EP1956223B1 - Vibration-absorbing internal combustion engine block - Google Patents

Vibration-absorbing internal combustion engine block Download PDF

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Publication number
EP1956223B1
EP1956223B1 EP08150396A EP08150396A EP1956223B1 EP 1956223 B1 EP1956223 B1 EP 1956223B1 EP 08150396 A EP08150396 A EP 08150396A EP 08150396 A EP08150396 A EP 08150396A EP 1956223 B1 EP1956223 B1 EP 1956223B1
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EP
European Patent Office
Prior art keywords
sheets
engine block
sheet
plate
block assembly
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Active
Application number
EP08150396A
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German (de)
French (fr)
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EP1956223A1 (en
Inventor
Jean-Marc Eickhoff
Léon Gavric
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PSA Automobiles SA
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Peugeot Citroen Automobiles SA
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Publication of EP1956223A1 publication Critical patent/EP1956223A1/en
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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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/008—Sound insulation
    • 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
    • F01M2011/0008—Oilsumps with means for reducing vibrations

Definitions

  • our invention aims to provide a solution to dampen this type of vibration, while damping vibration from shocks between the lower part of the cylinder block and the upper part of the oil sump.
  • the plate comprises mass / spring systems fixed on the tie rods.
  • the central core is made of elastomer.

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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)
  • Vibration Prevention Devices (AREA)

Abstract

The assembly has a cylinder case placed above an oil sump, and a sandwich plate (1) interposed between the case and the sump. The plate is fixed, in its periphery, to the case and the sump. The plate is constituted of a central core (1c) placed between a lower sheet (1a) and an upper sheet (1b). The stiffness of the core is 50 times lower than respective stiffness of the sheets. Each sheet comprises a slit permitting a clearance along an axis parallel to width of the plate. The sheets are made of aluminum or steel. The core is made of elastomer.

Description

L'invention a pour objet un ensemble d'un bloc de moteur à combustion interne comprenant un carter cylindre disposé au dessus d'un carter d'huile et une plaque interposée entre le carter cylindre et le carter d'huile.The invention relates to an assembly of an internal combustion engine block comprising a cylinder block disposed above an oil sump and a plate interposed between the cylinder block and the oil sump.

La réduction du bruit des moteurs restant une problématique constante, il demeure nécessaire de contrer les vibrations qui sont généralement source de bruit. Il est ainsi connu que, sur certaines architectures du groupe motopropulseur notamment celles comprenant un carter cylindre à jupes, les parois verticales du carter cylindre vibrent en s'éloignant et en se rapprochant l'une de l'autre sous l'excitation de l'attelage mobile constitué par l'ensemble pistons, bielles et vilebrequin. Les vibrations des parois verticales du carter cylindre provoquent alors un rayonnement acoustique gênant, qui se propage à d'autres tôles du groupe motopropulseur, notamment au carter d'huile.The reduction of engine noise remains a constant problem, it remains necessary to counter the vibrations that are generally noise. It is thus known that, on certain powertrain architectures, in particular those comprising a skirted cylinder cover, the vertical walls of the cylinder block vibrate as they move away and come closer to one another under the excitation of the engine. movable hitch constituted by the assembly pistons, connecting rods and crankshaft. The vibrations of the vertical walls of the cylinder block then cause an annoying acoustic radiation, which propagates to other sheets of the powertrain, including the oil sump.

Afin de contrer la problématique des vibrations, plusieurs solutions ont déjà été envisagées. Par exemple, la demande JP07317600 proposent d'intercaler entre le carter cylindre et le carter d'huile une tôle destinée à amortir les vibrations. Toutefois, il s'agit principalement d'amortir les vibrations issues des chocs entre la partie basse du carter cylindre et la partie haute du carter d'huile et de filtrer la transmission des vibrations du carter cylindre au carter d'huile.To counter the problem of vibrations, several solutions have already been considered. For example, the demand JP07317600 propose to insert between the cylinder block and the oil sump a sheet for damping vibrations. However, it is mainly to dampen the vibrations resulting from shocks between the lower part of the cylinder block and the upper part of the oil sump and to filter the transmission of vibrations from the cylinder block to the sump.

Toutefois, la solution proposée dans la demande JP07317600 ne permet pas d'amortir les vibrations des parois verticales du carter cylindre qui s'éloignent et se rapprochent l'une de l'autre sous l'excitation de l'attelage mobile.However, the solution proposed in the application JP07317600 does not allow to damp the vibrations of the walls vertical cylinders that move away and come closer to each other under the excitement of the moving hitch.

