EP1593841B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1593841B1
EP1593841B1 EP20050101642 EP05101642A EP1593841B1 EP 1593841 B1 EP1593841 B1 EP 1593841B1 EP 20050101642 EP20050101642 EP 20050101642 EP 05101642 A EP05101642 A EP 05101642A EP 1593841 B1 EP1593841 B1 EP 1593841B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
actuator
injection valve
coupler
valve according
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 - Fee Related
Application number
EP20050101642
Other languages
German (de)
English (en)
Other versions
EP1593841A1 (fr
Inventor
Dietmar Schmieder
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 EP1593841A1 publication Critical patent/EP1593841A1/fr
Application granted granted Critical
Publication of EP1593841B1 publication Critical patent/EP1593841B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9007—Ceramic materials
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim ( WO-A-02/31344 ). It is already a fuel injector from the US 2002/0139864 A1 known, comprising a valve housing, in which an actuator and a hydraulic coupler is provided, wherein the hydraulic coupler comprises a cylinder, an axially movable piston in the cylinder and a coupler gap provided between the piston and the cylinder.
  • the disadvantage is that different coupler gaps can occur due to tolerance deviations on the valve housing.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the adjustment of the coupler gap improved in a simple manner and thereby a reduction of the stroke losses is achieved by a setting means is fixed in an adjustment of the valve housing, the so on the hydraulic Coupler acts that a predetermined coupler gap is set.
  • the adjusting means is a bolt, a pin or a screw.
  • the actuator and the hydraulic coupler are arranged in an actuator chamber and the valve housing has an opening into the actuator chamber adjustment channel in which the adjusting means is arranged. In this way, the Kopplerspalteingna sued done in a final assembly step, so that the coupler gap is not adversely affected by subsequent assembly steps again.
  • the adjustment channel is provided in a first housing cover closing the valve housing at the end, since there is a sufficiently large wall thickness in the housing cover, which permits fastening of the adjustment means in the adjustment channel.
  • the adjustment means is positively, non-positively and / or materially connected to a wall of the adjustment channel, since the adjustment means is fixed in the adjustment channel in this way and enables a constant coupler gap over the entire service life of the fuel injection valve.
  • the bolt or the pin has at least one annular groove, since in this way a firmer connection between the adjusting means and the adjusting channel is achieved.
  • the adjusting means is made of ceramic or steel, since these materials have a sufficiently high strength.
  • An adjusting means made of ceramic has a bad sound conduction and advantageously does not pass on the noise emanating from the actuator to the valve housing.
  • the actuator and the hydraulic coupler are mounted between the adjusting means and the valve needle, since a simple adjustment of the coupler gap is achieved on this.
  • the adjusting means is rounded at the end facing the actuator chamber and / or conical, since in this way a gimbal bearing is achieved.
  • the drawing shows an inventive fuel injection valve.
  • the fuel injection valve is used to inject fuel into a combustion chamber of an internal combustion engine and is used for example in the so-called direct injection.
  • the fuel injection valve has a valve housing 1 with an input channel 2 for the fuel.
  • a schematically illustrated actuator 3 for the axial adjustment of a valve needle 4 is arranged in an interior 1.1 of the valve housing 1.
  • the valve needle 4 is provided axially movable in the interior 1.1 of the valve housing 1 and has, for example, a needle shaft 7 facing the actuator 3 and a valve closing body 8 facing away from the actuator 3.
  • the actuator 3 transmits its movement, for example via a so-called hydraulic coupler 9 on the needle shaft 7 of the valve needle 4, whereby the valve closing body 8 cooperating with a valve seat 10 opens or closes the fuel injection valve.
  • the valve closing body 8 lies tight against the valve seat 10 with line or surface contact over its entire circumference and forms a sealing seat 12.
  • the actuator 3 is designed as a piezoelectric or magnetostrictive actuator and arranged for example in an actuator housing 14 in order to encapsulate it in relation to the fuel.
  • the actuator housing 14 is arranged in the interior 1.1 of the valve housing 1 and designed, for example, cylindrical.
  • the actuator housing 14 has an actuator chamber 14.1, in which in addition to the actuator 3, for example, the hydraulic coupler 9 is provided.
  • the needle shaft 7 of the valve needle 4 extends in the actuator housing 14, for example, starting from the hydraulic coupler 9, in the direction of the valve seat 10 and projects through the actuator housing 14 through a passage opening 15 to outside of the actuator housing 14.
  • the passage opening 15 of the actuator housing 14 is by means of a seal 16, for example by means of a corrugated bellows, which is connected at its one end to the actuator housing 14 and at its other end to the needle shaft 7, sealed from the fuel, so that no fuel from the valve housing 1 can get into the actuator housing 14.
  • the hydraulic coupler 9 is provided, which abuts with one end face on the end of the needle shank 7 facing away from the valve closing body 8.
