EP1070834B1 - Combustion engine with a spacer on the oil pan - Google Patents
Combustion engine with a spacer on the oil pan Download PDFInfo
- Publication number
- EP1070834B1 EP1070834B1 EP00401948A EP00401948A EP1070834B1 EP 1070834 B1 EP1070834 B1 EP 1070834B1 EP 00401948 A EP00401948 A EP 00401948A EP 00401948 A EP00401948 A EP 00401948A EP 1070834 B1 EP1070834 B1 EP 1070834B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- spacer
- power train
- transmission
- bracket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
- F01M2011/0054—Fastening to the cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
- F01M2011/0058—Fastening to the transmission
Definitions
- the invention relates to a power train for motor vehicle.
- the invention relates more particularly to a group powertrain for a motor vehicle comprising longitudinally, from front to back, a heat engine and a transmission, of the type in which a rear face of a block longitudinal axis of the engine is rigidly connected to one side front of a transmission bell, including a bell for a flywheel, of the type that includes, in the right of a plan fixing an oil pan under the engine block, two horizontal squares, transversely opposed, comprising each a first fixed longitudinal front branch rigidly to the engine block, and a second rear branch cross rigidly attached to the bell to stiffen engine and transmission assembly.
- the attachment points of the engine block on the housing of the transmission are conventionally made in the form screw and nut assemblies.
- the squares must have many anchor points, which makes makes them difficult to assemble and disassemble, both from view of the time devoted to this operation, that of the position of anchor points before mounting.
- the multiplicity of anchor points increases all the number of machining to be performed on the engine block and the bell of the transmission casing, which increases the cost of manufacturing such a block engine and transmission case.
- these squares must be made of a material such as cast iron, which weighs down the group motorpropulseur.
- brackets integrated into an additional element of the engine block.
- brackets is not adapted to hold the bell in position optimally and in particular to absorb torsional stresses to which it is subject.
- the invention proposes a powertrain of the type previously described, comprising a spacer which is interposed vertically between the engine block and the sump, and on which are rigidly fixed the first front branches of the two brackets.
- This spacer advantageously allows to benefit from a increase the engine's lubricating oil capacity and, depending of the form of the spacer, to mount different types of sump on a same engine block.
- each square has the shape of a tetrahedron whose base forms the second branch back of the square, and whose body forms the first branch of the square.
- FIG. 1 shows the whole of a group power train 10 for a motor vehicle realized according to a state of the art.
- the powertrain 10 comprises longitudinally, from front to back, an engine 12 which is coupled to a transmission 14.
- a face rear transverse 16 of a motor unit 18 is rigidly connected to a front face 20 of a bell 22 of a housing (no represented) of the transmission 14.
- the bell 22 is particularly material made with the housing (not shown) of the transmission 14 and is intended to house a flywheel and / or a clutch (not shown) of the power train 10.
- the motor 12 comprises a crankshaft (not shown) which is coupled to a output axis A for driving the transmission 14 of the vehicle.
- the engine block 18 When the vehicle engine is running, the engine block 18 is subject to vibration and is therefore likely to transmit longitudinal bending stresses to the connection between the engine block 18 and the bell 22.
- the crankshaft when, for example during a strong recovery of the engine 12 of the vehicle, the crankshaft is subjected to a couple important, it transmits some of this torque to the engine block 18 of the engine 12 through the bearings that wear it from so that the block 18 is partially rotated around the axis A of the crankshaft and the output shaft of the 12.
- the connection of the engine block 18 to the bell 22 is is then strongly stressed in torsion, which is detrimental to the strength of the power train 10.
- brackets 26 which allow stiffen the assembly of the engine block 18 to the bell 22.
- the engine block 18 being assembled to the bell 22 by through anchor points such as screws and nuts (not shown) arranged regularly on the face rear block 18 of the engine 12, the block fixing means motor 18 on bell 22 do not extend below a plane P for fixing a group oil pan 28 power train 10 under the engine 12.
- the brackets 26 are arranged substantially in line with the P plane of fixation, that is to say the lowest possible relative to the axis A of the crankshaft of the engine 12 so as to ensure a recovery of bending and twisting forces that are transmitted in from block 18 of the engine 12.
- the power train 10 has two opposite squares 26 that are arranged in the plane P, on either side of the axis A of the crankshaft.
- brackets 26 are horizontally oriented and each include a first longitudinal front branch which is fixed on a part in vis-à-vis the corresponding side face 34 of the block 18 of motor 12, and a second transverse rear branch 32 which is fixed on a part opposite the front face 20 of the bell 22 of the transmission 14.
