EP0089300A1 - Sound-dampened engine block - Google Patents

Sound-dampened engine block Download PDF

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Publication number
EP0089300A1
EP0089300A1 EP83420044A EP83420044A EP0089300A1 EP 0089300 A1 EP0089300 A1 EP 0089300A1 EP 83420044 A EP83420044 A EP 83420044A EP 83420044 A EP83420044 A EP 83420044A EP 0089300 A1 EP0089300 A1 EP 0089300A1
Authority
EP
European Patent Office
Prior art keywords
cylinder block
engine
block according
external part
parts
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.)
Withdrawn
Application number
EP83420044A
Other languages
German (de)
French (fr)
Inventor
Jean-Paul Reynaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault Trucks SAS
Original Assignee
Renault Vehicules Industriels SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault Vehicules Industriels SA filed Critical Renault Vehicules Industriels SA
Publication of EP0089300A1 publication Critical patent/EP0089300A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation

Definitions

  • the present invention applies to internal combustion thermal engines.
  • heat engines are made of materials the choice of which is dictated by considerations of mechanical resistance, heat resistance, resistance to chemical agents, specific mass or expansion, neglecting the ability to absorb vibrations.
  • materials having a good capacity to absorb vibrations generally do not have the usual properties of metals, in particular mechanical resistance and resistance to heat.
  • the present invention aims to avoid these drawbacks by providing a heat engine, which is both soundproof, easy to access, and of a price similar to that of a conventional engine.
  • a heat engine according to the invention comprises a cylinder block and it is characterized in that in this cylinder block are incorporated phonic screens associated with its different functions. This will eliminate problems of accessibility to organs, and the price of screens will no longer cost that of the engine.
  • the cylinder block will include an interior part which will perform the functions involving high stresses, such as maintaining the shaft line and the cylinder heads, fixing to the vehicle chassis, and an external part which , in addition to its role as a sound screen and damping vibrations of the interior, can provide part of the sealing functions for different fluids as well as functions involving moderate stresses: water, oil pipes , support for the aforementioned organs.
  • the interior part will be made with a classic material such as cast iron, steel or aluminum; it will have forms capable of ensuring effective anchoring and sealing at the level of the connection with the external part.
  • the Single Figure is a schematic view showing in cross section, a soundproof engine block according to the invention.
  • FIG. 1 There is shown in the single figure, a partial cross section of an internal combustion engine, of the type comprising several cylinders in line. The cut is made in the diametral plane of one of the cylinders, it being understood that the mobile coupling has not been shown (crankshaft, connecting rods, pistons, liner).
  • the cylinder block 3 defining a shaft line 1 is surmounted by a cylinder head 4, on the side of which an exhaust manifold 10 supports a turbo-supercharger 6 which feeds an intake duct 5.
  • the part bottom of the cylinder block 3 is closed by a casing 2.
  • the external part 8 and the internal part 7 are united definitively and cannot be dismantled, for example by overmolding, by thermo-injection, by ultrasonic welding, by gluing, by screwing, or by any other known method,
  • the external part 8 constitutes a screen enveloping all or part of the internal part 7. It may itself be possibly double-walled, as indicated in the drawings, at the level of the reference 9.
  • the outer part 8 can also extend to other parts of the engine, such as for example the exhaust manifold 10.
  • the latter is then also produced in two parts, namely an inner part 7 in a metal of the usual type, and an external part 8, playing the role of sound and heat shield.
  • the external part 8 of the block could possibly allow the fixing of other screens, soundproofing other noisy parts, or likely to transmit noise, in particular: alternator, hydraulic pump, compressor, cylinder head, rocker covers, pipes and manifolds d intake air, exhaust manifolds and manifolds, turbo-compressor, injection pump, or others.

Abstract

The invention relates to a thermal engine, more particularly its cylinder block (3). The cylinder block (3) is formed by an inner part (7) made of metal and an outer part (8) made of a material with a high damping coefficient or a composite material with viscoelastic properties or an assembly of thermal and acoustic insulation materials. The invention is used for the soundproofing of a piston engine.

