EP1073836B1 - Ensemble buse pour le dosage de liquides ou de gaz - Google Patents

Ensemble buse pour le dosage de liquides ou de gaz Download PDF

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Publication number
EP1073836B1
EP1073836B1 EP00907430A EP00907430A EP1073836B1 EP 1073836 B1 EP1073836 B1 EP 1073836B1 EP 00907430 A EP00907430 A EP 00907430A EP 00907430 A EP00907430 A EP 00907430A EP 1073836 B1 EP1073836 B1 EP 1073836B1
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EP
European Patent Office
Prior art keywords
nozzle
nozzle unit
unit
metering
needle
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
EP00907430A
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German (de)
English (en)
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EP1073836A1 (fr
Inventor
Friedrich Boecking
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
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1073836A1 publication Critical patent/EP1073836A1/fr
Application granted granted Critical
Publication of EP1073836B1 publication Critical patent/EP1073836B1/fr
Anticipated expiration legal-status Critical
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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the present invention relates to a nozzle unit for Dosing of liquids or gases, with one Nozzle body and one in a guide hole of the Nozzle body between an open and a closed Position slidably guided nozzle needle, the Nozzle needle controls at least one metering opening and in the closed position on a sealing seat of the nozzle body rests.
  • the invention also relates to a metering valve for Dosing liquids or gases, with a Nozzle unit and an actuator unit for actuating the Nozzle unit.
  • Such nozzle units and metering valves are in different embodiments from the prior art Technology known.
  • the known metering valves are, for example, as Injectors for fuel injection systems from Internal combustion engines trained.
  • Such metering valves have a nozzle unit for metering fuel and a Actuator unit for actuating the nozzle unit.
  • the Nozzle unit has a nozzle body along which a guide hole is made in the longitudinal axis.
  • the pilot hole is a nozzle needle between an open one and slidably guided in a closed position.
  • At the lower end of the nozzle unit is on the nozzle body Sealing seat trained. Are outside the sealing seat introduced several orifices in the nozzle body, the extend radially outward from the guide bore.
  • the nozzle needle In the course of the opening stroke, the nozzle needle is removed from the Seal seat is lifted outwards and fuel can run out the nozzle unit through the metering openings.
  • the flow rate in the course of the opening stroke from the open nozzle unit emerging fuel throttled by the cross-sectional area that is between the nozzle needle and the sealing seat opens. Only with relative The cross-sectional area is the wide open nozzle unit between the nozzle needle and the sealing seat larger than that Cross-sectional area of the metering openings. Then the Flow rate from the cross-sectional area of the Orifices throttled.
  • the nozzle unit described So has a so-called seat throttling.
  • Such Nozzle unit is for example from DE 27 11 902 A. known.
  • the known nozzle unit opens to the outside.
  • One after outside opening nozzle unit is also called an A nozzle, or a Metering valve with one that opens outwards Nozzle unit also called A-valve.
  • a problem with the A-nozzles or the A-valves represent the opening direction the nozzle needle to the outside.
  • Vario nozzles known that have no seat restriction In the known Vario nozzles, the nozzle needle is in the closed position of the nozzle unit also on the Seals and seals one or more metering openings. In the course of the opening stroke, the nozzle needle is removed from the Sealing seat lifted outwards. The metering openings are however only released when the nozzle needle one Tothub has overcome. When the dead stroke has been overcome between the nozzle needle and the sealing seat Opened cross-sectional area that is larger than that Cross-sectional area of the metering openings is. In the further Course of the opening stroke, after overcoming the dead stroke, the metering openings are released and it can Fuel through the metering openings from the nozzle unit stepping out. The flow rate of the through the open Nozzle unit emerging fuel is from the Cross-sectional area of the metering openings throttled; Vario nozzle so have no seat throttling.
  • the Vario nozzles known from the prior art are designed as A nozzles.
  • the metering openings are in the Nozzle needle inserted and run radially outwards.
