US3540425A - Internal combustion engine with soundproofing cowling - Google Patents

Internal combustion engine with soundproofing cowling Download PDF

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Publication number
US3540425A
US3540425A US3540425DA US3540425A US 3540425 A US3540425 A US 3540425A US 3540425D A US3540425D A US 3540425DA US 3540425 A US3540425 A US 3540425A
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United States
Prior art keywords
soundproofing
cowling
crankcase
internal combustion
cylinder head
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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
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English (en)
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Andreas Scheiterlein
Othmar Skatsche
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Individual
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Individual
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Publication of US3540425A publication Critical patent/US3540425A/en
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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 cowling comprises two or more covers mounted on the side of the crankcase and possibly additional covers in the front and rear area of the engine, all of which extend as far as the upper edge of the cylinder head, being secured to the crankcase in such a manner as to provide isolation from sound conducted through solids, the said covers also surrounding the exhaust and intake manifold, as well as a cowling lid placed on top of the lateral covers in such a way as to provide isolation from sound conducted through solids and topping the rocker box, all of the said covers presenting at least one coating of soundproofing material.
  • a particular advantage of this arrangement resides in comparatively low material and labor costs in addition to the compactness of the extremely effective cowling.
  • Another advantage is derived from the fact that the lid of the rocker box rests directly on the soundproofing cowling which is isolated from sound conducted through solids instead of being secured to the cylinder head proper as has been the case with conventional devices.
  • This arrangement precludes any sound-conducting combination with combustion noises emerging from the cylinder head and mechanical noises produced by the valve gear.
  • the rocker box lid extending beyond the exhaust and intake manifolds also prevents sound from being radiated from these pipes in an upward direction.
  • the various sections ofthe cowling are designed as so-calledsandwich metal sheets, that is, double-walled metal sheets with a soundproofing layer in between, the said metal sheets being preferably ofa slightly arcuate design or otherwise reinforced such as by the provision of stiffening corrugations or otherwise in order to preclude natural vibrations of these sections of the cowling.
  • Soundproofing packings made ofrubber or any otherflexible material, such as elastic plastics for example, can be used as shims inserted between sections of the cowling and the crankcase and/or the cylinder head for the purpose of providing isolation from sounds conducted through solids.
  • the exhaust and the intake manifolds are designed as conduits cast on to the cylinder head, a cooling pipe communicating with the cooling system extending between the exhaust manifold and the outer surface of the cylinder head adjoining the lateral cover.
  • a cooling pipe communicating with the cooling system extending between the exhaust manifold and the outer surface of the cylinder head adjoining the lateral cover.
  • FIG. 1 shows a vertical cross-sectional view of an internal combustion engine according to the invention on line [-1 of FIG. 3;
  • FIG. 2 is a longitudinal cross-sectional view on line II-II of FIG. 1;
  • FIG. 3 is a horizontal cross-sectional view on line Ill-III of FIG. 2.
  • crankcase l of the internal combustion engine rests with its lower connecting flange 2 with the interposition of an elastic packing 3 upon theupper connecting flange 4 of the crank chamber 5 and is connected with the latter in a sound proofing way by means of clamps 6 screwed to the underside of the connecting flange 2 gripping the flange 4 of the crank chamber 5 with the interposition of a packing 7 presenting an angular cross section.
  • the cylinder head 8 of the internal combustion engine is secured to the upper flange 9 of the cylinder block by means of clamping bolts (not shown) in a manner known per se, the underside ofthe cylinder head resting on'the upper rim of the cylinder liners 10 inserted in the self-contained water space so as to secure same in an axial direction.
