WO2000034640A1 - Internal combustion engine cylinder head cooled with liquid - Google Patents

Internal combustion engine cylinder head cooled with liquid Download PDF

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Publication number
WO2000034640A1
WO2000034640A1 PCT/FR1999/002928 FR9902928W WO0034640A1 WO 2000034640 A1 WO2000034640 A1 WO 2000034640A1 FR 9902928 W FR9902928 W FR 9902928W WO 0034640 A1 WO0034640 A1 WO 0034640A1
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WO
WIPO (PCT)
Prior art keywords
cylinder head
water
liquid
internal combustion
combustion engine
Prior art date
Application number
PCT/FR1999/002928
Other languages
French (fr)
Inventor
Philippe Brunet
Original Assignee
Renault Sport
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault Sport filed Critical Renault Sport
Priority to EP99956155A priority Critical patent/EP1135587B1/en
Priority to DE69910249T priority patent/DE69910249T2/en
Publication of WO2000034640A1 publication Critical patent/WO2000034640A1/en

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Classifications

    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • 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
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders 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
    • F02B75/20—Multi-cylinder engines with cylinders all in one line
    • 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 present invention relates to a cylinder head for an internal combustion engine intended in particular to equip a vehicle such as an automobile or a motorcycle.
  • the invention relates more particularly to a cooling circuit extending through a cylinder head of the engine.
  • Cooling by circulation of a liquid such as water is the most commonly used cooling mode for cooling internal combustion engines in particular because it allows to evacuate a large flow of calories even in areas very confined like cylinder heads and also because the liquid allows by its mass to ensure a certain acoustic insulation of the engine.
  • the main functions of an engine liquid cooling circuit are therefore to cool the hot parts of the engine by forced circulation through the engine and to transfer the calories thus withdrawn to the ambient air through a liquid / air heat exchanger. called radiator.
  • the object of the present invention is to propose a cylinder head for an internal combustion engine comprising a cooling circuit which is both efficient and simple to produce.
  • the cylinder head for a liquid-cooled internal combustion engine comprises intake and exhaust ducts opening through the walls of the combustion chambers formed on its underside by orifices cooperating with rod valves and a circuit. for the coolant intended in particular to cool said walls of the combustion chambers.
  • the cylinder head for a liquid-cooled internal combustion engine is characterized in that, the cooling circuit includes rise passages of water which extend parallel to the housings provided for the stems of the exhaust valves.
  • the coolant circuit comprises water inlet orifices on the underside of the cylinder head, a water chamber s 'extending at the periphery of the walls of the combustion chamber, rising water passages extending substantially parallel and close to the housings of the exhaust valve stems and a manifold extending transversely in the upper part of the cylinder head to open on the side admission side of the cylinder head through a water outlet orifice.
  • the water chamber disposed at the periphery of the walls of a corresponding combustion chamber extends substantially parallel to the underside of the cylinder head.
  • the water chamber disposed at the periphery of the walls of a corresponding combustion chamber is of substantially toroidal shape.
  • the water rise passages leave the water chamber by surrounding partially the exhaust ports formed through the walls of the corresponding combustion chamber.
  • each combustion chamber cooperating with a spark plug coming to be housed in a well vertically passing through the cylinder head all or part of the rise passages of corresponding water extend near said spark plug well in particular in the lower part of the latter so as to cool the vicinity of the electrodes of the spark plug.
  • each combustion chamber cooperating with two exhaust valves, the corresponding water rise passages are then three in number, namely a central passage extending between the two housings provided for the passage of the exhaust rods and two lateral passages extending substantially curved on either side of said housing.
  • the water uplift passages associated with two adjacent combustion chambers open into a same collecting gallery extending transversely between the two chambers combustion.
  • each water chamber cooperates with a degassing passage extending opposite to the rising water passages, said passage degassing opening onto the adjacent intake side face of the cylinder head.
  • the two water chambers extending at the periphery of two adjacent combustion chambers are connected together by at least one degassing passage opening in the lower part of the lateral intake side of the cylinder head through a specific outlet orifice.
  • water inlet orifices of suitable section open into each water chamber substantially vertically upstream water passages .
  • Figure 1 is a perspective view of a foundry core for the cylinder head of an internal combustion engine defining a cooling circuit 1 according to the invention
  • Figure 2 is a view similar to Figure 1 where have been shown schematically around the water core the intake and exhaust ducts and the corresponding valves;
  • FIG. 3 is a partial bottom view of a cylinder head having been obtained using the core of FIG. 1.
  • the cylinder head, referenced 1 in FIG. 3, which has been chosen to illustrate the water circuit according to the invention relates more particularly to an internal combustion engine, with four times and controlled ignition.
  • the operating mode of the engine four or two stroke, controlled ignition or compression ignition, is in no way limitative of the invention.