C'est pourquoi, notre invention a pour but de proposer une solution pour amortir ce type de vibrations, tout en amortissant les vibrations issues des chocs entre la partie basse du carter cylindre et la partie haute du carter d'huile.Therefore, our invention aims to provide a solution to dampen this type of vibration, while damping vibration from shocks between the lower part of the cylinder block and the upper part of the oil sump.

Plus précisément, l'invention a pour objet un ensemble d'un bloc de moteur à combustion interne comprenant un carter cylindre disposé au dessus d'un carter d'huile et une plaque interposée entre ledit carter cylindre et ledit carter d'huile et fixée en sa périphérie au carter cylindre et au carter d'huile, caractérisé en ce que la plaque est un sandwich constitué d'une âme centrale disposée entre une tôle inférieure et une tôle supérieure, la raideur de l'âme centrale étant au moins 50 fois inférieure aux raideurs des tôles et les tôles comportant chacune une zone permettant un débattement suivant un axe parallèle à la largeur de la plaque.More specifically, the subject of the invention is an assembly of an internal combustion engine block comprising a cylinder block disposed above an oil sump and a plate interposed between said cylinder block and said oil sump and fixed at its periphery to the cylinder block and the oil sump, characterized in that the plate is a sandwich consisting of a central core disposed between a lower plate and an upper plate, the stiffness of the central core being at least 50 times less than the stiffness of the sheets and the plates each having a zone allowing a movement along an axis parallel to the width of the plate.

Selon certaines caractéristiques, la zone permettant un débattement comprend une fente découpée suivant l'axe longitudinal des tôles.According to certain features, the zone allowing a deflection comprises a slot cut along the longitudinal axis of the sheets.

Selon d'autres caractéristiques, la zone permettant un débattement comprend un galbe longitudinal réalisé de manière identique dans chacune des tôles.According to other characteristics, the zone allowing a deflection comprises a longitudinal curve made identically in each of the sheets.

Selon d'autres caractéristiques, la plaque comporte des ouvertures délimitant des tirants.According to other features, the plate has openings defining tie rods.

Selon d'autres caractéristiques, la plaque comporte des systèmes masse/ressort fixés sur les tirants.According to other characteristics, the plate comprises mass / spring systems fixed on the tie rods.

Selon d'autres caractéristiques, l'âme centrale est en élastomère.According to other characteristics, the central core is made of elastomer.

Selon d'autres caractéristiques, les tôles sont en aluminium.According to other characteristics, the sheets are made of aluminum.

Selon d'autres caractéristiques, les tôles sont en acier.According to other characteristics, the sheets are made of steel.

D'autres particularités et avantages apparaîtront à la lecture de la description ci-après effectuée, à titre indicatif et nullement limitatif, en référence aux figures dans lesquelles :

  • La figure 1 représente une vue d'ensemble de la plaque montée dans le bloc moteur,
  • La figure 2 est une vue en coupe de la tôle sandwich,
  • Les figures 3 est une vue de dessus d'un élément constituant la tôle inférieure de la plaque selon un premier mode de réalisation,
  • La figure 4 est une vue de dessus d'un élément constituant la tôle supérieure de la plaque selon le premier mode de réalisation,
  • La figure 5 est une vue de dessus de la plaque selon un second mode de réalisation,
  • La figure 6 est une vue de dessus de la plaque selon un perfectionnement du second mode de réalisation.
Other particularities and advantages will become apparent on reading the following description, given as an indication and in no way limiting, with reference to the figures in which:
  • The figure 1 represents an overview of the plate mounted in the engine block,
  • The figure 2 is a sectional view of the sandwich sheet,
  • The figures 3 is a top view of an element constituting the lower plate of the plate according to a first embodiment,
  • The figure 4 is a top view of an element constituting the upper plate of the plate according to the first embodiment,
  • The figure 5 is a top view of the plate according to a second embodiment,
  • The figure 6 is a top view of the plate according to an improvement of the second embodiment.

La figure 1 représente une plaque 1 conforme à notre invention et destinée à être insérée entre le carter cylindre 2 et le carter d'huile 3. Tel que représenté sur la figure 3, la tôle 1 comporte des passages 8 aptes à accueillir les fixations permettant d'assembler conjointement le carter cylindre 2, le carter d'huile 3 et la plaque 1. Les mêmes numérotations ont été utilisées pour des parties qui se retrouvent inchangées pour les différentes variantes de réalisation de l'invention.The figure 1 represents a plate 1 according to our invention and intended to be inserted between the cylinder block 2 and the oil sump 3. As shown in FIG. figure 3 , the sheet 1 comprises passages 8 adapted to accommodate the fasteners for assembling together the cylinder block 2, the oil sump 3 and the plate 1. The same numbering was used for parts which are found unchanged for the different embodiments of the invention.