- the first branch before longitudinal 30 presents substantially the shape of a plate that is bolted to means of screw 36 on the corresponding lateral face 34 of the block 18.
- the side face 34 of the engine block 18 is machined to this effect so as to have a flat bearing surface for the first branch before 30 of the square 26.
- the second rear branch 32 is bolted by means of screws 40 on the front face 20 of the transmission bell 22, which is also machined appropriate.
- a reinforcing rib 41 interconnects the first branch before 30 and second rear branch 32.
- a spacer 42 which has brackets 26, is interposed between the block 18 of the engine 12 and the oil sump 28 of the engine 12.
- brackets 26 are integrated in the spacer 42, and they are made from matter with it.
- brackets 26 may, as unrepresented variants, be independent brackets that are attached, in a way analogous to that described with reference to FIG. lateral faces 44 of the spacer 42.
- This arrangement allows in particular, during the assembly of the power train 10, to be able to separately assemble the engine block 18 and its equipment on the one hand, and the spacer 42 and the brackets 26 on the other hand, which represents a saving of time at the time of the final assembly of the engine 12. In the final assembly of the power plant 12, all that remains is to fix the second transverse rear branch 32 of the brackets 26 on the front face 20 of the bell 22 of the transmission 14.
- the maximum rigidity of the final assembly powertrain 10 and minimum assembly time are obtained by producing the spacer 42 and the brackets 26 in one and the same room.
- the spacer 42 presents substantially the shape of a parallelepiped of which one face upper 46 is complementary to the shape of the outline of a lower face 48 of the engine block 18, and a lower face of which 50 is complementary to the shape of the outline of a face upper 52 of the oil sump 28.
- the spacer 42 advantageously allows adaptation of different types of casing from 28 to the same block motor 18, for little, that for each case, be used a spacer 42 of appropriate shape.
- This provision allows to significantly lower the production costs of a chain of engine manufacturing 12 to the extent that it is not necessary to provide engine block 18 corresponding to each type of sump 28, and to the extent that only one 18 "standard motor block can be adapted to different housings of oil 28.
- FIG. 3 illustrates in more detail the forms of the spacer 42.
- contour C 46 complementary to the contour of the corresponding part of the lower face 48 of the motor unit 18 previously described, and the lower face 50 of contour C 50 which is complementary in contour to the corresponding portion of FIG. the upper face 52 of the housing 28.
- the upper faces 46 and lower 50 comprise holes 53 for fixing the spacer 42 on the block motor 18 and on the sump 28.
- the spacer 42 is made in the form of a parallelepiped molded of an aluminum alloy which comprises openings 54 which open between its upper faces 46 and lower 50 to allow the passage of elements (no represented) of a mobile engine 12, in particular balancing weights of a crankshaft of the engine 12 and a motor timing pulley 12.
- brackets 26 are made integrally with the spacer 42.
- each bracket 26 has the shape of a tetrahedron whose base 56 forms the second rear branch 32 of the bracket 26, and whose body 72 forms the first branch before 30 of the square 26.
- the base 56 of each square 26 comprises, at its vertices 58 and 60 farthest from a median plane P ', which is vertical and contains the axis A of the crankshaft previously described, longitudinal holes 62 and 64 for fixing by screwing, using the corresponding screws 66 and 68, the square 26 on a drilled and tapped surface (not shown) of the front face 20 of the bell 22.
- the base 56 of each square is machined to allow a plane fit optimal of these two surfaces.
- each bracket 26 has a recess 70 from the molding of the spacer 42, which allows on the one hand to lighten the spacer 42, and on the other hand to increase the strength of the square 26, a hollow volume being, for a same bending or torsion stress, more resistant than full volume that could crack.
- the spacer 42 makes it possible to stiffen the assembly of the motor 12 with the transmission 14, of simplify the assembly of brackets 26 by reducing the number anchor points involved, and it allows to increase the oil capacity of the engine 12 by adding an oil sump 28 of appropriate volume, which allows, in particular, for a common-purpose passenger vehicle, to lengthen the interval of time between two successive oil changes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Arrangement Of Transmissions (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Lubricants (AREA)
Abstract
Description
L'invention concerne un groupe motopropulseur pour véhicule automobile.The invention relates to a power train for motor vehicle.