  • the actuator 3 is arranged, for example, on the end facing away from the needle shaft 7 front side of the hydraulic coupler 9. But it is also possible to provide the actuator 3 and the hydraulic coupler 9 in the reverse manner and to arrange the actuator 3 on the valve closing body 8 facing away from the end of the needle shank 7.
  • a piezoelectric actuator 3 consists of a plurality of piezoceramic layers, which perform an expansion in the axial direction by applying an electrical voltage. In this case, the so-called inverse piezoelectric effect is utilized in which electrical energy is converted into mechanical energy.
  • the elongation of the piezoceramic layers generated by the application of the electrical voltage is transmitted, for example, via the hydraulic coupler 9 to the valve needle 4, wherein the valve needle 4, for example, executes a stroke of 40 to 50 microns.
  • the actuator 3 shortens after switching off the electrical voltage and the valve needle 4 is moved back by means of a return spring 18 toward the valve seat 10 and closes the fuel injection valve.
  • valve housing 1, the actuator housing 14 with the actuator 3 and the hydraulic coupler 9, the valve needle 4 and the return spring 18 are arranged, for example, concentric with each other with respect to a valve axis 21 extending in the direction of the valve needle 4.
  • the hydraulic coupler 9 must compensate for the differences in the different linear expansion, to ensure that the fuel injection valve with the valve needle 4 regardless of the respective temperature of the fuel injection valve at an opening movement in each case executes the same stroke as the actuator 3. There may be no stroke losses occur in which the stroke of the actuator 3 is not completely transferred to the valve needle 4, so that the stroke of the valve needle 4th is smaller than the stroke of the actuator 3.
  • the fuel passes via the input channel 2 and a flow connection in the valve housing 1 to the valve closing body 8 upstream of the sealing seat 12.
  • the flow connection is, for example, through a first annular gap 19 between the valve housing 1 and the actuator housing 14 and through a second annular gap 20 between the valve housing 1 and Valve needle 4 is formed.
  • the hydraulic coupler 9 is clamped for example between the actuator 3 and the valve needle 4 and has, for example, a pot-shaped cylinder 23 with a pot bottom 24 and an axially movable in the pot-shaped cylinder 23 piston 25. Between the cylinder 23 and the piston 25, for example between the pot bottom 24 and the pot bottom 24 facing the end face of the piston 25, a coupler gap 26 is provided.
  • the coupler gap 26 facing away from the end face of the pot bottom 24 of the pot-shaped cylinder 23 is applied, for example, to the valve needle 4.
  • a piston rod 29 is provided, which extends axially in a direction away from the piston 25.
  • the piston rod 29 has, for example, at its end facing away from the piston 25, a head part 30, which rests, for example, on the actuator 3.
  • a compensating volume 31 is provided which is sealed by means of an elastic sealing element 32 relative to the actuator chamber 14.1 of the actuator housing 14.
  • the elastic sealing element 32 is designed for example as bellows.
  • the coupler gap 26 and the compensation volume 31 of the hydraulic coupler 9 are filled with a liquid, for example fuel or a second medium, such as silicone oil.
  • the coupler gap 26 is fluidly connected via a throttle point 34 with the compensation volume 31, for example via a gap between the cylinder 23 and the piston 25 or via at least one throttle bore in the piston 25th
  • the stroke of the actuator 3 is transmitted, for example via the head part 30, the piston rod 29, the piston 25 and the coupler gap 26 on the cylinder 23 of the hydraulic coupler 9 on the valve stem 7 of the valve needle 4.
  • a pressure is exerted on the liquid in the coupler gap 26, so that a small part of the liquid escapes via the throttling point 34 into the equalizing volume 31.
  • the leakage amount escaped from the coupler gap 26 during the stroke of the actuator 3 must be returned to the coupler gap 26 in each case between two successive strokes of the actuator 3, so that the coupler gap 26 is not gradually emptied. Since the time intervals between two strokes can be very short depending on the operating state of the internal combustion engine, the highest possible pressure in the compensation volume 31 is required for rapid refilling of the coupler gap 26.
  • the pressure in the compensating volume 31 is increased, for example, by means of a compression spring 36, which acts compressively on the compensating volume 31.
  • the compression spring 36 is clamped for example between the head part 30 and the compensating volume 31.
  • the valve housing 1 is on the front side facing the input channel 2 of a first housing cover 38 and on the valve needle 4 facing end side of a second housing cover 39 sealed.
  • the first housing cover 38 closes, for example, the input channel 2 facing the front side of the actuator housing 14.
  • the first housing cover 38 has, for example, the input channel 2 and an electrical connector, not shown, for electrical contacting of the actuator 3.
  • the coupler gap 26 is to be set to a predetermined small clearance when mounting the fuel injector to reduce lift losses in the coupler gap 26.
  • the Hublangee in the coupler gap 26 can by small leakage quantities, the Leave coupler gap 26 via the throttle point 34 in the direction of the compensating volume 31, and caused by compressibility of the liquid in the coupler gap 26.
