EP0068336B1 - Moteur à combustion interne, à quatre-temps, à deux cylindres du type boxer, en particulier pour motocyclette et refroidi par le courant d'air causé par le déplacement - Google Patents

Moteur à combustion interne, à quatre-temps, à deux cylindres du type boxer, en particulier pour motocyclette et refroidi par le courant d'air causé par le déplacement Download PDF

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Publication number
EP0068336B1
EP0068336B1 EP82105324A EP82105324A EP0068336B1 EP 0068336 B1 EP0068336 B1 EP 0068336B1 EP 82105324 A EP82105324 A EP 82105324A EP 82105324 A EP82105324 A EP 82105324A EP 0068336 B1 EP0068336 B1 EP 0068336B1
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EP
European Patent Office
Prior art keywords
crank
shaft
cylinder
valves
boxer engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82105324A
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German (de)
English (en)
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EP0068336A1 (fr
Inventor
Jiri Dipl.-Ing. Seidl
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Priority to DE8383112438T priority Critical patent/DE3273260D1/de
Publication of EP0068336A1 publication Critical patent/EP0068336A1/fr
Application granted granted Critical
Publication of EP0068336B1 publication Critical patent/EP0068336B1/fr
Expired legal-status Critical Current

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    • 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
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • 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
    • 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
    • F01L1/022—Chain drive
    • 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
    • F01L1/024—Belt drive
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F02B75/243—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft 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
    • F01L1/053—Camshafts overhead type
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/20—SOHC [Single overhead camshaft]
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to a two-cylinder four-stroke boxer engine of a type according to the features specified in the preamble of claim 1.
  • a known boxer engine of this type according to D E-A No. 2703520 has a relatively jagged outer shape, which is derived in particular from the arrangement of the valves and their drives. This is because the intermediate shaft for driving the two overhead cam shafts is arranged above the crankshaft and the chain and belt drives extend with separate covers arranged at a distance from the cylinders and cylinder heads to control housings projecting from the cylinder head.
  • the arrangement of parallel intake and exhaust valves also contributes to the asymmetrical and jagged design of this boxer engine.
  • the housing parts which protrude considerably beyond the basic contour of the cylinders and cylinder heads, also result in high construction costs with a correspondingly high weight.
  • the object of the invention is to avoid the aforementioned disadvantages and to create a boxer engine on the basis of the known design, which has a compact overall structure with low construction costs and light weight, favorable conditions for good ground clearance when installed in motorcycles, an efficient and speed-resistant control system V-valve arrangement, a largely smooth, easy-to-clean and appealing outer shape and finally, in the case of airstream air cooling, has a favorable cooling air flow on the cylinders and cylinder heads.
  • the invention provides an arrangement according to the characterizing part of patent claim 1.
  • a known boxer engine according to FR-A No. 818196 already has a pump wheel of a lubricating oil pump on a shaft below the crankshaft.
  • this shaft is designed as a camshaft for direct actuation of valves arranged laterally in the combustion chamber and guided in the cylinders.
  • the design of this design differs so significantly from that of the invention that no suggestion for the overall combination of the features of the invention can be derived from it.
  • the arrangement of the intake valves according to claim 4 results in a favorable position for the combustion process and maintenance of the spark plugs in the center of the combustion chamber or on the top of the cylinder heads, without reducing the aforementioned advantages.
  • the features of claim 8 accordingly include a corresponding weight and space-saving design and arrangement of the balancing masses.
  • the feature of claim 11 results in a space requirement of the spark plug, which avoids an excessive distance between the inlet valves and their valve springs.
  • the intermediate shaft 4 drives both a lubricating oil pump 12, of which a pump wheel 12 ′ is fastened on the intermediate shaft 4, and also two chain drives 13, each for an overhead cam shaft 14.
  • a lubricating oil pump 12 of which a pump wheel 12 ′ is fastened on the intermediate shaft 4
  • two chain drives 13 each for an overhead cam shaft 14.
  • the filter insert 16 of which is accessible for maintenance work through an internal cover 17.
  • the cover 17, the toothed belt drive 7, 8 and 9 and the generator 6 are protected against environmental influences by a largely smooth end wall cover 18, which at the same time favors the cleaning of the end face of the crankcase 2.
  • the flywheel 5 is framed by a mounting flange 19 for the connection of a transmission housing, not shown.
  • a circumferential fastening flange 20 with a number of fastening eyes 21 for fastening screws 22 is integrally formed on the top of the crankcase 2, with which a frame sheet metal hollow body 23 is screwed.