L'invention concerne plus particulièrement un groupe motopropulseur pour véhicule automobile comportant longitudinalement, d'avant en arrière, un moteur thermique et une transmission, du type dans lequel une face arrière d'un bloc longitudinal du moteur thermique est liée rigidement à une face avant d'une cloche de la transmission, notamment une cloche pour un volant moteur, du type qui comporte, au droit d'un plan de fixation d'un carter d'huile sous le bloc du moteur, deux équerres horizontales, opposées transversalement, comportant chacune une première branche avant longitudinale fixée rigidement au bloc moteur, et une deuxième branche arrière transversale fixée rigidement à la cloche pour rigidifier l'assemblage du moteur et de la transmission.The invention relates more particularly to a group powertrain for a motor vehicle comprising longitudinally, from front to back, a heat engine and a transmission, of the type in which a rear face of a block longitudinal axis of the engine is rigidly connected to one side front of a transmission bell, including a bell for a flywheel, of the type that includes, in the right of a plan fixing an oil pan under the engine block, two horizontal squares, transversely opposed, comprising each a first fixed longitudinal front branch rigidly to the engine block, and a second rear branch cross rigidly attached to the bell to stiffen engine and transmission assembly.
On connaít de nombreux exemples de groupes motopropulseurs du type décrit précédemment.Many examples of groups are known powertrains of the type described above.
Il s'agit pour la plupart de groupe motopropulseurs dont le moteur thermique est de forte cylindrée et dont l'arbre de sortie, solidaire du vilebrequin, est susceptible d'entraíner la transmission avec un couple important.Most of them are powertrains the engine is of high displacement and the engine shaft exit, secured to the crankshaft, is likely to lead to transmission with a large torque.
Lors du fonctionnement, du fait des vibrations auxquelles est soumis le moteur et, plus généralement, le groupe motopropulseur dans son ensemble, les points de fixation du bloc du moteur sur le carter de la transmission sont soumises à des sollicitations de flexion longitudinale.During operation, because of vibrations to which is subjected the engine and, more generally, the group powerplant as a whole, the attachment points of the engine block on the transmission casing are subject to longitudinal bending stresses.
Par ailleurs, on a aussi constaté que, du fait du frottement qui existe entre les différents paliers du vilebrequin et de l'arbre de sortie, une partie du couple moteur est susceptible d'être partiellement transmise, notamment lors des reprises du moteur, au bloc du moteur thermique sous la forme d'un couple autour de la direction de l'arbre de sortie du moteur, ce qui a pour effet de solliciter en cisaillement les points de fixation du bloc du moteur sur le carter de la transmission, et de solliciter en torsion le carter de la transmission.In addition, it has also been found that friction that exists between the different bearings of the crankshaft and the output shaft, a part of the engine torque is likely to be partially transmitted, in particular during engine recoveries, to the engine block in the form of a couple around the direction of the exit tree of the motor, which has the effect of shearing the fixing points of the engine block on the housing of the transmission, and torsionally urging the casing of the transmission.
Les points de fixation du bloc moteur sur le carter de la transmission sont conventionnellement réalisés sous la forme d'assemblages de vis et d'écrous.The attachment points of the engine block on the housing of the transmission are conventionally made in the form screw and nut assemblies.
Sous l'effet des sollicitations de flexion et des sollicitations dues au couple moteur partiellement transmis au bloc, ces vis et écrous peuvent être amenés à se déformer, ce qui peut avoir pour conséquence de causer des difficultés lorsque, par exemple, on souhaite déposer le moteur du véhicule en le désolidarisant de la transmission.Under the effect of bending stresses and motor torque partially transmitted to the motor block, these screws and nuts may be caused to deform, this which can result in difficulties when, for example, we want to drop the engine of the vehicle by disconnecting it from the transmission.
Par ailleurs, les sollicitations de flexion et de torsion auxquelles peuvent être soumis le bloc moteur et le carter de la transmission peuvent provoquer des déformations des paliers qui guident les éléments tournants du moteur et de la transmission, notamment des paliers de vilebrequin du moteur, un palier de sortie du moteur, et des paliers d'un arbre d'entrée de la transmission.Moreover, the bending and torsion stresses to which the engine block and the crankcase of the transmission can cause deformation of the bearings which guide the rotating elements of the engine and the transmission, including engine crankshaft bearings, an engine output bearing, and bearings of an input shaft of the transmission.
La déformation de ces paliers peut entraíner une usure accélérée des éléments tournants qu'ils portent ainsi que des fuites de lubrifiant.Deformation of these bearings can cause wear accelerated rotating elements they wear as well as lubricant leaks.