Tel que représenté sur la figure 2, la plaque 1 est découpée dans un matériau sandwich composé de deux tôles 1a et 1b enserrant une âme centrale 1c. La tôle 1a est dite inférieure en ce sens qu'elle est en contact avec le carter d'huile 3 et la tôle 1 b est dite supérieure en ce sens qu'elle est en contact avec le carter cylindre 2. Afin de permettre la rotation de l'ensemble bielles / vilebrequin, des ouvertures 6 ont été réalisées dans la plaque 1 délimitant ainsi des tirants 5. Avantageusement, les tôles 1a, 1 b sont en matériau métallique de manière à ce que les tôles 1a, 1b admettent respectivement une raideur Ka, Kb au moins égal sinon supérieure à la raideur du carter cylindre 2, de manière à limiter la déformée des modes vibratoires du carter cylindre 2. Ainsi, il est avantageux d'utiliser des tôles 1a et 1b en acier ou en aluminium.As shown on the figure 2 , the plate 1 is cut in a sandwich material consisting of two sheets 1a and 1b enclosing a central core 1c. The sheet 1a is said to be lower in that it is in contact with the oil sump 3 and the sheet 1b is said to be upper in that it is in contact with the cylinder block 2. In order to allow rotation of the connecting rod / crankshaft assembly, openings 6 have been made in the plate 1 thus defining tie rods 5. Advantageously, the sheets 1a, 1b are made of metallic material so that the sheets 1a, 1b respectively admit a stiffness Ka, Kb at least equal to or greater than the stiffness of the cylinder block 2, so as to limit the deformation of the vibratory modes of the cylinder block 2. Thus, it is advantageous to use sheets 1a and 1b steel or aluminum.

Pour que l'âme centrale 1c soit apte à travailler en cisaillement avec les tôles 1a, 1b, il est aussi nécessaire d'employer un matériau qui admettre une raideur Kc au moins 50 fois inférieure aux raideurs respectives Ka, Kb des tôles 1a, 1b. Pour ce faire, il avantageux d'utiliser des matériaux du type viscoélastique connu également pour leurs bons coefficients d'amortissement. On peut par exemple utiliser un élastomère.So that the central core 1c is able to work in shear with the sheets 1a, 1b, it is also necessary to use a material which admit a stiffness Kc at least 50 times lower than the respective stiffness Ka, Kb of the sheets 1a, 1b . To do this, it is advantageous to use materials of the viscoelastic type known also for their good damping coefficients. For example, an elastomer can be used.

Conformément à un premier mode de réalisation décrit sur les figures 3 et 4, les tôles inférieure 1a et supérieure 1b comportent chacune une fente 4 de telle sorte que lesdites fentes soient disposées de part et d'autre des tirants 5.According to a first embodiment described on the Figures 3 and 4 , the lower plates 1a and 1b upper each comprise a slot 4 so that said slots are arranged on either side of the tie rods 5.

Ainsi, lorsque sous l'excitation de l'attelage mobile constitué par l'ensemble pistons, bielles et vilebrequin, les parois verticales du carter cylindre vibrent en s'éloignant et en se rapprochant l'une de l'autre, la plaque 1 est soumise à des contraintes σ de traction / compression. Les fentes 4 des tôles 1a et 1b constituent chacune un jeu qui permet de diminuer la raideur desdites tôles. Ainsi, la plaque 1 peut s'étirer et de se comprimer sous l'effet des contraintes σ. De ce fait, l'âme 1c travaille en cisaillement par rapport aux tôles 1a et 1b et amortit ainsi certains modes vibratoires. L'épaisseur des tôles 1a, 1b, et de l'âme 1c est un paramètre important puisqu'il conditionne la raideur des tôles 1a, 1b et la souplesse de l'âme 1c. En définitive, l'épaisseur des tôles 1a, 1b et de l'âme 1c est définie en fonction des modes vibratoires qu'il faut amortir.Thus, when under the excitation of the movable hitch constituted by the assembly of pistons, connecting rods and crankshaft, the walls Vertical casing cylinder vibrate moving away and approaching each other, the plate 1 is subjected to stresses σ traction / compression. The slots 4 of the plates 1a and 1b each constitute a game that reduces the stiffness of said sheets. Thus, the plate 1 can stretch and compress under the effect of the constraints σ. As a result, the core 1c works in shear with respect to the sheets 1a and 1b and thus damps certain vibratory modes. The thickness of the sheets 1a, 1b, and the core 1c is an important parameter since it conditions the stiffness of the sheets 1a, 1b and the flexibility of the core 1c. Finally, the thickness of the sheets 1a, 1b and the core 1c is defined as a function of vibration modes that must be damped.

