EP3094832B1 - Internal combustion engine with cam lubrication oil wells - Google Patents

Internal combustion engine with cam lubrication oil wells Download PDF

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Publication number
EP3094832B1
EP3094832B1 EP15702536.2A EP15702536A EP3094832B1 EP 3094832 B1 EP3094832 B1 EP 3094832B1 EP 15702536 A EP15702536 A EP 15702536A EP 3094832 B1 EP3094832 B1 EP 3094832B1
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EP
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Prior art keywords
cam
sump
combustion engine
cylinder
cylinder head
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EP15702536.2A
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German (de)
French (fr)
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EP3094832A1 (en
Inventor
Olivier Midy
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RDMO SAS
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RDMO SAS
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    • 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
    • F01L1/053—Camshafts overhead type
    • 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
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/005—Other engines having horizontal cylinders

Definitions

  • the present invention relates to the field of explosion engines, and more particularly to engines whose cylinders are horizontal or inclined in the horizontal plane.
  • the cylinder head is the upper part, most often removable, a reciprocating piston engine. She closes the top of the cylinders. On some engines, the intake and exhaust valves are housed. Its shape and characteristics are always closely linked to the evolution of the engines and are more particularly determined according to the type of distribution and the shape of the combustion chamber.
  • This solution does not allow to adjust the oil level optimally: the oil overflows to fall back into the chain well.
  • this solution is not suitable for engines whose cylinders have a significant inclination of more than 10 °.
  • the solution taught by this document would involve the design of two buckets of distinct configuration, one for the cylinder inclined upwards, the other for the cylinder inclined downwards.
  • the Japanese patent JP2009 270495 discloses an engine comprising a single bucket, made between the cylinder head and the cylinder head bearing, with an oil level adjustment adapted to a single inclination of the cylinder head.
  • German patent DE102008014828 discloses a flat motor comprising a grease return system.
  • the cam is greased by projection or bubbling.
  • the problem of the prior art is that during the start and the first cam, the cam comes into contact with the pusher before being properly greased. This problem is particularly important for engines with a cylinder head that is horizontal or inclined below the horizontal plane (“head down").
  • the present invention relates, according to its most general meaning, to an explosion engine comprising at least one yoke inclined with respect to a horizontal plane and a distribution system by a camshaft in the yoke greased by a system.
  • greasing device characterized in that the lubrication of each cam is made by a bucket placed under the cam to form a local tank in which a portion of the cam is immersed, the volume of said bucket being determined by two lateral faces, and a bottom, and whose edge of at least one of the lateral faces determines a level ensuring that the top of the cam plunges.
  • each bucket is bordered laterally by two complementary lateral edges respectively forming an angle of -X ° and + X ° corresponding to the inclination of a cylinder of the engine, X corresponding to the angle inclination of the cylinder head.
  • the engine is a two-cylinder engine comprising two opposite identical yokes, the axis of the cylinders forming an angle of -X ° and + X ° respectively with respect to a horizontal plane and in that said buckets are formed of two parts extending respectively a half-bearing and the cylinder head, each bucket being bordered laterally by two complementary lateral edges respectively forming an angle of -X ° and + X °.
