EP0473736B1 - Dispositif pour l'injection d'un melange carburant-gaz - Google Patents

Dispositif pour l'injection d'un melange carburant-gaz Download PDF

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Publication number
EP0473736B1
EP0473736B1 EP91904484A EP91904484A EP0473736B1 EP 0473736 B1 EP0473736 B1 EP 0473736B1 EP 91904484 A EP91904484 A EP 91904484A EP 91904484 A EP91904484 A EP 91904484A EP 0473736 B1 EP0473736 B1 EP 0473736B1
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EP
European Patent Office
Prior art keywords
fuel
distribution
gas
valve
housing
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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
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EP91904484A
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German (de)
English (en)
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EP0473736A1 (fr
Inventor
Uwe Liskow
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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
    • F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
    • 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
    • F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/50—Arrangement of fuel distributors, e.g. with means for supplying equal portion of metered fuel to injectors

Definitions

  • the invention is based on a device for injecting a fuel-gas mixture according to the preamble of claim 1.
  • GB-A-2 188 982 discloses a device of the generic type, but in which the spray openings, the fuel transport channels and the distribution lines are located below different angles to each other and the fuel transport channels open into a cylindrical space with which the gas supply opening and the distribution lines are connected axially opposite. This has the disadvantage that the fuel is transported unevenly in the distribution lines and is deposited there and in the cylindrical space.
  • a device for injecting a fuel-gas mixture with a distributor housing which has a gas supply opening concentric to a longitudinal axis of the valve and has distribution openings arranged in alignment with spray openings of a fuel injection valve, the gas supply opening having the distribution openings communicates.
  • the fuel jet is not sprayed from the spray openings directly, but rather as a free jet into the distributor openings, so that fuel mist and parts of the core jet hit the inner walls of the Meet the distributor housing.
  • the fuel jet since the fuel jet is not enveloped by the gas jet and the gas velocity is low, the gas in the distributor chamber formed by the distributor housing and the fuel injection valve has no significant directional effect on the fuel.
  • the device according to the invention for injecting a fuel-gas mixture with the features of claim 1 has the advantage of particularly precise fuel allocation to the individual distributor openings or to the individual cylinders of an internal combustion engine and largely homogeneous mixture formation.
  • the directed fuel jet is injected from the spray openings of the spray end via the fuel transport channels into the distributor openings of the distributor housing and transported completely downstream by the gas supplied via the gas gap, so that the formation of a fuel film on the inner walls of the distributor housing is prevented.
  • the gas gap at its narrowest point has a smaller cross-sectional area than the gas feed opening.
  • the narrow formation of the gas gap allows the gas flow to be metered to the individual distributor openings on the one hand, on the other hand the gas is accelerated towards the distributor openings at a high speed, so that the mixture formation is improved and the fuel flows back into upstream direction is prevented.
  • valve cap is provided with a number of truncated cone-shaped elevations corresponding to the number of distributor openings, through which the fuel transport channels run and which extend into the truncated cone-shaped recesses of the distributor housing project such a distance that the at least partially circumferential gas gaps are formed between the circumference of the elevations and the surface of the depressions.
  • the gas supply opening is connected to the gas gaps by a gas distribution space which is formed concentrically with the longitudinal axis of the valve between the valve cap and the distributor housing, so that the gas is supplied in a particularly uniform manner to the gas gaps.
  • the smallest diameter of the elevation is smaller than the diameter of the distributor opening, so that the elevation advantageously projects into the distributor opening.
  • a truncated cone-shaped casing of the elevation is step-shaped and rests with a first step on the depression of the distributor housing and forms the gas gap with a second step together with a wall of the depression.
  • a gas channel running between the valve cap and the distributor housing is formed from the gas supply opening to each gas gap, so that an exact gas supply to the respective gas gap and a large contact surface of the valve cap on the distributor housing running perpendicular to the longitudinal axis of the valve is made possible .