  • an adjustment means 42 is mounted in an adjustment channel 43 of the valve housing 1, which acts on the hydraulic coupler 9 such that a predetermined coupler gap 26 is set.
  • the adjusting means 42 is arranged for example in a valve needle 4 opposite portion of the valve housing 1, which also has the input channel 2.
  • the coupler gap 26 is set, for example, to a gap in the range between XX and YY microns.
  • the input channel 2 in the first housing cover 38 has, for example, a first channel section 2.1, which is arranged centrically with respect to the valve axis 21 and runs rectilinearly in the direction of the valve axis 21, and a second channel section 2.2 which branches off from the first channel section 2.1 and into the interior 1.1 outside the actuator housing 14 opens, for example, in the first annular gap 19th
  • the adjustment means 42 is mounted in the adjustment channel 43 and has in the adjustment channel 43 a defined axial position, which remains unchanged for the life of the fuel injection valve.
  • the adjustment channel 43 extends in the first housing cover 38 from the first channel section 2.1, starting in the direction of the valve axis 21 and opens into the actuator chamber 14.1 of the actuator housing 14.
  • the diameter of the adjustment channel 43 is smaller than the diameter of the first channel section 2.1 of the input channel. 2
  • the adjusting means 42 for example, a bolt, a pin or a screw.
  • the adjusting means 42 is positively and / or non-positively and / or materially connected to a wall of the adjustment channel 43, for example, pressed into the adjustment channel 43, screwed, welded, clamped and / or glued. In this way, the adjustment means 42 is fixedly mounted in the adjustment channel 43 after assembly, and without external action in the axial direction.
  • the adjustment channel 43 has a thread.
  • the adjusting means 42 is for example made of ceramic, sintered material or metal, for example steel.
  • An adjustment means 42 made of ceramic or sintered material has the advantage that it conducts noise and vibrations poorly and in this way forwards the noise emission emanating from the actuator 3 in a damped manner to the valve housing 1.
  • the adjusting means 42 is inserted during assembly in the first channel section 2.1 and introduced by a tool from the first channel section 2.1 in the adjustment channel 43 by a predetermined insertion length, for example, pressed, wherein the diameter of the adjusting means 42 is greater than the diameter of the adjustment channel 43rd
  • the insertion of the adjusting means 42 in the adjustment channel 43 takes place, for example, in two steps, wherein the adjusting means 42 is moved in the first step by the predetermined insertion length in the adjustment channel 43 to abut against the actuator 3 or on the hydraulic coupler. In the second step, the adjusting means 42 is moved in the direction of the valve seat 10 by a further, previously determined insertion length. In this way, the adjustment of the coupler gap 26 is independent of tolerance deviations at the fuel injection valve.
  • the adjusting means 42 projects through the adjusting channel 43 into the actuator housing 14 and extends to the actuator 3 or the hydraulic coupler 9, for example the actuator 3.
  • the adjusting means 42 projects with a predetermined Matterstehin in the actuator chamber 14 and exerts against the spring force of the compression spring 36th of the hydraulic coupler 9 from a predetermined pressure force on the actuator 3 and the hydraulic coupler 9, which is greater than the spring force of the compression spring 36 and therefore the piston 25 of the hydraulic coupler 9 in the direction of the pot bottom 24 of the hydraulic coupler 9 presses, so that liquid is displaced from the coupler gap 26 through the throttle 34 in the compensating volume 31 and the coupler gap 26 is set to a predetermined level.
  • the pressure force of the compression spring 36 tries to press against the force of the adjusting means 42 liquid from the compensating volume 31 through the throttle 34 in the coupler gap 26 to move the piston 25 in this way in the pot bottom 24 facing away from the measure of the coupler gap 26 and thus to increase the longitudinal extent of the hydraulic coupler 9.
  • the actuator 3 and the hydraulic coupler 9 are clamped between the adjusting means 42 and the valve needle 4 and stored, for example gimbal.
  • the adjusting means 42 and the valve needle 4 are rounded to form a cardanic bearing, for example, at the end facing the actuator chamber 14.1 and / or tapered.
  • the adjusting means 42 for example, one or more mutually axially spaced annular grooves 44.
  • a predetermined measured in the axial direction channel length of the adjustment channel 43 to achieve a minimum pressure is required.
  • the adjustment means 42 may also be cup-shaped hollow and open towards the first channel section 2.1 (as shown for example by dashed lines), so that the pressure of the fuel of the first channel section 2.1 presses the adjustment means 42 radially outward against the wall of the adjustment channel 43.
  • the setting of the coupler gap 26 takes place, for example, in a final assembly step after the assembly of the actuator 3 and the hydraulic coupler 9 in the actuator housing 14, after assembly of the actuator housing 14, the valve needle 4 and the return spring 18 in the valve housing 1, and after the frontal Closing the valve housing 1 with the housing covers 38,39. In this way it is avoided that the coupler gap 26 could be adjusted again by subsequent assembly steps.