  • the engine comprises two opposite identical yokes and in that said buckets are formed of two parts respectively extending the half-bearing and the yoke.
  • bucket in the sense of this patent means a shell whose volume is determined by two lateral faces whose spacing is between 1.1 and 3 times the thickness of the cam, and a bottom, and whose edge at least one of the lateral faces determines a level ensuring that the top of the cam is immersed in the volume thus determined.
  • the position of the bucket relative to the cam is determined to ensure lubrication of the top of the cam without the base diameter of the cam enters the oil contained in the bucket.
  • the rolls have an inclination of 25 °.
  • each bucket is formed of two complementary parts.
  • each bucket is bordered laterally by two segments forming respectively an angle of -X ° and + X ° corresponding to the inclination of the cylinder, X corresponding to the angle of inclination of the cylinder, between 0 and 45 °.
  • the invention is described with reference to a flat two-cylinder engine having an inclination of 25 °, in the longitudinal direction of the vehicle, in this case a motorcycle.
  • the front cylinder is inclined at -25 °, its head down, and the rear cylinder is inclined + 25 °, its head up.
  • the two yokes (1, 2) are strictly identical and simply returned, and not symmetrical with respect to the transverse median plane. This reduces the number of parts.
  • the distribution is ensured by an intake camshaft (3) and an exhaust camshaft (4) controlling the cams (5, 6, 7, 8) actuating pushers (9, 10; 11, 12) in known manner.
  • cam shafts are guided in rotation by bearings formed by semi-cylindrical recesses formed on the cylinder head and complementary semi-cylindrical recesses formed on the upper half-bearing (13).
  • the half-bearing (13) is constituted by a foundry piece matched with the cylinder head (1) and machined simultaneously. Its positioning is ensured by cylindrical centering sleeves.
  • the half-bearing (13) is fixed on the cylinder head by screws (14 to 22).
  • the half-bearing (13) further comprises in its center a borehole (23) to allow access to the candle. It comprises a fixing zone (24) for fixing a chain shoe.
  • Each bucket (25 to 28) is formed of two complementary parts. Each bucket (25 to 28) is laterally bordered by two segments respectively forming an angle of -25 ° and + 25 ° corresponding to the inclination of the cylinder.
  • the angle of 25 ° is mentioned by way of example, but does not constitute a limitation.
  • the inclination can go up to 45 ° and be at least 0 °, for horizontal cylinders.
  • One of said parts of the bucket is constituted by an extension of the half-bearing (13), the other of said parts of the bucket is constituted by an extension of the yoke (1).
  • the lateral edge of the portion extending the half-bearing forms an angle of 25 °;
  • the lateral edge of the part extending the bolt forms an angle of -25 °.
  • This configuration makes the cylinder heads completely identical while ensuring that the lubrication adjustment is correct for both the cams in the cylinder head and for the cams in the cylinder head. low. In one case, it will be one of the side edges that will adjust the height of the oil level, and in the other case it will be the additional side edge that will adjust the height of the oil level. oil, as illustrated by the figures 2 and 3 .
  • the oil level (32, 33) of the front yoke (1) is adjusted by the edge (34, 35) corresponding to the portion of the bucket extending the half-bearing (13).
  • the oil is retained by the side of the bucket.
  • the oil level (36, 37) of the rear cylinder head is adjusted by the edge (38, 39) corresponding to the portion of the trough extending the cylinder head (2).
  • the oil is retained by the side of the bucket, on the part extending the half-bearing.
  • the position of the bucket relative to the cam is determined to ensure lubrication of the top (30) of the cam without the base diameter (31) of the cam enters the oil contained in the bucket.

