EP0307388B1 - Sound-absorbing encapsulation for an internal-combustion engine - Google Patents
Sound-absorbing encapsulation for an internal-combustion engine Download PDFInfo
- Publication number
- EP0307388B1 EP0307388B1 EP88890222A EP88890222A EP0307388B1 EP 0307388 B1 EP0307388 B1 EP 0307388B1 EP 88890222 A EP88890222 A EP 88890222A EP 88890222 A EP88890222 A EP 88890222A EP 0307388 B1 EP0307388 B1 EP 0307388B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- passage
- flange ring
- ring
- enclosure
- protective shield
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 238000005538 encapsulation Methods 0.000 title 1
- 238000007789 sealing Methods 0.000 claims description 20
- 230000001681 protective effect Effects 0.000 claims description 19
- 239000011810 insulating material Substances 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000002775 capsule Substances 0.000 description 17
- 238000009413 insulation Methods 0.000 description 10
- 239000012774 insulation material Substances 0.000 description 8
- 238000009415 formwork Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- 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 invention relates to a sound-absorbing casing for internal combustion engines with a sealed passage, in particular for leading out the exhaust manifold, in which a passage seal is provided between the engine block and the casing relative to this relative movements, the passage seal being between an inner flange ring fastened to the engine and one has outer, attached to the casing flange ring sealing ring made of rubber-elastic material, and wherein the sealing ring is inextricably linked to cylindrical surfaces of the flange rings.
- the casing In order to achieve really good engine noise insulation, the casing must encase the engine as completely as possible and must not have any unsealed passages.
- the fastening of the casing relative to the engine block must provide a highly elastic support for structure-borne noise insulation, and such fastening and also the passage seals of the casing have to absorb and compensate for the sometimes considerable relative movements that occur in the operating state.
- the known passage seals which consist of an elastomeric sealing ring vulcanized between two metal flange rings, can, provided that they are properly designed, seal the passages for engine parts that are not subject to a lot of heat, such as combustion air ducting, coolant and fuel lines and the like, with the necessary security, since these less warm parts do not endanger the temperature-sensitive sealing material.
- the passage seal becomes particularly difficult if the passage opening is covered by a capsule which is required for sound insulation reasons and which attaches to the casing and accommodates the exhaust gas manifold.
- a capsule which is required for sound insulation reasons and which attaches to the casing and accommodates the exhaust gas manifold.
- an oil-tight seal between the casing and the capsule must also be provided here, so that oil or the like does not penetrate into the hot capsule.
- a casing for internal combustion engines is known from AT-B 308475, which consists of soundproofing attached casing parts.
- an annular elastic element is arranged between the engine block and the casing.
- this is not able to absorb stronger vibrations, as they occur especially in the construction with wet formwork, if this is stiff and is only connected to the engine block in its lower region.
- the elastic element of heating is fully applied through the exhaust pipe.
- the invention is therefore based on the object to eliminate these deficiencies and to create a sound-absorbing formwork of the type described, which is characterized by a Relatively simple, yet resistant, oil-tight and sound-absorbing passage seal distinguishes which passage seal is particularly suitable for the connection of a dry exhaust gas capsule to a wet engine block casing.
- the invention solves this problem in that the inner flange ring carries a protective shield shielding the sealing ring on the passage side while leaving a space between them, and the remaining space is filled with a heat-resistant and sound-absorbing insulating material.
- This insulating material backfilled protective shield provides the elastic sealing ring with the necessary heat protection against the hot engine parts that are led out through the passage, whereby the insulating material, for example mineral wool such as Triton-Kaowool, also provides sound insulation.
- the sealing ring made of a corresponding elastomer can therefore fully fulfill its function as an oil-tight and elastic support connection between the engine block and the casing without impairment and heat hazard.
- the protective shield forms a connection face on the face against which the capsule abuts with a connection flange with the interposition of an insulating material layer.