Claims (12)

  1. Injecteur de carburant comportant un boîtier recevant un actionneur agissant sur une aiguille d'injecteur ainsi qu'un coupleur hydraulique d'équilibrage de dilatation longitudinale,
    le coupleur hydraulique comprenant un cylindre recevant un piston mobile axialement et entre le piston et le cylindre, un intervalle de couplage rempli de liquide et restant pratiquement constant lors de la transmission de la course,
    caractérisé en ce qu'
    un moyen de réglage (42) est fixé dans le canal de réglage (43) du boîtier de soupape (1), ce moyen de réglage agissant sur le coupleur hydraulique (9) pour régler un certain intervalle de couplage (26).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le moyen de réglage (42) est un goujon, une broche ou une vis.
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'actionneur (3) et le coupleur hydraulique (9) sont installés dans une chambre d'actionneur (14.1) et le boîtier de soupape (1) comporte un canal de réglage (43) débouchant dans la chambre d'actionneur (14.1), et recevant le moyen de réglage (42).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    le canal de réglage (43) est prévu dans un premier couvercle de boîtier (38) fermant la face frontale du boîtier d'injecteur (1).
  5. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    le moyen de réglage (42) est relié à la paroi du canal de réglage (43) par une liaison par la forme, une liaison par la force et/ou une liaison par la matière.
  6. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    le moyen de réglage (42) est comprimé, vissé, soudé, brasé, serré ou collé dans le canal de réglage (43).
  7. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le goujon ou la broche comporte à la périphérie au moins une rainure annulaire (44).
  8. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le moyen de réglage (42) est en matière céramique ou en acier.
  9. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'actionneur (3) et le coupleur hydraulique (9) sont installés entre le moyen de réglage (42) et une aiguille d'injecteur (4).
  10. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le moyen de réglage (42) a une extrémité arrondie et/ou conique tournée vers la chambre d'actionneur (14.1).
  11. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le moyen de réglage (42) est prévu dans le segment du boîtier d'injecteur (1) à l'opposé de l'aiguille d'injecteur (4).
  12. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'actionneur (3) et le coupleur hydraulique (9) sont reliés en une seule pièce.
EP20050101642 2004-05-04 2005-03-03 Soupape d'injection de carburant Expired - Fee Related EP1593841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004021921 2004-05-04
DE200410021921 DE102004021921A1 (de) 2004-05-04 2004-05-04 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1593841A1 EP1593841A1 (fr) 2005-11-09
EP1593841B1 true EP1593841B1 (fr) 2007-10-17

