valve member of the Control valve 60 is movable.
  • the first control valve 60 can be pressure compensated or not pressure compensated be educated.
  • the first control valve 60 is at an in Figure 1 illustrated first embodiment as a 3/2-way valve is formed and this is between two Switch positions switchable. Through the first control valve 60 is in a first switching position the Relief space connection 59 opened to the discharge space 9, so that the pump working chamber 22 with the discharge chamber. 9 is connected while the pressure chamber 40 and the Control pressure chamber 52 are separated from the pump working chamber 22.
  • a second switching position is by the first Control valve 60, the relief space connection 59 to Relief space 9 separated, so that the pump working space 22nd is separated from the discharge chamber 9, while the pressure chamber 40th and the control pressure space 52 with the pump working space 22 are connected.
  • the first control valve 60 is replaced by a electrical control device 66 in dependence on Operating parameters of the internal combustion engine between its switched over both switch positions.
  • a second electrically operated control valve 68 is provided, through the one connection 70 of the control pressure chamber 52 with a relief space, for example, at least indirectly the fuel tank 9, is controlled.
  • the Connection 70 will be referred to below as a relief room connection 70 denotes.
  • the second control valve 68 has an actuator 69, which may be an electromagnet or a piezoactuator, which is electrically controlled and by the one Valve member of the control valve 68 is movable.
  • the second Control valve 68 is preferably pressure balanced educated.
  • the second control valve 68 is as a 2/2-way valve trained by that in a first Switching the discharge space connection 70 of Control pressure chamber 52 is open with the discharge chamber 9 and by that in a second switching position the Relief space connection 70 of the control pressure chamber 52 with the Relief space 9 is disconnected.
  • a throttle point 58 is provided in the Control pressure chamber connection 56 of the control pressure chamber 52 with the Pressure chamber connection 54
  • in the relief space connection 70 of the control pressure space 52 with the discharge chamber 9 is another throttle point 71 provided.
  • the throttling points 58,71 allow a Adjustment of the inflow of fuel in the Control pressure chamber 52 and the outflow of fuel from the Control pressure chamber 52.
  • the second control valve 68 is also controlled by the controller 66.
  • the Control of the control valves 60,68 by the Control device 66 is dependent on operating parameters the internal combustion engine, such as speed, load and temperature.
  • the second control valve 68 is replaced by the Control device 66 closed.
  • the pump piston 18th while fuel is in the pressure chamber 40 and the Control pressure chamber 52 promoted.
  • the fuel injector Meanwhile 12 remains as a result of when closed second control valve 68 in the control pressure chamber 52 prevailing Pressure closed.
  • the first control valve 60 in brought his first switching position, so that the Pump working space 22 is connected to the discharge chamber 9 and the pressure chamber 40 and the control pressure chamber 52 from Pump workspace 22 are separated. In the pressure room 40 and the Control pressure chamber 52 thus remains fuel under pressure saved.
  • the second control valve 68 open, so that the control pressure chamber 52 is relieved and the Injection valve member 28 through the pressure in the room 40th prevailing pressure opens.
  • the pilot injection takes place with the pressure level below which the fuel in the pressure chamber 40th is stored.
  • the second control valve 68 by the control device 66 again closed, so that the injection valve member 28 due to the increased pressure in the control pressure chamber 52 closes. It can also several mutually remote pre-injections corresponding opening and closing of the second Control valve 68 done.
  • the first control valve 60 by the control device 66th at the beginning of the delivery stroke of the pump piston 18 in his second switching position is brought, so that the pump piston 18 with closed second control valve 68 fuel in the pressure chamber 40 and the control pressure chamber 52 promotes.
  • the first Control valve 60 by the controller 66 in his brought first switching position so that the pump working space 22 is relieved and the pressure chamber 40 and the Control pressure chamber 52 are separated from the pump working chamber 22 and fuel under pressure in the pressure chamber 40 and in the Control pressure chamber 52 is stored.