- the insulation material layer which can consist of the same material as the insulation material filling of the passage seal, extends the thermal protection provided by the protective shield to the outer flange ring and also insulates the connection of the capsule to the casing itself. If an outwardly projecting edge leg of the protective shield forms the connection surface, this leg also results in a liquid barrier or the like, which prevents oil from penetrating. prevented in the connected capsule.
- Drain channels are provided between the outer flange ring and insulation material filling, which drain channels can easily be formed by a corrugation of the protective shield or flange ring. These drainage channels facilitate the separation of oil and prevent excessive contamination of the insulating material. For example, if unburned oil penetrates the passage area as a result of a defective exhaust seal, this oil cannot damage the seal, since it is drained out along the protective shield. The same applies in the case of a defective sealing ring, since the oil escaping from the interior of the casing can now escape to the outside along the outer flange ring or the protective shield. If such an oil leak is visible outside the seal, it is an early sign of seal damage and the need for repair.
- the inner flange ring when the exhaust manifold is led out, the inner flange ring surrounds the exhaust manifold at a distance and is attached to the cylinder head of the engine using a circumferential seal, a heat protection strip preferably being located between the flange ring and the exhaust manifold.
- a heat protection strip preferably being located between the flange ring and the exhaust manifold.
- the engine block 1 of an internal combustion engine is encased by a sound-absorbing casing 2, which forms a passage 4 for leading the exhaust manifold 3 out.
- the passage 4 is covered by a capsule 5, which connects to the casing 2 and is used for sound insulation of the exhaust gas manifold 3 subjected to structure-borne noise.
- a passage seal 6 which consists of an inner flange ring 7 fastened to the cylinder head 1a, an outer flange ring 8 tightly fastened to the casing 2 using a preferably liquid sealant, and a sealing ring 9 vulcanized in between the inner and outer flange ring consists of an elastomer, a pressed with the inner flange ring 7, the sealing ring 9 to the exhaust manifold 3 shielding shield 10 and a heat-resistant and sound-absorbing insulation material filling 11 for the space 12 between the shield 11, sealing ring 9 and flange ring 8.
- the inner sealing ring 7 sits bare on the cylinder head 1a, so that the cylinder head cooling is also effective for the flange ring 7, and a circumferential seal 13 made of an elastomer with a preferably round cross-section ensures the seal between the cylinder head 1a and the flange ring 7.
- the protective shield 10 detects one externally projecting edge leg 10a, which forms an end-face connection surface 14 for the capsule 5, wherein the capsule 5 with a connecting flange 15 with the interposition of an insulating material layer 16 adjoins this connecting surface 14 in a sound-insulating manner.
- the protective ring 10 and the insulating material filling 11 protect the sealing ring 9 from excessive heating and can also perform its sealing and supporting functions perfectly in the exhaust gas collector passage area.
- the insulation material filling 11 and the insulation material layer 16 additionally ensure excellent sound insulation in the transition area between the casing 2 and the capsule 5, so that effective engine noise insulation is also ensured in the exhaust gas collector area.
- the protective shield 10 also prevents oil or the like from entering the capsule 5 due to leaks in the exhaust seal or damage to the sealing ring 9, since this protective shield 10 replaces the oil in the lower region between the capsule 5 and the casing 2 derives outside.
- drainage channels 17 are advantageously provided between the protective shield 10 and the insulating material filling 11 or the insulating material layer 16, which are simply created by a corrugation 18 of the protective shield, wherein such channels can also be prepared between the outer flange ring 8 and the insulating material filling 11.