  • the cone angle of the truncated cone-shaped elevation of the valve cap is smaller than the cone angle of the truncated cone-shaped recess of the distributor housing, so that the gas undergoes high, continuous acceleration until it enters a mixture formation zone formed by the region of the distributor opening facing the injection opening of the fuel injection valve experiences.
  • the assembly of the valve cap in the distributor housing is also facilitated.
  • the shape and position tolerances of the elevations and depressions can be designed more generously, with the exception of the immediate area of the distributor openings.
  • the fuel transport channel is formed in a fuel tube that leads through the valve cap. This enables a valve cap which can be produced in a simple manner, since there is no need for fine machining of the fuel transport ducts and instead pipe material which can be cut to length is used.
  • the fuel tube protrudes into the recess of the distributor housing and if the at least partially circumferential gas gap is formed between the surface of the recess and the circumference of the fuel tube.
  • the valve cap can be produced in a particularly simple manner and on its circumference with large manufacturing tolerances.
  • the outer diameter of the fuel tube is smaller than the diameter of the distributor opening, so that the fuel tube advantageously projects into the distributor opening.
  • valve cap For an exact and concentric contact of the fuel injection valve with the valve cap, it is advantageous if the truncated cone-shaped spray end of the valve housing rests on a truncated cone-shaped contact surface of the valve cap.
  • valve cap rests with a collar on a shoulder of the distributor housing.
  • the position of the valve housing to the valve cap is determined by a circumferentially positive connection between the valve cap and the valve housing.
  • the position of the valve cap to the distributor housing is determined by a connection between the valve cap and the distributor housing that is form-fitting in the circumferential direction, so that prevents the valve cap from rotating relative to the distributor housing and thus ensures that the fuel transport channels are aligned with the distributor openings of the distributor housing.
  • FIG. 1 shows a first exemplary embodiment with a partially illustrated fuel injector
  • FIG. 2 shows a view of the valve cap in the direction of arrow X of the first exemplary embodiment
  • FIG. 3 shows a second exemplary embodiment with a partially illustrated fuel injector
  • FIG. 4 shows a view of the distributor housing in the direction of arrow Y of the second embodiment
  • Figure 5 shows a third and Figure 6 a fourth embodiment.
  • the device for injecting a fuel-gas mixture into an intake manifold or directly into the cylinders of an internal combustion engine shown for example in longitudinal section and in detail in FIG. 1, has a fuel injector 1 which, with its truncated cone-shaped spray end 3 of a valve housing 4, is formed concentrically with a valve longitudinal axis 2 a truncated cone-shaped contact surface 6 of a valve cap 7 rests, so that there is a simple, but nevertheless very exact centering of the fuel injector 1 with respect to the valve cap 7.
  • the valve cap 7 is arranged at least in the axial direction between the injection end 3 of the fuel injection valve 1 and a distributor housing 10 which surrounds the injection end 3, the valve cap 7 and at least partially the fuel injection valve 1 with a stepped longitudinal bore 11.
  • the fuel injector 1 has a valve closing body 14 which interacts with a fixed valve seat 12 and can be actuated as a function of the operating state. Downstream of the valve seat 12, the spray end 3 of the fuel injection valve 1 has, for example, four, corresponding to the number of cylinders of the internal combustion engine or the number of injection groups in which several cylinders of the internal combustion engine are combined, corresponding number of spray openings 15. In alignment with the spray openings 15, one in the valve cap 7 the number of spray openings 15 corresponds to the number of fuel transport channels 17 which are open on both sides and which each open into a distributor opening 19 arranged in the distributor housing 10 and concentrically with the spray openings 15. Starting from the distributor openings 19, distributor lines 18 run in alignment with the fuel transport channels 17 in the distributor housing 10.
  • a gas supply opening 20 runs concentrically to the longitudinal valve axis 2 in the distributor housing 10, which is adjoined in the axial direction by a gas distributor chamber 22 formed between the valve cap 7 and the distributor housing 10 in a recess 21 of the distributor housing 10.
  • the gas distribution space 22 establishes a section of the connection between the central gas supply opening 20 and the individual distribution openings 19.
  • the cross-sectional area of the Fuel transport channel 17 at least as large as the cross-sectional area of the spray opening 15 and the cross-sectional area of the distributor opening 19 at least as large as the cross-sectional area of the fuel transport channel 17.