  • Control valve 68 is opened, so that the control pressure chamber 52nd is relieved and the injection valve member 28 by the in Pressure chamber 40 prevailing pressure opens.
  • the pilot injection is terminated when the pressure in the pressure chamber 40 so strong has fallen, that by the closing spring 44 on the Injector member 28 exerted force is greater than that by the pressure prevailing in the pressure chamber 40 in Opening direction on the injection valve member 28 caused Force and the injection valve member 28 closes.
  • second control valve 68 still fuel in the pressure chamber 40 and is stored in the control pressure chamber 52 under a pressure which is sufficiently high to open by opening the second Control valve 68 to perform a pilot injection.
  • first control valve 60 in its first switching position remain, since no fuel in the pressure chamber 40 and the Control pressure chamber 52 needs to be promoted.
  • the Pre-injection is terminated by the second control valve 68 is closed and / or when the pressure in the pressure chamber 40th has dropped so much that the injection valve member 28 through the closing spring 44 is closed.
  • the first Control valve 60 by the controller 66 to start the delivery stroke of the pump piston 18 in its second Switching position is brought so that the pump working space 22 is separated from the discharge chamber 9 and with the pressure chamber 40 and the control pressure chamber 52 is connected.
  • the cam 20 has such a shape that through this over a first rotation angle range a delivery stroke of the pump piston 18th is effected so that through the pump piston 18 fuel in the pressure chamber 40 and the control pressure chamber 52 at closed second control valve 68 is promoted. In a subsequent rotation angle range of the cam 20 is this shaped so that no further delivery of the Pump piston 18 takes place.
  • the speed C of Pump piston 18 in which bewirkter by the cam 20 Lifting movement over the rotation angle ⁇ of the cam 20 is in Figure 4 shown, wherein the speed during The first rotation angle range caused stroke designated I is, the speed at the following Rotation angle range of the cam 20 is zero and the Speed at by another rotation angle range of the cam 20 during a main injection Hubs is designated II. Due to the shape of the cam 20 in the first rotation angle range and thereby causing the hub Pump piston 18, the amount of fuel is determined by the Pump piston 18 in the pressure chamber 40 and the control pressure chamber 52 is promoted.
  • the second Control valve 68 opened by the control device 66 and the pilot injection is finished when the second Control valve 68 is closed and / or when the pressure in Pressure chamber 40 has dropped so much that the Injection valve member 28 by the force of the closing spring 44th is closed.
  • the first control valve 60 by the controller 66 in its second Switched position brought and the second control valve 68 is closed by the control device 66.
  • the pump piston 18 is in the pressure chamber 40 and in the Control pressure chamber 52 built high pressure, but still no injection can take place as long as the second Control valve 68 is still closed and in the control pressure chamber 52 high pressure prevails.
  • the second Control valve 68 is opened, so that the control pressure chamber 52nd is relieved.
  • the injection valve member 28 then opens the pressure prevailing in the pressure chamber 40 and the pressure Main injection begins.
  • the main injection corresponds a designated in Figure 3 with II injection phase.
  • Termination of the main injection will be the second Control valve 68 closed by the control device 66, so that the control pressure chamber 52 separated from the discharge chamber 9 is and in the control pressure chamber 52 builds high pressure, through the injection valve member 28 is closed. additionally can at the completion of the main injection and the first Control valve 60 by the controller 66 in his first switch position are brought.
  • the main injection start with high pressure, so will the first Control valve 60 by the controller 66 after the Pre-injection at an early stage of its first Switching position switched to its second switching position, so that a pressure build-up takes place.
  • the time interval of Main injection from the pilot injection is by the Time of opening of the second control valve 68 by the Control device 66 determined. If the main injection should start with a low pressure, so will the first Control valve 60 by the controller 66 after the Pre-injection closed at a later date, so that a correspondingly delayed pressure build-up takes place. Of the time interval of the main injection of the Injection is in turn by the time of the Open the second control valve 68 determines.
