EP3379066A1 - Integration of the drive cam of the hp pump on the flywheel - Google Patents

Integration of the drive cam of the hp pump on the flywheel Download PDF

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Publication number
EP3379066A1
EP3379066A1 EP18160571.8A EP18160571A EP3379066A1 EP 3379066 A1 EP3379066 A1 EP 3379066A1 EP 18160571 A EP18160571 A EP 18160571A EP 3379066 A1 EP3379066 A1 EP 3379066A1
Authority
EP
European Patent Office
Prior art keywords
crankshaft
cam
flywheel
actuating cam
chamber
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.)
Granted
Application number
EP18160571.8A
Other languages
German (de)
French (fr)
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EP3379066B1 (en
Inventor
Jean-Pierre Millon
Ludovic TESSIER
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Renault SAS
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Renault SAS
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Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP3379066A1 publication Critical patent/EP3379066A1/en
Application granted granted Critical
Publication of EP3379066B1 publication Critical patent/EP3379066B1/en
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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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0068—Adaptations for other accessories
    • 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
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0046—Shape of casings adapted to facilitate fitting or dismantling of engine parts
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

Definitions

  • the present invention relates to the field of motor vehicles and relates to a high pressure fuel supply pump.
  • the invention more particularly relates to an arrangement of an activation cam of the high pressure pump, integral in rotation with a crankshaft movable in rotation inside an inner chamber of a motor vehicle engine.
  • the invention also relates to an internal combustion engine of a motor vehicle comprising a crankcase surrounding a crankshaft having a high pressure fuel pump activation cam fixed on a flywheel which is connected to a coupling end of the crankshaft. crankshaft.
  • the invention relates to an internal combustion engine of a motor vehicle comprising a crankshaft movable in rotation about a longitudinal axis of the engine.
  • the fuel supply to the engine is performed by a high pressure pump that replaces a carburetor and is actuated by the rotation of the crankshaft.
  • a high pressure pump is fixed outside the engine and can be driven indirectly by the crankshaft via a motion transmission system, comprising pulleys and at least one transmission band which can be a chain or a belt.
  • the high pressure pump is actuated by a cam fixed to a rotating shaft about an axis parallel to the axis of the crankshaft, said shaft is rotated by the crankshaft through a transmission device comprising drive wheels substantially coplanar and fixed to the end of the crankshaft and the movable shaft and a belt surrounding said wheels.
  • the pump is conventionally a plateau pump which comprises an input shaft rotating a plate which is inclined relative to the axis and which is capable of biasing axial pistons movably mounted in chambers in which is admitted and ejected the fuel.
  • a motor comprising a pump comprising a single piston, whose body is fixed to the block and whose piston is alternately driven by a pusher whose end comprises a roller which is capable of being urged by a cam carried by a shaft internal to the engine block, said shaft being parallel to the crankshaft and being driven by said crankshaft via a gear.
  • Such a design has the advantage of being more compact than the conventional design, but it nevertheless has the disadvantage of requiring a motor block that can accommodate an additional shaft, with what this implies in terms of complexity of molding and machining additional said block.
  • the publication FR3011588-A1 discloses a cam mounted rotatably about an axis coincident with the axis of a motor vehicle engine crankshaft to actuate a high-pressure pump for supplying fuel to a combustion engine. Said cam is disposed between two arms of said crankshaft.
  • a disadvantage is that this arrangement requires pushing the space between the two arms which can be impacting for the architecture of the engine and substantially increases the size of said engine.
  • the document FR2 984 965 - A1 proposes an arrangement of a fuel pump at one end of a camshaft, said pump has a sliding axis coaxial with the axis of the camshaft.
  • the object of the invention is to remedy these problems and one of the objects of the invention is a particular arrangement of the actuating cam of a high pressure fuel supply pump at one end of the crankshaft.
  • the object of the invention relates to an arrangement of an actuating cam of the fuel pump at one end of the crankshaft facing the flywheel of the engine while minimizing the size of the engine.
  • the actuating cam is fixed to rotate with the flywheel which is itself secured to rotate with the crankshaft.
  • the arrangement of said cam integral with the flywheel also allows a connection in rotation of the cam with the crankshaft when said Flywheel is mounted at one end of the crankshaft at a low-cluttered location and therefore with minimal impact on engine clutter.
  • the integral connection of the cam with the flywheel also allows a simplified mounting of the actuating cam.
  • the actuating cam carries an annular seal to control the bulk of the arrangement.
  • the following description can take into account three spatial axes which are the longitudinal direction X of the engine, the transverse direction Y coplanar with the longitudinal direction X in a horizontal plane of the vehicle passing for example by the axles of the vehicle wheels and a Z direction vertical directed towards the top of the vehicle. It should be noted that the longitudinal direction X is with respect to the heat engine and is therefore orthogonal to the longitudinal direction of the vehicle for a transversely mounted motor.
  • an accessory side of the engine from which opens a first accessory end of the crankshaft around which is mounted at least one wheel (not shown) to cause rotation of the axes of the accessory elements (not shown). of the engine such as the water pump, and a coupling face which opens the coupling end of the crankshaft diametrically opposite the first end and connected with a flywheel and a gearbox (not shown).
  • a motor vehicle combustion engine 10 or internal combustion engine comprises a crankcase 11 comprising at least one cylinder 12 in which a piston (not shown) is able to slide in a back and forth movement along the vertical axis Z said cylinder and a cylinder head (not shown) covering the upper portion of the crankcase facing a motor vehicle hood.
  • the movements of the piston are caused by a variation of a combustion chamber defined by the wall 13 of at least one cylinder, said piston and the cylinder head.
  • the piston is connected to a crankshaft 14 arranged along an axis X substantially horizontal and orthogonal to the vertical axis Z.
  • a flywheel 15 is connected to the crankshaft driven by the pistons to absorb the irregularities of the engine torque and to reduce the acyclisms.
  • the flywheel 15 is arranged in known manner fixed to the coupling end 16 of the crankshaft and connected with the gearbox.
  • the face of the engine facing the flywheel is referred to as the coupling face 17.
  • a fuel pump (not shown) is associated with the engine 10 to inject into the fuel combustion chamber via injectors for example.
  • This pump may be a high pressure pump comprising a rod holding at a free end a drive roller bearing on a drive surface, said surface has corrugations and is movable, related to the rotation of the crankshaft.
  • This driving surface 19 is for example a peripheral surface of a cam 20 of substantially oblong shape which is secured to the crankshaft in rotation about its axis of rotation which is orthogonal to the plane of the cam and coincides with the axis of the cam. crankshaft.
  • the invention relates to an arrangement of the high pressure fuel supply pump actuated by means of an actuating cam 20 disposed at the coupling end of the crankshaft facing a coupling face 17 of the engine and connected to A flywheel 15.
  • said fuel pump is arranged radially to the axis of the cam and has a piston resting with the peripheral surface of said cam.
  • Said fuel supply pump is arranged according to the invention orthogonally to the axis X of the crankshaft and to the coupling end 17 'of said crankshaft 14.
  • the flywheel 15 carries the actuating cam 20, said cam is arranged opposite the crankshaft, that is to say that said cam is fixed mounted integral with the rotating flywheel and in translation, on the side of said steering wheel turned towards the crankshaft 14.
  • the Figures 2 to 5 represent embodiments of the invention.
  • the actuating cam 20 is substantially tubular in shape and has a substantially oblong cross-section. The shape of said cross section may however be different.
  • the actuating cam 20 comprises a substantially cylindrical longitudinal orifice 21 coaxial with the axis X of the cam which is adapted to surround the coupling end 17 'of the crankshaft. Said opening is extended along the X axis by a through orifice 22 which allows the passage of a fastening screw for securing the flywheel 15 with the crankshaft 14.
  • Said cam 20 is secured to the flywheel 15.
  • said cam comprises threaded orifices obtained for example by drilling parallel to the axis X of cam.
  • the steering wheel also has orifices passing through vis-à-vis the threaded holes of the cam to allow attachment of the cam with the steering wheel by means of fixing screws.
  • the flywheel 15 is fixed in known manner to the coupling end 17 'of the crankshaft so that the cam 20 is turned towards the crankshaft 14. The rotation of the crankshaft 14 then causes the rotation of the cam 20 which is able to actuate the piston of the fuel pump.
  • the cylinder block 11 comprises a wall 23 defining a reception chamber 24 for housing the actuating cam; said wall extends the cylinder housing along the longitudinal axis X and comprises a radial through opening (not shown) along a radial axis orthogonal to the longitudinal axis X for the passage of the substantially cylindrical body of the fuel pump.
  • Said reception room 24 is sealed by seals 25.
  • Said seals are arranged on both sides along the longitudinal axis X of the actuating cam.
  • the flywheel 15 is mounted fixed secured to the coupling end 17 'of the crankshaft 14.
  • the longitudinal orifice 21 of the cam 20 surrounds the coupling end 17 'of the crankshaft 14 to the mounting set near.
  • the cam is fixed by threaded connections to the flywheel 14 or to a disc forming said flywheel.
  • the cam is mounted housed in the reception chamber 24.
  • the fuel pump can be fixed to the wall 23 of the crankcase so that its axis is substantially orthogonal to the axis X of the crankshaft 14, the body of the pump passes through the radial opening in the wall 23 of the reception chamber 24.
  • the reception chamber 24 is delimited by seals.
  • a first seal 26 is disposed at a holding bearing 27 of the crankshaft and a second substantially annular seal 28 is arranged between the wall 23 of the housing and the cam preferably at a longitudinal end of the cam in contact with the steering wheel. 'inertia.
  • a supply duct (not shown) for lubricating liquid may be dug into the casing wall 23 to supply lubricating liquid to the contact surface of the cam with the fuel pump piston.
  • the flywheel has a tubular protrusion 29 which is mounted surrounding the coupling end 17 'of the crankshaft.
  • Said protrusion 29 has a substantially cylindrical recess 30 complementary to the coupling end 17 'of the crankshaft assembly play near.
  • the protrusion carries the actuating cam 20 mounted so that its axis of rotation coincides with the axis of the steering wheel.
  • the cam is preferably mounted by shrinking or welding surrounding the tubular protuberance 29.
  • the actuating cam 20 and the tubular protrusion 29 are turned towards the crankshaft 14 so that the coupling end 17 'of the crankshaft is driven into the recess 30 of said protuberance 29, the cam 20 then surrounds said coupling end 17 'of the crankshaft.
  • the flywheel 15 is fixed to the end of the crankshaft through the threaded connection.
  • a first seal 26 is disposed at a bearing support 27 of the crankshaft and a second substantially annular seal 28 is arranged between the wall 23 of the housing and a longitudinal end of the cam 20 in contact with the crankcase. the flywheel or between the wall 23 and a longitudinal end of the tubular protuberance near a disk forming the flywheel.
  • the actuating cam 20 carried by the tubular protuberance 29 of the flywheel is housed directly in a chamber of connecting rods 34 in which at least one crank pin 31 is also housed, and at least one a journal 32 forming the crankshaft.
  • the support bearing 27 of the crankshaft surrounds in this case the tubular protuberance 29 of the flywheel 15.
  • the actuating cam 20 housed in the connecting rod chamber 34 then has an oil mist invading said connecting rod chamber when the operation of the engine which can avoid the creation of a supply line of lubricating liquid to the contact surface of the actuating cam 20 with the piston of the fuel pump.
  • the fuel pump arrangement according to the invention has little impact in space of the engine.
  • the invention is not limited to the embodiments of this plug, described above as examples, it encompasses all variants.
  • the actuating cam can be integrated in the flywheel or part of said flywheel, without departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

