FR2909731A1 - Internal combustion engine's part manufacturing method for vehicle, involves incorporating part of common fuel supply ramp into injection tubes by injecting synthetic material compatible with that of conduit of air intake splitter - Google Patents
Internal combustion engine's part manufacturing method for vehicle, involves incorporating part of common fuel supply ramp into injection tubes by injecting synthetic material compatible with that of conduit of air intake splitter Download PDFInfo
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- FR2909731A1 FR2909731A1 FR0610744A FR0610744A FR2909731A1 FR 2909731 A1 FR2909731 A1 FR 2909731A1 FR 0610744 A FR0610744 A FR 0610744A FR 0610744 A FR0610744 A FR 0610744A FR 2909731 A1 FR2909731 A1 FR 2909731A1
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- fuel
- injectors
- synthetic material
- fuel supply
- internal combustion
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Classifications
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10314—Materials for intake systems
- F02M35/10321—Plastics; Composites; Rubbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0684—High pressure fuel injection systems; Details on pumps, rails or the arrangement of valves in the fuel supply and return systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10098—Straight ducts
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10347—Moulding, casting or the like
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
- F02M35/112—Intake manifolds for engines with cylinders all in one line
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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
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
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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
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/16—Indirect injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/084—Blends of gasoline and alcohols, e.g. E85
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
L'invention concerne le domaine des moteurs à combustion interne, plusThe invention relates to the field of internal combustion engines, more
particulièrement en liaison avec leurs systèmes d'admission d'air et d'apport de carburant. particularly in connection with their air intake and fuel supply systems.
Les motorisations de type Flex Fuel (c'est-à-dire polycarburant) sont en particulier concernées. Il s'agit de moteurs pouvant utiliser plusieurs types de carburant. Au Brésil, de nombreuses automobiles du marché 10 sont équipées de système polycarburant pouvant fonctionner soit à l'essence, soit à l'éthanol. Certains véhicules en Amérique du Nord sont aussi disponibles avec un système polycarburant utilisant l'essence ou le carburant E85 (un mélange qui contient 15 85% d'éthanol, 15% d'essence). En Europe tous les véhicules vendus doivent pouvoir accepter un carburant (essence ou diesel) comportant une part minoritaire (5 à 10% environ) de biocarburant (carburant d'origine végétale). Certains 20 constructeurs ont développé des moteurs, non vendus sous le label polycarburant, mais qui acceptent des taux bien supérieurs, jusqu'à 30%. Un problème technique ici pris en considération et qui apparaît en particulier sur les moteurs 25 polycarburants concerne le démarrage à froid. Une solution déjà proposée consiste dans l'ajout d'injecteurs d'essence dédiés au démarrage à froid sur le répartiteur d'admission d'air. Pour plus d'efficacité, en particulier vis-à-vis du traitement des problèmes de 30 dispersion de richesse poste à poste, l'injection additionnelle est typiquement multipoint, c'est-à-dire avec un injecteur supplémentaire par conduit d'admission. Flex fuel engines (that is to say, polyfuel) are particularly concerned. These are engines that can use more than one type of fuel. In Brazil, many cars in market 10 are equipped with a flex-fuel system that can run on either gasoline or ethanol. Some vehicles in North America are also available with a flex-fuel system using gasoline or E85 fuel (a blend that contains 85% ethanol, 15% gasoline). In Europe all vehicles sold must be able to accept a fuel (petrol or diesel) with a minority share (around 5 to 10%) of biofuel (vegetable fuel). Some 20 manufacturers have developed engines, not sold under the flex-fuel label, but which accept much higher rates, up to 30%. A technical problem which is considered here and which appears in particular with regard to the flex-fuel engines concerns cold starting. A solution already proposed is the addition of gas injectors dedicated to cold start on the air intake manifold. For greater efficiency, particularly with respect to the treatment of point-to-point wealth dispersion problems, the additional injection is typically multipoint, ie with one additional injector per admission conduit. .