  • the second Control valve 68 by the controller 66 before Beginning of the main injection is opened, so that the Control pressure chamber 52 is relieved.
  • the first control valve 60 is by the controller 66 in its second Switch position brought and the main injection begins, when the pressure in the pressure chamber 40 is so high that this is the Injection valve member 28 against the force of the closing spring 44th opens.
  • the second Control valve 68 closed by the control device 66 and / or the first control valve 60 is in its first Switch position brought.
  • the post-injection is terminated by the second control valve 68 by the control device 66 is closed. It can also be several consecutive Subsequent injections take place.
  • the at the post-injection injected fuel does not need at the time of Post-injection be promoted by the pump piston 18, but is the pressure chamber 40 and the control pressure chamber 52nd taken, in which the fuel through the pump piston 18th already funded in an earlier phase of its delivery has been.
  • the first control valve 60 may after completion of the Main injection remain in its first switching position.
  • the first Control valve 60 by the controller 66 in his second switching position are brought so that through the Pump piston 18 conveyed fuel into the pressure chamber 40 becomes. If in the pressure chamber 40 and the control pressure chamber 52 of the previous main injection still fuel is stored, so needs by the pump piston 18th during the post injection only a part of for the Post-injection required amount of fuel delivered to become. If with open second control valve 68 and thus relieved control pressure chamber 52, the pressure in the pressure chamber 40 is so high that the opening force on the Injection valve member 28 is greater than that on this acting closing force, then the post-injection begins.
  • the Post-injection is terminated by the second control valve 68 is closed by the control device 66 and / or when the pressure in the pressure chamber 40 has fallen so much that the closing force on the injection valve member 28 is greater as generated by the pressure in the pressure chamber 40 Opening force and the injection valve member 28 closes.
  • the fuel injection device according to A second embodiment shown in the compared to the first embodiment only the training of the first control valve 160 is modified.
  • the first Control valve 160 is designed as a 3/3-way valve and can be switched between three switching positions. In a first switching position of the control valve 160 is through this the pump working chamber 22 with the feed pump 21 and the Relief space 9 connected and the pressure chamber 40 and the Control pressure chamber 52 are separated from the pump working chamber 22. In a second switching position of the control valve 160 is through this the pump working space 22 of the feed pump 21st or the discharge chamber 9 separated and the pressure chamber 40 and the control pressure chamber 52 are connected to the pump working space 22nd connected.
  • a third switching position of the control valve 160 is through this the pump working chamber 22 with the Feed pump 21 and the discharge chamber 9 connected and the Pressure chamber 40 and the control pressure chamber 52 are also with connected to the feed pump 21 and the discharge chamber 9.
  • the first switching position of the control valve 160 thus has the same function as the first switching position of Control valve 60 according to the first embodiment and the second switching position of the control valve 160 has the same function as the second switching position of Control valve 60 according to the first embodiment.
  • the explained above for the first embodiment Operation of the fuel injection device can thus also with the control valve 160 according to the second Embodiment can be achieved.
  • With the third Switching position of the control valve 160 is a relief of the Pump workspace 22 and the pressure chamber 40 and the Control pressure chamber 52 allows.
  • the first control valve 160 for terminating a Fuel injection that is, the pilot injection and / or the main injection and / or the Post injection, by the controller 66 in his third switch position is brought, creating a fast Relief of the pressure chamber 40 and the control pressure chamber 52nd is achieved and thus a rapid closing of the Injection valve member 28 to terminate the Fuel injection.
  • control valve 160 When the actuator 161 is de-energized, so the control valve 160 is in its first Switch position when the actuator 161 with an increased Current level is energized, so the control valve 160 in switched its third switch position and if the actuator 161 is energized with a further increased current level, so the control valve 160 is in its second switching position switched.

