EP3610150A1 - Oil circuit with oil nozzle and passage - Google Patents

Oil circuit with oil nozzle and passage

Info

Publication number
EP3610150A1
EP3610150A1 EP18722095.9A EP18722095A EP3610150A1 EP 3610150 A1 EP3610150 A1 EP 3610150A1 EP 18722095 A EP18722095 A EP 18722095A EP 3610150 A1 EP3610150 A1 EP 3610150A1
Authority
EP
European Patent Office
Prior art keywords
lubrication
duct
engine according
engine
oil
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
EP18722095.9A
Other languages
German (de)
French (fr)
Other versions
EP3610150B1 (en
Inventor
Jean-Pierre Millon
Ludovic TESSIER
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.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Publication of EP3610150A1 publication Critical patent/EP3610150A1/en
Application granted granted Critical
Publication of EP3610150B1 publication Critical patent/EP3610150B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F01M2011/021—Arrangements of lubricant conduits for lubricating auxiliaries, e.g. pumps or turbo chargers
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives

Definitions

  • the present invention relates to the field of motor vehicles and relates to a high pressure fuel supply pump.
  • the invention relates to a high-pressure fuel injection pump, particularly a diesel fuel pump, for a motor vehicle engine, comprising a pusher including a pusher body, a fixed axis of rotation relative to the pusher body, a roller mounted at rotation relative to the pusher body around the fixed axis of rotation and a bearing disposed between the axis of rotation and the roller, the roller being adapted to cooperate with a cam integral with a crankshaft of the engine.
  • the invention relates more particularly to lubrication of the contact of the roller of the high-pressure pump with a cam integral in rotation with a crankshaft movable in rotation inside an inner chamber of a motor vehicle engine.
  • the invention also relates to an oil circuit of an internal combustion engine of a motor vehicle comprising a high-pressure fuel pump arranged near the coupling face of a crankcase of a heat engine.
  • 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.
  • the high-pressure fuel pump is conventionally a plateau pump which comprises an input shaft rotating a plate which is inclined with respect to the axis and which is likely to solicit axial pistons movably mounted in chambers in which is admitted and ejected the fuel.
  • 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 shaft movable in rotation about an axis parallel to the axis of the crankshaft, said shaft is rotated by the crankshaft by means of 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 or through a cam attached to the crankshaft and sharing the same axis of rotation.
  • the high pressure pump can also be actuated by a cam fixed directly to the crankshaft and sharing the same axis of rotation. It is known from the state of the art and in particular from the publication
  • FR301 1588-A1 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 the engine with fuel. Said cam is disposed between two arms of said crankshaft.
  • a disadvantage of this type of arrangement is an increase in the overall size of the engine, particularly in the longitudinal direction of the engine, which does not comply with the restrictions on the dimensions of the engine space in the vehicles.
  • a high pressure pump arrangement at one end is also known.
  • longitudinal motor facing the coupling side; the actuating cam is then secured to one end of the crankshaft near a flywheel.
  • the rotational speed of the roller is important due to the diameter of the cam which is implanted on the crankshaft. It is necessary to provide effective lubrication of the movable elements constituting the high pressure pump.
  • a current lubrication solution consists of lubricating by means of nozzles formed in the pusher body and injecting oil at their outlet on the sidewalls of the bearing, which makes it impossible to ensure good homogeneity and good oil flow. in the landing.
  • a known solution of such a feed consists of a circulation of oil outside the support of the fuel injection pump and specifically dedicated to the lubricant supply function of the injection pump. This is a complex, expensive solution that induces high pressure losses for the lubricant.
  • the object of the invention is to remedy these problems and one of the objects of the invention is a lubrication circuit of the actuating cam of a high pressure fuel supply pump arranged at one end of the crankshaft.
  • the object of the invention relates to a lubrication circuit of a high-pressure fuel pump arranged at one end of the engine facing the coupling face, comprising a lubrication duct dug in a wall of the engine. motor, said conduit being simple to obtain and with a reduction in manufacturing costs.
  • the object of the invention relates more particularly to a lubricating circuit of a motor vehicle engine engine arranged at a longitudinal end of the engine facing the coupling face of the engine, comprising: - an oil supply duct a cylinder head, hollowed out in a crankcase, a lubrication duct of a high pressure pump actuated by a fixed cam secured to a crankshaft of the engine, a longitudinal main orthogonal oil supply ramp connected with each of the two ducts, characterized in that the supply duct extends substantially parallel to the coupling face in the extension of the lubrication duct at one end of which is disposed an oil flow reduction nozzle.
  • the supply duct extends in the extension of the lubrication duct, which can reduce the number of manufacturing operations and in particular the drilling of ducts in the wall of the crankcase of the engine.
  • the ducts extend substantially parallel to the coupling face of the engine and in particular the cylinder block facilitating the drilling operation.
  • the nozzle allows a reduction of the oil flow towards the high pressure pump.
  • the supply duct and the lubrication duct are cylindrical and have an identical internal diameter.
  • the two ducts are easy to obtain and in particular using the same tools.
  • the supply duct and the lubrication duct are coaxial.
  • the supply duct and the lubrication duct come from the same operation, in particular drilling with the same tools.
  • the nozzle is formed by an annular ring having radial orifices of different diameters, coaxial with the main ramp and inserted inside said ramp to cover the outlets of each of the two ducts having a radial orifice in front of each of the outlets supply and lubrication ducts.
  • the nozzle is formed by the insertion of an annular ring in the end of the main ramp, said ring having radial orifices of different diameters and being coaxial with the main ramp.
  • Said ring covers the outlets of each of the outlets of the two ducts in the main ramp, so as to have a radial orifice in front of each outlets.
  • the different diameters of the radial orifices of the ring therefore make it possible to obtain a different oil flow rate in the supply duct to the cylinder head, in particular a larger one, from the flow rate in the lubrication duct towards the high-pressure pump.
  • the section of the radial orifice vis-à-vis the outlet of the lubrication duct is less than the cross section of the radial orifice vis-à-vis the outlet of the supply duct in the main ramp.
  • the ring is part of a blanking plug at one end of the main ramp leading to the coupling face of the engine.
  • the ring is part of a closure cap of the end of the main ramp coupling side, which on the one hand reduces the references of the parts to be mounted and secondly a simple axial positioning of the ring.
  • the closure cap comprises an indexing means.
  • the cap comprises an indexing means capable of ensuring precise angular positioning of the ring part of the plug.
  • the indexing means comprises a radial notch extending from a peripheral wall of the plug and received in a notch cut in a wall of the engine.
  • the plug has a radial notch extending radially from a peripheral wall of the plug, said notch is received in a notch cut in the wall of the engine and in particular the cylinder block which allows precise angular positioning of the ring by relative to the crankcase wall.