  • a crankcase ventilation opening 24 opens out.
  • the frame sheet metal hollow body 23 connects the crankcase 2 on a broad, rigid base to a control head 25 of a motorcycle.
  • the frame sheet metal hollow body 23 On its end face, the frame sheet metal hollow body 23 carries an intake air filter 26, through which the filtered intake air flows through openings 27 into the interior of the frame sheet metal hollow body 23.
  • This serves as an intake chamber for the combustion air of the engine and contains intake pipes 28 which are matched in length and which each feed the combustion air to a carburetor 29.
  • the carburetors 29 are partially inside indentations 30 of the hollow sheet metal body 23, which has sealed through openings 31 for the passage of the intake pipes 28 inside the indentations 30.
  • a cylinder 32 is flanged on both sides of the crankcase 2, and a cylinder head 33, each with a cylinder head cover 34, is flanged to each of these.
  • Cylinder 32, cylinder head 33 and cylinder head cover 34 have numerous cooling fins 35 for airflow air cooling. It en hold t quantities that a tunnel 36 for receiving the chain drives 13, as seen from the intermediate shaft 4 in the crankcase 2 to the camshaft 14 in the cylinder heads 33- in the driving direction - extend to the rear of the cylinder 32 and the cylinder heads 33rd
  • the chain drives 13 have a 1: 1 transmission, so that small sprockets 13 'can be used both on the intermediate shaft 4 and on the camshafts 14.
  • valve control for two intake valves 37 and one exhaust valve 38 by means of three rocker arms 39 as transmission elements from the camshaft 14 to the valves 37 and 38 has a somewhat larger side projection, so that the cylinder head cover 34 has a protrusion-free outer shape rounded on all sides have. This favors both their external appearance and their easy cleaning as well as the small overall width of the boxer engine and also the motorcycle equipped with it (Fig. 2 and 3).
  • valves 37 and 38 are arranged in the vertical V position.
  • the two inlet valves 37 lie parallel to one another, corresponding to a V-leg, which is determined by the plane of the two inlet valves 37 and, as viewed towards the end of the inlet valve 37, has an upward inclination of approximately 37 °.
  • the V-leg determined by the outlet valves 38 on the other hand, has a corresponding downward inclination of approximately 15 °.
  • the camshafts are each in an angle bisecting position within the approx. 52 ° V position of valves 37 and 38.
  • the rocker arms 39 for driving a valve 37 or 38 are rotatably arranged on bearing axes 40.
  • Their pivot bearing sections 41 are arranged eccentrically to their firmly clamped axle journals 42 for the valve clearance adjustment (FIGS. 2 and 5).
  • Their axle journals 42 can be clamped non-rotatably in bearing seats 44 of the cylinder head 33 which can be clamped by means of screws 43.
  • the bearing axles 40 have a key profile formed on an accessible front end, which cannot be seen in the drawing. An inner profile is preferred because it does not require space and saves weight as a material recess. The valve control thus requires little space and construction and does not contain any additional moving parts for the valve clearance adjustment.
  • valve plates 37 'and 38' of the inlet 37 and the outlet valves 38 are almost tangentially close to the associated circular contour 32 'of the associated cylinder 32 and at a relatively close distance between the valve plate 37' and each valve plate 38 '.
  • the spark gap of the spark plug 45 is located centrally between the valves 37 and 38 in the combustion chamber 46.
  • a large squeeze area 47 can be formed enables a pinch gap with a favorable influence on the combustion process in cooperation with a flat bottom portion of a piston 48.
  • the spark plug 45 is arranged at a steeper inclination than the inlet valves 37 in the vertical plane 49 together with the outlet valve 38.
  • the installation space requirement of the spark plug comes as a result not between the space requirements of the valve springs 50 of the inlet valves 37.
  • the spark plugs and their electrical connections are particularly conveniently accessible for maintenance.
  • an open horizontal cooling air duct 51 is formed, as seen in the direction of travel. This ends at its end opposite to the direction of travel in a vertical outflow shaft 52 which is arranged in front of the tunnel 36 of the chain drive 13 and is open at the top and bottom.
  • a favorable space-saving arrangement results from the valve arrangement described above also for the intake manifold 28 'with the carburetors 29 and for the exhaust pipes 53. While the suction system on the top of the engine rests closely on the frame sheet metal hollow body 23 in a space-saving manner and therefore has a small width there is sufficient space available for routing the exhaust pipes 53 with relatively large, low flow resistance radii, without impairing the ground - and the inclined freedom for motorcycle riding.
  • the overall structure of the two-cylinder, four-stroke boxer engine according to the invention results, especially for use in motorcycles, in a summation of mutually complementary advantages with regard to high performance, effective cooling, good running properties, low weight and construction expenditure, small space requirement and appealing external shape.
  • most of these advantages also come into play in stationary and / or encapsulated applications with forced air or liquid cooling.

