EP0666417B1 - Arrangement of a fuel injection engine having aerated injectors - Google Patents

Arrangement of a fuel injection engine having aerated injectors Download PDF

Info

Publication number
EP0666417B1
EP0666417B1 EP19940403012 EP94403012A EP0666417B1 EP 0666417 B1 EP0666417 B1 EP 0666417B1 EP 19940403012 EP19940403012 EP 19940403012 EP 94403012 A EP94403012 A EP 94403012A EP 0666417 B1 EP0666417 B1 EP 0666417B1
Authority
EP
European Patent Office
Prior art keywords
air
injectors
casing
arrangement according
distribution duct
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
EP19940403012
Other languages
German (de)
French (fr)
Other versions
EP0666417A1 (en
Inventor
Martial Dore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0666417A1 publication Critical patent/EP0666417A1/en
Application granted granted Critical
Publication of EP0666417B1 publication Critical patent/EP0666417B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • 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

Definitions

  • the present invention relates to an arrangement of petrol injection engine with injectors ventilated usually called mantle injectors of air.
  • an engine arrangement with gasoline injection of the type comprising a set fuel injectors associated with combustion of engine cylinders, a rigid case connected to the fuel supply parts of injectors, delimiting a fuel distribution channel in the set of injectors, and a circuit ventilation of the injector noses comprising a air distribution to all the noses, provided orifices opening in the vicinity of these noses, and means for connecting this air distribution channel to the rest of the ventilation circuit.
  • the air ventilated at the level of the nose of the injectors improves the spraying of gasoline by increase in relative speed between air and gasoline.
  • the gasoline engine is supplied with air by means of a circuit comprising a air filter connected by an intermediate connection member to an air butterfly housing itself connected to a engine gas intake manifold.
  • the canal air distribution of the ventilation circuit of the noses of injectors is connected to the air filter by a pipe flexible connected to the intermediate connection member.
  • the object of the invention is to remedy these problems and minimize the length of the flexible pipe in order to reduce the pressure losses of the circulating air in this conduct.
  • the subject of the invention is an arrangement of a petrol injection engine, of the aforementioned type, characterized in that the supply parts and the noses of the injectors respectively form opposite ends of the injectors, the distribution channel air being separated from the housing, and in that the means for connecting the air distribution channel to the rest of the ventilation circuit comprise an air supply duct integrated into the housing.
  • FIG. 1 a front part 10 of a motor vehicle, provided with an access cover 12, in which a motor 14 is arranged transversely gasoline injection.
  • This front part 10 includes a engine arrangement according to the invention, designated by the general reference 16.
  • the motor 14 comprises a cylinder block not shown in the figures, in which are arranged four aligned cylinders, and one cylinder head 26, shown in FIG. 3, attached to the cylinder block along a joint plane 28.
  • Each cylinder has a combustion chamber 30 closed at its upper part by the cylinder head 26.
  • This chamber 30 is connected in a manner known per se, of a leaves to an intake duct 32 itself connected to a manifold 34 of manifold 24, and secondly to a exhaust duct 36, the intake ducts and being formed in the cylinder head 26.
  • each intake duct 32 opening into the combustion chamber 30 has an orifice closed by a valve 38 shown in phantom in Figure 3.
  • the motor 14 comprises a row of four injectors 42. These are carried for example by the intake manifold 24 by tight fitting of their nose 44 into sockets 46 material coming with the collector.
  • the noses 44 of injectors are arranged in the intake pipes 34 according to a provision known per se which will not described in more detail.
  • the fuel supply ends 48 of the injectors are connected to a supply circuit in petrol by a rigid case 50, made of plastic, which will be described in more detail later.
  • the arrangement 16 also includes a circuit for ventilation of the noses 44 of the injectors comprising a channel air distribution 52, of known type, provided by example in manifold 24 as shown in more detail in Figure 6, provided with holes 54 opening out in the vicinity of the noses 44 of the injectors.
  • a circuit for ventilation of the noses 44 of the injectors comprising a channel air distribution 52, of known type, provided by example in manifold 24 as shown in more detail in Figure 6, provided with holes 54 opening out in the vicinity of the noses 44 of the injectors.
  • This channel 52 is supplied with air from the filter 18 via the connection member intermediate 20, a flexible pipe 56 and the housing 50 connected in series (see Figure 1).
  • the box 50 has a generally rectilinear shape parallel to the alignment direction of the injectors 42 and comprises a longitudinal partition 57 delimiting two compartments one forming a fuel distribution channel 58 in the injectors and the other a conduit 60 for supplying air from air distribution channel 52.
  • the fuel distribution channel 58 has a shape general in chicane, known per se, so that ports 59A, 59B for fuel inlet and delivery gas not consumed by the injectors are disposed at the same end of the housing 50.
  • ports 59A, 59B for fuel inlet and delivery gas not consumed by the injectors are disposed at the same end of the housing 50.
  • the distribution channel petrol 58 includes orifices 64 for supplying injectors 42 extended by nozzles 66 coming from material with the housing 50 in which are fitted sealingly the supply ends of the injectors.
  • the air supply duct 60 extends along the length of the housing 50 and has a first end connected to the flexible pipe 56, disposed at the end of the housing opposite the means 62, and a second end connected to the distribution channel air, arranged substantially in the middle of the housing 50.
  • Air supply duct 60 is connected to the flexible pipe 56 by a bent end piece 68 coming from material with the housing 50 (see Figure 2) and the channel air distribution 52 by a bent duct forming a fitting rigid 70 whose ends are fitted so sealed respectively in an orifice 72 machined in the manifold 24, communicating with the distribution channel 52, and in a nozzle 74 connected to the supply duct in air 60, integral with the housing 50 (see figure 4).
  • connection orifice 72 opens out substantially in the middle of the length of the distribution channel air 52 to allow good air distribution in this channel and in the ventilation holes 54.
  • Figures 4 to 6 show the directions of gasoline and air circulation by arrows without reference.
  • the housing 50 is mounted on the injectors 42, after assembly of the latter in the sockets 46, by fitting the ends 66 on the ends supply 48 of the injectors.
  • the orifice 72 connection of the air distribution channel 52 is provided known means 76 for positioning the connector 70 (see Figure 4), imposing a predetermined orientation of this fitting such that the end piece 74 fits automatically on the fitting 70 when mounting the housing 50 on the injectors 42.
  • FIG. 7 a variant of realization of the connection connecting the supply duct in air 60 to the air distribution channel 52, the fitting being designated in this case by the reference 70A.
  • the 70A fitting came integrally with the housing 50 and its free end is fitted with tightly sealed in an orifice 72A, machined in the manifold 24, communicating with the air distribution channel 52.
  • This variant embodiment of the connector allows to simplify the means of connection between the conduit air supply 60 and the air distribution channel 52 by removing the sealing means between the housing and the connector as well as the positioning means of this fitting. This variant also allows a gain of time during assembly of the housing 50.
  • the housing 50 comprises conventional means of attachment to an upper part of the engine 14, by example a cylinder head cover, comprising transverse lugs 78 materials coming from the case, fitted with fixing screw passage holes 80 (not shown).
  • the invention has many advantages.
  • the engine arrangement according to the invention allows to create a ventilation circuit for the injector noses compact and aesthetic thanks to the integration of the air supply line in the rigid housing.
  • the flexible pipe connecting the intermediate connection member, disposed between the air filter and the housing air butterfly, at one end of the rigid casing covering the injectors is shorter than in the arrangements in which the flexible pipe extends usually up to the middle of the distribution channel air, which reduces pressure losses in this conduct.
  • the housing in which circulates ventilation air from injector noses and gasoline supply of these injectors is very easy to ascend.