Pour remédier à cet inconvénient, on a proposé de fixer entre le bloc moteur et une cloche du carter de la transmission des équerres du type décrit précédemment.To remedy this drawback, it has been proposed to fix between the engine block and a bell of the transmission case brackets of the type described above.
Cette conception permet de rigidifier de façon satisfaisante la liaison entre le bloc moteur et le carter de la transmission, mais elle présente de nombreux inconvénients.This design makes it possible to stiffen satisfactory connection between the engine block and the housing of the transmission, but it has many disadvantages.
Pour réaliser une fixation satisfaisante, les équerres doivent présenter de nombreux points d'ancrage, ce qui rend les rend malaisées à monter et à démonter, tant du point de vue du temps consacré à cette opération, que de la mise en position des points d'ancrage avant montage. To achieve a satisfactory fixation, the squares must have many anchor points, which makes makes them difficult to assemble and disassemble, both from view of the time devoted to this operation, that of the position of anchor points before mounting.
Par ailleurs, la multiplicité des points d'ancrage augmente d'autant le nombre d'usinages devant être réalisés sur le bloc moteur et sur la cloche du carter de transmission, ce qui augmente le coût de fabrication du tel bloc moteur et du carter de transmission.Moreover, the multiplicity of anchor points increases all the number of machining to be performed on the engine block and the bell of the transmission casing, which increases the cost of manufacturing such a block engine and transmission case.
Enfin, pour présenter une résistance satisfaisante, ces équerres doivent être réalisées en un matériau tel que de la fonte, ce qui alourdit le groupe motorpropulseur.Finally, to present a satisfactory resistance, these squares must be made of a material such as cast iron, which weighs down the group motorpropulseur.
Pou remédier à ces inconvénients, le document EP-0 368 478 propose des équerres intégrées à un élément additionnel du bloc moteur. Cependant, la forme des équerres n'est pas adaptée pour maintenir en position la cloche de manière optimale et notamment pour absorber les sollicitations de torsion auxquelles elle est soumise.To overcome these drawbacks, document EP-0 368 478 proposes brackets integrated into an additional element of the engine block. However, brackets is not adapted to hold the bell in position optimally and in particular to absorb torsional stresses to which it is subject.
Dans ce but, l'invention propose un groupe motopropulseur du type décrit précédemment, comportant une entretoise qui est interposée verticalement entre le bloc moteur et le carter d'huile, et sur laquelle sont fixées rigidement les premières branches avant des deux équerres.For this purpose, the invention proposes a powertrain of the type previously described, comprising a spacer which is interposed vertically between the engine block and the sump, and on which are rigidly fixed the first front branches of the two brackets.
Cette entretoise permet avantageusement de bénéficier d'une augmentation de la capacité d'huile de lubrification du moteur et, en fonction de la forme de l'entretoise, de monter différents types de carter d'huile sur un même bloc moteur.This spacer advantageously allows to benefit from a increase the engine's lubricating oil capacity and, depending of the form of the spacer, to mount different types of sump on a same engine block.
Selon l'invention, le groupe motopropulseur se caractérise en ce que chaque équerre présente la forme d'un tétraèdre dont la base forme la deuxième branche arrière de l'équerre, et dont le corps forme la première branche de l'équerre.According to the invention, the powertrain is characterized in that each square has the shape of a tetrahedron whose base forms the second branch back of the square, and whose body forms the first branch of the square.
Selon d'autres caractéristiques de l'invention :
- le corps de chaque équerre comporte un évidement qui débouche dans sa base pour alléger et rigidifier l'équerre,
- les équerres sont réalisées venues de matière avec l'entretoise,
- l'entretoise est obtenue par moulage, notamment d'un alliage d'aluminium,
- l'entretoise parallélépipédique comporte des ouvertures qui débouchent entre ses faces supérieure et inférieure pour permettre le passage d'éléments d'un équipage mobile du moteur.
- the body of each square has a recess which opens into its base to lighten and stiffen the square,
- the brackets are made integrally with the spacer,
- the spacer is obtained by molding, in particular an aluminum alloy,
- the parallelepiped spacer has openings which open between its upper and lower faces to allow the passage of elements of a movable engine.
D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :
- la figure 1 est une vue partielle en perspective d'un groupe motopropulseur selon l'art antérieur comportant des équerres de liaison indépendantes ;
- la figure 2 est une vue partielle en perspective d'un groupe motopropulseur selon l'art antérieur comportant une entretoise selon l'invention ; et
- la figure 3 est une vue en perspective d'une entretoise selon l'invention.
