WO2018002468A1 - Camshaft holder having bearing caps bored with an oil passage - Google Patents

Camshaft holder having bearing caps bored with an oil passage Download PDF

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Publication number
WO2018002468A1
WO2018002468A1 PCT/FR2017/051548 FR2017051548W WO2018002468A1 WO 2018002468 A1 WO2018002468 A1 WO 2018002468A1 FR 2017051548 W FR2017051548 W FR 2017051548W WO 2018002468 A1 WO2018002468 A1 WO 2018002468A1
Authority
WO
WIPO (PCT)
Prior art keywords
camshaft
cylinder head
holder
bearing caps
bearing
Prior art date
Application number
PCT/FR2017/051548
Other languages
French (fr)
Inventor
Ouanes Bouattay
David Morin
Muriel DELPECH
Laurent Pottier
Mebrouk MESSANI
Original Assignee
Psa Automobiles S.A.
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 Psa Automobiles S.A. filed Critical Psa Automobiles S.A.
Priority to BR112018077017-5A priority Critical patent/BR112018077017A2/en
Priority to CN201780040489.7A priority patent/CN109415996B/en
Priority to EP17735211.9A priority patent/EP3478954B1/en
Publication of WO2018002468A1 publication Critical patent/WO2018002468A1/en

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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
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings

Definitions

  • the invention relates to a camshaft holder intended to be fixed to a cylinder head of an internal combustion engine of a motor vehicle and a set of a cylinder head and a camshaft holder mounted on and secured to the yoke, the interface of the camshaft holder resting against an interface of the cylinder head.
  • the camshaft holder according to the invention comprises bearing caps pierced with an oil passage and the shaft holder is mounted in a single assembly on the cylinder head of the internal combustion engine.
  • a camshaft holder receives at least one camshaft.
  • the camshaft is guided in rotation through at least two bearings, each bearing being formed of an internal cylindrical bearing surface integral with the periphery of the camshaft housed between two half-bearings.
  • the camshaft holder comprises a base supporting a succession of half-bearings, four half-bearings when there are four bearings. These half-spans of the base are respectively associated with a half-span present on one of several bearing caps succeeding, or four bearing caps in the case of four bearings.
  • Each bearing cap therefore has on one side a half-span complementary to a half-span of the base and each half-span of the bearing caps is detachably secured to the half-span of the base, advantageously by two fasteners passing through each bearing cap.
  • Each association of a half-span of the base with a half-bearing of the bearing cap forms an advantageously circular bearing receiving an internal cylindrical bearing secured to the periphery of the camshaft forming a bearing.
  • a face of the camshaft holder has at its periphery an interface intended to be in contact with an interface of the cylinder head.
  • the connection between the two interfaces respectively for the camshaft holder and the yoke is performed by fasteners regularly distributed around the yoke and the camshaft holder.
  • There are various architectures of cylinder head assembly with at least one camshaft holder For example, it is known a cylinder head associated with a camshaft holder lower and to a higher camshaft holder. There may also be a camshaft holder with simple bearing cap.
  • camshaft holder and its camshaft line are machined when the camshaft holder is already mounted on the cylinder head. This requires a mounting time of the camshaft holder on the cylinder head and the line of camshafts in the camshaft holder.
  • CN-A-101956625 discloses a cylinder head lubrication structure comprising a cylinder head body, a camshaft front bearing cap, a camshaft intermediate bearing cap and a cap. a camshaft rear bearing, a camshaft ring arranged inside each bearing cap.
  • a hole for the lubricating oil is provided in the front bearing cap of the camshaft and a hole for the lubricating oil is provided in the cap of the rear bearing of the camshaft. This hole is however not integrated in the cylinder head, the bearing cap covering a lower half-range which is housed in the body of the cylinder head.
  • the problem underlying the invention is, firstly, to design a camshaft holder whose connection to a cylinder head is simplified while having an increased accuracy of mounting in the cylinder head and, on the other hand, to provide a high pressure lubrication circuit that is compatible with a variable distribution.
  • a camshaft holder intended to be fixed on a cylinder head of a motor vehicle internal combustion engine, a face of the camshaft holder having at its periphery a interface intended to be in contact with an interface of the cylinder head, the camshaft holder housing at least one camshaft, the camshaft being inserted between a base of the camshaft holder comprising a succession of half-bearings and bearing caps each carrying on one side a half-span complementary to one half-span of the base, each half-span of the bearing caps being releasably secured to a half-span of the base, characterized in that that the bearing hats are secured to the camshaft carrier projecting from the face having the interface, each bearing cap having a lubrication oil passage.
  • the technical effect is to obtain a shaft holder completely mounted with bearing caps and camshaft, this independently of a cylinder head.
  • the shaft holder is in a semi-finished state, that is to say that it only remains to make adjustments, on the one hand, lubricating oil passages with elements such as wells present in the cylinder head and, on the other hand, shaft-holder and cylinder head interfaces.
  • Such a shaft holder can be mounted at a supplier and sent as a whole to the car manufacturer who will make the final adjustments.
  • the fact of incorporating the lubrication oil passages in the bearing caps makes it possible to make the shaft holder compatible with different types of engine, in particular engines with a variable distribution.
  • the bearing caps cover the shaft holder on its face intended to be secured to the cylinder head and not on the opposite side of the tree holder as is conventionally the case in the state of the art.
  • the lubricating oil passage of each bearing cap passes through the bearing cap from one side of the bearing cap carrying the half-bearing to an opposite face projecting towards the outside of the carrier. camshaft of the face presenting the interface.
  • the lubricating oil passage is extended by an oil line on the opposite side projecting outwardly from the camshaft holder of the face having the interface.
  • this oil duct which is intended to penetrate the deeper into the cylinder head, for example by being received in a respective well for each oil duct arranged in the cylinder head.
  • the location of the oil passages on the bearing caps differs according to the position of the bearing cap in the camshaft holder. This may be the case in particular for the first and last bearing caps of a succession of bearing caps in the length of the tree carrier.
  • the camshaft holder houses at least two camshafts, the half-bearings of the base and associated bearing caps in the longitudinal direction of the camshaft holder, the bearing caps associated with a first tree camshaft being symmetrical to the bearing caps of a second camshaft relative to the longitudinal longitudinal direction of the camshaft holder.
  • an auxiliary interface completing the interface at the periphery of the camshaft holder, the auxiliary interface forming a U interposed between said at least two camshafts of the camshaft holder in having a symmetry with respect to the median longitudinal direction of the camshaft holder.
  • the auxiliary interface delimits an internal box that can receive elements associated with the internal combustion engine as a fuel injection system.
  • the half-bearings of the bearing caps are secured by at least two fasteners respectively to a half-span of the base to form an inner cylindrical bearing secured to the periphery of said at least one camshaft.
  • the invention also relates to a set of a cylinder head and a camshaft holder mounted on the cylinder head, the interface of the camshaft holder resting against an interface of the cylinder head, crossing fastening elements the interfaces of the camshaft holder and the cylinder head, characterized in that the camshaft holder is as previously described, the bearing caps being portions of the camshaft holder most internal to the cylinder head.
  • the portions of the cylinder head vis-à-vis the bearing caps have wells respectively aligned with a lubricating oil passage or, when the lubrication oil passage is extended by a conduit of oil, the wells receive in their interior respectively an oil duct.
  • the invention relates to a method of manufacturing such a set of a cylinder head and a camshaft holder comprising the step of machining the camshaft holder and bearing caps with mounting of said at least one camshaft in the camshaft holder prior to mounting the camshaft holder on the cylinder head, the bearing caps being in a semi-finished state after this machining, this step being followed by the step machining the interface of the camshaft holder with the cylinder head and bearing caps, the bearing caps being secured to the camshaft holder.
  • the manufacturing method according to the invention is therefore divided into two main steps, namely a machining and assembly of the shaft holder regardless of its position on the cylinder head and a positioning of the tree-carrier forming a whole on and in the cylinder head with a final machining of the parts in contact with the shaft holder and the cylinder head.