- An improvement in the heat protection for the passage seal 6 can be achieved if an annular gap is left between the inner flange ring 7 and the exhaust manifold line 3, into which a heat protection strip 19, for example made of asbestos, is inserted, whereby the heat transfer between the exhaust manifold 3 and the flange ring 7 is impaired.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Gasket Seals (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Die Erfindung bezieht sich auf eine schalldämmende Verschalung für Brennkraftmaschinen mit einem abgedichteten Durchtritt insbesondere zum Herausführen der Abgassammelleitung, bei der eine Durchtrittsdichtung zwischen Triebwerksblock und der gegenüber diesem Relativbewegungen ausführenden Verschalung vorgesehen ist, wobei die Durchtrittsdichtung einen zwischen einem inneren, am Motor befestigten Flanschring und einem äußeren, an der Verschalung befestigten Flanschring eingesetzten Dichtring aus gummielastischem Material aufweist, und wobei der Dichtring mit zylindrischen Flächen der Flanschringe unlösbar verbunden ist.The invention relates to a sound-absorbing casing for internal combustion engines with a sealed passage, in particular for leading out the exhaust manifold, in which a passage seal is provided between the engine block and the casing relative to this relative movements, the passage seal being between an inner flange ring fastened to the engine and one has outer, attached to the casing flange ring sealing ring made of rubber-elastic material, and wherein the sealing ring is inextricably linked to cylindrical surfaces of the flange rings.
Um eine wirklich gute Motorgeräuschdämmung zu erreichen, muß die Verschalung den Motor möglichst vollständig umhüllen und darf keine ungedichteten Durchtritte aufweisen. Außerdem ist bei der Befestigung der Verschalung gegenüber dem Motorblock für eine im hohen Maße elastische Abstützung zur Körperschalldämmung zu sorgen, und eine solche Befestigung und auch die Durchtrittsdichtungen der Verschalung haben die im Betriebszustand auftretenden, zum Teil beträchtlichen Relativbewegungen aufzunehmen und auszugleichen. Die bekannten Durchtrittsdichtungen, die aus einem zwischen zwei metallenen Flanschringen einvulkanisierten, elastomeren Dichtring bestehen, können unter Voraussetzung einer sachgemäßen Ausbildung die Durchtritte für wenig wärmebelastete Motorteile, wie Verbrennungsluftführung, Kühlmittel- und Kraftstoffleitung u.dgl., durchaus mit der erforderlichen Sicherheit abdichten, da eine Gefährdung des temperaturempfindlichen Dichtmaterials durch diese weniger warmen Teile unterbleibt. Durchtritte für heiße Motorteile, vor allem für die Abgassammelleitung, bereiten allerdings bisher wegen der gegebenen Hitzebelastung der Dichtung große Schwierigkeiten, wobei auch aufwendige, mit speziellen Kühleinrichtungen ausgestattete Konstruktionsvorschläge ohne gewünschten Erfolg bleiben. Hitzebeständige Metallbalgabdichtungen haben sich ebenfalls nicht bewährt, da sie nicht imstande sind, den Körperschall ausreichend zu dämmen.In order to achieve really good engine noise insulation, the casing must encase the engine as completely as possible and must not have any unsealed passages. In addition, the fastening of the casing relative to the engine block must provide a highly elastic support for structure-borne noise insulation, and such fastening and also the passage seals of the casing have to absorb and compensate for the sometimes considerable relative movements that occur in the operating state. The known passage seals, which consist of an elastomeric sealing ring vulcanized between two metal flange rings, can, provided that they are properly designed, seal the passages for engine parts that are not subject to a lot of heat, such as combustion air ducting, coolant and fuel lines and the like, with the necessary security, since these less warm parts do not endanger the temperature-sensitive sealing material. Passages for hot engine parts, especially for the exhaust manifold, have so far caused great difficulties due to the heat load on the seal, however, also complicated Design proposals equipped with special cooling devices remain without desired success. Heat-resistant metal bellows seals have also not proven themselves, since they are unable to adequately insulate structure-borne noise.
Besonders schwierig wird die Durchtrittsabdichtung, wenn die Durchtrittsöffnung von einer aus Gründen der Schalldämmung erforderlichen Kapsel abgedeckt ist, die an der Verschalung ansetzt und die Abgassammelleitung in sich aufnimmt. Hier muß zusätzlich zur Schalldämmung vor allem auch für eine ölfeste Abdichtung zwischen Verschalung und Kapsel gesorgt sein, damit ein Eindringen von Öl od. dgl. in die heiße Kapsel vermieden wird.The passage seal becomes particularly difficult if the passage opening is covered by a capsule which is required for sound insulation reasons and which attaches to the casing and accommodates the exhaust gas manifold. In addition to sound insulation, an oil-tight seal between the casing and the capsule must also be provided here, so that oil or the like does not penetrate into the hot capsule.