- Figure 1 is a partial perspective view of a powertrain according to the prior art having independent connecting brackets;
- Figure 2 is a partial perspective view of a power unit according to the prior art comprising a spacer according to the invention; and
- Figure 3 is a perspective view of a spacer according to the invention.
Dans la description qui va suivre, des chiffres de référence identiques désignent des éléments identiques ou ayant des fonctions similaires.In the description that follows, figures of identical reference designates identical elements or having similar functions.
On utilisera à titre non limitatif, et en référence aux figures, les termes horizontaux, verticaux, longitudinal, transversal, avant et arrière.We will use without limitation, and with reference to figures, horizontal, vertical, longitudinal, transversal, front and back.
On a représenté à la figure 1 l'ensemble d'un groupe
motopropulseur 10 pour véhicule automobile réalisé
conformément à un état de la technique. FIG. 1 shows the whole of a
De manière connue, le groupe motopropulseur 10
comporte longitudinalement, d'avant en arrière, un moteur
thermique 12 qui est accouplé à une transmission 14. Une face
transversale arrière 16 d'un bloc moteur 18 est liée rigidement
à une face avant 20 d'une cloche 22 d'un carter (non
représenté) de la transmission 14. La cloche 22 est notamment
réalisée venue de matière avec le carter (non représenté) de la
transmission 14 et elle est destinée à abriter un volant moteur
et/ou un embrayage (non représentés) du groupe motopropulseur
10.In known manner, the
De manière connue, le moteur 12 comporte un
vilebrequin (non représenté) qui est accouplé à un arbre de
sortie d'axe A pour l'entraínement de la transmission 14 du
véhicule.In known manner, the
Lorsque le moteur du véhicule fonctionne, le bloc moteur
18 est soumis à des vibrations et est ainsi susceptible de
transmettre des sollicitations de flexion longitudinale à la
liaison entre le bloc moteur 18 et la cloche 22.When the vehicle engine is running, the
Par ailleurs, lorsque, par exemple lors d'une forte reprise
du moteur 12 du véhicule, le vilebrequin est soumis à un couple
important, il transmet une partie de ce couple au bloc moteur
18 du moteur 12 par l'intermédiaire des paliers qui le portent de
sorte que le bloc 18 est partiellement entraíné en rotation
autour de l'axe A du vilebrequin et de l'arbre de sortie du
moteur 12. La liaison du bloc moteur 18 à la cloche 22 se
trouve alors fortement sollicitée en torsion, ce qui est
préjudiciable à la résistance du groupe motopropulseur 10.Moreover, when, for example during a strong recovery
of the
Ainsi, selon la conception connue de l'état de la
technique, il est prévu des équerres 26 qui permettent de
rigidifier l'assemblage du bloc moteur 18 à la cloche 22.So, according to the known conception of the state of the
technical, there are provided
Le bloc moteur 18 étant assemblé à la cloche 22 par
l'intermédiaire de points d'ancrage tel que des vis et des écrous
(non représentés) disposés de façon régulière sur la face
arrière de bloc 18 du moteur 12, les moyens de fixation du bloc
moteur 18 sur la cloche 22 ne s'étendent pas en dessous d'un
plan P de fixation d'un carter d'huile 28 du groupe
motopropulseur 10 sous le moteur 12.The
Les équerres 26 sont agencées sensiblement au droit du
plan P de fixation, c'est-à-dire le plus bas possible par rapport
à l'axe A du vilebrequin du moteur 12 de façon à assurer une
reprise des efforts de flexion et de torsion qui sont transmis en
provenance du bloc 18 du moteur 12. Le groupe motopropulseur
10 comporte deux équerres opposées 26 qui sont
agencées dans le plan P, de part et d'autre de l'axe A du
vilebrequin.The
Comme illustré à la figure 1, les équerres 26 sont
d'orientation horizontale et comportent chacune une première
branche avant 30 longitudinale qui est fixée sur une partie en
vis-à-vis de la face latérale correspondante 34 du bloc 18 du
moteur 12, et une deuxième branche arrière 32 transversale qui
est fixée sur une partie en vis-à-vis de la face avant 20 de la
cloche 22 de la transmission 14.As illustrated in FIG. 1, the
La première branche avant 30 longitudinale présente
sensiblement la forme d'une plaque qui est boulonnée au
moyen de vis 36 sur la face latérale 34 correspondante du bloc
moteur 18. La face latérale 34 du bloc moteur 18 est usinée à
cet effet de façon à disposer d'une surface plane d'appui pour
la première branche avant 30 de l'équerre 26.The first branch before longitudinal 30 presents
substantially the shape of a plate that is bolted to
means of
D'une façon analogue, la deuxième branche arrière 32
est boulonnée au moyen de vis 40 sur la face avant 20 de la
cloche de transmission 22, qui est aussi usinée de façon
appropriée.In a similar way, the second
Enfin, une nervure de renfort 41 relie entre elles les
première branche avant 30 et deuxième branche arrière 32.Finally, a reinforcing
Conformément à l'invention, et comme illustré à la figure
2, une entretoise 42, qui comporte des équerres 26, est
interposée entre le bloc 18 du moteur 12 et le carter d'huile 28
du moteur 12. According to the invention, and as illustrated in FIG.