Claims (18)

  1. Dispositif d'injection de carburant pour un moteur à combustion interne, comportant :
    une pompe de carburant à haute pression (10) et, pour chaque cylindre du moteur, un injecteur de carburant (12) relié à la pompe (10) qui comporte un piston de pompe (18) dont la course est assurée par le moteur à combustion interne et qui délimite une chambre de travail de pompe (22) qui peut être reliée à une chambre de pression (40) de l'injecteur de carburant (12) qui présente un organe de soupape d'injection (28) qui commande au moins un orifice d'injection (32) et qui peut se déplacer contre une force de fermeture par l'action de la pression régnant dans la chambre de pression (40) dans un sens d'ouverture (29) pour libérer au moins un orifice d'injection (32),
    une première soupape de commande (60 ; 160) actionnée électriquement et qui peut être commutée entre au moins deux positions de commutation et commander au moins indirectement une liaison (59) de la chambre de travail de pompe (22) à une chambre de décharge (9 ; 21),
    une seconde soupape de commande (68) actionnée électriquement qui commande la pression qui règne dans une chambre de pression de commande (52) et qui actionne l'organe de soupape d'injection (28) au moins indirectement dans le sens de fermeture,
    caractérisé en ce que
    dans une première position de commutation, la chambre de travail de pompe (22) est reliée par la première soupape de commande (60 ; 160) à la chambre de décharge (9 ; 21) la chambre de pression (40) et la chambre de pression de commande (52) étant séparées de la chambre de travail de pompe (22), tandis que dans une seconde position de commutation, la chambre de travail de pompe (22) est séparée de la chambre de décharge (9 ; 21) par la première soupape de commande (60 ; 160), la chambre de pression (40) et la chambre de pression de commande (52) étant reliées à la chambre de travail de pompe (22).
  2. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la première soupape de commande (60) est une soupape 3/2 voies qui peut être commutée seulement entre la première et la seconde position de commutation.
  3. Dispositif d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la première soupape de commande (160) est une soupape 3/3 voies qui peut être commutée de plus dans une troisième position de commutation où la chambre de travail de pompe (22) est reliée à la chambre de décharge (9 ; 21), la chambre de pression (40) et la chambre de pression de commande (52) étant également reliées à cette chambre de décharge (9).
  4. Dispositif d'injection de carburant selon une des revendications 1 à 3,
    caractérisé en ce que
    la seconde soupape de commande (68) commande une liaison de décharge (70) reliant à la chambre de décharge (9) la chambre de pression de commande (52) qui elle-même présente une liaison de chambre de pression de commande (56) partant de la liaison de chambre de pression (54) reliant la chambre de travail de pompe (22) à la chambre de pression (40), en aval de la première soupape de commande (60 ; 160).
  5. Dispositif d'injection de carburant selon la revendication 4,
    caractérisé en ce qu'
    un point d'étranglement (58 ; 71) est prévu dans la liaison de décharge (70) conduisant de la chambre de pression de commande (52) à la chambre de décharge (9) et/ou dans la liaison (56) conduisant de la chambre de pression de commande (52) à la liaison de la chambre de pression (54).
  6. Dispositif d'injection de carburant selon la revendication 4 ou 5,
    caractérisé en ce qu'
    au début d'une course de refoulement du piston de pompe (18), la première soupape de commande (60) est amenée à sa seconde position de commutation et la seconde soupape de commande (68) est fermée, de sorte que du carburant est refoulé dans la chambre de pression (40) et dans la chambre de pression de commande (52), et au cours de la course de refoulement du piston de pompe (18), la première soupape de commande (60 ; 161) est amenée dans sa première position de commutation, tandis que pour effectuer au moins une préinjection, la seconde soupape de commande (68) est ouverte, de sorte que la chambre de pression de commande (52) est déchargée et que l'organe de soupape d'injection (28) s'ouvre sous l'action de la pression régnant dans la chambre de pression (40).
  7. Dispositif d'injection de carburant selon la revendication 6,
    caractérisé en ce que
    pour achever au moins une préinjection, la seconde soupape de commande (68) est fermée, de sorte que l'organe de soupape d'injection (28) se ferme sous l'action de la pression régnant dans la chambre de pression de commande (52).
  8. Dispositif d'injection de carburant selon la revendication 6,
    caractérisé en ce qu'
    au moins une préinjection s'achève quand la pression régnant dans la chambre de pression (40) s'est abaissée au point que l'organe de soupape d'injection (28) se ferme sous l'action de la force de fermeture (44).
  9. Dispositif d'injection de carburant selon la revendication 8,
    caractérisé en ce que
    la première soupape de commande (60 ; 160), lors de la course de refoulement du piston de pompe (18), est maintenue pendant un temps défini dans sa seconde position de commutation pour qu'une quantité de carburant définie soit refoulée dans la chambre de pression (40) et dans la chambre de pression de commande (52), de sorte qu'une préinjection allant jusqu'à la fermeture de l'organe de soupape d'injection (28) introduit une quantité définie de carburant.