Agencement d'une came d'actionnement d'une pompe à carburant à une extrémité du vilebrequin tournée vers le volant d'inertie du moteur comprenant : - un carter d'huile (13) au-dessus duquel est fixé - un carter-cylindres (10) comportant une chambre (11) de bielles délimitée par une paroi (15) présentant un orifice (16) destiné à être traversé par une extrémité (17) d'un vilebrequin (12) logé dans ladite chambre, - et un volant d'inertie (20) fixé solidaire en rotation à ladite extrémité et disposé à l'extérieur de ladite chambre, ledit volant moteur (20) comportant une protubérance tubulaire (22) apte à entourer l'extrémité (17) du vilebrequin, ladite protubérance (22) du volant débouchant à l'intérieur de la chambre (11) par l'orifice circulaire (16), caractérisé en ce que la came d'actionnement est fixée solidaire avec le volant d'inertie.An arrangement of an actuating cam of a fuel pump at one end of the crankshaft facing the engine flywheel comprising: - an oil pan (13) above which is fixed - a cylinder block (10) having a chamber (11) connecting rods defined by a wall (15) having an orifice (16) to be traversed by an end (17) of a crankshaft (12) housed in said chamber , - And an inertia flywheel (20) secured to rotate with said end and disposed outside said chamber, said flywheel (20) having a tubular protrusion (22) adapted to surround the end (17) of the crankshaft, said protuberance (22) of the flywheel opening into the chamber (11) through the circular orifice (16), characterized in that the actuating cam is secured to the flywheel.

