EP0515810B1 - Dispositif d'injection d'un mélange combustible/gaz - Google Patents

Dispositif d'injection d'un mélange combustible/gaz Download PDF

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Publication number
EP0515810B1
EP0515810B1 EP92106218A EP92106218A EP0515810B1 EP 0515810 B1 EP0515810 B1 EP 0515810B1 EP 92106218 A EP92106218 A EP 92106218A EP 92106218 A EP92106218 A EP 92106218A EP 0515810 B1 EP0515810 B1 EP 0515810B1
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EP
European Patent Office
Prior art keywords
gas
valve
appliance according
fuel injection
fuel
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
EP92106218A
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German (de)
English (en)
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EP0515810A1 (fr
Inventor
Peter Dipl.-Ing.(Fh) Romann
Waldemar Hans
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0515810A1 publication Critical patent/EP0515810A1/fr
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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles

Definitions

  • the invention relates to a device for injecting a fuel-gas mixture and a method for producing a device for injecting a fuel-gas mixture according to the preamble of claim 1 and claim 15.
  • a device for injecting a fuel-gas mixture is already known, which is a throttle-pin fuel injector with a cup-shaped gas-encasing sleeve, the spray opening of which is connected to a gas ring channel with a gas ring gap the gas guide sleeve is surrounded in the immediate vicinity.
  • At least one axially extending groove-shaped gas guide channel is formed, which is delimited by the circumference of the fuel injection valve, opens into the gas ring channel and serves to supply the gas to the spray opening of the fuel injection valve.
  • the inner part of the cylinder part of the pot-shaped gas encasing sleeve lies against the circumference of the fuel injection valve, so that the gas encasing sleeve is centered in this way with respect to the fuel injection valve.
  • Such a pot-shaped gas encasing sleeve with axial gas guide channels formed as grooves in the inner wall of the cylinder part has a complex structure and high manufacturing costs. In order to ensure the exact centering of the gas encasing sleeve relative to the fuel injector, which is necessary for functional reasons, it is necessary to maintain very tight manufacturing tolerances which lead to expensive manufacturing.
  • the device according to the invention for injecting a fuel-gas mixture with the features of claim 1 can be produced in a very simple and inexpensive manner.
  • the guide strips, which point inwards in the radial direction and bear against the circumference of the fuel injection valve, ensure that the gas-encasing sleeve can be centered with respect to the fuel injection valve in an easily produced and exact manner.
  • the method according to the invention for producing a device for injecting a fuel-gas mixture with the features of claim 15 has the advantage of a very simple and inexpensive design of the guide strips and the through openings.
  • the device with the features of claim 3 has the advantage that the guide strips are formed simultaneously with the formation of the through openings.
  • axial gas guide channels are formed in a very simple manner between each two adjacent guide strips, through which the gas can flow in the direction of the at least one spray opening of the fuel injector.
  • the guide strips are rounded in the direction of the base part facing away.
  • gas encasing sleeve is fastened to the circumference of the valve end by means of individual welding spots or by means of a flange, so that a firm hold of the gas encasing sleeve is ensured at the valve end of the fuel injector.
  • a retaining ring is arranged on the circumference of the gas encasing sleeve, which has a U-shaped cross section that is open in the radial direction to the outside.
  • a narrow gas ring gap is formed in the axial direction between the valve end of the fuel injection valve and the bottom part of the gas encasing sleeve.
  • the fuel injection valve rests with its valve end on the bottom part of the gas encasing sleeve and at least one gas supply opening is formed in the bottom part, which is inclined in the fuel flow direction with respect to the valve longitudinal axis.
  • Figure 1 shows a partially illustrated device for injecting a fuel-gas mixture according to a first embodiment of the invention Example
  • Figure 2 shows a gas encasing sleeve according to the first embodiment
  • Figure 3 shows a section along the line 111-111 in Figure 2
  • Figure 4 shows a partially illustrated device for injecting a fuel-gas mixture according to a second embodiment of the invention
  • Figure 5 shows a gas encasing sleeve 6 shows a section along the line VI-VI in FIG. 5
  • FIG. 7 shows a partially illustrated device for injecting a fuel-gas mixture according to a fourth exemplary embodiment according to the invention.
  • the devices for the injection of a fuel-gas mixture, for example, into a mixture-compressing spark-ignition internal combustion engine, for example and partially shown in FIGS. 1, 4 and 7, consist of a cup-shaped gas-encasing sleeve 1, which concentrically with a valve longitudinal axis 3, comprises a valve end 5 of a fuel injection valve 7.