  10. Dispositif d'injection de carburant selon la revendication 8,
    caractérisé en ce que
    le piston de pompe (18) est entraíné par une came (20) qui, dans une première zone angulaire de rotation, présente une forme définie de manière que le piston de pompe (18) exécute une course de refoulement définie en introduisant dans la chambre de pression (40) et dans la chambre de pression de commande (52) une quantité définie de carburant pendant la préinjection, tandis que la came (20), dans la zone angulaire de rotation qui suit, présente une forme définie de manière que le piston de pompe (18) n'effectue pas une course supplémentaire.
  11. Dispositif d'injection de carburant selon une des revendications 6 à 10,
    caractérisé en ce que
    pendant la course de refoulement du piston de pompe (18) faisant suite à au moins une préinjection, la première soupape de commande (60 ; 160) est amenée à sa seconde position de commutation et la seconde soupape de commande (68) est fermée, tandis que pour l'injection principale qui suit, cette seconde soupape de commande (68) est ouverte de sorte que la chambre de pression de commande (52) est déchargée et que l'organe de soupape d'injection (28) s'ouvre sous l'action de la pression régnant dans la chambre de pression (40).
  12. Dispositif d'injection de carburant selon une des revendications 6 à 10,
    caractérisé en ce que
    pendant la course de refoulement du piston de pompe (18) faisant suite à au moins une préinjection, la première soupape de commande (60 ; 160) est amenée à sa seconde position de commutation et la seconde soupape de commande (68) est ouverte, de sorte que la chambre de pression de commande (52) est déchargée et qu'a lieu une injection principale suivante si la pression produite par le piston de pompe (18) dans la chambre de pression (40) est suffisamment élevée pour ouvrir l'organe de soupape d'injection (28) contre l'action de la force de fermeture (44).
  13. Dispositif d'injection de carburant selon la revendication 11 ou 12,
    caractérisé en ce que
    pour achever l'injection principale, la seconde soupape de commande (68) est fermée.
  14. Dispositif d'injection de carburant selon une des revendications 11 à 13,
    caractérisé en ce qu'
    après l'injection principale a lieu au moins une injection secondaire
    pendant l'injection principale précédente, par la fermeture de la seconde soupape de commande (68) et le passage de la première soupape de commande (60 ; 160) à sa première position de commutation, du carburant sous pression est accumulé dans la chambre de pression (40) et dans la chambre de pression de commande (52),
    pour réaliser l'injection ultérieure, la seconde soupape de commande (68) est ouverte, de sorte que la chambre de pression de commande (52) est déchargée et que l'organe de soupape d'injection (28) s'ouvre sous l'action de la pression régnant dans la chambre de pression (40).
  15. Dispositif d'injection de carburant selon une des revendications 11 à 13,
    caractérisé en ce qu'
    après l'injection principale a lieu au moins une injection secondaire, et pour produire la pression nécessaire à cette injection secondaire, la première soupape de commande (60 ; 160) est amenée à sa seconde position de commutation puis, après l'injection secondaire, la seconde soupape de commande (68) est ouverte.
  16. Dispositif d'injection de carburant selon une des revendications 11 à 15,
    caractérisé en ce qu'
    après l'injection principale ou après l'injection secondaire, à la fin d'un cycle d'injection, la seconde soupape de commande (68) étant fermée et la première soupape de commande (60 ; 160) occupant sa première position de commutation, du carburant est accumulé dans la chambre de pression (40) et dans la chambre de pression de commande (52), à une pression suffisante pour que, lors du cycle d'injection qui suit, s'effectue la préinjection par ouverture de la seconde soupape de commande (68).
  17. Dispositif d'injection de carburant selon une des revendications 11 à 15,
    caractérisé en ce qu'
    après l'injection principale ou après l'injection secondaire, à la fin d'un cycle d'injection, la seconde soupape de commande (68) est ouverte si la pression dans la chambre de pression (40), à la suite d'une fuite, s'est abaissée suffisamment pour que la force produite par cette pression sur l'organe de soupape d'injection (28) dans le sens d'ouverture (29) soit inférieure à la force de fermeture (44) agissant sur l'organe de soupape d'injection (28).
  18. Dispositif d'injection de carburant selon une des revendications 3 à 17,
    caractérisé en ce que
    la première soupape de commande (160), quand une injection de carburant est achevée, est amenée à sa troisième position de commutation.
EP02022359A 2001-11-30 2002-10-08 Dispositif d'injection de carburant pour un moteur à combustion interne Expired - Lifetime EP1316717B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10158659A DE10158659A1 (de) 2001-11-30 2001-11-30 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10158659 2001-11-30