Description

Domaine technique de l'inventionTechnical field of the invention

La présente invention se rapporte au domaine des véhicules automobiles et concerne une pompe haute pression d'alimentation en carburant.The present invention relates to the field of motor vehicles and relates to a high pressure fuel supply pump.

L'invention concerne plus particulièrement un agencement d'une came d'activation de la pompe haute pression, solidaire en rotation d'un vilebrequin mobile en rotation à l'intérieur d'une chambre intérieure d'un moteur thermique de véhicule automobile.The invention more particularly relates to an arrangement of an activation cam of the high pressure pump, integral in rotation with a crankshaft movable in rotation inside an inner chamber of a motor vehicle engine.

L'invention concerne également un moteur à combustion interne de véhicule automobile comportant un carter-cylindres entourant un vilebrequin comportant une came d'activation de pompe à carburant haute pression fixée sur un volant d'inertie qui est connecté à une extrémité d'accouplement du vilebrequin.The invention also relates to an internal combustion engine of a motor vehicle comprising a crankcase surrounding a crankshaft having a high pressure fuel pump activation cam fixed on a flywheel which is connected to a coupling end of the crankshaft. crankshaft.

Etat de la techniqueState of the art

L'invention concerne un moteur à combustion interne de véhicule automobile comportant un vilebrequin mobile en rotation autour d'un axe longitudinal du moteur. L'alimentation en carburant du moteur est effectuée grâce à une pompe haute pression qui remplace un carburateur et qui est actionnée par la rotation du vilebrequin.The invention relates to an internal combustion engine of a motor vehicle comprising a crankshaft movable in rotation about a longitudinal axis of the engine. The fuel supply to the engine is performed by a high pressure pump that replaces a carburetor and is actuated by the rotation of the crankshaft.

Différents agencements de pompes haute pression fixés à un moteur thermique sont connus.Various arrangements of high pressure pumps attached to a heat engine are known.

Selon une manière connue, une pompe haute pression est fixée extérieure au moteur et peut être entraînée indirectement par le vilebrequin par l'intermédiaire d'un système de transmission de mouvement, comprenant des poulies et au moins une bande de transmission qui peut être une chaîne ou une courroie. Par exemple, la pompe haute pression est actionnée par une came fixée à un arbre mobile en rotation autour d'un axe parallèle à l'axe du vilebrequin, ledit arbre est entrainé en rotation par le vilebrequin grâce à un dispositif de transmission comprenant des roues d'entrainement sensiblement coplanaires et fixées à l'extrémité du vilebrequin et de l'arbre mobile et une courroie entourant lesdites roues.According to a known manner, a high pressure pump is fixed outside the engine and can be driven indirectly by the crankshaft via a motion transmission system, comprising pulleys and at least one transmission band which can be a chain or a belt. For example, the high pressure pump is actuated by a cam fixed to a rotating shaft about an axis parallel to the axis of the crankshaft, said shaft is rotated by the crankshaft through a transmission device comprising drive wheels substantially coplanar and fixed to the end of the crankshaft and the movable shaft and a belt surrounding said wheels.

La pompe est conventionnellement une pompe à plateau qui comporte un arbre d'entrée entraînant en rotation un plateau qui est incliné par rapport à l'axe et qui est susceptible de solliciter des pistons axiaux montés mobiles dans des chambres dans lesquelles est admis puis éjecté le carburant.The pump is conventionally a plateau pump which comprises an input shaft rotating a plate which is inclined relative to the axis and which is capable of biasing axial pistons movably mounted in chambers in which is admitted and ejected the fuel.

Il est aussi connu de l'état de la technique, et notamment du document DE102011107291 un moteur comportant une pompe comportant un piston unique, dont le corps est fixé au bloc et dont le piston est entraîné alternativement par un poussoir dont l'extrémité comporte d'un galet qui est susceptible d'être sollicité par une came portée par un arbre interne au bloc du moteur, ledit arbre étant parallèle au vilebrequin et étant entraîné par ledit vilebrequin par l'intermédiaire d'un engrenage.It is also known from the state of the art, and in particular the document DE102011107291 a motor comprising a pump comprising a single piston, whose body is fixed to the block and whose piston is alternately driven by a pusher whose end comprises a roller which is capable of being urged by a cam carried by a shaft internal to the engine block, said shaft being parallel to the crankshaft and being driven by said crankshaft via a gear.

Une telle conception présente l'avantage d'être plus compacte que la conception conventionnelle, mais elle présente néanmoins l'inconvénient de nécessiter un bloc moteur pouvant accueillir un arbre supplémentaire, avec ce que cela implique en termes de complexité de moulage et d'usinages supplémentaires dudit bloc.Such a design has the advantage of being more compact than the conventional design, but it nevertheless has the disadvantage of requiring a motor block that can accommodate an additional shaft, with what this implies in terms of complexity of molding and machining additional said block.

La publication FR3011588-A1 divulgue une came montée mobile en rotation autour d'un axe confondu avec l'axe d'un vilebrequin de moteur thermique de véhicule automobile pour actionner une pompe haute pression d'alimentation en carburant de moteur thermique. Ladite came est disposée entre deux bras dudit vilebrequin.The publication FR3011588-A1 discloses a cam mounted rotatably about an axis coincident with the axis of a motor vehicle engine crankshaft to actuate a high-pressure pump for supplying fuel to a combustion engine. Said cam is disposed between two arms of said crankshaft.

Un inconvénient est que cet agencement nécessite de repousser l'espace entre les deux bras ce qui peut être impactant pour l'architecture du moteur et augmente sensiblement l'encombrement dudit moteur.A disadvantage is that this arrangement requires pushing the space between the two arms which can be impacting for the architecture of the engine and substantially increases the size of said engine.

Le document FR2 984 965 - A1 propose un agencement d'une pompe à carburant à une extrémité d'un arbre à cames, ladite pompe présente un axe de coulissement coaxial avec l'axe de l'arbre à cames.The document FR2 984 965 - A1 proposes an arrangement of a fuel pump at one end of a camshaft, said pump has a sliding axis coaxial with the axis of the camshaft.

L'inconvénient de ce type d'agencement est un accroissement sensible de la dimension longitudinale du moteur ce qui est contraignant pour des véhicules comportant un compartiment moteur avec des dimensions réduites.The disadvantage of this type of arrangement is a significant increase in the longitudinal dimension of the engine which is restrictive for vehicles having a motor compartment with reduced dimensions.