2909731 2 Cette solution de l'art antérieur est coûteuse et complexe du fait, comme illustré figure 1 pour un moteur quatre cylindres connu, de la présence des moyens de connectique 3 et des conduits d'amenée de carburant 5a, 5 5b, 5c, 5d qu'elle nécessite pour l'alimentation de chaque injecteur 7a, 7b, 7c, 7d. Une telle solution utilise typiquement des injecteurs en laiton insérés à froid dans des (alésages de) tubulures dédiées, formées sur chacun des conduits primaires du répartiteur d'admission d'air en plastique 9a, 9b, 9c, 9d. Ainsi, on connaît déjà dans l'art antérieur un procédé de fabrication d'une partie de moteur à combustion interne, dans lequel : a) on réalise en matière synthétique une partie au moins de plusieurs conduits répartiteur d'admission de comburant, b) et on rapporte sur chacun d'eux au moins un injecteur de carburant, à l'endroit d'une tubulure communicant localement avec ladite partie du conduit répartiteur correspondant. Est par conséquent également connue une partie de moteur à combustion interne comprenant plusieurs conduits d'admission répartiteur de comburant, en matériau plastique, avec chacun desquels communiquent plusieurs injecteurs de carburant, ceci à l'endroit de plusieurs tubulures situées sur le chemin du mélange comburant-carburant en direction des chambres de combustion, lesdits injecteurs de carburant communiquant par ailleurs avec au moins un conduit d'alimentation en carburant. Un objet de la présente invention vise à atteindre tout ou partie des objectifs suivants : réduire la 3 2909731 complexité des solutions du type illustré figure 1, diminuer les coûts, faciliter les conditions de fabrication et/ou de montage de la partie de moteur concernée, réduire l'encombrement à l'endroit concerné du 5 moteur. Une solution proposée est, préalablement à l'étape b) précitée, d'incorporer aux tubulures une partie au moins d'une rampe commune en matériau synthétique d'alimentation en carburant des injecteurs.This solution of the prior art is expensive and complex because, as illustrated in FIG. 1 for a known four-cylinder engine, the presence of the connector means 3 and the fuel supply conduits 5a, 5b, 5c, 5d it requires for the supply of each injector 7a, 7b, 7c, 7d. Such a solution typically uses cold-inserted brass injectors in dedicated (bored) tubing formed on each of the primary conduits of the plastic air manifold 9a, 9b, 9c, 9d. Thus, a method of manufacturing an internal combustion engine part is already known in the prior art, in which: a) at least a portion of several oxidant inlet distributor pipes are made from synthetic material, b) and there is reported on each of them at least one fuel injector, at the location of a pipe communicating locally with said portion of the corresponding distribution duct. Also known is an internal combustion engine part comprising a plurality of oxidizer distributor ducts, of plastic material, each of which communicate with several fuel injectors, this at the location of several pipes located in the path of the oxidant mixture. -Building towards the combustion chambers, said fuel injectors also communicating with at least one fuel supply conduit. An object of the present invention aims to achieve all or part of the following objectives: to reduce the complexity of the solutions of the type illustrated in FIG. 1, to reduce the costs, to facilitate the conditions of manufacture and / or assembly of the motor part concerned, reduce the clutter at the relevant location of the engine. A proposed solution is, prior to step b) above, to incorporate the tubing at least a portion of a common rail synthetic material fuel supply injectors.
10 Une pièce issue de la mise en oeuvre de tout ou partie des caractéristiques du procédé de l'invention est également concernée en ce qu'elle intégrera favorablement tout ou partie : - desdits conduits répartiteur d'admission de 15 comburant, - et de ladite rampe commune d'alimentation en carburant des injecteurs. Sont en outre concernés un moteur à combustion interne et son utilisation, en particulier en liaison 20 avec la prévision : -d'injecteurs principaux de carburant situés en aval de la zone où sont situés les injecteurs qui communiquent avec ladite rampe commune d'alimentation en carburant, 25 - d'une injection de polycarburant dans les injecteurs principaux et d'une d'injection de monocarburant (dépourvu d'éthanol ou de carburant d'origine végétale) dans les injecteurs qui communiquent avec ladite rampe commune.A part resulting from the implementation of all or part of the characteristics of the process of the invention is also concerned in that it will integrate favorably all or part of: - said oxidizer inlet distributor pipes, - and said common fuel rail of the injectors. Also concerned are an internal combustion engine and its use, in particular in connection with the prediction of: main fuel injectors located downstream of the zone where the injectors are located which communicate with said common supply rail; fuel, 25 - a polyfuel injection in the main injectors and a monofuel injection (devoid of ethanol or vegetable fuel) in the injectors that communicate with said common rail.