Landscapes

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

Description

La présente invention concerne un agencement de moteur à injection d'essence comportant des injecteurs ventilés appelés habituellement injecteurs à manteau d'air.The present invention relates to an arrangement of petrol injection engine with injectors ventilated usually called mantle injectors of air.

On connaít déjà dans l'état de la technique, notamment d'après US-A-3 788 287, un agencement de moteur à injection d'essence, du type comprenant un ensemble d'injecteurs d'essence associés à des chambres de combustion de cylindres du moteur, un boítier rigide relié aux parties d'alimentation en essence des injecteurs, délimitant un canal de répartition d'essence dans l'ensemble des injecteurs, et un circuit de ventilation des nez des injecteurs comportant un canal de répartition d'air vers l'ensemble des nez, muni d'orifices débouchant au voisinage de ces nez, et des moyens de raccordement de ce canal de répartition d'air au reste du circuit de ventilation.We already know in the state of the art, in particular according to US-A-3,788,287, an engine arrangement with gasoline injection, of the type comprising a set fuel injectors associated with combustion of engine cylinders, a rigid case connected to the fuel supply parts of injectors, delimiting a fuel distribution channel in the set of injectors, and a circuit ventilation of the injector noses comprising a air distribution to all the noses, provided orifices opening in the vicinity of these noses, and means for connecting this air distribution channel to the rest of the ventilation circuit.