2, a
Dans le mode de réalisation préféré de l'invention, les
équerres 26 sont intégrées à l'entretoise 42, et elles sont
réalisées venues de matière avec celle-ci.In the preferred embodiment of the invention, the
Cette disposition n'est pas limitative de l'invention, et les
équerres 26 peuvent, à titre de variantes non représentées,
être des équerres indépendantes qui sont fixées, d'une façon
analogue à celle décrite en référence à la figure 1, sur les
faces latérales 44 de l'entretoise 42. Cette disposition permet
notamment, lors de l'assemblage du groupe motopropulseur 10,
de pouvoir assembler séparément le bloc moteur 18 et ses
équipements d'une part, et l'entretoise 42 et les équerres 26
d'autre part, ce qui représente un gain de temps au moment de
l'assemblage final du moteur 12. Lors de l'assemblage final du
groupe motopropulseur 12, il ne reste alors plus qu'à fixer les
deuxième branche arrière transversale 32 des équerres 26 sur
la face avant 20 de la cloche 22 de la transmission 14.This provision is not limiting of the invention, and the
Toutefois, le maximum de rigidité de l'assemblage final
du groupe motopropulseur 10 et un temps de montage minimal
sont obtenus en réalisant l'entretoise 42 et les équerres 26 en
une seule et même pièce.However, the maximum rigidity of the
Conformément à l'invention, l'entretoise 42 présente
sensiblement la forme d'un parallélépipède dont une face
supérieure 46 est complémentaire de la forme du contour d'une
face inférieure 48 du bloc moteur 18, et dont une face inférieure
50 est complémentaire de la forme du contour d'une face
supérieure 52 du carter d'huile 28.According to the invention, the
De cette façon, l'entretoise 42 permet avantageusement
l'adaptation de différents types de carter du 28 au même bloc
moteur 18, pour peu, que pour chaque cas, soit employée une
entretoise 42 de forme appropriée. Cette disposition permet
d'abaisser sensiblement les coûts de production d'une chaíne
de fabrication de moteurs 12 dans la mesure où il n'est pas
nécessaire de prévoir de bloc moteur 18 correspondant à
chaque type de carter d'huile 28, et dans la mesure où un seul
bloc moteur 18 "standard" peut être adapté à différents carters
d'huile 28.In this way, the
Réciproquement, on peut associer un carter d'huile 28
de forme et de capacité adéquate à chaque moteur 12 en
fonction de sa puissance et de ses besoins en lubrification.Conversely, one can associate an
La figure 3 illustre plus en détail les formes de
l'entretoise 42.Figure 3 illustrates in more detail the forms of
the
On a notamment représenté la face supérieure 46, de
contour C46 complémentaire du contour de la partie
correspondante de la face inférieure 48 du bloc moteur 18
précédemment décrite, et la face inférieure 50, de contour C50
complémentaire de contour de la partie correspondante de la
face supérieure 52 du carter du 28.In particular, the
Les faces supérieure 46 et inférieure 50 comportent des
perçages 53 pour la fixation de l'entretoise 42 sur le bloc
moteur 18 et sur le carter d'huile 28.The upper faces 46 and lower 50 comprise
L'entretoise 42 est réalisée sous la forme d'un
parallélépipède moulé en un alliage d'aluminium qui comporte
des ouvertures 54 qui débouchent entre ses faces supérieure
46 et inférieure 50 pour permettre le passage d'éléments (non
représentés) d'un équipage mobile du moteur 12, notamment
des masselottes d'équilibrage d'un vilebrequin du moteur 12 et
une poulie de distribution du moteur 12.The
Conformément à l'invention, les équerres 26 sont
réalisées venues de matière avec l'entretoise 42.According to the invention, the
Dans le mode de réalisation préféré de l'invention,
chaque équerre 26 présente la forme d'un tétraèdre dont la
base 56 forme la deuxième branche arrière 32 de l'équerre 26,
et dont le corps 72 forme la première branche avant 30 de
l'équerre 26.In the preferred embodiment of the invention,
each
La base 56 de chaque équerre 26 comporte, à ses