30 On a ainsi pu en particulier réaliser une rampe d'injecteurs de carburant (tel de l'essence) pour un 2909731 4 départ à froid (version flux fuel) intégré au répartiteur d'admission d'air. Des exemples de réalisation de l'invention suivent, sans portée limitative, en référence des 5 dessins illustrant ces exemples et dans lesquels la figure 2 montre une partie de moteur, la figure 3 montre plus distinctement la zone d'injection de carburant de la rampe commune, et les figures 4 et 5 correspondent aux coupes IV-IV et V- V de la figure 3, vu depuis la gauche 10 et depuis l'arrière de cette figure, respectivement. Figure 2, on voit une partie de moteur 10 montrant un répartiteur de comburant pourvu de quatre conduits primaires d'air comburant lla, llb, 11c, lld recevant quatre injecteurs de carburant 13a, 13b, 13c, 13d à 15 l'endroit de quatre tubulures d'injection 15a, 15b, 15c, 15d intégrées chacune à l'un des conduits du répartiteur d'air lla...11d. La ligne noire 17 marque et schématise l'emplacement de la rampe commune d'amenée de carburant que l'invention prévoit pour améliorer les conditions 20 d'alimentation en carburant des injecteurs précités et de réalisation de cette partie du moteur. Figure 3, on retrouve les injecteurs de carburant 13a...13d insérés dans le passage intérieur des tubulures adaptées pour les recevoir étroitement et qui, comme 25 montré figure 4 pour l'un des ensembles, sont ouvertes sur le canal intérieur, tel que 19a, des conduits lla...11d de répartition de l'air d'admission. Ainsi, chaque injecteur de carburant, tel que 13a figure 4, communique avec le canal intérieur correspondant, tel que 19a, 30 figure 4. Cet injecteur 13a comprend deux passages calibrés, ici 21a, 21b, qui s'intersectent à l'intérieur de la masse de l'injecteur.In particular, it was possible to produce a fuel injector ramp (such as petrol) for a cold start (fuel flow version) integrated with the air intake manifold. Embodiments of the invention follow, without limiting reference, with reference to the drawings illustrating these examples and in which FIG. 2 shows a motor part, FIG. 3 more clearly shows the fuel injection zone of the ramp. common, and Figures 4 and 5 correspond to the sections IV-IV and V-V of Figure 3, seen from the left and from the rear of this figure, respectively. 2, there is shown a motor portion 10 showing an oxidizer distributor provided with four primary combustion air ducts 11a, 11b, 11c, 11d receiving four fuel injectors 13a, 13b, 13c, 13d at the location of four. injection manifolds 15a, 15b, 15c, 15d each integrated with one of the ducts of the air distributor 11a ... 11d. The black line 17 marks and schematizes the location of the common fuel feed ramp that the invention provides to improve the conditions of fuel supply of the aforementioned injectors and of making this part of the engine. 3, there are the fuel injectors 13a ... 13d inserted into the internal passage of the tubes adapted to receive them closely and which, as shown in FIG. 4 for one of the sets, are open on the inner channel, such as 19a, ducts 11a ... 11d distribution of the intake air. Thus, each fuel injector, such as 13a FIG. 4, communicates with the corresponding inner channel, such as 19a, FIG. 4. This injector 13a comprises two calibrated passages, here 21a, 21b, which intersect within each other. the mass of the injector.