Aus der AT-B 308475 ist eine Verschalung für Brennkraftmaschinen bekannt, die aus schallisolierend angebrachten Verschalungsteilen besteht. Am Durchtritt des Auspuffrohres ist zwischen Triebwerksblock und Verschalung ein ringförmiges elastisches Element angeordnet. Dieses ist jedoch nicht in der Lage, stärkere Schwingungen aufzunehmen, wie sie vor allem bei der Bauweise mit naßer Verschalung auftreten, wenn diese steif ausgeführt und nur in ihrer unteren Region mit dem Triebwerksblock verbunden ist. Außerdem ist das elastische Element der Erhitzung durch das Auspuffrohr voll angesetzt.A casing for internal combustion engines is known from AT-B 308475, which consists of soundproofing attached casing parts. At the passage of the exhaust pipe, an annular elastic element is arranged between the engine block and the casing. However, this is not able to absorb stronger vibrations, as they occur especially in the construction with wet formwork, if this is stiff and is only connected to the engine block in its lower region. In addition, the elastic element of heating is fully applied through the exhaust pipe.
Gemäß der EP 0062030 B1 gibt es für einen Kapselanschluß bereits eine lose Kombination aus einer elastischen Dichtung und mehrschichtigen, wärmebeständigen und körperschalldämmenden Flachdichtungen, was aber trotz des damit verbundenen Herstellungs- und Montageaufwandes den an einen solchen Kapselanschluß gestellten Anforderungen nicht im gewünschten Umfang genügt.According to EP 0062030 B1, there is already a loose combination of an elastic seal and multilayer, heat-resistant and structure-borne soundproofing flat seals for a capsule connection, but this does not meet the requirements placed on such a capsule connection to the desired extent, despite the associated manufacturing and assembly costs.
Der Erfindung liegt daher die Aufgabe zugrunde, diese Mängel zu beseitigen und eine schalldämmende Verschalung der eingangs geschilderten Art zu schaffen, die sich durch eine verhältnismäßig einfache und dennoch widerstandsfähige, öldichte und schalldämmende Durchtrittsdichtung auszeichnet, welche Durchtrittsdichtung sich besonders für den Anschluß einer trockenen Abgassammlerkapsel an eine nasse Triebwerksblockverschalung eignet.The invention is therefore based on the object to eliminate these deficiencies and to create a sound-absorbing formwork of the type described, which is characterized by a Relatively simple, yet resistant, oil-tight and sound-absorbing passage seal distinguishes which passage seal is particularly suitable for the connection of a dry exhaust gas capsule to a wet engine block casing.
Die Erfindung löst diese Aufgabe dadurch, daß der innere Flanschring einen den Dichtring durchtrittseitig unter Freilassung eines Zwischenraumes abschirmenden Schutzschild trägt und der verbleibende Zwischenraum mit einem hitzebeständigen und schallabsorbierenden Dämmaterial ausgefüllt ist. Dieser dämmaterialhinterfüllte Schutzschild bietet dem elastischen Dichtring den erforderlichen Wärmeschutz gegenüber den durch den Durchtritt herausgeführten heißen Motorteilen, wobei das Dämmaterial, beispielsweise Mineralwolle wie Triton-Kaowool, zusätzlich für eine Schalldämmung sorgt. Der Dichtring aus einem entsprechenden Elastomer kann daher ohne Beeinträchtigung und Hitzegefährdung seine Funktion als öldichte und elastische Stützverbindung zwischen Motorblock und Verschalung voll erfüllen.The invention solves this problem in that the inner flange ring carries a protective shield shielding the sealing ring on the passage side while leaving a space between them, and the remaining space is filled with a heat-resistant and sound-absorbing insulating material. This insulating material backfilled protective shield provides the elastic sealing ring with the necessary heat protection against the hot engine parts that are led out through the passage, whereby the insulating material, for example mineral wool such as Triton-Kaowool, also provides sound insulation. The sealing ring made of a corresponding elastomer can therefore fully fulfill its function as an oil-tight and elastic support connection between the engine block and the casing without impairment and heat hazard.
