EP3094834B1 - Oil aspiration system for an engine having a cylinder horizontal or inclined under an horizontal plane - Google Patents

Oil aspiration system for an engine having a cylinder horizontal or inclined under an horizontal plane Download PDF

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Publication number
EP3094834B1
EP3094834B1 EP15702535.4A EP15702535A EP3094834B1 EP 3094834 B1 EP3094834 B1 EP 3094834B1 EP 15702535 A EP15702535 A EP 15702535A EP 3094834 B1 EP3094834 B1 EP 3094834B1
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EP
European Patent Office
Prior art keywords
cylinder head
pump
internal combustion
combustion engine
engine according
Prior art date
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Application number
EP15702535.4A
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German (de)
French (fr)
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EP3094834A1 (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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0253—Pressure lubrication using lubricating pumps characterised by the pump driving means
    • F01M2001/0261—Pressure lubrication using lubricating pumps characterised by the pump driving means driven by the camshaft
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0284—Pressure lubrication using lubricating pumps mounting of the pump

Definitions

  • the present invention relates to the field of explosion engines, and more particularly to engines whose cylinders are horizontal or inclined under the horizontal plane.
  • This situation can result either from the architecture of the vehicle (for example a car engine with flat cylinders, or a motorcycle of the "flattwin” type), or from its use (for example a particular aerobatic plane, or a motorcycle on a stand).
  • 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.
  • German patent application DE 4424248 describing a "flat-six" flatbed motor with a gear pump for emptying the cylinder head.
  • the problem of the prior art is that when the cylinder head is in an inclined or horizontal position, the oil stagnates in the lower part of the cylinder head. Due to the high temperature of the cylinder head, the oil level rises in the cylinder head creating a bubbling and infiltration of oil through the valves creating fumes.
  • the present invention relates, in its most general sense, to an explosion engine comprising at least one cylinder inclined under the horizontal plane, comprising a cylinder head provided with lubricating means, and a distribution system, characterized in that said cylinder head comprises an oil return pump sucking the oil into the low point of the cylinder head cover and driving the oil towards the main casing of the engine.
  • said pump is driven by the dispensing system.
  • the body of the pump is machined in the cylinder head and closed by a lid.
  • the body of the pump opens into a suction bore.
  • said pump is a trochoidal pump.
  • the invention preferably relates to a twin-cylinder engine whose cylinders are opposite and arranged longitudinally with respect to the vehicle, in particular a motorcycle.
  • the cylinders are inclined relative to the horizontal plane at an angle of about 25 °.
  • One of the cylinders is inclined downwards, the other by the top.
  • Lubricating oil has a tendency to accumulate in the lower head of the bolt, and must be evacuated.
  • the evacuation is done by gravity.
  • the evacuation can be done by gravity or with a pump.
  • the oil of the crankcase can go up through the evacuation tubes towards the cylinder head, which is not appropriate.
  • the figure 1 represents a view of the cylinder head (1) and the cylinder (2).
  • the cylinder head (1) is shown without its upper half-bearing or the pump.
  • the cylinder head has an exhaust cam shaft (3) and an intake cam shaft (4).
  • the yoke (1) has at its end an extension (5) on which is applied the half-bearing (6) shown in FIG. figure 2 .
  • the pump body (7) is formed by machining for a first semi-cylindrical part (8) in the extension (5) and a second semi-cylindrical portion (9) machined in half-bearing (6).
  • the inner (10) and outer (11) rotors are housed in the pump body (7).
  • the inner rotor (10) is carried by the camshaft end (12) and driven by the pin (13).
  • a cover (14) closes the pump. It has on its inner surface an intake pocket (15) and an exhaust pocket (16).
  • the oil is drawn from an orifice (17) connecting the draw zone (18) located in the lowest part of the cylinder head to a cylinder head inlet pocket (19) communicating with the air bag. inlet (15) of the lid, supplying the pump.
  • the oil is sucked between the inner rotor (10) and the outer rotor (11) and pushed into the pocket (16).
  • This pocket (16) communicates with the pocket (20) to be then rejected in a drilling system oriented along the axis (21), into the main housing of the engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

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 inclinés sous le plan horizontal. Cette situation peut résulter soit de l'architecture du véhicule (par exemple un moteur de voiture avec des cylindres à plat, ou une motocyclette de type « flattwin »), soit de son utilisation (par exemple un avion notamment de voltige, ou une motocyclette béquillée).The present invention relates to the field of explosion engines, and more particularly to engines whose cylinders are horizontal or inclined under the horizontal plane. This situation can result either from the architecture of the vehicle (for example a car engine with flat cylinders, or a motorcycle of the "flattwin" type), or from its use (for example a particular aerobatic plane, or a motorcycle on a stand).