L'air ventilé au niveau du nez des injecteurs permet d'améliorer la pulvérisation de l'essence par augmentation de la vitesse relative entre l'air et l'essence.The air ventilated at the level of the nose of the injectors improves the spraying of gasoline by increase in relative speed between air and gasoline.

De façon classique, le moteur à essence est approvisionné en air au moyen d'un circuit comportant un filtre à air relié par un organe de raccordement intermédiaire à un boítier de papillon d'air lui-même relié à un collecteur d'admission des gaz du moteur. Le canal de répartition d'air du circuit de ventilation des nez des injecteurs est relié au filtre à air par une conduite souple reliée à l'organe de raccordement intermédiaire.Conventionally, the gasoline engine is supplied with air by means of a circuit comprising a air filter connected by an intermediate connection member to an air butterfly housing itself connected to a engine gas intake manifold. The canal air distribution of the ventilation circuit of the noses of injectors is connected to the air filter by a pipe flexible connected to the intermediate connection member.

L'agencement de cette conduite souple pose des problèmes d'encombrement et d'aspect d'esthétique.The arrangement of this flexible pipe poses problems of size and appearance.

L'invention a pour but de remédier à ces problèmes et de minimiser la longueur de la conduite souple afin de réduire les pertes de charge de l'air circulant dans cette conduite.The object of the invention is to remedy these problems and minimize the length of the flexible pipe in order to reduce the pressure losses of the circulating air in this conduct.

A cet effet, l'invention a pour objet un agencement de moteur à injection d'essence, du type précité, caractérisé en ce que les parties d'alimentation et les nez des injecteurs forment respectivement des extrémités opposées des injecteurs, le canal de répartition d'air étant séparé du boítier, et en ce que les moyens de raccordement du canal de répartition d'air au reste du circuit de ventilation comprennent un conduit d'alimentation en air intégré au boítier.To this end, the subject of the invention is an arrangement of a petrol injection engine, of the aforementioned type, characterized in that the supply parts and the noses of the injectors respectively form opposite ends of the injectors, the distribution channel air being separated from the housing, and in that the means for connecting the air distribution channel to the rest of the ventilation circuit comprise an air supply duct integrated into the housing.

Suivant des caractéristiques de différents modes de réalisation de l'invention :

  • le boítier comporte une cloison délimitant deux compartiments formant l'un le canal de répartition d'essence et l'autre le conduit d'alimentation en air ;
  • le boítier ayant une forme générale rectiligne parallèle à une direction d'alignement des injecteurs, le conduit d'alimentation en air s'étend suivant la longueur du boítier ;
  • le conduit d'alimentation en air comporte une première extrémité raccordée au reste du circuit de ventilation, disposée à une extrémité du boítier, et une seconde extrémité raccordée au canal de répartition d'air, disposée sensiblement au milieu du boítier ;
  • le canal de répartition d'air est relié au conduit d'alimentation en air par un conduit formant raccord rigide ;
  • les extrémités du raccord sont emmanchées de façon étanche respectivement dans un orifice communiquant avec le canal de répartition d'air et dans un embout relié au conduit d'alimentation en air, venu de matière avec le boítier ;
  • l'orifice de raccordement du canal de répartition d'air est muni de moyens de positionnement du raccord imposant une orientation prédéterminée du raccord avant montage du boítier ;
  • le raccord est venu de matière avec le boítier et son extrémité libre est emmanchée de façon étanche dans un orifice communiquant avec le canal de répartition d'air ;
  • le boítier est fabriqué en matière plastique.
According to the characteristics of different embodiments of the invention:
  • the housing includes a partition defining two compartments, one forming the fuel distribution channel and the other the air supply duct;
  • the housing having a generally rectilinear shape parallel to a direction of alignment of the injectors, the air supply duct extends along the length of the housing;
  • the air supply duct has a first end connected to the rest of the ventilation circuit, arranged at one end of the housing, and a second end connected to the air distribution channel, disposed substantially in the middle of the housing;
  • the air distribution channel is connected to the air supply duct by a duct forming a rigid connection;
  • the ends of the connector are fitted in a sealed manner respectively in an orifice communicating with the air distribution channel and in a nozzle connected to the air supply duct, integrally formed with the housing;
  • the connection orifice of the air distribution channel is provided with means for positioning the connector imposing a predetermined orientation of the connector before mounting the housing;
  • the connector came integrally with the housing and its free end is tightly fitted into an orifice communicating with the air distribution channel;
  • the housing is made of plastic.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective de la partie avant d'un véhicule automobile, avec un arrachement du capot du véhicule montrant un agencement de moteur selon l'invention ;
  • la figure 2 est une vue en perspective de la partie supérieure du moteur du véhicule montrant plus en détail l'agencement de la figure 1 ;
  • la figure 3 est une vue en coupe suivant la ligne 3-3 de la figure 2 ;
  • la figure 4 est une vue en coupe suivant la ligne 4-4 de la figure 2 ;
  • la figure 5 est une vue en coupe suivant la ligne 5-5 de la figure 3 ;
  • la figure 6 est une vue en coupe suivant la ligne 6-6 de la figure 3 ;
  • la figure 7 est une vue similaire à la figure 4 montrant une variante de réalisation du raccord reliant le conduit d'alimentation en air au canal de répartition en air.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • Figure 1 is a perspective view of the front part of a motor vehicle, with a cutaway of the vehicle hood showing an engine arrangement according to the invention;
  • Figure 2 is a perspective view of the upper part of the vehicle engine showing in more detail the arrangement of Figure 1;
  • Figure 3 is a sectional view along line 3-3 of Figure 2;
  • Figure 4 is a sectional view along line 4-4 of Figure 2;
  • Figure 5 is a sectional view along line 5-5 of Figure 3;
  • Figure 6 is a sectional view along line 6-6 of Figure 3;
  • Figure 7 is a view similar to Figure 4 showing an alternative embodiment of the connector connecting the air supply duct to the air distribution channel.