  • the plug is mounted at the coupling end of the main ramp by hooping.
  • the plug is mounted at the coupling end of the main ramp by hooping, by positioning the notch of the plug in front of the notch cut in the wall of the crankcase, the operation being simple execution.
  • FIG. 1 is a schematic view of a crankcase of the engine with the coupling face.
  • FIG. 2 is a schematic view from below of a crankcase of the engine with the coupling face.
  • FIG. 3 is a diagrammatic longitudinal section view of an end of the motor on the motor coupling side with an arrangement of a high pressure pump.
  • - Figure 4 is a schematic longitudinal sectional view of an engine end motor coupling side with an arrangement of a high pressure pump.
  • FIG. 5 is a schematic view of the cap according to the invention at a first angle.
  • FIG. 6 is a view of the plug under another angle.
  • 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 which opens a first accessory end of the crankshaft around which is mounted at least one wheel (not shown) to rotate 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).
  • an engine or internal combustion engine of a motor vehicle comprises a crankcase 10 comprising at least one cylinder 1 1 in which a piston (not shown) is able to slide in a movement of back and forth along the vertical axis Z of said cylinder and a cylinder head (not shown) covering the upper part of the crankcase facing a motor bonnet of the vehicle.
  • the movements of the piston are caused by a variation in volume of a combustion chamber delimited by the wall of at least one cylinder, said piston and the cylinder head.
  • the piston is connected to a crankshaft (not shown) arranged along a longitudinal axis X of the motor substantially horizontal and orthogonal to the vertical axis Z.
  • a high-pressure pump 12 is associated with the engine to inject fuel into the combustion chamber via injectors, for example. It is arranged on the coupling side side 100 of the crankcase 10 to reduce the size of the engine.
  • Said pump comprises a substantially cylindrical body 14 fixed in a direction inclined relative to, for example, the vertical axis Z and having an actuating end 15 opening into an actuating chamber 18 delimited by the wall of the crankcase.
  • the high-pressure pump comprises a pusher having at this actuating end a driving roller 13 and at the opposite end 17, in the direction in which the translational movement of the pusher travels back and forth, elements dedicated to the pressurizing the fuel.
  • the drive roller 13 rolls bearing on a drive surface, said surface has corrugations and is movable, related to the rotation of the crankshaft.
  • This driving surface is for example a peripheral surface of a cam (not shown) of substantially oblong shape which is fixed to rotate with the crankshaft about its axis of rotation which is orthogonal to the plane of the cam and coincides with the crankshaft axis.
  • the speed of rotation of the drive roller 13 is important and it is necessary to provide effective lubrication of the bearing disposed between the roller and its mounting axis relative to the pusher body.
  • the high pressure pump 12 must comprise lubrication elements ensuring effective lubrication of the sliding contact between the guide housing and the pusher body and the mechanical contact between the cam and the roller 13.
  • the invention relates to an arrangement of the high pressure fuel supply pump actuated by means of an actuating cam disposed at the coupling end of the crankshaft facing towards the face.
  • coupling 100 of the engine and more particularly the lubrication circuit 50 of the engine comprising the lubrication for said pump.
  • the lubrication circuit 50 circulates lubricating liquid which may be oil from a main oil supply manifold.
  • the main oil ramp 20 must allow lubrication of the rotating elements disposed in the cylinder head such as camshaft bearings or actuating pawls.
  • a feed duct 21 is thus formed in the crankcase having an outlet 22 of a first side in the main ramp 20 and a second outlet on the opposite side of the upper face 23 of the crankcase vis-à-vis with the bolt as shown in Figures 3 and 4.
  • the supply duct comprises an axis substantially parallel to the vertical axis Z. Said supply duct 21 thus extends substantially parallel to the coupling face 100 in a vertical direction. It should be noted that for some engines to avoid certain pipes, for example, the supply duct may be inclined relative to the vertical axis Z or not extend parallel to the coupling face 100 without this affecting the scope of the invention.
  • the supply duct 21 is preferably obtained by drilling in the crankcase 10. On the other hand, the main ramp 20 must allow the oil to be conveyed to the high-pressure pump 12.
  • lubrication 25 is made in the cylinder block along the vertical axis Z presenting a first outlet 26 in the main ramp and a second opening on the opposite side in the actuating chamber 18 substantially facing the drive roller 13.
  • the axis of the lubrication duct 25 is therefore substantially inclined with respect to the high pressure pump shaft 12.
  • the lubrication duct 25 is in the extension of the supply duct 21. More particularly, the two lubrication and supply ducts 21 are coaxial and obtained by the same drilling operation; they therefore have an identical inner diameter.
  • the lubrication duct therefore comprises a nozzle 30 to reduce the oil flow.
  • the nozzle 30 is formed by a narrow orifice 28 of reduced cross section radially through an annular ring 27. Said annular ring is inserted into the main ramp 20 and is coaxial with said ramp.
  • the outer diameter of the annular ring 27 is slightly greater than the inner diameter of the main ramp to allow mounting by hooping.
  • the annular ring 27 thus has a wide orifice 29 and the narrow orifice 28 substantially radially through the annular ring.
  • the wide orifice 29 is arranged surrounding the outlet 22 of the supply duct 21 and the diameter of the wide orifice is preferably greater than the diameter of the supply duct 21 so as not to cause pressure losses in the flow. oil in the direction of the cylinder head.
  • the narrow orifice 28 is arranged facing the outlet 26 of the lubrication duct 25 in the main ramp 20 and therefore has a different diameter and more particularly much smaller than the diameter of the lubrication duct 25 and the wide orifice 29. Oil can be drained down and the cylinder head without disrupting the flow of oil for the lubrication of the cylinder head.
  • the annular ring 27 is part of a closure cap 31 of the main ramp.
  • the closure cap 31 thus comprises a substantially cylindrical plate 32 extended axially by the annular ring 27.
  • a radial notch 34 extends from the peripheral wall 33 of the cylindrical plate 32 to be received on assembly in a complementary notch cut in the wall of the crankcase.
  • the combination of the notch and the notch forms a poka-yoke and allows a mounting reliability of the assembly and more particularly of the arrangement of the annular ring 27 to present the wide orifice 29 in front of the outlet 22 of the duct supply and the narrow orifice 28 opposite the outlet 26 of the lubrication duct.
  • the closure cap 31 is presented with the annular ring facing the outlet of the main ramp 20 by making the combination of the notch 34 with the notch 35.
  • the stopper is then pressed into the main ramp up to reaching a stop to ensure optimal axial positioning of the annular ring.
  • the annular ring has the wide orifice surrounding the outlet 22 of the supply duct and the narrow orifice vis-a-vis with the outlet 26 of the lubrication duct.
  • the oil flow rates in each of the two ducts are therefore controlled.
  • the lubrication circuit comprises a branch directed towards the cylinder head and another branch to the high pressure pump, the two branches are formed by ducts obtained by the same drilling operation through the main ramp and the oil flow rates in each of the branches is regulated by means of a simple annular ring part of a closure cap of the main ramp 20.
  • the plug may have an axially extending blade to limit the section of the outlet 26 of the lubrication duct 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