  • the engine may be of the single-cylinder type as well as of the in-line, V-shaped, or flat multi-cylinder type.
  • the engine more particularly studied for equipping a motorcycle is a V-shaped four-cylinder comprising two substantially identical cylinder heads. Only one of the two cylinder heads has therefore been shown.
  • the cylinder head 1 shown is of the liquid-cooled type and cross-flow (or "cross-flow") that is to say that the intake and exhaust ducts extend respectively on either side from the longitudinal median plane of the cylinder head.
  • This cylinder head 1 made of aluminum alloy is conventionally obtained by molding.
  • the foundry process used in the example illustrated is a gravity or low pressure casting combining sand cores and metallic external imprints.
  • the sand cores define the various passages passing through the cylinder head 1 such as the intake and exhaust ducts or even the cooling circuit.
  • the cylinder head 1 comprises, on its lower face 2 intended to come into abutment with the interposition of a seal against the cylinder block, not shown, walls 3 of suitable shapes delimiting two combustion chambers. These two combustion chambers opening out opposite the corresponding cylindrical bores of the cylinder block, are identical and extend substantially along the longitudinal axis of the cylinder head 1.
  • the walls 3 delimiting the combustion chambers are pierced by two intake orifices 4 and two exhaust orifices 5 provided with attached seats.
  • the orifices 4 and 5 which extend on either side of the median plane longitudinal of the cylinder head, are extended by conduits 6 and 7 (shown in dotted lines in FIG. 2) respectively for admitting the fuel mixture and for exhausting the burnt gases.
  • These inlet and exhaust ducts 6 and 7 extend through the cylinder head 1 to lead respectively to the upper face of the cylinder head and to a lateral face of the latter also called the "exhaust" face.
  • the orifices 4 and 5 cooperate with rod valves slidably mounted in attached guides inserted in corresponding housings of the cylinder head. These valves are operated by suitable control mechanisms not shown. Only the housings 8 and 9 of the valve guides, respectively of intake and exhaust, have been shown in dotted lines in FIG. 2.
  • the cylinder head 1 also has passages or wells 13 extending substantially in the axis of the cylinders and opening substantially at the center of each of the walls 3 delimiting the combustion chambers to allow the passage of non-illustrated spark plugs.
  • the cylinder head comprises from the foundry a circuit adapted for the circulation of the coolant coming from the cylinder block.
  • the cooling circuit is described in the case of a cylinder head with two combustion chambers but obviously it can be extended or reduced to be used on any cylinder head regardless of the number of combustion chambers.
  • the cooling circuit is in the form of two elementary circuits 10 which are substantially identical and each suitable for cooling a given combustion chamber.
  • Each elementary circuit 10 is composed of an annular cavity 11 also called a water chamber extending at the periphery of the walls 3 of the corresponding combustion chamber, of passages known as rising water passages 14, 15 and 16 s' extending substantially parallel and close to the housings of the exhaust valve stems and of a collecting gallery 19 extending transversely in the upper part of the cylinder head to lead to the lateral face known as "intake" of the cylinder head by an outlet orifice of water 20.
  • annular cavity 11 also called a water chamber extending at the periphery of the walls 3 of the corresponding combustion chamber, of passages known as rising water passages 14, 15 and 16 s' extending substantially parallel and close to the housings of the exhaust valve stems and of a collecting gallery 19 extending transversely in the upper part of the cylinder head to lead to the lateral face known as "intake" of the cylinder head by an outlet orifice of water 20.
  • Each water chamber 11 is supplied with cooling liquid through calibrated orifices 12 opening onto the underside of the cylinder head 1, as shown in FIG. 3. These orifices, provided opposite corresponding orifices of the upper tablature of the cylinder block, are adapted to supply the water chamber 11 according to a suitable flow of coolant.
  • Each water chamber 11 of more or less toroidal shape is disposed at the periphery of the walls 3 of the corresponding combustion chamber so as to extend substantially parallel to the underside of the cylinder head.
  • the rising water passages 14, 15, 16 associated with a water chamber 11 start from the latter by surrounding the seats of the exhaust valves positioned in line with the exhaust orifices 9.
  • These water rise passages are three in number, namely a central passage 15 extending parallel and between the two housings 9 of the exhaust valve stems and two lateral passages 14 and 16 extending substantially curved. around the housings 9 of the exhaust valve stems.
  • the lateral water rise passages 14 and 16 also extend in the vicinity of the spark plug well 13, in particular in the lower part of the latter so as to cool the vicinity of the spark plug electrodes.
  • the two elementary circuits 10 associated with two adjacent combustion chambers open out jointly into the same collecting gallery 19 extending transversely between the two combustion chambers. Furthermore, the two circuits 10 put the water chambers into communication there by two passages a passage 18 extending substantially in the longitudinal axis of the cylinder head 1 and a passage 17 serving more particularly for degassing of the circuits which extends opposite the passages 14, 15, 16 for raising the water to lead to the adjacent intake side face of the cylinder head by an orifice 21 distinct from the orifice 20.
  • a water inlet orifice 12 of suitable section is arranged. substantially vertical to each of the rising water passages.

