EP1020630A1 - Cylinder head for an internal combustion engine - Google Patents
Cylinder head for an internal combustion engine Download PDFInfo
- Publication number
- EP1020630A1 EP1020630A1 EP00400027A EP00400027A EP1020630A1 EP 1020630 A1 EP1020630 A1 EP 1020630A1 EP 00400027 A EP00400027 A EP 00400027A EP 00400027 A EP00400027 A EP 00400027A EP 1020630 A1 EP1020630 A1 EP 1020630A1
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- EP
- European Patent Office
- Prior art keywords
- cylinder head
- intake
- plane
- exhaust
- longitudinal
- 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.)
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Classifications
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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
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- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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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
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
Definitions
- the present invention relates to a combustion engine cylinder head internal and more particularly a petrol or diesel engine of the two intake valves and at least one, preferably two, valves exhaust by combustion chamber.
- this movement will be of swirl type, i.e. having an axis of rotation parallel to the axis of the cylinders.
- This type of movement is obtained, in a known manner, by using specific configurations of the intake ducts (pipes helical) or by using devices inside said conduits, such obstacles.
- Patent DE 19534904 describes, for this purpose, a cylinder head cross flow type with two intake ducts per combustion and two exhaust pipes, the intake ports and exhaust extending respectively on either side of the plane longitudinal median of the breech.
- the two intake ducts are located transversely from the inlet side face, towards the combustion chamber.
- the first conduit extends between the two planes transverse delimiting the combustion chamber, while the second duct leads to the intake side, crossing one of these planes and bypassing the housing with a cylinder head fixing screw.
- This type of solution guarantees a high level of swirl but remains limited to the level of permeability due to the strong curvature of the second intake duct.
- the object of the present invention is therefore to remedy these disadvantages of offering an internal combustion engine cylinder head comprising at least one combustion chamber cooperating with two intake ducts extending transversely from a side face intake to said combustion chamber and the drawing of which ensures, without artifices, both a high level of swirl and excellent permeability.
- a first conduit intake extends from a first inlet port located between the transverse planes delimiting the combustion chamber, to open by a first inlet orifice, formed on one side with respect to the plane longitudinal median of said cylinder head and a second intake duct extends from a second inlet orifice situated outside said planes transverse to a second intake port, located on the side opposite the first intake port with respect to said longitudinal median plane or substantially to the right of said median plane.
- the second orifice intake is arranged substantially symmetrical to the first inlet port, relative to the longitudinal median plane.
- the orifices on the same side with respect to the median plane transverse to the combustion chamber.
- the first orifice of admission is arranged substantially at the level of the transverse median plane.
- the second orifice intake is located substantially to the right of the longitudinal plane.
- the cylinder head comprises one exhaust duct per combustion chamber.
- the cylinder head comprises two exhaust ducts extending transversely to the longitudinal plane, between transverse planes, from a lateral face exhaust to the combustion chamber and opening through exhaust ports, arranged substantially symmetrically opposite screws of the intake ports, with respect to the transverse median plane.
- the cylinder head comprises two exhaust ducts extending transversely to the longitudinal plane between the transverse planes, from a lateral face exhaust to the combustion chamber, and the first of which leads exhaust outlet, through a first exhaust port, located on the transverse median plane, and diametrically opposite, with respect to said longitudinal plane, at the orifice of the first intake duct and the second exhaust pipe opens out, through a second exhaust port, located substantially on said longitudinal plane, and diametrically opposite, with respect to said transverse median plane, at the orifice of the duct of admission.
- the conduits are of helical or tangential type.
- the cylinder head is of the type cross flow.
- a cylinder head 1 of the type cross flow, of an internal combustion engine, of petrol or diesel type, has at least one combustion chamber 2.
- This combustion chamber 2 is located along the median plane longitudinal X-X of the cylinder head. It has two intake ducts 4, 5 and two exhaust ducts 6, 7, intended to open into said combustion chamber.
- the intake ducts can be of the type tangential or helical.