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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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Claims (13)

1. Moteur Boxer (1) à quatre temps et à deux cylindres, notamment refroidi par le vent de marche, pour motocyclette, comportant:
- pour chaque cylindre (32), un arbre à cames (14) à démultiplication 1:2 par rapport à l'arbre de vilebrequin (3) disposé horizontalement, au-dessus de l'arbre de vilebrequin et parallèlement à ce dernier;
- un arbre secondaire (4) parallèle à l'arbre de vilebrequin (3), avec démultiplication de 1:2 par rapport à la vitesse de rotation de l'arbre de vilebrequin, ces arbres secondaires étant entraînés chacun par l'intermédiaire d'une transmission à chaîne ou à courroie dans le rapport 1:1:
- des mécanismes à chaîne ou à courroie (13) placés, en direction de la marche, derrière les cylindres (32), et
- des soupapes (37 et 38) actionnées par levier basculant (39), moteur caractérisé par une disposition dans laquelle:
- l'arbre secondaire (4) est situé au-dessous de l'arbre de vilebrequin (3) ;
- l'entraînement de l'arbre secondaire (4) est placé, en direction de la marche, sur l'extrémité antérieure de l'arbre de vilebrequin;
- une roue de pompe (12') d'une pompe à huile de graissage (12) est disposée au-dessous de l'arbre de vilebrequin sur l'arbre secondaire (4) ;
- le mécanisme à chaîne ou à courroie (13) est placé dans des tunnels (36) du cylindre (32) et des têtes de cylindre (33);
- les soupapes (37 et 38) sont en position en V dans des plans verticaux par rapport à l'arbre de cames (14), lequel est placé dans un espace en V déterminé par les soupapes (37 et 38);
- les conduites d'aspiration (28) et d'échappement des gaz (53) s'étendent, à partir des têtes de cylindre (33), verticalement vers le haut et vers le bas.
2. Moteur Boxer suivant la revendication 1, caractérisé en ce que les soupapes (37 et 38) sont pivotées dans une position en V, chacune dans son plan vertical suivant un angle par rapport à l'horizontale, les soupapes d'échappement (38) sont inclinées sur un angle d'environ 0 à 20° vers le bas, et les soupapes d'admission (37) sont inclinées vers le haut sur un angle d'environ 30 à 50° vers le haut, vues à partir du plateau de soupape vers leur extrémité de tige, vers l'horizontale du plan en question.
3. Moteur Boxer suivant l'une des revendications 1 ou 2, caractérisé en ce que, pour chaque cylindre (32), deux soupapes d'admission (37) parallèles entre elles sont disposées de chaque côté du plan vertical (49) de la soupape d'échappement (38), dans les plans verticaux de même espacement.
4. Moteur Boxer suivant la revendication 3, caractérisé en ce que:
- les soupapes d'admission (37) présentent une distance libre de leurs plateaux de soupape;
- dans cette distance est prévu un passage fileté, dans le plan vertical (49) de la soupape d'échappement (38), pour une bougie d'allumage (45) libre vers les anneaux de siège des soupapes d'admission (37), et
- les anneaux de siège (37') des soupapes d'admission (37), dans leur position de fermeture, sont tangents au diamètre horizontal (32") du contour circulaire (32') du cylindre en question ou sont engagés par-dessus celui-ci.
5. Moteur Boxer suivant l'une des revendications 1 à 4, caractérisé en ce que:
- les axes de palier (40) du levier basculant (39) présententchacun, dans leur tourillon axial (42) à poste fixe dans la tête de cylindre, une portion de palier de rotation excentrique (41 ) pour le levier basculant (39);
- au moins l'un des tourillons axiaux (42) est pourvu d'un dispositif de serrage de blocage pour immobiliser la position de rotation de l'axe de palier (40), et
- sur chaque axe de palier (40), sur au moins un côté frontal, est formée, en une seule pièce, une section transversale de blocage.
6. Moteur Boxer suivant l'une des revendications 1 à 5, comportant des guidages d'air de refroidissement dans la tête de cylindre pour le refroidissement par le vent de la marche, moteur caractérisé en ce que:
- dans l'espace en V entre les soupapes (37 et 38) est disposé un canal d'air de refroidissement parallèle à l'arbre à cames (14);
- ce canal présente une ouverture d'entrée d'écoulement ouverte en direction de la marche, et
- un puits d'évacuation d'air (52), s'étendant verticalement vers le haut et/ou vers le bas, débouche à son extrémité opposée devant le tunnel (36) du mécanisme à chaîne ou à courroie (13).
7. Moteur Boxer suivant l'une des revendications 1 à 6, caractérisé en ce que:
- le carter de vilebrequin (2) est partagé en deux parties dans le plan vertical médian (1-1);
- l'arbre de vilebrequin (3) et l'arbre secondaire
(4) sont disposés dans le plan médian (l-l);
- un palier principal (10) est disposé de chaque côté des bielles de manivelle (3') de l'arbre de vilebrequin (3) immédiatement voisines, et
- chacune des masses d'équilibrage (11) est formée en une pièce directement à l'extérieur des deux paliers principaux (10) et à l'intérieur de garnitures d'étanchéité (10') voisines de l'arbre de vilebrequin (3).
8. Moteur Boxer suivant la revendication 7, caractérisé en ce que les masses d'équilibrage (11) ont la forme de disques étroits et sont disposées dans des espaces annulaires également étroits du carter de vilebrequin (2), entre les paliers principaux (10) et les garnitures d'étanchéité d'arbre (10').
9. Moteur Boxer suivant l'une des revendications 1 à 8, caractérisé en ce qu'est formée, sur la face supérieure du carter de vilebrequin (2), une bride de fixation (20) présentant plusieurs oeilletons (21 ) et/ou des perçages filetés pour la fixation et le blocage par vis (22) d'un corps creux de tôle en forme de cadre (23) qui entoure la partie supérieure et dans lequel débouche une ouverture d'évent (24) du carter de vilebrequin (2).
10. Moteur Boxer suivant l'une des revendications 1 à 9, comportant un couvercle de paroi supérieure essentiellement lisse (18) du carter de vilebrequin (2) qui recouvre des agrégats auxiliaires (génératrice 6) et/ou l'entraînement de l'arbre secondaire (4), moteur caractérisé en ce qu'est disposée, dans la paroi du carter de vilebrequin recouverte par le couvercle de paroi frontale (18), une ouverture de montage pour un filtre à huile (15) disposé allongé dans le carter et qui présente un couvercle amovible (17) qui présente des canaux de liaison (17') incorporés en une seule pièce, dirigés vers des canaux à huile dans le carter de vilebrequin (2).
11. Moteur Boxer suivant la revendication 4, caractérisé en ce que l'axe longitudinal de la bougie d'allumage (45) forme avec l'axe du cylindre un angle d'environ 45 à 75° supérieur à celui du plan déterminé par les soupapes d'admission.
EP82105324A 1981-06-26 1982-06-18 Moteur à combustion interne, à quatre-temps, à deux cylindres du type boxer, en particulier pour motocyclette et refroidi par le courant d'air causé par le déplacement Expired EP0068336B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8383112438T DE3273260D1 (en) 1981-06-26 1982-06-18 Cylinder head for a four-stroke internal-combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3125077 1981-06-26
DE19813125077 DE3125077A1 (de) 1981-06-26 1981-06-26 Zweizylinder-viertakt-boxermotor, insbesondere fahrtwindluftgekuehlt fuer motorraeder

