EP1284360B1 - Dispositif d'injection de carburant pour moteur à combustion interne - Google Patents

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

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Publication number
EP1284360B1
EP1284360B1 EP02016075A EP02016075A EP1284360B1 EP 1284360 B1 EP1284360 B1 EP 1284360B1 EP 02016075 A EP02016075 A EP 02016075A EP 02016075 A EP02016075 A EP 02016075A EP 1284360 B1 EP1284360 B1 EP 1284360B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
fuel injection
fuel
space
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
EP02016075A
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German (de)
English (en)
Other versions
EP1284360A2 (fr
EP1284360A3 (fr
Inventor
Peter Boehland
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
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Filing date
Publication date
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Publication of EP1284360A2 publication Critical patent/EP1284360A2/fr
Publication of EP1284360A3 publication Critical patent/EP1284360A3/fr
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Publication of EP1284360B1 publication Critical patent/EP1284360B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M59/44—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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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 injector is through the DE 28 08 731 C2 or US 5,771,865-A known.
  • This fuel injection device has a fuel injection valve, the one in a Bore of a valve body slidably guided Injection valve member, through which at least one Injection opening is controlled.
  • the injection valve member is by the in a pressure room of the Fuel injection valve prevailing pressure against the Force of a arranged in a spring chamber closing spring in an opening direction for releasing the at least one Injection opening movable.
  • In the spring room is a maintained predetermined pressure, wherein the spring chamber For example, be connected to a low pressure area can.
  • the pressure chamber of the fuel injection valve is the Fuel injection from a high pressure fuel source fed under high pressure.
  • an electric controlled valve becomes at least indirectly a connection the pressure chamber or the high pressure source with a Relief space controlled.
  • Fuel injection becomes the connection through the valve opened with the discharge space, so that the pressure in the Pressure chamber drops and the fuel injector closes.
  • the pressure in the pressure chamber falls off very sharply, so that under certain circumstances, the vapor pressure of the fuel is exceeded, so that cavitation occurs. this leads to to a lot of wear and noise, what should be avoided.
  • the fuel injection device according to the invention with the Features according to claim 1 has the advantage that through the check valve, a pressure equalization between the Pressure chamber and the spring chamber is possible when the pressure in the pressure chamber is less than in the spring chamber. This will avoided that the pressure in the pressure chamber is below the vapor pressure of the fuel drops, so that no cavitation occurs.
  • the wear and noise emission of the Fuel injection device according to the invention is characterized reduced.
  • FIG. 1 shows a Fuel injection device for an internal combustion engine in a schematic representation
  • Figure 2 a in Figure 1 with II designated section of the Fuel injection device in an enlarged view according to a first embodiment
  • Figure 3 the Section II of the fuel injection device according to a second embodiment
  • Figure 4 the Fuel injection device according to a third Embodiment.
  • FIG 1 is a fuel injection device for a Internal combustion engine, for example, a motor vehicle shown.
  • the internal combustion engine is a self-igniting Internal combustion engine and has one or more cylinders on.
  • the fuel injector points to each Cylinder on a fuel injection valve 12.
  • At the in Figure 1 illustrated embodiment of Fuel injector has this for everyone Cylinder of the internal combustion engine one High-pressure fuel pump 10 on.
  • the High-pressure fuel pump 10 and the Fuel injection valve 12 are a so-called Combined pump-nozzle unit.
  • the High-pressure fuel pump 10 and the However, fuel injector 12 may also be disconnected be arranged from each other and via a line be connected to each other.
  • the high-pressure fuel pump 10th has a pump body 14, in which in a Cylinder bore 16 a pump piston 18 is tightly guided, by a cam of a camshaft of Internal combustion engine against the force of a return spring 19 is driven in a lifting movement.
  • the pump piston 18 limited in the cylinder bore 16 a Pump work chamber 22, in which the delivery stroke of Pump piston 18 fuel is compressed under high pressure.
  • the pump working chamber 22 is at the suction stroke of the pump piston 18 fuel from a fuel tank 24th fed, for example by means of a feed pump.
  • Of the Pump work chamber 22 has a connection with a Relief space on, as the example of the Can serve fuel tank 24, and that of a electrically controlled valve 23 is controlled.
  • the electrically controlled valve 23 is connected to a Control device 25 connected.
  • the fuel injection valve 12 has a valve body 26 on, which is explained in more detail below is formed in several parts, and with the pump body 14th connected is.
  • a valve body 26 In the valve body 26 is in a bore 30th an injection valve member 28 guided longitudinally displaceable.
  • the Bore 30 extends at least approximately parallel to Cylinder 16 of the pump body 14, but may also be inclined to go to this.
  • the valve body 26 has at its the Combustion chamber of the cylinder of the internal combustion engine facing End region at least one, preferably several 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 trained, for example, also about conical valve seat 36 cooperates, from or after the discharge the injection openings 32.
  • valve body 26 is between the injection valve member 28th 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 to the Valve seat 36 facing pressure shoulder 42 on.
  • a prestressed closing spring 44 At the Combustion chamber facing away from the injection valve member 28th engages a prestressed closing spring 44, through which the Injection valve member 28 is pressed to the valve seat 36 back.
  • the closing spring 44 is arranged in a spring chamber 46, which connects to the bore 30.
  • the pressure chamber 40 is via a passage 48 extending through the valve body 26 connected to the pump working chamber 22.
  • the closing spring 44 is supported on the one hand at least indirectly, for example via a spring plate, on Injector valve member 28 and on the other hand at least indirectly, for example, also via a spring plate 51, on a bypass piston 50 from.
  • the bypass piston 50 is guided in a bore 80 of a housing part 81 and has at its the closing spring 44 facing end a Shank portion 52 which, through a connecting hole 53 in a partition wall 54 of the housing part 81 between the Spring chamber 46 and one of these in the housing part 81st subsequent memory space 55 passes.
  • the connecting hole 53 has a smaller diameter than the spring chamber 46 and the Storage space 55.
  • the bypass piston 50 has in the storage space 55 an area 56 with a larger diameter than that Connecting hole 53, so that a lifting movement of the Ausweichkolbens 50 in the spring chamber 46 in thereby is limited, that the area 56 of the bypass piston 50 at the partition 54 comes to rest as a stop.
  • the spring chamber 46 is as Hole formed in a housing part 82, which is a part of the valve body 26 forms.
  • the channel 48 passes through the Housing part 82 offset to the spring chamber 46 approximately parallel this.
  • a bore 58 to the pump working space 22nd in the housing part 81 from.
  • the bore 58 has a smaller diameter than the bore 80th