Le but de l'invention est de remédier à ces problèmes et un des objets de l'invention est un agencement particulier de la came d'actionnement d'une pompe haute pression d'alimentation de carburant à une extrémité du vilebrequin.The object of the invention is to remedy these problems and one of the objects of the invention is a particular arrangement of the actuating cam of a high pressure fuel supply pump at one end of the crankshaft.

Bref résumé de l'inventionBrief summary of the invention

L'objet de l'invention concerne un agencement d'une came d'actionnement de la pompe à carburant à une extrémité du vilebrequin tournée vers le volant d'inertie du moteur en minimisant l'encombrement du moteur.The object of the invention relates to an arrangement of an actuating cam of the fuel pump at one end of the crankshaft facing the flywheel of the engine while minimizing the size of the engine.

L'objet de l'invention concerne plus particulièrement un agencement d'une came d'actionnement d'une pompe à carburant à une extrémité du vilebrequin tournée vers le volant d'inertie du moteur comprenant :

  • un carter d'huile au-dessus duquel est fixé
  • un carter-cylindres comportant une chambre de bielles délimitée par une paroi présentant un orifice destiné à être traversé par une extrémité d'un vilebrequin logé dans ladite chambre,
  • et un volant d'inertie fixé solidaire en rotation à ladite extrémité du vilebrequin et disposé à l'extérieur de ladite chambre, ledit volant d'inertie comportant une protubérance tubulaire apte à entourer l'extrémité du vilebrequin, ladite protubérance du volant débouchant à l'intérieur de la chambre par l'orifice circulaire,
caractérisé en ce que la came d'actionnement est fixée solidaire avec le volant d'inertie.The subject of the invention relates more particularly to an arrangement of an actuating cam of a fuel pump at one end of the crankshaft facing the flywheel of the engine comprising:
  • an oil pan above which is fixed
  • a cylinder block comprising a connecting rod chamber delimited by a wall having an orifice intended to be traversed by an end of a crankshaft housed in said chamber;
  • and a fixed flywheel fixed to rotate with said end of the crankshaft and disposed outside said chamber, said flywheel having a tubular protuberance adapted to surround the end of the crankshaft, said protuberance of the flywheel opening to the inside the chamber through the circular orifice,
characterized in that the actuating cam is secured to the flywheel.

De manière avantageuse, la came d'actionnement est fixée solidaire en rotation au volant d'inertie qui est lui-même fixé solidaire en rotation avec le vilebrequin. L'agencement de ladite came solidaire du volant moteur permet également une liaison en rotation de la came avec le vilebrequin lorsque ledit volant moteur est monté à une extrémité du vilebrequin à un emplacement peu encombré et donc avec un impact minime sur l'encombrement du moteur. La liaison solidaire de la came avec le volant d'inertie permet également un montage simplifié de la came d'actionnement.Advantageously, the actuating cam is fixed to rotate with the flywheel which is itself secured to rotate with the crankshaft. The arrangement of said cam integral with the flywheel also allows a connection in rotation of the cam with the crankshaft when said Flywheel is mounted at one end of the crankshaft at a low-cluttered location and therefore with minimal impact on engine clutter. The integral connection of the cam with the flywheel also allows a simplified mounting of the actuating cam.

Selon d'autres caractéristiques de l'invention :

  • la came est montée entourant l'extrémité du vilebrequin.
According to other features of the invention:
  • the cam is mounted around the end of the crankshaft.

De manière avantageuse, l'agencement de la came entourant l'extrémité du vilebrequin permet une optimisation de l'encombrement du moteur notamment en minimisant la longueur du moteur selon l'axe longitudinal.

  • la protubérance tubulaire porte la came d'actionnement.
Advantageously, the arrangement of the cam surrounding the end of the crankshaft makes it possible to optimize the overall size of the engine, in particular by minimizing the length of the engine along the longitudinal axis.
  • the tubular protuberance carries the actuating cam.

De manière avantageuse, la came d'actionnement de la pompe à carburant est portée par la protubérance tubulaire du volant moteur pénétrant dans la chambre intérieure du moteur par un orifice creusé dans le carter-cylindres en regard avec une extrémité du vilebrequin, ledit orifice étant traversé par la protubérance tubulaire, ce qui permet un montage simple de la came autour de l'extrémité du vilebrequin.

  • la came est montée entourant la protubérance par frettage ou soudure.
Advantageously, the actuating cam of the fuel pump is carried by the tubular protuberance of the flywheel penetrating into the inner chamber of the engine through an orifice cut in the crankcase facing one end of the crankshaft, said orifice being traversed by the tubular protuberance, which allows a simple mounting of the cam around the end of the crankshaft.
  • the cam is mounted surrounding the protuberance by hooping or welding.

De manière avantageuse, la came est montée autour de la protubérance tubulaire par frettage ou soudure, ce qui permet un positionnement précis de la came par rapport au vilebrequin.

  • la came d'actionnement est entourée par la paroi du carter-cylindres.
Advantageously, the cam is mounted around the tubular protuberance by shrinking or welding, which allows precise positioning of the cam relative to the crankshaft.
  • the actuating cam is surrounded by the wall of the crankcase.

De manière avantageuse, la came d'actionnement ainsi que la pompe à carburant sont entourées par la paroi du carter-cylindres ce qui permet d'assurer une étanchéité de l'ensemble à moindre coût.

  • le carter-cylindres comporte un évidement prolongé radialement à l'axe du vilebrequin par un orifice, pour loger la pompe à carburant.
Advantageously, the actuating cam and the fuel pump are surrounded by the wall of the cylinder block which makes it possible to seal the assembly at a lower cost.
  • the cylinder block has a recess extended radially to the axis of the crankshaft by an orifice, for housing the fuel pump.

De manière avantageuse, un évidement est ménagé dans le carter cylindres à une extrémité longitudinale dudit carter en vis-à-vis du volant moteur pour former une chambre d'accueil destiné à loger la pompe à carburant.

  • la came est logée dans la chambre de bielles.
Advantageously, a recess is formed in the crankcase at a longitudinal end of said housing opposite the flywheel to form a receiving chamber for housing the fuel pump.
  • the cam is housed in the connecting rod chamber.

De manière avantageuse, la came est logée directement dans la chambre de bielles et bénéficie de la circulation d'huile dans ladite chambre pour la lubrification des contacts entre la came et le piston de la pompe à carburant. De ce fait, l'agencement de came à l'intérieur de la chambre de bielles peut permettre d'éviter la définition d'un conduit de lubrification.

