EP0595696B1 - Speisevorrichtung mit einer integrierten Sammelleitung - Google Patents

Speisevorrichtung mit einer integrierten Sammelleitung Download PDF

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Publication number
EP0595696B1
EP0595696B1 EP93402599A EP93402599A EP0595696B1 EP 0595696 B1 EP0595696 B1 EP 0595696B1 EP 93402599 A EP93402599 A EP 93402599A EP 93402599 A EP93402599 A EP 93402599A EP 0595696 B1 EP0595696 B1 EP 0595696B1
Authority
EP
European Patent Office
Prior art keywords
casing
flange
air
housing
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93402599A
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English (en)
French (fr)
Other versions
EP0595696A1 (de
Inventor
Pierre Semence
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.)
Marelli France SAS
Original Assignee
Magneti Marelli France SAS
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Filing date
Publication date
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Publication of EP0595696A1 publication Critical patent/EP0595696A1/de
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Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02D41/3005—Details not otherwise provided for
    • 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
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026—Plenum chambers
    • F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
    • 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
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026—Plenum chambers
    • F02M35/10052—Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • 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
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078—Connections of intake systems to the engine
    • F02M35/10085—Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
    • 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
    • F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
    • 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
    • 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
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10249—Electrical or electronic devices fixed to the intake system; Electric wiring
    • 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
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
    • 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
    • F02M35/10354—Joining multiple sections together
    • 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
    • F02M35/10373—Sensors for intake systems
    • F02M35/1038—Sensors for intake systems for temperature or pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/21—Engine cover with integrated cabling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the invention relates to a supply device with integrated manifold, for an injection fuel supply installation, of the multipoint type, for an internal combustion engine, that is to say for a supply installation comprising, for each engine cylinder, at least one electrically controlled injector delivering fuel under pressure into a corresponding branch of intake manifold to the engine, opening into the cylinder head of the engine opposite the intake opening (s) of the corresponding cylinder and / or the tail of the corresponding intake valve or valves, the injection of fuel into the branch of the pipe being carried out, on the one hand, downstream of a throttle body, in which at least one throttling member , called a throttle valve, pivotally mounted on an axis in a conduit passing through the throttle body, is controlled in position directly or indirectly, from the accelerator pedal, and on the other hand, directly th n upstream of the corresponding intake valve (s), in general near the connection of this branch of tubing to the cylinder head of the engine.
  • a supply installation comprising, for each engine cylinder, at least one electrical
  • Such a supply device facilitates the mounting on the engine of many components of the multipoint injection installation, and not only components such as sensors and / or engine components of different engine operating parameters belonging to the supply circuit. in air, but also similar components of the associated fuel supply and electrical supply circuits for the injectors, as well as the electrical ignition circuit, while reducing the overall size of the installation, by simplifying the connections and the connections of these components, and by reducing the number and importance of the points and means of fixing these components to the engine.
  • the fuel injectors supply circuit is partially integrated into the tubing.
  • This circuit comprises an elongated casing, in one piece with the base, and integral with the flange for fixing the tubing integrated on the cylinder head, this casing being traversed by a fuel supply channel, which opens in series in housing cups injectors formed in the casing and each opening through an orifice in a branch of corresponding tubing, this casing also being traversed by a return channel of the excess fuel, which extends substantially parallel to the supply channel without opening into the cups injector housing, the supply and return channels being connected to each other by a regulator of the fuel supply pressure of the injectors, disposed at the end of the casing, on the side opposite to the respective connections of the channels supply and return to the fuel tank.
  • the problem underlying the invention is to remedy this drawback of supply devices of the type known by EP-A-0 294 083, and the object of the invention is to propose a supply device with integrated tubing for a multipoint injection installation which allows the assembly of top feed injectors of the type as well as, in a preferred embodiment, the assembly of ventilated or ventilated injectors.
  • Another object of the invention is to propose a supply device with integrated tubing for such an installation which can be presented to automobile manufacturers in the form of a set as complete as possible, precontrolled and possibly preset, suitable for mounting directly on the engine, and easy to connect to the parts of the air, fuel and electrical circuits which are not integrated into the manifold, so as to provide savings in assembly time and quality.
  • the subject of the invention is a supply device with integrated tubing, of the type presented above, known from EP-A-0 294 083, and which is characterized in that said fuel distribution rail and its tips are integrated into the housing having, between the two ends of the ramp, and for each injector, at least one orifice in communication with the interior of the ramp, for the supply of fuel to the corresponding injector.
