EP0252178B2 - Enveloppe pour moteur de propulsion dans les automobiles - Google Patents

Enveloppe pour moteur de propulsion dans les automobiles Download PDF

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Publication number
EP0252178B2
EP0252178B2 EP86109435A EP86109435A EP0252178B2 EP 0252178 B2 EP0252178 B2 EP 0252178B2 EP 86109435 A EP86109435 A EP 86109435A EP 86109435 A EP86109435 A EP 86109435A EP 0252178 B2 EP0252178 B2 EP 0252178B2
Authority
EP
European Patent Office
Prior art keywords
basic
engine
casing
casing member
capsule
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
Application number
EP86109435A
Other languages
German (de)
English (en)
Other versions
EP0252178A1 (fr
EP0252178B1 (fr
Inventor
Manfred Stiglmaier
Manfred Schiller
Hans Jürgen Drewitz
Rudolf Hörmann
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8195261&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0252178(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Priority to AT86109435T priority Critical patent/ATE50024T1/de
Priority to DE8686109435T priority patent/DE3668664D1/de
Priority to EP86109435A priority patent/EP0252178B2/fr
Priority to JP62170836A priority patent/JPS6325322A/ja
Publication of EP0252178A1 publication Critical patent/EP0252178A1/fr
Application granted granted Critical
Publication of EP0252178B1 publication Critical patent/EP0252178B1/fr
Publication of EP0252178B2 publication Critical patent/EP0252178B2/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 a device for soundproofing a drive motor in a motor vehicle, in particular a commercial vehicle, by means of a capsule enclosing it at a short distance.
  • the cooling flow of a cooling fan is to be guided through the capsule.
  • Such a passage of cooling air through a closed muffler capsule has the purpose of cooling the additional motor assemblies arranged within the muffler capsule in order to keep the temperature increase caused by the capsule or the engine's own heat development that cannot be dissipated within reasonable limits.
  • a disadvantage of carrying the cooling air of a cooling fan through the capsule is that the cooling air inlet and outlet openings have to be made relatively large, in particular in the case of larger motors, and are therefore very difficult to protect against the escape of sound from the capsule.
  • a very significant disadvantage of the capsule described in the publication is that the auxiliary units are difficult to access for maintenance and repair purposes, even if closable openings are provided.
  • a device for sound damping of motors described at the outset is also known from DT-PS 306 982.
  • this document does not deal with the problem of heat balance in the case of encapsulated motors and also gives no indication of how auxiliary units of the encapsulated motors can be protected against overheating.
  • a device for soundproofing an internal combustion engine in a motor vehicle by means of a capsule enclosing it at a short distance according to US-A4 137 888 is known.
  • the capsule is self-supporting and multi-part and consists of a capsule body, an upper cover and an oil pan cladding. With the exception of the injection pump, all auxiliary units are outside the casing.
  • a device for soundproofing an internal combustion engine in a motor vehicle is known from DE-B-2 043 280, namely by means of a capsule enclosing the internal combustion engine at a short distance, which is designed to be self-supporting and in several parts, and from a capsule base body which is provided with a
  • the basic motor forms an assembly unit, and consists of an upper cover and oil pan cladding detachably connected to the basic capsule body, the basic capsule body having breakthroughs for connecting the motor to its retrofittable or exchangeable ancillary units.
  • auxiliary units such as V-belts, V-belt pulley and a fan have connection capsules, partially or in some areas, which are connected to the capsule base body.
  • the invention has for its object to provide a generic sound damping device which has a high degree of damping, which is designed to save space and weight, good accessibility to the drive motor and the associated units for maintenance and repair work and at the same time allows operating temperatures of the drive motor and to keep further drive and auxiliary units low despite the sound absorption.
  • the characterizing features of claim 1 Since the capsule is arranged relatively close to the motor contour due to the exclusion of the auxiliary units, the sound attenuation begins immediately where the sound is generated, so that only a small area is illuminated by the main noise source.