A titre d'exemple, en utilisant indifféremment de l'acier ou de l'aluminium pour réaliser les tôles inférieure 1a et supérieure 1b avec une épaisseur de l'ordre de 0.5 mm et en interposant une âme en élastomère d'épaisseur de l'ordre de 0.2 mm, on obtient un gain acoustique de l'ordre de 60 %. De manière plus générale, l'épaisseur des tôles 1a et 1b est comprise entre 0.4 et 1 mm et l'épaisseur de l'âme 1c est comprise entre 0.2 et 0.6 mm.By way of example, using either steel or aluminum indifferently to make the lower 1a and upper 1b sheets with a thickness of the order of 0.5 mm and by interposing a thick elastomer core of the order of 0.2 mm, an acoustic gain of the order of 60% is obtained. More generally, the thickness of the sheets 1a and 1b is between 0.4 and 1 mm and the thickness of the core 1c is between 0.2 and 0.6 mm.

Selon un second mode de réalisation décrit sur la figure 5, la plaque 1 ne comporte pas de fente 4 mais admet une forme galbée.According to a second embodiment described on the figure 5 , the plate 1 has no slot 4 but has a curved shape.

Ainsi, lorsque sous l'excitation de l'attelage mobile constitué par l'ensemble pistons, bielles et vilebrequin, les parois verticales du carter cylindre vibrent en s'éloignant et en se rapprochant l'une de l'autre, les tôles galbées 1a et 1b travaillent en traction / compression. En effet, la plaque 1 étant fixée solidairement aux carters 2 et 3, le débattement est rendu possible grâce à la zone 4 galbée. De par son élasticité, l'âme 1c travaille en cisaillement par rapport aux tôles 1a et 1b et amortit ainsi certains modes vibratoires. L'épaisseur des tôles 1a, 1b, et de l'âme 1c est un paramètre important puisqu'il conditionne la raideur des tôles 1a, 1b et l'élasticité de l'âme 1c. En définitive, l'épaisseur des tôles 1a, 1b et de l'âme 1c est définie en fonction des modes vibratoires qu'il faut amortir.Thus, when under the excitation of the movable coupling formed by the assembly of pistons, connecting rods and crankshaft, the vertical walls of the cylinder housing vibrate away from and towards each other, the curved plates 1a and 1b work in traction / compression. Indeed, the plate 1 being fixed integrally to the casings 2 and 3, the deflection is made possible thanks to the curved zone 4. Due to its elasticity, the core 1c works in shear with respect to the sheets 1a and 1b and thus damps certain vibratory modes. The thickness of the sheets 1a, 1b, and the core 1c is an important parameter since it conditions the stiffness of the sheets 1a, 1b and the elasticity of the core 1c. Finally, the thickness of the sheets 1a, 1b and the core 1c is defined as a function of vibration modes that must be damped.

La figure 6 décrit un perfectionnement du second mode de réalisation. Plus précisément, on a constaté que les tôles sandwich conformes au second mode de réalisation admettent généralement une raideur inférieure à la raideur des tôles conformes au premier mode de réalisation. Ainsi, même si l'âme 1c en matériau viscoélastique permet un bon amortissement des modes vibratoires en général, le contrôle de la déformée desdits modes, bien que déjà très correct, peut être amélioré. Il est alors possible d'optimiser le contrôle de la déformée des modes de vibration qu'il faut amortir en fixant des systèmes masse/ressort 7 sur les tirants 5. Ces systèmes masse/ressort 7 vont alors agir comme des batteurs, et atténuer les déformées des modes de vibration qu'il faut amortir.The figure 6 describes an improvement of the second embodiment. More specifically, it has been found that the sandwich plates according to the second embodiment generally admit a stiffness lower than the stiffness of the sheets according to the first embodiment. Thus, even if the core 1c of viscoelastic material allows a good damping of vibration modes in general, the control of the deformation of said modes, although already very correct, can be improved. It is then possible to optimize the control of the deformation of the vibration modes that must be damped by fixing mass / spring systems 7 on the tie rods 5. These mass / spring systems 7 will then act as drummers, and mitigate the distorted modes of vibration that must be amortized.