  • the outer mouths are located within the dead stroke of the metering openings within the guide bore and closed by the inner wall of the nozzle body.
  • the nozzle needle In the open position of the nozzle unit, outside the Dead Stops, the nozzle needle is so far out of the pilot hole pulled out that the metering orifices from the nozzle body step out and the mouths are released so that Fuel through the metering openings from the nozzle unit can come out.
  • the movable metering openings cannot with the known Vario nozzles over the entire Opening stroke constant direction and shape from the Guaranteed metering openings emerging beam become. Because the noise level, the exhaust gas behavior and the consumption of the internal combustion engine also from the direction and the shape of the fuel jet can be influenced a bad thing with the known Vario nozzles Noise, exhaust gas and / or consumption behavior of the
  • the known vario nozzles have the disadvantage that that after activation of the actuator unit the high pressure to Actuation of the nozzle unit within the dead stroke in one Guide gap between the nozzle body in the area of Guide bore and the nozzle needle.
  • the high pressure is particularly in the outward area of the guide gap and can lead to a pushing out of a lead a small amount of fuel out of the guide gap, even though the nozzle unit is inside the dead stroke and no fuel comes out of the nozzle unit should.
  • the one pushed out of the guide gap Amount of fuel can enter the combustion chamber Internal combustion engine and deteriorate the noise, exhaust gas and / or consumption behavior of the Lead internal combustion engine.
  • the invention is based on of the nozzle unit of the type mentioned above that the nozzle needle opens inwards and has a dead stroke, the nozzle needle during the dead stroke the or each Metering opening covered so that no liquid or no gas through the at least one The metering opening emerges from the nozzle unit.
  • the nozzle needle lies in the nozzle unit according to the invention in the closed position of the nozzle unit on the Seals and seals one or more metering openings.
  • the metering openings preferably extend in the Nozzle body radially outwards from the guide hole the outer circumference of the nozzle body.
  • the nozzle needle lies over the inner mouths of the Orifices.
  • the inner mouths of the metering openings are closed by the outer wall of the nozzle needle. in the The nozzle needle of the Sealing seat lifted inwards. Only then will you open when the nozzle needle has overcome the dead stroke.
  • the nozzle unit according to the invention is a so-called. Vario nozzle without seat restriction.
  • the nozzle unit according to the invention also opens inwards. This creates at the front end of the nozzle unit no space problems due to the course of the Opening strokes coming out of the nozzle body Nozzle needle. They are also in the nozzle body trained metering openings arranged stationary and do not move with the during the opening stroke Nozzle needle. This allows one over the entire opening stroke constant direction and shape of the from the Dosing openings emerging jet of the to be dosed Medium are guaranteed.
  • the direction and shape of the Beam can according to the external requirements, for example. according to a desired noise, exhaust and / or Consumption behavior of an internal combustion engine, exactly be defined and fixed.
  • the nozzle unit according to the invention connects in the advantages of a vario nozzle for the first time with the advantages of an inward opening I-nozzle.
  • the nozzle unit as a Injector for a fuel injection system Internal combustion engine is formed.
  • the Nozzle unit as an injector for a common rail (CR) injection system an internal combustion engine.
  • CR common rail
  • Inlet line is formed in an annular chamber opens out on the inner circumference of the guide bore is formed, the annular chamber at least in the closed position of the nozzle unit with one in the Nozzle needle trained cross hole is connected, one of which has a longitudinal bore formed in the nozzle needle branches off at the tip of the nozzle needle into a Pressure chamber opens.
  • a liquid or a gas with the nozzle unit according to the invention is within Nozzle unit, more precisely within the feed line, the annular chamber, the transverse bore, the longitudinal bore and the Pressure chamber, a high pressure is built up.
  • the Indian Pressure chamber built up high pressure acts on a surface the tip of the nozzle needle inside the sealing seat and causes the nozzle needle to move in the direction of the open position. After overcoming the dead stroke, one can certain amount of liquid or gas through the Step out the metering openings from the nozzle unit.
