EP0276738A2 - Moteur à combustion interne avec capot d'insonorisation - Google Patents

Moteur à combustion interne avec capot d'insonorisation Download PDF

Info

Publication number
EP0276738A2
EP0276738A2 EP88100748A EP88100748A EP0276738A2 EP 0276738 A2 EP0276738 A2 EP 0276738A2 EP 88100748 A EP88100748 A EP 88100748A EP 88100748 A EP88100748 A EP 88100748A EP 0276738 A2 EP0276738 A2 EP 0276738A2
Authority
EP
European Patent Office
Prior art keywords
capsule
sound
combustion engine
internal combustion
insulating
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
Application number
EP88100748A
Other languages
German (de)
English (en)
Other versions
EP0276738B1 (fr
EP0276738A3 (en
Inventor
Ernst-Siegfried Hartmann
Herbert Schleiermacher
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0276738A2 publication Critical patent/EP0276738A2/fr
Publication of EP0276738A3 publication Critical patent/EP0276738A3/de
Application granted granted Critical
Publication of EP0276738B1 publication Critical patent/EP0276738B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 an internal combustion engine, surrounded by a sound-absorbing capsule, which is fastened together with the machine holders of the internal combustion engine to the support bearings of a vehicle or on a foundation.
  • An encapsulated internal combustion engine is known from DE-PS 28 26 145.
  • the machine absorbs the sound-absorbing capsule with its support bearings.
  • the machine is fastened to the support bearings with the interposition of elastic elements by means of bolts, the capsule with parts of its wall is fastened directly to the support bearings by the same bolts and supported by them, and between the wall parts of the capsule and the other wall areas which are directly attached to the support bearings are sound-absorbing Intermediate pieces arranged.
  • the machine holder or boom sits with its sound-insulating bearing part inside the sound-absorbing capsule and this in turn within the support bearing.
  • the capsule and machine holder are fastened to the support bearing with one and the same bolt.
  • Machine holder and capsule are connected to one another with the same bolt in such a way that when this bolt is released, both the capsule and the machine lose their attachment to the support bearing. It is therefore not possible to loosen the capsule without loosening the fastening of the machine holder.
  • Another disadvantage is that the structure-borne noise-isolating elements, which usually consist of rubber, are located within the noise-isolating capsule. This sound-insulating capsule naturally hinders the heat exchange with the surroundings, so that the structure-borne sound-insulating elements made of rubber are exposed to strong heat from the internal combustion engine. Over time, this leads to a change in the rubber, which causes embrittlement and thus a decrease in the structure-borne noise insulation. Furthermore, it is not possible to prevent the capsule from warping due to the difference in level if the support bearings are of different heights.
  • the present invention has for its object to encapsulate an internal combustion engine so that the sound-insulating support is not exposed to the heat of the internal combustion engine and an easy detachability of the capsule is possible without detaching the internal combustion engine from its support bearings or its foundation, and that it is possible is to carry out a simple and easy level adjustment for the capsule at different heights of the foundation attachment points.
  • the machine holders penetrate the sound-absorbing capsule, so that the fastening points on the support bearings of a vehicle or on a foundation lie outside the capsule.
  • the structure-borne sound-insulating, elastic elements are advantageously not exposed to the heat radiation and lubricant secretions of the internal combustion engine.
  • lubricants and heat have a damaging effect on the elastic elements, which are predominantly made of rubber, so that they lose their functionality.
  • the holders of the sound-insulating capsule of the internal combustion engine are each attached together with a machine holder with interposed structure-borne sound-insulating, elastic elements by means of a threaded bolt on the support bearings of a vehicle or on a foundation.
  • the capsule holder is arranged above the machine holder.
  • An internal combustion engine is usually fastened to the support bearings of a vehicle or to a foundation at a plurality of fastening points. These attachment points should be at a prescribed level. If one of the fastening points deviates in height from the prescribed level, the sound-absorbing capsule may be subject to tension in its capsule walls, which can negate the desired purpose of sound insulation. For this reason, it is advantageous according to the invention to use at least one holder To arrange the capsule between the capsule and the holder or between the holder and the threaded bolt a leveling element between the capsule and the support bearing or the capsule and the foundation.