- Each of the conduits 4, 5, 6, 7 is terminated by an orifice specific, respectively 41, 51, 61, 71 provided with an attached seat, formed by a ring, not shown, positioned in a suitable housing machined in the cylinder head.
- a valve can be applied to each of these seats, not shown, integral with a rod slidably mounted in a guide valve, carried by the cylinder head.
- the median plane transverse of this chamber is marked 10.
- the two intake ducts 4, 5 extend transversely from an inlet side face 11 towards the combustion chamber 2.
- the first intake duct 4 extends, from a first orifice entrance located between the transverse planes 8 and 9, towards one side of the plane longitudinal X-X.
- the orifice 41 of this conduit is located between this side of the plane longitudinal X-X and one side of the transverse median plane 10.
- the second intake duct 5 extends from a second orifice entrance, not shown and located outside planes 8 and 9, towards the other side of the longitudinal plane X-X, in relation to conduit 4.
- the orifice intake 51 of this duct is between this other side of the plane longitudinal X-X and the same side as the first inlet port 41 of the transverse median plane 10, inside the transverse planes 8 and 9.
- the conduit 5 bypasses the housing 12 with a fixing screw of the cylinder head located in plane 8, with a relatively radius of curvature Student.
- the orifices 41 and 51 of the intake ducts 4 and 5 are located therefore, substantially symmetrical with respect to the median plane longitudinal X-X and on the same side with respect to the transverse median plane 10 of the combustion chamber 2.
- the exhaust ducts 6 and 7 extend transversely by relation to the longitudinal plane X-X, between the transverse planes 8 and 9, from an exhaust side face 13 towards the combustion chamber 2.
- the exhaust ports 61 and 71 of said conduits are located the other side of the plane 10, relative to the orifices 41 and 51. These orifices exhaust are therefore arranged in a substantially symmetrical manner at the intake ports 41 and 51, with respect to the transverse median plane 10.
- the two intake ducts 4, 5 extend transversely from the face inlet side 11 to combustion chamber 2.
- the first intake duct 4 extends from a first non-inlet inlet represented and located between the transverse planes 8 and 9, towards the plane longitudinal X-X, substantially following the direction of the median plane transverse 10.
- the inlet 41 of this duct is located on one side from the X-X plane, substantially in line with the transverse median plane 10.
- the second intake duct 5 extends from a second orifice entrance, not shown and located outside planes 8 and 9, towards the plan longitudinal X-X.
- the intake port 51 of this conduit is located substantially in line with the longitudinal plane X-X, on one side of the median plane transverse 10.
- the inlet ports 41 and 51 are therefore located respectively on the transverse median plane 10 and on the longitudinal plane X-X, with a angular deviation, from said orifice 41 to said orifice 51, substantially 90 degrees according to the trigonometric direction.
- the exhaust ducts 6 and 7 extend transversely by relation to the longitudinal plane X-X, between the transverse planes 8 and 9, from the exhaust side face 13 towards the combustion chamber 2.
- the exhaust port 61 of the conduit 6 is located to the right of the median plane transverse 10, diametrically opposite, with respect to the longitudinal plane X-X, to the first intake port 41.
- the exhaust port 71 of the exhaust duct 7 is located substantially in line with the plane longitudinal X-X, diametrically opposite, with respect to the median plane transverse 10, to the orifice 51 of the intake duct 5.
- the arrangement of the intake ducts, as well as that of the orifices of said conduits in the exemplary embodiments of cylinder heads conforming to the invention not only ensures a high level of swirl, but also, by their low curvature, significant permeability. This permeability thus ensures optimal filling of the combustion chamber, directly influencing engine performance.
- the invention is not limited to the embodiment previously described but includes alternative embodiments. So the cylinder head can be cross flow type or not. In an example of embodiment, the cylinder head according to the invention can be provided with a single exhaust duct. Finally, the internal combustion engine, comprising a cylinder head according to the invention, can be two or four time, direct injection or not.