  • clamping bolts not shown
  • the crankshaft is designated by reference number 36.
  • the intake valves 11 and the exhaust valves 11' Suspended in the cylinder head 8 of a watercooled engine of the four-stroke fuel injection type are the intake valves 11 and the exhaust valves 11', the inlet ports are designated by reference number 12 and the exhaust ports by number 12'.
  • the valves are actuated in a manner known per se via rocker arms 13 and pushrods 14 by means of the camshaft 15 laterally arranged inside the crankcase l.
  • the fuel injection nozzle 16 is inserted in the cylinder head 8 in such a manner as to be slightly inclined in relation to a vertical line.
  • Both the intake manifold 17 and the exhaust manifold 18 of the internal combustion engine are designed as conduits cast on to the cylinder head 8, the exhaust manifold 18 extending inside a cooling conduit 20 communicating with the cooling water chamber 19 of the cylinder head 8, the said cooling conduit presenting a C-shaped cross section which is open in the direction of the center ofthe cylinder head.
  • the internal combustion engine is provided with a soundproofing cowling comprising two covers 21 and 22 secured to the sidewalls of the crankcase l and a lid 23 topping the rocker box 24-.
  • Covers 21, 22 and lid 23 are designed as socalled sandwich metal sheets, that is, double-walled metal sheets with a layer 25 of soundproofing material in between.
  • the two lateral covers 21 and 22 extend from the lower connecting flange 2 of the crankcase approximately as far as the upper edge of the cylinder head 8 and are secured to the crankcase I by means of bolts 26 of which only one is shown on the right side of the drawing, with the interposition of a soundproofing packing 27 and 28 respectively.
  • the cowling lid 23 rests with the interposition ofa grooves packing 31 consisting ofa soundproofing material.
  • the lid 23 is bolted only to the front and rear of the cylinder head 8 in a manner not shown. This bolting provides the necessary contact pressure between the packing 3l and the flanges 29 and 30 of the two covers 21 and 22
  • the cover 21 presents an aperture with a retracted rim 33 (indicated by dash lines in FIG. 1).
  • the passage of the exhaust manifold 18 is sealed by means of an O-ring 35 located in a peripheral corrugation of the rim 33.
  • the passage of the intake manifold l 7 through the lateral cover 22 is of the same design.
  • Additional sheathing covers 37, 38 and 39 are provided at the rear ends of the internal combustion engine and supported on the crankcase 1. by means of soundproofing supporting elements 40 attached to the crankcase in a similar manner as covers 21 and 22 by means of screws 41 with the interposition of elastic packings 42.
  • auxiliary machines attached to the internal combustion engine can be accommodated inside the cowling.
  • An internal combustion engine comprising a crankcase having perforated outer walls, a cylinder head secured to a top of the'crankcase, an intake manifold provided on one side of the said cylinder head, an exhaust manifold located on the side of the cylinder head opposite the intake manifold, a chamber above the said cylinder head, a soundproofing cowling providing an oiltight outer shell for the engine and comprising at least two covers located on the side of the said crankcase in spaced relation to the said perforatedouter walls and extending as far as the upper edge of the said cylinder head, the said covers also surrounding the said intake and exhaust manifolds and being secured to thesaid crankcase, soundproofing packing strips located between the said covers and their points of attachment to the said crankcase, a cowling lid on the said covers located on the side of the crankcase and topping the said chamber above the cylinder head, a soundproofing packing arranged between the'cowling lid and the said covers located on the sides of the crankcase, and a coating of soundproofing material applied
  • An internal combustion engine comprising an additional cover secured to the rear and front face of the engine respectively, and likewise extending as far as the upper edge of the said cylinder head, the said additional covers being secured to the said crankcase, additional soundproofing packing strips provided between the said additional covers and their points of attachment to the said crankcase, and a coating of soundproofing material being applied to the I said additional covers.