  • FIG. 1 is a schematic representation of a perspective view of a camshaft holder according to the present invention, the camshaft holder being provided with bearing caps projecting from its face to form the interface with the cylinder head and the bearing caps being provided with a lubricating oil passage,
  • FIG. 2 is a schematic representation of a perspective view according to the present invention of a cylinder head having bearing caps of a camshaft holder according to the present invention, the remainder of the camshaft holder other than the bearing caps having been obscured in this figure to make visible the integration of the bearing caps in the cylinder head.
  • the present invention relates to a camshaft holder 1 for attachment to a cylinder head 2 of an internal combustion engine of a motor vehicle.
  • Figure 1 shows a camshaft holder 1 and Figure 2 shows a cylinder head 2 of a motor vehicle with bearing caps 6 forming part of the camshaft holder 1.
  • Figure 2 does not correspond to reality, since, according to the invention, the bearing caps 6 are applied to the cylinder head 2 with the rest of the camshaft holder 1, this remains n ' being not illustrated in Figure 2 to make visible the bearing caps 6.
  • the camshaft 1 with all its elements and in particular its bearing caps 6 secured to the tree holder 1 cam which is mounted on the cylinder head 2.
  • a face of the camshaft holder 1 has at its periphery an interface 3 intended to be in contact with an interface 4 of the yoke 2.
  • the camshaft holder 1 housed at minus one camshaft, in Figure 1 two camshafts, the camshaft being inserted between a base or frame of the camshaft holder 1 comprising a succession of half-spans 5.
  • the camshaft holder 1 also comprises bearing caps 6 each carrying on one side a complementary half-span and vis-à-vis a half-span 5 of the base, these bearing caps 6 being removable from the camshaft holder 1.
  • Each half-bearing bearing caps 6 is detachably secured to a half-span 5 of the base forming an advantageously circular bearing receiving the internal cylindrical bearing secured to the periphery of the camshaft.
  • the bearing caps 6 are secured to the camshaft holder 1 protruding from the face having the interface 3, each bearing cap 6 having a passage 7 of lubricating oil.
  • the camshaft holder 1 it is common for the camshaft holder 1 to have the bearing caps 6 on its face opposite to that secured to the cylinder head 2.
  • the present invention provides the opposite configuration for which the bearing caps 6 are arranged on the face of the camshaft support 1 applied against the cylinder head 2.
  • the lubricating oil is advantageously under high pressure.
  • the half-bearings of the bearing caps 6 can be secured by at least two fasteners respectively to a half-span 5 of the base to form a internal cylindrical bearing secured to the periphery of said at least one camshaft.
  • the passage 7 of lubricating oil passes through the bearing cap 6 by a flat face intended to contact the cylinder head 2 and supporting the half-scope opening on the half-scope.
  • the passages 7 of lubricating oil in the bearing caps 6 are hidden in FIG. 1 by a respective oil duct 8, but passages 7 of oil can be better seen in FIG. 2 under reference 7 for some hats. 6.
  • the passage 7 of lubricating oil of each bearing cap 6 passes through the bearing cap 6 from side to side of the bearing cap 6 carrying the half-scope to an opposite face projecting outwardly of the 1-camshaft holder of the face having the interface 3.
  • the passage 7 of lubricating oil therefore extends substantially perpendicularly to the junction plane of the cylinder head 2 and camshaft holder 1 or with a low angle inclination ratio to the direction perpendicular to this junction plane.
  • the passage 7 of lubricating oil can be extended by an oil duct 8 on the opposite side protruding outwardly of the camshaft holder 1 of the face having the interface 3.
  • Each duct 8 The oil is intended to enter a well 10 provided in the cylinder head 2 as shown in FIG. 2 for two wells 10 but there is a well for each oil line 8.
  • bearing caps 6 There may be several types of bearing caps 6 differing by their oil duct 8 and / or the positioning of the passage 7 of oil on the bearing cap 6. All the bearing caps 6 can present, on the opposite side projecting outwardly from the camshaft holder 1, the opening of the oil passage 7 centered or slightly offset to the outside of the camshaft holder 1 on this face.
  • the location of the oil passages 7 and / or the dimensions of the oil duct 8 on the bearing caps 6 may differ according to the position of the bearing cap 6 in the camshaft holder 1.
  • a camshaft holder 1 may carry four bearing caps 6 per camshaft which may succeed one another in the length of the camshaft holder 1.
  • the first bearing cap 6 of the succession may have a wider passage than those of other bearing caps 6 and the last bearing cap 6 may have an oil duct 8 more inclined than the other bearing caps 6, the intermediate bearing caps 6 being substantially similar.
  • the first bearing caps 6 of the two successions for the two camshafts may have a wider passage than those of the other bearing caps 6. Only the last bearing cap 6 of a camshaft may have an oil duct 8 more inclined than the other bearing caps 6, the intermediate bearing caps 6 being substantially similar for the two successions.
  • Other configurations are of course possible.
  • the camshaft holder 1 can accommodate at least two camshafts.
  • the half-bearings 5 of the base and the associated bearing caps 6 can follow in the longitudinal direction of the camshaft holder 1.
  • the half-bearings 5 associated with a first camshaft may be symmetrical to the half-lands of a second camshaft relative to the median longitudinal direction of the camshaft carrier 1. This can be valid for all oil passages and oil ducts except for the oil line of the last oil cap of a succession of a camshaft which may be more inclined than its screw. to the succession of the other camshaft.
  • auxiliary interface 3a complementing the interface 3 at the periphery of the camshaft holder 1, the auxiliary interface 3a forming a U interposed between said at least two camshafts of the tree holder 1 to cams having a symmetry with respect to the longitudinal longitudinal direction of the camshaft holder 1.
  • the auxiliary interface 3a U can form a box advantageously sealed or sealed for fuel injectors in the internal combustion engine housed in the cylinder head 2 or other auxiliary elements of the engine.
  • the auxiliary interface 3a is applied against an auxiliary interface 4a carried by the cylinder head 2.
  • the invention also relates to a set of a cylinder head 2 and a camshaft holder 1 mounted on the cylinder head 2, the interface 3 of the camshaft holder 1 resting against an interface 4 of the cylinder head 2, fastening elements passing through the interfaces 3, 4 of the camshaft holder 1 and the yoke 2.
  • the camshaft holder 1 is such that than previously described, the bearing caps 6 being portions of the camshaft holder 1 more internal to the cylinder head 2.
  • the portions of the yoke 2 vis-à-vis the bearing caps 6 have wells 10 aligned respectively with a passage 7 of lubricating oil or when the passage 7 of lubricating oil is extended by an oil duct 8, the wells 10 receive in their interior respectively an oil duct 8.
  • the invention also relates to a method of manufacturing a set of a cylinder head 2 and a camshaft holder 1 as previously described.
  • the method comprises a step of machining the camshaft holder 1 and the bearing caps 6 with mounting said at least one camshaft in the camshaft holder 1 prior to mounting the camshaft holder 1 on the 2.
  • the bearing caps 6 as well as the camshaft holder 1 are in a semi-finished state after this machining.
  • the machining step of the camshaft holder 1 is followed by a step of machining the interface 3 of the camshaft holder 1 with the yoke 2 and the passage 7 of oil in the bearing caps 6 , the bearing caps 6 being integral with the camshaft holder 1.
  • semi-finished state it is understood a state where the machining of the camshaft holder 1 has been carried out and that only the adjustment machining operations of the camshaft 1 cam holder to the cylinder head 2, c that is to say mainly interface 3 and bearing caps 6 including oil ducts 8 to enter a respective well 10 arranged in the cylinder head 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The invention relates to a camshaft holder (1) intended for being attached to a cylinder head of an internal combustion engine of a motor vehicle, one surface of the camshaft holder (1) having, at the periphery thereof, an interface (3) intended for engaging with an interface of the cylinder head, the camshaft holder (1) housing at least one camshaft inserted between a base of the camshaft holder (1) comprising a series of half-seats (5) and bearing caps (6) each supporting on one side a half-seat complementing a half-seat (5) of the base, each half-seat of the bearing caps (6) being removably secured to a half-seat (5) of the base. The bearing caps (6) are secured to the camshaft holder (1) by protruding from the surface having the interface (3), each bearing cap (6) having a passage (7) for lubricating oil.