Description

Domaine de l'inventionField of the invention

La présente invention concerne le domaine des moteurs à explosions, et plus particulièrement les moteurs dont les cylindres sont horizontaux ou inclinée sous le plan horizontal.The present invention relates to the field of explosion engines, and more particularly to engines whose cylinders are horizontal or inclined in the horizontal plane.

Etat de la techniqueState of the art

La culasse est la partie supérieure, le plus souvent démontable, d'un moteur à pistons alternatifs. Elle ferme le haut des cylindres. Sur certains moteurs, les soupapes d'admission et d'échappement y sont logées. Sa forme et ses caractéristiques sont toujours étroitement liées à l'évolution des moteurs et sont plus particulièrement déterminées en fonction du type de distribution et de la forme de la chambre de combustion.The cylinder head is the upper part, most often removable, a reciprocating piston engine. She closes the top of the cylinders. On some engines, the intake and exhaust valves are housed. Its shape and characteristics are always closely linked to the evolution of the engines and are more particularly determined according to the type of distribution and the shape of the combustion chamber.

On connaît dans l'état de la technique la demande de brevet japonaise JP 2002 021989 décrivant un moteur à explosion dont la culasse présentant des augets pour le graissage des cames. Ces augets sont délimités par la culasse et la couvre-culasse.It is known in the state of the art the Japanese patent application JP 2002 021989 describing an internal combustion engine whose cylinder head has buckets for lubricating the cams. These buckets are delimited by the breech and the cylinder head cover.

Cette solution ne permet pas de régler le niveau d'huile de manière optimale : l'huile déborde pour retomber dans le puits de chaine. De plus, cette solution n'est pas adaptée à des moteurs dont les cylindres présentent une inclinaison significative, de plus de 10°. La solution enseignée par ce document impliquerait la conception de deux augets de configuration distincte, l'une pour le cylindre incliné vers le haut, l'autre pour le cylindre incliné vers le bas.This solution does not allow to adjust the oil level optimally: the oil overflows to fall back into the chain well. In addition, this solution is not suitable for engines whose cylinders have a significant inclination of more than 10 °. The solution taught by this document would involve the design of two buckets of distinct configuration, one for the cylinder inclined upwards, the other for the cylinder inclined downwards.

Le brevet japonais JP2009 270495 décrit un moteur comprenant un auget unique, réalisé entre la culasse et le palier de culasse, avec un réglage du niveau d'huile adapté à une seule inclinaison de la culasse.The Japanese patent JP2009 270495 discloses an engine comprising a single bucket, made between the cylinder head and the cylinder head bearing, with an oil level adjustment adapted to a single inclination of the cylinder head.

Le brevet allemand DE102008014828 décrit un moteur à plat comprenant un système de retour de graissage.The German patent DE102008014828 discloses a flat motor comprising a grease return system.

D'autres solutions de graissage sont décrites dans les brevets JP S59 226217 , EP0821144 , FR2464364 ou EP0377829 avec des augets configurés pour un seul angle d'inclinaison du cylindre.Other greasing solutions are described in the patents JP S59 226217 , EP0821144 , FR2464364 or EP0377829 with buckets configured for a single angle of inclination of the cylinder.

Inconvénient de l'artDisadvantage of art

Dans l'art antérieur, la came est graissée par projection ou barbotage. Le problème de l'art antérieur est que lors du démarrage et du premier tour de came, la came vient en contact avec le poussoir avant d'avoir été correctement graissé. Ce problème est particulièrement important pour les moteurs dont la culasse est horizontale ou inclinée en-dessous du plan horizontale (« tête en bas »).In the prior art, the cam is greased by projection or bubbling. The problem of the prior art is that during the start and the first cam, the cam comes into contact with the pusher before being properly greased. This problem is particularly important for engines with a cylinder head that is horizontal or inclined below the horizontal plane ("head down").

En particulier, pour un moteur bicylindre, les solutions de l'art antérieur ne permettent pas de répondre au problème du graissage des cames du cylindre incliné vers le bas et du cylindre incliné vers le haut, avec un même type d'auget.In particular, for a twin-cylinder engine, the solutions of the prior art do not make it possible to respond to the problem of lubricating the cams of the cylinder inclined downwards and the cylinder inclined upwards, with the same type of bucket.

Solution apportée par l'inventionSolution provided by the invention

Afin de remédier à ces inconvénients, la présente invention concerne selon son acception la plus générale un moteur à explosion comportant au moins une culasse inclinée par rapport à un plan horizontal et un système de distribution par un arbre à came dans la culasse graissé par un système de graissage, caractérisé en ce que le graissage de chaque came est réalisé par un auget placé sous la came pour former un réservoir local dans lequel plonge une partie de la came, le volume dudit auget étant déterminé par deux faces latérales, et un fond, et dont le bord de l'une au moins des faces latérales détermine un niveau assurant que le sommet de la came plonge dans le volume ainsi déterminée et en ce que chaque auget est bordé latéralement par deux bords latéraux complémentaires formant respectivement un angle de -X° et de +X° correspondant à l'inclinaison d'un cylindre du moteur, X correspondant à l'angle d'inclinaison de la culasse.In order to remedy these drawbacks, the present invention relates, according to its most general meaning, to an explosion engine comprising at least one yoke inclined with respect to a horizontal plane and a distribution system by a camshaft in the yoke greased by a system. greasing device, characterized in that the lubrication of each cam is made by a bucket placed under the cam to form a local tank in which a portion of the cam is immersed, the volume of said bucket being determined by two lateral faces, and a bottom, and whose edge of at least one of the lateral faces determines a level ensuring that the top of the cam plunges. in the volume thus determined and in that each bucket is bordered laterally by two complementary lateral edges respectively forming an angle of -X ° and + X ° corresponding to the inclination of a cylinder of the engine, X corresponding to the angle inclination of the cylinder head.