  • the integration of the fuel distribution ramp in the housing makes it possible to supply the injectors in parallel and through their top, so that the assembly of injectors of the so-called "top feed injectors" type is favored.
  • the fuel supply for each injector is ensured in a sleeve, projecting from the housing, on the side facing towards at least one mounting flange on the cylinder head, and in which the corresponding injector is at least partially housed with a seal.
  • a base mounting flange has, on the side facing the housing, an injector receiving housing, opening into the corresponding branch of tubing and wherein the corresponding injector is at least partially housed with a seal.
  • the device supply according to the invention is advantageously such that an additional air supply ramp is integrated into the base, substantially at the junction of the branches of tubing and of a mounting flange for the base on the cylinder head, and has, on the one hand, at one of its ends, a tubular connection end piece for the supply of additional air taken from the air filter, downstream of the filter itself, and, on the other hand, for each injector, at least one orifice putting the interior of the additional air supply manifold in communication with the interior of an injector receiving housing, formed in the flange and / or the air supply manifold additional, on the side facing the housing, and opening into the corresponding branch of tubing, to at least partially house an injector of the ventilated type, supplied simultaneously with fuel and air.
  • the fuel pressure regulator supplied to the injectors is also trapped between the housing and the base of the block. This ensures protection not only of the injectors but also of the fuel pressure regulator due to their mounting between the base and the housing of the integrated tubing.
  • At least one base mounting flange on the cylinder head has, on the side facing the housing, a receiving bowl for the pressure regulator, cooperating with a housing sleeve for said regulator, projecting from the housing, on the side facing towards said fixing flange, and in communication with the fuel rail, so that, when the regulator is housed in the sleeve and in the bowl and the base is fixed on the housing, the regulator is in equilibrium between, by hand the pressure fuel in the rail, which it receives through a regulator part engaged with sealing in said sleeve, and, on the other hand, the air pressure in the block, which it receives through a regulator part engaged in said bowl, the interior of which is tightly connected, in the position of cooperation of the sleeve and of the bowl, with a channel formed in said sleeve and opening into the housing.
  • the box advantageously has at least one electrical connector mounted leaktight in a corresponding housing of the box, and ensuring the connection to at least one component carried in and / or on the block, such as an ignition coil.
  • each connector on the housing is for example obtained by overmolding the latter around the connector, since the housing and the base of the manifold-distributor block of the tubing are advantageously two molded plastic parts, and fixed to each other without resuming machining.
  • housings are provided receiving at least sensors for air circulation parameters intake, such as the temperature and air pressure sensors in the block, at least one power component such as an electrical ignition coil, at least one low power electrical connector, connected at least to the sensors and injectors, and at least one high power electrical connector, connected at least to the power component.
  • sensors for air circulation parameters intake such as the temperature and air pressure sensors in the block
  • at least one power component such as an electrical ignition coil
  • at least one low power electrical connector connected at least to the sensors and injectors
  • at least one high power electrical connector connected at least to the power component.
  • At least one bundle of electrical conductors preferably integrated in the plastic casing, ensures the connection to the electrical ground of each component incorporated in and / or on the manifold-distributor block.
  • the housing and the base of the block have a configuration such that the distance separating the center of gravity of the integrated tubing of the plane of attachment of the flange or flanges on the cylinder head is less than the distance separating the geometric center of said integrated tube of this plane of attachment of the flange or flanges on the cylinder head.
  • the housing has air outlet pipes, in number equal to the number of branches of tubing connected to said fixing flange, and each opening by one end in a central chamber of the housing called plenum, and by the other end in the housing flange fixed to that of the base, at an outlet opening in correspondence with a branch of tubing, so that each branch of tubing, which is bent at least in an upstream part connected to the flange of the base fixed to the housing, extends a corresponding air duct of the housing, also bent, the curved air ducts and the curved parts of the branches of tubing having their concavity turned towards said fixing flange on the cylinder head, so as to partially envelop the plenum and the various components trapped between the housing and the base and / or housed in / or on the housing.
  • the air filter is preferably also integrated into the air intake manifold-distributor block.
  • the electronic control unit, or engine supply computer is advantageously integrated into the air intake manifold-distributor block, in order to ensure its cooling by the circulation of air in the integrated tubing.
  • the air filter and the engine supply computer are integrated into the manifold-distributor block and associated with the latter in a pre-wired sub-assembly, which makes it possible to carry out tests. and checks, as well as compensation settings for the sub-assembly before it is mounted on the engine, and therefore provides a gain in quality and ease of assembly for the manufacturer.