A lubrication circuit for a combustion engine of a motor vehicle positioned at a longitudinal end of the engine turned toward the coupling face (100) of the engine, comprising: - a supply duct (21) for oil to a cylinder head, recessed in a cylinder casing, - a high-pressure pump (20) lubrication duct (25) activated by a cam solidly attached to an engine crankshaft, - an orthogonal longitudinal main oil supply ramp (20) connected to both ducts, characterized in that the supply duct (21) extends substantially parallel to the coupling face (100) in the extension of the lubrication duct (25) at one end of which an oil flow reduction nozzle (30) is arranged.

Description

CIRCUIT D'HUILE AVEC PASSAGE ET AJUTAGE D'HUILE  OIL CIRCUIT WITH PASSAGE AND OIL ADJUSTMENT
Domaine technique de l'invention Technical field of the invention
La présente invention se rapporte au domaine des véhicules automobiles et concerne une pompe haute pression d'alimentation en carburant. L'invention concerne une pompe d'injection de carburant à haute pression, notamment de gasoil, pour moteur de véhicule automobile, comprenant un poussoir incluant un corps de poussoir, un axe de rotation fixe par rapport au corps de poussoir, un galet monté à rotation par rapport au corps de poussoir autour de l'axe de rotation fixe et un palier disposé entre l'axe de rotation et le galet, le galet étant apte coopérer avec une came solidaire d'un vilebrequin du moteur. The present invention relates to the field of motor vehicles and relates to a high pressure fuel supply pump. The invention relates to a high-pressure fuel injection pump, particularly a diesel fuel pump, for a motor vehicle engine, comprising a pusher including a pusher body, a fixed axis of rotation relative to the pusher body, a roller mounted at rotation relative to the pusher body around the fixed axis of rotation and a bearing disposed between the axis of rotation and the roller, the roller being adapted to cooperate with a cam integral with a crankshaft of the engine.
L'invention concerne plus particulièrement une lubrification du contact du galet de la pompe haute pression avec une came 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 relates more particularly to lubrication of the contact of the roller of the high-pressure pump with a cam integral in rotation with a crankshaft movable in rotation inside an inner chamber of a motor vehicle engine.
L'invention concerne également un circuit d'huile d'un moteur à combustion interne de véhicule automobile comportant une pompe haute pression de carburant agencée à proximité de la face d'accouplement d'un carter- cylindres d'un moteur thermique. Etat de la technique The invention also relates to an oil circuit of an internal combustion engine of a motor vehicle comprising a high-pressure fuel pump arranged near the coupling face of a crankcase of a heat engine. State 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.
La pompe haute pression de carburant 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 high-pressure fuel pump is conventionally a plateau pump which comprises an input shaft rotating a plate which is inclined with respect to the axis and which is likely to solicit axial pistons movably mounted in chambers in which is admitted and ejected the fuel.
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. 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.
Selon un autre agencement, 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 entraîné en rotation par le vilebrequin grâce à un dispositif de transmission comprenant des roues d'entraînement sensiblement coplanaires et fixées à l'extrémité du vilebrequin et de l'arbre mobile et une courroie entourant lesdites roues ou grâce à une came fixée au vilebrequin et partageant le même axe de rotation. According to another arrangement, the high pressure pump is actuated by a cam fixed to a shaft movable in rotation about an axis parallel to the axis of the crankshaft, said shaft is rotated by the crankshaft by means of 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 or through a cam attached to the crankshaft and sharing the same axis of rotation.
La pompe haute pression peut également être actionnée par une came fixée directement au vilebrequin et partageant le même axe de rotation. II est connu de l'état de la technique et notamment de la publicationThe high pressure pump can also be actuated by a cam fixed directly to the crankshaft and sharing the same axis of rotation. It is known from the state of the art and in particular from the publication
FR301 1588-A1 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. Un inconvénient de ce type d'agencement est un accroissement de l'encombrement du moteur thermique notamment dans le sens longitudinal du moteur, peu conforme avec les restrictions des dimensions de l'espace du moteur dans les véhicules. FR301 1588-A1 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 the engine with fuel. Said cam is disposed between two arms of said crankshaft. A disadvantage of this type of arrangement is an increase in the overall size of the engine, particularly in the longitudinal direction of the engine, which does not comply with the restrictions on the dimensions of the engine space in the vehicles.
Pour réduire l'encombrement du moteur thermique, on connaît également un agencement de pompe haute pression à une extrémité longitudinale du moteur tournée vers la face accouplement ; la came d'actionnement est alors fixée solidaire d'une extrémité du vilebrequin à proximité d'un volant d'inertie. To reduce the size of the heat engine, a high pressure pump arrangement at one end is also known. longitudinal motor facing the coupling side; the actuating cam is then secured to one end of the crankshaft near a flywheel.
Dans le domaine de telles pompes d'injection de carburant, la vitesse de rotation du galet est importante due au diamètre de la came qui est implantée sur le vilebrequin. Il est nécessaire de prévoir une lubrification efficace des éléments mobiles constituant la pompe haute pression. In the field of such fuel injection pumps, the rotational speed of the roller is important due to the diameter of the cam which is implanted on the crankshaft. It is necessary to provide effective lubrication of the movable elements constituting the high pressure pump.
Une solution actuelle de lubrification consiste à lubrifier au moyen de gicleurs formés dans le corps de poussoir et injectant à leur sortie l'huile sur les flancs du palier, ce qui ne permet pas d'assurer une bonne homogénéité et un bon débit d'huile dans le palier. A current lubrication solution consists of lubricating by means of nozzles formed in the pusher body and injecting oil at their outlet on the sidewalls of the bearing, which makes it impossible to ensure good homogeneity and good oil flow. in the landing.