  • the pressure chamber is advantageously in the closed one Position of the nozzle unit upwards from the nozzle needle, down from the nozzle body and laterally through the Sealed seat limited.
  • the pressure chamber advantageously upwards from the nozzle needle, downwards from the nozzle body and laterally through the inner wall of the Nozzle body in the area of the guide bore and one Lead between the guide hole and the Nozzle needle limited.
  • the open position of the Nozzle unit outside the dead stroke opens the pressure chamber in the at least one metering opening. In this position can be a certain amount of a medium to be dosed emerge from the nozzle unit through the metering openings.
  • the ring chamber is in the open position of the nozzle unit outside the dead stroke preferably from the outer wall of the Nozzle needle limited.
  • the connection between the Annulus and cross hole in the open position interrupted outside the dead stroke. In this position then no further medium to be dosed from the Flow into the pressure chamber. In this way, the Amount of medium to be dosed in the open Position outside the dead stroke from the nozzle unit should emerge on the volume of the transverse bore, the Longitudinal bore and the pressure chamber are limited.
  • an annular leakage chamber is formed, of which a leakage line branches off. Only in the area of Guide gap between the annular chamber and the Leakage chamber is high pressure within the dead stroke the inflow. In the rest of the area Guide gap, especially at the front of the Leadership gap, is a much lower one Leakage pressure. This training can prevent be that at the front end of the nozzle unit within the Tothubs a small amount of the medium to be dosed the guide gap is pushed out.
  • first metering openings in the nozzle body trained, over which several second metering openings are formed wherein the first metering openings a have a smaller cross-sectional area than the second Orifices.
  • the metering openings preferably have one circular cross-sectional area.
  • Opening strokes become the first and second metering openings released one after the other so that the medium to be dosed first only from the first and then from the first and the second metering openings can emerge.
  • an internal combustion engine can from amount of fuel emerging from the first metering openings Pilot injection and that a little later from the first and second metering openings emerging fuel quantity to Main injection can be used.
  • An even greater variability in the dosage of the dosing medium can be advantageously achieve that in the nozzle body with several orifices an elongated cross-sectional area are formed, wherein the longitudinal axes of the cross-sectional areas parallel to the Longitudinal axis of the nozzle unit run.
  • the size of the effective cross-sectional area of the metering orifices is in the open position of the nozzle unit outside the dead stroke determined by the opening stroke of the nozzle needle.
  • Another object of the present invention is in a metering valve of the type mentioned create that has a nozzle unit, on the one hand has no seat restriction, but on the other hand the does not have disadvantages mentioned at the beginning.
  • the invention is based on of the metering valve of the type mentioned above that the Nozzle unit as a nozzle unit according to one of the claims 1 to 11 is formed.
  • the feed line via a Inlet throttle opens into a valve control chamber, from which via a flow restrictor and a control valve Branch pipe branches.
  • a feed line Pump arrangement promoted in the nozzle unit. at open control valve, the pumped medium from the Inlet line via the inlet throttle, the valve control room and the discharge throttle flow into the discharge line.
  • the Nozzle unit of the metering valve according to the invention is through Activation of the actuator unit actuated. Through the Activation of the actuator unit, the control valve in the Drain line closed. Flows through the supply line medium still to be dosed into the nozzle unit.
  • the nozzle needle Due to the pressure build-up act on the nozzle needle different powers.
  • the nozzle needle is through the spring force of a nozzle spring in the closed Position pressed.
  • the rear end opens the needle in the valve control room.
  • the one in the Valve control chamber pressure acts on the surface of the in the valve control space protruding end of the nozzle needle and generates a control force through which the nozzle needle enters the closed position is pressed.