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 allemand DE 4424248 décrivant un moteur à plat de type « flat-six » avec une pompe à engrenage pour le vidage de la culasse.It is known in the state of the art the German patent application DE 4424248 describing a "flat-six" flatbed motor with a gear pump for emptying the cylinder head.

D'autres documents tels que les demandes DE102008014828 , DE2020100123697 , JP S60192820 , JP H08100614 ou DE4007939 décrivent différentes solutions de vidage de la culasse.Other documents such as requests DE102008014828 , DE2020100123697 , JP S60192820 , JP H08100614 or DE4007939 describe different solutions for emptying the cylinder head.

Inconvénient de l'artDisadvantage of art

Le problème de l'art antérieur est que lorsque la culasse se trouve en position inclinée ou horizontale, l'huile stagne dans la partie basse de la culasse. En raison de la température élevée de la culasse, le niveau d'huile monte dans la culasse créant un barbotage et une infiltration d'huile au travers des soupapes créant des fumées.The problem of the prior art is that when the cylinder head is in an inclined or horizontal position, the oil stagnates in the lower part of the cylinder head. Due to the high temperature of the cylinder head, the oil level rises in the cylinder head creating a bubbling and infiltration of oil through the valves creating fumes.

En particulier, pour des moteurs présentant un cylindre incliné sous l'horizontale et orienté longitudinalement, une problématique particulière se pose du fait des transferts intempestifs d'huile se produisant lors des freinages brutaux ou des accélérations puissantes.In particular, for engines having a cylinder inclined under the horizontal and oriented longitudinally, a particular problem arises due to inadvertent transfer of oil occurring during sudden braking or powerful accelerations.

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 un cylindre incliné sous le plan horizontal, comportant une culasse muni de moyens de graissage, et un système de distribution, caractérisé en ce que ladite culasse comporte une pompe de retour d'huile aspirant l'huile dans le point bas du couvre-culasse et refoulant l'huile vers le carter principal du moteur.In order to overcome these drawbacks, the present invention relates, in its most general sense, to an explosion engine comprising at least one cylinder inclined under the horizontal plane, comprising a cylinder head provided with lubricating means, and a distribution system, characterized in that said cylinder head comprises an oil return pump sucking the oil into the low point of the cylinder head cover and driving the oil towards the main casing of the engine.

Avantageusement, ladite pompe est entraînée par le système de distribution.Advantageously, said pump is driven by the dispensing system.

De préférence, le corps de la pompe est usiné dans la culasse et fermé par un couvercle.Preferably, the body of the pump is machined in the cylinder head and closed by a lid.

Selon un mode de mise en oeuvre particulier, le corps de la pompe débouche dans un forage d'aspiration.According to a particular embodiment, the body of the pump opens into a suction bore.

Avantageusement, ladite pompe est une pompe trochoïdale.Advantageously, said pump is a trochoidal pump.

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 de la culasse d'un moteur ouverte
  • la figure 2 représente une vue de trois-quarts avant de la culasse d'un moteur avec le rotor de la pompe sans couvre culasse ni couvercle de pompe
  • la figure 3 représente une vue de trois-quarts avant de la culasse sans couvre culasse avec son couvercle de pompe dont la figure 4 représente une vue de derrière.
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 the breech of an open engine
  • the figure 2 represents a three-quarter front view of the cylinder head of an engine with the pump rotor without a cylinder head cover or pump cover
  • the figure 3 represents a three-quarter front view of the cylinder head without a cylinder head cover with its pump cover whose figure 4 represents a view from behind.