Il existe aussi une problématique de fournir une bonne alimentation de la pompe haute pression en lubrifiant en termes de pression et de refroidissement, tout en étant simple et économique. Une solution connue d'une telle alimentation consiste en une circulation d'huile à l'extérieur du support de la pompe d'injection de carburant et spécifiquement dédiée à la fonction d'alimentation en lubrifiant de la pompe d'injection. Il s'agit d'une solution complexe, onéreuse et induisant des pertes de charges élevées pour le lubrifiant. Le but de l'invention est de remédier à ces problèmes et un des objets de l'invention est un circuit de lubrification de la came d'actionnement d'une pompe haute pression d'alimentation de carburant agencée à une extrémité du vilebrequin. There is also a problem of providing a good supply of the high pressure pump lubricant in terms of pressure and cooling, while being simple and economical. A known solution of such a feed consists of a circulation of oil outside the support of the fuel injection pump and specifically dedicated to the lubricant supply function of the injection pump. This is a complex, expensive solution that induces high pressure losses for the lubricant. The object of the invention is to remedy these problems and one of the objects of the invention is a lubrication circuit of the actuating cam of a high pressure fuel supply pump arranged at one end of the crankshaft.
Bref résumé de l'invention L'objet de l'invention concerne un circuit de lubrification d'une pompe haute pression de carburant agencée à une extrémité du moteur thermique tournée vers la face d'accouplement comprenant un conduit de lubrification creusé dans une paroi du moteur, ledit conduit étant simple à obtenir et avec une réduction de coûts de fabrication. L'objet de l'invention concerne plus particulièrement un circuit de lubrification d'un moteur thermique de véhicule automobile agencé à une extrémité longitudinale du moteur tournée vers la face d'accouplement du moteur, comportant : - un conduit d'amenée d'huile à une culasse, creusé dans un carter- cylindres, un conduit de lubrification d'une pompe haute pression actionnée par une came fixée solidaire à un vilebrequin du moteur, une rampe principale longitudinale d'alimentation en huile orthogonale connectée avec chacun des deux conduits, caractérisé en ce que le conduit d'amenée s'étend sensiblement parallèle à la face d'accouplement dans le prolongement du conduit de lubrification à une extrémité duquel est disposé un ajutage de réduction de débit d'huile. De manière avantageuse, le conduit d'amenée s'étend dans le prolongement du conduit de lubrification, ce qui peut réduire le nombre d'opération de fabrication et notamment de perçage des conduits dans la paroi du carter-cylindres du moteur. Les conduits s'étendent sensiblement parallèlement à la face d'accouplement du moteur et notamment du carter- cylindres facilitant l'opération de perçage. L'ajutage permet une réduction du débit d'huile en direction de la pompe haute pression. BRIEF SUMMARY OF THE INVENTION The object of the invention relates to a lubrication circuit of a high-pressure fuel pump arranged at one end of the engine facing the coupling face, comprising a lubrication duct dug in a wall of the engine. motor, said conduit being simple to obtain and with a reduction in manufacturing costs. The object of the invention relates more particularly to a lubricating circuit of a motor vehicle engine engine arranged at a longitudinal end of the engine facing the coupling face of the engine, comprising: - an oil supply duct a cylinder head, hollowed out in a crankcase, a lubrication duct of a high pressure pump actuated by a fixed cam secured to a crankshaft of the engine, a longitudinal main orthogonal oil supply ramp connected with each of the two ducts, characterized in that the supply duct extends substantially parallel to the coupling face in the extension of the lubrication duct at one end of which is disposed an oil flow reduction nozzle. Advantageously, the supply duct extends in the extension of the lubrication duct, which can reduce the number of manufacturing operations and in particular the drilling of ducts in the wall of the crankcase of the engine. The ducts extend substantially parallel to the coupling face of the engine and in particular the cylinder block facilitating the drilling operation. The nozzle allows a reduction of the oil flow towards the high pressure pump.
Selon d'autres caractéristiques de l'invention : According to other features of the invention:
- le conduit d'amenée et le conduit de lubrification sont cylindriques et présentent un diamètre intérieur identique. De manière avantageuse, les deux conduits sont faciles à obtenir et notamment en utilisant les mêmes outils. the supply duct and the lubrication duct are cylindrical and have an identical internal diameter. Advantageously, the two ducts are easy to obtain and in particular using the same tools.
- le conduit d'amenée et le conduit de lubrification sont coaxiaux. De manière avantageuse, le conduit d'amenée et le conduit de lubrification sont issus d'une même opération notamment de perçage avec les mêmes outils. the supply duct and the lubrication duct are coaxial. Advantageously, the supply duct and the lubrication duct come from the same operation, in particular drilling with the same tools.
- l'ajutage est formé par une bague annulaire comportant des orifices radiaux de diamètres différents, coaxiale avec la rampe principale et insérée à l'intérieur de ladite rampe pour recouvrir les débouchés de chacun des deux conduits en présentant un orifice radial devant chacun des débouchés de conduits d'amenée et de lubrification. - The nozzle is formed by an annular ring having radial orifices of different diameters, coaxial with the main ramp and inserted inside said ramp to cover the outlets of each of the two ducts having a radial orifice in front of each of the outlets supply and lubrication ducts.
De manière avantageuse, l'ajutage est formé par l'insertion d'une bague annulaire dans l'extrémité de la rampe principale, ladite bague comportant des orifices radiaux de diamètres différents et étant coaxiale avec la rampe principale. Ladite bague vient recouvrir les débouchés de chacun des débouchés des deux conduits dans la rampe principale, de façon à présenter un orifice radial devant chacun des débouchés. Les diamètres différents des orifices radiaux de la bague permettent donc d'obtenir un débit d'huile différent dans le conduit d'amenée vers la culasse, notamment plus fort, du débit dans le conduit de lubrification en direction de la pompe haute pression. Advantageously, the nozzle is formed by the insertion of an annular ring in the end of the main ramp, said ring having radial orifices of different diameters and being coaxial with the main ramp. Said ring covers the outlets of each of the outlets of the two ducts in the main ramp, so as to have a radial orifice in front of each outlets. The different diameters of the radial orifices of the ring therefore make it possible to obtain a different oil flow rate in the supply duct to the cylinder head, in particular a larger one, from the flow rate in the lubrication duct towards the high-pressure pump.
- la section de l'orifice radial en vis-à-vis du débouché du conduit de lubrification est inférieure à la section de l'orifice radial en vis-à-vis du débouché du conduit d'amenée dans la rampe principale. - The section of the radial orifice vis-à-vis the outlet of the lubrication duct is less than the cross section of the radial orifice vis-à-vis the outlet of the supply duct in the main ramp.