Publications (3)

Publication Number Publication Date
EP1316717A2 EP1316717A2 (fr) 2003-06-04
EP1316717A3 EP1316717A3 (fr) 2003-11-26
EP1316717B1 true EP1316717B1 (fr) 2005-08-24

Family

ID=7707433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02022359A Expired - Lifetime EP1316717B1 (fr) 2001-11-30 2002-10-08 Dispositif d'injection de carburant pour un moteur à combustion interne

Country Status (4)

Country Link
US (1) US6808124B2 (fr)
EP (1) EP1316717B1 (fr)
JP (1) JP2003172229A (fr)
DE (2) DE10158659A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10205750A1 (de) * 2002-02-12 2003-08-21 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10213025B4 (de) * 2002-03-22 2014-02-27 Daimler Ag Selbstzündende Brennkraftmaschine
US7191762B2 (en) * 2002-03-26 2007-03-20 Volvo Lastvagnar Ab Fuel injection system
EP1826397A3 (fr) * 2002-05-03 2009-08-05 Delphi Technologies, Inc. Système d'injection de carburant
US7281523B2 (en) * 2003-02-12 2007-10-16 Robert Bosch Gmbh Fuel injector pump system with high pressure post injection
US7455243B2 (en) * 2004-03-03 2008-11-25 Caterpillar Inc. Electronic unit injector with pressure assisted needle control
FR2871197B1 (fr) * 2004-06-04 2006-07-28 Renault V I Sa Injecteur pompe
DE102004028195A1 (de) * 2004-06-09 2005-12-29 Volkswagen Mechatronic Gmbh & Co. Kg Einspritzventil mit Schließdruckbeaufschlagung der Ventilnadel
US20060196974A1 (en) * 2005-03-01 2006-09-07 Caterpillar Inc. Fuel injector having a gradually restricted drain passageway
DE102005014180A1 (de) * 2005-03-29 2006-10-05 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
GB2560513A (en) * 2017-03-13 2018-09-19 Ap Moeller Maersk As Fuel injection system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118236C2 (de) * 1990-06-06 2000-02-17 Avl Verbrennungskraft Messtech Einspritzsystem für Brennkraftmaschinen
EP0805270A3 (fr) * 1993-04-09 1998-02-11 Zexel Corporation Système d'injection de carburant
JP2885076B2 (ja) * 1994-07-08 1999-04-19 三菱自動車工業株式会社 蓄圧式燃料噴射装置
GB9622335D0 (en) * 1996-10-26 1996-12-18 Lucas Ind Plc Injector arrangement
US5826561A (en) * 1996-12-10 1998-10-27 Caterpillar Inc. Method and apparatus for injecting fuel using control fluid to control the injection's pressure and time
GB9810327D0 (en) 1998-05-15 1998-07-15 Lucas Ind Plc Fuel system and pump suitable for use therein
DE19939429A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung

Also Published As

Publication number Publication date
JP2003172229A (ja) 2003-06-20
EP1316717A3 (fr) 2003-11-26
EP1316717A2 (fr) 2003-06-04
DE10158659A1 (de) 2003-06-12
US20030101968A1 (en) 2003-06-05
DE50204013D1 (de) 2005-09-29
US6808124B2 (en) 2004-10-26

Similar Documents

Publication Publication Date Title
EP1458970B1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
EP1316718A2 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
EP1316717B1 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
EP1241347B1 (fr) Dispositif d'injection de carburant dans un moteur à combustion interne
EP1260700B1 (fr) Système d'injection de carburant pour moteur à combustion interne
WO2003018990A2 (fr) Systeme d'injection de carburant pour moteur a combustion interne
DE10141679A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1243785A2 (fr) Système d'injection de carburant pour moteur à combustion interne
EP1236884B1 (fr) Dispositif d'injection de combustible pour moteurs à combustion interne
EP1312792B1 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
WO2004070201A1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1260705B1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1456525B1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1310668B1 (fr) Système d'injection de carburant pour un moteur à combustion
EP1478841B1 (fr) Dispositif d'injection de carburant d'un moteur a combustion interne
EP1318293B1 (fr) Système d'injection de carburant pour moteur à combustion interne
EP1310667A2 (fr) Système d'injection de carburant pour un moteur à combustion
EP1525390A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1260702A2 (fr) Système d'injection de carburant d'un moteur à combustion interne
EP1552138B1 (fr) Systeme d'injection de carburant destine a un moteur a combustion interne
WO2003027490A1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
WO2006018334A1 (fr) Dispositif d'injection de carburant pour un cylindre d'un moteur a combustion interne
WO2003052259A1 (fr) Dispositif d'injection de carburant conçu pour un moteur a combustion interne
EP1430216A1 (fr) Dispositif d'injection de carburant pour un moteur a combustion interne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20040526

AKX Designation fees paid

Designated state(s): DE ES FR GB IT

17Q First examination report despatched

Effective date: 20040917

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050824

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050824

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50204013

Country of ref document: DE

Date of ref document: 20050929

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20051219

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060526

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20101109

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101021

Year of fee payment: 9

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20111008

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111008

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111102

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131217

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50204013

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150501