  • it works pressure built up in the pressure chamber on an area on the Tip of the nozzle needle and generates an actuating force, through which the nozzle needle is pressed into the open position becomes.
  • FIG a preferred embodiment in its entirety marked with the reference number 1.
  • Metering valve 1 is used for dosing liquids or gases. It points a nozzle unit 2 and an actuator unit 3 for actuating the Nozzle unit 2.
  • the actuator unit 3 is for example as an electromagnet or a piezoelectric actuator educated.
  • the metering valve 1 is an injector for a common rail injection system of an internal combustion engine educated.
  • the metering valve 1 is by means of a Clamping nut 10 attached to the internal combustion engine in such a way that the tip of the nozzle unit 2 in the combustion chamber of the Internal combustion engine protrudes.
  • the nozzle unit 2 has a nozzle body 4 and an in a guide bore 5 of the nozzle body 4 between one open and a closed position guided nozzle needle 6. At the tip of the nozzle unit 2 two metering openings 9 open into the guide bore 5.
  • the Nozzle needle 6 controls the two metering openings 9. In the closed position, the nozzle needle 6 is on a Sealing seat 8 of the nozzle body 4 and prevents that Fuel escapes through the metering openings 9 the nozzle unit 2. In FIG. 1, the nozzle unit 2 is in shown the closed position. In the open Position, the nozzle needle 6 is lifted from the sealing seat 8 and after overcoming a dead stroke (HT) allows that Fuel escaping from the metering openings 9.
  • HT dead stroke
  • An inlet line 11 is formed in the nozzle body 4, which opens into an annular chamber 12, which on the inner circumference the guide bore 5 is formed.
  • the annular chamber 12 is in the closed position with the nozzle needle 6 a transverse bore 13 formed in the nozzle needle 6 Connection.
  • Of the transverse bore 13 also branches in from the nozzle needle 6 formed longitudinal bore 14 from the tip of the nozzle needle 6 opens into a pressure chamber 15.
  • the feed line 11 also opens out via a Inlet throttle 16 in a valve control chamber 17. From the Valve control chamber 10 branches via an outlet throttle 18 and a control valve 19 from a drain line 20.
  • the actuator unit 3 activated, whereby the control valve 19 is closed.
  • the fuel delivered by the pump arrangement is now not can drain more, is in the valve control chamber 17 Inlet line 11, the annular chamber 12, the transverse bore 13, the longitudinal bore 14 and a pressure in the pressure chamber 15 built up. Act on the nozzle needle 6 of the nozzle unit 2 now different powers.
  • the nozzle needle 6 is one by the spring force Nozzle spring 21 pressed into the closed position.
  • the a surface 6a acts at the rear end of the nozzle needle 6, also acts a control force on the nozzle needle 6 and pushes it into the closed position.
  • the pressure built up in the pressure chamber 15 acts on a Surface 6b at the tip of the nozzle needle 6 and generates one Operating force through which the nozzle needle 6 into the open Position is pressed.
  • the dead stroke (HT) has occurred between the sealing seat 8 and the nozzle needle 6 already have a cross-sectional area opened that is larger than the cross-sectional area of the Metering openings 9 is. Therefore the flow rate of the emerging from the open nozzle unit 2 Fuel from the cross-sectional area the metering openings 9 throttled.
  • the nozzle unit 2 of the Metering valve 1 according to the invention is therefore as one Vario nozzle without throttling.
  • the nozzle unit 2 can thus be three different ones Take positions. In the closed position the pressure chamber 15 upward from the surface 6b to the top the nozzle needle 6, down from the nozzle body 4 and limited laterally by the sealing seat 8. In the open Position of the nozzle unit 2 becomes the pressure chamber 15 within the dead stroke (hT) up from the top of the Nozzle needle 6, down from the nozzle body 4 and laterally through the guide bore 5 and the guide seat 22 between the guide bore 5 and the nozzle needle 6 limited. In the open position of the nozzle unit 2 outside the dead stroke (hT), the pressure chamber 15 opens into the Metering openings 9.
  • a annular leakage chamber 23 formed, one of which Leakage line 24 branches off and into the drain line 20 empties. Due to the leakage chamber 23 is only in the area of the guide gap between the annular chamber 12 and the leakage chamber 23 in the nozzle unit 2 pressure built up. In the rest of the area Guide gap between the leakage chamber 23 and the Pressure chamber 15 is only a much smaller one Leakage pressure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (14)