  • a compensating bore 23 is formed in the valve cap 7 which has a cross-sectional area which is substantially smaller than the gas supply opening 20.
  • the compensating bore 23 connects the gas distribution chamber 22 to a compensating chamber 27 formed between an end face 24 of the injection end 3 of the fuel injector 1 and the valve cap 7.
  • the valve cap 7 is provided with a number of truncated cone-shaped elevations 25 corresponding to the number of distributor openings 19 and oriented towards one distributor opening 19, through which the fuel transport channels 17 run concentrically.
  • the elevations 25 with their frustoconical shell 29 protrude into the frusto-conical depressions 26 of the distributor housing 10 at such a distance that a circumferential narrow gas gap 28 is formed between the circumference of the elevations 25 and the surface of the depressions 26, so that the fuel jet emerges after the outlet the fuel transport channel 17 is completely covered by a gas jet.
  • Each gas gap 28 extends from the gas distributor space 22 to one of the distributor openings 19 forming the base of a depression 26.
  • the elevations 25 with the fuel transport channels 17 can end immediately above, at the same level as this or within the distributor openings 19, as shown in the drawing.
  • FIG. 2 shows a view of the valve cap 7 of the first exemplary embodiment shown in FIG. 1 in the direction of the arrow X.
  • the cylindrical gas distributor space 22 stands with the narrow gas gaps 28 tapering in the shape of a truncated cone towards the distributor openings 19, each via a throttle point 31 formed at the transition in connection, which due to the large reduction in cross-section cause an exact metering of the gas supplied to the distributor openings 19 via the gas gaps 28 and an acceleration of the gas.
  • the cross-sectional area of the gas gap 28 that tapers in the shape of a truncated cone leads to a further acceleration of the gas, so that the gas comprises the fuel emerging from the fuel transport channel 17 at high speed.
  • the fuel sprayed from the spray openings 15 is transported completely downstream and cannot pass through the gas gaps 28 upstream into the gas distribution space 22 and into the gas supply opening 20 or to the distribution openings 19 of the other cylinders or the other injection groups of the internal combustion engine.
  • the fuel gas mixture is sprayed via the distributor lines 18 and injection lines (not shown) into the intake manifold or directly into the cylinders of the internal combustion engine.
  • the gas is, for example, air branched off by a bypass in front of a throttle valve in the intake manifold of the internal combustion engine.
  • a bypass in front of a throttle valve in the intake manifold of the internal combustion engine it is also possible to use recirculated exhaust gas from the internal combustion engine to reduce the emission of pollutants or a gas (air, exhaust gas) conveyed by an additional fan.
  • valve cap 7 has a collar 35 which, with its collar surface 36 running perpendicular to the longitudinal axis 2 of the valve, bears against a shoulder surface 37 of a shoulder 38 of the distributor housing 10. The circumference of the collar 35 bears against a parallel section 39 of the longitudinal bore 11 of the distributor housing 10 facing away from the gas supply opening 20.
  • the position of the fuel injector 1 relative to the valve cap 7 is determined by a positive connection in the circumferential direction between the valve housing 4 of the fuel injector 1 and the valve cap 7.
  • a positioning lug 42 is formed, for example, on a longitudinal bore 41 which extends concentrically to the longitudinal valve axis 2 in the valve cap 7 and which cooperates with a positioning recess 43 formed on the circumference of the valve housing 4. This prevents the fuel injection valve 1 from rotating relative to the valve cap 7 and, at the same time, thus prevents the spray openings 15 at the spray end from being aligned 3 guaranteed with the fuel transport channels 17 of the valve cap 7.
  • valve cap 7 In order to ensure that the fuel transport channels 17 of the valve cap 7 are aligned with the distributor openings 19 of the distributor housing 10, the valve cap 7 must be prevented from rotating relative to the distributor housing 10.
  • the circumferentially positive connection between the valve cap 7 and the distributor housing 10 which determines the position of the valve cap 7 relative to the distributor housing 10 is, for example, a positioning lug 45 formed on the parallel section 39 of the distributor housing 10 and a cooperation on the circumference of the collar 35 of the valve cap 7 Positioning recess 46 created.
  • annular chamber 50 is provided, the radially extending boundary surfaces of which are formed by an end face 51 of the collar 35 of the valve cap 7, which faces away from the fuel transport channels 17 and is perpendicular to the longitudinal axis 2 of the valve, and by a retaining ring 52 fastened to the circumference of the valve housing 4 and its axially extending boundary surfaces are formed by the circumference of the valve housing 4 and by the parallel section 39 of the distributor housing 10.