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

Abstract

The invention concerns an internal combustion engine cylinder head (1) cooled with liquid, comprising intake (6) and exhaust (7) conduits emerging through the combustion chamber walls provided on its lower surface through orifices co-operating with puppet valves and a circuit (10) for the cooling liquid designed in particular for cooling said combustion chamber walls. The invention is characterised in that the cooling circuit (10) comprises passages (14, 15, 16) for the upsurge of water extending substantially parallel to the housings (9) provided for the exhaust puppet valves.

Description

CULASSE DE MOTEUR A COMBUSTION INTERNE REFROIDIE PAR LIQUIDE LIQUID COOLED INTERNAL COMBUSTION ENGINE CYLINDER HEAD
La présente invention concerne une culasse pour moteur à combustion interne destiné notamment à équiper un véhicule telles qu'une automobile ou une motocyclette. L'invention concerne plus particulièrement un circuit de refroidissement s ' étendant à travers une culasse du moteur.The present invention relates to a cylinder head for an internal combustion engine intended in particular to equip a vehicle such as an automobile or a motorcycle. The invention relates more particularly to a cooling circuit extending through a cylinder head of the engine.
Le refroidissement par circulation d'un liquide telle que de l'eau est le mode de refroidissement le plus couramment utilisé pour refroidir les moteurs à combustion interne en particulier par ce qu'il permet d'évacuer un flux important de calories même dans des zones très confinées comme les culasses et également parce que le liquide permet par sa masse d'assurer une certaine isolation acoustique du moteur.Cooling by circulation of a liquid such as water is the most commonly used cooling mode for cooling internal combustion engines in particular because it allows to evacuate a large flow of calories even in areas very confined like cylinder heads and also because the liquid allows by its mass to ensure a certain acoustic insulation of the engine.
Un circuit de refroidissement par liquide de moteur a donc pour principales fonctions de refroidir les parties chaudes du moteur par une circulation forcée à travers ce dernier et de céder les calories ainsi prélevées à l'air ambiant à travers un échangeur de chaleur liquide/air encore appelé radiateur.The main functions of an engine liquid cooling circuit are therefore to cool the hot parts of the engine by forced circulation through the engine and to transfer the calories thus withdrawn to the ambient air through a liquid / air heat exchanger. called radiator.
La circulation du liquide à 1 ' intérieur du moteur s'opère du bas vers le haut, d'abord à travers une cavité appelée chambre d'eau qui est ménagée dans le carter-cylindres autour des alésages cylindriques puis à travers la culasse dans un circuit approprié s ' étendant autour des chambres de combustion. Aujourd'hui, la généralisation des culasses comportant quatre soupapes ou plus par cylindre pour améliorer les performances des moteurs posent de délicats problèmes de refroidissement du fait d'une moindre place disponible pour agencer la circulation du liquide de refroidissement autour des chambres de combustion.The circulation of the liquid inside the engine takes place from the bottom up, first through a cavity called a water chamber which is formed in the cylinder block around the cylindrical bores then through the cylinder head in a suitable circuit extending around the combustion chambers. Today, the generalization of cylinder heads with four or more valves per cylinder to improve engine performance poses delicate cooling problems due to the fact that there is less space available for arranging the circulation of coolant around the combustion chambers.
Par ailleurs, aucune réalisation connue n'assure un refroidissement satisfaisant des soupapes d'échappement proprement dites ainsi que de leurs guides et leurs sièges or ces soupapes d'échappement peuvent être soumises à des contraintes thermiques élevées qui abrègent leurs durées de vie .Furthermore, no known embodiment provides satisfactory cooling of the exhaust valves themselves as well as their guides and their seats, but these exhaust valves can be subjected to high thermal stresses which shorten their service lives.
Le but de la présente invention est de proposer une culasse pour moteur à combustion interne comportant un circuit de refroidissement tout à la fois performant et simple à réaliser.The object of the present invention is to propose a cylinder head for an internal combustion engine comprising a cooling circuit which is both efficient and simple to produce.
La culasse pour moteur à combustion interne refroidie par liquide selon 1 ' invention comporte des conduits d'admission et d'échappement débouchant à travers les parois des chambres de combustion ménagées sur sa face inférieure par des orifices coopérant avec des soupapes à tige et un circuit pour le liquide de refroidissement destiné notamment à refroidir lesdites parois des chambres de combustion.The cylinder head for a liquid-cooled internal combustion engine according to the invention comprises intake and exhaust ducts opening through the walls of the combustion chambers formed on its underside by orifices cooperating with rod valves and a circuit. for the coolant intended in particular to cool said walls of the combustion chambers.
Selon l'invention, la culasse pour moteur à combustion interne refroidie par liquide est caractérisée en ce que, le circuit de refroidissement comporte des passages de montée d'eau qui s'étendent parallèlement aux logements prévus pour les tiges des soupapes d'échappement.According to the invention, the cylinder head for a liquid-cooled internal combustion engine is characterized in that, the cooling circuit includes rise passages of water which extend parallel to the housings provided for the stems of the exhaust valves.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, le circuit du liquide de refroidissement comprend des orifices d'entrée d'eau sur la face inférieure de la culasse, une chambre d'eau s ' étendant à la périphérie des parois de la chambre de combustion, des passages de montée d'eau s ' étendant sensiblement parallèlement et à proximité des logements des tiges de soupapes d'échappement et une galerie collectrice s ' étendant transversalement en partie haute de la culasse pour déboucher sur la face latérale admission de la culasse par un orifice de sortie d'eau.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, the coolant circuit comprises water inlet orifices on the underside of the cylinder head, a water chamber s 'extending at the periphery of the walls of the combustion chamber, rising water passages extending substantially parallel and close to the housings of the exhaust valve stems and a manifold extending transversely in the upper part of the cylinder head to open on the side admission side of the cylinder head through a water outlet orifice.