- the invention includes any cylinder head comprising two intake ducts, per combustion chamber, extending transversely from a lateral face towards the corresponding combustion, of which the first conduit, extending between the transverse planes delimiting the combustion chamber, leads by a intake opening on one side with respect to the median plane longitudinal of the cylinder head, and whose second conduit, extending from a inlet orifice located outside one of the transverse planes, opens through an intake port located inside the transverse planes and the side opposite the first intake port relative to the median plane longitudinal of said cylinder head.
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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
Description
La présente invention concerne une culasse de moteur à combustion interne et plus particulièrement un moteur essence ou diesel du type à deux soupapes d'admission et au moins une, de préférence deux, soupapes d'échappement par chambre de combustion.The present invention relates to a combustion engine cylinder head internal and more particularly a petrol or diesel engine of the two intake valves and at least one, preferably two, valves exhaust by combustion chamber.
Dans le but de favoriser le développement de la combustion pour optimiser les performances des moteurs à combustion interne, en respectant les normes de pollution comme de niveau sonore, il est nécessaire de générer un mouvement aérodynamique ordonné dans le mélange admis dans les chambres de combustion. Préférentiellement, ce mouvement sera de type swirl, c'est à dire ayant un axe de rotation parallèle à l'axe des cylindres.In order to promote the development of combustion for optimize the performance of internal combustion engines, respecting the standards of pollution as of noise level, it is necessary to generate an orderly aerodynamic movement in the mixture admitted into the combustion chambers. Preferably, this movement will be of swirl type, i.e. having an axis of rotation parallel to the axis of the cylinders.
Ce type de mouvement est obtenu, de façon connue, en utilisant des configurations particulières des conduits d'admission (pipes hélicoïdales) ou en utilisant des artifices à l'intérieur desdits conduits, tels des obstacles.This type of movement is obtained, in a known manner, by using specific configurations of the intake ducts (pipes helical) or by using devices inside said conduits, such obstacles.
Cependant, la génération d'un fort niveau de swirl implique une perte de la perméabilité des conduits, c'est-à-dire, pour des conditions extérieures identiques, une diminution du remplissage et donc une perte de performance du moteur ainsi qu'une surconsommation de carburant. Il devient donc particulièrement important de réaliser des conduits dont le dessin garantit d'une part une perméabilité satisfaisante et d'autre part un haut niveau de swirl.However, generating a high level of swirl implies a loss of permeability of conduits, that is, for conditions identical exterior, a reduction in filling and therefore a loss of engine performance as well as overconsumption of fuel. he therefore becomes particularly important to produce conduits whose design guarantees on the one hand a satisfactory permeability and on the other hand a high level of swirl.
Le brevet DE 19534904 décrit, dans cet objectif, une culasse de type cross flow comportant deux conduits d'admission par chambre de combustion et deux conduits d'échappement, les orifices d'admission et d'échappement s'étendant respectivement de part et d'autre du plan longitudinal médian de la culasse. Les deux conduits d'admission se situent transversalement depuis la face latérale d'admission, vers la chambre de combustion. Le premier conduit s'étend entre les deux plans transversaux délimitant la chambre de combustion, alors que le second conduit débouche sur la face admission, en traversant l'un de ces plans et en contournant le logement d'une vis de fixation culasse.Patent DE 19534904 describes, for this purpose, a cylinder head cross flow type with two intake ducts per combustion and two exhaust pipes, the intake ports and exhaust extending respectively on either side of the plane longitudinal median of the breech. The two intake ducts are located transversely from the inlet side face, towards the combustion chamber. The first conduit extends between the two planes transverse delimiting the combustion chamber, while the second duct leads to the intake side, crossing one of these planes and bypassing the housing with a cylinder head fixing screw.
Ce type de solution garantit un niveau de swirl important mais reste limité au niveau de la perméabilité du fait de la forte courbure du second conduit d'admission.This type of solution guarantees a high level of swirl but remains limited to the level of permeability due to the strong curvature of the second intake duct.
