FR2732738A1 - Elastic damper support for IC engines in vehicles - Google Patents
Elastic damper support for IC engines in vehicles Download PDFInfo
- Publication number
- FR2732738A1 FR2732738A1 FR9504179A FR9504179A FR2732738A1 FR 2732738 A1 FR2732738 A1 FR 2732738A1 FR 9504179 A FR9504179 A FR 9504179A FR 9504179 A FR9504179 A FR 9504179A FR 2732738 A1 FR2732738 A1 FR 2732738A1
- Authority
- FR
- France
- Prior art keywords
- block
- counterweight
- elastic
- elastic material
- engines
- 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.)
- Granted
Links
- 239000013013 elastic material Substances 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims abstract description 6
- 239000000806 elastomer Substances 0.000 claims abstract description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 3
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 3
- 229920001194 natural rubber Polymers 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010009 beating Methods 0.000 abstract 2
- 238000013016 damping Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000842 Zamak Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
- F16F7/108—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on plastics springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/371—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by inserts or auxiliary extension or exterior elements, e.g. for rigidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
- F16F1/3732—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape having an annular or the like shape, e.g. grommet-type resilient mountings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
DISPOSITIF DE SUPPORT ELASTIQUE A BATTEUR
La présente invention concerne un dispositif de support élastique à batteur pour le filtrage des vibrations d'un appareil vibrant du genre moteur à combustion interne, ce dispositif comportant un bloc de matière élastique élastomère ou caoutchouc naturel - inséré entre deux armatures propres à permettre la liaison du dispositif d'une part audit appareil vibrant, d'autre part à une base fixe.ELASTIC BEATER SUPPORT DEVICE
The present invention relates to an elastic support device with a beater for filtering the vibrations of a vibrating device of the internal combustion engine type, this device comprising a block of elastic elastomeric material or natural rubber - inserted between two frames suitable for allowing the connection of the device on the one hand to said vibrating device, on the other hand to a fixed base.
La raideur dynamique de tels supports augmente en principe avec la fréquence des vibrations auxquelles ils sont soumis, mais avec généralement un pic de résonance dans des fréquences acoustiques intermédiaires, qui peuvent se trouver être fréquemment rencontrées au cours du fonctionnement normal de l'appareil vibrant. Cela constitue un inconvénient gênant sur les véhicules automobiles, car alors la structure du véhicule est très mal isolée de la structure vibrante, c'est-à-dire du moteur, au point de vue vibratoire et sonore. The dynamic stiffness of such supports increases in principle with the frequency of the vibrations to which they are subjected, but with generally a resonance peak in intermediate acoustic frequencies, which may happen to be frequently encountered during the normal operation of the vibrating device. This constitutes an annoying drawback on motor vehicles, because then the structure of the vehicle is very poorly insulated from the vibrating structure, that is to say from the engine, from the vibratory and sound point of view.
Pour atténuer cette pointe des vibrations transmises à certaines fréquences, on a déjà imaginé l'utilisation de batteurs constitués de masses métalliques fixées sur l'armature mobile ; ces masses doivent donc être en général assez importantes, ce qui augmente le poids du véhicule ainsi que le prix du support au point de vue matière, à quoi s'ajoute l'augmentation du prix de la fabrication, due au montage desdites masses sur l'armature mobile. To attenuate this peak of the vibrations transmitted at certain frequencies, we have already imagined the use of beaters made up of metallic masses fixed on the mobile frame; these masses must therefore in general be fairly large, which increases the weight of the vehicle as well as the price of the support from a material point of view, to which is added the increase in the price of manufacture, due to the mounting of said masses on the mobile frame.
Le but de la présente invention est de remédier à ces divers inconvénients, et à cet effet, un dispositif de support élastique du type défini plus haut est caractérisé en ce que ledit batteur est constitué d'une masselotte reliée latéralement et élastiquement audit bloc de matière élastique. The object of the present invention is to remedy these various drawbacks, and for this purpose, an elastic support device of the type defined above is characterized in that said beater consists of a counterweight connected laterally and elastically to said block of material. elastic.
Avec une telle disposition, on s'est aperçu que, d'une façon surprenante, il suffisait généralement d'une masselotte d'un très faible poids pour diminuer considérablement le pic de raideur dynamique du dispositif, observé habituellement. L'expérience a montré que quelques essais permettaient de déterminer tres rapidement la masse idéale de ces masselottes, qui s'avère extrêmement petite par rapport à celle des batteurs ordinairement mis en oeuvre dans la technique antérieure, puisque réduite à seulement quelques grammes, au lieu de dizaines ou de centaines de grammes. With such an arrangement, it has been found that, surprisingly, it is generally sufficient to have a flyweight of very low weight to considerably reduce the dynamic stiffness peak of the device, usually observed. Experience has shown that a few tests make it possible to very quickly determine the ideal mass of these weights, which proves to be extremely small compared to that of the beaters ordinarily used in the prior art, since it is reduced to only a few grams, instead tens or hundreds of grams.