  • the Evasive piston 50 points to the bore 58 to the area 56th then a sealing surface 60, for example is formed approximately conical.
  • the sealing surface 60 acts with the mouth of the bore 58 in the storage space 55 am Housing part 81 as a seat together, which is also about may be formed cone-shaped.
  • the bypass piston 50 has a projecting into the bore 58 shaft 62, whose Diameter smaller than that of the area 56.
  • the shaft 62 has the sealing surface 60 then first a much smaller diameter than the bore 58 and towards its free end then a shaft area 64 with a diameter that is only slightly smaller than that Diameter of the bore 58.
  • the shaft portion 64 can on its periphery have one or more flats 65, through the openings between the shaft portion 64 and the Bore 58 are formed by the fuel in the Memory space 55 can get.
  • a Intermediate disc 83 is arranged, in which a bore 84th is formed, through which the bore 58 in the housing part 81st is connected to the pump working chamber 22.
  • the bore 84 represents a throttle point over which the bore 58 with the pump working chamber 22 is connected.
  • the alternate piston 50 limited in the bore 58 to the washer 83 out an antechamber 85, via the throttle point 84 with the Pump workspace 22 is connected.
  • a further housing part 86 as part of the Valve body 26 is arranged, which has a bore 87, through the one end portion of the injection valve member 28 passes and projects into the spring chamber 46.
  • the Injection valve member 28 is supported by its end in the Spring chamber 46 via a spring plate 88 on the closing spring 44 off.
  • the end portion of the injection valve member 28 has a smaller diameter than that in the bore 30th guided area.
  • the bore 30, the pressure chamber 40 as well the annular space 38, at the lower end of the valve seat 34th and the injection openings 32 are arranged are in one a part of the valve body 26 forming the valve housing 89th educated.
  • Between the housing part 86 and the Valve housing 89 is an intermediate disc 90 with less Thickness arranged.
  • the washer 90 has a bore 91, through which the end portion of the injection valve member 28 passes.
  • the channel 48 extends from the pressure chamber 40 through the Valve housing 89, the washer 90, the housing part 86th and the housing part 82.
  • the housing part 82 has on its the intermediate disc 83 side facing a groove 92, in the channel 48 opens and connected to the vestibule 85 is.
  • the channel 48 is thus on the groove 92, the vestibule 85th and the bore 84 is connected to the pump working space 22.
  • the channel 48 under Bypassing the anteroom 85 directly-via a hole in the Washer 83 is connected to the pump working chamber 22 is.
  • the washer 83 may-while on its the Pump body 14 facing side have a groove, the towards the pump working chamber 22 is open and in the channel 48 opens.
  • the groove may, for example, approximately radially to the Cylinder bore 16 extend and extends from the Cylinder bore 16 outward to the area of Washer 83, in which the channel 48 through this runs.
  • the connection of the pressure chamber 40 of the Fuel injection valve 12 with the pump working space 22nd through the channel 48 takes place in this case directly below Bypassing of the anteroom 85, of the escape piston 50 in the Bore 58 is limited to the intermediate disc 83 out.
  • the fuel injection valve 12 and the High-pressure fuel pump 10 are by means of a clamping sleeve 94th connected with each other.
  • the clamping sleeve 94 engages over Valve housing 89 and is in a threaded hole 95 in Pump body 14 screwed.
  • the washer 83, the Housing parts 81,82,86 and the washer 90 are between the valve housing 89 and the pump body 14th clamped.
  • the spring chamber 46 is connected to a low-pressure region, for example, with the fuel tank 24 or with an area where a slightly elevated pressure, for example, 2 to 5 bar is maintained.
  • Pressure chamber 40 of the fuel injection valve 12 introduces another channel 100 to the intermediate disc 90 down from, to the Channel 48 is offset in the circumferential direction and this for example, approximately diametrically opposite.
  • the channel 100 continues through the washer 90 and the housing part 86 and opens into the spring chamber 46 in the housing part 82nd Im Channel 100, a check valve 102 is arranged, the Pressure chamber 40 opens.
  • the check valve 102 has a by a closing spring 104 in the closing direction acted upon valve member 106.
  • the check valve 102 is between arranged the valve housing 89 and the washer 90.
  • the channel 100 is in the valve housing 89 to the washer 90th enlarged in diameter and in this is the Closing spring 104 and the valve member 106 is arranged.
  • the Channel 100 has a smaller one in the intermediate disk 90 Cross-section as the valve member 106, wherein the mouth of the channel 100 on the valve housing 89 side facing the intermediate disc 90 forms a valve seat 108, with the the valve member 106 cooperates and against the Valve member 106 is pressed by the closing spring 104.
  • FIG. 3 shows a second exemplary embodiment, in which the check valve 102 in the washer 90th is arranged to receive the check valve 102nd has a slightly greater thickness than the first Embodiment.
  • the channel 100 may be in the valve housing 89th run with a constant cross section and goes into the Washer 90 over.
  • the channel 100 has in the housing part 86 a smaller cross section than the valve member 106, wherein the Mouth of the channel 100 at the intermediate disc 90th facing side of the housing part 86 a valve seat 108th forms, with which the valve member 106 cooperates and against the valve member 106 is pressed by the closing spring 104 becomes.
  • the Fuel injector 12 is only for a short time Time period will be open and it will only be a small amount Fuel as a pilot injection into the combustion chamber injected.
  • the injected fuel quantity is in essentially from the opening pressure of the bypass piston 50 determined, that is the pressure in the pump working chamber 22 and in the Anteroom 85, in which the bypass piston 50 his Dodge stroke begins.
  • the opening stroke of the Injection valve member 28 during the pilot injection can be hydraulically limited by a damping device.
  • the pressure in the pump working chamber 22 continues to rise below in accordance with the profile of the pump piston 18th driving cam, so that on the Injection valve member 28 acting pressure force in Opening direction 29 increases again and due to the increased bias of the closing spring 44 increased Closing force exceeds, so that the Fuel injector 12 opens again.
  • the duration and the injected during this main injection Fuel quantity are determined by the time at which the control valve 23 by the control device 25 again is opened. After opening the control valve 23 is the Pump workspace 22 again with the Fuel tank 24 connected so that this is relieved and the fuel injection valve 12 closes.
  • the bypass piston 50 with the shaft portion 52 is replaced by the Force of the closing spring 44 back to its original position moved back.
  • the fuel injection device according to A third embodiment shown in which the Formation of the fuel injection valve 12 with the Check valve 102 is the same as the first or second Embodiment, but instead of High-pressure fuel pump 10, a high-pressure accumulator 110 as High-pressure source is used, from the fuel under high pressure supplied to the pressure chamber 40 of the fuel injection valve 12 becomes.
  • a high-pressure accumulator 110 is by a High pressure pump 112 fuel delivered.
  • an electrically controlled Valve 123 arranged by a control device 125th is controlled.
  • the high-pressure accumulator 110 serves as Pressure source for multiple fuel injection valves 12 or for all fuel injection valves 12 of the Internal combustion engine.
  • the function of the Fuel injection valve 12 with the check valve 102nd is the same as explained above.