  • the gas encasing sleeve 1 surrounds the valve end 5 of the fuel injector 7 at least partially axially with a cylinder part 9 and at least partially radially with a bottom part 11.
  • the base part 11 of the gas encasing sleeve 1 has a passage opening 13.
  • the partially illustrated, electromagnetically actuated fuel injection valve 7, which is shown by way of example in FIGS. 1, 4 and 7, has a nozzle body 17 extending as far as the valve end 5 as part of a valve housing.
  • a stepped longitudinal opening 19 is formed in the nozzle body 17 and runs concentrically to the valve longitudinal axis 3.
  • a valve closing part 21 Arranged in the longitudinal opening 19 is a valve closing part 21, which cooperates with its one sealing section 23, which faces the bottom part 11 of the gas encasing sleeve 1 and tapers in the shape of a truncated cone in the fuel flow direction, with a fixed valve seat 25 of the longitudinal opening 19 of the nozzle body 17 which tapers in the shape of a truncated cone in the fuel flow direction.
  • the valve closing part 21 has, for example, two guide sections 27 which, together with a guide region 29 of the wall of the longitudinal opening 19 of the nozzle body 17, serve to guide the valve closing part 21.
  • the valve closing part 21 is connected to an armature 31, which cooperates with a magnet coil 33 partially surrounding the armature 31 in the axial direction and an inner pole 35 of the fuel injection valve 7 opposite the armature 31 in the direction of the fixed valve seat 25.
  • a return spring 37 which is supported at its other end on an adjusting sleeve 38 inserted into the inner pole 35 and which tends to move the valve closing part 21 in the direction of the fixed valve seat 25.
  • a perforated plate 41 bears directly on an end face 39 of the valve end 5 of the fuel injection valve 7 facing the base part 11 of the gas encasing sleeve 1.
  • the perforated plate 41 has, for example, two spray openings 43 through which the fuel flowing past the fixed valve seat 25 when the valve closing part 21 is lifted off and reaching an end channel 44 of the longitudinal opening 19 is emitted.
  • the devices according to the invention are e.g. mountable in a stepped valve receiving opening 47 of an intake manifold 49 of the internal combustion engine, which e.g. has a plurality of spaced apart valve receiving openings 47.
  • a gas supply channel 51 which serves to supply a gas to the gas encasing sleeve 1, opens into each of the valve receiving openings 47 at an inlet opening 52 inclined toward the valve end 5.
  • a gas e.g. the suction air branched off by a bypass in front of a throttle valve in the intake manifold 49 of the internal combustion engine, air conveyed by an additional fan, but also recirculated exhaust gas from the internal combustion engine or a mixture of air and exhaust gas are used.
  • the use of recirculated exhaust gas enables a reduction in the pollutant emissions of the internal combustion engine.
  • the guide strips 55 With their end faces 57 facing the nozzle body 17 and running in the axial direction parallel to the longitudinal axis 8 of the valve, the guide strips 55 rest with a slight radial prestress on the circumference of the valve end 5 of the fuel injector 1, the end faces 57 e.g. describe a circle.
  • the guide strips 55 serve for exact centering of the gas encasing sleeve 1 with respect to the fuel injection valve 7.
  • the guide strips 55 prefferably have their end faces 57 inclined approximately in the circumferential direction of the cylinder part 9 or obliquely with respect to the longitudinal valve axis 3 of the fuel injection valve 7.
  • the guides strips 55 In the direction facing away from the bottom part 11 of the gas encasing sleeve 1 are the guides strips 55 rounded off by means of an outwardly curved curve 59. In this way, the sliding of the gas encasing sleeve 1 onto the valve end 5 of the fuel injector 7 is facilitated and damage to the circumference of the valve end 5 by the guide strips 55 is prevented when sliding on.
  • At least one through opening 61 extending through the wall of the cylinder part 9 is formed in the cylinder part 9 of the gas encasing sleeve 1.
  • the cylinder part 9 of the gas encasing sleeve 1 has, for example, eight approximately square through openings 61.
  • inventions shown in Figures 1 to 4 and 7 have e.g. a gas encasing sleeve 1 formed from a metal sheet by forming.
  • a gas encasing sleeve 1 formed from a metal sheet by forming.
  • three first edges 63 of an almost quadrangular, rounded section 59, tab-shaped segment and a guide strip 55 are cut out of the wall of the cylinder part 9, for example by punching.
  • the tab-shaped guide strips 55 are bent inwards about a fixed second edge 65 of the segment in such a way that the almost square guide strips 55 are directed inwards in the radial direction and their end faces 57 run parallel to the longitudinal valve axis 3, whereby at the same time the almost quadrangular through openings 61 can be opened on the cylinder part 9. In this way, guide strips 55 and through openings 61 can be produced simply and inexpensively.