Description

La présente invention s'applique aux moteurs thermiques à combustion interne.The present invention applies to internal combustion thermal engines.

Actuellement, les moteurs thermiques sont réalisés avec des matériaux dont le choix est dicté par des considérations de résistance mécanique, de résistance à la chaleur, de résistance aux agents chimiques, de masse spécifique ou de dilatation, en négligeant la capacité à amortir les vibrations.Currently, heat engines are made of materials the choice of which is dictated by considerations of mechanical resistance, heat resistance, resistance to chemical agents, specific mass or expansion, neglecting the ability to absorb vibrations.

Or, les matériaux ayant une bonne capacité à amortir les vibrations n'ont généralement pas les propriétés habituelles des métaux, en en particulier la résistance mécanique et la résistance à la chaleur.However, materials having a good capacity to absorb vibrations generally do not have the usual properties of metals, in particular mechanical resistance and resistance to heat.

Aussi, pour insonoriser un moteur, on a recours habituellement à une isolation phonique extérieure : on utilise des écrans avec ou sans matériaux absorbants pour réduire la transmission des bruits par rayonnements.Also, to soundproof an engine, we usually use external sound insulation: we use screens with or without absorbent materials to reduce the transmission of noise by radiation.

Mais ces écrans ont l'inconvénient de compromettre l'accessibilité aux différents organes tels que démarreur, filtres divers, alternateur, pompe d'injection, pompe hydraulique, compresseur, et leur prix s'ajoute à celui du moteur.However, these screens have the disadvantage of compromising accessibility to the various organs such as starter, various filters, alternator, injection pump, hydraulic pump, compressor, and their price is added to that of the engine.

La présente invention a pour but d'éviter ces inconvénients en réalisant un moteur thermique, qui soit à la fois insonorisé, facile d'accès, et d'un prix analogue à celui d'un moteur classique.The present invention aims to avoid these drawbacks by providing a heat engine, which is both soundproof, easy to access, and of a price similar to that of a conventional engine.

Un moteur thermique selon l'invention comporte un bloc-cylindres et il est caractérisé en ce qu'à ce bloc-cylindres, sont incorporés des écrans phoniques associés à ses différentes fonctions. On éliminera ainsi les problèmes d'accessibilité aux organes, et le prix des écrans ne grèvera plus celui du moteur.A heat engine according to the invention comprises a cylinder block and it is characterized in that in this cylinder block are incorporated phonic screens associated with its different functions. This will eliminate problems of accessibility to organs, and the price of screens will no longer cost that of the engine.

Compte tenu des problèmes de résistance mécanique, le bloc-cylindres comprendra une partie intérieure qui assurera les fonctions impliquant de fortes sollicitations, comme le maintien de la ligne d'arbre et des culasses, la fixation au châssis du véhicule, et une partie extérieure qui, en plus de son rôle d'écran phonique et d'amortissant des vibrations de la partie intérieure, pourra assurer une partie des fonctions d'étanchéité aux différents fluides ainsi que des fontions impliquant des sollicitations modérées : canalisations d'eau, d'huile, support des organes précédemment cités.In view of the mechanical resistance problems, the cylinder block will include an interior part which will perform the functions involving high stresses, such as maintaining the shaft line and the cylinder heads, fixing to the vehicle chassis, and an external part which , in addition to its role as a sound screen and damping vibrations of the interior, can provide part of the sealing functions for different fluids as well as functions involving moderate stresses: water, oil pipes , support for the aforementioned organs.

La partie intérieure sera réalisée avec un matériau classique comme la fonte, l'acier ou l'aluminium ; elle aura des formes propres à assurer un ancrage et une étanchéité efficaces au niveau de la liaison avec la partie extérieure.The interior part will be made with a classic material such as cast iron, steel or aluminum; it will have forms capable of ensuring effective anchoring and sealing at the level of the connection with the external part.