De préférence, le moteur est un moteur bicylindre comprenant deux culasses identiques opposées, l'axe des cylindres formant un angle respectivement de -X° et de +X° par rapport à un plan horizontale et en ce que lesdits augets sont formés de deux parties prolongeant respectivement un demi-palier et la culasse, chaque auget étant bordé latéralement par deux bords latéraux complémentaires formant respectivement un angle de -X° et de +X°.Preferably, the engine is a two-cylinder engine comprising two opposite identical yokes, the axis of the cylinders forming an angle of -X ° and + X ° respectively with respect to a horizontal plane and in that said buckets are formed of two parts extending respectively a half-bearing and the cylinder head, each bucket being bordered laterally by two complementary lateral edges respectively forming an angle of -X ° and + X °.

De préférence, le moteur comprend deux culasses identiques opposées et en ce que lesdits augets sont formés de deux parties prolongeant respectivement le demi-palier et la culasse.Preferably, the engine comprises two opposite identical yokes and in that said buckets are formed of two parts respectively extending the half-bearing and the yoke.

On entend par « auget » au sens du présent brevet une coquille dont le volume est déterminé par deux faces latérales dont l'écartement est compris entre 1,1 et 3 fois l'épaisseur de la came, et un fond, et dont le bord de l'une au moins des faces latérales détermine un niveau assurant que le sommet de la came plonge dans le volume ainsi déterminée.The term "bucket" in the sense of this patent means a shell whose volume is determined by two lateral faces whose spacing is between 1.1 and 3 times the thickness of the cam, and a bottom, and whose edge at least one of the lateral faces determines a level ensuring that the top of the cam is immersed in the volume thus determined.

De préférence, la position de l'auget par rapport à la came est déterminée pour garantir le graissage du sommet de la came sans toutefois que le diamètre de base de la came ne pénètre dans l'huile contenue dans l'auget.Preferably, the position of the bucket relative to the cam is determined to ensure lubrication of the top of the cam without the base diameter of the cam enters the oil contained in the bucket.

Avantageusement, les cylindres présente une inclinaison de 25°.Advantageously, the rolls have an inclination of 25 °.

De préférence, chaque auget est formé de deux parties complémentaires.Preferably, each bucket is formed of two complementary parts.

Selon une variante avantageuse, chaque auget est bordé latéralement par deux segments formant respectivement un angle de -X° et de +X° correspondant à l'inclinaison du cylindre, X correspondant à l'angle d'inclinaison du cylindre, compris entre 0 et 45°.According to an advantageous variant, each bucket is bordered laterally by two segments forming respectively an angle of -X ° and + X ° corresponding to the inclination of the cylinder, X corresponding to the angle of inclination of the cylinder, between 0 and 45 °.

Description détaillée d'un exemple non limitatif de réalisationDetailed description of a nonlimiting example of embodiment

La présente invention sera mieux comprise à la lecture de la description qui suit, concernant un exemple non limitatif de réalisation se référant aux dessins annexés où :

  • la figure 1 représente une vue de trois-quarts avant d'une culasse sans couvre-culasse
  • les figures 2 et 3 représentent des vues en détail en profil des augets respectivement de la culasse avant et de la culasse arrière d'un moteur bicylindre incliné dans le sens longitudinal.
The present invention will be better understood on reading the description which follows, relating to a nonlimiting exemplary embodiment with reference to the appended drawings in which:
  • the figure 1 represents a three-quarter front view of a cylinder head without a cylinder head cover
  • the figures 2 and 3 are detailed views in profile of the buckets respectively of the front cylinder head and the rear cylinder head of a longitudinally inclined twin-cylinder engine.