Description

PORTE-ARBRE A CAMES AVEC CHAPEAUX DE PALIER PERCES  CAMSHAFT HOLDER WITH PERCES BEARING CAPS
D'UN PASSAGE D'HUILE  OF A PASSAGE OF OIL
[0001 ] L'invention porte sur un porte-arbre à cames destiné à être fixé sur une culasse de moteur à combustion interne de véhicule automobile et un ensemble d'une culasse et d'un porte-arbre à cames monté sur et solidarisé à la culasse, l'interface du porte-arbre à cames reposant contre une interface de la culasse. The invention relates to a camshaft holder intended to be fixed to a cylinder head of an internal combustion engine of a motor vehicle and a set of a cylinder head and a camshaft holder mounted on and secured to the yoke, the interface of the camshaft holder resting against an interface of the cylinder head.
[0002] Le porte-arbre à cames selon l'invention comporte des chapeaux de palier percés d'un passage d'huile et le porte-arbre est monté en un seul ensemble sur la culasse du moteur à combustion interne. The camshaft holder according to the invention comprises bearing caps pierced with an oil passage and the shaft holder is mounted in a single assembly on the cylinder head of the internal combustion engine.
[0003] Un porte-arbre à cames reçoit au moins un arbre à cames. L'arbre à cames est guidé en rotation par l'intermédiaire d'au moins deux paliers, chaque palier étant formé d'une portée cylindrique interne solidaire de la périphérie de l'arbre à cames logé entre deux demi-portées. [0004] Le porte-arbre à cames comprend une base supportant une succession de demi- portées, soit quatre demi-portées quand il y a quatre paliers. Ces demi-portées de la base sont associées respectivement à une demi-portée présente sur un de plusieurs chapeaux de palier se succédant, soit quatre chapeaux de palier dans le cas de quatre paliers. [0003] A camshaft holder receives at least one camshaft. The camshaft is guided in rotation through at least two bearings, each bearing being formed of an internal cylindrical bearing surface integral with the periphery of the camshaft housed between two half-bearings. The camshaft holder comprises a base supporting a succession of half-bearings, four half-bearings when there are four bearings. These half-spans of the base are respectively associated with a half-span present on one of several bearing caps succeeding, or four bearing caps in the case of four bearings.
[0005] Chaque chapeau de palier comporte donc sur un côté une demi-portée complémentaire d'une demi-portée de la base et chaque demi-portée des chapeaux de palier est solidarisée de manière amovible à la demi-portée de la base, avantageusement par deux éléments de fixation traversant chaque chapeau de palier. Chaque association d'une demi-portée de la base avec une demi-portée du chapeau de palier forme une portée avantageusement circulaire recevant une portée cylindrique interne solidaire de la périphérie de l'arbre à cames en formant un palier. Each bearing cap therefore has on one side a half-span complementary to a half-span of the base and each half-span of the bearing caps is detachably secured to the half-span of the base, advantageously by two fasteners passing through each bearing cap. Each association of a half-span of the base with a half-bearing of the bearing cap forms an advantageously circular bearing receiving an internal cylindrical bearing secured to the periphery of the camshaft forming a bearing.
[0006] Une face du porte-arbre à cames présente à sa périphérie une interface destinée à être en contact avec une interface de la culasse. La solidarisation entre les deux interfaces respectivement pour le porte-arbre à cames et la culasse est effectuée par des éléments de fixation régulièrement répartis autour de la culasse et du porte-arbre à cames. [0007] Il existe diverses architectures d'ensemble de culasse avec au moins un porte- arbre à cames. Par exemple, il est connu une culasse associée à un porte-arbre à cames inférieur et à un porte-arbre à cames supérieur. Il peut aussi exister un porte-arbre à cames avec chapeau de palier simple. A face of the camshaft holder has at its periphery an interface intended to be in contact with an interface of the cylinder head. The connection between the two interfaces respectively for the camshaft holder and the yoke is performed by fasteners regularly distributed around the yoke and the camshaft holder. There are various architectures of cylinder head assembly with at least one camshaft holder. For example, it is known a cylinder head associated with a camshaft holder lower and to a higher camshaft holder. There may also be a camshaft holder with simple bearing cap.
[0008] Fréquemment, un porte-arbre à cames et sa ligne d'arbre à cames sont usinés quand le porte-arbre à cames est déjà monté sur la culasse. Ceci requiert un temps de montage du porte-arbre à cames sur la culasse puis de la ligne d'arbres cames dans le porte-arbre à cames. Frequently, a camshaft holder and its camshaft line are machined when the camshaft holder is already mounted on the cylinder head. This requires a mounting time of the camshaft holder on the cylinder head and the line of camshafts in the camshaft holder.
[0009] De plus, pour la lubrification de l'arbres à cames et des paliers, il n'est plus possible de passer par l'arbre à cames du fait de la présence de distributions variables du type à levée de came et du fait que l'usinage d'un canal longitudinal pour circuit huile haute pression sur le porte-arbre à came est très difficile à effectuer dans le cas d'une fonderie sous pression. In addition, for the lubrication of the camshaft and bearings, it is no longer possible to pass through the camshaft due to the presence of variable distributions of the type cam lift and the fact that the machining of a longitudinal channel for high pressure oil circuit on the camshaft carrier is very difficult to perform in the case of a pressure foundry.
[0010] Par exemple, le document CN-A-101956625 décrit une structure de lubrification pour culasse comprenant un corps de culasse, un chapeau de palier avant d'arbre à cames, un chapeau de palier intermédiaire d'arbre à cames et un chapeau de palier arrière d'arbre à cames, une bague d'arbre à cames ménagée à l'intérieur de chaque chapeau de palier. Un orifice pour l'huile lubrifiante est ménagé dans le chapeau du palier avant de l'arbre à cames et un orifice pour l'huile lubrifiante est ménagé dans le chapeau du palier arrière de l'arbre à cames. Cet orifice n'est cependant pas intégré dans la culasse, le chapeau de palier coiffant une demi-portée inférieure qui, elle, est logée dans le corps de la culasse. For example, CN-A-101956625 discloses a cylinder head lubrication structure comprising a cylinder head body, a camshaft front bearing cap, a camshaft intermediate bearing cap and a cap. a camshaft rear bearing, a camshaft ring arranged inside each bearing cap. A hole for the lubricating oil is provided in the front bearing cap of the camshaft and a hole for the lubricating oil is provided in the cap of the rear bearing of the camshaft. This hole is however not integrated in the cylinder head, the bearing cap covering a lower half-range which is housed in the body of the cylinder head.
[001 1 ] Par conséquent, le problème à la base de l'invention est, d'une part, de concevoir un porte-arbre à cames dont la solidarisation à une culasse soit simplifiée tout en présentant une précision accrue de montage dans la culasse et, d'autre part, de prévoir un circuit haute pression de lubrification qui soit compatible avec une distribution variable. [0012] Pour atteindre cet objectif, il est prévu selon l'invention un porte-arbre à cames destiné à être fixé sur une culasse de moteur à combustion interne de véhicule automobile, une face du porte-arbre à cames présentant à sa périphérie une interface destinée à être en contact avec une interface de la culasse, le porte-arbre à cames logeant au moins un arbres à cames, l'arbre à cames étant inséré entre une base du porte-arbre à cames comprenant une succession de demi-portées et des chapeaux de palier portant chacun sur un côté une demi-portée complémentaire d'une demi-portée de la base, chaque demi-portée des chapeaux de palier étant solidarisée de manière amovible à une demi-portée de la base, caractérisé en ce que les chapeaux de palier sont solidarisés sur le porte-arbre à cames en faisant saillie de la face présentant l'interface, chaque chapeau de palier présentant un passage d'huile de lubrification. [001 1] Therefore, the problem underlying the invention is, firstly, to design a camshaft holder whose connection to a cylinder head is simplified while having an increased accuracy of mounting in the cylinder head and, on the other hand, to provide a high pressure lubrication circuit that is compatible with a variable distribution. To achieve this objective, there is provided according to the invention a camshaft holder intended to be fixed on a cylinder head of a motor vehicle internal combustion engine, a face of the camshaft holder having at its periphery a interface intended to be in contact with an interface of the cylinder head, the camshaft holder housing at least one camshaft, the camshaft being inserted between a base of the camshaft holder comprising a succession of half-bearings and bearing caps each carrying on one side a half-span complementary to one half-span of the base, each half-span of the bearing caps being releasably secured to a half-span of the base, characterized in that that the bearing hats are secured to the camshaft carrier projecting from the face having the interface, each bearing cap having a lubrication oil passage.