On a représenté sur la figure 1 une partie avant 10 de véhicule automobile, munie d'un capot 12 d'accès, dans laquelle est disposé transversalement un moteur 14 à injection d'essence. Cette partie avant 10 comporte un agencement de moteur selon l'invention, désigné par la référence générale 16.There is shown in Figure 1 a front part 10 of a motor vehicle, provided with an access cover 12, in which a motor 14 is arranged transversely gasoline injection. This front part 10 includes a engine arrangement according to the invention, designated by the general reference 16.

On reconnaít également sur la figure 1 des moyens classiques d'approvisionnement en air du moteur comprenant un filtre à air 18 relié à un boítier de papillon d'air 22 par un organe intermédiaire de raccordement 20 disposé entre ce filtre 18 et ce boítier 22, ce dernier étant lui-même relié à un collecteur d'admission des gaz 24 qui est montré plus en détail à la figure 2.We also recognize in Figure 1 means conventional engine air supply including an air filter 18 connected to a throttle body air 22 by an intermediate connection member 20 disposed between this filter 18 and this housing 22, the latter being itself connected to a gas intake manifold 24 which is shown in more detail in FIG. 2.

De façon classique, le moteur 14 comporte un bloc-cylindres non représenté sur les figures, dans lequel sont ménagés quatre cylindres alignés, et une culasse 26, représentée à la figure 3, rapportée sur le bloc-cylindres suivant un plan de joint 28.Conventionally, the motor 14 comprises a cylinder block not shown in the figures, in which are arranged four aligned cylinders, and one cylinder head 26, shown in FIG. 3, attached to the cylinder block along a joint plane 28.

Chaque cylindre comporte une chambre de combustion 30 fermée à sa partie supérieure par la culasse 26. Cette chambre 30 est reliée de façon connue en soi, d'une part à un conduit d'admission 32 lui-même raccordé à une tubulure 34 du collecteur 24, et d'autre part à un conduit d'échappement 36, les conduits d'admission et d'échappement étant formés dans la culasse 26.Each cylinder has a combustion chamber 30 closed at its upper part by the cylinder head 26. This chamber 30 is connected in a manner known per se, of a leaves to an intake duct 32 itself connected to a manifold 34 of manifold 24, and secondly to a exhaust duct 36, the intake ducts and being formed in the cylinder head 26.

La partie d'extrémité de chaque conduit d'admission 32 débouchant dans la chambre de combustion 30 comporte un orifice obturé par une soupape 38 représentée en trait mixte sur la figure 3.The end portion of each intake duct 32 opening into the combustion chamber 30 has an orifice closed by a valve 38 shown in phantom in Figure 3.