  • the gas passes through the through openings 61 into the radial direction through the wall of the cylinder part 9 and the circumference of the valve end 5 of the fuel injection valve 7 and through two adjacent guide strips 55 in the circumferential direction and through an adjoining one between the valve end 5 and the inner wall of the gas encasing sleeve 1 formed gas ring channel 69, which also extends between the bottom part 11 and the perforated plate 41, to the spray openings 43 of the valve end 5.
  • the bottom part 11 of the gas encasing sleeve 1 is plastically deformed, for example, in an edge region 71 adjoining the passage opening 13 in the direction of the valve longitudinal axis 3 obliquely to the valve end 5 of the fuel injection valve 7.
  • a narrowing, radially extending gas ring gap 77 is formed in the axial direction between a lower end face 73 of the perforated plate 41 and an upper end face 75 of the base part 11, which directly surrounds the passage opening 13.
  • the narrow gas ring gap 77 serves to supply the gas to the fuel discharged through the spray openings 43 of the fuel injection valve 7 and to meter the gas.
  • the gas encasing sleeve 1 is pushed so far onto the valve end 5 of the fuel injector 7 that the cylinder part 9 of the gas encasing sleeve has a stop face 83 on one end facing away from the bottom part 11, for example on a collar 81
  • Contact surface 85 of a radially outward-pointing retaining shoulder 87 of the nozzle body 17 bears.
  • the actual quantity of the gas flowing through the narrow gas ring gap 77 is then measured by means of a flow meter.
  • the desired amount of the supplied gas is adjusted in that an axial distance 89 between the contact surface 85 of the holding shoulder 87 and the edge region 71 directly surrounding the passage opening 13 on the upper end face 75 of the bottom part 11 of the gas encasing sleeve 1 is changed, whereby the axial extent 79 of the gas ring gap 77 is varied until the measured actual quantity of the gas matches the predetermined target quantity.
  • Axial depth 91 denotes the distance between the stop face 83 of the cylinder part 9 and the edge area 71 of the upper face 75 of the base part 11.
  • the extent of the cylinder part 9 in the direction of the valve longitudinal axis 3 can be reduced by using the stop face page 83 material is removed until the axial depth 91 equals the required axial distance 89.
  • the gas encasing sleeve 1 and the valve end 5 are connected to one another.
  • the axial extent 79 of the narrow gas ring gap 77 can also be set after the gas encasing sleeve 1 has been attached to the valve end 5, for example by simultaneously measuring the actual amount of gas flowing through the narrow gas ring gap 77, the bottom part 11 of the gas encasing sleeve 1 in the region of the narrow gas ring gap 77 is plastically deformed in the direction of the longitudinal axis 3 of the valve until the measured actual quantity of the gas matches the predetermined target quantity.
  • the gas encasing sleeve 1 resting on the contact surface 85 is connected to the valve end 5 of the fuel injection valve 7 by means of individual weld spots 95 formed on the cylinder part 9 of the gas encasing sleeve.
  • the second exemplary embodiment shown in FIG. 4 differs from the first exemplary embodiment only in the type of connection between the gas-encasing sleeve 1 and the valve end 5.
  • An annular groove 99 is formed on the circumference of the nozzle body 17, for example, starting from the contact surface 85.
  • the cylinder part 9 of the gas encasing sleeve 1 abuts the abutment end face 83 of the collar 81 against the contact surface 85 of the nozzle body 17, the collar 81 being deformed in the radial direction inwards, for example at several locations distributed over its circumference, in such a way that a flange connection 101 between the gas encasing sleeve 1 and the valve end 5 of the fuel injection valve 7 is formed.
  • a displacement of the gas encasing sleeve 1 in the direction of the longitudinal valve axis 3 with respect to the fuel injection valve 7 can thus be reliably and reliably prevented.
  • the gas encasing sleeve 1 can advantageously also be fastened to the valve end 5 of the fuel injection valve 7 by a pressing process, soldering or adhesive bonding.
  • an upper annular groove 103 is formed above the inlet opening 52 of the gas supply channel 51 opening into the valve receiving opening 47 of the suction pipe 49 on the circumference of the fuel injection valve 7, in which an upper sealing ring 105 is arranged, which seals between the fuel injection valve 7 and the wall the valve receiving opening 47 is used.
  • a retaining ring 109 is arranged on the circumference of the cylinder part, which has a U-shaped cross section open in the radial direction towards the outside Has.
  • the retaining ring 109 is e.g.
  • the U-shaped retaining ring 109 with its mutually opposite, lateral arms 112 extending in the radial direction, forms the side surfaces and perpendicularly with its central part 114, which runs between the two legs 112 and runs parallel to the valve longitudinal axis 3 and lies against the circumference of the cylinder part 9 the bottom of the groove of a lower annular groove 116.
  • a lower sealing ring 118 is arranged in the lower annular groove 116 and serves to seal between the gas-encasing sleeve 1 and the wall of the valve receiving opening 47.
  • FIGS. 5 and 6 show a gas encasing sleeve according to a third exemplary embodiment according to the invention, FIG. 6 showing a section along the line VI-VI in FIG. 5.