  • the sound-absorbing capsule around the internal combustion engine consists of at least two capsule halves, which are fastened with their holders to the support bearings or on the foundation exclusively with the interposed structure-borne sound-insulating, elastic elements. Fastening the capsule exclusively on the support bearings or on the foundation has the particular advantage that no attachment point on the internal combustion engine can transmit sound directly to the capsule. In addition, the capsule can be removed in whole or in part without requiring manipulation of the internal combustion engine.
  • the holder of the capsule with the structure-borne noise-isolating, elastic elements and the leveling-allowing resilient elements can be fastened directly to the support bearings of the vehicle or on the foundation via the threaded bolts.
  • This type of attachment is particularly space-saving, since the internal combustion engine and capsule are each attached to one attachment point using only one threaded bolt. After loosening just one screw, the capsule and the internal combustion engine can be lifted off the support bearings or the foundation together.
  • Another embodiment of the fastening according to the invention is that between the structure-borne sound-insulating, elastic elements attached to the capsule holders and the level compensating fe derenden elements on the one hand and the threaded bolt on the other a rigid connector is arranged.
  • the capsule holder is first attached to the rigid connecting piece with a structure-borne sound-insulating, elastic element or the resilient element which allows a level compensation, a separate screw or a comparable fastening element is used for this.
  • Only the rigid connector is attached to the support bearing or on the foundation via the threaded bolt.
  • This type of attachment advantageously allows, for example for service work, the capsule to be removed from the internal combustion engine without the machine having to be stopped, since the attachment of the machine holder is not released. The machine is still firmly connected to the support bearings or the foundation even without a capsule.
  • Possible sound radiation via the machine holder can advantageously be remedied in that the machine holder and the fastening point are additionally shielded by a capsule.
  • This additional capsule can be easily removed regardless of the capsule surrounding the internal combustion engine in order to reach the fastening points.
  • a pot-shaped capsule for example, is sufficient for this, which is placed over a machine holder and the attachment point from above.
  • This small capsule can be attached to the large capsule, for example, by a simple plug-in connection with the interposition of sound-absorbing materials, such as rubber sheets.
  • An attachment to the threaded bolt with which the machine holder and the capsule holder are attached to the support bearings of a vehicle or to the foundation is also possible.
  • a simple plug with a hat-shaped attachment would suffice, whereby attachment to the capsule of the internal combustion engine can be omitted.
  • Fig. 1 the common attachment of the capsule and the internal combustion engine is shown with a threaded bolt.
  • the internal combustion engine is hidden behind the wall of the capsule 1, which is only shown in a small part. Only part of the housing 2 can be seen of the machine, on which the machine holder 3 with two screws ben 4 is attached. At the point of passage of the machine housing 2 through the capsule 1 there is an elastic insulating material 5 between the capsule and the housing, which is intended to prevent the sound from escaping from the capsule 1.
  • the machine holder 3 is mounted in a sound-insulating, elastic element 6.
  • This element 6 rests on the foundation 7.
  • the attachment takes place via a threaded bolt 8, which is anchored in the foundation 7.
  • the threaded bolt 8 pierces the sound-insulating, elastic element 6 and thus fixes it in place.
  • the capsule 1 is attached above the attachment of the machine holder 3.
  • a sound-insulating, elastic element 10 is inserted in this hole. It supports the capsule 1 via its holder 9 on the sound-insulating, elastic element 6, which carries the machine holder 3.
  • the sound-insulating, elastic element 10, which penetrates the holder of the capsule 9, is pierced in the center by the threaded bolt 8.
  • the machine holder 3 and the holder of the capsule 9 are each fastened via their sound-insulating, elastic elements 6 and 10 with a nut 11 which is screwed onto the threaded bolt 8. So that the sound-insulating, elastic element 10 is not compressed when the nut 11 is tightened, the washer 12 is supported on a spacer sleeve 13, which surrounds the threaded bolt 8 and also pierces the sound-insulating, elastic element 10.
  • the capsule 1 After loosening the nut 11 and lifting the disc 12, the capsule 1 can be lifted off the foundation 7 without the internal combustion engine losing its hold on the foundation.
  • the mounting of the holder of the capsule 9 in the sound-insulating, elastic element 10 prevents the transmission of structure-borne sound from the capsule 1 to the foundation 7 and, conversely, no sound is transmitted from the foundation 7 to the capsule holder 9.