L'invention est décrite en référence à un moteur bicylindre à plat présentant une inclinaison de 25°, dans le sens longitudinal du véhicule, en l'occurrence une motocyclette. Le cylindre avant est incliné de -25°, sa tête étant en bas, et le cylindre arrière est incliné de +25°, sa tête étant vers le haut. Les deux culasses (1, 2) sont strictement identiques et simplement retournées, et non pas symétriques par rapport au plan médian transversal. Ceci permet de réduire le nombre de pièces.The invention is described with reference to a flat two-cylinder engine having an inclination of 25 °, in the longitudinal direction of the vehicle, in this case a motorcycle. The front cylinder is inclined at -25 °, its head down, and the rear cylinder is inclined + 25 °, its head up. The two yokes (1, 2) are strictly identical and simply returned, and not symmetrical with respect to the transverse median plane. This reduces the number of parts.

La distribution est assurée par un arbre à came d'admission (3) et un arbre à came d'échappement (4) commandant des cames (5, 6 ; 7, 8) actionnant des poussoirs (9, 10 ; 11, 12) de manière connue.The distribution is ensured by an intake camshaft (3) and an exhaust camshaft (4) controlling the cams (5, 6, 7, 8) actuating pushers (9, 10; 11, 12) in known manner.

Les arbres à came sont guidés en rotation par des paliers formés par des évidements semi-cylindriques formés sur la culasse et des évidements semi-cylindriques complémentaires formés sur le demi-palier supérieur (13).The cam shafts are guided in rotation by bearings formed by semi-cylindrical recesses formed on the cylinder head and complementary semi-cylindrical recesses formed on the upper half-bearing (13).

Le demi-palier (13) est constitué par une pièce de fonderie appariée avec la culasse (1) et usinée simultanément. Son positionnement est assuré par des douilles de centrage cylindrique. Le demi-palier (13) est fixé sur la culasse par des vis (14 à 22). Le demi-palier (13) comporte par ailleurs en son centre un forage (23) pour permettre l'accès à la bougie. Il comporte une zone de fixation (24) pour la fixation d'un patin de chaîne.The half-bearing (13) is constituted by a foundry piece matched with the cylinder head (1) and machined simultaneously. Its positioning is ensured by cylindrical centering sleeves. The half-bearing (13) is fixed on the cylinder head by screws (14 to 22). The half-bearing (13) further comprises in its center a borehole (23) to allow access to the candle. It comprises a fixing zone (24) for fixing a chain shoe.

Le graissage des cames (5 à 8) est assuré par barbotage dans des augets (25 à 28).The greasing of the cams (5 to 8) is ensured by bubbling in buckets (25 to 28).

Chaque auget (25 à 28) est formé de deux parties complémentaires. Chaque auget (25 à 28) est bordé latéralement par deux segments formant respectivement un angle de -25° et de +25° correspondant à l'inclinaison du cylindre. L'angle de 25° est mentionné à titre d'exemple, mais ne constitue pas une limitation. L'inclinaison peut aller jusqu'à 45° et être au minimum de 0°, pour des cylindres horizontaux.Each bucket (25 to 28) is formed of two complementary parts. Each bucket (25 to 28) is laterally bordered by two segments respectively forming an angle of -25 ° and + 25 ° corresponding to the inclination of the cylinder. The angle of 25 ° is mentioned by way of example, but does not constitute a limitation. The inclination can go up to 45 ° and be at least 0 °, for horizontal cylinders.