  • a sealing ring 53 is arranged in the annular chamber 50.
  • FIG. 3 shows a second exemplary embodiment of the invention with a partially illustrated fuel injection valve 1, in which the same and equivalent parts are identified by essentially the same reference numerals as in FIGS. 1 and 2.
  • the truncated cone-shaped casing 29 the elevation 25 is stepped.
  • the elevation 25 lies with a first step 61 on a wall 65 of the recess 26 of the distributor housing 10, so that a particularly exact and uniform formation of the gas gaps 28 is possible and thus, for example, a largely identical mixture is supplied to the individual cylinders of the internal combustion engine.
  • a recessed second stage 64 of the elevation 25 forms, together with the wall 65 of the recess 26, the gas gap 28.
  • FIG. 4 which shows a view of the distributor housing 10 of the second exemplary embodiment in the direction of the arrow Y, runs between the central one Gas supply opening 20 and the individual gas gaps 28 each have a gas channel 67 in the radial direction, which is formed between the valve cap 7 and the distributor housing 10, for example in the form of a groove 70 formed in a bottom surface 68 of the distributor housing 10 and delimited by the elevation 25 .
  • the gas channel 67 can be a rectangular as well as another, e.g. B. have semicircular cross-sectional shape. However, it is necessary that the cross-section of the gas channel 67 is significantly smaller than the cross-section of the gas supply opening 20, so that when the gas flows from the gas supply opening 20 in the gas channels 67, throttling takes place, which involves metering the individual distributor openings 19 via the gas gaps 28 supplied gas and an acceleration of the gas causes.
  • the gas gaps 28 tapering in the shape of a truncated cone in the direction of the distributor openings 19 further accelerate the gas, so that the gas comprises the fuel emerging from the fuel transport channels 17 at high speed.
  • FIG. 5 A third exemplary embodiment according to the invention is partially shown in FIG. 5, with the same parts having the same effect essentially the same reference numerals are identified as in FIGS. 1 to 4.
  • the circumferential gas gap 28 is formed between the circumference of the truncated cone-shaped elevation 25 and the surface of the truncated cone-shaped recess 26. Since the cone angle of the elevation 25 is smaller than the cone angle of the depression 26, the circumference of the elevation 25 and the surface of the depression 26 are designed to converge in the direction of the distributor opening 19. Accordingly, the gas gap 28 tapers very strongly starting from the central gas distributor space 22 to the distributor opening 19, so that there is a large, continuous reduction in the cross section of the gas gap 28.
  • the resulting throttling of the gas flow leads on the one hand to a metering of the gas supplied to the individual distributor openings 19, on the other hand the gas is continuously accelerated and comprises the fuel emerging from the fuel transport channel 17 at high speed.
  • the shape and position tolerances of the elevations 25 and the depressions 26 can be designed more generously, with the exception of in the immediate area of the distributor openings 19.
  • the assembly of the valve cap 7 in the distributor housing 10 is facilitated.
  • Fuel transport channels 17 are each formed by a fuel tube 75 which leads through the valve cap 7.
  • the fuel tubes 75 are made, for example, of pipe material that can be cut to length, so that they can be produced inexpensively.
  • valve cap 7 A simple and inexpensive manufacture of the valve cap 7 is also achieved in that the fuel tube 75 protrudes into the recess 26 of the distributor housing 10, and that the circumferential Gas gap 28 is formed between the frustoconical surface of the recess 26 and the circumference of the fuel tube 75, so that the requirements for the surface quality of the valve cap 7 are low, at least in the region of the elevations 25 at least partially surrounding the fuel tube 75.
  • the essential throttling of the gas takes place when the gas flows through the funnel-shaped gas gap 28, so that the metering and acceleration of the gas also take place there.
  • the fuel tubes 75 protrude into the distributor openings 19 of the distributor housing 10, provided that the outer diameter of the fuel tubes 75 is smaller than the diameter of the distributor openings 19, so that no fuel from the fuel transport channels 17 reaches the gas gaps 28 arranged further upstream can.
  • the fuel tube 75 and the valve cap 7 are formed in one piece.
  • the fuel is injected in a directed manner via the fuel transport channels 17 into the distributor openings 19.
  • the gas passes from a central gas supply opening 20 via a gas gap 28 to each of the Distribution openings 19 and there comprises the fuel at high speed, so that the fuel is transported completely downstream and forms a largely homogeneous fuel-gas mixture.