La partie extérieure sera réalisée avec un ou plusieurs matériaux à fort coefficient d'amortissement interne et à faible transmissibilité acoustique, et réunie à la partie intérieure par surmoulage, soudage par ultra-sons, collage, vissage, ou tout procédé utilisable avec lesdits matériaux, d'où un ensemble monoblocp permettant ;

  • - d'assurer des étanchéités fiables;
  • - des qualités d'insonorisation fidèles.
The external part will be made with one or more materials with a high internal damping coefficient and low acoustic transmissibility, and joined to the internal part by overmolding, ultrasonic welding, gluing, screwing, or any process usable with said materials, hence a monoblocp assembly allowing;
  • - ensure reliable seals;
  • - faithful soundproofing qualities.

Le dessin annexé, donné à titre d'exemple non limitatif, permettra de mieux comprendre les caractéristiques de lrinvention.The accompanying drawing, given by way of example, will better understand the characteristics of the invention r.

La Figure Unique est une vue schématique montrant en coupe transversale, un bloc-moteur insonorisé selon l'invention.The Single Figure is a schematic view showing in cross section, a soundproof engine block according to the invention.

On a représenté sur la figure unique, une coupe transversale partielle d'un moteur à combustion interne, du type comportant plusieurs cylindres en ligne. La coupe est pratiquée dans le plan diamétral de l'un des cylindres, étant entendu qu'on n'a pas représenté l'attelage mobile (vilebrequin, bielles, pistons, chemise). Le bloc-cylindres 3 définissant une ligne d'arbre 1, est surmonté par une culasse 4, sur le c8té de laquelle un collecteur d'échappement 10 supporte un turbo-compresseur de suralimentation 6 qui alimente un conduit d'admission 5. La partie inférieure du bloc-cylindres 3 est fermée par un carter 2.There is shown in the single figure, a partial cross section of an internal combustion engine, of the type comprising several cylinders in line. The cut is made in the diametral plane of one of the cylinders, it being understood that the mobile coupling has not been shown (crankshaft, connecting rods, pistons, liner). The cylinder block 3 defining a shaft line 1, is surmounted by a cylinder head 4, on the side of which an exhaust manifold 10 supports a turbo-supercharger 6 which feeds an intake duct 5. The part bottom of the cylinder block 3 is closed by a casing 2.

La caractéristique du bloc-moteur 3 et des accessoires selon l'invention, est de comprendre deux parties rigidement intégrées l'une à l'autre, à savoir :

  • - une partie intérieure 7 réalisée en un matériau classique comme la fonte, l'acier; ou l'aluminium, qui assurera, pendant le fonctionnement du moteur, les fonctions impliquant de fortes sollicitations mécaniques;
  • - une partie extérieure telle que 8, réalisée en un ou plusieurs matériaux à fort coefficient d'amortissement interne, et à faible transmissibilité acoustique.
The characteristic of the engine block 3 and of the accessories according to the invention is that it comprises two parts rigidly integrated with each other, namely:
  • - an inner part 7 made of a conventional material such as cast iron, steel; or aluminum, which will perform the functions involving high mechanical stresses during engine operation;
  • - An outer part such as 8, made of one or more materials with a high internal damping coefficient, and low acoustic transmissibility.

La partie extérieure 8 peut être elle-même réalisée en un matériau composite associant d'une façon homogène ou sous forme de couches :

  • - un matériau visco-élastique tel que par exemple un thermo-plastique ou un élastomère;
  • - à un matériau thermodurcissable ou thermoplastique (par exemple polyester ou époxy, chargés ou non et pouvant être renforcé par des fibres par exemple de verre ou de carbone), à un métal, ou à deux métaux, pouvant être différents, et aussi à des fibres, par exemple d'aluminium, de silice ou de verre..
The outer part 8 can itself be made of a composite material combining in a homogeneous manner or in the form of layers:
  • - a visco-elastic material such as for example a thermoplastic or an elastomer;
  • - to a thermosetting or thermoplastic material (for example polyester or epoxy, loaded or not and which can be reinforced by fibers, for example glass or carbon), to one metal, or to two metals, which may be different, and also to fibers, for example aluminum, silica or glass.