  • the same and equivalent parts are identified by the same reference numerals as in FIGS. 1 to 4.
  • This third exemplary embodiment differs from the first two exemplary embodiments by a different design of the guide strips.
  • the gas encasing sleeve 1 has on its cylinder part 9 at least three, in the third exemplary embodiment shown, for example, five web-shaped guide strips 123 arranged at the same distance from one another in the circumferential direction and pointing inward in the radial direction, and for example ten through openings 61.
  • the guide strips 123 and the through openings 61 of the gas encasing sleeve 1 are formed by cutting through the wall of the cylinder part 9 of the gas encasing sleeve 1 and pressing the guide strips inward in the radial direction.
  • Each of the web-shaped guide strips 123 has two mutually extending, parallel cutting surfaces 125 which extend, for example, approximately in the direction of a longitudinal valve axis of a fuel injector, at the valve end of which the gas-encasing sleeve 1 can be mounted, so that the guide strips 123 extend transversely to the two Cutting surface Chen 125 start at both ends 124 from the wall of the cylinder part 9.
  • two through openings 61 are formed directly adjacent to the cut surfaces 125 for each guide strip, which serve to supply the gas.
  • the guide strips 123 it is also possible for the guide strips 123 to be inclined relative to a longitudinal valve axis of a fuel injector or for the guide strips to extend approximately in the circumferential direction of the cylinder part 9.
  • the guide strips 123 have in the radial direction inwardly facing end faces 127, which run parallel to the valve longitudinal axis 3 of a fuel injector or to the cylinder part 9 of the gas encasing sleeve 1. Between the end faces 127 and the wall of the cylinder part 9, outer transition regions 126 are formed immediately adjacent to the end faces 127 and run obliquely inclined with respect to the wall of the cylinder part 9.
  • the end faces 127 of the guide strips 123 which serve to center the gas encasing sleeve 1 with respect to the fuel injection valve bear at least partially on the circumference of the valve end of the fuel injection valve with a slight radial preload.
  • the end faces 127 roughly describe a circle in circumferential view of the valve end.
  • the guide strips 123 can also, as not shown, be curved radially into the interior of the gas guide sleeve 1 starting from their ends 124 such that they have no surface running parallel to the longitudinal axis 3 of the valve.
  • FIG. 7 shows a fourth exemplary embodiment of a device for injecting a fuel-gas mixture, the same and equivalent parts being identified by the same reference numerals as in FIGS. 1 to 6.
  • This fourth exemplary embodiment essentially differs only in that Type of metering of the gas from the first exemplary embodiment shown in FIG. 1.
  • the base part 11 of the gas encasing sleeve 1 is plastically deformed in the edge region 71 adjoining the passage opening 13 in the direction of the valve longitudinal axis 3 obliquely towards the valve end 5 of the fuel injection valve 7.
  • the gas encasing sleeve 1 with an annular abutment face 130 facing the valve end 5, which forms an end of the inclined edge region 71 facing the valve end 5 and the peripheral edge of the passage opening 13, lies tightly against the lower end face 73 of the perforated plate 41.
  • gas supply openings 132 are formed which penetrate the wall of the base part 11 and which are inclined away from the valve longitudinal axis 3 in the fuel flow direction towards the valve end 5.
  • the gas supply openings 132 serve for metering the gas to the fuel discharged from the spray openings 43 through the passage opening 13.
  • the size of the opening cross section and the number of gas supply openings 132 influence the amount and the speed of the supplied gas.
  • the atomization of the fuel can also be influenced by the position of the gas supply openings 132 in the inclined edge region 71.
  • gas supply openings 132 at different heights of the base part 11, the downstream gas supply openings 132 having, for example, smaller cross sections than the ones above them.
  • the gas supply openings 132 can also have any other, for example square, oval or other opening cross section.
  • the gas that strikes the dispensed fuel through the gas supply openings 132 distributed over the bottom 11 of the gas encasing sleeve 1 produces a particularly finely atomized fuel-gas mixture.
  • the gas encasing sleeves 1, for example formed by mechanical sheet metal forming, according to the exemplary embodiments shown can consist of metallic sheet metal, such as a stainless steel alloy or aluminum. However, it is also advantageous to form the gas encasing sleeve by plastic injection molding or by die casting.
  • the device according to the invention for injecting a fuel-gas mixture with the gas encasing sleeve 1, which has guide strips 55 which point inwards in the radial direction and bear against the circumference of the fuel injection valve 7, is not only simple and inexpensive to manufacture, it also allows also an exact centering of the gas encasing sleeve 1 with respect to the fuel injection valve 7.