De manière avantageuse, il est suffisant de réduire le diamètre de section de l'orifice en vis-à-vis du débouché du conduit de lubrification pour obtenir un débit juste au besoin. Advantageously, it is sufficient to reduce the section diameter of the orifice vis-à-vis the outlet of the lubrication conduit to obtain a flow rate just as needed.
- la bague est partie d'un bouchon d'obturation d'une extrémité de la rampe principale débouchant de la face d'accouplement du moteur. - The ring is part of a blanking plug at one end of the main ramp leading to the coupling face of the engine.
De manière avantageuse, la bague est partie d'un bouchon d'obturation de l'extrémité de la rampe principale côté accouplement, ce qui permet d'une part de réduire les références des pièces à monter et d'autre part un positionnement axial simple de la bague. - le bouchon d'obturation comporte un moyen d'indexation. De manière avantageuse, le bouchon comporte un moyen d'indexation apte à assurer un positionnement angulaire précis de la bague partie du bouchon. Advantageously, the ring is part of a closure cap of the end of the main ramp coupling side, which on the one hand reduces the references of the parts to be mounted and secondly a simple axial positioning of the ring. - The closure cap comprises an indexing means. Advantageously, the cap comprises an indexing means capable of ensuring precise angular positioning of the ring part of the plug.
- le moyen d'indexation comprend une encoche radiale s'étendant depuis une paroi périphérique du bouchon et reçue dans une entaille creusée dans une paroi du moteur. - The indexing means comprises a radial notch extending from a peripheral wall of the plug and received in a notch cut in a wall of the engine.
De manière avantageuse, le bouchon comporte une encoche radiale s'étendant radialement depuis une paroi périphérique du bouchon, ladite encoche est reçue dans une entaille creusée dans la paroi du moteur et notamment du carter cylindres ce qui permet un positionnement angulaire précis de la bague par rapport à la paroi du carter-cylindres. Advantageously, the plug has a radial notch extending radially from a peripheral wall of the plug, said notch is received in a notch cut in the wall of the engine and in particular the cylinder block which allows precise angular positioning of the ring by relative to the crankcase wall.
- le bouchon est monté à l'extrémité d'accouplement de la rampe principale par frettage. - The plug is mounted at the coupling end of the main ramp by hooping.
De manière avantageuse, le bouchon est monté à l'extrémité d'accouplement de la rampe principale par frettage, en positionnant au préalable l'encoche du bouchon en regard de l'entaille creusée dans la paroi du carter- cylindres, l'opération étant simple d'exécution. Advantageously, the plug is mounted at the coupling end of the main ramp by hooping, by positioning the notch of the plug in front of the notch cut in the wall of the crankcase, the operation being simple execution.
Brève description des figures Brief 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 : 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:
- la figure 1 est une vue schématique d'un carter-cylindres du moteur avec la face accouplement. - Figure 1 is a schematic view of a crankcase of the engine with the coupling face.
- la figure 2 est une vue schématique de dessous d'un carter-cylindres du moteur avec la face accouplement. -la figure 3 est une vue schématique de coupe longitudinale d'une extrémité du moteur côté accouplement du moteur avec un agencement d'une pompe haute pression. - la figure 4 est une vue schématique de coupe longitudinale d'une extrémité du moteur côté accouplement du moteur avec un agencement d'une pompe haute pression. - Figure 2 is a schematic view from below of a crankcase of the engine with the coupling face. FIG. 3 is a diagrammatic longitudinal section view of an end of the motor on the motor coupling side with an arrangement of a high pressure pump. - Figure 4 is a schematic longitudinal sectional view of an engine end motor coupling side with an arrangement of a high pressure pump.
- la figure 5 est une vue schématique du bouchon selon l'invention sous un premier angle. - Figure 5 is a schematic view of the cap according to the invention at a first angle.
- la figure 6 est une vue du bouchon sous un autre angle. - Figure 6 is a view of the plug under another angle.
Description détaillée des figures Detailed description of the figures
Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires. La description qui suit peut prendre en compte l'axe longitudinal X du moteur et l'axe vertical Z orthogonal dirigée vers le haut du véhicule. In the following description, like reference numerals designate like parts or having similar functions. The following description may take into account the longitudinal axis X of the motor and the orthogonal vertical axis Z directed towards the top of the vehicle.
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. 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 entraîner 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). 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. In the following description, there is an accessory side of the engine which opens a first accessory end of the crankshaft around which is mounted at least one wheel (not shown) to rotate 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 les figures 1 et 2, un moteur thermique ou à combustion interne de véhicule automobile comprend un carter-cylindres 10 comportant au moins un cylindre 1 1 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 entraînés par une variation en volume d'une chambre à combustion délimitée par la paroi du au-moins un cylindre, ledit piston et la culasse. Le piston est lié à un vilebrequin (non représenté) agencé selon un axe longitudinal X du moteur sensiblement horizontal et orthogonal à l'axe vertical Z. Les mouvements de coulissement en va-et-vient du piston entraînent un mouvement en rotation du vilebrequin. Une pompe haute pression 12 est associée au moteur pour injecter dans la chambre à combustion du carburant via des injecteurs par exemple. Elle est agencée du côté face accouplement 100 du carter-cylindres 10 pour réduire l'encombrement du moteur. Ladite pompe comporte un corps sensiblement cylindrique 14 fixé selon une direction inclinée par rapport par exemple à l'axe vertical Z et comportant une extrémité d'actionnement 15 débouchant dans une chambre d'actionnement 18 délimitée par la paroi du carter-cylindres. La pompe haute pression comprend un poussoir présentant à cette extrémité d'actionnement un rouleau d'entraînement 13 et à l'extrémité opposée 17, suivant la direction dans laquelle se pratique le déplacement de translation aller-retour du poussoir, des éléments dédiés à la mise en pression du carburant. Le rouleau d'entraînement 13 roule en appui sur une surface d'entraînement, ladite surface présente des ondulations et est mobile, liée à la rotation du vilebrequin. Cette surface d'entraînement est par exemple une surface périphérique d'une came (non représentée) 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. In a known manner, according to FIGS. 1 and 2, an engine or internal combustion engine of a motor vehicle comprises a crankcase 10 