  • the integrated supply device of FIG. 1 for a fuel supply installation by multipoint injection of an internal combustion engine with four cylinders in line, comprises an integrated pipe 1 comprising a block 2 intake manifold-distributor of air.
  • This block 2 is essentially constituted by the assembly of two molded plastic or metal parts and used without resumption of machining, one of which is an elongated housing 3, and the other a base 4, which has as many branches tubing 5 that the engine has cylinders, that is to say four in this example.
  • each of the branches 5 is integral with a flange 6 for fixing the pipe 1 to the cylinder head (not shown) of the engine.
  • Each branch 5 opens into the face of the flange 6 on the side opposite to the housing 3, and the flange 6 has holes 7 for its fixing by screwing on the cylinder head, so that each branch 5 opens into the cylinder head opposite the tail. of the injection valve (s) of the corresponding cylinder, when the pipe 1 is mounted on the cylinder head by its flange 6.
  • the base 4 also includes a connection flange to a flange, of conjugate shape, of the housing 3, and each branch 5 is secured by its other end to the flange of the base, in which each branch 5 opens by an inlet opening opposite a corresponding air outlet opening, formed in the flange of the housing 3
  • These two flanges are fixed by screwing one against the other, at the base of the housing 3, with the interposition of a seal between them so that the branches 5 thus open out. in the housing 3.
  • the latter has, laterally, an air supply orifice, also not shown in FIG. 1, to which is tightly connected a throttle body 8, optionally with incorporated flow meter, which is supported by the housing 3 so that the outlet of the throttle body opens into the housing 3.
  • An actuator 9 for example a stepping electric motor for regulating the flow of idle air or, optionally a direct current electric motor or other e for the throttle motorization, as well as a sensor 10 for the angular position of the throttle valve, such as a potentiometer, are integral with the throttle body 8, and one and / or the other are supported directly by the latter or alternatively by the housing 3.
  • the upper face of the housing 3 has, on the side of the throttle body 8, a housing for receiving a sensor 11 of the pressure of the intake air in the housing 3, and, on the opposite side, a housing for receiving an air temperature sensor 12 in this housing 3.
  • the inlet opening of the throttle body 8 is connected by a conduit 13 to the outlet of an air filter 14 on which the electronic control unit 15 is installed. of the installation.
  • the unit 15 and the air filter 14 are made integral with the integrated tubing 1, and carried, for example, by the housing 3, with which or which, they are integrated in a pre-wired sub-assembly allowing, before mounting on the engine, to carry out tests, checks and compensation adjustments, and facilitating mounting on the engine by allowing gains in quality and cost.
  • the integrated tubing 1 also includes a ramp 16 for distributing fuel to the injectors of the "top feed injectors" type.
  • This ramp 16 is integrated into the housing 3 and extends along the latter, on the side facing the flange 6.
  • the ends of the ramp 16 are fitted with tubular end pieces 17 and 18, which are connected one by one. supply line from the fuel tank, through a pump and filter, and the other to a line for returning excess fuel to the tank.
  • This excess is determined by a fuel pressure regulator 19, which is supported by the housing 3 and in communication, on the one hand, with the interior of the ramp 16, and on the other hand, with the interior of the housing 3, so as to be in balance between the fuel pressure in the rail 16 and the pressure of the intake air in the block 2.
  • the housing 3 has a supply port of the corresponding injector through its top, which is in communication with the interior of the ramp 16.
  • the injectors are each trapped between the housing 3 and the base 4, so as to each be supplied by its top and by the corresponding orifice for communication with the supply ramp 16, and so as to open, each by its opposite end and through a suitable orifice, in the corresponding branch 5.
  • the electrical ignition circuit of the engine comprises one or more high-voltage coils 20 and 21, which are mounted in housings provided at the upper part of the housing 3, and which are connected to the spark plugs of the engine by a bundle of conductive cables 22.
  • the electrical supply of the coils 20 and 21, and of the pressure and temperature sensors 11 and 12, as well as possibly of the stepping motor 9 and the potentiometer 10, the transmission to some of these components of electrical control signals coming from from the electronic control unit 15, and the return of electrical signals from the sensors 11 and 12 as well as from the potentiometer 10 to the electronic control unit 15 are provided using two electrical connectors 23 and 24, of which the one is a low power connector and the other is a high power connector. These connectors 23 and 24 are integrated into the housing 3, on the side of the latter opposite the flange 6. Each of the connectors 23 and 24 is mounted leaktight in its corresponding housing on the housing 3, for example by overmolding the latter, in material plastic around the corresponding connector.