L'invention concerne de préférence un moteur bicylindre dont les cylindres sont opposés et disposés longitudinalement par rapport au véhicule, notamment une motocyclette. Les cylindres sont inclinés par rapport au plan horizontal, d'un angle d'environ 25°. L'un des cylindres est incliné vers le bas, l'autre par le haut.The invention preferably relates to a twin-cylinder engine whose cylinders are opposite and arranged longitudinally with respect to the vehicle, in particular a motorcycle. The cylinders are inclined relative to the horizontal plane at an angle of about 25 °. One of the cylinders is inclined downwards, the other by the top.

L'huile de graissage a tendance à s'accumuler dans la tête de culasse basse, et doit être évacuée. Pour un moteur vertical, l'évacuation se fait par gravité. Pour un moteur horizontal ou incliné, l'évacuation peut se faire par gravité ou avec une pompe. Lors du freinage et dans le cas d'un retour par gravité, l'huile du carter moteur peut remonter par les tubes d'évacuation vers la culasse, ce qui n'est pas approprié.Lubricating oil has a tendency to accumulate in the lower head of the bolt, and must be evacuated. For a vertical motor, the evacuation is done by gravity. For a horizontal or inclined motor, the evacuation can be done by gravity or with a pump. During braking and in the case of a return by gravity, the oil of the crankcase can go up through the evacuation tubes towards the cylinder head, which is not appropriate.

La figure 1 représente une vue de la culasse (1) et du cylindre (2). La culasse (1) est représentée sans son demi-palier supérieur ni la pompe.The figure 1 represents a view of the cylinder head (1) and the cylinder (2). The cylinder head (1) is shown without its upper half-bearing or the pump.

La culasse présente un arbre à came d'échappement (3) et un arbre à came d'admission (4).The cylinder head has an exhaust cam shaft (3) and an intake cam shaft (4).

La culasse (1) présente à son extrémité un prolongement (5) sur lequel vient s'appliquer le demi-palier (6) représenté en figure 2.The yoke (1) has at its end an extension (5) on which is applied the half-bearing (6) shown in FIG. figure 2 .

Le corps de pompe (7) est formé par un usinage réalisé pour une première partie semi-cylindrique (8) dans le prolongement (5) et une deuxième partie semi-cylindrique (9) usinée dans demi-palier (6).The pump body (7) is formed by machining for a first semi-cylindrical part (8) in the extension (5) and a second semi-cylindrical portion (9) machined in half-bearing (6).

Les rotors intérieur (10) et extérieur (11) sont logés dans le corps de pompe (7). Le rotor intérieur (10) est porté par le bout d'arbre à came (12) et entraîné par la goupille (13).The inner (10) and outer (11) rotors are housed in the pump body (7). The inner rotor (10) is carried by the camshaft end (12) and driven by the pin (13).

Un capot (14) referme la pompe. Il présente à sa surface intérieure une poche d'admission (15) et une poche d'échappement (16). L'aspiration d'huile se fait à partir d'un orifice (17) reliant la zone de puisage (18) située dans la partie la plus basse de la culasse à une poche d'admission culasse (19) communiquant avec la poche d'admission (15) du couvercle, alimentant la pompe.A cover (14) closes the pump. It has on its inner surface an intake pocket (15) and an exhaust pocket (16). The oil is drawn from an orifice (17) connecting the draw zone (18) located in the lowest part of the cylinder head to a cylinder head inlet pocket (19) communicating with the air bag. inlet (15) of the lid, supplying the pump.

L'huile est aspirée entre le rotor intérieur (10) et le rotor extérieur (11) et refoulé dans la poche (16). Cette poche (16) communique avec la poche (20) pour être ensuite rejetée dans un système de forages orientés selon l'axe (21), jusque dans le carter principal du moteur.The oil is sucked between the inner rotor (10) and the outer rotor (11) and pushed into the pocket (16). This pocket (16) communicates with the pocket (20) to be then rejected in a drilling system oriented along the axis (21), into the main housing of the engine.