  • the exclusion of the auxiliary units has the further considerable advantage that only a small amount of air is used, which is not defined as cooling air but as purge air. This eliminates the need for a correspondingly large cooling fan, since the small amount of purge air is only used to effectively counteract, for example, an explosion hazard due to the accumulation of gases.
  • An essential advantage of the device according to the invention is that it is easy to maintain, repair and install; the capsule division optimally takes into account the tape production by integrating the cubic, self-supporting capsule base body as an assembly part in the tape production.
  • the intervention options remain almost the same as for the unenclosed motor.
  • the upper cover By removing the upper cover, the following can be replaced: valve cover, cylinder heads, injector holder, screw connections of the injection lines, exhaust manifold and all corresponding seals.
  • the oil pan cladding is also removed, the following can also be replaced: oil pan, pistons, connecting rods, cylinder liners, connecting rod bearings, crankshaft bearings and all corresponding seals and the like.
  • the capsule body is part of the engine and only needs to be dismantled if the crankcase is defective, e.g. due to frost damage.
  • the capsule is a self-supporting structure provided with openings for the auxiliary units and should therefore not be understood as a series of facing shells. Because the sound damping an internal combustion engine is a very complex process, the measures described above must be supplemented by further, mainly additional encapsulation and primary sound insulation.
  • the effect of the purge air can be increased by air movement inside the capsule due to thermal effects and by the air flowing out of the radiator fan. In this way, the capsule is aerated with a small amount of purge air to avoid the accumulation of flammable gases. Cooling air is not required because the heat-generating accessories are outside the capsule and the engine itself is water-cooled.
  • the vibrating metals connecting the capsule base body to the base motor are arranged on the outside of the capsule base body. In this way, they are visible, measurable and interchangeable without having to disassemble the capsule. They are also advantageously not influenced by the temperature prevailing in the capsule, which increases their resistance to aging.
  • a partitioned space is provided around the exhaust manifold with corresponding supply and exhaust air openings, the partitioned space being formed by an additional capsule integrally associated with one half of the capsule base body and the other half with the upper cover, and through a partition wall encompassing the exhaust manifold inlet is formed.
  • the air heated at the exhaust manifold is directed upwards, so that cold air (approx. 330 K) can be drawn in from the capsule and the air movement inside the capsule is supported.
  • a quasi "divided room” with corresponding supply and exhaust air openings is formed around the exhaust manifold.
  • Cooling in the area mentioned also makes sense because partial overheating is avoided and the use of particularly expensive materials (seals and high-quality alloys for exhaust manifolds and screws) is eliminated. Coking of the engine oil on the inside of the valve covers and heating of the cylinder head are also avoided.
  • an additional damping against the noise resulting from axially similar vibrations is attached to a torsion damper consisting of a primary part and a rubber part, whereby both sides of the end faces of the torsion damper are provided, one directly and the other via Connection plates, which are arranged within the V-belt guide, are connected to the outer wall of the capsule base body.
  • V-belt pulleys e.g. B. for water pump and alternator to decouple structure-borne noise
  • V-belt pulleys consisting of primary and secondary parts, which are connected to one another at the end face via several elastomer rings or the like and have a small annular space filled with viscose liquid on the inside.
  • Pressed V-belt pulleys made of sheet metal, as are often used in diesel engines, are unsuitable for engines with capsules.
  • V-belt pulleys must either have much more mass or, as the invention shows, there must be structure-borne noise decoupling. Additional damping is achieved by introducing viscose liquid between the hub parts.
  • the invention is illustrated in a large number of exemplary embodiments.
  • FIG. 1 and 2 show an internal combustion engine (3) with a complete capsule (1), which consists of a capsule base body (2), an upper cover (4) and an oil pan lining (5).
  • the individual capsule components are preferably connected to one another via commercially available quick fasteners.