Family

ID=34938874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050101642 Expired - Fee Related EP1593841B1 (fr) 2004-05-04 2005-03-03 Soupape d'injection de carburant

Country Status (2)

Country Link
EP (1) EP1593841B1 (fr)
DE (2) DE102004021921A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018026B4 (de) * 2006-04-19 2014-08-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE602006011587D1 (de) * 2006-06-06 2010-02-25 Continental Automotive Gmbh Verfahren zur Einstellung eines Brennstoffeinspritzventils
EP1876349B1 (fr) * 2006-07-07 2016-05-18 Continental Automotive GmbH Procédé permettant de calibrer un injectuer
DE102007026891A1 (de) * 2007-06-11 2008-12-18 Robert Bosch Gmbh Steuerventil, insbesondere für einen Kraftstoffinjektor einer Brennkraftmaschine
DE102009045009A1 (de) 2009-09-25 2011-03-31 Robert Bosch Gmbh Einspritzventil für ein Fluid
DE102009045836A1 (de) 2009-10-20 2011-04-21 Robert Bosch Gmbh Einspritzventil für ein Fluid
DE102011081343A1 (de) 2011-08-22 2013-02-28 Robert Bosch Gmbh Ventil zum Zumessen eines strömenden Mediums
DE102012202909A1 (de) * 2012-02-27 2013-08-29 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013204105A1 (de) 2013-03-11 2014-09-11 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102022206220A1 (de) * 2022-06-22 2023-12-28 Robert Bosch Gesellschaft mit beschränkter Haftung Brennstoffventil zur dosierten Abgabe von Brennstoff

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022166A (en) * 1975-04-03 1977-05-10 Teledyne Industries, Inc. Piezoelectric fuel injector valve
US6564777B2 (en) * 1999-10-15 2003-05-20 Westport Research Inc. Directly actuated injection valve with a composite needle
DE19950760A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
US6715695B2 (en) * 2000-10-11 2004-04-06 Siemens Automotive Corporation Pressure responsive valve for a compensator in a solid state actuator

Also Published As

Publication number Publication date
EP1593841A1 (fr) 2005-11-09
DE502005001701D1 (de) 2007-11-29
DE102004021921A1 (de) 2005-12-01

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