  • le carter cylindres comporte une chambre d'accueil séparée de la chambre de bielles selon l'axe longitudinal du carter-cylindres pour loger la came d'actionnement.
Advantageously, the cam is housed directly in the connecting rod chamber and benefits from the circulation of oil in said chamber for lubricating the contacts between the cam and the piston of the fuel pump. As a result, the cam arrangement inside the connecting rod chamber can make it possible to avoid the definition of a lubrication duct.
  • the cylinder block comprises a chamber separate from the connecting rod chamber along the longitudinal axis of the cylinder block to accommodate the actuating cam.

De manière avantageuse, le carter-cylindres comporte une chambre d'accueil pour loger la came d'actionnement ainsi que la pompe à carburant, ladite chambre étant séparée de la chambre de bielles.

  • la chambre d'accueil est fermée de façon étanche par des joints annulaires.
Advantageously, the crankcase comprises a chamber for accommodating the actuating cam and the fuel pump, said chamber being separated from the connecting rod chamber.
  • the reception chamber is sealed by annular seals.

De manière avantageuse, la chambre d'accueil où est logée la came et la pompe à carburant est isolée de façon étanche de la chambre de bielles pour la fiabilité de fonctionnement de la pompe.

  • la came porte un joint d'étanchéité.
Advantageously, the chamber where the cam is housed and the fuel pump is sealed from the connecting rod chamber for the reliable operation of the pump.
  • the cam carries a seal.

De manière avantageuse, la came d'actionnement porte un joint d'étanchéité annulaire pour maitriser l'encombrement de l'agencement.Advantageously, the actuating cam carries an annular seal to control the bulk of the arrangement.

Brève description des figuresBrief description of the figures

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

  • la figure 1 est une vue schématique de coupe longitudinale d'un moteur.
  • la figure 2 est une vue schématique de coupe longitudinale d'une extrémité du moteur côté accouplement du moteur avec un agencement d'une came d'actionnement selon un mode de réalisation de l'invention.
  • la figure 3 est une vue schématique du volant d'inertie avec une came d'actionnement selon un mode de réalisation de l'invention.
  • la figure 4 est une vue schématique de coupe longitudinale d'une extrémité du moteur côté accouplement du moteur avec un agencement d'une came d'actionnement selon un autre mode de réalisation de l'invention.
  • la figure 5 est une vue schématique de coupe longitudinale d'une extrémité du moteur côté accouplement du moteur avec un agencement d'une came d'actionnement selon un autre mode de réalisation de l'invention.
Other features 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:
  • the figure 1 is a schematic view of a longitudinal section of an engine.
  • the figure 2 is a schematic view of a longitudinal section of an end of the motor coupling side of the motor with an arrangement of an actuating cam according to an embodiment of the invention.
  • the figure 3 is a schematic view of the flywheel with an actuating cam according to an embodiment of the invention.
  • the figure 4 is a schematic view of a longitudinal section of an end of the motor coupling side of the motor with an arrangement of an actuating cam according to another embodiment of the invention.
  • the figure 5 is a schematic view of a longitudinal section of an end of the motor coupling side of the motor with an arrangement of an actuating cam according to another embodiment of the invention.

Description détaillée des figuresDetailed description of the figures

Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires.In the following description, like reference numerals designate like parts or having similar functions.

La description qui suit peut prendre en compte trois axes spatiaux qui sont la direction longitudinale X du moteur, la direction transversale Y coplanaire avec la direction longitudinale X selon un plan horizontal du véhicule passant par exemple par les essieux des roues du véhicule et une direction Z verticale dirigée vers le haut du véhicule. Il faut noter que la direction longitudinale X est par rapport au moteur thermique et de ce fait est orthogonale à la direction longitudinale du véhicule pour un moteur monté transversalement.The following description can take into account three spatial axes which are the longitudinal direction X of the engine, the transverse direction Y coplanar with the longitudinal direction X in a horizontal plane of the vehicle passing for example by the axles of the vehicle wheels and a Z direction vertical directed towards the top of the vehicle. It should be noted that the longitudinal direction X is with respect to the heat engine and is therefore orthogonal to the longitudinal direction of the vehicle for a transversely mounted motor.

Dans la description qui suit, on distingue une face accessoires du moteur de laquelle débouche une première extrémité d'accessoires du vilebrequin autour de laquelle est montée au moins une roue (non représentée) pour entrainer en rotation des axes des éléments accessoires (non représentés) du moteur tels que la pompe à eau, et une face d'accouplement de laquelle débouche l'extrémité d'accouplement du vilebrequin diamétralement opposée à la première extrémité et connectée avec un volant d'inertie et une boite de vitesses (non représentée).In the following description, there is an accessory side of the engine from which opens a first accessory end of the crankshaft around which is mounted at least one wheel (not shown) to cause rotation of the axes of the accessory elements (not shown). of the engine such as the water pump, and a coupling face which opens the coupling end of the crankshaft diametrically opposite the first end and connected with a flywheel and a gearbox (not shown).

De manière connue, selon la figure 1, un moteur thermique 10 ou à combustion interne de véhicule automobile comprend un carter-cylindres 11 comportant au moins un cylindre 12 dans lequel un piston (non représenté) est apte à coulisser en un mouvement de va-et-vient selon l'axe vertical Z dudit cylindre et une culasse (non représentée) recouvrant la partie supérieure du carter-cylindres tournée vers un capot de moteur du véhicule. Les mouvements du piston sont entrainés par une variation d'une chambre à combustion délimitée par la paroi 13 du au-moins un cylindre, ledit piston et la culasse. Le piston est lié à un vilebrequin 14 agencé selon un axe X sensiblement horizontal et orthogonal à l'axe vertical Z. Les mouvements de coulissement en va-et-vient du piston entraine un mouvement en rotation du vilebrequin. Les déplacements en coulissement du piston ne sont cependant pas effectués de manière régulière et produisent des acyclismes qui se répercutent sur des éléments de transmission reliés audit moteur 10 et particulièrement au vilebrequin.In a known manner, according to figure 1 a motor vehicle combustion engine 10 or internal combustion engine comprises a crankcase 11 comprising at least one cylinder 12 in which a piston (not shown) is able to slide in a back and forth movement along the vertical axis Z said cylinder and a cylinder head (not shown) covering the upper portion of the crankcase facing a motor vehicle hood. The movements of the piston are caused by a variation of a combustion chamber defined by the wall 13 of at least one cylinder, said piston and the cylinder head. The piston is connected to a crankshaft 14 arranged along an axis X substantially horizontal and orthogonal to the vertical axis Z. The sliding movements back and forth of the piston causes a rotational movement of the crankshaft. Piston displacement displacements are however not performed regularly and produce acyclisms which affect transmission elements connected to said engine 10 and particularly to the crankshaft.