On reconnaít également sur la figure 3 une bougie d'allumage 40 et un injecteur d'essence 42 associés à chaque chambre de combustion 30, ces éléments étant connus en soi.We also recognize in Figure 3 a candle 40 and a fuel injector 42 associated with each combustion chamber 30, these elements being known per se.

Sur la figure 2, on voit que le moteur 14 comporte une rangée de quatre injecteurs 42. Ces derniers sont portés par exemple par le collecteur d'admission 24 par emboítement étanche de leur nez 44 dans des douilles 46 venues de matière avec le collecteur. Les nez 44 des injecteurs sont agencés dans les tubulures d'admission 34 suivant une disposition connue en soi qui ne sera pas décrite plus en détail.In FIG. 2, it can be seen that the motor 14 comprises a row of four injectors 42. These are carried for example by the intake manifold 24 by tight fitting of their nose 44 into sockets 46 material coming with the collector. The noses 44 of injectors are arranged in the intake pipes 34 according to a provision known per se which will not described in more detail.

Les extrémités 48 d'alimentation en essence des injecteurs sont reliées à un circuit d'alimentation en essence par un boítier rigide 50, en matière plastique, qui sera décrit plus en détail par la suite. The fuel supply ends 48 of the injectors are connected to a supply circuit in petrol by a rigid case 50, made of plastic, which will be described in more detail later.

L'agencement 16 comporte également un circuit de ventilation des nez 44 des injecteurs comprenant un canal de répartition d'air 52, de type connu, ménagé par exemple dans le collecteur 24 comme cela est représenté plus en détail sur la figure 6, muni d'orifices 54 débouchant au voisinage des nez 44 des injecteurs.The arrangement 16 also includes a circuit for ventilation of the noses 44 of the injectors comprising a channel air distribution 52, of known type, provided by example in manifold 24 as shown in more detail in Figure 6, provided with holes 54 opening out in the vicinity of the noses 44 of the injectors.

Ce canal 52 est alimenté en air provenant du filtre 18 par l'intermédiaire de l'organe de raccordement intermédiaire 20, d'une conduite souple 56 et du boítier 50 reliés en série (voir figure 1).This channel 52 is supplied with air from the filter 18 via the connection member intermediate 20, a flexible pipe 56 and the housing 50 connected in series (see Figure 1).

En se référant aux figures 2 et 5, on voit que le boítier 50 a une forme générale rectiligne parallèle à la direction d'alignement des injecteurs 42 et comporte une cloison longitudinale 57 délimitant deux compartiments formant l'un un canal 58 de répartition d'essence dans les injecteurs et l'autre un conduit 60 d'alimentation en air du canal de répartition d'air 52.Referring to Figures 2 and 5, we see that the box 50 has a generally rectilinear shape parallel to the alignment direction of the injectors 42 and comprises a longitudinal partition 57 delimiting two compartments one forming a fuel distribution channel 58 in the injectors and the other a conduit 60 for supplying air from air distribution channel 52.

Le canal de répartition d'essence 58 a une forme générale en chicane, connue en soi, de manière que des orifices 59A,59B d'arrivée d'essence et de refoulement d'essence non consommé par les injecteurs soient disposés à une même extrémité du boítier 50. On reconnaít sur la figure 2 des moyens classiques 62 de raccordement de ces orifices 59A,59B au reste du circuit d'alimentation en essence, ces moyens 62 étant venus de matière avec l'extrémité du boítier 50.The fuel distribution channel 58 has a shape general in chicane, known per se, so that ports 59A, 59B for fuel inlet and delivery gas not consumed by the injectors are disposed at the same end of the housing 50. We recognize on the Figure 2 conventional means 62 for connecting these orifices 59A, 59B to the rest of the supply circuit in gasoline, these means 62 having come of matter with the end of the housing 50.

De façon classique, le canal de répartition d'essence 58 comprend des orifices 64 d'alimentation des injecteurs 42 prolongés par des embouts 66 venus de matière avec le boítier 50 dans lesquels sont emboítées de façon étanche les extrémités d'alimentation des injecteurs.Conventionally, the distribution channel petrol 58 includes orifices 64 for supplying injectors 42 extended by nozzles 66 coming from material with the housing 50 in which are fitted sealingly the supply ends of the injectors.