La fabrication d'un support élastique pourvu d'un tel batteur pourra aussi être notablement simplifiée, la matière élastique du bloc pouvant être surmoulée sur ladite masselotte, en même temps qu'elle est adhérisée par moulage sur lesdites armatures, la masselotte étant ainsi pourvue d'un enrobage de ladite matière. The manufacture of an elastic support provided with such a mixer can also be significantly simplified, the elastic material of the block being able to be overmolded on said counterweight, at the same time as it is adhered by molding on said frames, the counterweight being thus provided of a coating of said material.
Le batteur peut donc être mis en place moyennant une complication de la fabrication tout à fait négligeable, de meme que l'augmentation du prix matière. The mixer can therefore be set up with a completely negligible manufacturing complication, as well as the increase in the material price.
Un mode d'exécution de l'invention va maintenant être décrit à titre d'exemple nullement limitatif avec référence aux figures du dessin ci-annexé dans lequel
- la figure 1 représente schématiquement en élévation un support élastique classique, par exemple pour moteur à combustion interne
- la figure 2 représente le même support équipé conformément à l'invention ; et
- la figure 3 représente des graphiques montrant, en fonction de la fréquence des vibrations, la raideur dynamique du support de la figure 1 et celles du support de la figure 2 selon la masse de la masselotte du batteur, prise comme paramètre.An embodiment of the invention will now be described by way of non-limiting example with reference to the figures of the accompanying drawing in which
- Figure 1 shows schematically in elevation a conventional elastic support, for example for internal combustion engine
- Figure 2 shows the same support equipped in accordance with the invention; and
- Figure 3 shows graphs showing, as a function of the frequency of the vibrations, the dynamic stiffness of the support of Figure 1 and those of the support of Figure 2 according to the mass of the weight of the drummer, taken as a parameter.
Le dispositif de support élastique représenté à la figure 1 comporte un bloc d'élastomère ou analogue 1 inséré entre deux armatures métalliques, une armature mobile 2 propre à supporter par exemple un moteur à combustion interne de véhicule, et une armature fixe 3 propre à être assujettie à un longeron ou autre élément de sa carrosserie. The elastic support device shown in FIG. 1 comprises an elastomer block or the like 1 inserted between two metal frames, a movable frame 2 suitable for supporting, for example, an internal combustion engine of a vehicle, and a fixed frame 3 suitable for being subject to a spar or other element of its body.
On a constaté que la raideur dynamique d'un tel support en fonction de la fréquence des vibrations de l'armature 2 pouvait avoir l'allure représentée par la courbe C de la figure 3. On voit que cette courbe présente un pic de résonance dans le domaine acoustique, aux environs de 600 Hz. It was found that the dynamic stiffness of such a support as a function of the frequency of the vibrations of the armature 2 could have the appearance represented by the curve C in FIG. 3. It can be seen that this curve has a resonance peak in the acoustic domain, around 600 Hz.
Pour remédier à cet inconvénient, on équipe ce dispositif de la façon illustrée à la figure 2. Lors du moulage du bloc d'élastomère 1, on met en place latéralement une petite masselotte, par exemple en zamac, référencée 4, ce qui assure en même temps son enrobage dans cet élastomère. La masselotte se trouve ainsi automatiquement reliée au bloc d'élastomère 3 par une courte languette élastique 5. To remedy this drawback, this device is fitted in the manner illustrated in FIG. 2. When molding the elastomer block 1, a small counterweight is placed laterally, for example in zamak, referenced 4, which ensures in at the same time its coating in this elastomer. The flyweight is thus automatically connected to the elastomer block 3 by a short elastic tongue 5.
Grâce à cette disposition et avec une masselotte 4 de seulement quelques grammes, on a constaté que - de manière tout à fait surprenante - on pouvait modifier de façon très sensible la réponse du dispositif.Thanks to this arrangement and with a flyweight 4 of only a few grams, it has been found that - quite surprisingly - the response of the device can be very significantly modified.
Sur le graphique de la figure 3, on voit (courbe D) qu'avec une masselotte de 1 g le pic de résonance subit déjà un abaissement sensible - supérieur à 8 % ; ce pic est aussi légèrement décalé vers les fréquences plus basses. On the graph of Figure 3, we see (curve D) that with a weight of 1 g the resonance peak already undergoes a significant reduction - greater than 8%; this peak is also slightly shifted towards the lower frequencies.
Avec une masselotte de 5,5 g (courbe E), le pic de résonance est encore abaissé, mais décalé vers les fréquences plus hautes (environ 680 Hz). With a weight of 5.5 g (curve E), the resonance peak is further lowered, but shifted to the higher frequencies (around 680 Hz).