  • all the components integrated and / or carried in and / or on the housing 3 of the manifold-distributor block 2 can be easily connected to the electrical circuits of the engine and of the vehicle by the connectors 23 and 24, the high power connector 24 being connected. to the power components such as the coils 20 and 21, while the low power connector 23 is connected to the sensors such as 11 and 12 and to the injectors.
  • this connection to ground is achieved by means of a bundle of electrically conductive wires which is integrated in the plastic casing 3.
  • the integrated tubing 31 comprises a manifold-air distributor 32, consisting of the assembly of two molded parts of plastic or metal, used without recovery machining, including a housing 33 and a base 34.
  • the base 34 comprises four branches of tubing 35, which are integral, by their downstream end, with the flange 36 for fixing to the cylinder head of the engine, this flange 36 being subdivided into two plates 36a and 36b, each of which carries, projecting from the same side as the branches 35, sockets 37 whose bore passes through the corresponding plate 36a or 36b for the passage of the fixing screws on the cylinder head (not shown).
  • Each branch 35 comprises two parts, including a downstream part 35a, cylindrical of circular section, by which the branch 35 is integral with the corresponding flange part 36a or 36b, and an upstream part 35b, which is curved and concavity turned towards the corresponding flange part 36a or 36b.
  • each branch 35 is integral with a flange 38 of the base, pierced with holes 39 for the passage of screws, for fixing the base 34 to the housing 33.
  • each branch 35 opens through an inlet opening 40 in the flange 38 for connection to the housing 33 and through an outlet opening 41 in the flange portion 36a or 36b for attachment to the cylinder head.
  • each downstream part 35a of branch to the corresponding flange part 36a or 36b has a through hole 42, which opens both into the face of the flange part 36a or 36b located on the opposite side to the corresponding branch 35, and in the outlet opening 41 of this branch 35.
  • this bore 42 is surrounded by an annular support seat 43 for an injector, and this seat 43 is itself partially surrounded, towards the corresponding branch 35, by a cup 44 delimiting with the bore 42 and the seat 43 a housing for the nose of an injector of the type supplied with fuel by its apex at the end opposite the nose.
  • the flange part 36a also has, on its face facing the flange 38 connecting to the housing 33, a bowl 45 for housing a part of a fuel pressure regulator, the structure of the bowl 45 as well as its cooperation with the regulator and with the housing 33 being described below with reference to Figure 7.
  • the housing 33 comprises an elongated part of substantially prismatic 46 or cylindrical shape, which delimits an internal chamber called plenum, open to the outside by an air inlet orifice formed in the end face of the part 46 which is not visible in the figures.
  • a throttle body to which is attached a sensor for the angular position of the throttle as well as an actuator for adjusting the idle air flow or for controlling the throttle, can be connected sealingly on the inlet port of the housing 33.
  • This box 33 comprises, on the side opposite the flange 36 when it is fixed to the base 34, air outlet pipes 47 (FIG. 4), in number equal to the branches 35, and each of which opens at its end. upstream in the plenum 46 and by its downstream end in a flange 48 of the housing 33, which has a shape combined with that of the flange 38 of the base 34, and is also pierced with holes 49 for the passage of the fixing screws of the two flanges 38 and 48 one against the other with the interposition of a seal, for fixing the housing 33 to the base 34, as shown in FIGS. 5 and 6.
  • the air ducts 47 are also curved and have their concavity turned towards the flange 36, and each opens into the flange 48 by an air outlet opening, directly opposite the air inlet opening 40 of the corresponding branch 35 and of the same shape , so that this branch 35 and this pipe 47 are in the extension of one of the other and partially envelop the plenum 46 and the various components trapped between the housing 33 and the base 34 and housed in and / or on the housing 33, as described below, in a configuration whose size is reduced while promoting good air supply to the engine.
  • the housing 33 On the side of the flange 36, the housing 33 has over its entire length an integrated fuel distribution ramp 50, supplied from the tank by a nozzle. inlet 51 at one end, and connected to a return to the tank by an outlet nozzle 52 at the other end.
  • the housing 33 also has, for housing the injectors, four cylindrical, parallel sleeves 53, regularly spaced, projecting laterally towards the flange 36, and the bottom of each of which is in communication with the interior of the ramp 50 by at least one fuel supply orifice of the corresponding injector.
  • Each of the four injectors 54 is of the so-called "top feed injector” type, with a nose surrounded by an O-ring seal which fits tightly in the corresponding housing (42-43-44) of the flange 36a or 36b of attachment to the cylinder head, while its rear or top part, also surrounded by an O-ring, fits tightly in the corresponding sleeve 53 to be supplied with fuel by the ramp 50, in parallel with the other injectors 54, the part injector central 54 having a connector 54a for the electrical supply of an actuating winding of the injector 54, this connector 54a projecting between the sleeve 53 and the corresponding cup 44, when, for each cylinder, l 'corresponding injector 54 is trapped between the housing 33 and the base 34 fixed one on the other.