[0013] L'effet technique est d'obtenir un porte-arbre monté complètement avec chapeaux de palier et arbre à cames, ceci indépendamment d'une culasse. Le porte-arbre est dans un état semi-fini, c'est-à-dire qu'il ne reste plus qu'à procéder aux ajustages, d'une part, des passages d'huile de lubrification avec des éléments comme des puits présents dans la culasse et, d'autre part, des interfaces porte-arbre et culasse. Un tel porte-arbre peut être monté chez un fournisseur et envoyé en un tout au constructeur automobile qui procédera aux derniers ajustages. [0014] De plus, le fait d'incorporer les passages d'huile de lubrification dans les chapeaux de palier permet de rendre compatible le porte-arbre avec différents types de moteur, notamment des moteurs dotés d'une distribution variable. Pour ce faire, les chapeaux de palier coiffent le porte-arbre sur sa face destinée à être solidarisée avec la culasse et non sur la face opposée du porte-arbre comme c'est classiquement le cas dans l'état de la technique. The technical effect is to obtain a shaft holder completely mounted with bearing caps and camshaft, this independently of a cylinder head. The shaft holder is in a semi-finished state, that is to say that it only remains to make adjustments, on the one hand, lubricating oil passages with elements such as wells present in the cylinder head and, on the other hand, shaft-holder and cylinder head interfaces. Such a shaft holder can be mounted at a supplier and sent as a whole to the car manufacturer who will make the final adjustments. In addition, the fact of incorporating the lubrication oil passages in the bearing caps makes it possible to make the shaft holder compatible with different types of engine, in particular engines with a variable distribution. To do this, the bearing caps cover the shaft holder on its face intended to be secured to the cylinder head and not on the opposite side of the tree holder as is conventionally the case in the state of the art.
[0015] Avantageusement, le passage d'huile de lubrification de chaque chapeau de palier traverse le chapeau de palier de part en part du côté du chapeau de palier portant la demi-portée vers une face opposée faisant saillie vers l'extérieur du porte-arbre à cames de la face présentant l'interface. [0015] Advantageously, the lubricating oil passage of each bearing cap passes through the bearing cap from one side of the bearing cap carrying the half-bearing to an opposite face projecting towards the outside of the carrier. camshaft of the face presenting the interface.
[0016] Avantageusement, le passage d'huile de lubrification est prolongé par un conduit d'huile sur la face opposée faisant saillie vers l'extérieur du porte-arbre à cames de la face présentant l'interface. Pour chaque chapeau de palier, c'est ce conduit d'huile qui est destiné à pénétrer le plus profondément dans la culasse, en étant par exemple reçu dans un puits respectif pour chaque conduit d'huile aménagé dans la culasse. Advantageously, the lubricating oil passage is extended by an oil line on the opposite side projecting outwardly from the camshaft holder of the face having the interface. For each bearing cap, it is this oil duct which is intended to penetrate the deeper into the cylinder head, for example by being received in a respective well for each oil duct arranged in the cylinder head.
[0017] Avantageusement, la localisation des passages d'huile sur les chapeaux de palier diffère selon la position du chapeau de palier dans le porte-arbre à cames. Cela peut être le cas notamment pour les premier et dernier chapeaux de palier d'une succession de chapeaux de palier dans la longueur du porte-arbre. [0017] Advantageously, the location of the oil passages on the bearing caps differs according to the position of the bearing cap in the camshaft holder. This may be the case in particular for the first and last bearing caps of a succession of bearing caps in the length of the tree carrier.
[0018] Avantageusement, le porte-arbre à cames loge au moins deux arbres à cames, les demi-portées de la base et des chapeaux de palier associés se suivant en direction longitudinale du porte-arbre à cames, les chapeaux de palier associés à un premier arbre à cames étant symétriques aux chapeaux de palier d'un deuxième arbre à cames par rapport à la direction longitudinale médiane du porte-arbre à cames. Advantageously, the camshaft holder houses at least two camshafts, the half-bearings of the base and associated bearing caps in the longitudinal direction of the camshaft holder, the bearing caps associated with a first tree camshaft being symmetrical to the bearing caps of a second camshaft relative to the longitudinal longitudinal direction of the camshaft holder.
[0019] Avantageusement, il est prévu une interface auxiliaire complétant l'interface à la périphérie du porte-arbre à cames, l'interface auxiliaire formant un U s'intercalant entre lesdits au moins deux arbres à cames du porte-arbre à cames en présentant une symétrie par rapport à la direction longitudinale médiane du porte-arbre à cames. L'interface auxiliaire délimite un caisson interne pouvant recevoir des éléments associés au moteur à combustion interne comme un système d'injection de carburant. Advantageously, there is provided an auxiliary interface completing the interface at the periphery of the camshaft holder, the auxiliary interface forming a U interposed between said at least two camshafts of the camshaft holder in having a symmetry with respect to the median longitudinal direction of the camshaft holder. The auxiliary interface delimits an internal box that can receive elements associated with the internal combustion engine as a fuel injection system.
[0020] Avantageusement, les demi-portées des chapeaux de palier sont solidarisées par au moins deux éléments de fixation respectivement à une demi-portée de la base pour former une portée cylindrique interne solidaire de la périphérie dudit au moins un arbres à cames. Advantageously, the half-bearings of the bearing caps are secured by at least two fasteners respectively to a half-span of the base to form an inner cylindrical bearing secured to the periphery of said at least one camshaft.
[0021 ] L'invention concerne aussi un ensemble d'une culasse et d'un porte-arbre à cames monté sur la culasse, l'interface du porte-arbre à cames reposant contre une interface de la culasse, des éléments de solidarisation traversant les interfaces du porte- arbre à cames et de la culasse, caractérisé en ce que le porte-arbre à cames est tel que précédemment décrit, les chapeaux de palier étant des portions du porte-arbre à cames les plus internes à la culasse. The invention also relates to a set of a cylinder head and a camshaft holder mounted on the cylinder head, the interface of the camshaft holder resting against an interface of the cylinder head, crossing fastening elements the interfaces of the camshaft holder and the cylinder head, characterized in that the camshaft holder is as previously described, the bearing caps being portions of the camshaft holder most internal to the cylinder head.
[0022] Avantageusement, les portions de la culasse en vis-à-vis des chapeaux de palier présentent des puits alignés respectivement avec un passage d'huile de lubrification ou, quand le passage d'huile de lubrification est prolongé par un conduit d'huile, les puits reçoivent en leur intérieur respectivement un conduit d'huile. Advantageously, the portions of the cylinder head vis-à-vis the bearing caps have wells respectively aligned with a lubricating oil passage or, when the lubrication oil passage is extended by a conduit of oil, the wells receive in their interior respectively an oil duct.