L'une desdites parties de l'auget est constituée par un prolongement du demi-palier (13), l'autre desdites parties de l'auget est constituée par un prolongement de la culasse (1). Le bord latéral de la partie prolongeant le demi-palier forme un angle de 25° ; Le bord latéral de la partie prolongeant la culasse forme un angle de -25°. Ainsi, l'un des segments latéraux sera toujours horizontal quelque soit le cylindre sur lequel est monté la culasse.One of said parts of the bucket is constituted by an extension of the half-bearing (13), the other of said parts of the bucket is constituted by an extension of the yoke (1). The lateral edge of the portion extending the half-bearing forms an angle of 25 °; The lateral edge of the part extending the bolt forms an angle of -25 °. Thus, one of the lateral segments will always be horizontal whatever the cylinder on which the cylinder head is mounted.

Cette configuration permet de rendre les culasses totalement identiques tout en assurant que le réglage du graissage soit correct tant pour les cames situées dans la culasse haute que pour les cames situées dans la culasse basse. Dans l'un des cas, ce sera l'un des bords latéraux qui assurera le réglage de la hauteur du niveau d'huile, et dans l'autre cas ce sera le bord latéral complémentaire qui assurera le réglage de la hauteur du niveau d'huile, comme illustré par les figures 2 et 3.This configuration makes the cylinder heads completely identical while ensuring that the lubrication adjustment is correct for both the cams in the cylinder head and for the cams in the cylinder head. low. In one case, it will be one of the side edges that will adjust the height of the oil level, and in the other case it will be the additional side edge that will adjust the height of the oil level. oil, as illustrated by the figures 2 and 3 .

Dans la figure 2, le niveau d'huile (32, 33) de la culasse avant (1) est réglé par le bord (34, 35) correspondant à la partie de l'auget prolongeant le demi-palier (13). Dans la partie complémentaire, l'huile est retenue par le flanc de l'auget.In the figure 2 , the oil level (32, 33) of the front yoke (1) is adjusted by the edge (34, 35) corresponding to the portion of the bucket extending the half-bearing (13). In the complementary part, the oil is retained by the side of the bucket.

Dans la figure 3, le niveau d'huile (36, 37) de la culasse arrière est réglé par le bord (38, 39) correspondant à la partie de l'auget prolongeant la culasse (2). Dans la partie complémentaire, l'huile est retenue par le flanc de l'auget, sur la partie prolongeant le demi-palier.In the figure 3 , the oil level (36, 37) of the rear cylinder head is adjusted by the edge (38, 39) corresponding to the portion of the trough extending the cylinder head (2). In the complementary part, the oil is retained by the side of the bucket, on the part extending the half-bearing.

La position de l'auget par rapport à la came est déterminé pour garantir le graissage du sommet (30) de la came sans toutefois que le diamètre de base (31) de la came ne pénètre dans l'huile contenue dans l'auget.The position of the bucket relative to the cam is determined to ensure lubrication of the top (30) of the cam without the base diameter (31) of the cam enters the oil contained in the bucket.

Claims (6)