  • a serious feature of this capsule arrangement is that everyone is not obvious for a test run essential auxiliary units are outside the capsule and additional measures have been taken to reduce their noise share in the overall noise level. In this way, the cooling of the heat-radiating auxiliary units is eliminated, which, if they were arranged in the capsule, would require a cooling air flow and thus an additional large-volume cooler. However, it is sufficient to branch off a very small amount of purge air from the radiator fan so that no inflammable gases can form inside the capsule.
  • Fig. 3 shows the connection of the capsule body (2) to the motor housing (8), namely by means of vibrating metal elements (6, 7), which are attached to the outside of the capsule, so that each one can be replaced without disassembling the capsule itself.
  • Fig. 4 shows the encapsulation of the exhaust manifold (9) by means of a capsule part (11), which is assigned in one piece to the capsule body (2) and the other half in one piece to the upper cover (4).
  • a partition (12) By arranging a partition (12) on the engine-facing part of the exhaust manifold, enclosing the same, a partitioned space (10) is created, whereby the air heated at the exhaust manifold is directed upwards and cold air (approx. 330 K) is drawn in from the lower capsule area .
  • the cutting disc (12) consists of a sheet with an insulating layer (14) and a steel sheet (13) attached to it, on which a further steel sheet (15) is arranged at a distance.
  • Fig. 5 shows an oil filter head (16) with a spaced absorbent facing (17). This arrangement allows easy access to the oil filter at any time to perform maintenance or cleaning tasks on it.
  • Fig. 6 shows the charging group (18), (gas turbine + compressor) with a noise-absorbing front shell (19) arranged at a distance from it.
  • Fig. 7 shows a torsion damper (23) and Fig. 8 shows the arrangement of this torsion damper in a front view.
  • the primary part (20) of the torsion damper (23) attached to the crankshaft is connected via a rubber part (22) to a secondary part (21) containing the V-belt grooves.
  • Front shells (24, 25) are arranged on the end face of the torsion damper (23), the front shell (24) being attached directly and the front shell (25) via connecting plates (26) on the outer wall of the capsule base body.
  • the size of the facing shells corresponds to the diameter of the torsion damper (23).
  • the connecting plates (26) lie within the V-belt guide (27) of the torsion damper (23), alternator V-belt pulley (28) and water pump V-belt pulley (29).
  • the facing shells (24, 25) can also be firmly connected to the torsion damper (23).
  • the V-belt pulleys (28, 29) consist of a primary part (30) and a secondary part (31). These are connected to one another at the end face via elastomer rings (32, 33). On the inside there is an annular space (33) between the parts (30) and (31), which is filled with viscose material.
  • FIGS. 10 and 11 show structure-borne noise-insulated exhaust pipes (34).
  • the exhaust pipes between the manifold and the muffler in conventional design already emit considerable airborne noise caused by structure-borne noise.
  • an outer tube (35) is arranged at a distance from the exhaust pipe (34), the intermediate space (36) being filled with an elastic intermediate layer (36) (e.g. asbestos substitute) or air.
  • the exhaust pipe (34) is surrounded by a silencer (37), which consists of a perforated plate (39), absorption material (40) and an outer pipe (41) arranged at a distance from it.
  • Fig. 12 shows an intake pipe (42) with surface silencer (46).
  • the suction line (42) is composed of a partial section (43) and a partial section (44) which are connected by an inner compensator (45).
  • the internal compensator is completely sufficient for an unenclosed motor, but not for an encapsulated one.
  • the external expansion joints (47, 48), which are arranged at the end and are connected to the silencer (46), are used here.
  • the surface silencer (46) with external expansion joints (47, 48) is preferably used if a short overall length is required and / or very high pulsations and vibrations are present.
  • Openings here not provided with reference numerals that are important for maintenance work, such as. B. oil filler neck, nozzle for oil level control and oil drain are led out of the capsule.
  • the space between capsule (1) and motor (3) describes a diffuse reverberation space; To reduce the reverberation effect and thus increase the capsule effect, absorption material is installed.
  • the points of absorption are not so much more important, the percentage of the absorption area in the total area, the thickness of the absorption material being limited by the space between the capsule and the motor.
  • closable bores are provided at certain points on the capsule, by means of which holes can be measured at reference points on the motor.
  • the reference points on the engine are specially machined surfaces.