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, la chambre d'eau disposée à la périphérie des parois d'une chambre de combustion correspondante s'étend sensiblement parallèlement à la face inférieure de la culasse.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, the water chamber disposed at the periphery of the walls of a corresponding combustion chamber extends substantially parallel to the underside of the cylinder head.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, la chambre d'eau disposée à la périphérie des parois d'une chambre de combustion correspondante est de forme sensiblement torique.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, the water chamber disposed at the periphery of the walls of a corresponding combustion chamber is of substantially toroidal shape.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, les passages de montée d'eau quittent la chambre d'eau en entourant partiellement les orifices d'échappement ménagés à travers les parois de la chambre de combustion correspondante .According to another characteristic of the cylinder head for a liquid-cooled internal combustion engine object of the invention, the water rise passages leave the water chamber by surrounding partially the exhaust ports formed through the walls of the corresponding combustion chamber.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, chaque chambre de combustion coopérant avec une bougie d'allumage venant se loger dans un puits traversant verticalement la culasse, tout ou partie des passages de montée d'eau correspondant s'étendent à proximité dudit puits de bougie notamment dans la partie inférieure de ce dernier de façon à refroidir le voisinage des électrodes de la bougie.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, each combustion chamber cooperating with a spark plug coming to be housed in a well vertically passing through the cylinder head, all or part of the rise passages of corresponding water extend near said spark plug well in particular in the lower part of the latter so as to cool the vicinity of the electrodes of the spark plug.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, chaque chambre de combustion coopérant avec deux soupapes d'échappement, les passages de montée d'eau correspondant sont alors au nombre de trois, à savoir un passage central s ' étendant entre les deux logements prévus pour le passage des tiges d'échappement et deux passages latéraux s ' étendant de façon sensiblement incurvée de part et d'autre desdits logements.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, each combustion chamber cooperating with two exhaust valves, the corresponding water rise passages are then three in number, namely a central passage extending between the two housings provided for the passage of the exhaust rods and two lateral passages extending substantially curved on either side of said housing.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, les passages de montée d'eau associés à deux chambres de combustion adjacentes débouchent dans une même galerie collectrice s ' étendant transversalement entre les deux chambres de combustion. Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, chaque chambre d'eau coopère avec un passage de dégazage s ' étendant à l'opposé des passages de montée d'eau, ledit passage de dégazage débouchant sur la face latérale admission adjacente de la culasse.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, the water uplift passages associated with two adjacent combustion chambers open into a same collecting gallery extending transversely between the two chambers combustion. According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, each water chamber cooperates with a degassing passage extending opposite to the rising water passages, said passage degassing opening onto the adjacent intake side face of the cylinder head.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, les deux chambres d'eau s 'étendant à la périphérie de deux chambres de combustion adjacentes sont reliées entre elles par au moins un passage de dégazage débouchant en partie basse de la face latérale admission de la culasse par un orifice de sortie spécifique.According to another characteristic of the cylinder head for an internal combustion engine cooled by liquid object of the invention, the two water chambers extending at the periphery of two adjacent combustion chambers are connected together by at least one degassing passage opening in the lower part of the lateral intake side of the cylinder head through a specific outlet orifice.
Selon une autre caractéristique de la culasse pour moteur à combustion interne refroidie par liquide objet de l'invention, des orifices d'entrée d'eau de section adaptée débouchent dans chaque chambre d'eau sensiblement à la verticale des passages de montée d'eau.According to another characteristic of the cylinder head for a liquid-cooled internal combustion engine which is the subject of the invention, water inlet orifices of suitable section open into each water chamber substantially vertically upstream water passages .
On comprendra mieux les buts, aspects et avantages de la présente invention, d'après la description donnée ci -après d'un mode de réalisation de l'invention, présenté à titre d'exemple non limitatif, en se référant aux dessins annexés, dans lesquels :The aims, aspects and advantages of the present invention will be better understood from the description given below of an embodiment of the invention, presented by way of non-limiting example, with reference to the accompanying drawings, wherein :
la figure 1 est une vue en perspective d'un noyau de fonderie pour culasse de moteur à combustion interne définissant un circuit de refroidissement selon 1 ' invention ; la figure 2 est une vue similaire à la figure 1 où ont été schématisés autour du noyau d'eau les conduits d'admission et d'échappement ainsi que les soupapes correspondantes ;Figure 1 is a perspective view of a foundry core for the cylinder head of an internal combustion engine defining a cooling circuit 1 according to the invention; Figure 2 is a view similar to Figure 1 where have been shown schematically around the water core the intake and exhaust ducts and the corresponding valves;
la figure 3 est une vue de dessous partielle d'une culasse ayant été obtenue en utilisant le noyau de la figure 1.FIG. 3 is a partial bottom view of a cylinder head having been obtained using the core of FIG. 1.