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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)
US3540425D 1967-08-21 1968-08-08 Internal combustion engine with soundproofing cowling Expired - Lifetime US3540425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT767767A AT278448B (de) 1967-08-21 1967-08-21 Brennkraftmaschine mit geräuschdämmender Verschalung

Publications (1)

Publication Number Publication Date
US3540425A true US3540425A (en) 1970-11-17

Family

ID=3598425

Family Applications (1)

Application Number Title Priority Date Filing Date
US3540425D Expired - Lifetime US3540425A (en) 1967-08-21 1968-08-08 Internal combustion engine with soundproofing cowling

Country Status (5)

Country Link
US (1) US3540425A (de)
AT (1) AT278448B (de)
DE (1) DE1775468C3 (de)
FR (1) FR1577680A (de)
GB (1) GB1229979A (de)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684053A (en) * 1970-09-02 1972-08-15 List Hans Internal combustion engine with sound-absorbing casing
US3695386A (en) * 1969-03-20 1972-10-03 List Hans Sound-proofing component
US3712280A (en) * 1969-10-31 1973-01-23 M Brille Admission circuits of diesel engines
US3750842A (en) * 1969-11-20 1973-08-07 H Mccaffrey Housing for an air cooled engine
JPS4925901U (de) * 1972-06-16 1974-03-05
JPS4936302U (de) * 1972-06-16 1974-03-30
JPS4965855U (de) * 1972-09-25 1974-06-08
US3863617A (en) * 1972-11-10 1975-02-04 List Hans Internal combustion engine with sound-proof v-belt pulley
US3973548A (en) * 1975-05-29 1976-08-10 Aldo Celli Engine with die cast static parts
US3991735A (en) * 1974-11-26 1976-11-16 International Harvester Company Internal combustion engine
US4037521A (en) * 1975-01-24 1977-07-26 Dowty Hydraulic Units Limited Noise reduction
US4071008A (en) * 1975-04-18 1978-01-31 Hans List Low-noise-level internal combustion engine
US4077383A (en) * 1974-12-11 1978-03-07 Motorenfabrik Hatz Gmbh & Co. Kg Internal combustion engine with sound deadening jacketing
US4186714A (en) * 1978-06-14 1980-02-05 Volkswagenwerk Aktiengesellschaft Sound insulated internal combustion engine
US4203409A (en) * 1977-11-23 1980-05-20 Hans List Low-noise-level internal combustion engine
US4219002A (en) * 1977-10-18 1980-08-26 Volkswagenwerk Aktiengesellschaft Sound insulated internal combustion engine
US4245595A (en) * 1977-09-13 1981-01-20 Nissan Motor Company, Limited Internal combustion engine for motor vehicles
US4278055A (en) * 1977-02-24 1981-07-14 Hans List Low-noise-level internal combustion Vee-engines
US4394853A (en) * 1981-06-22 1983-07-26 General Motors Corporation Engine oil pan isolation mounting
US4446827A (en) * 1980-06-21 1984-05-08 Nissan Motor Co., Ltd. Cylinder block of internal combustion engine
US4474146A (en) * 1981-04-28 1984-10-02 Nissan Motor Co., Ltd. Cylinder block
DE3430289A1 (de) * 1983-09-19 1985-03-28 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH, Prof. Dr.Dr.h.c. Hans List, Graz Brennkraftmaschine mit fluessigkeitskuehlung
US4667628A (en) * 1986-03-06 1987-05-26 General Motors Corporation Oil pan isolation mounting and seal
DE3815406A1 (de) * 1987-05-14 1988-11-24 Steyr Daimler Puch Ag Abgaseinrichtung fuer mehrzylinder-brennkraftmaschinen
US4922870A (en) * 1988-05-06 1990-05-08 Daimler-Benz Ag Arrangement for supporting a crankshaft
AT395895B (de) * 1987-06-10 1993-03-25 Steyr Daimler Puch Ag Brennkraftmaschine mit sie voll umschliessender, schalldaemmender, aus wenigstens zwei teilen zusammengesetzter verschalung
US5452692A (en) * 1993-08-27 1995-09-26 Rover Group Limited Internal combusting engine
US20190061460A1 (en) * 2017-08-22 2019-02-28 Mazda Motor Corporation Engine heat retention structure

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT308475B (de) * 1969-09-08 1973-07-10 List Hans Schalldämmende Verschalung für Brennkraftmaschinen
AT332173B (de) * 1972-10-27 1976-09-10 List Hans Schalldammend gekapselte brennkraftmaschine
JPS4991639U (de) * 1972-12-05 1974-08-08
JPS504142U (de) * 1973-05-14 1975-01-17
FR2406724B1 (fr) * 1977-10-18 1985-08-09 Volkswagenwerk Ag Moteur a combustion interne, a blindage d'insonorisation
AT350855B (de) * 1977-11-23 1979-06-25 List Hans Brennkraftmaschine
DE2912237C2 (de) * 1979-03-28 1983-05-05 Zündapp-Werke GmbH, 8000 München Hubkolben-Brennkraftmaschine mit Flüssigkeitskühlung und mit geräuschdämmender Teilkapselung im Zylinderbereich
DE2928975C2 (de) * 1979-07-18 1986-03-06 Steyr-Daimler-Puch Ag, Wien Brennkraftmaschine mit schalldämmender Verschalung
AT387624B (de) * 1981-03-31 1989-02-27 Steyr Daimler Puch Ag Hubkolben-brennkraftmaschine
DE4342801C2 (de) * 1993-12-15 1999-12-09 Deutz Ag Zylinderkurbelgehäuse
DE4437341C2 (de) * 1994-10-19 1997-07-31 Ford Werke Ag Befestigungsanordnung für Deckel an Maschinen