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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 (15)

1. Dispositif pour injecter un mélange carburant/gaz à l'aide d'un injecteur de carburant (7) comportant au moins un orifice d'éjection (43) et d'une douille d'entourage de gaz (11) en forme de pot dont la partie cylindrique (9) entoure au moins partiellement de manière axiale et dont le fond (11) entoure au moins de manière partiellement radiale, une extrémité (5) de l'injecteur de carburant (7) comportant au moins un orifice d'éjection (43) et ayant au moins un orifice de passage (13) dans le fond (11), dispositif caractérisé en ce que la partie cylindrique (9) présente au moins trois longerons de guidage (55, 123) tournés vers l'intérieur, dans la direction radiale, et qui s'appuient contre la périphérie de l'extrémité (5) de l'injecteur.
2. Dispositif selon la revendication 1, caractérisé par au moins un orifice traversant (61) réalisé dans la partie cylindrique (9) de la douille d'entourage de gaz (1).
3. Dispositif selon la revendication 2, caractérisé en ce que les longerons de guidage (55, 123) et les orifices traversants (61) de la partie cylindrique (9) de la douille d'entourage de gaz (1), sont formés par découpe de la paroi de la partie cylindrique (9) et par enfoncement des longerons de guidage (55, 123) dans la direction radiale, vers l'intérieur.
4. Dispositif selon la revendication 3, caractérisé en ce que chaque longeron de guidage (123) est en forme d'entretoise et possède deux surfaces de coupes (125) écartées l'une de l'autre.
5. Dispositif selon la revendication 4, caractérisé en ce que les surfaces de coupe (125) de chaque longeron de guidage (123) s'étendent sensiblement dans la direction de l'axe longitudinal (3).
6. Dispositif selon la revendication 4, caractérisé en ce que les surfaces de coupe (125) de chaque longeron de guidage (123) s'étendent sensiblement dans la direction périphérique de la partie cylindrique (9).
7. Dispositif selon la revendication 4, caractérisé en ce que les longerons de guidage (123) en forme d'entretoise partent transversalement aux deux surfaces de coupe (125), au niveau de leurs deux extrémités (124) par rapport à la paroi de la partie cylindrique (9).
8. Dispositif selon la revendication 3, caractérisé en ce que les longerons de guidage (55) de la douille d'entourage de gaz (1) sont en forme de patte et sont recourbés radialement vers l'intérieur pour que leurs arêtes frontales (57) s'appuient contre la périphérie de l'extrémité (5) de l'injecteur de carburant (7).
9. Dispositif selon la revendication 1, caractérisé en ce que les longerons de guidage (55) sont arrondis dans la direction opposée à la partie de fond (11).
10. Dispositif selon la revendication 1, caractérisé en ce que la douille d'entourage de gaz (1) est fixée à la périphérie de l'extrémité (5) de l'injecteur par plusieurs points de soudage (95).
11. Dispositif selon la revendication 1, caractérisé en ce que la douille d'entourage de gaz (1) est fixée à la périphérie de l'extrémité (5) de l'injecteur par une liaison par rabattement (99, 101).
12. Dispositif selon la revendication 1, caractérisé par une bague de fixation (109) à la périphérie de la douille d'entourage de gaz (1), cette bague ayant une section en forme de U ouverte radialement vers l'extérieur.
13. Dispositif selon la revendication 1, caractérisé en ce que dans la direction axiale, entre l'extrémité (5) de l'injecteur de carburant (7) et le fond (11) de la douille d'entourage de gaz (1), il y a un étroit intervalle annulaire (77) pour le gaz.
14. Dispositif selon la revendication 1, caractérisé en ce que l'injecteur de carburant (7) s'appuie par son extrémité (5) contre le fond (11) de la douille d'entourage de gaz (1) et en ce que dans le fond (11) il y a au moins un orifice d'alimentation en gaz (132) incliné par rapport à l'axe longitudinal (3) dans la direction de passage du carburant.
15. Procédé de fabrication d'un dispositif pour injecter un mélange carburant/gaz avec un injecteur de carburant (7) et une douille d'entourage de gaz (1) en forme de pot, dont la partie cylindrique (9) entoure au moins partiellement de manière axiale et le fond (11) entoure au moins de manière partiellement radiale, au moins un orifice d'éjection (43) de l'extrémité (5) de l'injecteur de carburant (7), et notamment un dispositif selon l'une des revendications 1 à 8, 13 ou 14, caractérisé en ce que les longerons de guidage (55, 123) sont formés sur la partie cylindrique (9) de la douille d'entourage de gaz (1) par enfoncement des différentes zones de la paroi de la partie cylindrique (9), complètement coupées, pour être poussées radialement vers l'intérieur.
EP92106218A 1991-05-31 1992-04-10 Dispositif d'injection d'un mélange combustible/gaz Expired - Lifetime EP0515810B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4117810 1991-05-31
DE4117810 1991-05-31
DE4121372 1991-06-28
DE4121372A DE4121372A1 (de) 1991-05-31 1991-06-28 Vorrichtung zur einspritzung eines brennstoff-gas-gemisches