La partie extérieure 8 et la partis intérieure 7 sont réunies de façon définitive et indémontable, par exemple par surmoulage, par thermo-injection, par soudage aux ultra-sons, par collage, par vissage, ou par tout autre procédé connu,The external part 8 and the internal part 7 are united definitively and cannot be dismantled, for example by overmolding, by thermo-injection, by ultrasonic welding, by gluing, by screwing, or by any other known method,

La partie extérieure 8 constitue un écran enveloppant tout ou partie de la partie intérieure 7. Elle peut elle-même être éventuellement à double paroi, comme indiqué sur les dessins, au niveau de la référence 9.The external part 8 constitutes a screen enveloping all or part of the internal part 7. It may itself be possibly double-walled, as indicated in the drawings, at the level of the reference 9.

Bien mieux, la partie extérieure 8 peut s'étendre également à d'autres pièces du moteur, telles que par exemple le collecteur d'échappement 10. Ce dernier est alors réalisé lui aussi, en deux parties, à savoir une partie intérieure 7 en un métal de type usuel, et une partie extérieure 8, jouant le rôle d'écran phonique et thermique.Much better, the outer part 8 can also extend to other parts of the engine, such as for example the exhaust manifold 10. The latter is then also produced in two parts, namely an inner part 7 in a metal of the usual type, and an external part 8, playing the role of sound and heat shield.

La partie extérieure 8 du bloc pourra permettre éventuellement la fixation d'autres écrans, isolant phoniquement d'autres pièces bruyantes, ou susceptibles de transmettre du bruit,notamment : alternateur, pompe hydraulique, compresseur, culasse, cache-culbuteurs, tubulures et collecteurs d'air d'admission, tubulures et collecteurs des gaz d'échappement, turbo-compresseur, pompe à injection, ou autres.The external part 8 of the block could possibly allow the fixing of other screens, soundproofing other noisy parts, or likely to transmit noise, in particular: alternator, hydraulic pump, compressor, cylinder head, rocker covers, pipes and manifolds d intake air, exhaust manifolds and manifolds, turbo-compressor, injection pump, or others.

Claims (6)

1 - Bloc-cylindres poux un moteur à combustion interne, caractérisé en ce qu'il est réalisé en deux parties rigidement liées l'une à l'autre , à savoir : - une partie intérieure (7) réalisée en un premier matériau pour assurer la résiatance mécanique des parties les plus sollicitées du moteur - une partie extérieur (8) réalisée en un matériau ou un ensemble de matériaux à fort coefficient d'amortissement, pour assurer l'amortissement vibratoire, l'isolation phonique et,/ou thermique, les fonctions d'étanchéité et la résistance mécanique des parties les moins sollicitées du moteur, 1 - Cylinder block for an internal combustion engine, characterized in that it is produced in two parts rigidly linked to each other, namely: - an inner part (7) made of a first material to ensure the mechanical resistance of the most stressed parts of the engine - an external part (8) made of a material or a set of materials with a high damping coefficient, to ensure vibration damping, sound and / or thermal insulation, the sealing functions and the mechanical resistance of the least stressed parts of the engine, 2 - Bloc-cylindres suivant la revendication 1, caractérisé en ce que la partie intérieure (7) est en un matériau métallique du groupe qui comprend la fonte, l'acier, l'aluminium, et leurs alliages.2 - cylinder block according to claim 1, characterized in that the inner part (7) is a metallic material of the group which comprises cast iron, steel, aluminum, and their alloys. 3- Bloc-cylindres suivant la revendication 1, caractérisé en ce que la partie extérieure (8) est réalisée en un matériau visco-élastique, tel qu'un thermo-plastique ou un - l'astomère.3- cylinder block according to claim 1, characterized in that the outer part (8) is made of a visco-elastic material, such as a thermoplastic or an - astomer. 4 - Bloc-cylindres suivant la revendication 3, caractérisé en ce que le matériau de la partie extérieure (8) est un matériau composite ou une matière visco-élastique associée à un matériau tel que : thermo-durcissable, thermoplastique avec ou sans charges, renforcé ou non de fibres, un ou plusieurs métaux, des fibres de carbone, de verre d'alumine ou de silice.4 - cylinder block according to claim 3, characterized in that the material of the external part (8) is a composite material or a visco-elastic material associated with a material such as: thermosetting, thermoplastic with or without fillers, reinforced or not with fibers, one or more metals, carbon fibers, alumina glass or silica. 5 - Bloc-cylindres suivant l'une quelconque des revendications précédentes, caractérisé en ce que la partie exté- 'ieure(8) et la partie intérieure (7) coopèrent pour définir un collecteur d'échappeement (10).5 - Cylinder block according to any one of the preceding claims, characterized in that the external part (8) and the internal part (7) cooperate to define an exhaust manifold (10). 6 - Bloc-cylindres suivant l'une quelconque des revendications précédentes, caractérisé en ce que la partie exté ieure (8) est utilisée pour la fixation d'écrans isolants pour d'autres parties du moteur et d'organes voisins.6 - Cylinder block according to any one of the preceding claims, characterized in that the external part (8) is used for fixing insulating screens for other parts of the engine and neighboring members.
EP83420044A 1982-03-16 1983-03-14 Sound-dampened engine block Withdrawn EP0089300A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8204790A FR2523645B1 (en) 1982-03-16 1982-03-16 SOUNDPROOF MOTOR BLOCK
FR8204790 1982-03-16