La présente invention a donc pour objet de remédier à ces inconvénients en proposant une culasse de moteur à combustion interne comportant au moins une chambre de combustion coopérant avec deux conduits d'admission s'étendant transversalement depuis une face latérale d'admission vers ladite chambre de combustion et dont le dessin assure, sans artifices, à la fois un fort niveau de swirl et une excellente perméabilité.The object of the present invention is therefore to remedy these disadvantages of offering an internal combustion engine cylinder head comprising at least one combustion chamber cooperating with two intake ducts extending transversely from a side face intake to said combustion chamber and the drawing of which ensures, without artifices, both a high level of swirl and excellent permeability.
Selon une caractéristique de l'invention, un premier conduit d'admission s'étend, depuis un premier orifice d'entrée situé entre les plans transversaux délimitant la chambre de combustion, pour déboucher par un premier orifice d'admission, ménagé d'un côté par rapport au plan médian longitudinal de ladite culasse et un second conduit d'admission s'étend depuis un second orifice d'entrée situé à l'extérieur desdits plans transversaux vers un second orifice d'admission, situé du côté opposé au premier orifice d'admission par rapport audit plan médian longitudinal ou sensiblement au droit dudit plan médian.According to a characteristic of the invention, a first conduit intake extends from a first inlet port located between the transverse planes delimiting the combustion chamber, to open by a first inlet orifice, formed on one side with respect to the plane longitudinal median of said cylinder head and a second intake duct extends from a second inlet orifice situated outside said planes transverse to a second intake port, located on the side opposite the first intake port with respect to said longitudinal median plane or substantially to the right of said median plane.
Selon une autre caractéristique de l'invention, le second orifice d'admission est disposé de manière sensiblement symétrique au premier orifice d'admission, par rapport au plan médian longitudinal. According to another characteristic of the invention, the second orifice intake is arranged substantially symmetrical to the first inlet port, relative to the longitudinal median plane.
Selon une autre caractéristique de l'invention, les orifices d'admission sont disposés d'un même côté par rapport au plan médian transversal de la chambre de combustion.According to another characteristic of the invention, the orifices on the same side with respect to the median plane transverse to the combustion chamber.
Selon une autre caractéristique de l'invention, le premier orifice d'admission est disposé sensiblement au droit du plan médian transversal.According to another characteristic of the invention, the first orifice of admission is arranged substantially at the level of the transverse median plane.
Selon une autre caractéristique de l'invention, le second orifice d'admission est situé sensiblement au droit du plan longitudinal.According to another characteristic of the invention, the second orifice intake is located substantially to the right of the longitudinal plane.
Selon une autre caractéristique de l'invention, la culasse comporte un conduit d'échappement par chambre de combustion.According to another characteristic of the invention, the cylinder head comprises one exhaust duct per combustion chamber.
Selon une autre caractéristique de l'invention, la culasse comporte deux conduits d'échappement s'étendant transversalement par rapport au plan longitudinal, entre les plans transversaux, depuis une face latérale d'échappement vers la chambre de combustion et débouchant par des orifices d'échappement, disposés de manière sensiblement symétrique vis à vis des orifices d'admission, par rapport au plan médian transversal.According to another characteristic of the invention, the cylinder head comprises two exhaust ducts extending transversely to the longitudinal plane, between transverse planes, from a lateral face exhaust to the combustion chamber and opening through exhaust ports, arranged substantially symmetrically opposite screws of the intake ports, with respect to the transverse median plane.
Selon une autre caractéristique de l'invention, la culasse comporte deux conduits d'échappement s'étendant transversalement par rapport au plan longitudinal entre les plans transversaux, depuis une face latérale d'échappement vers la chambre de combustion, et dont le premier conduit d'échappement débouche, par un premier orifice d'échappement, situé sur le plan médian transversal, et diamétralement opposé, par rapport audit plan longitudinal, à l'orifice du premier conduit d'admission et le second conduit d'échappement débouche, par un second orifice d'échappement, situé sensiblement sur ledit plan longitudinal, et diamétralement opposé, par rapport audit plan médian transversal, à l'orifice du conduit d' admission.According to another characteristic of the invention, the cylinder head comprises two exhaust ducts extending transversely to the longitudinal plane between the transverse planes, from a lateral face exhaust to the combustion chamber, and the first of which leads exhaust outlet, through a first exhaust port, located on the transverse median plane, and diametrically opposite, with respect to said longitudinal plane, at the orifice of the first intake duct and the second exhaust pipe opens out, through a second exhaust port, located substantially on said longitudinal plane, and diametrically opposite, with respect to said transverse median plane, at the orifice of the duct of admission.