Le conduit d'alimentation en air 60 s'étend suivant la longueur du boítier 50 et comporte une première extrémité raccordée à la conduite souple 56, disposée à l'extrémité du boítier opposée aux moyens 62, et une seconde extrémité raccordée au canal de répartition d'air, disposée sensiblement au milieu du boítier 50.The air supply duct 60 extends along the length of the housing 50 and has a first end connected to the flexible pipe 56, disposed at the end of the housing opposite the means 62, and a second end connected to the distribution channel air, arranged substantially in the middle of the housing 50.

Le conduit d'alimentation en air 60 est raccordé à la conduite souple 56 par un embout coudé 68 venu de matière avec le boítier 50 (voir figure 2) et au canal de répartition d'air 52 par un conduit coudé formant raccord rigide 70 dont les extrémités sont emmanchées de façon étanche respectivement dans un orifice 72 usiné dans le collecteur 24, communiquant avec le canal de répartition d'air 52, et dans un embout 74 relié au conduit d'alimentation en air 60, venu de matière avec le boítier 50 (voir figure 4).Air supply duct 60 is connected to the flexible pipe 56 by a bent end piece 68 coming from material with the housing 50 (see Figure 2) and the channel air distribution 52 by a bent duct forming a fitting rigid 70 whose ends are fitted so sealed respectively in an orifice 72 machined in the manifold 24, communicating with the distribution channel 52, and in a nozzle 74 connected to the supply duct in air 60, integral with the housing 50 (see figure 4).

L'orifice de raccordement 72 débouche sensiblement au milieu de la longueur du canal de répartition d'air 52 afin de permettre une bonne répartition de l'air dans ce canal et dans les orifices de ventilation 54.The connection orifice 72 opens out substantially in the middle of the length of the distribution channel air 52 to allow good air distribution in this channel and in the ventilation holes 54.

Sur les figures 4 à 6, on a représenté les sens de circulation de l'essence et de l'air par des flèches sans référence.Figures 4 to 6 show the directions of gasoline and air circulation by arrows without reference.

De façon classique, le boítier 50 est monté sur les injecteurs 42, après montage de ces derniers dans les douilles 46, en emboítant les embouts 66 sur les extrémités d'alimentation 48 des injecteurs.Conventionally, the housing 50 is mounted on the injectors 42, after assembly of the latter in the sockets 46, by fitting the ends 66 on the ends supply 48 of the injectors.

Dans l'agencement selon l'invention, l'orifice 72 de raccordement du canal de répartition d'air 52 est muni de moyens connus 76 de positionnement du raccord 70 (voir figure 4), imposant une orientation prédéterminée de ce raccord telle que l'embout 74 s'emboíte automatiquement sur le raccord 70 lors du montage du boítier 50 sur les injecteurs 42.In the arrangement according to the invention, the orifice 72 connection of the air distribution channel 52 is provided known means 76 for positioning the connector 70 (see Figure 4), imposing a predetermined orientation of this fitting such that the end piece 74 fits automatically on the fitting 70 when mounting the housing 50 on the injectors 42.

Sur la figure 7, on a représenté une variante de réalisation du raccord reliant le conduit d'alimentation en air 60 au canal de répartition d'air 52, le raccord étant désigné dans ce cas par la référence 70A. Dans cette variante, le raccord 70A est venu de matière avec le boítier 50 et son extrémité libre est emmanchée de façon étanche dans un orifice 72A, usiné dans le collecteur 24, communiquant avec le canal de répartition d'air 52.In FIG. 7, a variant of realization of the connection connecting the supply duct in air 60 to the air distribution channel 52, the fitting being designated in this case by the reference 70A. In this variant, the 70A fitting came integrally with the housing 50 and its free end is fitted with tightly sealed in an orifice 72A, machined in the manifold 24, communicating with the air distribution channel 52.

Cette variante de réalisation du raccord permet de simplifier les moyens de raccordement entre le conduit d'alimentation en air 60 et le canal de répartition d'air 52 en supprimant les moyens d'étanchéité entre le boítier et le raccord ainsi que les moyens de positionnement de ce raccord. Cette variante permet également un gain de temps lors du montage du boítier 50.This variant embodiment of the connector allows to simplify the means of connection between the conduit air supply 60 and the air distribution channel 52 by removing the sealing means between the housing and the connector as well as the positioning means of this fitting. This variant also allows a gain of time during assembly of the housing 50.

En se référant à nouveau aux figures 2 et 3, on voit que le boítier 50 comporte des moyens classiques de fixation sur une partie supérieure du moteur 14, par exemple un couvre-culasse, comportant des pattes transversales 78 venues de matière avec le boítier, munies de trous 80 de passage de vis de fixation (non représentées).Referring again to Figures 2 and 3, we sees that the housing 50 comprises conventional means of attachment to an upper part of the engine 14, by example a cylinder head cover, comprising transverse lugs 78 materials coming from the case, fitted with fixing screw passage holes 80 (not shown).