De ce fait un volant d'inertie 15 est connecté au vilebrequin entraîné par les pistons pour absorber les irrégularités du couple moteur et de réduire les acyclismes. Le volant d'inertie 15 est agencé de manière connue fixé à l'extrémité d'accouplement 16 du vilebrequin et connecté avec la boite de vitesses. La face du moteur tournée vers le volant d'inertie est dénommée face accouplement 17.As a result, a flywheel 15 is connected to the crankshaft driven by the pistons to absorb the irregularities of the engine torque and to reduce the acyclisms. The flywheel 15 is arranged in known manner fixed to the coupling end 16 of the crankshaft and connected with the gearbox. The face of the engine facing the flywheel is referred to as the coupling face 17.

Une pompe à carburant (non représentée) est associée au moteur 10 pour injecter dans la chambre à combustion du carburant via des injecteurs par exemple. Cette pompe peut être une pompe haute pression comportant une tige tenant à une extrémité libre un galet d'entrainement en appui sur une surface d'entrainement, ladite surface présente des ondulations et est mobile, liée à la rotation du vilebrequin. Cette surface d'entrainement 19 est par exemple une surface périphérique d'une came 20 de forme sensiblement oblongue qui est fixée solidaire en rotation au vilebrequin autour de son axe de rotation qui est orthogonal au plan de la came et confondu avec l'axe du vilebrequin.A fuel pump (not shown) is associated with the engine 10 to inject into the fuel combustion chamber via injectors for example. This pump may be a high pressure pump comprising a rod holding at a free end a drive roller bearing on a drive surface, said surface has corrugations and is movable, related to the rotation of the crankshaft. This driving surface 19 is for example a peripheral surface of a cam 20 of substantially oblong shape which is secured to the crankshaft in rotation about its axis of rotation which is orthogonal to the plane of the cam and coincides with the axis of the cam. crankshaft.

L'invention concerne un agencement de la pompe haute pression d'alimentation de carburant actionnée à l'aide d'une came d'actionnement 20 disposée à l'extrémité d'accouplement du vilebrequin tournée vers une face accouplement 17 du moteur et connectée à un volant d'inertie 15. Dans le reste de la description sans représentation de la pompe à carburant, ladite pompe à carburant est agencée radialement à l'axe de la came et comporte un piston en appui avec la surface périphérique de ladite came.The invention relates to an arrangement of the high pressure fuel supply pump actuated by means of an actuating cam 20 disposed at the coupling end of the crankshaft facing a coupling face 17 of the engine and connected to A flywheel 15. In the rest of the description without representation of the fuel pump, said fuel pump is arranged radially to the axis of the cam and has a piston resting with the peripheral surface of said cam.

Ladite pompe d'alimentation de carburant est agencée selon l'invention de manière orthogonale à l'axe X du vilebrequin et à l'extrémité d'accouplement 17' dudit vilebrequin 14.Said fuel supply pump is arranged according to the invention orthogonally to the axis X of the crankshaft and to the coupling end 17 'of said crankshaft 14.

Selon l'invention, le volant d'inertie 15 porte la came d'actionnement 20, ladite came est disposée en regard avec le vilebrequin c'est-à-dire que ladite came est montée fixée solidaire avec le volant d'inertie en rotation et en translation, du côté dudit volant tourné vers le vilebrequin 14.According to the invention, the flywheel 15 carries the actuating cam 20, said cam is arranged opposite the crankshaft, that is to say that said cam is fixed mounted integral with the rotating flywheel and in translation, on the side of said steering wheel turned towards the crankshaft 14.

Les figures 2 à 5 représentent des modes de réalisation de l'invention. On peut voir la came d'actionnement 20 de forme sensiblement tubulaire et présentant une section transversale sensiblement oblongue. La forme de ladite section transversale peut cependant être différente.The Figures 2 to 5 represent embodiments of the invention. The actuating cam 20 is substantially tubular in shape and has a substantially oblong cross-section. The shape of said cross section may however be different.

La came d'actionnement 20 comporte un orifice longitudinal sensiblement cylindrique 21 coaxial avec l'axe X de la came qui est adapté pour entourer l'extrémité d'accouplement 17' du vilebrequin. Ladite ouverture est prolongée selon l'axe X par un orifice traversant 22 qui permet le passage d'une vis de fixation pour solidariser le volant d'inertie 15 avec le vilebrequin 14.The actuating cam 20 comprises a substantially cylindrical longitudinal orifice 21 coaxial with the axis X of the cam which is adapted to surround the coupling end 17 'of the crankshaft. Said opening is extended along the X axis by a through orifice 22 which allows the passage of a fastening screw for securing the flywheel 15 with the crankshaft 14.

Ladite came 20 est fixée solidaire du volant d'inertie 15. Pour ce faire, ladite came comporte des orifices filetés obtenus par exemple par perçage parallèlement à l'axe X de came. Le volant comporte également des orifices traversant en vis-à-vis avec les orifices filetés de la came pour permettre une fixation de la came avec le volant grâce à des vis de fixation.Said cam 20 is secured to the flywheel 15. To do this, said cam comprises threaded orifices obtained for example by drilling parallel to the axis X of cam. The steering wheel also has orifices passing through vis-à-vis the threaded holes of the cam to allow attachment of the cam with the steering wheel by means of fixing screws.

Le volant d'inertie 15 est fixé de façon connue à l'extrémité d'accouplement 17' du vilebrequin de telle façon que la came 20 soit tournée vers le vilebrequin 14. La rotation du vilebrequin 14 entraine alors la rotation de la came 20 qui est apte à actionner le piston de la pompe à carburant.The flywheel 15 is fixed in known manner to the coupling end 17 'of the crankshaft so that the cam 20 is turned towards the crankshaft 14. The rotation of the crankshaft 14 then causes the rotation of the cam 20 which is able to actuate the piston of the fuel pump.