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

Abstract

Dans le cas des dispositifs déjà proposés pour l'injection d'un mélange de carburant-gaz, le jet de carburant est projeté depuis les orifices d'injection d'un injecteur de carburant sous forme de jet libre dans les orifices de distribution d'un boîtier de distribution de sorte qu'il y a un risque que des brouillards de carburant marginaux et des fractions du jet central ne donnent contre les parois intérieures du boîtier de distribution. La constitution d'un mélange carburant-gaz largement homogène n'est pas garantie. Le nouveau dispositif avec les jets de carburant projetés de manière dirigée depuis les orifices d'injection (15) via les conduites de carburant (17) jusque dans les orifices de distribution (19) présente l'avantage d'un dosage précis du carburant vers les différents orifices de distribution (19) et d'une formation de mélange largement homogène. Le gaz parvient, à partir d'un orifice d'amenée de gaz central (20) à travers une chambre de distribution de gaz (22) et à travers chaque fois une fente à gaz (28), à un orifice de distribution correspondant (19) où il entoure le jet de carburant respectif. Le présent dispositif convient en particulier à des moteurs à combustion interne faisant appel à un système d'allumage extérieur.

Claims (19)

  1. Dispositif pour injecter un mélange carburant-gaz avec un injecteur de carburant, comprenant un organe d'obturation d'injecteur (14) actionné suivant l'état de fonctionnement, et un nombre d'orifices d'éjection (15) dans l'extrémité d'éjection (3) du corps d'injecter (4), qui correspond au nombre des cylindres ou au nombre des groupes d'injection entre lesquels sont regroupés plusieurs cylindres, une alimentation en gaz (20) concentrique à l'axe (2) de l'injecteur, et des conduites de distribution (18) avec des orifices de distribution (19), l'orifice d'alimentation en gaz (20) communiquant avec les orifices de distribution (19) et, au moins dans la direction axiale, entre l'extrémité d'éjection (3) et le corps de distributeur (10) il y a un embout d'éjecteur (7) traversé par des canaux de passage de carburant (17) adjacents aux orifices d'élection (15) et dont le nombre correspond à celui des orifices d'éjection (15), caractérisé en ce que les axes perpendiculaires aux surfaces des orifices d'éjection (15), les canaux de passage de carburant (17) et les conduites de distribution (18) sont parallèles, et les canaux de passage de carburant (17) débouchent directement chaque fois dans un orifice de distribution (19) et sont entourés au moins partiellement sur leur périphérie par un intervalle à gaz (28) relié à un orifice d'alimentation en gaz (20).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'intervalle à gaz (28) présente à son endroit le plus étroit une surface de section plus petite que celle de l'orifice d'alimentation en gaz (20).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'embout d'injecteur (7) est muni d'un nombre de bossages (25) de forme tronconique dirigés chaque fois vers un orifice de distribution (19), qui correspond au nombre de ces orifices de distribution (19), ces bossages étant traversés par les canaux de passage de carburant (17) et pénétrant dans les cavités tronconiques (26) du corps de distributeur (10) avec un intervalle tel qu'entre la périphérie des bossages (25) et la surface des cavités (26), il se forme un intervalle à gaz (28) au moins partiellement périphérique.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'orifice d'alimentation en gaz (20) est relié aux intervalles à gaz (28) par une chambre de distribution de gaz (22), concentrique à l'axe longitudinal (2) de l'injecteur, entre l'embout d'injecteur (7) et le corps de distributeur (10).
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que le plus petit diamètre du bossage (25) est inférieur au diamètre de l'orifice de distribution (19).
  6. Dispositif selon la revendication 5, caractérisé en ce que le bossage (25) pénètre dans l'orifice de distribution (19).
  7. Dispositif selon l'une des revendications 3 à 6, caractérisé en ce que le bossage (25) est formé d'une enveloppe tronconique (29) étagée, en ce que son premier étage (65) s'appuie contre la cavité (26) du corps de distributeur (10) et en ce que son second étage (64) forme l'intervalle à gaz (28) avec la paroi (65) de la cavité (26).
  8. Dispositif selon la revendication 7, caractérisé par un canal à gaz (67) allant de l'orifice d'alimentation en gaz (20) vers chaque intervalle à gaz (28) entre l'embout d'injecteur (7) et le corps de distributeur (10).
  9. Dispositif selon l'une des revendications 3 à 8, caractérisé en ce que l'angle au sommet du bossage tronconique (25) est inférieur à l'angle au sommet de la cavité tronconique (26).
  10. Dispositif selon la revendication 1, caractérisé en ce que le canal de passage de carburant (17) est réalisé sous la forme d'un petit tube à carburant (75) qui traverse l'embout d'injecteur (7).
  11. Dispositif selon la revendication 10, caractérisé en ce que le petit tube à carburant (75) arrive au moins partiellement à travers l'extrémité d'éjection (3) du corps d'injecteur (4).
  12. Dispositif selon la revendication 10 ou 11, caractérisé en ce que le petit tube à carburant (75) pénètre dans la cavité (26) du corps de distributeur (10) et en ce que l'intervalle à gaz (28), au moins partiellement périphérique, est formé entre la surface de la cavité (26) et la périphérie du petit tube à carburant (75).
  13. Dispositif selon l'une des revendications 10 à 12, caractérisé en ce que le diamètre extérieur du petit tube à carburant (75) est inférieur au diamètre de l'orifice de distribution (19).
  14. Dispositif selon la revendication 13, caractérisé en ce que le petit tube à carburant (75) pénètre dans l'orifice de distribution (19).
  15. Dispositif selon l'une des revendications 10 à 14, caractérisé en ce que le petit tube à carburant (75) et l'embout d'injection (7) sont réalisés d'une seule pièce.
  16. Dispositif selon l'une des revendications 1 à 15, caractérisé en ce que l'extrémité d'éjection (3) de forme tronconique du corps (4) de l'injecteur s'appuie contre une surface d'appui (6) de forme tronconique de l'embout d'injecteur (7).
  17. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'embout d'injecteur (7) s'appuie par une collerette (35) contre un épaulement (38) du corps de distributeur (10).
  18. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la position de l'embout d'injecteur (7) par rapport au corps d'injecteur (4) est définie par une liaison de forme périphérique entre l'embout (7) et le corps d'injecteur (4).
  19. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la position de l'embout d'injecteur (7) par rapport au corps de distributeur (10) est définie par une liaison de forme dans la direction périphérique entre l'embout d'injecteur (7) et le corps de distributeur (10).
EP91904484A 1990-03-23 1991-02-23 Dispositif pour l'injection d'un melange carburant-gaz Expired - Lifetime EP0473736B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4009320A DE4009320A1 (de) 1990-03-23 1990-03-23 Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
DE4009320 1990-03-23
PCT/DE1991/000151 WO1991014865A1 (fr) 1990-03-23 1991-02-23 Dispositif pour l'injection d'un melange carburant-gaz