2909731 5 Le passage aval 21b est ici perpendiculaire à l'axe 190 du canal d'admission d'air 19a et débouche ainsi dans ce canal. Le passage amont 21a est ici perpendiculaire au 5 passage aval 21b avec lequel il communique à leur intersection. Le passage amont 21a débouche dans le canal intérieur 23 de la rampe 25 commune d'alimentation en carburant des injecteurs 13a...13d (figure 5 notamment). La communication entre le passage 21a et le canal 10 23 est sensiblement perpendiculaire à la direction générale d'allongement 25a de la rampe à carburant 25 ; voir figure 5. Cette rampe à carburant 25 est une rampe commune aux différents injecteurs 13a...13d. Elle est en matériau 15 synthétique, typiquement plastique, et est incorporée ici partiellement avec les tubulures 15a...15d. Précisément, on voit notamment figure 4 que la surface interne de la rampe intercepte, en périphérie du canal 23, les alésages des tubulures 15a...15d des 20 injecteurs, permettant une communication. Les injecteurs (ici donc des cylindres en laiton) réalisent l'étanchéité avec le milieu extérieur pour le circuit carburant du fait d'une insertion à froid (frettage) dans les tubulures respectives 15a...15d 25 intégrées aux répartiteurs d'air correspondants lla...11d. Chaque injecteur peut en particulier être issu de formage ou d'usinage, avec ses deux perçages ou canaux d'injection 21a, 21b, communiquant et orientés à 90 l'un de l'autre avec donc l'un suivant l'axe de révolution du 30 cylindre débouchant dans sa partie inférieure, l'autre perpendiculaire, à mi-hauteur, interceptant le premier et débouchant sur la surface extérieure.The downstream passage 21b here is perpendicular to the axis 190 of the air intake channel 19a and thus opens into this channel. The upstream passage 21a is here perpendicular to the downstream passage 21b with which it communicates at their intersection. The upstream passage 21a opens into the inner channel 23 of the common fuel supply ramp of the injectors 13a ... 13d (Figure 5 in particular). The communication between the passage 21a and the channel 23 is substantially perpendicular to the general elongation direction 25a of the fuel rail 25; see Figure 5. This fuel rail 25 is a ramp common to the various injectors 13a ... 13d. It is made of synthetic material, typically plastic, and is incorporated here partially with the tubings 15a ... 15d. Specifically, it is seen in Figure 4 that the inner surface of the ramp intercepts, at the periphery of the channel 23, the bores of the tubes 15a ... 15d of the injectors, allowing communication. The injectors (here in this case brass cylinders) seal with the external environment for the fuel circuit because of a cold insertion (shrinking) in the respective pipes 15a ... 15d 25 integrated into the corresponding air distributors lla ... 11d. Each injector may in particular be derived from forming or machining, with its two holes or injection channels 21a, 21b, communicating and oriented at 90 with one another, and therefore one along the axis of revolution. the cylinder opening in its lower part, the other perpendicular, at mid-height, intercepting the first and opening on the outer surface.
2909731 6 Une solution, par frettage mécanique, issue du procédé d'insertion à froid devrait garantir la tenue mécanique entre les éléments et l'étanchéité vis-à-vis du milieu extérieur.A solution, by mechanical hooping, resulting from the cold insertion process should ensure the mechanical strength between the elements and the sealing vis-à-vis the external environment.
5 Une indexation en rotation à l'insertion pourra en outre permettre la communication entre le volume interne de la rampe à carburant 25 et le volume interne de chaque conduit primaire d'admission d'air lla....11d. Pour obtenir cela, on conseille de conduire les 10 deux étapes suivantes : a) on réalise en matière synthétique une partie au moins desdits conduits répartiteur d'admission de comburant lla....11d, b) on rapporte sur chacun d'eux au moins un 15 injecteur de carburant 13a...13d, à l'endroit de la tubulure 15a...15d concernée qui communique donc localement avec la partie correspondante du conduit répartiteur. En outre, préalablement à l'étape b), on va venir incorporer auxdites tubulures 15a....15d une partie au 20 moins de la rampe commune 25 en matériau synthétique, ceci de préférence simultanément avec, ou lors de, l'étape a). Pour tendre d'autant plus vers les buts visés en début de description, l'incorporation de cette rampe 25 locale va être favorablement réalisée lors de l'étape a) précitée. Cette incorporation s'effectuera a priori par moulage de matériau plastique. En particulier, l'incorporation s'effectuera favorablement par injection de matière plastique 30 compatible avec la matière synthétique des conduits du répartiteur d'air 11a...11d, pour qu'il puisse y avoir moulage, et donc imbrication intime.Rotational indexing at the insertion may further allow communication between the internal volume of the fuel rail 25 and the internal volume of each primary air intake duct 11a .... 11d. To obtain this, it is advisable to carry out the following two steps: a) at least a part of said oxidant inlet distributor ducts 11a, 11d, b) is made of synthetic material. minus a fuel injector 13a ... 13d, at the place of the tubing 15a ... 15d concerned which therefore communicates locally with the corresponding part of the distribution duct. In addition, prior to step b), at least part of the common ramp 25 made of synthetic material will be incorporated in said tubings 15a .... 15d, this preferably simultaneously with, or during, the step at). In order to strive even more towards the goals aimed at at the beginning of the description, the incorporation of this local ramp 25 will be favorably achieved during the aforementioned step a). This incorporation will be carried out a priori by molding plastic material. In particular, the incorporation will be favorably by injection of plastics material 30 compatible with the synthetic material of the ducts of the air distributor 11a ... 11d, so that there can be molding, and thus intimate nesting.