Selon ce mode de réalisation, le carter-cylindres 11 comprend une paroi 23 délimitant une chambre d'accueil 24 pour loger la came d'actionnement ; ladite paroi prolonge le carter cylindre selon l'axe longitudinal X et elle comprend une ouverture radiale traversant (non représentée) selon un axe radial orthogonal à l'axe longitudinal X pour le passage du corps sensiblement cylindrique de la pompe à carburant. Ladite chambre d'accueil 24 est fermée de façon étanche grâce à des joints d'étanchéité 25. Lesdits joints d'étanchéités sont agencés des deux côtés selon l'axe longitudinal X de la came d'actionnement.According to this embodiment, the cylinder block 11 comprises a wall 23 defining a reception chamber 24 for housing the actuating cam; said wall extends the cylinder housing along the longitudinal axis X and comprises a radial through opening (not shown) along a radial axis orthogonal to the longitudinal axis X for the passage of the substantially cylindrical body of the fuel pump. Said reception room 24 is sealed by seals 25. Said seals are arranged on both sides along the longitudinal axis X of the actuating cam.

Le volant d'inertie 15 est monté fixé solidaire de l'extrémité d'accouplement 17' du vilebrequin 14. Selon les figures 2 et 3, l'orifice longitudinal 21 de la came 20 entoure l'extrémité d'accouplement 17' du vilebrequin 14 au jeu de montage près. La came est fixée par des liaisons filetées au volant d'inertie 14 ou à un disque formant ledit volant. La came est montée logée dans la chambre d'accueil 24. La pompe à carburant peut être fixée à la paroi 23 du carter-cylindres de manière à ce que son axe soit sensiblement orthogonal à l'axe X du vilebrequin 14, le corps de la pompe traverse l'ouverture radiale pratiquée dans la paroi 23 de la chambre d'accueil 24.The flywheel 15 is mounted fixed secured to the coupling end 17 'of the crankshaft 14. According to the Figures 2 and 3 , the longitudinal orifice 21 of the cam 20 surrounds the coupling end 17 'of the crankshaft 14 to the mounting set near. The cam is fixed by threaded connections to the flywheel 14 or to a disc forming said flywheel. The cam is mounted housed in the reception chamber 24. The fuel pump can be fixed to the wall 23 of the crankcase so that its axis is substantially orthogonal to the axis X of the crankshaft 14, the body of the pump passes through the radial opening in the wall 23 of the reception chamber 24.

La chambre d'accueil 24 est délimitée par des joints d'étanchéité. Un premier joint 26 est disposé au niveau d'un palier de maintien 27 du vilebrequin et un second joint 28 sensiblement annulaire est agencé entre la paroi 23 du carter et la came de préférence à une extrémité longitudinale de la came en contact avec le volant d'inertie. Un conduit d'amenée (non représenté) de liquide de lubrification peut être creusé dans la paroi 23 du carter pour amener du liquide de lubrification vers la surface de contact de la came avec le piston de la pompe à carburant.The reception chamber 24 is delimited by seals. A first seal 26 is disposed at a holding bearing 27 of the crankshaft and a second substantially annular seal 28 is arranged between the wall 23 of the housing and the cam preferably at a longitudinal end of the cam in contact with the steering wheel. 'inertia. A supply duct (not shown) for lubricating liquid may be dug into the casing wall 23 to supply lubricating liquid to the contact surface of the cam with the fuel pump piston.

Selon les figures 5 et 6, le volant d'inertie comporte une protubérance tubulaire 29 qui est montée entourant l'extrémité d'accouplement 17' du vilebrequin. Ladite protubérance 29 présente un évidement 30 sensiblement cylindrique complémentaire à l'extrémité d'accouplement 17' du vilebrequin au jeu de montage près. La protubérance porte la came d'actionnement 20 montée de telle façon que son axe de rotation soit confondu avec l'axe du volant. La came est montée de manière préférentielle par frettage ou par soudure entourant la protubérance tubulaire 29.According to figures 5 and 6, the flywheel has a tubular protrusion 29 which is mounted surrounding the coupling end 17 'of the crankshaft. Said protrusion 29 has a substantially cylindrical recess 30 complementary to the coupling end 17 'of the crankshaft assembly play near. The protrusion carries the actuating cam 20 mounted so that its axis of rotation coincides with the axis of the steering wheel. The cam is preferably mounted by shrinking or welding surrounding the tubular protuberance 29.

La came d'actionnement 20 et la protubérance tubulaire 29 sont tournées vers le vilebrequin 14 de telle façon que l'extrémité d'accouplement 17' du vilebrequin soit enfoncée dans l'évidement 30 de ladite protubérance 29, la came 20 entoure alors ladite extrémité d'accouplement 17' du vilebrequin. Le volant d'inertie 15 est fixé à l'extrémité du vilebrequin grâce à la liaison filetée.The actuating cam 20 and the tubular protrusion 29 are turned towards the crankshaft 14 so that the coupling end 17 'of the crankshaft is driven into the recess 30 of said protuberance 29, the cam 20 then surrounds said coupling end 17 'of the crankshaft. The flywheel 15 is fixed to the end of the crankshaft through the threaded connection.

Comme le mode de réalisation précédent, un premier joint 26 est disposé au niveau d'un palier de maintien 27 du vilebrequin et un second joint 28 sensiblement annulaire est agencé entre la paroi 23 du carter et une extrémité longitudinale de la came 20 en contact avec le volant d'inertie ou entre la paroi 23 et une extrémité longitudinale de la protubérance tubulaire à proximité d'un disque formant le volant d'inertie.As the previous embodiment, a first seal 26 is disposed at a bearing support 27 of the crankshaft and a second substantially annular seal 28 is arranged between the wall 23 of the housing and a longitudinal end of the cam 20 in contact with the crankcase. the flywheel or between the wall 23 and a longitudinal end of the tubular protuberance near a disk forming the flywheel.

Selon un autre mode de réalisation selon la figure 6, la came d'actionnement 20 portée par la protubérance tubulaire 29 du volant d'inertie est logée directement dans une chambre de bielles 34 dans laquelle sont logés également au moins un maneton 31 et au moins un tourillon 32 formant le vilebrequin19. Le palier de maintien 27 du vilebrequin entoure dans ce cas la protubérance tubulaire 29 du volant d'inertie 15. La came d'actionnement 20 logée dans la chambre de bielles 34 bénéficie alors d'un brouillard d'huile envahissant ladite chambre de bielles lors du fonctionnement du moteur ce qui peut permettre d'éviter la création d'un conduit d'amenée de liquide de lubrification vers la surface de contact de la came d'actionnement 20 avec le piston de la pompe à carburant.According to another embodiment according to FIG. 6, the actuating cam 20 carried by the tubular protuberance 29 of the flywheel is housed directly in a chamber of connecting rods 34 in which at least one crank pin 31 is also housed, and at least one a journal 32 forming the crankshaft. The support bearing 27 of the crankshaft surrounds in this case the tubular protuberance 29 of the flywheel 15. The actuating cam 20 housed in the connecting rod chamber 34 then has an oil mist invading said connecting rod chamber when the operation of the engine which can avoid the creation of a supply line of lubricating liquid to the contact surface of the actuating cam 20 with the piston of the fuel pump.