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)
  • Exhaust Silencers (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Medicinal Preparation (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Noise Elimination (AREA)

Claims (3)

1. Dispositif pour atténuer le bruit d'un moteur à combustion interne dans un véhicule automobile, notamment un véhicule utilitaire, au moyen d'une enveloppe (1) entourant le moteur à faible distance, cette enveloppe étant auto-porteuse et en plusieurs parties et étant constituée par un corps de base d'enveloppe (2), formant une unité de montage avec un moteur de base (3), et par un couvercle supérieur (4) et, éventuellement, un revêtement de carter à huile (5), reliés de façon amovible au corps de base (2) de l'enveloppe, tandis que ce corps de base (2) de l'enveloppe comporte des ajours pour permettre la liaison du moteur (3) avec ses appareils auxiliaires susceptibles d'être installés ultérieurement ou d'être remplacés, et plusieurs appareils auxiliaires, notamment la génératrice, les courroies trapézoïdales et leurs poulies (28), ainsi qu'un ventilateur, comportant au moins partiellement, ou par zones, des enveloppes de raccordement qui sont reliées au corps de base (2) de l'enveloppe, tandis que l'intérieur de l'enveloppe est alimenté en air de balayage par des parcours comportant un matériau insonorisant, l'action de cet air de balayage étant susceptible d'être renforcée par le mouvement thermique de l'air à l'intérieur de l'enveloppe ou par l'air provenant du ventilateur de refroidissement, et en outre, le corps de base (2) de l'enveloppe est relié au moteur de base (3) par des éléments de liaison caoutchouc-métal (6, 7), tandis qu'à une certaine distance du tuyau d'échappement (34) est disposé un tube externe (35) et que l'espace intermédiaire est rempli d'air, dispositif caractérisé en ce que :
- l'intérieur de l'enveloppe est alimenté avec une quantité tellement faible d'air de balayage, qu'elle empêche tout juste, de façon efficace, un risque d'explosion dû à l'accumulation de gaz,
- les éléments caoutchouc-métal (6, 7) sont disposés sur la face externe du corps de base (2) de l'enveloppe,
- l'enveloppe (1) comporte des ouvertures pour des tubulures de remplissage d'huile ainsi que pour des tubulures de contrôle du niveau d'huile et de vidange d'huile.
2. Dispositif selon la revendication 1, caractérisé en ce qu'il est prévu, autour du collecteur des gaz d'échappement (9), un espace séparé (10) avec des ouvertures d'entrée et de sortie d'air appropriées.
3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce qu'il est prévu, des deux côtés des surfaces frontales de l'amortisseur de torsion (23), des capsules adaptables (24, 25) dont une (24) est reliée directement et l'autre (25) par l'intermédiaire de plaques de liaison (26) disposées à l'intérieur du passage (27) des courroies trapézoïdales, à la paroi externe du corps de base (2) de l'enveloppe.
EP86109435A 1986-07-10 1986-07-10 Enveloppe pour moteur de propulsion dans les automobiles Expired - Lifetime EP0252178B2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT86109435T ATE50024T1 (de) 1986-07-10 1986-07-10 Kapsel fuer antriebsmotor in kraftfahrzeugen.
DE8686109435T DE3668664D1 (de) 1986-07-10 1986-07-10 Kapsel fuer antriebsmotor in kraftfahrzeugen.
EP86109435A EP0252178B2 (fr) 1986-07-10 1986-07-10 Enveloppe pour moteur de propulsion dans les automobiles
JP62170836A JPS6325322A (ja) 1986-07-10 1987-07-08 自動車の騒音低減装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86109435A EP0252178B2 (fr) 1986-07-10 1986-07-10 Enveloppe pour moteur de propulsion dans les automobiles

Publications (3)

Publication Number Publication Date
EP0252178A1 EP0252178A1 (fr) 1988-01-13
EP0252178B1 EP0252178B1 (fr) 1990-01-31
EP0252178B2 true EP0252178B2 (fr) 1993-06-09

Family

ID=8195261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109435A Expired - Lifetime EP0252178B2 (fr) 1986-07-10 1986-07-10 Enveloppe pour moteur de propulsion dans les automobiles

Country Status (4)

Country Link
EP (1) EP0252178B2 (fr)
JP (1) JPS6325322A (fr)
AT (1) ATE50024T1 (fr)
DE (1) DE3668664D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3929592A1 (de) * 1989-09-06 1991-03-28 Man Nutzfahrzeuge Ag Schallgedaemmte blech-oelwanne fuer brennkraftmaschinen
JP5615588B2 (ja) * 2010-05-06 2014-10-29 日本車輌製造株式会社 エンジン作業機
JP6790954B2 (ja) * 2017-03-27 2020-11-25 トヨタ自動車株式会社 内燃機関

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE306982C (fr) * 1915-12-18
AT265755B (de) * 1966-01-10 1968-10-25 H C Hans Dipl Ing Dr Dr List Brennkraftmaschine mit auf einem Geräteträger angebrachten motorgeriebenen Hilfsaggregaten
AT290921B (de) * 1967-06-02 1971-06-25 H C Hans Dipl Ing Dr Dr List Brennkraftmaschine mit einem im Kurbelgehäuse angeordneten, durchbrochene Wände aufweisenden Traggerüst
US3684053A (en) * 1970-09-02 1972-08-15 List Hans Internal combustion engine with sound-absorbing casing
US4137888A (en) * 1976-11-24 1979-02-06 Allis-Chalmers Corporation Sound abatement device for internal combustion engine
AT365309B (de) * 1977-08-18 1982-01-11 List Hans Brennkraftmaschine mit schalldaemmender verschalung
AT373364B (de) * 1977-10-28 1984-01-10 List Hans Brennkraftmaschine mit schalldaemmender verschalung
AT387624B (de) * 1981-03-31 1989-02-27 Steyr Daimler Puch Ag Hubkolben-brennkraftmaschine
AT380932B (de) * 1981-07-14 1986-07-25 List Hans Wassergekuehlte brennkraftmaschine mit schalldaemmender verschalung

Also Published As

Publication number Publication date
EP0252178A1 (fr) 1988-01-13
EP0252178B1 (fr) 1990-01-31
DE3668664D1 (de) 1990-03-08
JPS6325322A (ja) 1988-02-02
ATE50024T1 (de) 1990-02-15

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