[0023] L'invention concerne enfin un procédé de fabrication d'un tel ensemble d'une culasse et d'un porte-arbre à cames comprenant l'étape d'usinage du porte-arbre à cames et des chapeaux de palier avec montage dudit au moins un arbre à cames dans le porte- arbre à cames préalablement au montage du porte-arbre à cames sur la culasse, les chapeaux de palier étant dans un état semi-fini après cet usinage, cette étape étant suivie par l'étape d'usinage de l'interface du porte-arbre à cames avec la culasse et des chapeaux de palier, les chapeaux de palier étant solidaires du porte-arbre à cames. [0024] Le procédé de fabrication selon l'invention se décompose donc en deux grandes étapes, à savoir un usinage et un assemblage du porte-arbre indépendamment de son positionnement sur la culasse puis un positionnement du porte-arbre formant un tout sur et dans la culasse avec un usinage final des parties en contact du porte-arbre et de la culasse. Finally, the invention relates to a method of manufacturing such a set of a cylinder head and a camshaft holder comprising the step of machining the camshaft holder and bearing caps with mounting of said at least one camshaft in the camshaft holder prior to mounting the camshaft holder on the cylinder head, the bearing caps being in a semi-finished state after this machining, this step being followed by the step machining the interface of the camshaft holder with the cylinder head and bearing caps, the bearing caps being secured to the camshaft holder. The manufacturing method according to the invention is therefore divided into two main steps, namely a machining and assembly of the shaft holder regardless of its position on the cylinder head and a positioning of the tree-carrier forming a whole on and in the cylinder head with a final machining of the parts in contact with the shaft holder and the cylinder head.
[0025] Le fait que les ajustements concernant les chapeaux de palier soient effectués avec les chapeaux de palier solidarisés au porte-arbre permet une meilleure précision des éléments du porte-arbre en interface avec la culasse. Avec les chapeaux de palier positionnés entre le reste du porte-arbre et la culasse, le circuit d'huile est interne à l'ensemble culasse et porte-arbre, ce qui ne pourrait être le cas avec les chapeaux de palier positionnés sur l'autre face du porte-arbre que celle appliquée sur la culasse, donc extérieurs à la culasse, comme le proposait le document CN-A-101956625. The fact that the adjustments on the bearing caps are made with the bearing caps secured to the shaft holder allows a better accuracy of the elements of the shaft holder in interface with the cylinder head. With the bearing caps positioned between the rest of the shaft carrier and the cylinder head, the oil circuit is internal to the cylinder head and shaft assembly, which could not be the case with the bearing caps positioned on the other side of the shaft holder than that applied to the cylinder head, therefore outside the cylinder head, as proposed in CN-A-101956625.
[0026] D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et au regard des dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels : Other features, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the accompanying drawings given as non-limiting examples and in which:
- la figure 1 est une représentation schématique d'une vue en perspective d'un porte-arbre à cames selon la présente invention, le porte-arbre à cames étant équipé de chapeaux de palier faisant saillie de sa face destinée à former l'interface avec la culasse et les chapeaux de palier étant munis d'un passage d'huile de lubrification,  - Figure 1 is a schematic representation of a perspective view of a camshaft holder according to the present invention, the camshaft holder being provided with bearing caps projecting from its face to form the interface with the cylinder head and the bearing caps being provided with a lubricating oil passage,
- la figure 2 est une représentation schématique d'une vue en perspective selon la présente invention d'une culasse présentant des chapeaux de palier d'un porte-arbre à cames selon la présente invention, le reste du porte-arbre à cames autre que les chapeaux de palier ayant été occulté à cette figure afin de rendre visible l'intégration des chapeaux de palier dans la culasse.  FIG. 2 is a schematic representation of a perspective view according to the present invention of a cylinder head having bearing caps of a camshaft holder according to the present invention, the remainder of the camshaft holder other than the bearing caps having been obscured in this figure to make visible the integration of the bearing caps in the cylinder head.
[0027] Il est à garder à l'esprit que les figures sont données à titre d'exemples et ne sont pas limitatives de l'invention. Elles constituent des représentations schématiques de principe destinées à faciliter la compréhension de l'invention et ne sont pas nécessairement à l'échelle des applications pratiques. En particulier, les dimensions des différents éléments illustrés ne sont pas représentatives de la réalité. It is to be borne in mind that the figures are given by way of examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily at the scale of practical applications. In particular, the dimensions of the various elements illustrated are not representative of reality.
[0028] Dans ce qui va suivre, il est fait référence à toutes les figures prises en combinaison. Quand il est fait référence à une ou des figures spécifiques, ces figures sont à prendre en combinaison avec les autres figures pour la reconnaissance des références numériques désignées. [0029] En se référant à toutes les figures, la présente invention concerne un porte-arbre 1 à cames destiné à être fixé sur une culasse 2 de moteur à combustion interne de véhicule automobile. In what follows, it is referred to all the figures taken in combination. When reference is made to one or more specific figures, these figures are to be taken in combination with the other figures for the recognition of the designated reference numerals. Referring to all the figures, the present invention relates to a camshaft holder 1 for attachment to a cylinder head 2 of an internal combustion engine of a motor vehicle.
[0030] La figure 1 montre un porte-arbre 1 à cames et la figure 2 montre une culasse 2 de véhicule automobile avec des chapeaux de palier 6 faisant partie du porte-arbre 1 à cames. Il convient de noter que la figure 2 ne correspond pas à la réalité, étant donné que, selon l'invention, les chapeaux de palier 6 sont appliqués sur la culasse 2 avec le reste du porte-arbre 1 à cames, ce reste n'étant pas illustré à la figure 2 pour rendre visibles les chapeaux de palier 6. Dans le cadre de l'invention, c'est le porte-arbre 1 à cames avec tous ses éléments et notamment ses chapeaux de palier 6 solidarisés au porte-arbre 1 à cames qui est monté sur la culasse 2. Figure 1 shows a camshaft holder 1 and Figure 2 shows a cylinder head 2 of a motor vehicle with bearing caps 6 forming part of the camshaft holder 1. It should be noted that Figure 2 does not correspond to reality, since, according to the invention, the bearing caps 6 are applied to the cylinder head 2 with the rest of the camshaft holder 1, this remains n ' being not illustrated in Figure 2 to make visible the bearing caps 6. In the context of the invention is the camshaft 1 with all its elements and in particular its bearing caps 6 secured to the tree holder 1 cam which is mounted on the cylinder head 2.
[0031 ] En se référant aux toutes les figures, une face du porte-arbre 1 à cames présente à sa périphérie une interface 3 destinée à être en contact avec une interface 4 de la culasse 2. Le porte-arbre 1 à cames loge au moins un arbres à cames, à la figure 1 deux arbres à cames, l'arbre à cames étant inséré entre une base ou ossature du porte-arbre 1 à cames comprenant une succession de demi-portées 5. Le porte-arbre 1 à cames comprend aussi des chapeaux de palier 6 portant chacun sur un côté une demi-portée complémentaire et en vis-à-vis d'une demi-portée 5 de la base, ces chapeaux de palier 6 étant amovibles du porte-arbre 1 à cames. [0032] Chaque demi-portée des chapeaux de palier 6 est solidarisée de manière amovible à une demi-portée 5 de la base en formant une portée avantageusement circulaire recevant la portée cylindrique interne solidaire de la périphérie de l'arbre à cames. Referring to all the figures, a face of the camshaft holder 1 has at its periphery an interface 3 intended to be in contact with an interface 4 of the yoke 2. The camshaft holder 1 housed at minus one camshaft, in Figure 1 two camshafts, the camshaft being inserted between a base or frame of the camshaft holder 1 comprising a succession of half-spans 5. The camshaft holder 1 also comprises bearing caps 6 each carrying on one side a complementary half-span and vis-à-vis a half-span 5 of the base, these bearing caps 6 being removable from the camshaft holder 1. Each half-bearing bearing caps 6 is detachably secured to a half-span 5 of the base forming an advantageously circular bearing receiving the internal cylindrical bearing secured to the periphery of the camshaft.