L'objet de l'invention est atteint : l'agencement de pompe à carburant selon l'invention est peu impactant en encombrement du moteur thermique.The object of the invention is achieved: the fuel pump arrangement according to the invention has little impact in space of the engine.

Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de cette prise, décrites ci-dessus à titre d'exemples, elle en embrasse au contraire toutes les variantes. C'est ainsi notamment que la came d'actionnement peut être intégrée au volant d'inertie ou partie dudit volant, sans que l'on sorte pour autant du cadre de l'invention.As goes without saying, the invention is not limited to the embodiments of this plug, described above as examples, it encompasses all variants. Thus, in particular, the actuating cam can be integrated in the flywheel or part of said flywheel, without departing from the scope of the invention.

Claims (11)

Agencement d'une came d'actionnement d'une pompe à carburant à une extrémité d'accouplement (17') du vilebrequin (12) tournée vers le volant d'inertie d'un moteur qui comprend - un carter-cylindres (10) comportant une chambre (11) de bielles délimitée par une paroi (15) présentant un orifice (16) entourant l'extrémité (17') d'un vilebrequin (12) logé dans ladite chambre, - et le volant d'inertie (20) fixé solidaire en rotation à ladite extrémité et disposé à l'extérieur de ladite chambre, ledit volant d'inertie (20) comportant une protubérance tubulaire (22) apte à entourer l'extrémité (17') du vilebrequin, ladite protubérance (22) du volant débouchant à l'intérieur de la chambre (11) par l'orifice circulaire (16), caractérisé en ce que la came d'actionnement est fixée au volant d'inertie.Arrangement of an actuating cam of a fuel pump at a coupling end (17 ') of the crankshaft (12) facing the flywheel of an engine which comprises - a crankcase (10) having a chamber (11) connecting rods defined by a wall (15) having an orifice (16) surrounding the end (17 ') of a crankshaft (12) housed in said chamber, - And the flywheel (20) secured to rotate at said end and disposed outside said chamber, said flywheel (20) having a tubular protrusion (22) adapted to surround the end (17). ') of the crankshaft, said protuberance (22) of the flywheel opening into the chamber (11) through the circular orifice (16), characterized in that the actuating cam is attached to the flywheel. Agencement selon la revendication 1, caractérisé en ce la came est montée entourant l'extrémité du vilebrequin.Arrangement according to claim 1, characterized in that the cam is mounted around the end of the crankshaft. Agencement selon la revendication 1 ou 2, caractérisé en ce que la protubérance tubulaire porte la came d'actionnement.Arrangement according to claim 1 or 2, characterized in that the tubular protuberance carries the actuating cam. Agencement selon la revendication 3, caractérisé en ce que la came est montée entourant la protubérance par frettage ou soudureArrangement according to claim 3, characterized in that the cam is mounted around the protrusion by shrinking or welding Agencement d'une came d'actionnement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la came d'actionnement est entourée par la paroi du carter-cylindres.Arrangement of an actuating cam according to one of Claims 1 to 4, characterized in that the actuating cam is surrounded by the wall of the cylinder block. Agencement d'une came d'actionnement selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le carter-cylindres comporte un évidement prolongé radialement à l'axe du vilebrequin par un orifice, pour loger la pompe à carburant.Arrangement of an actuating cam according to any one of claims 1 to 5, characterized in that the crankcase has a recess extended radially to the axis of the crankshaft by an orifice, for housing the fuel pump. Agencement d'une came d'actionnement selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la came est logée dans la chambre de bielles.Arrangement of an actuating cam according to any one of claims 1 to 6, characterized in that the cam is housed in the connecting rod chamber. Agencement d'une came d'actionnement selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le carter cylindres comporte une chambre d'accueil séparée de la chambre de bielles selon l'axe longitudinal du carter-cylindres pour loger la came d'actionnement.Arranging an actuating cam according to any one of claims 1 to 6, characterized in that the cylinder block has a separate collecting chamber to the crank chamber along the longitudinal axis of the cylinder block for accommodating the actuating cam. Agencement d'une came d'actionnement selon la revendication 8, caratérisé en ce que la chambre d'accueil est fermée de façon étanche par des joints annulaires.Arrangement of an actuating cam according to claim 8, characterized in that the reception chamber is sealingly closed by annular seals. Agencement d'une came d'actionnement selon la revendication 9, caractérisé en ce que la came porte un joint d'étanchéité.Arrangement of an actuating cam according to claim 9, characterized in that the cam carries a seal. Moteur thermique de véhicule automobile comprenant une pompe à carburant agencée du côté accouplement actionnée par une came d'actionnement agencée selon l'une quelconque des revendications 1 à 10.Motor vehicle engine comprising a fuel pump arranged on the coupling side actuated by an actuating cam arranged according to any one of claims 1 to 10.
EP18160571.8A 2017-03-13 2018-03-07 Integration of the drive cam of the hp pump on the flywheel Active EP3379066B1 (en)

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FR1752025A FR3063773B1 (en) 2017-03-13 2017-03-13 INTEGRATION OF THE HP PUMP DRIVE CAM ON THE INERTIA FLYWHEEL

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010035287A1 (en) * 2008-09-29 2010-04-01 Tvs Motor Company Limited System for driving a fuel pump
WO2013160106A1 (en) * 2012-04-25 2013-10-31 Delphi Technologies Holding S.A.R.L. Fuel pump assembly
FR2997133A1 (en) * 2012-10-24 2014-04-25 Renault Sa CRANKSHAFT CONNECTION - CARTER-CYLINDERS
GB2540584A (en) * 2015-07-22 2017-01-25 Gm Global Tech Operations Llc Internal combustion engine comprising a fuel unit pump actuated by the crankshaft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010035287A1 (en) * 2008-09-29 2010-04-01 Tvs Motor Company Limited System for driving a fuel pump
WO2013160106A1 (en) * 2012-04-25 2013-10-31 Delphi Technologies Holding S.A.R.L. Fuel pump assembly
FR2997133A1 (en) * 2012-10-24 2014-04-25 Renault Sa CRANKSHAFT CONNECTION - CARTER-CYLINDERS
GB2540584A (en) * 2015-07-22 2017-01-25 Gm Global Tech Operations Llc Internal combustion engine comprising a fuel unit pump actuated by the crankshaft

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FR3063773A1 (en) 2018-09-14
EP3379066B1 (en) 2021-01-13

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