  • the housing 33 also has a lateral projection, directly opposite the bowl 45, a cylindrical sleeve 55, in communication with the ramp 50, for housing part of a regulator 56 of the fuel pressure supplied to the injectors, and one of which other part is housed in the bowl 45, when the housing 33 and the base 34 are fixed to each other, so that the regulator 56, trapped between housing 33 and base 34, is then in balance between the pressure of fuel in the rail 50 and the air intake pressure in the plenum 46. This is obtained in the manner shown in FIG. 7.
  • the part 56b of the regulator 56 on the other side of a flange 56c of the regulator in abutment against the sleeve 55, is fitted with sealing by the O-ring 62 in a recess of the sleeve 55, and is extended by a nose 56d also mounted tight by an O-ring 63 in an internal channel 64 of the sleeve 55 and opening into the passage 50a in communication with the return to the reservoir, and the nose 56d of the regulator opens in this channel 64 so that the other face of the internal membrane of the regulator 56 receives the fuel pressure in the rail 50.
  • the housing 33 also has, on the side facing the flange 36, and near the sleeve 55, a platform 65 supported above a housing 66.
  • a pressure sensor 67 is mounted on the platform 65 (see FIGS. 5 and 6), and its probe passes tightly through the platform 65 to be sensitive to the pressure of the intake air in the plenum 46.
  • the housing 66 of the housing 33 also receives sensors or engine operating parameter control members, and in particular a sensor for the temperature of the intake air in the plenum 46.
  • the housing 66 can also enclose ignition coils which that the other sensors or control members housed or carried by the housing 33 can be connected, as in the example in FIG.
  • a bundle of electrically conductive wires can also be integrated in the plastic housing 33, to ensure the connection to the electrical ground of all the components integrated in the tubing.
  • the integrated tubing 31 of FIGS. 2 to 7 has a reduced bulk, because of its shape substantially closed on itself resulting from the partial enveloping of the housing 33 and of the components that it carries by the curved parts of the branches of tubing 35 and air ducts 47.
  • the overhang of the integrated tubing 31 fixed to the cylinder head of the engine is reduced, the more so as the distance between the flange 36 of attachment to the cylinder head and the center of gravity of the integrated tubing 31 is less than the distance between this flange 36 and the geometric center of the tubing 31, due to the mounting of most of the components integrated into the tubing 31 on the part of the housing 33 located on the side of the flange 36, and also due to the presence of the injectors 54 and the pressure regulator 55 trapped between the housing 33 and the flange 36 of the base 34. This results in better mechanical strength of this integrated tubing fixed to the cylinder head of the engine with a reduced overhang.
  • Figures 8 and 9 show a variant of the tubing of Figures 2 to 7, which is arranged to receive ventilated injectors. For this reason, the elements of the tubing of Figures 8 and 9 which are similar to those of the embodiment of Figures 2 to 7 are identified by the same reference numerals as in Figures 2 to 7 but assigned a prime symbol, and are not described again, except when they show significant differences.
  • the integrated tubing 31 'of Figures 8 and 9 differs essentially from that of Figures 2 to 7 by the structure of its base 34' (see Figure 8) which is integrated with a ramp 68 for supplying additional air.
  • This ramp 68 extends along the flange parts 36'a and 36'b for fixing to the cylinder head, on the side of the branches of the pipe 35'a-35'b rigidly connected to one another by a central web 69, integral with the flange 38 'of the base 35'.
  • the air ramp 68 is in one piece with the flange parts 36'a and 36'b and with the branches 35 ', perpendicular to the latter, in the angle formed at the junction between these elements.
  • the air ramp 68 has protruding and thickened parts 37 ′, pierced with holes for passage of the screws for fixing the manifold 31 ′ to the cylinder head, and corresponding to the sockets 37 of the example in FIGS. 2 to 7.
  • a end, the air ramp 68 has, projecting from the side of the branches 35 ′, a tubular end piece 70 for connection to an additional air intake pipe taken at atmospheric pressure in the air filter cover (not shown) ), downstream of the filter itself.
  • the other end of the air ramp 68 is closed at the level of a projecting part 37 'supporting by an arm 71 the bowl 45' for housing the fuel pressure regulator, this bowl 45 'being also supported by the part flange 36'a and by an end wall 72, the base of which is connected to the central web 69.