Wird die Durchtrittsöffnung von einer an der Verschalung anschließenden Kapsel abgedeckt, bildet nach einer vorteilhaften Ausgestaltung der Erfindung der Schutzschild stirnseitig eine Anschlußfläche, an der die Kapsel mit einem Anschlußflansch unter Zwischenlage einer Dämmaterialschicht anliegt. Dadurch kommt es zu einem hinsichtlich der Schalldämmung lückenlosen Übergang zwischen Verschalung und Kapsel, der für eine hochwirksame Motorgeräuschdämmung Voraussetzung ist. Abgesehen davon, wird durch die Dämmaterialschicht, die aus gleichem Material wie die Dämmaterialfüllung der Durchtrittsdichtung bestehen kann, der durch den Schutzschild gegebene Wärmeschutz zum äußeren Flanschring hin erweitert und auch der Anschluß der Kapsel an der Verschalung selbst isoliert. Bildet ein auswärtsragender Randschenkel des Schutzschildes die Anschlußfläche, ergibt sich außerdem durch diesen Schenkel eine Flüssigkeitssperre, die das Eindringen von Öl od.dgl. in die angeschlossene Kapsel verhindert.If the passage opening is covered by a capsule adjoining the casing, according to an advantageous embodiment of the invention, the protective shield forms a connection face on the face against which the capsule abuts with a connection flange with the interposition of an insulating material layer. This results in a seamless transition between formwork and capsule in terms of sound insulation, which is a prerequisite for highly effective engine noise insulation. Apart from this, the insulation material layer, which can consist of the same material as the insulation material filling of the passage seal, extends the thermal protection provided by the protective shield to the outer flange ring and also insulates the connection of the capsule to the casing itself. If an outwardly projecting edge leg of the protective shield forms the connection surface, this leg also results in a liquid barrier or the like, which prevents oil from penetrating. prevented in the connected capsule.
Besonders günstig ist es dabei, wenn zwischen Schutzschild und Dämmaterialfüllung bzw. Dämmaterialschicht und/oder zwischen äußerem Flanschring und Dämmaterialfüllung Abflußkanäle vorgesehen sind, welche Abflußkanäle auf einfache Weise von einer Wellung des Schutzschildes bzw. Flanschringes gebildet sein können. Diese Abflußkanäle erleichtern die Absonderung auftretenden Öls und vermeiden eine zu starke Verschmutzung des Dämmaterials. Dringt beispielsweise infolge einer schadhaften Auspuffdichtung unverbranntes Öl in den Durchtrittsbereich ein, kann dieses Öl die Dichtung nicht beschädigen, da es dem Schutzschild entlang nach außen abgeleitet wird. Ähnliches gilt im Falle eines schadhaften Dichtringes, da nun das aus dem Inneren der Verschalung austretende Öl dem äußeren Flanschring oder dem Schutzschild entlang nach außen gelangen kann. Wird ein solcher Ölaustritt außerhalb der Dichtung sichtbar, ist das ein frühzeitiges Anzeichen eines Dichtungsschadens und der Notwendigkeit einer Reparatur.It is particularly advantageous if between the protective shield and insulation material filling or insulation material layer and / or Drain channels are provided between the outer flange ring and insulation material filling, which drain channels can easily be formed by a corrugation of the protective shield or flange ring. These drainage channels facilitate the separation of oil and prevent excessive contamination of the insulating material. For example, if unburned oil penetrates the passage area as a result of a defective exhaust seal, this oil cannot damage the seal, since it is drained out along the protective shield. The same applies in the case of a defective sealing ring, since the oil escaping from the interior of the casing can now escape to the outside along the outer flange ring or the protective shield. If such an oil leak is visible outside the seal, it is an early sign of seal damage and the need for repair.
