US3796280A - Internal combustion engine with sound-proofing casing - Google Patents

Internal combustion engine with sound-proofing casing Download PDF

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Publication number
US3796280A
US3796280A US00285772A US3796280DA US3796280A US 3796280 A US3796280 A US 3796280A US 00285772 A US00285772 A US 00285772A US 3796280D A US3796280D A US 3796280DA US 3796280 A US3796280 A US 3796280A
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United States
Prior art keywords
casing
internal combustion
combustion engine
engine
sound
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Expired - Lifetime
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US00285772A
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English (en)
Inventor
G Thien
H Fachbach
O Skatsche
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LIST H OE
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Individual
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    • 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

  • This invention relates to an internal combustion engine with a sound-proofing casing located in spaced relation to, and around the outer engine surfaces, and connected with the engine in such a manner as to absorb such sounds as are conducted through solids.
  • the oil sump which is raised as far as above the crankshaft center and attached with its upper border to a laterally spaced supporting flange of the crankcase in such a manner as to absorb sound conducted through solids, provides a sound-proofing casing for the engine joined by soundabsorbing metal sheet mounted on top on each side of the cylinder block, whereas the bottom portion of the oil sump is designed as a spacious oil container.
  • the crankcase of this known type of internal combustion engine is so adapted as to provide an open-worked supporting framework carrying the crankshaft bearings, the raised oil sump forming the oil-wetted outer wall of the engine.
  • the casing comprises a bottom portion raised sump-fashion and having a self-contained lateral aperture for the passage of the crankshaft, the said bottom portion being attached to the cylinder block by means of at least two supporting members isolating sound conducted through solids and located at bottom level for instance, and closed on top by means of a cover, preferably with an upper portion rigidly attached to the bottom portion.
  • the portions constituting the casing assembly are very plain and preferably flat structural elements, it is possible for them to be shaped in such a manner as to facilitate their manufacturing process. It is furthermore, possible to sound-proof internal combustion en gines by means of the encasing according to the invention at a later stage, as required.
  • the bottom portion of the casing terminates approximately at the level of the upper edge of the cylinder head with a directly adjoining flat cover.
  • the space between the casing and the engine can be divided into two chambers sealed off against each other, the chamber enclosed by the bottom portion of the casing being oilwetted and the other chamber surrounded by the upper portion of the casing kept free from oil and containing all auxiliary appliances of the engine. Consequently, the two encased chambers each have entirely different functions since the bottom portion of the casing acts as an oil-wetted outer wall of the engine, while the upper portion of the casing serves exclusively for the soundproofing of the cylinder head area of the internal combustion engine and its auxiliary machines.
  • the bottom portion, and occasionally, also the upper portion of the casing are each of one piece and preferably made of synthetic material. This type can be manufactured at extremely low cost.
  • the lower portion of the casing by combining two or more members inseparably interconnected, preferably by welding, in such a manner as to provide an oil-tight seal.
  • the bottom portion of the casing comprising a plurality of constituent parts is particularly suitable for use in internal combustion engine of large external dimensions.
  • FIG. 1 is a diagrammatic cross-section of a first internal combustion engine according to the invention on line II of FIG. 2,
  • FIG. 2 is a diagrammatic longitudinal section through the engine on line II-II of FIG. 1, and