Conformément aux figures, seuls les éléments nécessaires à la compréhension de l'invention ont été représentés. De plus, pour faciliter la lecture des dessins, les mêmes pièces portent les mêmes références d'une figure à 1 ' autre .In accordance with the figures, only the elements necessary for understanding the invention have been shown. In addition, to facilitate reading of the drawings, the same parts have the same references from one figure to another.
La culasse, référencée 1 sur la figure 3, qui a été choisie pour illustrer le circuit d'eau selon l'invention concerne plus particulièrement un moteur à combustion interne, à quatre temps et allumage commandé. Le mode de fonctionnement du moteur : quatre ou deux temps, allumage commandé ou allumage par compression, n'est absolument pas limitatif de l'invention. De même, le moteur peut être aussi bien de type monocylindre que du type multicylindre en ligne, en V, ou encore à plat.The cylinder head, referenced 1 in FIG. 3, which has been chosen to illustrate the water circuit according to the invention relates more particularly to an internal combustion engine, with four times and controlled ignition. The operating mode of the engine: four or two stroke, controlled ignition or compression ignition, is in no way limitative of the invention. Likewise, the engine may be of the single-cylinder type as well as of the in-line, V-shaped, or flat multi-cylinder type.
Selon donc le mode particulier de réalisation de l'invention, le moteur plus particulièrement étudié pour équiper une motocyclette est un quatre cylindres en V comportant deux culasses sensiblement identiques. Seule donc l'une des deux culasses a été représentée . La culasse 1 figurée est du type à refroidissement par liquide et à flux croisé (ou "cross-flow" ) c'est-à-dire que les conduits d'admission et d'échappement s'étendent respectivement de part et d'autre du plan médian longitudinal de la culasse. Cette culasse 1 réalisée en alliage d'aluminium est obtenue classiquement par moulage.According to the particular embodiment of the invention, therefore, the engine more particularly studied for equipping a motorcycle is a V-shaped four-cylinder comprising two substantially identical cylinder heads. Only one of the two cylinder heads has therefore been shown. The cylinder head 1 shown is of the liquid-cooled type and cross-flow (or "cross-flow") that is to say that the intake and exhaust ducts extend respectively on either side from the longitudinal median plane of the cylinder head. This cylinder head 1 made of aluminum alloy is conventionally obtained by molding.
Le procédé de fonderie retenu dans l'exemple illustré, est une coulée par gravité ou basse pression combinant des noyaux sables et des empreintes extérieures métalliques. Les noyaux sables définissent les différents passages traversant la culasse 1 tels que les conduits d'admission et d'échappement ou encore le circuit de refroidissement.The foundry process used in the example illustrated is a gravity or low pressure casting combining sand cores and metallic external imprints. The sand cores define the various passages passing through the cylinder head 1 such as the intake and exhaust ducts or even the cooling circuit.
La culasse 1 comprend, sur sa face inférieure 2 destinée à venir en appui avec interposition d'un joint contre le carter-cylindres non figuré, des parois 3 de formes adaptées délimitant deux chambres de combustion. Ces deux chambres de combustion débouchant en regard des alésages cylindriques correspondants du carter- cylindres, sont identiques et s'étendent sensiblement le long de 1 ' axe longitudinal de la culasse 1.The cylinder head 1 comprises, on its lower face 2 intended to come into abutment with the interposition of a seal against the cylinder block, not shown, walls 3 of suitable shapes delimiting two combustion chambers. These two combustion chambers opening out opposite the corresponding cylindrical bores of the cylinder block, are identical and extend substantially along the longitudinal axis of the cylinder head 1.
Les parois 3 délimitant les chambres de combustion sont percées de deux orifices d'admission 4 et deux orifices d'échappement 5 munis de sièges rapportés. Les orifices 4 et 5 qui s'étendent de part et d'autre du plan médian longitudinal de la culasse, se prolongent par des conduits 6 et 7 (représentés en traits pointillés sur la figure 2) respectivement d'admission du mélange carburé et d'échappement des gaz brûlés. Ces conduits 6 et 7 d'admission et d'échappement s ' étendent à travers la culasse 1 pour déboucher respectivement sur la face supérieure de la culasse et sur une face latérale de cette dernière encore appelée face « échappement » .The walls 3 delimiting the combustion chambers are pierced by two intake orifices 4 and two exhaust orifices 5 provided with attached seats. The orifices 4 and 5 which extend on either side of the median plane longitudinal of the cylinder head, are extended by conduits 6 and 7 (shown in dotted lines in FIG. 2) respectively for admitting the fuel mixture and for exhausting the burnt gases. These inlet and exhaust ducts 6 and 7 extend through the cylinder head 1 to lead respectively to the upper face of the cylinder head and to a lateral face of the latter also called the "exhaust" face.
Les orifices 4 et 5 coopèrent avec des soupapes à tige montées coulissantes dans des guides rapportés insérés dans des logements correspondant de la culasse . Ces soupapes sont manoeuvrées par des mécanismes de commande appropriés non figurés. Seuls les logements 8 et 9 des guides de soupapes, respectivement d'admission et d'échappement, ont été représentés en traits pointillés à la figure 2.The orifices 4 and 5 cooperate with rod valves slidably mounted in attached guides inserted in corresponding housings of the cylinder head. These valves are operated by suitable control mechanisms not shown. Only the housings 8 and 9 of the valve guides, respectively of intake and exhaust, have been shown in dotted lines in FIG. 2.
La culasse 1 présente par ailleurs des passages ou puits 13 s ' étendant sensiblement dans l'axe des cylindres et débouchant sensiblement au centre de chacune des parois 3 délimitant les chambres de combustion pour permettre le passage des bougies d'allumage non figurées.The cylinder head 1 also has passages or wells 13 extending substantially in the axis of the cylinders and opening substantially at the center of each of the walls 3 delimiting the combustion chambers to allow the passage of non-illustrated spark plugs.
Conformément à l'invention, la culasse comporte venu de fonderie un circuit adapté pour la circulation du liquide de refroidissement en provenance du carter-cylindres.According to the invention, the cylinder head comprises from the foundry a circuit adapted for the circulation of the coolant coming from the cylinder block.
En se reportant aux figures 1 et 2, on peut plus précisément comprendre la forme du circuit de refroidissement à partir de celle du noyau de sable correspondant .Referring to Figures 1 and 2, we can more precisely understand the shape of the circuit cooling from that of the corresponding sand core.