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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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Installation d'injection de carburant pour un moteur à combustion interne comportant un injecteur de carburant (12), muni d'un organe d'injecteur (28), mobile dans un corps de soupape (26), qui commande au moins une ouverture d'injection (32) et qui, du fait de la pression qui règne dans une chambre de pression (40) de l'injecteur de carburant (12), est mobile en direction d'ouverture (29) contre la force d'un ressort de fermeture (44) placé dans une chambre de ressort (46), du carburant sous haute pression étant conduit d'une source de haute pression (10, 110) jusqu'à la chambre de pression (40) de l'injecteur de carburant (12) pour injecter du carburant, et comportant une soupape (23 ; 123) à commande électrique qui commande au moins indirectement une liaison de la chambre de pression (40) à une chambre de décharge (24) et qui relie la chambre de pression (40) à la chambre de décharge (24) afin de terminer l'injection du carburant,
    caractérisée en ce que
    la chambre de pression (40) de l'injecteur de carburant (12) présente une liaison (100) à la chambre de ressort (46), un clapet anti-retour (102) ouvert vers la chambre de pression (40) étant placé dans cette liaison.
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la chambre de ressort (46) est reliée à une zone basse pression où est maintenue une pression relativement faible.
  3. Installation d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    le clapet anti-retour (102) présente un organe de soupape (106) sur lequel agit un ressort de fermeture (104) dans sa direction de fermeture.
  4. Installation d'injection de carburant selon l'une des revendications 1 à 3,
    caractérisée en ce que
    sa source de haute pression est une pompe de carburant à haute pression (10), distincte pour chaque injecteur de carburant (12), grâce à laquelle du carburant est conduit à la chambre de pression (40) de l'injecteur de carburant (12).
  5. Installation d'injection de carburant selon l'une des revendications 1 à 3,
    caractérisée en ce que
    sa source de haute pression est un réservoir de haute pression (110) destiné à plusieurs injecteurs de carburant (12) et vers lequel du carburant est refoulé à l'aide d'une pompe à haute pression (112) et à partir duquel du carburant est conduit à la chambre de pression (40) de l'injecteur de carburant (12).
  6. Installation d'injection de carburant selon l'une des revendications précédentes,
    caractérisée en ce que
    le corps de soupape (26) de l'injecteur de carburant (12) est formé de plusieurs parties et présente une cage de soupape (89) et une rondelle (90) appliquée contre celui-ci vers la chambre de ressort (46), et
    le clapet anti-retour (102) comporte un organe de soupape (106), placé dans la cage de soupape (89), qui interagit avec un siège de soupape (108) formé sur la rondelle (90).
  7. Installation d'injection de carburant selon l'une des revendications 1 à 5,
    caractérisée en ce que
    le corps de soupape (26) de l'injecteur de carburant (12) est formé de plusieurs parties et comporte un boítier de soupape (89) ainsi qu'une rondelle (90) appliquée à celui-ci et une cage (82),
    et le clapet anti-retour (102) est placé dans la rondelle (90) ou dans le boítier de soupape (89).
EP02016075A 2001-08-10 2002-07-19 Dispositif d'injection de carburant pour moteur à combustion interne Expired - Lifetime EP1284360B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10139545A DE10139545A1 (de) 2001-08-10 2001-08-10 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10139545 2001-08-10