  1. Ensemble buse (2) pour le dosage de liquides ou de gaz, comprenant un corps de buse (4) et une aiguille d'injection (6) guidée de manière mobile dans un trou de perçage (5) du corps de buse (4) entre une position ouverte et une position fermée, l'aiguille d'injection étant posée en position fermée sur un logement d'étanchéité (8) du corps de buse (4), moyennant quoi au moins un orifice de mesure (9) réglable par l'aiguille d'injection (6) et débouchant dans le trou de perçage (5) est conçu dans le corps de buse (4),
    caractérisé en ce que
    l'aiguille d'injection (6) s'ouvre vers l'intérieur et comporte une course à vide (hT), l'aiguille d'injection (6) recouvrant l'un ou l'autre des orifices de mesure (9) pendant la course à vide (hT) de manière à ce qu'aucun liquide et/ou aucun gaz ne sorte de l'ensemble buse (2) par au minimum un orifice de mesure (9).
  2. Ensemble buse (2) selon la revendication 1,
    caractérisé en ce que
    l'ensemble buse (2) est conçu comme un injecteur pour un système d'injection de carburant d'un moteur à combustion interne.
  3. Ensemble buse (2) selon la revendication 2,
    caractérisé en ce que
    l'ensemble buse (2) est conçu comme un injecteur pour un système d'injection « common-rail » d'un moteur à combustion interne.
  4. Ensemble buse (2) selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce qu'
    une conduite d'arrivée (11) est conçue dans le corps de buse (4), laquelle conduite d'arrivée (11) débouche dans une chambre annulaire (12) conçue sur la périphérie intérieure du trou de perçage (5), la chambre annulaire (12) étant reliée au moins en position fermée de l'ensemble buse (2) à un alésage transversal (13) conçu dans l'aiguille d'injection (6) d'où bifurque un alésage longitudinal (14) conçu dans l'aiguille d'injection (6) pour déboucher sur la pointe de l'aiguille d'injection (6) dans une chambre de compression (15).
  5. Ensemble buse (2) selon la revendication 4,
    caractérisé en ce qu'
    en position fermée de l'ensemble buse (2), la chambre de compression (15) est limitée vers le haut par l'aiguille d'injection (6), vers le bas par le corps de buse (4) et sur les côtés par le logement d'étanchéité (8).
  6. Ensemble buse (2) selon la revendication 4 ou 5,
    caractérisé en ce qu'
    en position ouverte de l'ensemble buse (2) dans la course à vide (hT), la chambre de compression (15) est limitée vers le haut par l'aiguille d'injection (6), vers le bas par le corps de la buse (4) et sur les côtés par la paroi intérieure du corps de buse (4) dans la zone du trou de perçage (5) et par un logement de perçage (22) entre le trou de perçage (5) et l'aiguille d'injection (6).
  7. Ensemble buse (2) selon l'une quelconque des revendications 4 à 6,
    caractérisé en ce qu'
    en position ouverte de l'ensemble buse (2) en dehors de la course à vide (hT), la chambre de compression (15) débouche au moins dans un orifice de mesure (9).
  8. Ensemble buse (2) selon l'une quelconque des revendications 4 à 7,
    caractérisé en ce qu'
    en position ouverte de l'ensemble buse (2) en dehors de la course à vide (hT), la liaison entre la chambre annulaire (12) et l'alésage transversal (13) est interrompue.
  9. Ensemble buse (2) selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce qu'
    une chambre de vidange annulaire (23) d'où bifurque une conduite de vidange (24) est conçue sur la périphérie intérieure du trou de perçage (5) entre la chambre toroïdale (12) et la chambre de compression (15).
  10. Ensemble buse (2) selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    plusieurs premiers orifices de mesure (9a) sont conçus dans le corps de buse (4), au-dessus desquels sont conçus plusieurs deuxièmes orifices de mesure (9b), les premiers orifices de mesure (9a) comportant une surface de coupe transversale plus petite que celle des deuxièmes orifices (9b).
  11. Ensemble buse (2) selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce que
    plusieurs orifices de mesure (9c) sont conçus dans le corps de buse (4) avec une surface de coupe transversale oblongue, les axes longitudinaux des surfaces de coupe transversale étant parallèles à l'axe longitudinal de l'ensemble buse (2).
  12. Ensemble de mesure (1) pour le dosage de liquides ou de gaz, comprenant un ensemble buse (2) et un ensemble actionneur (3) pour actionner l'ensemble buse (2),
    caractérisé en ce que
    l'ensemble de mesure (1) comporte un ensemble buse (2) selon l'une quelconque des revendications 1 à 11.
  13. Ensemble de mesure (1) selon la revendication 12,
    caractérisé en ce que
    la conduite d'arrivée (11) débouche via un étranglement d'arrivée (16) dans une chambre de commande à soupapes (17) d'où bifurque un conduit de décharge (20) via un étranglement de sortie (18) et une soupape de commande (19).
  14. Ensemble de mesure (1) selon la revendication 12 ou 13,
    caractérisé en ce que
    l'ensemble actionneur (3) est conçu comme un électroaimant ou comme un actionneur piézoélectrique.
EP00907430A 1999-02-20 2000-01-14 Ensemble buse pour le dosage de liquides ou de gaz Expired - Lifetime EP1073836B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19907356 1999-02-20
DE19907356A DE19907356A1 (de) 1999-02-20 1999-02-20 Düseneinheit zur Dosierung von Flüssigkeiten oder Gasen
PCT/DE2000/000123 WO2000049287A1 (fr) 1999-02-20 2000-01-14 Ensemble buse pour le dosage de liquides ou de gaz