Le circuit de refroidissement est décrit dans le cas d'une culasse à deux chambres de combustion mais bien évidemment il peut être prolongé ou réduit pour être utilisé sur n'importe quelle culasse quel que soit le nombre des chambres de combustion.The cooling circuit is described in the case of a cylinder head with two combustion chambers but obviously it can be extended or reduced to be used on any cylinder head regardless of the number of combustion chambers.
Le circuit de refroidissement se présente sous la forme de deux circuits élémentaires 10 sensiblement identiques et adaptés chacun au refroidissement d'une chambre de combustion donnée.The cooling circuit is in the form of two elementary circuits 10 which are substantially identical and each suitable for cooling a given combustion chamber.
Chaque circuit élémentaire 10 se compose d'une cavité annulaire 11 encore appelée chambre d'eau s ' étendant à la périphérie des parois 3 de la chambre de combustion correspondante, de passages dits passages de montée d'eau 14, 15 et 16 s ' étendant sensiblement parallèlement et à proximité des logements des tiges de soupapes d'échappement et d'une galerie collectrice 19 s ' étendant transversalement en partie haute de la culasse pour déboucher sur la face latérale dite « admission » de la culasse par un orifice de sortie d'eau 20.Each elementary circuit 10 is composed of an annular cavity 11 also called a water chamber extending at the periphery of the walls 3 of the corresponding combustion chamber, of passages known as rising water passages 14, 15 and 16 s' extending substantially parallel and close to the housings of the exhaust valve stems and of a collecting gallery 19 extending transversely in the upper part of the cylinder head to lead to the lateral face known as "intake" of the cylinder head by an outlet orifice of water 20.
Chaque chambre d'eau 11 est alimentée en liquide de refroidissement par des orifices calibres 12 débouchant sur la face inférieure de la culasse 1, comme cela est représenté à la figure 3. Ces orifices, ménagés en regard d'orifices correspondants de la tablature supérieure du carter-cylindres, sont adaptés pour alimenter la chambre d'eau 11 selon un flux adapté de liquide de refroidissement .Each water chamber 11 is supplied with cooling liquid through calibrated orifices 12 opening onto the underside of the cylinder head 1, as shown in FIG. 3. These orifices, provided opposite corresponding orifices of the upper tablature of the cylinder block, are adapted to supply the water chamber 11 according to a suitable flow of coolant.
Chaque chambre d'eau 11 de forme plus ou moins torique est disposée à la périphérie des parois 3 de la chambre de combustion correspondante de façon à s'étendre sensiblement parallèlement à la face inférieure de la culasse.Each water chamber 11 of more or less toroidal shape is disposed at the periphery of the walls 3 of the corresponding combustion chamber so as to extend substantially parallel to the underside of the cylinder head.
Les passages de montée d'eau 14, 15, 16 associés à une chambre d'eau 11 partent de cette dernière en entourant les sièges des soupapes d'échappement positionnés au droit des orifices d'échappement 9.The rising water passages 14, 15, 16 associated with a water chamber 11 start from the latter by surrounding the seats of the exhaust valves positioned in line with the exhaust orifices 9.
Ces passages de montée d'eau sont au nombre de trois, à savoir un passage central 15 s ' étendant parallèlement et entre les deux logements 9 des tiges de soupapes d'échappement et deux passages latéraux 14 et 16 s ' étendant de façon sensiblement incurvée autour des logements 9 des tiges de soupapes d'échappement.These water rise passages are three in number, namely a central passage 15 extending parallel and between the two housings 9 of the exhaust valve stems and two lateral passages 14 and 16 extending substantially curved. around the housings 9 of the exhaust valve stems.
Les passages de montée d'eau latéraux 14 et 16 s'étendent par ailleurs à proximité du puits 13 de bougie notamment dans la partie inférieure de ce dernier de façon à refroidir le voisinage des électrodes de la bougie.The lateral water rise passages 14 and 16 also extend in the vicinity of the spark plug well 13, in particular in the lower part of the latter so as to cool the vicinity of the spark plug electrodes.
Les deux circuits élémentaires 10 associés à deux chambres de combustion adjacentes débouchent conjointement dans une même galerie collectrice 19 s ' étendant transversalement entre les deux chambres de combustion. Par ailleurs, les deux circuits 10 mettre en communication les chambres d'eau il par deux passages un passage 18 s ' étendant sensiblement dans l'axe longitudinal de la culasse 1 et un passage 17 servant plus particulièrement au dégazage des circuits qui s'étend à l'opposé des passages 14, 15, 16 de montée d'eau pour déboucher sur la face latérale admission adjacente de la culasse par un orifice 21 distinct de l'orifice 20.The two elementary circuits 10 associated with two adjacent combustion chambers open out jointly into the same collecting gallery 19 extending transversely between the two combustion chambers. Furthermore, the two circuits 10 put the water chambers into communication there by two passages a passage 18 extending substantially in the longitudinal axis of the cylinder head 1 and a passage 17 serving more particularly for degassing of the circuits which extends opposite the passages 14, 15, 16 for raising the water to lead to the adjacent intake side face of the cylinder head by an orifice 21 distinct from the orifice 20.
Pour favoriser la circulation du liquide de refroidissement dans les passages de montée d'eau 14, 15, 16 et donc obtenir un refroidissement performant des guides et des soupapes d'échappement, un orifice 12 d'entrée d'eau de section adaptée est disposé sensiblement à la verticale de chacun des passages de montée d'eau.To promote the circulation of the coolant in the rising water passages 14, 15, 16 and therefore obtain efficient cooling of the guides and the exhaust valves, a water inlet orifice 12 of suitable section is arranged. substantially vertical to each of the rising water passages.
Bien entendu, l'invention n'est nullement limitée au mode de réalisation décrit et illustré qui n'a été donné qu'à titre d'exemple.Of course, the invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example.
Au contraire, l'invention comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci sont effectuées suivant son esprit . On the contrary, the invention includes all the technical equivalents of the means described and their combinations if these are carried out according to the spirit.