  • FIG. 3 is a diagrammatic cross-section through a modified form of a sound-proofed internal combustion engine according to the invention.
  • the schematically illustrated internal combustion engine shown in FIGS. 1 and 2 comprises a soundproofing casing enclosing the engine I with the fuel injection pump 2 and the rest of the auxiliary machines in spaced relation.
  • the casing consists of a bottom portion 3 with its walls raised sump-fashion, terminating approximately at the level of the upper edge of the cylinder head Sand provided at its upper border with a circular mounting flange 6.
  • the bottom portion 3 of the casing has a selfcontained lateral aperture 7 for the passage of the crankshaft or of the flywheel flange 8 of the internal combustion engine 1.
  • the bottom portion 3 of the easing is furthermore provided on one of its sidewalls 4 with an aperture which can be tightly closed by means of a removable cover 9, through which access can be gained to the fuel injection pump 2.
  • the bottom portion 3 of the casing is closed by means of an essentially flat cover 11 screwed to the mounting flange 6 of the bottom portion 3 of the casing with the interposition of a gasket 12.
  • the encasing is attached to the engine block by means of a number of sound-absorbing supporting member 13, two of which engage the bottommost part of the bottom portion 3 of the casing.
  • the third supporting member 13 engages the sidewall 4 of the bottom portion 3 of the casing opposite the fuel injection pump 2 on the one hand, and the crankcase sidewall 16 of the engine by means of a bracket 15, on the other hand.
  • Both the bottom portion 3 of the casing and the covers 9 and l 1 can be made from either a synthetic material or from sheet steel or light-metal casting.
  • the bottom portion 3 of the casing comprises two half-shells tightly interconnected by welding along their borders l7.
  • the casing is provided with rubber sleeves 19 and 20, respectively.
  • the design according to FIG. 3 differs from the embodiment hereabove described mainly insofar as the sound-proofing easing of the internal combustion engine 1' comprises a bottom portion 3 and an upper portion 21 rigidly connected with the former, and the cavity between the casing and the engine 1 is divided into two chambers 22 and 23 sealed off against each other.
  • a partition 24 is provided between .the bottom portion 3 of the casing and its upper portion 21. This partition is attached to a flange 26 of the crankcase with the interposition of a soundabsorbing gasket 25.
  • the lower chamber 22 is oil-wetted, which means that the bottom portion 3' of the casing forms the oiltight outer shell of the internal combustion engine 1, whereas the upper chamber 23 is kept free from oil and contains in addition to the fuel injection pump 2 also the rest of the auxiliary units of the internal combustion engine.
  • the various conduits not particularly shown in the drawings, for the supply of cooling water, fuel and oil can be sound-proofed in a manner known per se by the interposition of sound-absorbing elements such as corrugated tubes, fabric hoses and the like.
  • An internal combustion engine with a soundproofing casing arranged in spaced relation to the outer surfaces of the engine and connected to the engine in such a manner as to absorb sound conducted through solids, said casing comprising a troughlike lower casing portion having a bottom and sidewalls, one of the sidewalls having a self-contained aperture for the passage of a crankshaft, an upper casing portion arranged upon said troughlike lower casing portion and rigidly attached to same, a cover placed upon said upper casing portion and closing the casing, at least two soundproofing supporting members mounted on the said troughlike lower casing portion which is attached to the cylinder block by means of said sound-proofing supporting members, a cavity defined by the casing and the outer surfaces of the engine, two chambers sealed off against each other within said cavity, the first of said chambers being enclosed by said trough-like lower casing portion and oil-wetted, the second of said chambers being surrounded by said upper casing portion and kept free from oil and auxiliary machines arranged on the engine