Claims (9)

  1. A two-cylinder internal combustion engine for motorcycles whose cylinders are opposed and arranged longitudinally with respect to the motorcycle, comprising at least one cylinder inclined under the horizontal plane, comprising a cylinder head (1) provided with lubrication means, and a distribution system comprising a cam shaft, said cylinder head (1) comprising an oil return pump sucking oil at the lower point of the cylinder head cover (18) and delivering oil to the main crankcase of the engine, characterized in that the pump casing (7) comprises two inner (10) and outer (11) rotors, the inner rotor (10) being carried by the camshaft tip (12) and the cover (14) closing the pump and having on its inner surface an intake pocket (15) and an exhaust pocket (16).
  2. The internal combustion engine according to the main claim, wherein the pump casing (7) is machined in the cylinder head and closed by a cover.
  3. The internal combustion engine according to the preceding claim, wherein the pump casing (7) is formed by machining for a first semi-cylindrical part (8) in an extension (5) of the cylinder head (1) and a second semi-cylindrical part (9) machined in a half bearing (6) of the cylinder head (1).
  4. The internal combustion engine according to the main claim, wherein said pump is a trochoidal pump.
  5. The internal combustion engine according to the preceding claim, wherein the pump casing (7) opens into a suction borehole.
  6. An internal combustion engine according to any one of the preceding claims, wherein the pump casing (7) is formed by machining for a first semi-cylindrical part (8) in the extension (5) and a second semi-cylindrical part (9) machined in a half bearing (6).
  7. The internal combustion engine according to the preceding claim, further comprising an orifice (17) connecting the draw zone (18) located in the lowest part of the cylinder head to a cylinder head inlet pocket (19) communicating with the inlet pocket (15) of the cover, supplying the pump.
  8. A motorcycle comprising a two-cylinder internal combustion engine according to any one of the preceding claims, the cylinders of which are opposed and arranged longitudinally with respect to said motorcycle.
  9. An engine according to the preceding claim, wherein the cylinders are inclined with respect to the horizontal plane at an angle of about 25°.
EP15702535.4A 2014-01-13 2015-01-08 Oil aspiration system for an engine having a cylinder horizontal or inclined under an horizontal plane Active EP3094834B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1450241A FR3016403B1 (en) 2014-01-13 2014-01-13 OIL SUCTION SYSTEM FOR EXPLOSION ENGINE COMPRISING AT LEAST ONE HORIZONTAL OR INCLINE CYLINDER
PCT/FR2015/050029 WO2015104498A1 (en) 2014-01-13 2015-01-08 Oil suction system for an internal combustion engine comprising at least one cylinder that is horizontal or inclined below the horizontal plane

Publications (2)

Publication Number Publication Date
EP3094834A1 EP3094834A1 (en) 2016-11-23
EP3094834B1 true EP3094834B1 (en) 2019-11-27

Family

ID=50729608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15702535.4A Active EP3094834B1 (en) 2014-01-13 2015-01-08 Oil aspiration system for an engine having a cylinder horizontal or inclined under an horizontal plane

Country Status (5)

Country Link
EP (1) EP3094834B1 (en)
JP (1) JP6539853B2 (en)
CN (1) CN106030058A (en)
FR (1) FR3016403B1 (en)
WO (1) WO2015104498A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0680289B2 (en) * 1984-03-14 1994-10-12 ヤマハ発動機株式会社 Lubricating device for motorcycle engine
JPH0169105U (en) * 1987-10-27 1989-05-08
DE4007939C1 (en) * 1990-03-13 1991-08-08 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Oil return system from IC engine cylinder head to sump - has oil return line completely outside engine block, and collector on cylinder head casing outside
DE4424248C1 (en) * 1994-07-09 1995-12-07 Porsche Ag Internal combustion engine with two cylinder banks inclined against the vertical
JP3194179B2 (en) * 1994-09-30 2001-07-30 スズキ株式会社 Outboard oil pump device
DE102008014828A1 (en) * 2008-03-18 2009-09-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine
DE102009042290B4 (en) * 2009-09-19 2012-03-01 Reinhart Fenske Box-type two-stroke internal combustion engine
CN202832714U (en) * 2012-09-14 2013-03-27 长城汽车股份有限公司 Oil returning structure of automobile engine oil-gas separation system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP2017502211A (en) 2017-01-19
FR3016403A1 (en) 2015-07-17
CN106030058A (en) 2016-10-12
JP6539853B2 (en) 2019-07-10
WO2015104498A1 (en) 2015-07-16
EP3094834A1 (en) 2016-11-23
FR3016403B1 (en) 2018-10-12

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