2909731 7 Ainsi, on pourra obtenir une pièce unique issue d'un procédé d'injection plastique intégrant tout ou partie d'un répartiteur d'admission de comburant _la...11d et d'une rampe commune 25 d'injection de carburant.Thus, it will be possible to obtain a single piece resulting from a plastic injection process incorporating all or part of an oxidizer inlet distributor 11d and a common fuel injection rail.
5 Et, avantageusement préalablement à l'étape b) précitée, on réalisera dans les injecteurs lesdits conduits d'injection 21a, 21b déjà présentés. On peut en particulier prévoir pour cela, comme on le conseille, d'opérer dans l'ordre suivant 10 a) - réalisation du répartiteur 11a.... lld d'admission d'air comburant (ou d'une coque de ce répartiteur) et de la rampe commune d'injection 25 en une seule opération, via un procédé d'injection plastique en particulier, 15 b) - usinage des injecteurs 1.3a.... 13d, y compris leurs conduits internes 21e, 21b, c)-insertion à froid, par frettage, de chaque injecteur dans l'alésage dédié sur la tubulure considérée 15e....15d de chaque conduit répartiteur, en prenant soin 20 de respecter l'indexation des injecteurs, d)- soudure au miroir ou par rotation d'un embout venant fermer les extrémités de la rampe commune 25, l'un des embouts recevant typiquement la connectique de liaison avec le circuit de carburant amont.And, advantageously prior to the above-mentioned step b), the injection ducts 21a, 21b already presented will be made in the injectors. In particular, it can be provided for this, as recommended, to operate in the following order 10 a) - realization of the distributor 11a .... lld combustion air intake (or a hull of this distributor ) and the common injection rail 25 in a single operation, via a plastic injection process in particular, b) - machining injectors 1.3a .... 13d, including their internal conduits 21e, 21b, c ) - cold insertion, by shrinking, of each injector in the bore dedicated to the tubing considered 15e .... 15d of each distribution duct, taking care 20 to respect the indexing of the injectors, d) - mirror welding or by rotating a nozzle that closes the ends of the common rail 25, one of the ferrules typically receiving the connection connection with the upstream fuel circuit.
25 A noter que, lors de l'étape a), on peut prévoir de réaliser le répartiteur d'admission d'air comburant en deux, ou plus de deux, coquilles. A cet égard, une partie de la forme de chaque répartiteur pourra être réalisée monobloc avec la bride de fixation culasse, la partie 30 restante (coquille partielle) pouvant être moulée avec la rampe 25 puis rapportée et fixée (typiquement soudée) à la première partie de coquille plastique.It should be noted that during step a), it is possible to provide the combustion air intake distributor in two or more shells. In this regard, part of the shape of each distributor can be made in one piece with the yoke mounting flange, the remaining part (partial shell) can be molded with the ramp 25 and reported and fixed (typically welded) to the first part of plastic shell.