Avec une masselotte de 2,5 g (courbe F), le pic de résonance est beaucoup plus faible (environ - 50 % par rapport au pic de la courbe C) et ramené à une fréquence d'environ 520 Hz. C'est donc la masselotte de 2,5 g qui dans le cas de cet exemple fournit les meilleurs résultats, et c'est elle qui sera retenue. With a flyweight of 2.5 g (curve F), the resonance peak is much lower (approximately - 50% compared to the peak of curve C) and reduced to a frequency of approximately 520 Hz. the 2.5 g weight which in the case of this example provides the best results, and it is this which will be retained.
Ces résultats surprenants ne sont pas entièrement explicables, mais il est à supposer que l'effet de levier obtenu entre le bloc 1 et la masselotte 4 du fait de la languette élastique 5 n'est pas négligeable. Il peut expliquer qu'une valeur remarquablement faible de la masse de la masselotte suffise à modifier radicalement l'allure des courbes de réponse du dispositif en fréquence, et ceci au plus faible coût envisageable, et sans aucune complication de fabrication. These surprising results cannot be fully explained, but it is to be supposed that the leverage effect obtained between the block 1 and the counterweight 4 due to the elastic tongue 5 is not negligible. He can explain that a remarkably low value of the mass of the counterweight is sufficient to radically modify the shape of the response curves of the device in frequency, and this at the lowest possible cost, and without any manufacturing complication.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9504179A FR2732738B1 (en) | 1995-04-07 | 1995-04-07 | ELASTIC BEATER SUPPORT DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9504179A FR2732738B1 (en) | 1995-04-07 | 1995-04-07 | ELASTIC BEATER SUPPORT DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2732738A1 true FR2732738A1 (en) | 1996-10-11 |
FR2732738B1 FR2732738B1 (en) | 1997-06-13 |
Family
ID=9477884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9504179A Expired - Lifetime FR2732738B1 (en) | 1995-04-07 | 1995-04-07 | ELASTIC BEATER SUPPORT DEVICE |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2732738B1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2431639A1 (en) * | 1978-07-19 | 1980-02-15 | Ouest Cie | Resilient engine support system - has rubber block with inertial mass secured to outside by elastomer ring to act as phase shifting damper |
JPS57163747A (en) * | 1981-03-31 | 1982-10-08 | Tokai Rubber Ind Ltd | Anti-oscillation supporter for automobile engine |
JPS59219540A (en) * | 1983-05-27 | 1984-12-10 | Honda Motor Co Ltd | Dynamic damper mount |
JPS604643A (en) * | 1983-06-22 | 1985-01-11 | Mitsubishi Heavy Ind Ltd | Vibration preventive support |
US4727957A (en) * | 1985-12-25 | 1988-03-01 | Bridgestone Corporation | Rubber vibration isolator for muffler |
JPH0289827A (en) * | 1988-09-27 | 1990-03-29 | Kinugawa Rubber Ind Co Ltd | Vibration insulating support body |
JPH04126633A (en) * | 1990-09-18 | 1992-04-27 | Suzuki Motor Corp | Dynamic damper construction of engine mount |
-
1995
- 1995-04-07 FR FR9504179A patent/FR2732738B1/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2431639A1 (en) * | 1978-07-19 | 1980-02-15 | Ouest Cie | Resilient engine support system - has rubber block with inertial mass secured to outside by elastomer ring to act as phase shifting damper |
JPS57163747A (en) * | 1981-03-31 | 1982-10-08 | Tokai Rubber Ind Ltd | Anti-oscillation supporter for automobile engine |
JPS59219540A (en) * | 1983-05-27 | 1984-12-10 | Honda Motor Co Ltd | Dynamic damper mount |
JPS604643A (en) * | 1983-06-22 | 1985-01-11 | Mitsubishi Heavy Ind Ltd | Vibration preventive support |
US4727957A (en) * | 1985-12-25 | 1988-03-01 | Bridgestone Corporation | Rubber vibration isolator for muffler |
JPH0289827A (en) * | 1988-09-27 | 1990-03-29 | Kinugawa Rubber Ind Co Ltd | Vibration insulating support body |
JPH04126633A (en) * | 1990-09-18 | 1992-04-27 | Suzuki Motor Corp | Dynamic damper construction of engine mount |
Non-Patent Citations (5)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 005 (M - 184) 11 January 1983 (1983-01-11) * |
PATENT ABSTRACTS OF JAPAN vol. 009, no. 094 (M - 374) 24 April 1985 (1985-04-24) * |
PATENT ABSTRACTS OF JAPAN vol. 009, no. 117 (M - 381) 22 May 1985 (1985-05-22) * |
PATENT ABSTRACTS OF JAPAN vol. 014, no. 287 (M - 0988) 21 June 1990 (1990-06-21) * |
PATENT ABSTRACTS OF JAPAN vol. 016, no. 384 (M - 1296) 17 August 1992 (1992-08-17) * |
Also Published As
Publication number | Publication date |
---|---|
FR2732738B1 (en) | 1997-06-13 |
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