  1. A combustion engine comprising at least one cylinder head inclined with respect to a horizontal plane and a distribution system by means of a camshaft in the cylinder head lubricated by a lubrication system, the lubrication of each cam (5 to 8) being performed by a sump (25 to 28) placed under the cam in order to form a local reservoir in which part of the cam is immersed, the volume of said sump being determined by two lateral faces, and a bottom, and wherein the edge of at least one of the lateral faces determines a level ensuring that the top of the cam is immersed in the volume thus determined, the engine being characterised in that each sump (25 to 28) is bordered laterally by two complementary lateral edges (34, 35; 38, 39) forming respectively an angle of -X° and +X° corresponding to the inclination of a cylinder of the engine, X corresponding to the angle of inclination of the cylinder head (1, 2).
  2. A combustion engine according to the main claim, characterised in that the engine is a two-cylinder engine comprising two opposite identical cylinder heads, the axis of the cylinders forming an angle respectively of -X° and +X° with respect to a horizontal plane, and in that said sumps (25 to 28) are formed by two parts respectively extending a half-bearing and the cylinder head, each sump (25 to 28) being bordered laterally by two complementary lateral edges (34, 35; 38, 39) forming respectively and angle of -X° and +X°.
  3. A combustion engine according to claim 1 or claim 2, characterised in that the position of the sump with respect to the cam is determined so as to guarantee the lubrication of the top (30) of the cam without however the base diameter (31) of the cam entering the oil contained in the sump.
  4. A combustion engine according to claim 2, characterised in that it comprises opposite cylinders having an inclination of 25° with respect to the horizontal plane.
  5. A combustion engine according to the main claim, characterised in that each sump (25 to 28) is formed by two complementary parts.
  6. A combustion engine according to the main claim, characterised in that the volume of said sump is determined by two lateral faces, the separation of which is between 1.1 and 3 times the thickness of the cam.
EP15702536.2A 2014-01-13 2015-01-08 Internal combustion engine with cam lubrication oil wells Active EP3094832B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1450242A FR3016409B1 (en) 2014-01-13 2014-01-13 EXPLOSION ENGINE COMPRISING CAM LUBRICATION AUGETS
PCT/FR2015/050030 WO2015104499A1 (en) 2014-01-13 2015-01-08 Internal combustion engine comprising cam lubrication troughs

Publications (2)

Publication Number Publication Date
EP3094832A1 EP3094832A1 (en) 2016-11-23
EP3094832B1 true EP3094832B1 (en) 2017-11-29

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EP15702536.2A Active EP3094832B1 (en) 2014-01-13 2015-01-08 Internal combustion engine with cam lubrication oil wells

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EP (1) EP3094832B1 (en)
JP (1) JP6484837B2 (en)
CN (1) CN106030055A (en)
FR (1) FR3016409B1 (en)
WO (1) WO2015104499A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE443021B (en) * 1979-09-03 1986-02-10 Yanmar Diesel Engine Co FORBRENNINGSMOTOR
JPS59226217A (en) * 1983-06-07 1984-12-19 Honda Motor Co Ltd Lubricating device of valve mechanism in internal- combustion engine
JP2911463B2 (en) * 1988-12-09 1999-06-23 ヤマハ発動機株式会社 Lubrication structure of valve train
JPH04107427U (en) * 1991-02-28 1992-09-17 富士重工業株式会社 Cam lubrication system for horizontal DOHC engine
JPH04116613U (en) * 1991-03-28 1992-10-19 ダイハツ工業株式会社 engine lubrication system
JP3235159B2 (en) * 1992-01-31 2001-12-04 いすゞ自動車株式会社 Lubrication system for V-type OHV engine
JPH074806U (en) * 1993-06-24 1995-01-24 富士重工業株式会社 Direct acting valve mechanism
DE19630192C2 (en) * 1996-07-26 1998-05-28 Porsche Ag Cylinder head arrangement of an internal combustion engine
JP2002021989A (en) * 2000-07-05 2002-01-23 Yamaha Motor Co Ltd Cooling apparatus of engine for motorcycle
EP1170480B1 (en) * 2000-07-05 2007-01-24 Yamaha Hatsudoki Kabushiki Kaisha Motorcycle, especially scooter type motorcycle
DE102008014828A1 (en) * 2008-03-18 2009-09-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
JP5135052B2 (en) * 2008-05-08 2013-01-30 ヤマハ発動機株式会社 Engine and scooter type motorcycles
CN202970848U (en) * 2012-12-10 2013-06-05 李斯特技术中心（上海）有限公司 Oil baffle plate for preventing lubricating oil of camshaft and valve mechanism from splashing to oil-gas separator

Also Published As

Publication number Publication date
JP6484837B2 (en) 2019-03-20
EP3094832A1 (en) 2016-11-23
CN106030055A (en) 2016-10-12
WO2015104499A1 (en) 2015-07-16
JP2017502212A (en) 2017-01-19
FR3016409A1 (en) 2015-07-17
FR3016409B1 (en) 2018-11-16

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