  • the air ramp 68 has, projecting from its upper face, a cup 44 ′ for housing the nose of a ventilated injector 54 ′, the cup 44 ′ simultaneously projecting laterally on the flange part 36'a or 36'b, on the side facing the housing 33 ', and open towards the sleeve 53' projecting from the housing 33 'and in communication with the ramp 50' of fuel distribution, which is integrated into the housing 33 'and supplied with fuel by the nozzle 51'.
  • the cup 44 ′ has an internal annular seat 43 ′ for supporting the nose of the injector 54 ′, and is extended by a through hole 42 ′, formed partly in the air ramp 68 and partly in the part of flange 36'a or 36'b, to open into the downstream end of the branch of tubing 35 '.
  • the air ramp 68 thus makes it possible to supply each of the aerated injectors 54 'with additional air at the level of its nose, while the supply of fuel to each injector 54' is ensured as in the previous example.
  • the air filter and the engine supply computer can be integrated into the integrated tubing 31 ′ and associated with it in a pre-wired sub-assembly, tested, checked and adjusted before mounting on engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (14)

  1. Speisevorrichtung mit einer integrierten Sammelleitung (1,31) zur Ausstattung einer Vielpunkteinspritzbrennstoffzuführung eines Motors mit interner Verbrennung mit einem Lufteinlaßsammel-Verteilerblock (2,32), der aus aneinander befestigten Gußstücken besteht, von denen das eine ein Lagergehäuse (3,33) der Sammelleitung darstellt, welche einen Luftzuführkanal, an dem ein Drosselklappenkörper (8) angeordnet ist, und Luftauslaßöffnungen aufweist, die in einem Verbindungsflansch (48) mit dem anderen Teil ausgespart sind, der einen Sockel (4,34) bildet, der wenigstens ebenso viele Leitungszweige (5,35) aufweist, wie der Motor Zylinder aufweist, und mit einen Verbindungsflansch (38) zum Gehäuse (3,33), der an dem Flansch (48) des Gehäuses (3,33) mit Zwischenanordnung einer Dichtungsverbindung fixiert ist, und in dem jeder Zweig (5,35) sich an einem seiner Enden über eine Eintrittsöffnung (40) öffnet, und zwar in Übereinstimmung mit jeweils einer der Austrittsöffnungen des Lagergehäuses (3,33), um in jenes letztgenannte zu münden, wobei die Leitungszweige (5,35) mit ihren anderen Enden fest mit wenigstens einem Befestigungsflansch (6,36) des Sockels (4,34) verbunden sind, wobei der Flansch mit Befestigungsmitteln (7,37) zur Befestigung der integrierten Sammelleitung (1,31) am Zylinderkopf des Motors versehen ist, wobei das Leitungsgehäuse (3,33) dergestalt angeordnet ist, daß es wenigstens teilweise wenigstens einen Sensor (10,11,12,67) und/oder wenigstens ein Steuerungsinstrument (8,9,19,20,21,54,56) für einen Motorfunktionsparameter trägt und/oder umfaßt, und wobei, für jeden Motorzylinder, jeder entsprechende Einspritzer (54) zwischen dem Gehäuse (33) und dem Sockel (34) des Blocks angeordnet ist und über eine Kraftstoffverteilungsleitung (16,50) mit Kraftstoff versorgt wird, die an jedem ihrer äußersten Enden einen Rohrstutzen (17,18;51,52) zur Verbindung der Leitung (16,50) jeweils mit einer Kraftstoffversorgungsleitung ausgehend von einem Tank, und einer Kraftstoffrückflußleitung zu dem Tank aufweist,
    dadurch gekennzeichnet,
    daß die Kraftstoffverteilungsleitung (16,50) und ihre Stutzen (17,18;51,52) in das Gehäuse (3,33) integriert sind, welches zwischen den beiden äußeren Endpunkten der Leitung (16,50) und für jeden Einspritzer (54) zur Kraftstoffversorgung des entsprechenden Injektors (54) wenigstens eine Verbindungsöffnung mit dem Inneren der Leitung (16,50) aufweist.
  2. Speisevorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß jede Kraftstoffversorgung eines Einspritzers (54) in einer Muffe (53) an einem Vorsprung des Gehäuses (33) benachbart zu wenigstens einem Befestigungsflansch (36) auf dem Zylinderkopf gemacht wird, und wobei in diesem der entsprechende Einspritzer (54) wenigstens teilweise mit einer Dichtungsverbindung versehen ist.