Selon une autre caractéristique de l'invention, les conduits d'admission sont de type hélicoïdal ou tangentiel. According to another characteristic of the invention, the conduits are of helical or tangential type.
Selon une autre caractéristique de l'invention, la culasse est de type cross flow.According to another characteristic of the invention, the cylinder head is of the type cross flow.
D'autres avantages et caractéristiques de l'invention seront mis en évidence dans la description suivante, donnée à titre d'exemple, en référence aux dessin annexés où :
- la figure 1 représente une vue de dessus d'une chambre de combustion dans un cylindre dans un premier mode de réalisation d'une culasse conforme à l'invention.
- la figure 2 représente une vue de dessus d'une chambre de combustion dans un cylindre dans un second mode de réalisation d'une culasse conforme à l'invention.
- Figure 1 shows a top view of a combustion chamber in a cylinder in a first embodiment of a cylinder head according to the invention.
- 2 shows a top view of a combustion chamber in a cylinder in a second embodiment of a cylinder head according to the invention.
Conformément à ces figures, seules les parties constitutives nécessaires à la compréhension de l'invention ont été représentées.In accordance with these figures, only the constituent parts necessary for understanding the invention have been shown.
Telle que représentée aux figures 1 et 2, une culasse 1, de type
cross flow, d'un moteur à combustion interne, de type essence ou diesel,
comporte au moins une chambre de combustion 2.As shown in Figures 1 and 2, a cylinder head 1, of the type
cross flow, of an internal combustion engine, of petrol or diesel type,
has at least one
Cette chambre de combustion 2 est située le long du plan médian
longitudinal X-X de la culasse. Elle comporte deux conduits d'admission
4, 5 et deux conduits d'échappement 6, 7, destinés à déboucher dans ladite
chambre de combustion. Les conduits d'admission peuvent être de type
tangentiel ou hélicoïdal.This
Chacun des conduits 4, 5, 6, 7 est terminé par un orifice
spécifique, respectivement 41, 51, 61, 71 muni d'un siège rapporté, formé
par une bague, non représentée, positionnée dans un logement adéquat
usiné dans la culasse. Each of the
Sur chacun de ces sièges peut s'appliquer une soupape, non représentée, solidaire d'une tige montée coulissante dans un guide de soupape, porté par la culasse.A valve can be applied to each of these seats, not shown, integral with a rod slidably mounted in a guide valve, carried by the cylinder head.
Tels que représentés à la figure 1, deux plans transversaux 8 et 9,
passant, à titre d'exemple, par les logements des vis de fixation de la
culasse, délimitent la chambre de combustion 2. Le plan médian
transversal de cette chambre est repéré 10.As shown in FIG. 1, two
Les deux conduits d'admission 4, 5 s'étendent transversalement
depuis une face latérale d'admission 11 vers la chambre de combustion 2.