sommets 58 et 60 les plus éloignés d'un plan médian P', qui est
vertical et contient l'axe A du vilebrequin précédemment décrit,
des perçages longitudinaux 62 et 64 pour la fixation par
vissage, à l'aide de vis 66 et 68 correspondantes, de l'équerre
26 sur une surface percée et taraudée (non représentée) de la
face avant 20 de la cloche 22. À cet effet, la base 56 de chaque
équerre est usinée de façon à permettre un ajustement plan
optimal de ces deux surfaces.The
Enfin, le corps 72 de chaque équerre 26 comporte un
évidement 70 issu du moulage de l'entretoise 42, qui permet
d'une part d'alléger l'entretoise 42, et d'autre part d'accroítre la
résistance de l'équerre 26, un volume creux étant, pour une
même sollicitation de flexion ou de torsion, plus résistant qu'un
volume plein qui risquerait de se fissurer.Finally, the
Ainsi, avantageusement, l'entretoise 42 permet de
rigidifier l'assemblage du moteur 12 à la transmission 14, de
simplifier le montage des équerres 26 en diminuant le nombre
de points d'ancrage mis en jeu, et elle permet d'augmenter la
capacité d'huile du moteur 12 en y adjoignant un carter d'huile
28 de volume approprié, ce qui permet notamment, pour un
véhicule de tourisme d'usage courant, d'allonger l'intervalle de
temps entre deux vidanges successives.Thus, advantageously, the
Claims (7)
- Motor vehicle power train (10) comprising longitudinally, from front to rear, an internal combustion engine (12) and a transmission (14), of the type in which a rear side (16) of a longitudinal block (18) of the internal combustion engine (12) is rigidly connected to a front side (20) of a bell housing (22) of the transmission (14), in particular a bell housing (22) for a flywheel, of the type which comprises, perpendicular to a plane (P) in which a sump (28) is mounted under the block (18) of the engine (12), two transversely opposed, horizontal brackets (26) each comprising a longitudinal front first branch (30) fastened rigidly to the engine block (18), and a transverse rear second branch (32) fastened rigidly to the bell housing (22) to strengthen the assembly of the engine (12) and the transmission (14), the said power train (10) comprising a spacer (42) which is interposed vertically between the engine block (18) and the sump (28) and on which are rigidly fastened the front first branches (30) of the two brackets (26), characterized in that each bracket (26) has the shape of a tetrahedron whose base (56) forms the rear second branch (32) of the bracket (26) and whose body (72) forms the first branch (30) of the bracket (26).
- Power train (10) according to Claim 1, characterized in that the spacer (42) of the sump (28) has approximately the shape of a parallelepiped whose upper side (46) is complementary in shape to the contour of the lower side (48) of the engine block (18) and whose lower side (50) is complementary in shape to the contour of the upper side (52) of the sump (28), so as to make it possible to fit a sump (28) associated with the engine block (18).
- Power train (10) according to Claim 1, characterized in that each tetrahedral bracket (26) comprises, at the vertices (58, 60) of its base (56) which are furthest away from a mid-plane (P') of the engine (12), two longitudinal drilled holes (62, 64) for screw-fastening the bracket (26) to a complementary drilled surface of the transmission bell housing (22).
- Power train (10) according to either of Claims 1 and 3, characterized in that the body (72) of each bracket comprises a cavity (70) which opens into its base (56) in order to lighten and strengthen the bracket (26).
- Power train (10) according to any one of Claims 1 to 4, characterized in that the brackets (26) are produced as an integral unit with the spacer (42).
- Power train according to any one of Claims 1 to 5, characterized in that the spacer (42) is obtained by moulding, in particular by moulding an aluminium alloy.