  3. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprü
    che 1 und 2, dadurch gekennzeichnet,
    daß für jeden Einspritzer (54) ein Befestigungsflansch (36) des Sockels (34) auf dem Zylinderkopf benachbart zum Gehäuse (33) ein Lager (42 bis 44) zur Aufnahme des Einspritzers aufweist, das in den entsprechenden Leitungszweig (35) mündet, und wobei in dem Lager der entsprechende Einspritzer (54) wenigstens teilweise mit einer Dichtungsverbindung versehen ist.
  4. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprüche 1 und 2, dadurch gekennzeichnet,
    daB eine Zuführleitung (68) für zusätzliche Luft in den Sockel (34') etwa in der Verbindung der Leitungszweige (35') und eines Befestigungsflansches (36'a - 36'b) des Sockels (34') auf dem Zylinderkopf integriert ist und einerseits an einem seiner Enden einen Rohrverbindungsstutzen (70) zur Zuführung zusätzlicher Luft, der aus einem Luftfilter entnommen wird genaugenommen stromabwärts des Filters, und andererseits für jeden Injektor (54') wenigstens eine Mündung aufweist, welche das Innere der Speisungsleitung (68) mit zusätzlicher Luft in Verbindung mit dem Inneren eines Lagers (42'-44') zur Aufnahme des Injektors (54') setzt, welches in dem Flansch (36'a - 36'b) und/oder der Zuführleitung (68) für zusätzliche Luft benachbart zum Gehäuse (33') ausgespart ist und in den entsprechenden Leitungszweig (35') mündet, um wenigstens bereichsweise einen Injektor (54') des Ventiltyps aufzunehmen, der gleichzeitig mit Kraftstoff und Luft gespeist wird.
  5. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprüche 1 bis 4,
    dadurch gekennzeichnet,
    daß ein Regulator (56) für den an die Injektoren (54) gelieferten Kraftstoffdruck zwischen dem Gehäuse (33) und dem Sokkel (34) des Blockes (32) eingeschlossen ist.
  6. Speisevorrichtung nach Anspruch 5,
    dadurch gekennzeichnet,
    daß wenigstens ein Befestigungsflansch (36) des Sockels (34) auf dem Zylinderkopf benachbart zum Gehäuse (33) ein Aufnahmeröhrchen (45 ) des Druckregulators (56) aufweist, welcher mit einer Muffe (55) zur Aufnahme des Regulators (56) als Vorsprung des Gehäuses (33) benachbart zum Befestigungsflansch (36) und in Kommunikation mit der Kraftstoffleitung (50) zusammenwirkt derart, wenn der Regulator (56) in der Muffe (55) und in dem Röhrchen (45) aufgenommen ist und wenn der Sockel auf dem Gehäuse (33) befestigt ist, der Regulator (56) im Gleichgewicht zwischen einerseits dem Kraftstoffdruck in der Leitung (50), den er durch einen Teil des mit Dichtmitteln (62,63) in die Muffe (55) eingreifenden Regulators (56b-56d) empfängt, und andererseits dem Luftdruck im Block (32), den er durch einen Teil des in das Röhrchen (45) eingreifenden Regulators (56a) empfängt, dessen Inneres in abdichtender Weise (58) in Kooperationsstellung zur Muffe (55) und des Röhrchens (45) mit einem Kanal (59) verbunden ist, welcher in der Muffe (55) ausgespart ist, und sich in das Gehäuse (33) erstreckt.
  7. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprüche 1 bis 6,
    dadurch gekennzeichnet,
    daß das Gehäuse (3) wenigstens einen elektrischen Anschluß (23,24) aufweist, der dicht in einer entsprechenden Aufnahme des Gehäuses (3) angeordnet ist, und die Verbindung mit wenigstens einem Bestandteil (9,10,11,20,21) sicherstellt, der in und/oder auf dem Block (2) getragen ist, z.B. eine Zündspule (20,21).
  8. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprüche 1 bis 7,
    dadurch gekennzeichnet,
    daß auf und/oder in dem Gehäuse (3,33) Ausnehmungen ausgespart sind, die wenigstens Sensoren (11,12,67) für Parameter der Luftzuführströmung, so wie Temperatursensoren (12) und Drucksensoren (11,67) der Luft in dem Block (2,32), wenigstens einen Leistungsbestandteil wie eine Zündspule (20,21), wenigstens einen elektrischen Verbinder mit einer Basisleistung (23), welche mit wenigstens den Sensoren (11,12,67) und den Injektoren (54) verbunden ist, und wenigstens einen elektrischen Verbinder mit hoher Leistung (24) aufnehmen, der wenigstens mit dem Leistungsbestandteil (20,21) verbunden ist.