comprising at least one cylinder 1 1 in which a piston (not shown) is able to slide in a movement of back and forth along the vertical axis Z of said cylinder and a cylinder head (not shown) covering the upper part of the crankcase facing a motor bonnet of the vehicle. The movements of the piston are caused by a variation in volume of a combustion chamber delimited by the wall of at least one cylinder, said piston and the cylinder head. The piston is connected to a crankshaft (not shown) arranged along a longitudinal axis X of the motor substantially horizontal and orthogonal to the vertical axis Z. The sliding movements back and forth of the piston cause a rotational movement of the crankshaft. A high-pressure pump 12 is associated with the engine to inject fuel into the combustion chamber via injectors, for example. It is arranged on the coupling side side 100 of the crankcase 10 to reduce the size of the engine. Said pump comprises a substantially cylindrical body 14 fixed in a direction inclined relative to, for example, the vertical axis Z and having an actuating end 15 opening into an actuating chamber 18 delimited by the wall of the crankcase. The high-pressure pump comprises a pusher having at this actuating end a driving roller 13 and at the opposite end 17, in the direction in which the translational movement of the pusher travels back and forth, elements dedicated to the pressurizing the fuel. The drive roller 13 rolls bearing on a drive surface, said surface has corrugations and is movable, related to the rotation of the crankshaft. This driving surface is for example a peripheral surface of a cam (not shown) of substantially oblong shape which is fixed to rotate with the crankshaft about its axis of rotation which is orthogonal to the plane of the cam and coincides with the crankshaft axis.
La vitesse de rotation du rouleau d'entraînement 13 est importante et il est nécessaire de prévoir une lubrification efficace du palier disposé entre le rouleau et son axe de montage relativement au corps de poussoir. Ainsi, pour son fonctionnement, la pompe haute pression 12 doit comprendre des éléments de lubrification assurant une lubrification efficace du contact glissant entre le carter de guidage et le corps de poussoir et du contact mécanique entre la came et le rouleau 13. The speed of rotation of the drive roller 13 is important and it is necessary to provide effective lubrication of the bearing disposed between the roller and its mounting axis relative to the pusher body. Thus, for its operation, the high pressure pump 12 must comprise lubrication elements ensuring effective lubrication of the sliding contact between the guide housing and the pusher body and the mechanical contact between the cam and the roller 13.
L'invention concerne un agencement de la pompe haute pression d'alimentation de carburant actionnée à l'aide d'une came d'actionnement disposée à l'extrémité d'accouplement du vilebrequin tournée vers la face accouplement 100 du moteur et plus particulièrement le circuit de lubrification 50 du moteur comprenant la lubrification pour ladite pompe. Dans le circuit de lubrification 50 circule du liquide de lubrification qui peut être de l'huile provenant d'une rampe principale 20 d'alimentation en huile. D'une part, la rampe principale 20 d'huile doit permettre la lubrification des éléments tournant disposés dans la culasse tels que des paliers d'arbre à cames ou des linguets d'actionnement. Un conduit d'amenée 21 est ainsi creusé dans le carter-cylindres présentant un débouché 22 d'un premier côté dans la rampe principale 20 et un second débouché du côté opposé de la face supérieure 23 du carter-cylindres en vis-à-vis avec la culasse comme représenté dans les figures 3 et 4. The invention relates to an arrangement of the high pressure fuel supply pump actuated by means of an actuating cam disposed at the coupling end of the crankshaft facing towards the face. coupling 100 of the engine and more particularly the lubrication circuit 50 of the engine comprising the lubrication for said pump. In the lubrication circuit 50 circulates lubricating liquid which may be oil from a main oil supply manifold. On the one hand, the main oil ramp 20 must allow lubrication of the rotating elements disposed in the cylinder head such as camshaft bearings or actuating pawls. A feed duct 21 is thus formed in the crankcase having an outlet 22 of a first side in the main ramp 20 and a second outlet on the opposite side of the upper face 23 of the crankcase vis-à-vis with the bolt as shown in Figures 3 and 4.
De manière préférentielle, le conduit d'amenée comporte un axe sensiblement parallèle à l'axe vertical Z. Ledit conduit d'amenée 21 s'étend ainsi sensiblement parallèlement à la face d'accouplement 100 selon une direction verticale. Il est à noter que pour certains moteurs pour éviter certaines canalisations par exemple, le conduit d'amenée peut être incliné par rapport à l'axe vertical Z ou ne pas s'étendre parallèlement à la face d'accouplement 100 sans que cela impacte sur la portée de l'invention. Le conduit d'amenée 21 est de manière préférentielle obtenu par un perçage dans le carter-cylindres 10. D'autre part, la rampe principale 20 doit permettre d'acheminer de l'huile à destination de la pompe haute pression 12. Un conduit de lubrification 25 est ainsi creusé dans le carter-cylindres selon l'axe vertical Z présentant un premier débouché 26 dans la rampe principale et un second débouché du côté opposé dans la chambre d'actionnement 18 sensiblement en regard avec le rouleau d'entraînement 13 de la pompe haute pression 12. L'axe du conduit de lubrification 25 est donc sensiblement incliné par rapport à l'axe de pompe haute pression 12. Preferably, the supply duct comprises an axis substantially parallel to the vertical axis Z. Said supply duct 21 thus extends substantially parallel to the coupling face 100 in a vertical direction. It should be noted that for some engines to avoid certain pipes, for example, the supply duct may be inclined relative to the vertical axis Z or not extend parallel to the coupling face 100 without this affecting the scope of the invention. The supply duct 21 is preferably obtained by drilling in the crankcase 10. On the other hand, the main ramp 20 must allow the oil to be conveyed to the high-pressure pump 12. A duct In this way, lubrication 25 is made in the cylinder block along the vertical axis Z presenting a first outlet 26 in the main ramp and a second opening on the opposite side in the actuating chamber 18 substantially facing the drive roller 13. The axis of the lubrication duct 25 is therefore substantially inclined with respect to the high pressure pump shaft 12.
Selon le mode de réalisation de l'invention représenté dans les figures 3 et 4, le conduit de lubrification 25 est dans le prolongement du conduit d'amenée 21 . Plus particulièrement les deux conduits de lubrification 25 et d'amenée 21 sont coaxiaux et obtenus par la même opération de perçage ; ils présentent donc un diamètre intérieur identique. According to the embodiment of the invention shown in FIGS. 3 and 4, the lubrication duct 25 is in the extension of the supply duct 21. More particularly, the two lubrication and supply ducts 21 are coaxial and obtained by the same drilling operation; they therefore have an identical inner diameter.