2909731 8 On pourra trouver également approprié de réaliser la rampe commune 25 par coquilles. A titre préférentiel, le moteur auquel s'applique l'invention comprendra des injecteurs principaux de 5 carburant situés en aval de la zone où sont situés lesdits injecteurs 13a, 13b, 13c, 13d qui communiquent avec la rampe commune 25 précitée d'alimentation en carburant. Dans ce moteur, on injectera préférentiellement un 10 polycarburant dans les injecteurs principaux et on injectera un monocarburant, dépourvu d'éthanol ou de carburant d'origine végétale, dans les injecteurs 13a, 13b, 13c, 13d qui communiquent avec ladite rampe commune 25.It may also be found suitable to make the common rail 25 by shells. Preferably, the engine to which the invention applies will comprise main fuel injectors located downstream from the zone where said injectors 13a, 13b, 13c, 13d are located which communicate with the aforementioned common ramp 25 for supplying fuel. fuel. In this engine, a polyfuel will preferably be injected into the main injectors and a monofuel, without ethanol or fuel of plant origin, will be injected into the injectors 13a, 13b, 13c, 13d which communicate with said common rail 25.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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FR0610744A FR2909731A1 (en) | 2006-12-08 | 2006-12-08 | Internal combustion engine's part manufacturing method for vehicle, involves incorporating part of common fuel supply ramp into injection tubes by injecting synthetic material compatible with that of conduit of air intake splitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR0610744A FR2909731A1 (en) | 2006-12-08 | 2006-12-08 | Internal combustion engine's part manufacturing method for vehicle, involves incorporating part of common fuel supply ramp into injection tubes by injecting synthetic material compatible with that of conduit of air intake splitter |
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FR2909731A1 true FR2909731A1 (en) | 2008-06-13 |
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FR0610744A Pending FR2909731A1 (en) | 2006-12-08 | 2006-12-08 | Internal combustion engine's part manufacturing method for vehicle, involves incorporating part of common fuel supply ramp into injection tubes by injecting synthetic material compatible with that of conduit of air intake splitter |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3044048A1 (en) * | 2015-11-20 | 2017-05-26 | Renault Sas | IMPROVED AIR DISTRIBUTION OF A VEHICLE |
CN111102116A (en) * | 2018-10-29 | 2020-05-05 | 陈茂微 | Rotatable synchronous oil injection structure of double-cavity electronic injection oil nozzle |
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US5022371A (en) * | 1989-09-29 | 1991-06-11 | Siemens-Bendix Automotive Electronics L.P. | Molded plastic fuel rail for an internal combustion engine |
EP0501612A2 (en) * | 1991-02-23 | 1992-09-02 | Jaguar Cars Limited | Inlet manifold and fuel supply assembly |
US5611313A (en) * | 1995-03-15 | 1997-03-18 | Handy & Harman Automotive Group, Ind. | Process for molding a fuel rail assembly |
DE19600378A1 (en) * | 1996-01-08 | 1997-07-10 | Bosch Gmbh Robert | Fuel injection system |
DE20105866U1 (en) * | 2001-04-04 | 2001-08-02 | Schreiner David | Binary feed system for fuel injection engine |
EP1150000A2 (en) * | 2000-04-27 | 2001-10-31 | Pierburg Aktiengesellschaft | Arrangement for forming a mixture for a combustion engine |
EP1375899A2 (en) * | 2002-06-18 | 2004-01-02 | Siemens VDO Automotive Inc. | Vehicle intake manifold having an integrated fuel rail and volume adjacent thereto |
EP1715168A1 (en) * | 2004-12-03 | 2006-10-25 | Ford Global Technologies, LLC | Integrated injection system |
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US5022371A (en) * | 1989-09-29 | 1991-06-11 | Siemens-Bendix Automotive Electronics L.P. | Molded plastic fuel rail for an internal combustion engine |
EP0501612A2 (en) * | 1991-02-23 | 1992-09-02 | Jaguar Cars Limited | Inlet manifold and fuel supply assembly |
US5611313A (en) * | 1995-03-15 | 1997-03-18 | Handy & Harman Automotive Group, Ind. | Process for molding a fuel rail assembly |
DE19600378A1 (en) * | 1996-01-08 | 1997-07-10 | Bosch Gmbh Robert | Fuel injection system |
EP1150000A2 (en) * | 2000-04-27 | 2001-10-31 | Pierburg Aktiengesellschaft | Arrangement for forming a mixture for a combustion engine |
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EP1375899A2 (en) * | 2002-06-18 | 2004-01-02 | Siemens VDO Automotive Inc. | Vehicle intake manifold having an integrated fuel rail and volume adjacent thereto |
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Publication number | Priority date | Publication date | Assignee | Title |
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FR3044048A1 (en) * | 2015-11-20 | 2017-05-26 | Renault Sas | IMPROVED AIR DISTRIBUTION OF A VEHICLE |
CN111102116A (en) * | 2018-10-29 | 2020-05-05 | 陈茂微 | Rotatable synchronous oil injection structure of double-cavity electronic injection oil nozzle |
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