[0033] Selon l'invention, les chapeaux de palier 6 sont solidarisés sur le porte-arbre 1 à cames en faisant saillie de la face présentant l'interface 3, chaque chapeau de palier 6 présentant un passage 7 d'huile de lubrification. Selon l'état de la technique, il est fréquent que le porte-arbre 1 à cames présente les chapeaux de palier 6 sur sa face opposée à celle solidarisée à la culasse 2. La présente invention prévoit la configuration inverse pour laquelle les chapeaux de palier 6 sont disposés sur la face du porte-arbre 1 à cames appliquée contre la culasse 2. L'huile de lubrification est avantageusement sous haute pression. According to the invention, the bearing caps 6 are secured to the camshaft holder 1 protruding from the face having the interface 3, each bearing cap 6 having a passage 7 of lubricating oil. According to the state of the art, it is common for the camshaft holder 1 to have the bearing caps 6 on its face opposite to that secured to the cylinder head 2. The present invention provides the opposite configuration for which the bearing caps 6 are arranged on the face of the camshaft support 1 applied against the cylinder head 2. The lubricating oil is advantageously under high pressure.
[0034] Les demi-portées des chapeaux de palier 6 peuvent être solidarisés par au moins deux éléments de fixation respectivement à une demi-portée 5 de la base pour former une portée cylindrique interne solidaire de la périphérie dudit au moins un arbres à cames. Aux figures il est montré quatre portées pour l'arbre à cames, ce qui n'est pas limitatif. The half-bearings of the bearing caps 6 can be secured by at least two fasteners respectively to a half-span 5 of the base to form a internal cylindrical bearing secured to the periphery of said at least one camshaft. In the figures it is shown four bearings for the camshaft, which is not limiting.
[0035] Le passage 7 d'huile de lubrification traverse le chapeau de palier 6 par une face plane destinée à contacter la culasse 2 et supportant la demi-portée en débouchant sur la demi-portée. Les passages 7 d'huile de lubrification dans les chapeaux de palier 6 sont cachés à la figure 1 par un conduit 8 d'huile respectif mais des passages 7 d'huile peuvent être mieux vus à la figure 2 sous la référence 7 pour quelques chapeaux de palier 6. The passage 7 of lubricating oil passes through the bearing cap 6 by a flat face intended to contact the cylinder head 2 and supporting the half-scope opening on the half-scope. The passages 7 of lubricating oil in the bearing caps 6 are hidden in FIG. 1 by a respective oil duct 8, but passages 7 of oil can be better seen in FIG. 2 under reference 7 for some hats. 6.
[0036] Le passage 7 d'huile de lubrification de chaque chapeau de palier 6 traverse le chapeau de palier 6 de part en part du côté du chapeau de palier 6 portant la demi-portée vers une face opposée faisant saillie vers l'extérieur du porte-arbre 1 à cames de la face présentant l'interface 3. Le passage 7 d'huile de lubrification s'étend donc sensiblement perpendiculairement au plan de jonction de la culasse 2 et du porte-arbre 1 à cames ou avec un faible angle d'inclinaison rapport à la direction perpendiculaire à ce plan de jonction. The passage 7 of lubricating oil of each bearing cap 6 passes through the bearing cap 6 from side to side of the bearing cap 6 carrying the half-scope to an opposite face projecting outwardly of the 1-camshaft holder of the face having the interface 3. The passage 7 of lubricating oil therefore extends substantially perpendicularly to the junction plane of the cylinder head 2 and camshaft holder 1 or with a low angle inclination ratio to the direction perpendicular to this junction plane.
[0037] Le passage 7 d'huile de lubrification peut être prolongé par un conduit 8 d'huile sur la face opposée faisant saillie vers l'extérieur du porte-arbre 1 à cames de la face présentant l'interface 3. Chaque conduit 8 d'huile est destiné à pénétrer dans un puits 10 aménagé dans la culasse 2 comme il est montré à la figure 2 pour deux puits 10 mais il existe un puit pour chaque conduit 8 d'huile. The passage 7 of lubricating oil can be extended by an oil duct 8 on the opposite side protruding outwardly of the camshaft holder 1 of the face having the interface 3. Each duct 8 The oil is intended to enter a well 10 provided in the cylinder head 2 as shown in FIG. 2 for two wells 10 but there is a well for each oil line 8.
[0038] Il peut exister plusieurs types de chapeaux de palier 6 différant par leur conduit 8 d'huile et/ ou le positionnement du passage 7 d'huile sur le chapeau de palier 6. Tous les chapeaux de palier 6 peuvent présenter, sur la face opposée faisant saillie vers l'extérieur du porte-arbre 1 à cames, l'ouverture du passage 7 d'huile centré ou légèrement déporté vers l'extérieur du porte-arbre 1 à cames sur cette face. There may be several types of bearing caps 6 differing by their oil duct 8 and / or the positioning of the passage 7 of oil on the bearing cap 6. All the bearing caps 6 can present, on the opposite side projecting outwardly from the camshaft holder 1, the opening of the oil passage 7 centered or slightly offset to the outside of the camshaft holder 1 on this face.
[0039] Ainsi, la localisation des passages 7 d'huile et/ou les dimensions du conduit 8 d'huile sur les chapeaux de palier 6 peuvent différer selon la position du chapeau de palier 6 dans le porte-arbre 1 à cames. Par exemple, un porte-arbre 1 à cames peut porter quatre chapeaux de palier 6 par arbre à cames qui peuvent se succéder dans la longueur du porte-arbre 1 à cames. [0040] Sans que cela soit limitatif, quand il y a un seul arbre à cames, le premier chapeau de palier 6 de la succession peut présenter un passage plus large que ceux des autres chapeaux de palier 6 et le dernier chapeau de palier 6 peut présenter un conduit 8 d'huile plus incliné que les autres chapeaux de palier 6, les chapeaux de palier 6 intermédiaires étant sensiblement similaires. [0041 ] Toujours sans que cela soit limitatif, quand il y a deux arbres à cames, les premiers chapeaux de palier 6 des deux successions pour les deux arbres à cames peuvent présenter un passage plus large que ceux des autres chapeaux de palier 6. Seul le dernier chapeau de palier 6 d'un arbre à cames peut présenter un conduit 8 d'huile plus incliné que les autres chapeaux de palier 6, les chapeaux de palier 6 intermédiaires étant sensiblement similaires pour les deux successions. D'autres configurations sont aussi bien entendu possibles. Thus, the location of the oil passages 7 and / or the dimensions of the oil duct 8 on the bearing caps 6 may differ according to the position of the bearing cap 6 in the camshaft holder 1. For example, a camshaft holder 1 may carry four bearing caps 6 per camshaft which may succeed one another in the length of the camshaft holder 1. Without this being limiting, when there is a single camshaft, the first bearing cap 6 of the succession may have a wider passage than those of other bearing caps 6 and the last bearing cap 6 may have an oil duct 8 more inclined than the other bearing caps 6, the intermediate bearing caps 6 being substantially similar. Still without this being limiting, when there are two camshafts, the first bearing caps 6 of the two successions for the two camshafts may have a wider passage than those of the other bearing caps 6. Only the last bearing cap 6 of a camshaft may have an oil duct 8 more inclined than the other bearing caps 6, the intermediate bearing caps 6 being substantially similar for the two successions. Other configurations are of course possible.
[0042] Ainsi, le porte-arbre 1 à cames peut loger au moins deux arbres à cames. Pour chaque arbre à cames, les demi-portées 5 de la base et des chapeaux de palier 6 associés peuvent se suivre en direction longitudinale du porte-arbre 1 à cames. Les demi- portées 5 associées à un premier arbre à cames peuvent être symétriques aux demi- portées 5 d'un deuxième arbre à cames par rapport à la direction longitudinale médiane du porte-arbre 1 à cames. Ceci peut être valable pour tous les passages 7 d'huile et conduits d'huile sauf pour le conduit 8 d'huile du dernier chapeau d'huile d'une succession d'un arbre à cames qui peut être plus incliné que son vis-à-vis de la succession de l'autre arbre à cames. Thus, the camshaft holder 1 can accommodate at least two camshafts. For each camshaft, the half-bearings 5 of the base and the associated bearing caps 6 can follow in the longitudinal direction of the camshaft holder 1. The half-bearings 5 associated with a first camshaft may be symmetrical to the half-lands of a second camshaft relative to the median longitudinal direction of the camshaft carrier 1. This can be valid for all oil passages and oil ducts except for the oil line of the last oil cap of a succession of a camshaft which may be more inclined than its screw. to the succession of the other camshaft.