Toutefois le besoin en huile pour la lubrification de la pompe haute pression est bien inférieur à celui pour la lubrification des éléments de la culasse. II est nécessaire de réduire le débit d'huile s'écoulant dans le conduit de lubrification 25 pour ne pas perturber le débit d'huile dans le conduit d'amenée 21 . Le conduit de lubrification comporte donc un ajutage 30 pour réduire le débit d'huile. However, the need for oil for the lubrication of the high pressure pump is much lower than that for the lubrication of the elements of the cylinder head. It is necessary to reduce the flow of oil flowing in the lubrication duct 25 so as not to disturb the oil flow in the feed duct 21. The lubrication duct therefore comprises a nozzle 30 to reduce the oil flow.
Tel que représenté dans les figures 3 et 4, l'ajutage 30 est formé par un orifice étroit 28 de section réduite traversant radialement une bague annulaire 27. Ladite bague annulaire est insérée dans la rampe principale 20 et elle est coaxiale avec ladite rampe. As shown in Figures 3 and 4, the nozzle 30 is formed by a narrow orifice 28 of reduced cross section radially through an annular ring 27. Said annular ring is inserted into the main ramp 20 and is coaxial with said ramp.
De manière préférentielle, le diamètre extérieur de la bague annulaire 27 est légèrement supérieur au diamètre intérieur de la rampe principale pour permettre un montage par frettage. Preferably, the outer diameter of the annular ring 27 is slightly greater than the inner diameter of the main ramp to allow mounting by hooping.
La bague annulaire 27 comporte ainsi un orifice large 29 et l'orifice étroit 28 traversant sensiblement radialement la bague annulaire. L'orifice large 29 est disposé entourant le débouché 22 du conduit d'amenée 21 et le diamètre de l'orifice large est de manière préférentielle supérieur au diamètre du conduit d'amenée 21 pour ne pas entraîner des pertes de charge dans l'écoulement de l'huile en direction de la culasse. The annular ring 27 thus has a wide orifice 29 and the narrow orifice 28 substantially radially through the annular ring. The wide orifice 29 is arranged surrounding the outlet 22 of the supply duct 21 and the diameter of the wide orifice is preferably greater than the diameter of the supply duct 21 so as not to cause pressure losses in the flow. oil in the direction of the cylinder head.
L'orifice étroit 28 est disposé en regard avec le débouché 26 du conduit de lubrification 25 dans la rampe principale 20 et il présente donc un diamètre différent et plus particulièrement très inférieur au diamètre du conduit de lubrification 25 et de l'orifice large 29. De l'huile pourra ainsi s'évacuer vers le bas et la culasse sans perturber le débit d'huile pour la lubrification de la culasse. The narrow orifice 28 is arranged facing the outlet 26 of the lubrication duct 25 in the main ramp 20 and therefore has a different diameter and more particularly much smaller than the diameter of the lubrication duct 25 and the wide orifice 29. Oil can be drained down and the cylinder head without disrupting the flow of oil for the lubrication of the cylinder head.
Selon le mode de réalisation représenté en figures 3 à 6, la bague annulaire 27 est partie d'un bouchon d'obturation 31 de la rampe principale. According to the embodiment shown in Figures 3 to 6, the annular ring 27 is part of a closure cap 31 of the main ramp.
Le bouchon d'obturation 31 comprend ainsi une plaque 32 sensiblement cylindrique prolongée axialement par la bague annulaire 27. Une encoche radiale 34 s'étend depuis la paroi périphérique 33 de la plaque cylindrique 32 pour être reçue au montage dans une entaille complémentaire creusée 35 dans la paroi du carter-cylindres. L'association de l'encoche et de l'entaille forme un poka-yoke et permet une fiabilité de montage du montage et plus particulièrement de l'agencement de la bague annulaire 27 pour présenter l'orifice large 29 devant le débouché 22 du conduit d'amenée et l'orifice étroit 28 en regard avec le débouché 26 du conduit de lubrification. The closure cap 31 thus comprises a substantially cylindrical plate 32 extended axially by the annular ring 27. A radial notch 34 extends from the peripheral wall 33 of the cylindrical plate 32 to be received on assembly in a complementary notch cut in the wall of the crankcase. The combination of the notch and the notch forms a poka-yoke and allows a mounting reliability of the assembly and more particularly of the arrangement of the annular ring 27 to present the wide orifice 29 in front of the outlet 22 of the duct supply and the narrow orifice 28 opposite the outlet 26 of the lubrication duct.
Le bouchon d'obturation 31 est présenté avec la bague annulaire en regard avec le débouché de la rampe principale 20 en réalisant l'association de l'encoche 34 avec l'entaille 35. Le bouchon est ensuite enfoncé dans la rampe principale jusqu'à l'atteinte d'une butée pour assurer le positionnement axial optimal de la bague annulaire. The closure cap 31 is presented with the annular ring facing the outlet of the main ramp 20 by making the combination of the notch 34 with the notch 35. The stopper is then pressed into the main ramp up to reaching a stop to ensure optimal axial positioning of the annular ring.
Ainsi positionnée, la bague annulaire présente l'orifice large entourant le débouché 22 du conduit d'amenée et l'orifice étroit en vis-à-vis avec le débouché 26 du conduit de lubrification. Les débits d'huile dans chacun des deux conduits sont donc maîtrisés. Thus positioned, the annular ring has the wide orifice surrounding the outlet 22 of the supply duct and the narrow orifice vis-a-vis with the outlet 26 of the lubrication duct. The oil flow rates in each of the two ducts are therefore controlled.
L'objet de l'invention est atteint : le circuit de lubrification comprend une branche dirigée vers la culasse et une autre branche vers la pompe haute pression, les deux branches sont formées par des conduits obtenus par une même opération de perçage traversant la rampe principale et les débits d'huile dans chacune des branches est régulé à l'aide d'une simple bague annulaire partie d'un bouchon d'obturation de la rampe principale 20. The object of the invention is achieved: the lubrication circuit comprises a branch directed towards the cylinder head and another branch to the high pressure pump, the two branches are formed by ducts obtained by the same drilling operation through the main ramp and the oil flow rates in each of the branches is regulated by means of a simple annular ring part of a closure cap of the main ramp 20.
Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution présentées décrites ci-dessus à titre d'exemples, elle en embrasse au contraire toutes les variantes. C'est ainsi notamment que le bouchon peut présenter une lame s'étendant axialement pour limiter la section du débouché 26 du conduit de lubrification 25. It goes without saying that the invention is not limited to the embodiments presented above described as examples, it encompasses all variants. Thus, in particular, the plug may have an axially extending blade to limit the section of the outlet 26 of the lubrication duct 25.