Claims

REVENDICATIONS
[I] Culasse (1) pour moteur à combustion interne refroidie par liquide, comportant des conduits d'admission (6) et d'échappement (7) débouchant à travers les parois (3) des chambres de combustion ménagées sur sa face inférieure par des orifices[I] Cylinder head (1) for a liquid-cooled internal combustion engine, comprising intake (6) and exhaust (7) conduits opening through the walls (3) of the combustion chambers provided on its underside by orifices
(4,5) coopérant avec des soupapes à tige et un circuit (10) pour le liquide de refroidissement destiné notamment à refroidir lesdites parois (3) des chambres de combustion, caractérisée en ce que le circuit (10) de refroidissement comporte des passages (14,15,16) de montée d'eau qui s'étendent sensiblement parallèlement aux logements (9) prévus pour les tiges des soupapes d'échappement.(4,5) cooperating with rod valves and a circuit (10) for the cooling liquid intended in particular to cool said walls (3) of the combustion chambers, characterized in that the cooling circuit (10) comprises passages (14,15,16) of rising water which extend substantially parallel to the housings (9) provided for the stems of the exhaust valves.
[2] Culasse (1) pour moteur à combustion interne refroidie par liquide selon la revendication 1, caractérisée en ce que, pour chaque chambre de combustion, le circuit (10) du liquide de refroidissement comprend des orifices (12) d'entrée d'eau débouchant sur la face inférieure (2) de la culasse, une chambre d'eau[2] Cylinder head (1) for a liquid-cooled internal combustion engine according to claim 1, characterized in that, for each combustion chamber, the circuit (10) of the cooling liquid comprises orifices (12) for inlet d water opening onto the underside (2) of the cylinder head, a water chamber
(II) s ' étendant à la périphérie des parois (3) de la chambre de combustion, des passages (14,15,16) de montée d'eau s ' étendant sensiblement parallèlement et à proximité des logements (9) des tiges de soupapes d'échappement et une galerie collectrice (19) s ' étendant transversalement en partie haute de la culasse (1) pour déboucher sur la face latérale admission de la culasse (1) par un orifice (20) de sortie d'eau.(II) extending to the periphery of the walls (3) of the combustion chamber, passages (14,15,16) for rising water extending substantially parallel and close to the housings (9) of the rods of exhaust valves and a collecting gallery (19) extending transversely in the upper part of the cylinder head (1) to open onto the intake side face of the cylinder head (1) through a water outlet orifice (20).
[3] Culasse (1) pour moteur à combustion interne refroidie par liquide selon la revendication 2, caractérisée en ce que la chambre d'eau (11) disposée à la périphérie des parois (3) d'une chambre de combustion correspondante s'étend sensiblement parallèlement à la face inférieure (2) de la culasse (1) .[3] Cylinder head (1) for a liquid-cooled internal combustion engine according to claim 2, characterized in that the chamber water (11) arranged at the periphery of the walls (3) of a corresponding combustion chamber extends substantially parallel to the lower face (2) of the cylinder head (1).
[4] Culasse (1) pour moteur à combustion interne refroidie par liquide selon la revendication 3, caractérisée en ce que la chambre d'eau (11) disposée à la périphérie des parois (3) d'une chambre de combustion correspondante est de forme sensiblement torique.[4] Cylinder head (1) for a liquid-cooled internal combustion engine according to claim 3, characterized in that the water chamber (11) arranged at the periphery of the walls (3) of a corresponding combustion chamber is of substantially toric shape.
[5] Culasse (1) pour moteur à combustion interne refroidie par liquide selon l'une quelconque des revendications 2 à 4, caractérisée en ce que les passages (14,15,16) de montée d'eau quittent la chambre d'eau (11) en entourant partiellement les orifices d'échappement (5) ménagés à travers les parois (3) de la chambre de combustion correspondante.[5] Cylinder head (1) for a liquid-cooled internal combustion engine according to any one of claims 2 to 4, characterized in that the water rising passages (14,15,16) leave the water chamber (11) by partially surrounding the exhaust orifices (5) provided through the walls (3) of the corresponding combustion chamber.
[6] Culasse (1) pour moteur à combustion interne refroidie par liquide selon l'une quelconque des revendications 2 à 5, caractérisée en ce que chaque chambre de combustion coopérant avec une bougie d'allumage venant se loger dans un puits (13) traversant verticalement la culasse (1) , tout ou partie des passages (14,16) de montée d'eau correspondant s ' étendent à proximité dudit puits de bougie (13) notamment dans la partie inférieure de ce dernier de façon à refroidir le voisinage des électrodes de la bougie.[6] Cylinder head (1) for a liquid-cooled internal combustion engine according to any one of claims 2 to 5, characterized in that each combustion chamber cooperating with a spark plug which is housed in a well (13) vertically crossing the cylinder head (1), all or part of the corresponding water rise passages (14,16) extend close to said spark plug well (13) particularly in the lower part of the latter so as to cool the vicinity spark plug electrodes.
[7] Culasse (1) pour moteur à combustion interne refroidie par liquide selon l'une quelconque des revendications 2 à 6, caractérisée en ce que, chaque chambre de combustion coopérant avec deux soupapes d'échappement, les passages de montée d'eau correspondant sont alors au nombre de trois, à savoir un passage central (15) s ' étendant entre les deux logements (9) prévus pour le passage des tiges d'échappement et deux passages latéraux (14,16) s 'étendant de façon sensiblement incurvée de part et d'autre desdits logements (9) .[7] Cylinder head (1) for a liquid-cooled internal combustion engine according to any one of claims 2 to 6, characterized in that, each combustion chamber cooperating with two exhaust valves, the corresponding water rise passages are then three in number, namely a central passage (15) extending between the two housings (9) provided for the passage of the exhaust rods and two lateral passages (14,16) extending in a substantially curved manner on either side of said housings (9).
[8] Culasse (1) pour moteur à combustion interne refroidie par liquide selon l'une quelconque des revendications 2 à 7, caractérisée en ce que les passages (14,15,16) de montée d'eau associés à deux chambres de combustion adjacentes débouchent dans une même galerie collectrice (19) s ' étendant transversalement entre les deux chambres de combustion.[8] Cylinder head (1) for a liquid-cooled internal combustion engine according to any one of claims 2 to 7, characterized in that the water rise passages (14,15,16) associated with two combustion chambers adjacent ones open into the same collecting gallery (19) extending transversely between the two combustion chambers.
[9] Culasse (1) pour moteur à combustion interne refroidie par liquide selon l'une quelconque des revendications 2 à 8, caractérisée en ce que chaque chambre d'eau (11) coopère avec un passage de dégazage (17) s ' étendant à l'opposé des passages (14,15,16) de montée d'eau, ledit passage de dégazage (17) débouchant sur la face latérale admission adjacente de la culasse (1) .[9] Cylinder head (1) for a liquid-cooled internal combustion engine according to any one of claims 2 to 8, characterized in that each water chamber (11) cooperates with a degassing passage (17) extending opposite the water rising passages (14,15,16), said degassing passage (17) opening onto the adjacent intake side face of the cylinder head (1).
[10] Culasse (1) pour moteur à combustion interne refroidie par liquide selon les revendications 8 et 9, caractérisée en ce que les deux chambres d'eau (11) s ' étendant à la périphérie de deux chambres de combustion adjacentes sont reliées entre elles par au moins un passage de dégazage (17) débouchant en partie basse de la face latérale admission de la culasse (1) par un orifice de sortie spécifique (21) . [11] Culasse (1) pour moteur à combustion interne refroidie par liquide selon l'une quelconque des revendications 2 à 10, caractérisée en ce que des orifices (12) d'entrée d'eau de section adaptée débouchent dans chaque chambre d'eau (11) sensiblement à la verticale des passages[10] Cylinder head (1) for a liquid-cooled internal combustion engine according to claims 8 and 9, characterized in that the two water chambers (11) extending to the periphery of two adjacent combustion chambers are connected between they through at least one degassing passage (17) opening into the lower part of the intake side face of the cylinder head (1) through a specific outlet orifice (21). [11] Cylinder head (1) for a liquid-cooled internal combustion engine according to any one of claims 2 to 10, characterized in that water inlet orifices (12) of suitable section open into each chamber. water (11) substantially vertically of the passages
(14,15,16) de montée d'eau. (14,15,16) of water rise.
PCT/FR1999/002928 1998-12-04 1999-11-26 Internal combustion engine cylinder head cooled with liquid WO2000034640A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99956155A EP1135587B1 (en) 1998-12-04 1999-11-26 Internal combustion engine cylinder head cooled with liquid
DE69910249T DE69910249T2 (en) 1998-12-04 1999-11-26 CYLINDER HEAD FOR A LIQUID-COOLED INTERNAL COMBUSTION ENGINE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9815331A FR2786815B1 (en) 1998-12-04 1998-12-04 CYLINDER HEADS OF LIQUID COOLED INTERNAL COMBUSTION ENGINE
FR98/15331 1998-12-04