Publications (1)

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EP0089300A1 true EP0089300A1 (en) 1983-09-21

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EP83420044A Withdrawn EP0089300A1 (en) 1982-03-16 1983-03-14 Sound-dampened engine block

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EP (1) EP0089300A1 (en)
ES (1) ES520679A0 (en)
FR (1) FR2523645B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573814A1 (en) * 1984-11-29 1986-05-30 Fischer Ag Georg CYLINDER BLOCK MADE IN SEVERAL ELEMENTS
US8233189B2 (en) 2001-08-16 2012-07-31 Sun Chemical Corporation System and method for disseminating color ink and colorant formulas

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097774A5 (en) * 1970-05-09 1972-03-03 Teroson Gmbh
FR2294327A1 (en) * 1974-12-11 1976-07-09 Hatz Motoren INTERNAL COMBUSTION ENGINE WITH SOUNDPROOFING ENCLOSURE
FR2456844A1 (en) * 1979-05-16 1980-12-12 List Hans SILENT INTERNAL COMBUSTION ENGINE
FR2474588A1 (en) * 1980-01-24 1981-07-31 Zschopau Motorrad Veb Air cooled IC engine - has sound absorbing cover clamped tight to cooling ribs to dampen vibration

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097774A5 (en) * 1970-05-09 1972-03-03 Teroson Gmbh
FR2294327A1 (en) * 1974-12-11 1976-07-09 Hatz Motoren INTERNAL COMBUSTION ENGINE WITH SOUNDPROOFING ENCLOSURE
FR2456844A1 (en) * 1979-05-16 1980-12-12 List Hans SILENT INTERNAL COMBUSTION ENGINE
FR2474588A1 (en) * 1980-01-24 1981-07-31 Zschopau Motorrad Veb Air cooled IC engine - has sound absorbing cover clamped tight to cooling ribs to dampen vibration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573814A1 (en) * 1984-11-29 1986-05-30 Fischer Ag Georg CYLINDER BLOCK MADE IN SEVERAL ELEMENTS
GB2168109A (en) * 1984-11-29 1986-06-11 Fischer Ag Georg I.C. engine cylinder block and crankcase
US8233189B2 (en) 2001-08-16 2012-07-31 Sun Chemical Corporation System and method for disseminating color ink and colorant formulas

Also Published As

Publication number Publication date
ES8503214A1 (en) 1985-03-01
ES520679A0 (en) 1985-03-01
FR2523645B1 (en) 1986-11-07
FR2523645A1 (en) 1983-09-23

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Inventor name: REYNAUD, JEAN-PAUL