Claims

REVENDICATIONS
1 . Moteur thermique de véhicule automobile comportant une pompe haute pression à carburant (20) agencée à une extrémité longitudinale du moteur tournée vers la face d'accouplement (100) du moteur et actionnée par une came fixée solidaire à un vilebrequin du moteur et un circuit de lubrification (50) , comprenant : 1. Motor vehicle engine comprising a high-pressure fuel pump (20) arranged at a longitudinal end of the engine facing the coupling face (100) of the engine and actuated by a fixed cam secured to a crankshaft of the engine and a motor circuit. lubrication (50), comprising:
un conduit d'amenée (21 ) d'huile à une culasse, creusé dans un carter-cylindres (10),  a feed duct (21) for oil to a cylinder head, hollowed out in a crankcase (10),
- un conduit de lubrification (25) de la pompe haute pression (20) à carburant,  a lubrication duct (25) of the high-pressure pump (20) with fuel,
une rampe principale (20) longitudinale d'alimentation en huile orthogonale aux deux conduits et dans laquelle débouchent les deux conduits caractérisé en ce que le conduit d'amenée (21 ) s'étend sensiblement parallèle à la face d'accouplement (100) dans le prolongement du conduit de lubrification (25) à une extrémité duquel est disposé un ajutage (30) de réduction de débit d'huile.  a longitudinal main oil feed ramp (20) orthogonal to the two ducts and into which the two ducts open, characterized in that the supply duct (21) extends substantially parallel to the coupling face (100) in the extension of the lubrication duct (25) at one end of which is disposed a nozzle (30) for reducing the oil flow.
2. Moteur thermique selon la revendication 1 , caractérisé en ce que le conduit d'amenée (21 ) et le conduit de lubrification (25) sont cylindriques et présentent un diamètre intérieur identique.  2. Heat engine according to claim 1, characterized in that the supply duct (21) and the lubrication duct (25) are cylindrical and have an identical inner diameter.
3. Moteur thermique selon la revendication 2, caractérisé en ce que le conduit d'amenée (21 ) et le conduit de lubrification (25) sont coaxiaux.  3. Heat engine according to claim 2, characterized in that the supply duct (21) and the lubrication duct (25) are coaxial.
4. Moteur thermique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'ajutage (30) est formé par une bague annulaire (27) comportant des orifices radiaux (28,29) de diamètres différents, coaxiale avec la rampe principale et insérée à l'intérieur de ladite rampe pour recouvrir les débouchés (22,26) de chacun des deux conduits en présentant un orifice radial devant un débouché de chacun des conduits d'amenée (21 ) et de lubrification (25).  4. Thermal engine according to any one of claims 1 to 3, characterized in that the nozzle (30) is formed by an annular ring (27) having radial orifices (28,29) of different diameters, coaxial with the main ramp and inserted inside said ramp to cover the outlets (22,26) of each of the two ducts by having a radial orifice in front of an outlet of each of the supply ducts (21) and lubrication (25).
5. Moteur thermique selon la revendication 4, caractérisé en ce que la section de l'orifice radial (28) en vis-à-vis du débouché (26) du conduit de lubrification (25) est inférieure à la section de l'orifice radial (29) entourant le débouché (22) du conduit d'amenée (21 ) dans la rampe principale (20). 5. Thermal engine according to claim 4, characterized in that the section of the radial orifice (28) vis-à-vis the outlet (26) of the conduit of lubrication (25) is less than the section of the radial orifice (29) surrounding the outlet (22) of the supply duct (21) in the main ramp (20).
6. Moteur thermique selon l'une quelconque des revendications 4 ou 5, caractérisé en ce que la bague annulaire (27) est partie d'un bouchon d'obturation (31 ) d'une extrémité de la rampe principale (20) débouchant de la face d'accouplement (100).  6. Thermal engine according to any one of claims 4 or 5, characterized in that the annular ring (27) is part of a closure cap (31) of one end of the main ramp (20) opening out of the coupling face (100).
7. Moteur thermique selon la revendication 6, caractérisé en ce que le bouchon d'obturation (31 ) comporte un moyen d'indexation (34).  7. Heat engine according to claim 6, characterized in that the closure cap (31) comprises an indexing means (34).
8. Moteur thermique selon la revendication 7, caractérisé en ce que le moyen d'indexation comprend une encoche radiale (34) s'étendant depuis une paroi périphérique (33) du bouchon et reçue dans une entaille (35) creusée dans une paroi du carter-cylindres (10).  8. Heat engine according to claim 7, characterized in that the indexing means comprises a radial notch (34) extending from a peripheral wall (33) of the plug and received in a notch (35) hollowed in a wall of the cylinder block (10).
9. Moteur thermique selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le bouchon d'obturation (31 ) est monté à l'extrémité d'accouplement de la rampe principale par frettage.  9. Heat engine according to any one of claims 6 to 8, characterized in that the closure cap (31) is mounted at the coupling end of the main ramp by hooping.
10. Moteur thermique selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le conduit d'amenée (21 ) et le conduit de lubrification (25) sont obtenus par une même opération de perçage.  10. Heat engine according to any one of claims 1 to 9, characterized in that the supply duct (21) and the lubrication duct (25) are obtained by the same drilling operation.
EP18722095.9A 2017-04-14 2018-03-28 Oil circuit with oil nozzle and passage Active EP3610150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1753297A FR3065255B1 (en) 2017-04-14 2017-04-14 OIL CIRCUIT WITH OIL PASSAGE AND ADJUSTMENT
PCT/FR2018/050752 WO2018189445A1 (en) 2017-04-14 2018-03-28 Oil circuit with oil nozzle and passage

Publications (2)

Publication Number Publication Date
EP3610150A1 true EP3610150A1 (en) 2020-02-19
EP3610150B1 EP3610150B1 (en) 2021-11-03

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ID=59031199

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EP18722095.9A Active EP3610150B1 (en) 2017-04-14 2018-03-28 Oil circuit with oil nozzle and passage

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EP (1) EP3610150B1 (en)
FR (1) FR3065255B1 (en)
RU (1) RU2739431C1 (en)
WO (1) WO2018189445A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113756976B (en) * 2021-09-29 2022-07-15 广西玉柴机器股份有限公司 Combined cylinder body

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680387B1 (en) * 1991-08-13 1993-10-01 Renault Regie Nale Usines CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE.
DE19627757A1 (en) * 1996-07-10 1998-01-15 Bosch Gmbh Robert Fuel pump
JP2001073733A (en) * 1999-08-31 2001-03-21 Fuji Heavy Ind Ltd Lubricating device for cam of high-pressure fuel pump
DE102012216594A1 (en) * 2012-09-18 2014-03-20 Robert Bosch Gmbh Internal combustion engine with a crankcase
FR3011588A1 (en) 2013-10-03 2015-04-10 Renault Sa DIESEL ENGINE COMPRISING AN INTEGRATED FUEL PUMP
FR3013774B1 (en) * 2013-11-22 2019-08-23 Renault S.A.S LUBRICATING FUEL INJECTION PUMP INTEGRATED WITH ROLLING AXIS OF ROLLER

Also Published As

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EP3610150B1 (en) 2021-11-03
RU2739431C1 (en) 2020-12-24
FR3065255B1 (en) 2021-04-09
WO2018189445A1 (en) 2018-10-18
FR3065255A1 (en) 2018-10-19

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