[0043] Il peut être prévu une interface auxiliaire 3a complétant l'interface 3 à la périphérie du porte-arbre 1 à cames, l'interface auxiliaire 3a formant un U s'intercalant entre lesdits au moins deux arbres à cames du porte-arbre 1 à cames en présentant une symétrie par rapport à la direction longitudinale médiane du porte-arbre 1 à cames. It can be provided an auxiliary interface 3a complementing the interface 3 at the periphery of the camshaft holder 1, the auxiliary interface 3a forming a U interposed between said at least two camshafts of the tree holder 1 to cams having a symmetry with respect to the longitudinal longitudinal direction of the camshaft holder 1.
[0044] L'interface auxiliaire 3a en U peut former un caisson avantageusement étanche ou rendu étanche pour des injecteurs de carburant dans le moteur à combustion interne logé dans la culasse 2 ou d'autres éléments auxiliaires du moteur. L'interface auxiliaire 3a s'applique contre une interface auxiliaire 4a portée par la culasse 2. The auxiliary interface 3a U can form a box advantageously sealed or sealed for fuel injectors in the internal combustion engine housed in the cylinder head 2 or other auxiliary elements of the engine. The auxiliary interface 3a is applied against an auxiliary interface 4a carried by the cylinder head 2.
[0045] L'invention concerne aussi un ensemble d'une culasse 2 et d'un porte-arbre 1 à cames monté sur la culasse 2, l'interface 3 du porte-arbre 1 à cames reposant contre une interface 4 de la culasse 2, des éléments de solidarisation traversant les interfaces 3, 4 du porte-arbre 1 à cames et de la culasse 2. Selon l'invention, le porte-arbre 1 à cames est tel que précédemment décrit, les chapeaux de palier 6 étant des portions du porte-arbre 1 à cames les plus internes à la culasse 2. The invention also relates to a set of a cylinder head 2 and a camshaft holder 1 mounted on the cylinder head 2, the interface 3 of the camshaft holder 1 resting against an interface 4 of the cylinder head 2, fastening elements passing through the interfaces 3, 4 of the camshaft holder 1 and the yoke 2. According to the invention, the camshaft holder 1 is such that than previously described, the bearing caps 6 being portions of the camshaft holder 1 more internal to the cylinder head 2.
[0046] Avantageusement, les portions de la culasse 2 en vis-à-vis des chapeaux de palier 6 présentent des puits 10 alignés respectivement avec un passage 7 d'huile de lubrification ou, quand le passage 7 d'huile de lubrification est prolongé par un conduit 8 d'huile, les puits 10 reçoivent en leur intérieur respectivement un conduit 8 d'huile. Advantageously, the portions of the yoke 2 vis-à-vis the bearing caps 6 have wells 10 aligned respectively with a passage 7 of lubricating oil or when the passage 7 of lubricating oil is extended by an oil duct 8, the wells 10 receive in their interior respectively an oil duct 8.
[0047] L'invention concerne aussi un procédé de fabrication d'un ensemble d'une culasse 2 et d'un porte-arbre 1 à cames tel que précédemment décrit. Le procédé comprend une étape d'usinage du porte-arbre 1 à cames et des chapeaux de palier 6 avec montage dudit au moins un arbre à cames dans le porte-arbre 1 à cames préalablement au montage du porte-arbre 1 à cames sur la culasse 2. [0048] Les chapeaux de palier 6 de même que le porte-arbre 1 à cames sont dans un état semi-fini après cet usinage. L'étape d'usinage du porte-arbre 1 à cames est suivie par une étape d'usinage de l'interface 3 du porte-arbre 1 à cames avec la culasse 2 et du passage 7 d'huile dans les chapeaux de palier 6, les chapeaux de palier 6 étant solidaires du porte-arbre 1 à cames. The invention also relates to a method of manufacturing a set of a cylinder head 2 and a camshaft holder 1 as previously described. The method comprises a step of machining the camshaft holder 1 and the bearing caps 6 with mounting said at least one camshaft in the camshaft holder 1 prior to mounting the camshaft holder 1 on the 2. The bearing caps 6 as well as the camshaft holder 1 are in a semi-finished state after this machining. The machining step of the camshaft holder 1 is followed by a step of machining the interface 3 of the camshaft holder 1 with the yoke 2 and the passage 7 of oil in the bearing caps 6 , the bearing caps 6 being integral with the camshaft holder 1.
[0049] Par état semi-fini, il est entendu un état où l'usinage du porte-arbre 1 à cames a été effectué et que restent seulement les usinages d'ajustement du porte-arbre 1 à cames à la culasse 2, c'est-à-dire principalement de l'interface 3 et des chapeaux de palier 6 notamment des conduits d'huile 8 devant pénétrer dans un puits 10 respectif aménagé dans la culasse 2. By semi-finished state, it is understood a state where the machining of the camshaft holder 1 has been carried out and that only the adjustment machining operations of the camshaft 1 cam holder to the cylinder head 2, c that is to say mainly interface 3 and bearing caps 6 including oil ducts 8 to enter a respective well 10 arranged in the cylinder head 2.
[0050] L'invention n'est nullement limitée aux modes de réalisation décrits et illustrés qui n'ont été donnés qu'à titre d'exemples. The invention is not limited to the described and illustrated embodiments which have been given only as examples.

Claims

REVENDICATIONS
Porte-arbre (1 ) à cames destiné à être fixé sur une culasse Camshaft holder (1) intended to be fixed on a cylinder head
(2) de moteur à combustion interne de véhicule automobile, une face du porte-arbre (1 ) à cames présentant à sa périphérie une interface (2) of an internal combustion engine of a motor vehicle, one face of the camshaft holder (1) having at its periphery an interface
(3) destinée à être en contact avec une interface (3) intended to be in contact with an interface
(4) de la culasse (2), le porte-arbre (1 ) à cames logeant au moins un arbres à cames, l'arbre à cames étant inséré entre une base du porte-arbre (1 ) à cames comprenant une succession de demi-portées (5) et des chapeaux de palier (6) portant chacun sur un côté une demi-portée complémentaire d'une demi-portée (5) de la base, chaque demi-portée des chapeaux de palier (6) étant solidarisée de manière amovible à une demi-portée (5) de la base, caractérisé en ce que les chapeaux de palier (6) sont solidarisés sur le porte-arbre (1 ) à cames en faisant saillie de la face présentant l'interface (3), chaque chapeau de palier (6) présentant un passage (7) d'huile de lubrification. (4) of the cylinder head (2), the camshaft holder (1) housing at least one camshaft, the camshaft being inserted between a base of the camshaft holder (1) comprising a succession of half-spans (5) and bearing caps (6) each carrying on one side a half-span complementary to a half-span (5) of the base, each half-span of the bearing caps (6) being secured removably at a half-span (5) from the base, characterized in that the bearing caps (6) are secured to the camshaft holder (1) by projecting from the face presenting the interface (3 ), each bearing cap (6) having a lubricating oil passage (7).
Porte-arbre (1 ) à cames selon la revendication 1 , dans lequel le passage (7) d'huile de lubrification de chaque chapeau de palier (6) traverse le chapeau de palier (6) de part en part du côté du chapeau de palier (6) portant la demi-portée vers une face opposée faisant saillie vers l'extérieur du porte-arbre (1 ) à cames de la face présentant l'interface (3). Camshaft carrier (1) according to claim 1, in which the passage (7) of lubricating oil of each bearing cap (6) passes through the bearing cap (6) right through to the side of the bearing cap (6). bearing (6) carrying the half-span towards an opposite face projecting outwards from the camshaft holder (1) of the face presenting the interface (3).