Publications (2)

Publication Number Publication Date
EP0473736A1 EP0473736A1 (fr) 1992-03-11
EP0473736B1 true EP0473736B1 (fr) 1995-07-05

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EP91904484A Expired - Lifetime EP0473736B1 (fr) 1990-03-23 1991-02-23 Dispositif pour l'injection d'un melange carburant-gaz

Country Status (5)

Country Link
US (1) US5203308A (fr)
EP (1) EP0473736B1 (fr)
JP (1) JPH04505795A (fr)
DE (2) DE4009320A1 (fr)
WO (1) WO1991014865A1 (fr)

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EP0640178B1 (fr) * 1992-05-15 1999-09-08 Orbital Engine Company (Australia) Pty. Ltd. Systeme d'alimentation en carburant/gaz pour moteurs a combustion interne
FR2722541B1 (fr) * 1994-07-12 1996-09-20 Magneti Marelli France Sa Injecteur de carburant "bi-jet" a aassistance pneumatique de pulverisation, pour moteur a combustioninterne alimente par injection
DE19529375A1 (de) * 1995-08-10 1997-02-13 Bosch Gmbh Robert Brennstoffeinspritzventil
US6427660B1 (en) * 2000-07-20 2002-08-06 Ford Global Technologies, Inc. Dual fuel compression ignition engine
US8360052B2 (en) * 2008-09-30 2013-01-29 Martin E Nix Half parabolic dish reflector with planar reflector solar smelter
CA3002057A1 (fr) * 2015-10-16 2017-04-20 Nostrum Energy Pte. Ltd. Procede de modification d'un injecteur direct classique et ensemble injecteur modifie

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JPH04505795A (ja) 1992-10-08
WO1991014865A1 (fr) 1991-10-03
DE4009320A1 (de) 1991-09-26
DE59105916D1 (de) 1995-08-10
US5203308A (en) 1993-04-20
EP0473736A1 (fr) 1992-03-11

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