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP83112438.3 Division-Into 1983-12-10

Publications (2)

Publication Number Publication Date
EP0068336A1 EP0068336A1 (fr) 1983-01-05
EP0068336B1 true EP0068336B1 (fr) 1985-02-06

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Application Number Title Priority Date Filing Date
EP82105324A Expired EP0068336B1 (fr) 1981-06-26 1982-06-18 Moteur à combustion interne, à quatre-temps, à deux cylindres du type boxer, en particulier pour motocyclette et refroidi par le courant d'air causé par le déplacement
EP83112438A Expired EP0113450B1 (fr) 1981-06-26 1982-06-18 Culasse pour un moteur à combustion interne à quatre temps

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP83112438A Expired EP0113450B1 (fr) 1981-06-26 1982-06-18 Culasse pour un moteur à combustion interne à quatre temps

Country Status (5)

Country Link
US (1) US4558676A (fr)
EP (2) EP0068336B1 (fr)
JP (1) JPS58501045A (fr)
DE (3) DE3125077A1 (fr)
WO (1) WO1983000188A1 (fr)

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Also Published As

Publication number Publication date
DE3273260D1 (en) 1986-10-16
DE3262212D1 (en) 1985-03-21
JPS58501045A (ja) 1983-06-30
DE3125077A1 (de) 1983-01-13
US4558676A (en) 1985-12-17
EP0068336A1 (fr) 1983-01-05
WO1983000188A1 (fr) 1983-01-20
EP0113450A1 (fr) 1984-07-18
EP0113450B1 (fr) 1986-09-10
JPS6127569B2 (fr) 1986-06-26

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