L'invention comporte de nombreux avantages.The invention has many advantages.

L'agencement de moteur selon l'invention permet de réaliser un circuit de ventilation des nez des injecteurs compact et esthétique grâce à l'intégration de la conduite d'alimentation en air dans le boítier rigide.The engine arrangement according to the invention allows to create a ventilation circuit for the injector noses compact and aesthetic thanks to the integration of the air supply line in the rigid housing.

Dans l'agencement de moteur selon l'invention, la conduite souple reliant l'organe intermédiaire de raccordement, disposé entre le filtre à air et le boítier de papillon d'air, à une extrémité du boítier rigide couvrant les injecteurs est plus courte que dans les agencements classiques dans lesquels la conduite souple s'étend généralement jusqu'au milieu du canal de répartition d'air, ce qui permet de réduire les pertes de charge dans cette conduite. In the engine arrangement according to the invention, the flexible pipe connecting the intermediate connection member, disposed between the air filter and the housing air butterfly, at one end of the rigid casing covering the injectors is shorter than in the arrangements in which the flexible pipe extends usually up to the middle of the distribution channel air, which reduces pressure losses in this conduct.

Par ailleurs, le boítier dans lequel circule l'air de ventilation des nez des injecteurs et l'essence d'alimentation de ces injecteurs est très facile à monter.In addition, the housing in which circulates ventilation air from injector noses and gasoline supply of these injectors is very easy to ascend.

Claims (9)

  1. Arrangement of a fuel-injected petrol engine (14) of the type comprising a set of petrol injectors (42) associated with combustion chambers (30) of cylinders of the engine; a rigid casing (50) connected to the parts (48) for supplying the injectors with petrol, delimiting a duct (58) for distributing petrol to all of the injectors; and a circuit for aerating the tips (44) of the injectors comprising a duct (52) for distributing air to all of the tips (44), equipped with orifices (54) which open close to these tips (44), and means (60, 70; 70A) for connecting this air-distribution duct (52) to the rest of the aeration circuit; characterized in that the supply parts (58) and the tips (44) of the injectors (42) respectively form opposite ends of the injectors, the air-distribution duct (52) being separate from the casing (50); and in that the means of connecting the air-distribution duct (52) to the rest of the aeration circuit comprise an air-supply passage (60) integral with the casing (50).
  2. Arrangement according to Claim 1, characterized in that the casing (50) has a partition (57) delimiting two compartments, one forming the petrol distribution duct (58) and the other the air-supply passage (60).
  3. Arrangement according to Claim 1 or 2, characterized in that,as the casing (50) has a straight overall shape parallel to a direction in which the injectors (42) are aligned, the air-supply passage (60) extends along the length of the casing (50).
  4. Arrangement according to Claim 3, characterized in that the air-supply passage (60) has a first end connected to the rest of the aeration circuit, this end being at one end of the casing (50), and a second end connected to the air-distribution duct (52), this second end being more or less at the middle of the casing (50).
  5. Arrangement according to Claim 4, characterized in that the air-distribution duct (52) is connected to the air-supply passage (60) by a passage which forms a rigid connection (70; 70A).
  6. Arrangement according to Claim 5, characterized in that the ends of the connection (70) are push-fitted in a sealed fashion respectively into an orifice (72) communicating with the air-distribution duct (52) and into a fitting (74) connected to the air-supply passage (60) and formed as an integral part of the casing (50).
  7. Arrangement according to Claim 6, characterized in that the connection orifice (72) of the air-distribution duct (52) is equipped with means (76) for positioning the connection (70) imposing a predetermined orientation on the connection (70) before the casing (50) is mounted.
  8. Arrangement according to Claim 5, characterized in that the connection (70A) is formed as an integral part of the casing (50) and its free end is push-fitted in a sealed fashion into an orifice (72A) communicating with the air-distribution duct (52).
  9. Arrangement according to any one of the preceding claims, characterized in that the casing (50) is made of plastic.
EP19940403012 1994-01-10 1994-12-23 Arrangement of a fuel injection engine having aerated injectors Expired - Lifetime EP0666417B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400176 1994-01-10
FR9400176A FR2714934B1 (en) 1994-01-10 1994-01-10 Fuel injection engine arrangement with ventilated injectors.