Publications (3)

Publication Number Publication Date
EP1284360A2 EP1284360A2 (fr) 2003-02-19
EP1284360A3 EP1284360A3 (fr) 2004-03-17
EP1284360B1 true EP1284360B1 (fr) 2005-05-18

Family

ID=7695168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02016075A Expired - Lifetime EP1284360B1 (fr) 2001-08-10 2002-07-19 Dispositif d'injection de carburant pour moteur à combustion interne

Country Status (4)

Country Link
US (1) US6817547B2 (fr)
EP (1) EP1284360B1 (fr)
JP (1) JP2003106242A (fr)
DE (2) DE10139545A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006026877A1 (de) * 2006-06-09 2007-12-13 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
EP2077390B1 (fr) * 2008-01-07 2012-09-05 Continental Automotive GmbH Agencement de couplage et ensemble de connexion

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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DE4004610A1 (de) * 1989-04-21 1990-10-25 Bosch Gmbh Robert Kraftstoffeinspritzanlage, insbesondere pumpeduese, fuer brennkraftmaschinen
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US6257499B1 (en) * 1994-06-06 2001-07-10 Oded E. Sturman High speed fuel injector
US5611317A (en) * 1995-08-09 1997-03-18 Cummins Engine Company, Inc. Open nozzle fuel injector having drive train wear compensation
JPH09209867A (ja) * 1996-02-07 1997-08-12 Mitsubishi Motors Corp 燃料噴射装置
DE19752834A1 (de) * 1997-11-28 1999-06-02 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen

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US6817547B2 (en) 2004-11-16
EP1284360A2 (fr) 2003-02-19
DE50203132D1 (de) 2005-06-23
DE10139545A1 (de) 2003-02-20
EP1284360A3 (fr) 2004-03-17
JP2003106242A (ja) 2003-04-09
US20030042334A1 (en) 2003-03-06

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