- Power train (10) according to any one of Claims 1 to 6, characterized in that the parallelepipedal spacer (42) comprises openings (54) which open out between its upper (46) and lower (50) sides so as to allow the passage of elements of moving parts of the engine (12).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9909438 | 1999-07-21 | ||
FR9909438A FR2796702B1 (en) | 1999-07-21 | 1999-07-21 | MOTOR-PROPELLER GROUP INCLUDING AN OIL PAN |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1070834A1 EP1070834A1 (en) | 2001-01-24 |
EP1070834B1 true EP1070834B1 (en) | 2005-03-30 |
Family
ID=9548334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00401948A Expired - Lifetime EP1070834B1 (en) | 1999-07-21 | 2000-07-06 | Combustion engine with a spacer on the oil pan |
Country Status (5)
Country | Link |
---|---|
US (1) | US6374794B1 (en) |
EP (1) | EP1070834B1 (en) |
AT (1) | ATE292233T1 (en) |
DE (1) | DE60019033D1 (en) |
FR (1) | FR2796702B1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7387190B2 (en) * | 2003-12-17 | 2008-06-17 | General Motors Corporation | Oil pan assembly and method of selecting an oil pan |
US6928974B1 (en) * | 2004-01-30 | 2005-08-16 | Demetrios Markou | Reinforcement plate for a reciprocating engine |
DE202007008481U1 (en) | 2007-06-13 | 2008-10-23 | Mann+Hummel Gmbh | Oil pan for an internal combustion engine transmission unit |
US8011342B2 (en) * | 2008-07-16 | 2011-09-06 | Polaris Industries Inc. | Wet oil sump for four cycle engine |
US20100229821A1 (en) * | 2009-03-13 | 2010-09-16 | Filtrauto | Plastic Structural Oil Sump with Fitted-on Bottom for a Combustion Engine and Method of Fabricating such a Sump |
DE102013018449A1 (en) | 2013-11-05 | 2015-05-07 | Man Truck & Bus Ag | Oil sump and axle carrier with an inclined flange surface |
GB2548425B (en) * | 2016-02-15 | 2020-07-01 | A Clark Mathew | Two-part structural oil pan |
FR3113625A1 (en) | 2020-08-25 | 2022-03-04 | Psa Automobiles Sa | POWERTRAIN INCLUDING A MECHANICAL STIFFENING DEVICE |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2837063A (en) * | 1955-10-31 | 1958-06-03 | Martinez Rafael | Device for clamping a crank case oil pan to the base of a gasoline engine |
US3100028A (en) * | 1961-03-14 | 1963-08-06 | Ford Motor Co | Lubricant sump |
BE794095A (en) * | 1972-02-04 | 1973-05-16 | Berliet Automobiles | PERFECTION IN THE CRANKCASE OF VEHICLE INTERNAL COMBUSTION ENGINES |
US4245595A (en) * | 1977-09-13 | 1981-01-20 | Nissan Motor Company, Limited | Internal combustion engine for motor vehicles |
US4294333A (en) * | 1978-07-20 | 1981-10-13 | Little Barry S | Oil pan adaptor for internal combustion engines |
JPS593180Y2 (en) * | 1980-11-26 | 1984-01-28 | 日産自動車株式会社 | cylinder block of internal combustion engine |
JPH0219531Y2 (en) * | 1985-03-25 | 1990-05-30 | ||
JPH0413402Y2 (en) * | 1986-04-23 | 1992-03-27 | ||
US5016584A (en) * | 1988-10-11 | 1991-05-21 | Honda Giken Kogyo Kabushiki Kaisha | Engine block construction with skeletal frame |
JPH0343513U (en) * | 1989-09-07 | 1991-04-24 | ||
DE4334858C1 (en) * | 1993-10-13 | 1995-04-20 | Vaw Ver Aluminium Werke Ag | Oil pan (sump) and process for the production thereof |
DE19746032C2 (en) * | 1996-10-21 | 2001-02-01 | Nissan Motor | Oil pan assembly for internal combustion engine |
-
1999
- 1999-07-21 FR FR9909438A patent/FR2796702B1/en not_active Expired - Lifetime
-
2000
- 2000-07-06 AT AT00401948T patent/ATE292233T1/en not_active IP Right Cessation
- 2000-07-06 EP EP00401948A patent/EP1070834B1/en not_active Expired - Lifetime
- 2000-07-06 DE DE60019033T patent/DE60019033D1/en not_active Expired - Lifetime
- 2000-07-21 US US09/621,866 patent/US6374794B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE292233T1 (en) | 2005-04-15 |
DE60019033D1 (en) | 2005-05-04 |
FR2796702A1 (en) | 2001-01-26 |
FR2796702B1 (en) | 2001-09-07 |
US6374794B1 (en) | 2002-04-23 |
EP1070834A1 (en) | 2001-01-24 |
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