Le premier conduit d'admission 4 s'étend, depuis un premier orifice
d'entrée situé entre les plans transversaux 8 et 9, vers un côté du plan
longitudinal X-X. L'orifice 41 de ce conduit se situe entre ce côté du plan
longitudinal X-X et un côté du plan médian transversal 10.The two
Le second conduit d'admission 5 s'étend, depuis un second orifice
d'entrée, non représenté et situé à l'extérieur des plans 8 et 9, vers l'autre
côté du plan longitudinal X-X, par rapport au conduit 4. L'orifice
d'admission 51 de ce conduit se situe entre cet autre côté du plan
longitudinal X-X et le même côté que le premier orifice d'admission 41 du
plan médian transversal 10, à l'intérieur des plans transversaux 8 et 9. De
cette manière, le conduit 5 contourne le logement 12 d'une vis de fixation
de la culasse située dans le plan 8, avec un rayon de courbure relativement
élevé.The
Les orifices 41 et 51 des conduits d'admission 4 et 5 se situent
donc, de manière sensiblement symétrique par rapport au plan médian
longitudinal X-X et du même côté par rapport au plan médian transversal
10 de la chambre de combustion 2.The
Les conduits d'échappement 6 et 7 s'étendent transversalement par
rapport au plan longitudinal X-X, entre les plans transversaux 8 et 9,
depuis une face latérale d'échappement 13 vers la chambre de combustion
2. Les orifices d 'échappement 61 et 71 desdits conduits se situent de
l'autre côté du plan 10, par rapport aux orifices 41 et 51. Ces orifices
d'échappement sont donc disposés de manière sensiblement symétrique
aux orifices d'admission 41 et 51, par rapport au plan médian transversal
10.The exhaust ducts 6 and 7 extend transversely by
relation to the longitudinal plane X-X, between the
Dans l'exemple de réalisation représenté sur la figure 2, les deux
conduits d'admission 4, 5 s'étendent transversalement depuis la face
latérale d'admission 11 vers la chambre de combustion 2. Le premier
conduit d'admission 4 s'étend, depuis un premier orifice d'entrée non
représenté et situé entre les plans transversaux 8 et 9, vers le plan
longitudinal X-X, en suivant sensiblement la direction du plan médian
transversal 10. L'orifice d'admission 41 de ce conduit se situe d'un côté
du plan X-X, sensiblement au droit du plan médian transversal 10.In the embodiment shown in Figure 2, the two
Le second conduit d'admission 5 s'étend, depuis un second orifice
d'entrée, non représenté et situé en dehors des plans 8 et 9, vers le plan
longitudinal X-X. L'orifice d'admission 51 de ce conduit se situe
sensiblement au droit du plan longitudinal X-X, d'un côté du plan médian
transversal 10.The
Les orifices d'admission 41 et 51 se situent donc respectivement
sur le plan médian transversal 10 et sur le plan longitudinal X-X, avec un
écart angulaire, dudit orifice 41 audit orifice 51, sensiblement de 90
degrés selon le sens trigonométrique.The
Les conduits d'échappement 6 et 7 s'étendent transversalement par
rapport au plan longitudinal X-X, entre les plans transversaux 8 et 9,
depuis la face latérale d'échappement 13 vers la chambre de combustion 2.
L'orifice d'échappement 61 du conduit 6 se situe au droit du plan médian
transversal 10, diamétralement opposé, par rapport au plan longitudinal X-X,
au premier orifice d'admission 41. L'orifice d'échappement 71 du
conduit d'échappement 7 se situe sensiblement au droit du plan
longitudinal X-X, diamétralement opposé, par rapport au plan médian
transversal 10, à l'orifice 51 du conduit d'admission 5.The exhaust ducts 6 and 7 extend transversely by
relation to the longitudinal plane X-X, between the
La disposition des conduits d'admission, ainsi que celle des orifices desdits conduits dans les exemples de réalisation de culasses conformes à l'invention assurent non seulement un haut niveau de swirl, mais aussi, par leur faible courbure, une perméabilité importante. Cette perméabilité assure ainsi un remplissage optimal de la chambre de combustion, influençant directement les performances du moteur.The arrangement of the intake ducts, as well as that of the orifices of said conduits in the exemplary embodiments of cylinder heads conforming to the invention not only ensures a high level of swirl, but also, by their low curvature, significant permeability. This permeability thus ensures optimal filling of the combustion chamber, directly influencing engine performance.
L'invention ne se limite pas à l'exemple de réalisation précédemment décrit mais englobe des variantes de réalisation. Ainsi, la culasse peut être de type cross flow ou non. Dans un exemple de réalisation, la culasse conforme à l'invention peut être munie d'un seul conduit d'échappement. Enfin, le moteur à combustion interne, comportant une culasse conforme à l'invention, peut être à deux ou quatre temps, à injection directe ou non.The invention is not limited to the embodiment previously described but includes alternative embodiments. So the cylinder head can be cross flow type or not. In an example of embodiment, the cylinder head according to the invention can be provided with a single exhaust duct. Finally, the internal combustion engine, comprising a cylinder head according to the invention, can be two or four time, direct injection or not.