  9. Speisevorrichtung nach Anspruch 8,
    dadurch gekennzeichnet,
    daß sie wenigstens ein Bündel elektrischer Leiter aufweist, das vorzugsweise in das Gehäuse (3,33) integriert ist, und die Verbindung mit der elektrischen Masse jedes Bestandteils (11,12,20,21;67,54) sicherstellt, der in und/oder auf dem Block (2,32) integriert ist.
  10. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprüche 1 bis 9,
    daß bestimmte wenigstens die in die Sammelleitung (31) integrierten Bestandteile (54,56,50,67) in und/oder auf einem Teil des Blocks (32) angeordnet sind, der benachbart zu dem oder den Befestigungsflansch (en) (36) auf dem Zylinderkopf angeordnet ist, und daß das Gehäuse (33) und der Sockel (34) des Blockes (32) eine solche Konfiguration aufweisen, daß der Abstand der den Schwerpunkt der integrierten Sammelleitung (31) in der Befestigungsebene des oder der Flansche(s) (36) auf dem Zylinderkopf trennt, geringer ist als der Abstand, der das geometrische Zentrum der integrierten Sammelleitung (31) in der Ebene der Befestigung des oder der Flansche (s) (36) auf dem Zylinderkopf trennt.
  11. Speisevorrichtung nach Anspruch 10,
    dadurch gekennzeichnet,
    daß benachbart zu wenigstens einem Befestigungsflansch (36) auf dem Zylinderkopf das Gehäuse (33) Luftaustrittsleitungen
    (47) in einer Zahl gleich der Anzahl der mit dem Befestigungsflansch (36) verbundenen Leitungszweige (35) aufweist, welche jeweils mit einem Ende in eine zentrale Kammer des Gehäuses, genannt Plenum (46), und mit dem anderen Ende im Flansch (48) des Gehäuses münden, der an dem Flansch (38) des Sockels (34) im Niveau einer Ausgangsöffnung in Übereinstimmung mit einem Leitungszweig (35) befestigt sind, derart, daß jeder Leitungszweig der wenigstens in einem stromaufwärtigen, mit dem Flansch (38) des am Gehäuse (33) befestigten Sockels (34) verbundenen Teil (35b) gewölbt ist, eine entsprechenden Luftleitung (47) des Gehäuses (33) verlängert, die gleichermaßen gewölbt ist, wobei die gewölbten Luftleitungen (47) und die gewölbten Teile (35b) der Leitungszweige (35) ihre Konkavität in Richtung gegen den Befestigungsflansch (36) auf dem Zylinderkopf aufweisen, derart, um bereichsweise das Plenum (46) und die verschiedenen Bestandteile (54,56,67) zu umschließen, die zwischen dem Gehäuse (33) und dem Sockel (34) und/oder den Lagern in oder auf dem Gehäuse (33) eingeschlossen sind.
  12. Speisevorrichtung nach irgendeinem der vorhergehenden Ansprüche 1 bis 11,
    dadurch gekennzeichnet,
    daß ein Luftfilter (14) in den Lufteinlaßsammelverteilerblock (2) integriert ist.
  13. Speisevorrichtung nach irgendeinem der Ansprüche 1 bis 12,
    dadurch gekennzeichnet,
    daß eine Recheneinrichtung (15) zur Speisung des Motors in den Lufteinlaßsammelverteilerblock (2) integriert ist.
  14. Speisevorrichtung nach Anspruch 13, mit dessen Rückbeziehung auf den Anspruch 12,
    dadurch gekennzeichnet,
    daß der Luftfilter (14) und die Recheneinrichtung (15) zur Speisung des Motors in den Lufteinlaßsammelverteilerblock (2) integriert sind und mit diesen letzteren durch eine vorverkabelte Unteranordnung verbunden sind.
EP93402599A 1992-10-26 1993-10-22 Speisevorrichtung mit einer integrierten Sammelleitung Expired - Lifetime EP0595696B1 (de)

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FR9212714A FR2697293B1 (fr) 1992-10-26 1992-10-26 Dispositif d'alimentation à tubulure intégrée.
FR9212714 1992-10-26

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ES2103450T3 (es) 1997-09-16
FR2697293B1 (fr) 1994-11-10
FR2697293A1 (fr) 1994-04-29
EP0595696A1 (de) 1994-05-04
US5357931A (en) 1994-10-25
DE69311498T2 (de) 1998-01-29
DE69311498D1 (de) 1997-07-17

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