Publications (2)

Publication Number Publication Date
EP0666417A1 EP0666417A1 (en) 1995-08-09
EP0666417B1 true EP0666417B1 (en) 1998-05-06

Family

ID=9458884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940403012 Expired - Lifetime EP0666417B1 (en) 1994-01-10 1994-12-23 Arrangement of a fuel injection engine having aerated injectors

Country Status (3)

Country Link
EP (1) EP0666417B1 (en)
DE (1) DE69410074T2 (en)
FR (1) FR2714934B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2246368A1 (en) * 1996-02-12 1997-08-21 Filterwerk Mann & Hummel Gmbh Intake system
FR2779681B1 (en) * 1998-06-10 2000-08-04 Coutier Moulage Gen Ind INTAKE DISTRIBUTOR / INJECTION RAMP ASSEMBLY ASSEMBLED BY A QUICK CONNECTION DEVICE
DE10002439A1 (en) * 2000-01-21 2001-07-26 Bosch Gmbh Robert Fuel distributor part for fuel supply system in IC engines has flanged connection between fed pipe and plastic distributor body of flanged ring soldered to pipe and flanged collar on plastic body

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788287A (en) * 1972-02-18 1974-01-29 Gen Motors Corp Fuel injection system
US4475486A (en) * 1982-02-18 1984-10-09 General Motors Corporation Engine induction system
DE3228508A1 (en) * 1982-07-30 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart FUEL SUPPLY PIPE

Also Published As

Publication number Publication date
DE69410074T2 (en) 1999-01-07
EP0666417A1 (en) 1995-08-09
FR2714934A1 (en) 1995-07-13
FR2714934B1 (en) 1996-03-29
DE69410074D1 (en) 1998-06-10

Similar Documents

Publication Publication Date Title
EP0210098B1 (en) Cylinder head for a fuel injection internal-combustion engine
FR2475121A1 (en) INTERNAL COMBUSTION ENGINE WITH AIR COOLING
FR2660017A1 (en) DEVICE FOR ADMITTING AND DISCHARGING GASES IN AN INTERNAL COMBUSTION ENGINE AND MOTOR EQUIPPED WITH SAID DEVICE.
EP1020632B1 (en) Intake manifold with connecting means to an exhaust recirculation circuit
BE1015284A3 (en) Admission collector motor outboard.
EP1957787B1 (en) Air supply distributor for an internal combustion engine
FR2847307A1 (en) TWO-PART INTAKE MANIFOLD
EP0666417B1 (en) Arrangement of a fuel injection engine having aerated injectors
FR2641037A1 (en)
FR2726043A1 (en) INJECTOR COMPRISING A MAGNETIC VALVE CONTROL FOR INJECTING FUEL INTO THE COMBUSTION CHAMBER OF A DIESEL ENGINE
JP4353434B2 (en) FUEL SUPPLY DEVICE, VEHICLE, AND METHOD FOR ASSEMBLING FUEL SUPPLY DEVICE
EP0470874B1 (en) Internal combustion engine with an air inlet device integrated into the cylinder head
EP0846223B2 (en) Internal combustion engine intake manifold
JP3154878U (en) engine
US6745739B2 (en) Intake system of an engine
FR2894296A1 (en) SUPPLY AIR DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINE
FR2738035A1 (en) IC engine intake manifold with grouped auxiliary vacuum connections
EP0480787A1 (en) Internal combustion engine with a device for the insufflation of air into the exhaust conduit
EP0959233B1 (en) Internal combustion engine equipped with a compressor
US5909728A (en) Air assist device of an engine
FR2843173A1 (en) Injector for delivering gaseous fuel to internal combustion engine, comprises body with distribution and compensating chambers divided by membrane valve also communication channel between chambers
EP0669455A1 (en) Intake device for internal combustion engine
EP0907827B1 (en) System for directly injecting fuel into a cylinder combustion chamber of an internal combustion engine
KR100504616B1 (en) A port structure for an internal combustion engine
FR2848612A1 (en) Internal combustion engine e.g. naturally aspirated engine, air filter for automobile vehicle, has vessel bottom and cover assembled with waterproof according to peripheral joint line having form repeated cyclically on periphery

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950428

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT

17Q First examination report despatched

Effective date: 19970129

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 69410074

Country of ref document: DE

Date of ref document: 19980610

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980615

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20070115

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071212

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20071129

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20071129

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20081223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081223