  • FIG. 2 the attachment of the capsule is shown by means of a leveling resilient element on a rigid connector, which is fastened together with the machine holder on a foundation.
  • Structural parts of the same type as in FIG. 1 are provided with the same reference numbers.
  • the capsule 1 which surrounds the internal combustion engine is also shown.
  • the capsule is broken at one point and the housing 2 of the internal combustion engine can be seen.
  • the machine holder 3 is, as in FIG. 1, fastened to the housing 2 of the internal combustion engine by means of two screws 4.
  • the machine holder 3 is mounted in a sound-insulating, elastic element 6, which is supported on a foundation 7. The attachment is made at this attachment point by means of a screw 8.
  • the capsule 1 is not attached directly with the screw 8, which can also be a threaded bolt, which holds the machine holder 3 with its sound-insulating, elastic element 6, attached to the foundation 7.
  • the screw 8 With the screw 8, a rigid connecting piece 14 is fastened together with the machine holder 3 on the foundation 7. Only on this rigid connecting piece 14 is the holder 9 of the capsule 1 fastened with its own fastening element 15, in the present case a screw.
  • the capsule is fastened via a spring element 16 which allows level compensation.
  • the resilient element 16 which allows level compensation, is constructed as follows:
  • a sleeve 17 is attached to the rigid connector 14. This sleeve 17 is supported against the connecting piece 14 and a disk 18.
  • the sleeve 17 is surrounded by a spiral spring 19 which on the one hand rests on the holder 9 of the capsule 1 and on the other hand abuts a disk 20.
  • a layer of the same material 22 is located between the holder 9 and the connecting piece 14.
  • a sound-absorbing capsule is now fastened to the foundation 7, the situation can arise due to a different level of the fastening points that the capsule can no longer be fastened with a simple sound-insulating, elastic element 10, as in FIG. 1.
  • a corresponding level compensation is achieved with the resilient element 16.
  • the holder 9 of the capsule 1 has the option of being within a recess of the To move sleeve 17 up or down.
  • the spring 19 acts with a certain force on the holder 9 and thereby prevents uncontrolled vibrations.
  • a structure-borne sound transmission from the connector 14 to the holder 9 or vice versa is prevented by the layers of sound-absorbing material 21 and 22.
  • the coil spring 19 can also be replaced by any other form of springs, for example cup springs.
  • the capsule 1 can be detached from its attachment points without the attachment of the internal combustion engine having to be detached at the same time.
  • FIGS. 1 and 2 are only exemplary embodiments. Accordingly, it is also possible in FIG. 1 to fasten the holder 9 on the sound-insulating, elastic element 10 according to FIG. 2 with a screw on a rigid connecting piece 14 and only this, above the sound-insulating, elastic element 6, by means of the nut 11 on the threaded bolt 8. Likewise, it is possible to fasten the holder 9 directly by means of the threaded bolt 8 with the interposition of a resilient element 16 which allows level compensation.
  • a further possibility is also to fasten the capsule with its holders with the interposition of the sound-insulating, elastic element 6 or the springy element 16, which allows level compensation, to be attached directly to the support bearings of a vehicle or on a foundation at separate fastening points.
  • Fig. 3 shows a side view of the embodiment of FIG. 1, partially in section.
  • the machine holder and the fastening point are surrounded by an additional sound-absorbing capsule 23.
  • Fig. 3 it can be clearly seen how the wall of the capsule 1 springs back and forms a niche into which the machine holder 3 protrudes through an opening in the capsule wall.
  • the contour of the housing 2 of the internal combustion engine to which the machine holder 3 is fastened is indicated.
  • the niche in the capsule 1 can easily be covered by a capsule 23.
  • a U-shaped groove 24 is attached to the capsule wall above the recess, which is filled with a sound-absorbing material 25.
  • the capsule 23 hangs on an L-shaped flange 26 therein.
  • the capsule 23 can be lined on the inside with a sound-absorbing material 27. Where the capsule 23 abuts the large capsule 1, measures can be taken to prevent sound transmission, for example rubber strips which are pushed over the edges of the wall of the capsule 23.
  • the capsule 23 is open at the bottom and can be easily plugged into the capsule 1 without major assembly work the U-shaped bar 24 are attached.
  • the capsule 23 prevents the propagation of sound from the machine holder 3. Since the capsule 23 is open at the bottom, it ensures air circulation around the sound-insulating, elastic elements 6 and 10, so that no disadvantageous heating can occur.
  • the capsule 23 can, however, also be attached directly to the foundation 7 or to the threaded bolt 8 or to the holder 9 of the capsule by means of a separate holder. With these alternatives, however, care must always be taken to ensure that no sound can be transmitted to the capsule 23.