Porte-arbre (1 ) à cames selon la revendication 2, dans lequel le passage (7) d'huile de lubrification est prolongé par un conduit (8) d'huile sur la face opposée faisant saillie vers l'extérieur du porte-arbre (1 ) à cames de la face présentant l'interface (3). Camshaft carrier (1) according to claim 2, in which the lubricating oil passage (7) is extended by an oil conduit (8) on the opposite face projecting towards the outside of the shaft carrier (1) with cams on the face presenting the interface (3).
Porte-arbre (1 ) à cames selon l'une quelconque des revendications 1 à 3, dans lequel la localisation des passages (7) d'huile sur les chapeaux de palier (6) diffère selon la position du chapeau de palier (6) dans le porte-arbre (1 ) à cames. Camshaft carrier (1) according to any one of claims 1 to 3, in which the location of the oil passages (7) on the bearing caps (6) differs depending on the position of the bearing cap (6) in the camshaft holder (1).
Porte-arbre (1 ) à cames selon l'une quelconque des revendications précédentes, lequel loge au moins deux arbres à cames, les demi-portées Camshaft carrier (1) according to any one of the preceding claims, which houses at least two camshafts, the half-bearings
(5) de la base et des chapeaux de palier (6) associés se suivant en direction longitudinale du porte-arbre (1 ) à cames, les chapeaux de palier (7) associés à un premier arbre à cames étant symétriques aux chapeaux de palier (7) d'un deuxième arbre à cames par rapport à la direction longitudinale médiane du porte-arbre (1 ) à cames. (5) of the base and associated bearing caps (6) following each other in the longitudinal direction of the camshaft carrier (1), the bearing caps (7) associated with a first camshaft being symmetrical to the bearing caps (7) of a second camshaft relative to the median longitudinal direction of the camshaft carrier (1).
6. Porte-arbre (1 ) à cames selon la revendication précédente, dans lequel il est prévu une interface auxiliaire (3a) complétant l'interface (3) à la périphérie du porte-arbre (1 ) à cames, l'interface auxiliaire (3a) formant un U s'intercalant entre lesdits au moins deux arbres à cames du porte-arbre (1 ) à cames en présentant une symétrie par rapport à la direction longitudinale médiane du porte-arbre (1 ) à cames. 6. Camshaft holder (1) according to the preceding claim, in which there is provided an auxiliary interface (3a) completing the interface (3) at the periphery of the camshaft holder (1), the auxiliary interface (3a) forming a U interposed between said at least two camshafts of the camshaft holder (1) presenting symmetry with respect to the median longitudinal direction of the camshaft holder (1).
7. Porte-arbre (1 ) à cames selon l'une quelconque des revendications précédentes, dans lequel les demi-portées des chapeaux de palier (6) sont solidarisées par au moins deux éléments de fixation respectivement à une demi-portée (5) de la base pour former une portée cylindrique interne solidaire de la périphérie dudit au moins un arbres à cames. 7. Camshaft carrier (1) according to any one of the preceding claims, in which the half-spans of the bearing caps (6) are secured by at least two fixing elements respectively to a half-span (5) of the base to form an internal cylindrical surface secured to the periphery of said at least one camshaft.
8. Ensemble d'une culasse (2) et d'un porte-arbre (1 ) à cames monté sur la culasse (2), l'interface (3) du porte-arbre (1 ) à cames reposant contre une interface (4) de la culasse (2), des éléments de solidarisation traversant les interfaces (3, 4) du porte- arbre (1 ) à cames et de la culasse (2), caractérisé en ce que le porte-arbre (1 ) à cames est selon l'une quelconque des revendications précédentes, les chapeaux de palier (6) étant des portions du porte-arbre (1 ) à cames les plus internes à la culasse (2). 8. Assembly of a cylinder head (2) and a camshaft holder (1) mounted on the cylinder head (2), the interface (3) of the camshaft holder (1) resting against an interface ( 4) of the cylinder head (2), securing elements passing through the interfaces (3, 4) of the camshaft carrier (1) and the cylinder head (2), characterized in that the shaft carrier (1) has cams is according to any one of the preceding claims, the bearing caps (6) being portions of the camshaft holder (1) most internal to the cylinder head (2).
Ensemble selon la revendication 8, dans lequel les portions de la culasse (2) en vis-à- vis des chapeaux de palier (6) présentent des puits (10) alignés respectivement avec un passage (7) d'huile de lubrification ou, quand le passage (7) d'huile de lubrification est prolongé par un conduit (8) d'huile, les puits (10) reçoivent en leur intérieur respectivement un conduit (8) d'huile. Assembly according to claim 8, in which the portions of the cylinder head (2) facing the bearing caps (6) have wells (10) aligned respectively with a passage (7) for lubricating oil or, when the lubricating oil passage (7) is extended by an oil conduit (8), the wells (10) receive in their interior respectively an oil conduit (8).
10. Procédé de fabrication d'un ensemble d'une culasse (2) et d'un porte-arbre (1 ) à cames selon l'une quelconque des revendications 8 ou 9, comprenant l'étape d'usinage du porte-arbre (1 ) à cames et des chapeaux de palier (6) avec montage dudit au moins un arbre à cames dans le porte-arbre (1 ) à cames préalablement au montage du porte-arbre (1 ) à cames sur la culasse (2), les chapeaux de palier (6) étant dans un état semi-fini après cet usinage, cette étape étant suivie par l'étape d'usinage de l'interface (3) du porte-arbre (1 ) à cames avec la culasse (2) et des chapeaux de palier (6), les chapeaux de palier (6) étant solidaires du porte-arbre (1 ) à cames. 10. Method of manufacturing an assembly of a cylinder head (2) and a camshaft carrier (1) according to any one of claims 8 or 9, comprising the step of machining the shaft carrier (1) with cams and bearing caps (6) with mounting of said at least one camshaft in the camshaft holder (1) prior to mounting the camshaft holder (1) on the cylinder head (2) , the bearing caps (6) being in a semi-finished state after this machining, this step being followed by the step of machining the interface (3) of the camshaft carrier (1) with the cylinder head ( 2) and bearing caps (6), the bearing caps (6) being integral with the camshaft carrier (1).
PCT/FR2017/051548 2016-07-01 2017-06-15 Camshaft holder having bearing caps bored with an oil passage WO2018002468A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR112018077017-5A BR112018077017A2 (en) 2016-07-01 2017-06-15 camshaft bracket with oil-drilled bearing covers
CN201780040489.7A CN109415996B (en) 2016-07-01 2017-06-15 Camshaft support with a bearing cap perforated with oil channels
EP17735211.9A EP3478954B1 (en) 2016-07-01 2017-06-15 Camshaft holder having bearing caps bored with an oil passage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1656304 2016-07-01
FR1656304A FR3053399B1 (en) 2016-07-01 2016-07-01 CAMSHAFT HOLDER WITH BEARING CAPS PERCES OF AN OIL PASSAGE

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WO2018002468A1 true WO2018002468A1 (en) 2018-01-04

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PCT/FR2017/051548 WO2018002468A1 (en) 2016-07-01 2017-06-15 Camshaft holder having bearing caps bored with an oil passage

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CN (1) CN109415996B (en)
BR (1) BR112018077017A2 (en)
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Publication number Priority date Publication date Assignee Title
FR3090748B1 (en) * 2018-12-20 2020-12-25 Renault Sas Cylinder head comprising positioning means for a lower half-bearing

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DE102006005333A1 (en) * 2006-02-07 2007-08-16 Bayerische Motoren Werke Ag Valve drive for motor vehicle internal combustion engine has camshaft mounted in adjustable bearings in rocker cover
DE102009049464A1 (en) * 2009-10-15 2011-04-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Cylinder head cover for piston engine of motor vehicle, has radial bearing devices formed as bearing cases for bearing camshafts that are provided with multi-stage sliding cams, where bearing devices comprise bearing ring bodies
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EP3478954A1 (en) 2019-05-08
BR112018077017A2 (en) 2019-04-02
EP3478954B1 (en) 2020-04-22
FR3053399B1 (en) 2018-07-27
FR3053399A1 (en) 2018-01-05
CN109415996B (en) 2021-01-26
CN109415996A (en) 2019-03-01

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