Publications (2)

Publication Number Publication Date
EP0515810A1 EP0515810A1 (fr) 1992-12-02
EP0515810B1 true EP0515810B1 (fr) 1995-03-08

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EP92106218A Expired - Lifetime EP0515810B1 (fr) 1991-05-31 1992-04-10 Dispositif d'injection d'un mélange combustible/gaz

Country Status (5)

Country Link
US (1) US5193743A (fr)
EP (1) EP0515810B1 (fr)
JP (1) JP3137732B2 (fr)
DE (2) DE4121372A1 (fr)
ES (1) ES2069924T3 (fr)

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DE4129834A1 (de) * 1991-09-07 1993-03-11 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
DE4205887A1 (de) * 1992-02-26 1993-09-02 Bosch Gmbh Robert Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
DE4304804A1 (de) * 1993-02-17 1994-08-18 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
DE4312756A1 (de) * 1993-04-20 1994-10-27 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
IT1261325B (it) * 1993-10-29 1996-05-14 Weber Srl Iniettore monogetto assistito ad aria.
EP0654602B1 (fr) * 1993-11-18 2000-04-26 Siemens Automotive Corporation Adaptateur de montage pour injecteur de combustible assisté par air
DE4413217A1 (de) * 1994-04-15 1995-10-19 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
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JP3137732B2 (ja) 2001-02-26
US5193743A (en) 1993-03-16
ES2069924T3 (es) 1995-05-16
DE4121372A1 (de) 1992-12-03
JPH05187341A (ja) 1993-07-27
EP0515810A1 (fr) 1992-12-02
DE59201576D1 (de) 1995-04-13

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