Landscapes

  • 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)
  • Vibration Prevention Devices (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
EP88100748A 1987-01-24 1988-01-20 Moteur à combustion interne avec capot d'insonorisation Expired - Lifetime EP0276738B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3702023 1987-01-24
DE19873702023 DE3702023A1 (de) 1987-01-24 1987-01-24 Brennkraftmaschine mit einer schalldaemmenden kapsel

Publications (3)

Publication Number Publication Date
EP0276738A2 true EP0276738A2 (fr) 1988-08-03
EP0276738A3 EP0276738A3 (en) 1989-06-14
EP0276738B1 EP0276738B1 (fr) 1991-01-02

Family

ID=6319436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100748A Expired - Lifetime EP0276738B1 (fr) 1987-01-24 1988-01-20 Moteur à combustion interne avec capot d'insonorisation

Country Status (2)

Country Link
EP (1) EP0276738B1 (fr)
DE (2) DE3702023A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404181A1 (fr) * 1989-06-22 1990-12-27 Klöckner-Humboldt-Deutz Aktiengesellschaft Suspension élastique d'une enveloppe pour un moteur à combustion interne
CN103115569A (zh) * 2012-10-22 2013-05-22 深圳市嘉瀚科技有限公司 具有无线传输功能的整体集成式光电传感器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB145062A (en) * 1915-12-18 1920-12-09 Daimler Motoren Improvements in and connected with means for preventing the transmission of sound and vibration from machines and parts thereof
DE2012564A1 (de) * 1969-03-20 1970-09-17 List, Dipl.-Ing. Dr.Dr.h.c. Hans, Graz (österrreich) Schallisolierendes Bauelement
FR2317500A1 (fr) * 1975-06-26 1977-02-04 Cummins Engine Co Inc Dispositif d'insonorisation, notamment pour moteurs diesel
FR2406724A1 (fr) * 1977-10-18 1979-05-18 Volkswagenwerk Ag Moteur a combustion interne, a blindage d'insonorisation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2262467A (en) * 1940-07-26 1941-11-11 Clark Equipment Co Engine enclosure
DE2739944C2 (de) * 1977-09-05 1982-09-16 Motorenfabrik Hatz Gmbh & Co Kg, 8399 Ruhstorf Geräuschdämmende Verschalung einer Brennkraftmaschine
DE2826145C2 (de) * 1978-06-15 1986-04-10 Volkswagen AG, 3180 Wolfsburg Gekapselte Brennkraftmaschine, insbesondere für ein Kraftfahrzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB145062A (en) * 1915-12-18 1920-12-09 Daimler Motoren Improvements in and connected with means for preventing the transmission of sound and vibration from machines and parts thereof
DE2012564A1 (de) * 1969-03-20 1970-09-17 List, Dipl.-Ing. Dr.Dr.h.c. Hans, Graz (österrreich) Schallisolierendes Bauelement
FR2317500A1 (fr) * 1975-06-26 1977-02-04 Cummins Engine Co Inc Dispositif d'insonorisation, notamment pour moteurs diesel
FR2406724A1 (fr) * 1977-10-18 1979-05-18 Volkswagenwerk Ag Moteur a combustion interne, a blindage d'insonorisation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404181A1 (fr) * 1989-06-22 1990-12-27 Klöckner-Humboldt-Deutz Aktiengesellschaft Suspension élastique d'une enveloppe pour un moteur à combustion interne
CN103115569A (zh) * 2012-10-22 2013-05-22 深圳市嘉瀚科技有限公司 具有无线传输功能的整体集成式光电传感器

Also Published As

Publication number Publication date
DE3702023A1 (de) 1988-08-04
EP0276738B1 (fr) 1991-01-02
DE3861324D1 (de) 1991-02-07
EP0276738A3 (en) 1989-06-14

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