Publications (2)

Publication Number Publication Date
EP1073836A1 EP1073836A1 (fr) 2001-02-07
EP1073836B1 true EP1073836B1 (fr) 2004-10-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00907430A Expired - Lifetime EP1073836B1 (fr) 1999-02-20 2000-01-14 Ensemble buse pour le dosage de liquides ou de gaz

Country Status (4)

Country Link
EP (1) EP1073836B1 (fr)
JP (1) JP2002537516A (fr)
DE (2) DE19907356A1 (fr)
WO (1) WO2000049287A1 (fr)

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JP2002130087A (ja) 2000-10-23 2002-05-09 Toyota Motor Corp 筒内噴射式内燃機関用燃料噴射弁
DE10157886B4 (de) * 2000-11-27 2009-12-17 DENSO CORPORATION, Kariya-shi Kraftstoffeinspritzeinheit eines Verbrennungsmotors
DE10148350A1 (de) * 2001-09-29 2003-04-24 Bosch Gmbh Robert Kraftstoff-Einspritzvorrichtung, insbesondere Injektor für Brennkraftmaschinen mit Direkteinspritzung, sowie Kraftstoffsystem und Brennkraftmaschine
WO2008017614A1 (fr) * 2006-08-09 2008-02-14 Siemens Aktiengesellschaft Dispositif d'injection de combustible pour un moteur à combustion

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US3131866A (en) * 1961-12-07 1964-05-05 Clessie L Cummins Fuel injector
DE2711902A1 (de) * 1977-03-18 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
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JPH08144896A (ja) * 1994-11-25 1996-06-04 Zexel Corp 可変噴孔型燃料噴射ノズル
AT2164U3 (de) * 1997-08-07 1999-02-25 Avl List Gmbh Einspritzdüse für eine direkt einspritzende brennkraftmaschine
DE19755057A1 (de) * 1997-12-11 1999-06-17 Bosch Gmbh Robert Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen

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DE19907356A1 (de) 2000-10-12
WO2000049287A1 (fr) 2000-08-24
EP1073836A1 (fr) 2001-02-07
DE50008301D1 (de) 2004-11-25
JP2002537516A (ja) 2002-11-05

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