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695386A (en) * 1969-03-20 1972-10-03 List Hans Sound-proofing component
US3712280A (en) * 1969-10-31 1973-01-23 M Brille Admission circuits of diesel engines
US3750842A (en) * 1969-11-20 1973-08-07 H Mccaffrey Housing for an air cooled engine
US3684053A (en) * 1970-09-02 1972-08-15 List Hans Internal combustion engine with sound-absorbing casing
JPS4925901U (de) * 1972-06-16 1974-03-05
JPS4936302U (de) * 1972-06-16 1974-03-30
JPS4965855U (de) * 1972-09-25 1974-06-08
US3863617A (en) * 1972-11-10 1975-02-04 List Hans Internal combustion engine with sound-proof v-belt pulley
US3991735A (en) * 1974-11-26 1976-11-16 International Harvester Company Internal combustion engine
US4077383A (en) * 1974-12-11 1978-03-07 Motorenfabrik Hatz Gmbh & Co. Kg Internal combustion engine with sound deadening jacketing
US4037521A (en) * 1975-01-24 1977-07-26 Dowty Hydraulic Units Limited Noise reduction
US4071008A (en) * 1975-04-18 1978-01-31 Hans List Low-noise-level internal combustion engine
US3973548A (en) * 1975-05-29 1976-08-10 Aldo Celli Engine with die cast static parts
US4278055A (en) * 1977-02-24 1981-07-14 Hans List Low-noise-level internal combustion Vee-engines
US4245595A (en) * 1977-09-13 1981-01-20 Nissan Motor Company, Limited Internal combustion engine for motor vehicles
US4219002A (en) * 1977-10-18 1980-08-26 Volkswagenwerk Aktiengesellschaft Sound insulated internal combustion engine
US4203409A (en) * 1977-11-23 1980-05-20 Hans List Low-noise-level internal combustion engine
US4186714A (en) * 1978-06-14 1980-02-05 Volkswagenwerk Aktiengesellschaft Sound insulated internal combustion engine
US4446827A (en) * 1980-06-21 1984-05-08 Nissan Motor Co., Ltd. Cylinder block of internal combustion engine
US4474146A (en) * 1981-04-28 1984-10-02 Nissan Motor Co., Ltd. Cylinder block
US4394853A (en) * 1981-06-22 1983-07-26 General Motors Corporation Engine oil pan isolation mounting
DE3430289A1 (de) * 1983-09-19 1985-03-28 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH, Prof. Dr.Dr.h.c. Hans List, Graz Brennkraftmaschine mit fluessigkeitskuehlung
US4667628A (en) * 1986-03-06 1987-05-26 General Motors Corporation Oil pan isolation mounting and seal
DE3815406A1 (de) * 1987-05-14 1988-11-24 Steyr Daimler Puch Ag Abgaseinrichtung fuer mehrzylinder-brennkraftmaschinen
AT395895B (de) * 1987-06-10 1993-03-25 Steyr Daimler Puch Ag Brennkraftmaschine mit sie voll umschliessender, schalldaemmender, aus wenigstens zwei teilen zusammengesetzter verschalung
US4922870A (en) * 1988-05-06 1990-05-08 Daimler-Benz Ag Arrangement for supporting a crankshaft
US5452692A (en) * 1993-08-27 1995-09-26 Rover Group Limited Internal combusting engine
US20190061460A1 (en) * 2017-08-22 2019-02-28 Mazda Motor Corporation Engine heat retention structure
US10688844B2 (en) * 2017-08-22 2020-06-23 Mazda Motor Corporation Engine heat retention structure

Also Published As

Publication number Publication date
DE1775468B2 (de) 1974-06-27
AT278448B (de) 1970-01-26
DE1775468C3 (de) 1975-02-20
DE1775468A1 (de) 1972-04-06
FR1577680A (de) 1969-08-08
GB1229979A (de) 1971-04-28

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