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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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
US00285772A 1971-09-03 1972-09-01 Internal combustion engine with sound-proofing casing Expired - Lifetime US3796280A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT771571A AT328229B (de) 1971-09-03 1971-09-03 Brennkraftmaschine mit schalldammender verschalung

Publications (1)

Publication Number Publication Date
US3796280A true US3796280A (en) 1974-03-12

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ID=3598771

Family Applications (1)

Application Number Title Priority Date Filing Date
US00285772A Expired - Lifetime US3796280A (en) 1971-09-03 1972-09-01 Internal combustion engine with sound-proofing casing

Country Status (4)

Country Link
US (1) US3796280A (enrdf_load_stackoverflow)
AT (1) AT328229B (enrdf_load_stackoverflow)
FR (1) FR2149236A5 (enrdf_load_stackoverflow)
GB (1) GB1381032A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863617A (en) * 1972-11-10 1975-02-04 List Hans Internal combustion engine with sound-proof v-belt pulley
US3924597A (en) * 1974-03-13 1975-12-09 Hatz Motoren Internal combustion engine having a sound-muffling casing
US3949727A (en) * 1974-05-20 1976-04-13 Hans List Carburetor engine with sound-proof encasing
US3964462A (en) * 1974-12-10 1976-06-22 Hans List Sound-proofed internal combustion engine
USRE29923E (en) * 1974-05-20 1979-03-06 Hans List Sound-proofed internal combustion engine
US4186714A (en) * 1978-06-14 1980-02-05 Volkswagenwerk Aktiengesellschaft Sound insulated internal combustion engine
US4213440A (en) * 1977-11-26 1980-07-22 Nissan Motor Company, Limited Low-noise-level reciprocating piston engine
US4231344A (en) * 1978-01-20 1980-11-04 Centro Ricerche Fiat S.P.A. Air induction systems for diesel engines
US4257369A (en) * 1977-09-06 1981-03-24 Nissan Motor Company, Limited Internal combustion engine equipped with noise control device
US4342289A (en) * 1977-08-12 1982-08-03 Klockner-Humboldt-Deutz Aktiengesellschaft Internal combustion engine, especially air-cooled internal combustion engine for vehicles and driving units
DE3425074A1 (de) * 1984-07-07 1986-01-16 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Schallisolierte oelwanne fuer einen lkw-verbrennungsmotor
US20040082234A1 (en) * 2002-09-11 2004-04-29 Honda Giken Kogyo Kabushiki Kaisha Cover structure for a shaft coupling of a personal watercraft
US20110239977A1 (en) * 2010-03-31 2011-10-06 Junya Watanabe Crankcase of internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342897B2 (enrdf_load_stackoverflow) * 1972-11-09 1978-11-15
FR2406724B1 (fr) * 1977-10-18 1985-08-09 Volkswagenwerk Ag Moteur a combustion interne, a blindage d'insonorisation
AT374250B (de) * 1977-10-31 1984-03-26 List Hans Geraeuschgedaemmte hubkolben-brennkraftmaschine
WO1983002820A1 (en) * 1982-02-03 1983-08-18 Söllner, Robert Heating or cooling device
AT393541B (de) * 1987-08-26 1991-11-11 Steyr Daimler Puch Ag Einspritzbrennkraftmaschine
AT402537B (de) * 1993-12-14 1997-06-25 Steyr Nutzfahrzeuge Überwanne um die ölwanne einer brennkraftmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601101A (en) * 1968-06-06 1971-08-24 List Hans Air-cooled internal combustion engine with soundproofing enclosure
US3684053A (en) * 1970-09-02 1972-08-15 List Hans Internal combustion engine with sound-absorbing casing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601101A (en) * 1968-06-06 1971-08-24 List Hans Air-cooled internal combustion engine with soundproofing enclosure
US3684053A (en) * 1970-09-02 1972-08-15 List Hans Internal combustion engine with sound-absorbing casing

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863617A (en) * 1972-11-10 1975-02-04 List Hans Internal combustion engine with sound-proof v-belt pulley
US3924597A (en) * 1974-03-13 1975-12-09 Hatz Motoren Internal combustion engine having a sound-muffling casing
US3949727A (en) * 1974-05-20 1976-04-13 Hans List Carburetor engine with sound-proof encasing
USRE29923E (en) * 1974-05-20 1979-03-06 Hans List Sound-proofed internal combustion engine
US3964462A (en) * 1974-12-10 1976-06-22 Hans List Sound-proofed internal combustion engine
US4342289A (en) * 1977-08-12 1982-08-03 Klockner-Humboldt-Deutz Aktiengesellschaft Internal combustion engine, especially air-cooled internal combustion engine for vehicles and driving units
US4257369A (en) * 1977-09-06 1981-03-24 Nissan Motor Company, Limited Internal combustion engine equipped with noise control device
US4213440A (en) * 1977-11-26 1980-07-22 Nissan Motor Company, Limited Low-noise-level reciprocating piston engine
US4231344A (en) * 1978-01-20 1980-11-04 Centro Ricerche Fiat S.P.A. Air induction systems for diesel engines
US4186714A (en) * 1978-06-14 1980-02-05 Volkswagenwerk Aktiengesellschaft Sound insulated internal combustion engine
DE3425074A1 (de) * 1984-07-07 1986-01-16 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Schallisolierte oelwanne fuer einen lkw-verbrennungsmotor
US20040082234A1 (en) * 2002-09-11 2004-04-29 Honda Giken Kogyo Kabushiki Kaisha Cover structure for a shaft coupling of a personal watercraft
US6875068B2 (en) * 2002-09-11 2005-04-05 Honda Giken Kogyo Kabushiki Kaisha Cover structure for a shaft coupling of a personal watercraft
US20110239977A1 (en) * 2010-03-31 2011-10-06 Junya Watanabe Crankcase of internal combustion engine
US8590667B2 (en) * 2010-03-31 2013-11-26 Honda Motor Co., Ltd. Crankcase of internal combustion engine

Also Published As

Publication number Publication date
ATA771571A (de) 1975-05-15
GB1381032A (en) 1975-01-22
DE2241314A1 (de) 1973-03-22
FR2149236A5 (enrdf_load_stackoverflow) 1973-03-23
DE2241314B2 (de) 1977-03-03
AT328229B (de) 1976-03-10

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