D'une manière générale, l'invention comprend toute culasse comportant deux conduits d'admission, par chambre de combustion, s'étendant transversalement depuis une face latérale vers la chambre de combustion correspondante, dont le premier conduit, s 'étendant entre les plans transversaux délimitant la chambre de combustion, débouche par un orifice d'admission ménagé d'un côté par rapport au plan médian longitudinal de la culasse, et dont le second conduit, s'étendant depuis un orifice d'entrée situé à l'extérieur d'un des plans transversaux, débouche par un orifice d'admission situé à l'intérieur des plans transversaux et du côté opposé au premier orifice d'admission par rapport au plan médian longitudinal de ladite culasse.In general, the invention includes any cylinder head comprising two intake ducts, per combustion chamber, extending transversely from a lateral face towards the corresponding combustion, of which the first conduit, extending between the transverse planes delimiting the combustion chamber, leads by a intake opening on one side with respect to the median plane longitudinal of the cylinder head, and whose second conduit, extending from a inlet orifice located outside one of the transverse planes, opens through an intake port located inside the transverse planes and the side opposite the first intake port relative to the median plane longitudinal of said cylinder head.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR9900372 | 1999-01-15 | ||
FR9900372A FR2788563B1 (en) | 1999-01-15 | 1999-01-15 | INTERNAL COMBUSTION ENGINE CYLINDER HEAD |
Publications (1)
Publication Number | Publication Date |
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EP1020630A1 true EP1020630A1 (en) | 2000-07-19 |
Family
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Application Number | Title | Priority Date | Filing Date |
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EP00400027A Withdrawn EP1020630A1 (en) | 1999-01-15 | 2000-01-07 | Cylinder head for an internal combustion engine |
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EP (1) | EP1020630A1 (en) |
FR (1) | FR2788563B1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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BE778976A (en) * | 1972-02-04 | 1972-05-30 | Berliet Automobiles | CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE, ESPECIALLY FOR A DIESEL ENGINE |
JPS5791320A (en) * | 1980-11-28 | 1982-06-07 | Suzuki Motor Co Ltd | Intake device for internal combustion engine |
EP0603924A1 (en) * | 1992-12-23 | 1994-06-29 | Scania Cv Aktiebolag | Cylinder head for internal combustion engine |
EP0634571A1 (en) * | 1993-05-18 | 1995-01-18 | Mazda Motor Corporation | Intake apparatus of diesel engine |
EP0666409A1 (en) * | 1994-02-04 | 1995-08-09 | Mazda Motor Corporation | Direct injection diesel engine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19534904B4 (en) | 1994-09-29 | 2008-07-17 | Volkswagen Ag | Cylinder head of an internal combustion engine |
-
1999
- 1999-01-15 FR FR9900372A patent/FR2788563B1/en not_active Expired - Fee Related
-
2000
- 2000-01-07 EP EP00400027A patent/EP1020630A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE778976A (en) * | 1972-02-04 | 1972-05-30 | Berliet Automobiles | CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE, ESPECIALLY FOR A DIESEL ENGINE |
JPS5791320A (en) * | 1980-11-28 | 1982-06-07 | Suzuki Motor Co Ltd | Intake device for internal combustion engine |
EP0603924A1 (en) * | 1992-12-23 | 1994-06-29 | Scania Cv Aktiebolag | Cylinder head for internal combustion engine |
EP0634571A1 (en) * | 1993-05-18 | 1995-01-18 | Mazda Motor Corporation | Intake apparatus of diesel engine |
EP0666409A1 (en) * | 1994-02-04 | 1995-08-09 | Mazda Motor Corporation | Direct injection diesel engine |
Also Published As
Publication number | Publication date |
---|---|
FR2788563B1 (en) | 2001-02-09 |
FR2788563A1 (en) | 2000-07-21 |
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