Claims (8)

  1. Internal combustion engine block assembly comprising a cylinder block (2) positioned above a sump (3) and gasket (1) interposed between the cylinder block (2) of the sump (3) and attached at its periphery to the cylinder block (2) and to the sump (3),
    characterized in that the gasket (1) is a sandwich consisting of a central core (1c) positioned between a lower sheet (1a) and an upper sheet (1b), the stiffness Kc of the central core (1c) being at least 50 times lower than the respective stiffness Ka, Kb of the sheets (la, 1b), and the sheets (la, 1b) each comprising a zone (4) that allows deflection along an axis parallel to the width of the gasket (1).
  2. Engine block assembly according to Claim 1,
    characterized in that the zone (4) comprises a slit cut along the longitudinal axis of the sheet (la; 1b).
  3. Engine block assembly according to either one of Claims 1 and 2, characterized in that the zone (4) has a curvature created along the longitudinal axis of the sheet (la; 1b), the curvature created in the sheet (1a) being identical to the curvature created in the sheet (1b).
  4. Engine block assembly according to any one of the preceding claims, characterized in that the gasket (1) has openings (6) delimiting ties (5).
  5. Engine block assembly according to Claim 3 or 4, characterized in that the gasket (1) comprises mass/spring systems (7) fixed the ties (5).
  6. Engine block assembly according to any one of the preceding claims, characterized in that the central core (1c) is made of elastomer.
  7. Engine block assembly according to any one of the preceding claims, characterized in that sheets (la, 1b) are made of aluminium.
  8. Engine block assembly according to any one of Claims 1 to 6, characterized in that the sheets (la, 1b) are made of steel.
EP08150396A 2007-01-25 2008-01-18 Vibration-absorbing internal combustion engine block Active EP1956223B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0752877A FR2911921B1 (en) 2007-01-25 2007-01-25 INTERNAL COMBUSTION ENGINE BLOCK DAMAGING VIBRATION.

Publications (2)

Publication Number Publication Date
EP1956223A1 EP1956223A1 (en) 2008-08-13
EP1956223B1 true EP1956223B1 (en) 2009-08-12

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EP08150396A Active EP1956223B1 (en) 2007-01-25 2008-01-18 Vibration-absorbing internal combustion engine block

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EP (1) EP1956223B1 (en)
AT (1) ATE439513T1 (en)
DE (1) DE602008000082D1 (en)
ES (1) ES2329200T3 (en)
FR (1) FR2911921B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102264513A (en) * 2008-12-23 2011-11-30 特雷勒堡鲁博尔公司 Method of forming cutting line partially through multilayer plate structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012513557A (en) * 2008-12-23 2012-06-14 トレレボルグ ルボレ エービー Damped items

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JPS5770937A (en) * 1980-10-22 1982-05-01 Mazda Motor Corp Oil pan for car engine
DE3418717A1 (en) * 1984-05-19 1985-11-21 Klöckner-Humboldt-Deutz AG, 5000 Köln Internal combustion engine with a lubricating-oil pan attached in vibration-isolating fashion to the crank case
KR100223084B1 (en) * 1993-09-14 1999-10-15 정몽규 The structure of cylinder block with ladder frame
KR100285438B1 (en) * 1993-11-01 2001-04-02 정몽규 Internal combustion engine
US5388556A (en) * 1994-04-08 1995-02-14 Caterpillar Inc. Internal combustion engine having flexible block and flexible oil pan
JPH07317600A (en) 1994-05-23 1995-12-05 Komatsu Ltd Noise reducing structure for oil pan
JP2001221025A (en) * 2000-02-09 2001-08-17 Toyota Motor Corp Oil pan of internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102264513A (en) * 2008-12-23 2011-11-30 特雷勒堡鲁博尔公司 Method of forming cutting line partially through multilayer plate structure
CN102264513B (en) * 2008-12-23 2014-07-23 特瑞堡密封设备卡尔马有限公司 Method of forming cutting line partially through multilayer plate structure

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Publication number Publication date
DE602008000082D1 (en) 2009-09-24
ES2329200T3 (en) 2009-11-23
EP1956223A1 (en) 2008-08-13
FR2911921A1 (en) 2008-08-01
FR2911921B1 (en) 2009-04-17
ATE439513T1 (en) 2009-08-15

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