Nach einer besonders vorteilhaften Ausgestaltung der Erfindung umgibt beim Herausführen der Abgassammelleitung der innere Flanschring die Abgassammelleitung mit Abstand und ist unter Verwendung einer Umfangsdichtung blank am Zylinderkopf des Motors anliegend befestigt, wobei vorzugsweise zwischen Flanschring und Abgassammelleitung ein Wärmeschutzstreifen sitzt. Speziell für den heiklen Abgassammlerdurchtritt kommt es so zu einem zusätzlichen Wärmeschutz für die eigentliche Dichtung, da der innere Flanschring durch den metallenen Kontakt mit dem Zylinderkopf über die Zylinderkopfkühlung mitgekühlt wird und der Wärmefluß zwischen Abgassammelleitung und innerer Flanschring durch den verbleibenden Luftspalt oder besser durch den eingesetzten Wärmeschutzstreifen, beispielsweise aus Asbest, unterbrochen ist. Die Umfangsdichtung aus einem elastomeren Werkstoff sorgt dabei für die Abdichtung des inneren Flanschringes gegenüber dem Zylinderkopf.According to a particularly advantageous embodiment of the invention, when the exhaust manifold is led out, the inner flange ring surrounds the exhaust manifold at a distance and is attached to the cylinder head of the engine using a circumferential seal, a heat protection strip preferably being located between the flange ring and the exhaust manifold. Especially for the delicate exhaust manifold passage, there is additional heat protection for the actual gasket, since the inner flange ring is also cooled by the metal contact with the cylinder head via the cylinder head cooling and the heat flow between the exhaust manifold and the inner flange ring through the remaining air gap or better through the one used Thermal protection strips, for example made of asbestos, is interrupted. The circumferential seal made of an elastomeric material ensures the sealing of the inner flange ring against the cylinder head.
In der Zeichnung ist der Erfindungsgegenstand rein schematisch anhand eines Ausführungsbeispieles veranschaulicht, und zwar zeigen
- Fig. 1
- einen Teil einer erfindungsgemäßen, schalldämmenden Verschalung im Vertikalschnitt,
- Fig. 2
- die Durchtrittsdichtung dieser Verschalung im Querschnitt größeren Maßstabes und
- Fig. 3
- einen Schnitt nach der Linie III-III der Fig. 2.
In the drawing, the subject matter of the invention is purely schematic illustrated using an exemplary embodiment, namely show
- Fig. 1
- a part of a soundproofing casing according to the invention in vertical section,
- Fig. 2
- the passage seal of this formwork in cross section on a larger scale and
- Fig. 3
- a section along the line III-III of FIG. 2nd
Der Triebwerksblock 1 einer Brennkraftmaschine ist von einer schalldämmenden Verschalung 2 umhüllt, die zum Herausführen der Abgassammelleitung 3 einen Durchtritt 4 bildet. Der Durchtritt 4 ist von einer Kapsel 5 abgedeckt, die an der Verschalung 2 anschließt und zur Schalldämmung der körperschallbeaufschlagten Abgassammelleitung 3 dient.The engine block 1 of an internal combustion engine is encased by a sound-absorbing casing 2, which forms a