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WO2000034640A1 true WO2000034640A1 (en) 2000-06-15

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DE (1) DE69910249T2 (en)
ES (1) ES2200570T3 (en)
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Publication number Priority date Publication date Assignee Title
DE102006036422A1 (en) * 2006-08-04 2008-02-21 Bayerische Motoren Werke Ag Liquid cooled cylinder head for an internal combustion engine
DE102010036392B4 (en) * 2010-07-14 2021-10-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Liquid-cooled cylinder head for an internal combustion engine
AT517127B1 (en) 2015-05-07 2019-12-15 Avl List Gmbh CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2452999A1 (en) * 1974-11-08 1976-05-13 Motoren Werke Mannheim Ag Water cooled cylinder head especially for diesel engines - has upper and lower cooling chambers are joined by annular gap around injector tube boring (NL110576)
US4957068A (en) * 1988-06-09 1990-09-18 Daimler-Benz Ag Liquid-cooled four-valve cylinder head for a multi-cylinder internal combustion engine
EP0448525A1 (en) * 1990-03-20 1991-09-25 FIAT AUTO S.p.A. Cooling circuit of a cylinder head for internal combustion engine
FR2682994A1 (en) * 1991-10-25 1993-04-30 Renault Liquid-cooling circuit for an internal combustion engine
DE19640122C1 (en) * 1996-09-28 1998-01-29 Audi Ag Cylinder head cooling device for multi=cylinder internal combustion engine in V=formation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2452999A1 (en) * 1974-11-08 1976-05-13 Motoren Werke Mannheim Ag Water cooled cylinder head especially for diesel engines - has upper and lower cooling chambers are joined by annular gap around injector tube boring (NL110576)
US4957068A (en) * 1988-06-09 1990-09-18 Daimler-Benz Ag Liquid-cooled four-valve cylinder head for a multi-cylinder internal combustion engine
EP0448525A1 (en) * 1990-03-20 1991-09-25 FIAT AUTO S.p.A. Cooling circuit of a cylinder head for internal combustion engine
FR2682994A1 (en) * 1991-10-25 1993-04-30 Renault Liquid-cooling circuit for an internal combustion engine
DE19640122C1 (en) * 1996-09-28 1998-01-29 Audi Ag Cylinder head cooling device for multi=cylinder internal combustion engine in V=formation

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EP1135587B1 (en) 2003-08-06
FR2786815B1 (en) 2001-01-05
FR2786815A1 (en) 2000-06-09
DE69910249T2 (en) 2004-04-15
DE69910249D1 (en) 2003-09-11
EP1135587A1 (en) 2001-09-26
ES2200570T3 (en) 2004-03-01

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