Zur Abdichtung des Durchtrittes 4 ist eine Durchtrittsdichtung 6 vorgesehen, die aus einem inneren, am Zylinderkopf 1a befestigten Flanschring 7, einem äußeren, an der Verschalung 2 unter Verwendung eines vorzugsweise flüssigen Dichtmittels dicht befestigten Flanschring 8, einem zwischen inneren und äußeren Flanschring einvulkanisierten Dichtring 9 aus einem Elastomer, einem mit dem inneren Flanschring 7 verpreßten, den Dichtring 9 zur Abgassammelleitung 3 hin abschirmenden Schutzschild 10 sowie einer hitzebeständigen und schallabsorbierenden Dämmaterialfüllung 11 für den Zwischenraum 12 zwischen Schutzschild 11, Dichtring 9 und Flanschring 8 besteht. Der innere Dichtring 7 sitzt blank am Zylinderkopf 1a, so daß die Zylinderkopfkühlung auch für den Flanschring 7 wirksam ist, und eine Umfangsdichtung 13 aus einem Elastomer mit vorzugsweise rundem Querschnitt sorgt für die Abdichtung zwischen Zylinderkopf 1a und Flanschring 7. Der Schutzschild 10 weist einen nach außen ragenden Randschenkel 10a auf, der eine stirnseitige Anschlußfläche 14 für die Kapsel 5 bildet, wobei die Kapsel 5 mit einem Anschlußflansch 15 unter Zwischenlage einer Dämmaterialschicht 16 an diese Anschlußfläche 14 schalldämmend anschließt.To seal the
Durch den Schutzschild 10 und die Dämmaterialfüllung 11 wird der Dichtring 9 vor zu starker Erwärmung geschützt und kann seine Dicht- und Stützfunktionen auch im Abgassammlerdurchtrittsbereich einwandfrei erfüllen. Die Dämmaterialfüllung 11 und die Dämmaterialschicht 16 gewährleisten zusätzlich eine ausgezeichnete Schalldämmung im Übergangsbereich zwischen Verschalung 2 und Kapsel 5, so daß auch im Abgassammlerbereich eine wirkungsvolle Motorgeräuschdämmung gewährleistet ist.The
Der Schutzschild 10 verhindert außerdem, däß durch Leckstellen in der Auspuffdichtung oder durch eine Beschädigung des Dichtringes 9 in den Durchtrittsbereich eindringendes Öl od. dgl. in die Kapsel 5 gelangt, da dieser Schutzschild 10 das Öl im unteren Bereich zwischen Kapsel 5 und Verschalung 2 nach außen ableitet. Dazu sind vorteilhafterweise zwischen dem Schutzschild 10 und der Dämmaterialfüllung 11 bzw. der Dämmmaterialschicht 16 Abflußkanäle 17 vorgesehen, die einfach durch eine Wellung 18 des Schutzschildes entstehen, wobei auch zwischen äußerem Flanschring 8 und Dämmaterialfüllung 11 solche Kanäle vorbereitet sein können.The
Eine Verbesserung des Wärmeschutzes für die Durchtrittsdichtung 6 läßt sich erreichen, wenn zwischen innerem Flanschring 7 und Abgassammlerleitung 3 ein Ringspalt freigelassen wird, in den ein Wärmeschutzstreifen 19, beispielsweise aus Asbest, eingeschoben ist, wodurch der Wärmeübergang zwischen Abgassammelleitung 3 und Flanschring 7 beeinträchtigt wird.An improvement in the heat protection for the
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT2276/87 | 1987-09-09 | ||
| AT0227687A AT389744B (en) | 1987-09-09 | 1987-09-09 | SOUND-INSULATING PANELING FOR INTERNAL COMBUSTION ENGINES |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0307388A2 EP0307388A2 (en) | 1989-03-15 |
| EP0307388A3 EP0307388A3 (en) | 1989-11-29 |
| EP0307388B1 true EP0307388B1 (en) | 1991-10-23 |
Family
ID=3531349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88890222A Expired - Lifetime EP0307388B1 (en) | 1987-09-09 | 1988-09-01 | Sound-absorbing encapsulation for an internal-combustion engine |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4836160A (en) |
| EP (1) | EP0307388B1 (en) |
| JP (1) | JPH0786328B2 (en) |
| AT (1) | AT389744B (en) |
| CA (1) | CA1297413C (en) |
| DE (1) | DE3865790D1 (en) |
| SU (1) | SU1602398A3 (en) |
| YU (1) | YU47292B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716018Y2 (en) * | 1988-05-19 | 1995-04-12 | スズキ株式会社 | Exhaust manifold heat shield |
| JPH072975Y2 (en) * | 1988-05-24 | 1995-01-30 | スズキ株式会社 | Exhaust manifold cover assembly structure |
| DE3823685C1 (en) * | 1988-07-13 | 1989-05-24 | Mtu Friedrichshafen Gmbh | |
| DE4136304A1 (en) * | 1991-11-04 | 1993-05-06 | Kloeckner-Humboldt-Deutz Ag, 5000 Koeln, De | Encapsulated piston engine - has protective tube round exhaust pipe where it passes out of housing with insulating material attached to tube and housing |
| DE10054310B4 (en) * | 2000-11-02 | 2004-01-29 | Wilo Gmbh | Thermal insulation shell for hydraulic equipment |
| DE10119892C2 (en) * | 2001-04-24 | 2003-04-03 | Skf Ab | Cover, in particular for damping the noise of an internal combustion engine |
| US9105391B2 (en) | 2006-08-28 | 2015-08-11 | Avago Technologies General Ip (Singapore) Pte. Ltd. | High voltage hold-off coil transducer |
| JP4941126B2 (en) * | 2007-06-27 | 2012-05-30 | 国産部品工業株式会社 | Sound insulation cover |
| JP5468441B2 (en) * | 2010-03-31 | 2014-04-09 | 本田技研工業株式会社 | Crankcase for internal combustion engine |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT308475B (en) * | 1969-09-08 | 1973-07-10 | List Hans | Soundproof casing for internal combustion engines |
| US4011849A (en) * | 1976-02-05 | 1977-03-15 | Deere & Company | Combined engine and muffler compartment |
| JPS5611615Y2 (en) * | 1976-11-27 | 1981-03-17 | ||
| US4164262A (en) * | 1977-09-23 | 1979-08-14 | Hans List | Motor vehicle |
| AT350855B (en) * | 1977-11-23 | 1979-06-25 | List Hans | COMBUSTION MACHINE |
| DE2855220A1 (en) * | 1978-12-21 | 1980-07-10 | Hatz Motoren | INTERNAL COMBUSTION ENGINE WITH NOISE-REDUCING PANELING |
| US4338890A (en) * | 1979-01-31 | 1982-07-13 | Caterpillar Tractor Co. | Hood, muffler and air cleaner module for an internal combustion engine |
| AT387624B (en) * | 1981-03-31 | 1989-02-27 | Steyr Daimler Puch Ag | PISTON PISTON ENGINE |
| DE3305765C1 (en) * | 1983-02-19 | 1984-06-28 | Goetze Ag, 5093 Burscheid | Sealing cover |
| AT384278B (en) * | 1983-03-03 | 1987-10-27 | Steyr Daimler Puch Ag | PISTON PISTON ENGINE |
-
1987
- 1987-09-09 AT AT0227687A patent/AT389744B/en not_active IP Right Cessation
-
1988
- 1988-09-01 DE DE8888890222T patent/DE3865790D1/en not_active Expired - Fee Related
- 1988-09-01 EP EP88890222A patent/EP0307388B1/en not_active Expired - Lifetime
- 1988-09-02 JP JP63218643A patent/JPH0786328B2/en not_active Expired - Lifetime
- 1988-09-05 YU YU168488A patent/YU47292B/en unknown
- 1988-09-08 CA CA000576745A patent/CA1297413C/en not_active Expired - Fee Related
- 1988-09-08 SU SU884356400A patent/SU1602398A3/en active
- 1988-09-08 US US07/241,859 patent/US4836160A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| AT389744B (en) | 1990-01-25 |
| JPS6483823A (en) | 1989-03-29 |
| CA1297413C (en) | 1992-03-17 |
| EP0307388A2 (en) | 1989-03-15 |
| YU168488A (en) | 1990-08-31 |
| US4836160A (en) | 1989-06-06 |
| JPH0786328B2 (en) | 1995-09-20 |
| ATA227687A (en) | 1989-06-15 |
| DE3865790D1 (en) | 1991-11-28 |
| EP0307388A3 (en) | 1989-11-29 |
| YU47292B (en) | 1995-01-31 |
| SU1602398A3 (en) | 1990-10-23 |
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